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1/* vi: set sw=4 ts=4: */
2/*
3 * Busybox main internal header file
4 *
5 * Based in part on code from sash, Copyright (c) 1999 by David I. Bell
6 * Permission has been granted to redistribute this code under GPL.
7 *
8 * Licensed under GPLv2, see file LICENSE in this source tree.
9 */
10#ifndef LIBBB_H
11#define LIBBB_H 1
12
13#include "platform.h"
14
15#include <ctype.h>
16#include <dirent.h>
17#include <errno.h>
18#include <fcntl.h>
19#include <inttypes.h>
20#include <netdb.h>
21#include <setjmp.h>
22#include <signal.h>
23#include <paths.h>
24#if defined __UCLIBC__ /* TODO: and glibc? */
25/* use inlined versions of these: */
26# define sigfillset(s) __sigfillset(s)
27# define sigemptyset(s) __sigemptyset(s)
28# define sigisemptyset(s) __sigisemptyset(s)
29#endif
30#include <stdint.h>
31#include <stdio.h>
32#include <stdlib.h>
33#include <stdarg.h>
34#include <stddef.h>
35#include <string.h>
36/* There are two incompatible basename's, let's not use them! */
37/* See the dirname/basename man page for details */
38#include <libgen.h> /* dirname,basename */
39#undef basename
40#define basename dont_use_basename
41#include <poll.h>
42#include <sys/ioctl.h>
43#include <sys/mman.h>
44#include <sys/socket.h>
45#include <sys/stat.h>
46#include <sys/time.h>
47#include <sys/types.h>
48#ifndef major
49# include <sys/sysmacros.h>
50#endif
51#include <sys/wait.h>
52#include <termios.h>
53#include <time.h>
54#include <sys/param.h>
55#include <pwd.h>
56#include <grp.h>
57#if ENABLE_FEATURE_SHADOWPASSWDS
58# if !ENABLE_USE_BB_SHADOW
59/* If using busybox's shadow implementation, do not include the shadow.h
60 * header as the toolchain may not provide it at all.
61 */
62# include <shadow.h>
63# endif
64#endif
65#if defined(ANDROID) || defined(__ANDROID__)
66# define endpwent() ((void)0)
67# define endgrent() ((void)0)
68#endif
69#ifdef HAVE_MNTENT_H
70# include <mntent.h>
71#endif
72#ifdef HAVE_SYS_STATFS_H
73# include <sys/statfs.h>
74#endif
75/* Don't do this here:
76 * #include <sys/sysinfo.h>
77 * Some linux/ includes pull in conflicting definition
78 * of struct sysinfo (only in some toolchanins), which breaks build.
79 * Include sys/sysinfo.h only in those files which need it.
80 */
81#if ENABLE_SELINUX
82# include <selinux/selinux.h>
83# include <selinux/context.h>
84# include <selinux/flask.h>
85# include <selinux/av_permissions.h>
86#endif
87#if ENABLE_FEATURE_UTMP
88# if defined __UCLIBC__ && ( \
89 (UCLIBC_VERSION >= KERNEL_VERSION(0, 9, 32) \
90 && UCLIBC_VERSION < KERNEL_VERSION(0, 9, 34) \
91 && defined __UCLIBC_HAS_UTMPX__ \
92 ) || ( \
93 UCLIBC_VERSION >= KERNEL_VERSION(0, 9, 34) \
94 ) \
95 )
96# include <utmpx.h>
97# elif defined __UCLIBC__
98# include <utmp.h>
99# define utmpx utmp
100# define setutxent setutent
101# define endutxent endutent
102# define getutxent getutent
103# define getutxid getutid
104# define getutxline getutline
105# define pututxline pututline
106# define utmpxname utmpname
107# define updwtmpx updwtmp
108# define _PATH_UTMPX _PATH_UTMP
109# else
110# include <utmp.h>
111# include <utmpx.h>
112# if defined _PATH_UTMP && !defined _PATH_UTMPX
113# define _PATH_UTMPX _PATH_UTMP
114# endif
115# endif
116#endif
117#if ENABLE_LOCALE_SUPPORT
118# include <locale.h>
119#else
120# define setlocale(x,y) ((void)0)
121#endif
122#ifdef DMALLOC
123# include <dmalloc.h>
124#endif
125/* Just in case libc doesn't define some of these... */
126#ifndef _PATH_PASSWD
127#define _PATH_PASSWD "/etc/passwd"
128#endif
129#ifndef _PATH_GROUP
130#define _PATH_GROUP "/etc/group"
131#endif
132#ifndef _PATH_SHADOW
133#define _PATH_SHADOW "/etc/shadow"
134#endif
135#ifndef _PATH_GSHADOW
136#define _PATH_GSHADOW "/etc/gshadow"
137#endif
138#if defined __FreeBSD__ || defined __OpenBSD__
139# include <netinet/in.h>
140# include <arpa/inet.h>
141#elif defined __APPLE__
142# include <netinet/in.h>
143#else
144# include <arpa/inet.h>
145//This breaks on bionic:
146//# if !defined(__socklen_t_defined) && !defined(_SOCKLEN_T_DECLARED)
147///* We #define socklen_t *after* includes, otherwise we get
148// * typedef redefinition errors from system headers
149// * (in case "is it defined already" detection above failed)
150// */
151//# define socklen_t bb_socklen_t
152// typedef unsigned socklen_t;
153//# endif
154//if this is still needed, add a fix along the lines of
155// ifdef SPECIFIC_BROKEN_LIBC_CHECK / typedef socklen_t / endif
156//in platform.h instead!
157#endif
158#ifndef HAVE_CLEARENV
159# define clearenv() do { if (environ) environ[0] = NULL; } while (0)
160#endif
161#ifndef HAVE_FDATASYNC
162# define fdatasync fsync
163#endif
164#ifndef HAVE_XTABS
165# define XTABS TAB3
166#endif
167
168
169/* Some libc's forget to declare these, do it ourself */
170
171extern char **environ;
172#if defined(__GLIBC__) && __GLIBC__ < 2
173int vdprintf(int d, const char *format, va_list ap);
174#endif
175/* klogctl is in libc's klog.h, but we cheat and not #include that */
176int klogctl(int type, char *b, int len);
177#ifndef PATH_MAX
178# define PATH_MAX 256
179#endif
180#ifndef BUFSIZ
181# define BUFSIZ 4096
182#endif
183
184
185/* Busybox does not use threads, we can speed up stdio. */
186#ifdef HAVE_UNLOCKED_STDIO
187# undef getc
188# define getc(stream) getc_unlocked(stream)
189# undef getchar
190# define getchar() getchar_unlocked()
191# undef putc
192# define putc(c,stream) putc_unlocked(c,stream)
193# undef putchar
194# define putchar(c) putchar_unlocked(c)
195# undef fgetc
196# define fgetc(stream) getc_unlocked(stream)
197# undef fputc
198# define fputc(c,stream) putc_unlocked(c,stream)
199#endif
200/* Above functions are required by POSIX.1-2008, below ones are extensions */
201#ifdef HAVE_UNLOCKED_LINE_OPS
202# undef fgets
203# define fgets(s,n,stream) fgets_unlocked(s,n,stream)
204# undef fputs
205# define fputs(s,stream) fputs_unlocked(s,stream)
206/* musl <= 1.1.15 does not support fflush_unlocked(NULL) */
207//# undef fflush
208//# define fflush(stream) fflush_unlocked(stream)
209# undef feof
210# define feof(stream) feof_unlocked(stream)
211# undef ferror
212# define ferror(stream) ferror_unlocked(stream)
213# undef fileno
214# define fileno(stream) fileno_unlocked(stream)
215#endif
216
217
218/* Make all declarations hidden (-fvisibility flag only affects definitions) */
219/* (don't include system headers after this until corresponding pop!) */
220PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
221
222
223#if ENABLE_USE_BB_PWD_GRP
224# include "pwd_.h"
225# include "grp_.h"
226#endif
227#if ENABLE_FEATURE_SHADOWPASSWDS
228# if ENABLE_USE_BB_SHADOW
229# include "shadow_.h"
230# endif
231#endif
232
233/* Tested to work correctly with all int types (IIRC :]) */
234#define MAXINT(T) (T)( \
235 ((T)-1) > 0 \
236 ? (T)-1 \
237 : (T)~((T)1 << (sizeof(T)*8-1)) \
238 )
239
240#define MININT(T) (T)( \
241 ((T)-1) > 0 \
242 ? (T)0 \
243 : ((T)1 << (sizeof(T)*8-1)) \
244 )
245
246/* Large file support */
247/* Note that CONFIG_LFS=y forces bbox to be built with all common ops
248 * (stat, lseek etc) mapped to "largefile" variants by libc.
249 * Practically it means that open() automatically has O_LARGEFILE added
250 * and all filesize/file_offset parameters and struct members are "large"
251 * (in today's world - signed 64bit). For full support of large files,
252 * we need a few helper #defines (below) and careful use of off_t
253 * instead of int/ssize_t. No lseek64(), O_LARGEFILE etc necessary */
254#if ENABLE_LFS
255/* CONFIG_LFS is on */
256# if ULONG_MAX > 0xffffffff
257/* "long" is long enough on this system */
258typedef unsigned long uoff_t;
259# define XATOOFF(a) xatoul_range((a), 0, LONG_MAX)
260/* usage: sz = BB_STRTOOFF(s, NULL, 10); if (errno || sz < 0) die(); */
261# define BB_STRTOOFF bb_strtoul
262# define STRTOOFF strtoul
263/* usage: printf("size: %"OFF_FMT"d (%"OFF_FMT"x)\n", sz, sz); */
264# define OFF_FMT "l"
265# else
266/* "long" is too short, need "long long" */
267typedef unsigned long long uoff_t;
268# define XATOOFF(a) xatoull_range((a), 0, LLONG_MAX)
269# define BB_STRTOOFF bb_strtoull
270# define STRTOOFF strtoull
271# define OFF_FMT "ll"
272# endif
273#else
274/* CONFIG_LFS is off */
275# if UINT_MAX == 0xffffffff
276/* While sizeof(off_t) == sizeof(int), off_t is typedef'ed to long anyway.
277 * gcc will throw warnings on printf("%d", off_t). Crap... */
278typedef unsigned long uoff_t;
279# define XATOOFF(a) xatoi_positive(a)
280# define BB_STRTOOFF bb_strtou
281# define STRTOOFF strtol
282# define OFF_FMT "l"
283# else
284typedef unsigned long uoff_t;
285# define XATOOFF(a) xatoul_range((a), 0, LONG_MAX)
286# define BB_STRTOOFF bb_strtoul
287# define STRTOOFF strtol
288# define OFF_FMT "l"
289# endif
290#endif
291/* scary. better ideas? (but do *test* them first!) */
292#define OFF_T_MAX ((off_t)~((off_t)1 << (sizeof(off_t)*8-1)))
293/* Users report bionic to use 32-bit off_t even if LARGEFILE support is requested.
294 * We misdetected that. Don't let it build:
295 */
296struct BUG_off_t_size_is_misdetected {
297 char BUG_off_t_size_is_misdetected[sizeof(off_t) == sizeof(uoff_t) ? 1 : -1];
298};
299
300/* Some useful definitions */
301#undef FALSE
302#define FALSE ((int) 0)
303#undef TRUE
304#define TRUE ((int) 1)
305#undef SKIP
306#define SKIP ((int) 2)
307
308/* Macros for min/max. */
309#ifndef MIN
310#define MIN(a,b) (((a)<(b))?(a):(b))
311#endif
312
313#ifndef MAX
314#define MAX(a,b) (((a)>(b))?(a):(b))
315#endif
316
317/* buffer allocation schemes */
318#if ENABLE_FEATURE_BUFFERS_GO_ON_STACK
319#define RESERVE_CONFIG_BUFFER(buffer,len) char buffer[len]
320#define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char buffer[len]
321#define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
322#else
323#if ENABLE_FEATURE_BUFFERS_GO_IN_BSS
324#define RESERVE_CONFIG_BUFFER(buffer,len) static char buffer[len]
325#define RESERVE_CONFIG_UBUFFER(buffer,len) static unsigned char buffer[len]
326#define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
327#else
328#define RESERVE_CONFIG_BUFFER(buffer,len) char *buffer = xmalloc(len)
329#define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char *buffer = xmalloc(len)
330#define RELEASE_CONFIG_BUFFER(buffer) free(buffer)
331#endif
332#endif
333
334#if defined(__GLIBC__)
335/* glibc uses __errno_location() to get a ptr to errno */
336/* We can just memorize it once - no multithreading in busybox :) */
337extern int *const bb_errno;
338#undef errno
339#define errno (*bb_errno)
340#endif
341
342#if !(ULONG_MAX > 0xffffffff)
343/* Only 32-bit CPUs need this, 64-bit ones use inlined version */
344uint64_t bb_bswap_64(uint64_t x) FAST_FUNC;
345#endif
346
347unsigned long long monotonic_ns(void) FAST_FUNC;
348unsigned long long monotonic_us(void) FAST_FUNC;
349unsigned long long monotonic_ms(void) FAST_FUNC;
350unsigned monotonic_sec(void) FAST_FUNC;
351
352extern void chomp(char *s) FAST_FUNC;
353extern void trim(char *s) FAST_FUNC;
354extern char *skip_whitespace(const char *) FAST_FUNC;
355extern char *skip_non_whitespace(const char *) FAST_FUNC;
356extern char *skip_dev_pfx(const char *tty_name) FAST_FUNC;
357
358extern char *strrstr(const char *haystack, const char *needle) FAST_FUNC;
359
360//TODO: supply a pointer to char[11] buffer (avoid statics)?
361extern const char *bb_mode_string(mode_t mode) FAST_FUNC;
362extern int is_directory(const char *name, int followLinks) FAST_FUNC;
363enum { /* cp.c, mv.c, install.c depend on these values. CAREFUL when changing them! */
364 FILEUTILS_PRESERVE_STATUS = 1 << 0, /* -p */
365 FILEUTILS_DEREFERENCE = 1 << 1, /* !-d */
366 FILEUTILS_RECUR = 1 << 2, /* -R */
367 FILEUTILS_FORCE = 1 << 3, /* -f */
368 FILEUTILS_INTERACTIVE = 1 << 4, /* -i */
369 FILEUTILS_MAKE_HARDLINK = 1 << 5, /* -l */
370 FILEUTILS_MAKE_SOFTLINK = 1 << 6, /* -s */
371 FILEUTILS_DEREF_SOFTLINK = 1 << 7, /* -L */
372 FILEUTILS_DEREFERENCE_L0 = 1 << 8, /* -H */
373 /* -a = -pdR (mapped in cp.c) */
374 /* -r = -dR (mapped in cp.c) */
375 /* -P = -d (mapped in cp.c) */
376 FILEUTILS_VERBOSE = (1 << 12) * ENABLE_FEATURE_VERBOSE, /* -v */
377 FILEUTILS_UPDATE = 1 << 13, /* -u */
378#if ENABLE_SELINUX
379 FILEUTILS_PRESERVE_SECURITY_CONTEXT = 1 << 14, /* -c */
380#endif
381 FILEUTILS_RMDEST = 1 << (15 - !ENABLE_SELINUX), /* --remove-destination */
382 /*
383 * Hole. cp may have some bits set here,
384 * they should not affect remove_file()/copy_file()
385 */
386#if ENABLE_SELINUX
387 FILEUTILS_SET_SECURITY_CONTEXT = 1 << 30,
388#endif
389 FILEUTILS_IGNORE_CHMOD_ERR = 1 << 31,
390};
391#define FILEUTILS_CP_OPTSTR "pdRfilsLHarPvu" IF_SELINUX("c")
392extern int remove_file(const char *path, int flags) FAST_FUNC;
393/* NB: without FILEUTILS_RECUR in flags, it will basically "cat"
394 * the source, not copy (unless "source" is a directory).
395 * This makes "cp /dev/null file" and "install /dev/null file" (!!!)
396 * work coreutils-compatibly. */
397extern int copy_file(const char *source, const char *dest, int flags) FAST_FUNC;
398
399enum {
400 ACTION_RECURSE = (1 << 0),
401 ACTION_FOLLOWLINKS = (1 << 1),
402 ACTION_FOLLOWLINKS_L0 = (1 << 2),
403 ACTION_DEPTHFIRST = (1 << 3),
404 /*ACTION_REVERSE = (1 << 4), - unused */
405 ACTION_QUIET = (1 << 5),
406 ACTION_DANGLING_OK = (1 << 6),
407};
408typedef uint8_t recurse_flags_t;
409extern int recursive_action(const char *fileName, unsigned flags,
410 int FAST_FUNC (*fileAction)(const char *fileName, struct stat* statbuf, void* userData, int depth),
411 int FAST_FUNC (*dirAction)(const char *fileName, struct stat* statbuf, void* userData, int depth),
412 void* userData, unsigned depth) FAST_FUNC;
413extern int device_open(const char *device, int mode) FAST_FUNC;
414enum { GETPTY_BUFSIZE = 16 }; /* more than enough for "/dev/ttyXXX" */
415extern int xgetpty(char *line) FAST_FUNC;
416extern int get_console_fd_or_die(void) FAST_FUNC;
417extern void console_make_active(int fd, const int vt_num) FAST_FUNC;
418extern char *find_block_device(const char *path) FAST_FUNC;
419/* bb_copyfd_XX print read/write errors and return -1 if they occur */
420extern off_t bb_copyfd_eof(int fd1, int fd2) FAST_FUNC;
421extern off_t bb_copyfd_size(int fd1, int fd2, off_t size) FAST_FUNC;
422extern void bb_copyfd_exact_size(int fd1, int fd2, off_t size) FAST_FUNC;
423/* "short" copy can be detected by return value < size */
424/* this helper yells "short read!" if param is not -1 */
425extern void complain_copyfd_and_die(off_t sz) NORETURN FAST_FUNC;
426
427extern char bb_process_escape_sequence(const char **ptr) FAST_FUNC;
428char* strcpy_and_process_escape_sequences(char *dst, const char *src) FAST_FUNC;
429/* xxxx_strip version can modify its parameter:
430 * "/" -> "/"
431 * "abc" -> "abc"
432 * "abc/def" -> "def"
433 * "abc/def/" -> "def" !!
434 */
435char *bb_get_last_path_component_strip(char *path) FAST_FUNC;
436/* "abc/def/" -> "" and it never modifies 'path' */
437char *bb_get_last_path_component_nostrip(const char *path) FAST_FUNC;
438/* Simpler version: does not special case "/" string */
439const char *bb_basename(const char *name) FAST_FUNC;
440/* NB: can violate const-ness (similarly to strchr) */
441char *last_char_is(const char *s, int c) FAST_FUNC;
442const char* endofname(const char *name) FAST_FUNC;
443char *is_prefixed_with(const char *string, const char *key) FAST_FUNC;
444char *is_suffixed_with(const char *string, const char *key) FAST_FUNC;
445
446int ndelay_on(int fd) FAST_FUNC;
447int ndelay_off(int fd) FAST_FUNC;
448void close_on_exec_on(int fd) FAST_FUNC;
449void xdup2(int, int) FAST_FUNC;
450void xmove_fd(int, int) FAST_FUNC;
451
452
453DIR *xopendir(const char *path) FAST_FUNC;
454DIR *warn_opendir(const char *path) FAST_FUNC;
455
456char *xmalloc_realpath(const char *path) FAST_FUNC RETURNS_MALLOC;
457char *xmalloc_readlink(const char *path) FAST_FUNC RETURNS_MALLOC;
458char *xmalloc_readlink_or_warn(const char *path) FAST_FUNC RETURNS_MALLOC;
459/* !RETURNS_MALLOC: it's a realloc-like function */
460char *xrealloc_getcwd_or_warn(char *cwd) FAST_FUNC;
461
462char *xmalloc_follow_symlinks(const char *path) FAST_FUNC RETURNS_MALLOC;
463
464
465enum {
466 /* bb_signals(BB_FATAL_SIGS, handler) catches all signals which
467 * otherwise would kill us, except for those resulting from bugs:
468 * SIGSEGV, SIGILL, SIGFPE.
469 * Other fatal signals not included (TODO?):
470 * SIGBUS Bus error (bad memory access)
471 * SIGPOLL Pollable event. Synonym of SIGIO
472 * SIGPROF Profiling timer expired
473 * SIGSYS Bad argument to routine
474 * SIGTRAP Trace/breakpoint trap
475 *
476 * The only known arch with some of these sigs not fitting
477 * into 32 bits is parisc (SIGXCPU=33, SIGXFSZ=34, SIGSTKFLT=36).
478 * Dance around with long long to guard against that...
479 */
480 BB_FATAL_SIGS = (int)(0
481 + (1LL << SIGHUP)
482 + (1LL << SIGINT)
483 + (1LL << SIGTERM)
484 + (1LL << SIGPIPE) // Write to pipe with no readers
485 + (1LL << SIGQUIT) // Quit from keyboard
486 + (1LL << SIGABRT) // Abort signal from abort(3)
487 + (1LL << SIGALRM) // Timer signal from alarm(2)
488 + (1LL << SIGVTALRM) // Virtual alarm clock
489 + (1LL << SIGXCPU) // CPU time limit exceeded
490 + (1LL << SIGXFSZ) // File size limit exceeded
491 + (1LL << SIGUSR1) // Yes kids, these are also fatal!
492 + (1LL << SIGUSR2)
493 + 0),
494};
495void bb_signals(int sigs, void (*f)(int)) FAST_FUNC;
496/* Unlike signal() and bb_signals, sets handler with sigaction()
497 * and in a way that while signal handler is run, no other signals
498 * will be blocked; syscalls will not be restarted: */
499void bb_signals_recursive_norestart(int sigs, void (*f)(int)) FAST_FUNC;
500/* syscalls like read() will be interrupted with EINTR: */
501void signal_no_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC;
502/* syscalls like read() won't be interrupted (though select/poll will be): */
503void signal_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC;
504void wait_for_any_sig(void) FAST_FUNC;
505void kill_myself_with_sig(int sig) NORETURN FAST_FUNC;
506void sig_block(int sig) FAST_FUNC;
507void sig_unblock(int sig) FAST_FUNC;
508/* Will do sigaction(signum, act, NULL): */
509int sigaction_set(int sig, const struct sigaction *act) FAST_FUNC;
510/* SIG_BLOCK/SIG_UNBLOCK all signals: */
511int sigprocmask_allsigs(int how) FAST_FUNC;
512/* Standard handler which just records signo */
513extern smallint bb_got_signal;
514void record_signo(int signo); /* not FAST_FUNC! */
515
516
517void xsetgid(gid_t gid) FAST_FUNC;
518void xsetuid(uid_t uid) FAST_FUNC;
519void xsetegid(gid_t egid) FAST_FUNC;
520void xseteuid(uid_t euid) FAST_FUNC;
521void xchdir(const char *path) FAST_FUNC;
522void xfchdir(int fd) FAST_FUNC;
523void xchroot(const char *path) FAST_FUNC;
524void xsetenv(const char *key, const char *value) FAST_FUNC;
525void bb_unsetenv(const char *key) FAST_FUNC;
526void bb_unsetenv_and_free(char *key) FAST_FUNC;
527void xunlink(const char *pathname) FAST_FUNC;
528void xstat(const char *pathname, struct stat *buf) FAST_FUNC;
529void xfstat(int fd, struct stat *buf, const char *errmsg) FAST_FUNC;
530int open3_or_warn(const char *pathname, int flags, int mode) FAST_FUNC;
531int open_or_warn(const char *pathname, int flags) FAST_FUNC;
532int xopen3(const char *pathname, int flags, int mode) FAST_FUNC;
533int xopen(const char *pathname, int flags) FAST_FUNC;
534int xopen_nonblocking(const char *pathname) FAST_FUNC;
535int xopen_as_uid_gid(const char *pathname, int flags, uid_t u, gid_t g) FAST_FUNC;
536int open_or_warn_stdin(const char *pathname) FAST_FUNC;
537int xopen_stdin(const char *pathname) FAST_FUNC;
538void xrename(const char *oldpath, const char *newpath) FAST_FUNC;
539int rename_or_warn(const char *oldpath, const char *newpath) FAST_FUNC;
540off_t xlseek(int fd, off_t offset, int whence) FAST_FUNC;
541int xmkstemp(char *template) FAST_FUNC;
542off_t fdlength(int fd) FAST_FUNC;
543
544uoff_t FAST_FUNC get_volume_size_in_bytes(int fd,
545 const char *override,
546 unsigned override_units,
547 int extend);
548
549void xpipe(int filedes[2]) FAST_FUNC;
550/* In this form code with pipes is much more readable */
551struct fd_pair { int rd; int wr; };
552#define piped_pair(pair) pipe(&((pair).rd))
553#define xpiped_pair(pair) xpipe(&((pair).rd))
554
555/* Useful for having small structure members/global variables */
556typedef int8_t socktype_t;
557typedef int8_t family_t;
558struct BUG_too_small {
559 char BUG_socktype_t_too_small[(0
560 | SOCK_STREAM
561 | SOCK_DGRAM
562 | SOCK_RDM
563 | SOCK_SEQPACKET
564 | SOCK_RAW
565 ) <= 127 ? 1 : -1];
566 char BUG_family_t_too_small[(0
567 | AF_UNSPEC
568 | AF_INET
569 | AF_INET6
570 | AF_UNIX
571#ifdef AF_PACKET
572 | AF_PACKET
573#endif
574#ifdef AF_NETLINK
575 | AF_NETLINK
576#endif
577 /* | AF_DECnet */
578 /* | AF_IPX */
579 ) <= 127 ? 1 : -1];
580};
581
582
583void parse_datestr(const char *date_str, struct tm *ptm) FAST_FUNC;
584time_t validate_tm_time(const char *date_str, struct tm *ptm) FAST_FUNC;
585char *strftime_HHMMSS(char *buf, unsigned len, time_t *tp) FAST_FUNC;
586char *strftime_YYYYMMDDHHMMSS(char *buf, unsigned len, time_t *tp) FAST_FUNC;
587
588int xsocket(int domain, int type, int protocol) FAST_FUNC;
589void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen) FAST_FUNC;
590void xlisten(int s, int backlog) FAST_FUNC;
591void xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen) FAST_FUNC;
592ssize_t xsendto(int s, const void *buf, size_t len, const struct sockaddr *to,
593 socklen_t tolen) FAST_FUNC;
594
595int setsockopt_int(int fd, int level, int optname, int optval) FAST_FUNC;
596int setsockopt_1(int fd, int level, int optname) FAST_FUNC;
597int setsockopt_SOL_SOCKET_int(int fd, int optname, int optval) FAST_FUNC;
598int setsockopt_SOL_SOCKET_1(int fd, int optname) FAST_FUNC;
599/* SO_REUSEADDR allows a server to rebind to an address that is already
600 * "in use" by old connections to e.g. previous server instance which is
601 * killed or crashed. Without it bind will fail until all such connections
602 * time out. Linux does not allow multiple live binds on same ip:port
603 * regardless of SO_REUSEADDR (unlike some other flavors of Unix).
604 * Turn it on before you call bind(). */
605void setsockopt_reuseaddr(int fd) FAST_FUNC; /* On Linux this never fails. */
606int setsockopt_keepalive(int fd) FAST_FUNC;
607int setsockopt_broadcast(int fd) FAST_FUNC;
608int setsockopt_bindtodevice(int fd, const char *iface) FAST_FUNC;
609/* NB: returns port in host byte order */
610unsigned bb_lookup_port(const char *port, const char *protocol, unsigned default_port) FAST_FUNC;
611typedef struct len_and_sockaddr {
612 socklen_t len;
613 union {
614 struct sockaddr sa;
615 struct sockaddr_in sin;
616#if ENABLE_FEATURE_IPV6
617 struct sockaddr_in6 sin6;
618#endif
619 } u;
620} len_and_sockaddr;
621enum {
622 LSA_LEN_SIZE = offsetof(len_and_sockaddr, u),
623 LSA_SIZEOF_SA = sizeof(
624 union {
625 struct sockaddr sa;
626 struct sockaddr_in sin;
627#if ENABLE_FEATURE_IPV6
628 struct sockaddr_in6 sin6;
629#endif
630 }
631 )
632};
633/* Create stream socket, and allocate suitable lsa.
634 * (lsa of correct size and lsa->sa.sa_family (AF_INET/AF_INET6))
635 * af == AF_UNSPEC will result in trying to create IPv6 socket,
636 * and if kernel doesn't support it, fall back to IPv4.
637 * This is useful if you plan to bind to resulting local lsa.
638 */
639int xsocket_type(len_and_sockaddr **lsap, int af, int sock_type) FAST_FUNC;
640int xsocket_stream(len_and_sockaddr **lsap) FAST_FUNC;
641/* Create server socket bound to bindaddr:port. bindaddr can be NULL,
642 * numeric IP ("N.N.N.N") or numeric IPv6 address,
643 * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
644 * Only if there is no suffix, port argument is used */
645/* NB: these set SO_REUSEADDR before bind */
646int create_and_bind_stream_or_die(const char *bindaddr, int port) FAST_FUNC;
647int create_and_bind_dgram_or_die(const char *bindaddr, int port) FAST_FUNC;
648/* Create client TCP socket connected to peer:port. Peer cannot be NULL.
649 * Peer can be numeric IP ("N.N.N.N"), numeric IPv6 address or hostname,
650 * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
651 * If there is no suffix, port argument is used */
652int create_and_connect_stream_or_die(const char *peer, int port) FAST_FUNC;
653/* Connect to peer identified by lsa */
654int xconnect_stream(const len_and_sockaddr *lsa) FAST_FUNC;
655/* Get local address of bound or accepted socket */
656len_and_sockaddr *get_sock_lsa(int fd) FAST_FUNC RETURNS_MALLOC;
657/* Get remote address of connected or accepted socket */
658len_and_sockaddr *get_peer_lsa(int fd) FAST_FUNC RETURNS_MALLOC;
659/* Return malloc'ed len_and_sockaddr with socket address of host:port
660 * Currently will return IPv4 or IPv6 sockaddrs only
661 * (depending on host), but in theory nothing prevents e.g.
662 * UNIX socket address being returned, IPX sockaddr etc...
663 * On error does bb_error_msg and returns NULL */
664len_and_sockaddr* host2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
665/* Version which dies on error */
666len_and_sockaddr* xhost2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
667len_and_sockaddr* xdotted2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
668/* Same, useful if you want to force family (e.g. IPv6) */
669#if !ENABLE_FEATURE_IPV6
670#define host_and_af2sockaddr(host, port, af) host2sockaddr((host), (port))
671#define xhost_and_af2sockaddr(host, port, af) xhost2sockaddr((host), (port))
672#else
673len_and_sockaddr* host_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC;
674len_and_sockaddr* xhost_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC;
675#endif
676/* Assign sin[6]_port member if the socket is an AF_INET[6] one,
677 * otherwise no-op. Useful for ftp.
678 * NB: does NOT do htons() internally, just direct assignment. */
679void set_nport(struct sockaddr *sa, unsigned port) FAST_FUNC;
680/* Retrieve sin[6]_port or return -1 for non-INET[6] lsa's */
681int get_nport(const struct sockaddr *sa) FAST_FUNC;
682/* Reverse DNS. Returns NULL on failure. */
683char* xmalloc_sockaddr2host(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
684/* This one doesn't append :PORTNUM */
685char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
686/* This one also doesn't fall back to dotted IP (returns NULL) */
687char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
688/* inet_[ap]ton on steroids */
689char* xmalloc_sockaddr2dotted(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
690char* xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
691// "old" (ipv4 only) API
692// users: traceroute.c hostname.c - use _list_ of all IPs
693struct hostent *xgethostbyname(const char *name) FAST_FUNC;
694// Also mount.c and inetd.c are using gethostbyname(),
695// + inet_common.c has additional IPv4-only stuff
696
697
698void socket_want_pktinfo(int fd) FAST_FUNC;
699ssize_t send_to_from(int fd, void *buf, size_t len, int flags,
700 const struct sockaddr *to,
701 const struct sockaddr *from,
702 socklen_t tolen) FAST_FUNC;
703ssize_t recv_from_to(int fd, void *buf, size_t len, int flags,
704 struct sockaddr *from,
705 struct sockaddr *to,
706 socklen_t sa_size) FAST_FUNC;
707
708uint16_t inet_cksum(uint16_t *addr, int len) FAST_FUNC;
709
710char *xstrdup(const char *s) FAST_FUNC RETURNS_MALLOC;
711char *xstrndup(const char *s, int n) FAST_FUNC RETURNS_MALLOC;
712void *xmemdup(const void *s, int n) FAST_FUNC RETURNS_MALLOC;
713void overlapping_strcpy(char *dst, const char *src) FAST_FUNC;
714char *safe_strncpy(char *dst, const char *src, size_t size) FAST_FUNC;
715char *strncpy_IFNAMSIZ(char *dst, const char *src) FAST_FUNC;
716unsigned count_strstr(const char *str, const char *sub) FAST_FUNC;
717char *xmalloc_substitute_string(const char *src, int count, const char *sub, const char *repl) FAST_FUNC;
718/* Guaranteed to NOT be a macro (smallest code). Saves nearly 2k on uclibc.
719 * But potentially slow, don't use in one-billion-times loops */
720int bb_putchar(int ch) FAST_FUNC;
721/* Note: does not use stdio, writes to fd 2 directly */
722int bb_putchar_stderr(char ch) FAST_FUNC;
723char *xasprintf(const char *format, ...) __attribute__ ((format(printf, 1, 2))) FAST_FUNC RETURNS_MALLOC;
724char *auto_string(char *str) FAST_FUNC;
725// gcc-4.1.1 still isn't good enough at optimizing it
726// (+200 bytes compared to macro)
727//static ALWAYS_INLINE
728//int LONE_DASH(const char *s) { return s[0] == '-' && !s[1]; }
729//static ALWAYS_INLINE
730//int NOT_LONE_DASH(const char *s) { return s[0] != '-' || s[1]; }
731#define LONE_DASH(s) ((s)[0] == '-' && !(s)[1])
732#define NOT_LONE_DASH(s) ((s)[0] != '-' || (s)[1])
733#define LONE_CHAR(s,c) ((s)[0] == (c) && !(s)[1])
734#define NOT_LONE_CHAR(s,c) ((s)[0] != (c) || (s)[1])
735#define DOT_OR_DOTDOT(s) ((s)[0] == '.' && (!(s)[1] || ((s)[1] == '.' && !(s)[2])))
736
737typedef struct uni_stat_t {
738 unsigned byte_count;
739 unsigned unicode_count;
740 unsigned unicode_width;
741} uni_stat_t;
742/* Returns a string with unprintable chars replaced by '?' or
743 * SUBST_WCHAR. This function is unicode-aware. */
744const char* FAST_FUNC printable_string(uni_stat_t *stats, const char *str);
745/* Prints unprintable char ch as ^C or M-c to file
746 * (M-c is used only if ch is ORed with PRINTABLE_META),
747 * else it is printed as-is (except for ch = 0x9b) */
748enum { PRINTABLE_META = 0x100 };
749void fputc_printable(int ch, FILE *file) FAST_FUNC;
750/* Return a string that is the printable representation of character ch.
751 * Buffer must hold at least four characters. */
752enum {
753 VISIBLE_ENDLINE = 1 << 0,
754 VISIBLE_SHOW_TABS = 1 << 1,
755};
756void visible(unsigned ch, char *buf, int flags) FAST_FUNC;
757
758/* dmalloc will redefine these to it's own implementation. It is safe
759 * to have the prototypes here unconditionally. */
760void *malloc_or_warn(size_t size) FAST_FUNC RETURNS_MALLOC;
761void *xmalloc(size_t size) FAST_FUNC RETURNS_MALLOC;
762void *xzalloc(size_t size) FAST_FUNC RETURNS_MALLOC;
763void *xrealloc(void *old, size_t size) FAST_FUNC;
764/* After v = xrealloc_vector(v, SHIFT, idx) it's ok to use
765 * at least v[idx] and v[idx+1], for all idx values.
766 * SHIFT specifies how many new elements are added (1:2, 2:4, ..., 8:256...)
767 * when all elements are used up. New elements are zeroed out.
768 * xrealloc_vector(v, SHIFT, idx) *MUST* be called with consecutive IDXs -
769 * skipping an index is a bad bug - it may miss a realloc!
770 */
771#define xrealloc_vector(vector, shift, idx) \
772 xrealloc_vector_helper((vector), (sizeof((vector)[0]) << 8) + (shift), (idx))
773void* xrealloc_vector_helper(void *vector, unsigned sizeof_and_shift, int idx) FAST_FUNC;
774
775
776extern ssize_t safe_read(int fd, void *buf, size_t count) FAST_FUNC;
777extern ssize_t nonblock_immune_read(int fd, void *buf, size_t count) FAST_FUNC;
778// NB: will return short read on error, not -1,
779// if some data was read before error occurred
780extern ssize_t full_read(int fd, void *buf, size_t count) FAST_FUNC;
781extern void xread(int fd, void *buf, size_t count) FAST_FUNC;
782extern unsigned char xread_char(int fd) FAST_FUNC;
783extern ssize_t read_close(int fd, void *buf, size_t maxsz) FAST_FUNC;
784extern ssize_t open_read_close(const char *filename, void *buf, size_t maxsz) FAST_FUNC;
785// Reads one line a-la fgets (but doesn't save terminating '\n').
786// Reads byte-by-byte. Useful when it is important to not read ahead.
787// Bytes are appended to pfx (which must be malloced, or NULL).
788extern char *xmalloc_reads(int fd, size_t *maxsz_p) FAST_FUNC;
789/* Reads block up to *maxsz_p (default: INT_MAX - 4095) */
790extern void *xmalloc_read(int fd, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
791/* Returns NULL if file can't be opened (default max size: INT_MAX - 4095) */
792extern void *xmalloc_open_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
793/* Never returns NULL */
794extern void *xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
795
796#if defined(ARG_MAX) && (ARG_MAX >= 60*1024 || !defined(_SC_ARG_MAX))
797/* Use _constant_ maximum if: defined && (big enough || no variable one exists) */
798# define bb_arg_max() ((unsigned)ARG_MAX)
799#elif defined(_SC_ARG_MAX)
800/* Else use variable one (a bit more expensive) */
801unsigned bb_arg_max(void) FAST_FUNC;
802#else
803/* If all else fails */
804# define bb_arg_max() ((unsigned)(32 * 1024))
805#endif
806unsigned bb_clk_tck(void) FAST_FUNC;
807
808#define SEAMLESS_COMPRESSION (0 \
809 || ENABLE_FEATURE_SEAMLESS_XZ \
810 || ENABLE_FEATURE_SEAMLESS_LZMA \
811 || ENABLE_FEATURE_SEAMLESS_BZ2 \
812 || ENABLE_FEATURE_SEAMLESS_GZ \
813 || ENABLE_FEATURE_SEAMLESS_Z)
814
815#if SEAMLESS_COMPRESSION
816/* Autodetects gzip/bzip2 formats. fd may be in the middle of the file! */
817extern int setup_unzip_on_fd(int fd, int fail_if_not_compressed) FAST_FUNC;
818/* Autodetects .gz etc */
819extern int open_zipped(const char *fname, int fail_if_not_compressed) FAST_FUNC;
820extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
821#else
822# define setup_unzip_on_fd(...) (0)
823# define open_zipped(fname, fail_if_not_compressed) open((fname), O_RDONLY);
824# define xmalloc_open_zipped_read_close(fname, maxsz_p) xmalloc_open_read_close((fname), (maxsz_p))
825#endif
826
827extern ssize_t safe_write(int fd, const void *buf, size_t count) FAST_FUNC;
828// NB: will return short write on error, not -1,
829// if some data was written before error occurred
830extern ssize_t full_write(int fd, const void *buf, size_t count) FAST_FUNC;
831extern void xwrite(int fd, const void *buf, size_t count) FAST_FUNC;
832extern void xwrite_str(int fd, const char *str) FAST_FUNC;
833extern ssize_t full_write1_str(const char *str) FAST_FUNC;
834extern ssize_t full_write2_str(const char *str) FAST_FUNC;
835extern void xopen_xwrite_close(const char* file, const char *str) FAST_FUNC;
836
837/* Close fd, but check for failures (some types of write errors) */
838extern void xclose(int fd) FAST_FUNC;
839
840/* Reads and prints to stdout till eof, then closes FILE. Exits on error: */
841extern void xprint_and_close_file(FILE *file) FAST_FUNC;
842
843/* Reads a line from a text file, up to a newline or NUL byte, inclusive.
844 * Returns malloc'ed char*. If end is NULL '\n' isn't considered
845 * end of line. If end isn't NULL, length of the chunk is stored in it.
846 * Returns NULL if EOF/error.
847 */
848extern char *bb_get_chunk_from_file(FILE *file, int *end) FAST_FUNC;
849/* Reads up to (and including) TERMINATING_STRING: */
850extern char *xmalloc_fgets_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC;
851/* Same, with limited max size, and returns the length (excluding NUL): */
852extern char *xmalloc_fgets_str_len(FILE *file, const char *terminating_string, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
853/* Chops off TERMINATING_STRING from the end: */
854extern char *xmalloc_fgetline_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC;
855/* Reads up to (and including) "\n" or NUL byte: */
856extern char *xmalloc_fgets(FILE *file) FAST_FUNC RETURNS_MALLOC;
857/* Chops off '\n' from the end, unlike fgets: */
858extern char *xmalloc_fgetline(FILE *file) FAST_FUNC RETURNS_MALLOC;
859/* Same, but doesn't try to conserve space (may have some slack after the end) */
860/* extern char *xmalloc_fgetline_fast(FILE *file) FAST_FUNC RETURNS_MALLOC; */
861
862void die_if_ferror(FILE *file, const char *msg) FAST_FUNC;
863void die_if_ferror_stdout(void) FAST_FUNC;
864int fflush_all(void) FAST_FUNC;
865void fflush_stdout_and_exit(int retval) NORETURN FAST_FUNC;
866int fclose_if_not_stdin(FILE *file) FAST_FUNC;
867FILE* xfopen(const char *filename, const char *mode) FAST_FUNC;
868/* Prints warning to stderr and returns NULL on failure: */
869FILE* fopen_or_warn(const char *filename, const char *mode) FAST_FUNC;
870/* "Opens" stdin if filename is special, else just opens file: */
871FILE* xfopen_stdin(const char *filename) FAST_FUNC;
872FILE* fopen_or_warn_stdin(const char *filename) FAST_FUNC;
873FILE* fopen_for_read(const char *path) FAST_FUNC;
874FILE* xfopen_for_read(const char *path) FAST_FUNC;
875FILE* fopen_for_write(const char *path) FAST_FUNC;
876FILE* xfopen_for_write(const char *path) FAST_FUNC;
877FILE* xfdopen_for_read(int fd) FAST_FUNC;
878FILE* xfdopen_for_write(int fd) FAST_FUNC;
879
880int bb_pstrcmp(const void *a, const void *b) /* not FAST_FUNC! */;
881void qsort_string_vector(char **sv, unsigned count) FAST_FUNC;
882
883/* Wrapper which restarts poll on EINTR or ENOMEM.
884 * On other errors complains [perror("poll")] and returns.
885 * Warning! May take (much) longer than timeout_ms to return!
886 * If this is a problem, use bare poll and open-code EINTR/ENOMEM handling */
887int safe_poll(struct pollfd *ufds, nfds_t nfds, int timeout_ms) FAST_FUNC;
888
889char *safe_gethostname(void) FAST_FUNC;
890
891/* Convert each alpha char in str to lower-case */
892char* str_tolower(char *str) FAST_FUNC;
893
894char *utoa(unsigned n) FAST_FUNC;
895char *itoa(int n) FAST_FUNC;
896/* Returns a pointer past the formatted number, does NOT null-terminate */
897char *utoa_to_buf(unsigned n, char *buf, unsigned buflen) FAST_FUNC;
898char *itoa_to_buf(int n, char *buf, unsigned buflen) FAST_FUNC;
899/* Intelligent formatters of bignums */
900char *smart_ulltoa4(unsigned long long ul, char buf[4], const char *scale) FAST_FUNC;
901char *smart_ulltoa5(unsigned long long ul, char buf[5], const char *scale) FAST_FUNC;
902/* If block_size == 0, display size without fractional part,
903 * else display (size * block_size) with one decimal digit.
904 * If display_unit == 0, show value no bigger than 1024 with suffix (K,M,G...),
905 * else divide by display_unit and do not use suffix. */
906#define HUMAN_READABLE_MAX_WIDTH 7 /* "1024.0G" */
907#define HUMAN_READABLE_MAX_WIDTH_STR "7"
908//TODO: provide pointer to buf (avoid statics)?
909const char *make_human_readable_str(unsigned long long size,
910 unsigned long block_size, unsigned long display_unit) FAST_FUNC;
911/* Put a string of hex bytes ("1b2e66fe"...), return advanced pointer */
912char *bin2hex(char *dst, const char *src, int count) FAST_FUNC;
913/* Reverse */
914char* hex2bin(char *dst, const char *src, int count) FAST_FUNC;
915
916/* Generate a UUID */
917void generate_uuid(uint8_t *buf) FAST_FUNC;
918
919/* Last element is marked by mult == 0 */
920struct suffix_mult {
921 char suffix[4];
922 unsigned mult;
923};
924extern const struct suffix_mult bkm_suffixes[];
925#define km_suffixes (bkm_suffixes + 1)
926extern const struct suffix_mult cwbkMG_suffixes[];
927#define kMG_suffixes (cwbkMG_suffixes + 3)
928
929#include "xatonum.h"
930/* Specialized: */
931
932/* Using xatoi() instead of naive atoi() is not always convenient -
933 * in many places people want *non-negative* values, but store them
934 * in signed int. Therefore we need this one:
935 * dies if input is not in [0, INT_MAX] range. Also will reject '-0' etc.
936 * It should really be named xatoi_nonnegative (since it allows 0),
937 * but that would be too long.
938 */
939int xatoi_positive(const char *numstr) FAST_FUNC;
940
941/* Useful for reading port numbers */
942uint16_t xatou16(const char *numstr) FAST_FUNC;
943
944
945/* These parse entries in /etc/passwd and /etc/group. This is desirable
946 * for BusyBox since we want to avoid using the glibc NSS stuff, which
947 * increases target size and is often not needed on embedded systems. */
948long xuname2uid(const char *name) FAST_FUNC;
949long xgroup2gid(const char *name) FAST_FUNC;
950/* wrapper: allows string to contain numeric uid or gid */
951unsigned long get_ug_id(const char *s, long FAST_FUNC (*xname2id)(const char *)) FAST_FUNC;
952struct bb_uidgid_t {
953 uid_t uid;
954 gid_t gid;
955};
956/* always sets uid and gid; returns 0 on failure */
957int get_uidgid(struct bb_uidgid_t*, const char*) FAST_FUNC;
958/* always sets uid and gid; exits on failure */
959void xget_uidgid(struct bb_uidgid_t*, const char*) FAST_FUNC;
960/* chown-like handling of "user[:[group]" */
961void parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group) FAST_FUNC;
962struct passwd* xgetpwnam(const char *name) FAST_FUNC;
963struct group* xgetgrnam(const char *name) FAST_FUNC;
964struct passwd* xgetpwuid(uid_t uid) FAST_FUNC;
965struct group* xgetgrgid(gid_t gid) FAST_FUNC;
966char* xuid2uname(uid_t uid) FAST_FUNC;
967char* xgid2group(gid_t gid) FAST_FUNC;
968char* uid2uname(uid_t uid) FAST_FUNC;
969char* gid2group(gid_t gid) FAST_FUNC;
970char* uid2uname_utoa(uid_t uid) FAST_FUNC;
971char* gid2group_utoa(gid_t gid) FAST_FUNC;
972/* versions which cache results (useful for ps, ls etc) */
973const char* get_cached_username(uid_t uid) FAST_FUNC;
974const char* get_cached_groupname(gid_t gid) FAST_FUNC;
975void clear_username_cache(void) FAST_FUNC;
976/* internally usernames are saved in fixed-sized char[] buffers */
977enum { USERNAME_MAX_SIZE = 32 - sizeof(uid_t) };
978#if ENABLE_FEATURE_CHECK_NAMES
979void die_if_bad_username(const char* name) FAST_FUNC;
980#else
981#define die_if_bad_username(name) ((void)(name))
982#endif
983
984#if ENABLE_FEATURE_UTMP
985void FAST_FUNC write_new_utmp(pid_t pid, int new_type, const char *tty_name, const char *username, const char *hostname);
986void FAST_FUNC update_utmp(pid_t pid, int new_type, const char *tty_name, const char *username, const char *hostname);
987void FAST_FUNC update_utmp_DEAD_PROCESS(pid_t pid);
988#else
989# define write_new_utmp(pid, new_type, tty_name, username, hostname) ((void)0)
990# define update_utmp(pid, new_type, tty_name, username, hostname) ((void)0)
991# define update_utmp_DEAD_PROCESS(pid) ((void)0)
992#endif
993
994
995int file_is_executable(const char *name) FAST_FUNC;
996char *find_executable(const char *filename, char **PATHp) FAST_FUNC;
997int executable_exists(const char *filename) FAST_FUNC;
998
999/* BB_EXECxx always execs (it's not doing NOFORK/NOEXEC stuff),
1000 * but it may exec busybox and call applet instead of searching PATH.
1001 */
1002#if ENABLE_FEATURE_PREFER_APPLETS
1003int BB_EXECVP(const char *file, char *const argv[]) FAST_FUNC;
1004#define BB_EXECLP(prog,cmd,...) \
1005 do { \
1006 if (find_applet_by_name(prog) >= 0) \
1007 execlp(bb_busybox_exec_path, cmd, __VA_ARGS__); \
1008 execlp(prog, cmd, __VA_ARGS__); \
1009 } while (0)
1010#else
1011#define BB_EXECVP(prog,cmd) execvp(prog,cmd)
1012#define BB_EXECLP(prog,cmd,...) execlp(prog,cmd,__VA_ARGS__)
1013#endif
1014void BB_EXECVP_or_die(char **argv) NORETURN FAST_FUNC;
1015void exec_prog_or_SHELL(char **argv) NORETURN FAST_FUNC;
1016
1017/* xvfork() can't be a _function_, return after vfork in child mangles stack
1018 * in the parent. It must be a macro. */
1019#define xvfork() \
1020({ \
1021 pid_t bb__xvfork_pid = vfork(); \
1022 if (bb__xvfork_pid < 0) \
1023 bb_perror_msg_and_die("vfork"); \
1024 bb__xvfork_pid; \
1025})
1026#if BB_MMU
1027pid_t xfork(void) FAST_FUNC;
1028#endif
1029void xvfork_parent_waits_and_exits(void) FAST_FUNC;
1030
1031/* NOMMU friendy fork+exec: */
1032pid_t spawn(char **argv) FAST_FUNC;
1033pid_t xspawn(char **argv) FAST_FUNC;
1034
1035pid_t safe_waitpid(pid_t pid, int *wstat, int options) FAST_FUNC;
1036pid_t wait_any_nohang(int *wstat) FAST_FUNC;
1037/* wait4pid: unlike waitpid, waits ONLY for one process.
1038 * Returns sig + 0x180 if child is killed by signal.
1039 * It's safe to pass negative 'pids' from failed [v]fork -
1040 * wait4pid will return -1 (and will not clobber [v]fork's errno).
1041 * IOW: rc = wait4pid(spawn(argv));
1042 * if (rc < 0) bb_perror_msg("%s", argv[0]);
1043 * if (rc > 0) bb_error_msg("exit code: %d", rc & 0xff);
1044 */
1045int wait4pid(pid_t pid) FAST_FUNC;
1046int wait_for_exitstatus(pid_t pid) FAST_FUNC;
1047/* Same as wait4pid(spawn(argv)), but with NOFORK/NOEXEC if configured: */
1048int spawn_and_wait(char **argv) FAST_FUNC;
1049/* Does NOT check that applet is NOFORK, just blindly runs it */
1050int run_nofork_applet(int applet_no, char **argv) FAST_FUNC;
1051
1052/* Helpers for daemonization.
1053 *
1054 * bb_daemonize(flags) = daemonize, does not compile on NOMMU
1055 *
1056 * bb_daemonize_or_rexec(flags, argv) = daemonizes on MMU (and ignores argv),
1057 * rexec's itself on NOMMU with argv passed as command line.
1058 * Thus bb_daemonize_or_rexec may cause your <applet>_main() to be re-executed
1059 * from the start. (It will detect it and not reexec again second time).
1060 * You have to audit carefully that you don't do something twice as a result
1061 * (opening files/sockets, parsing config files etc...)!
1062 *
1063 * Both of the above will redirect fd 0,1,2 to /dev/null and drop ctty
1064 * (will do setsid()).
1065 *
1066 * fork_or_rexec(argv) = bare-bones fork on MMU,
1067 * "vfork + re-exec ourself" on NOMMU. No fd redirection, no setsid().
1068 * On MMU ignores argv.
1069 *
1070 * Helper for network daemons in foreground mode:
1071 *
1072 * bb_sanitize_stdio() = make sure that fd 0,1,2 are opened by opening them
1073 * to /dev/null if they are not.
1074 */
1075enum {
1076 DAEMON_CHDIR_ROOT = 1,
1077 DAEMON_DEVNULL_STDIO = 2,
1078 DAEMON_CLOSE_EXTRA_FDS = 4,
1079 DAEMON_ONLY_SANITIZE = 8, /* internal use */
1080 DAEMON_DOUBLE_FORK = 16, /* double fork to avoid controlling tty */
1081};
1082#if BB_MMU
1083 enum { re_execed = 0 };
1084# define fork_or_rexec(argv) xfork()
1085# define bb_daemonize_or_rexec(flags, argv) bb_daemonize_or_rexec(flags)
1086# define bb_daemonize(flags) bb_daemonize_or_rexec(flags, bogus)
1087#else
1088 extern bool re_execed;
1089 /* Note: re_exec() and fork_or_rexec() do argv[0][0] |= 0x80 on NOMMU!
1090 * _Parent_ needs to undo it if it doesn't want to have argv[0] mangled.
1091 */
1092 void re_exec(char **argv) NORETURN FAST_FUNC;
1093 pid_t fork_or_rexec(char **argv) FAST_FUNC;
1094 int BUG_fork_is_unavailable_on_nommu(void) FAST_FUNC;
1095 int BUG_daemon_is_unavailable_on_nommu(void) FAST_FUNC;
1096 void BUG_bb_daemonize_is_unavailable_on_nommu(void) FAST_FUNC;
1097# define fork() BUG_fork_is_unavailable_on_nommu()
1098# define xfork() BUG_fork_is_unavailable_on_nommu()
1099# define daemon(a,b) BUG_daemon_is_unavailable_on_nommu()
1100# define bb_daemonize(a) BUG_bb_daemonize_is_unavailable_on_nommu()
1101#endif
1102void bb_daemonize_or_rexec(int flags, char **argv) FAST_FUNC;
1103void bb_sanitize_stdio(void) FAST_FUNC;
1104/* Clear dangerous stuff, set PATH. Return 1 if was run by different user. */
1105int sanitize_env_if_suid(void) FAST_FUNC;
1106
1107
1108char* single_argv(char **argv) FAST_FUNC;
1109extern const char *const bb_argv_dash[]; /* "-", NULL */
1110extern const char *opt_complementary;
1111#if ENABLE_LONG_OPTS || ENABLE_FEATURE_GETOPT_LONG
1112#define No_argument "\0"
1113#define Required_argument "\001"
1114#define Optional_argument "\002"
1115extern const char *applet_long_options;
1116#endif
1117extern uint32_t option_mask32;
1118extern uint32_t getopt32(char **argv, const char *applet_opts, ...) FAST_FUNC;
1119
1120
1121/* Having next pointer as a first member allows easy creation
1122 * of "llist-compatible" structs, and using llist_FOO functions
1123 * on them.
1124 */
1125typedef struct llist_t {
1126 struct llist_t *link;
1127 char *data;
1128} llist_t;
1129void llist_add_to(llist_t **old_head, void *data) FAST_FUNC;
1130void llist_add_to_end(llist_t **list_head, void *data) FAST_FUNC;
1131void *llist_pop(llist_t **elm) FAST_FUNC;
1132void llist_unlink(llist_t **head, llist_t *elm) FAST_FUNC;
1133void llist_free(llist_t *elm, void (*freeit)(void *data)) FAST_FUNC;
1134llist_t *llist_rev(llist_t *list) FAST_FUNC;
1135llist_t *llist_find_str(llist_t *first, const char *str) FAST_FUNC;
1136/* BTW, surprisingly, changing API to
1137 * llist_t *llist_add_to(llist_t *old_head, void *data)
1138 * etc does not result in smaller code... */
1139
1140/* start_stop_daemon and udhcpc are special - they want
1141 * to create pidfiles regardless of FEATURE_PIDFILE */
1142#if ENABLE_FEATURE_PIDFILE || defined(WANT_PIDFILE)
1143/* True only if we created pidfile which is *file*, not /dev/null etc */
1144extern smallint wrote_pidfile;
1145void write_pidfile(const char *path) FAST_FUNC;
1146#define remove_pidfile(path) do { if (wrote_pidfile) unlink(path); } while (0)
1147#else
1148enum { wrote_pidfile = 0 };
1149#define write_pidfile(path) ((void)0)
1150#define remove_pidfile(path) ((void)0)
1151#endif
1152
1153enum {
1154 LOGMODE_NONE = 0,
1155 LOGMODE_STDIO = (1 << 0),
1156 LOGMODE_SYSLOG = (1 << 1) * ENABLE_FEATURE_SYSLOG,
1157 LOGMODE_BOTH = LOGMODE_SYSLOG + LOGMODE_STDIO,
1158};
1159extern const char *msg_eol;
1160extern smallint syslog_level;
1161extern smallint logmode;
1162extern uint8_t xfunc_error_retval;
1163extern void (*die_func)(void);
1164extern void xfunc_die(void) NORETURN FAST_FUNC;
1165extern void bb_show_usage(void) NORETURN FAST_FUNC;
1166extern void bb_error_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
1167extern void bb_error_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
1168extern void bb_perror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
1169extern void bb_simple_perror_msg(const char *s) FAST_FUNC;
1170extern void bb_perror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
1171extern void bb_simple_perror_msg_and_die(const char *s) NORETURN FAST_FUNC;
1172extern void bb_herror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
1173extern void bb_herror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
1174extern void bb_perror_nomsg_and_die(void) NORETURN FAST_FUNC;
1175extern void bb_perror_nomsg(void) FAST_FUNC;
1176extern void bb_verror_msg(const char *s, va_list p, const char *strerr) FAST_FUNC;
1177extern void bb_logenv_override(void) FAST_FUNC;
1178
1179/* We need to export XXX_main from libbusybox
1180 * only if we build "individual" binaries
1181 */
1182#if ENABLE_FEATURE_INDIVIDUAL
1183#define MAIN_EXTERNALLY_VISIBLE EXTERNALLY_VISIBLE
1184#else
1185#define MAIN_EXTERNALLY_VISIBLE
1186#endif
1187
1188
1189/* Applets which are useful from another applets */
1190int bb_cat(char** argv);
1191/* If shell needs them, they exist even if not enabled as applets */
1192int echo_main(int argc, char** argv) IF_ECHO(MAIN_EXTERNALLY_VISIBLE);
1193int printf_main(int argc, char **argv) IF_PRINTF(MAIN_EXTERNALLY_VISIBLE);
1194int test_main(int argc, char **argv)
1195#if ENABLE_TEST || ENABLE_TEST1 || ENABLE_TEST2
1196 MAIN_EXTERNALLY_VISIBLE
1197#endif
1198;
1199int kill_main(int argc, char **argv)
1200#if ENABLE_KILL || ENABLE_KILLALL || ENABLE_KILLALL5
1201 MAIN_EXTERNALLY_VISIBLE
1202#endif
1203;
1204/* Similar, but used by chgrp, not shell */
1205int chown_main(int argc, char **argv) IF_CHOWN(MAIN_EXTERNALLY_VISIBLE);
1206/* Used by ftpd */
1207int ls_main(int argc, char **argv) IF_LS(MAIN_EXTERNALLY_VISIBLE);
1208/* Don't need IF_xxx() guard for these */
1209int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1210int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1211
1212#if ENABLE_ROUTE
1213void bb_displayroutes(int noresolve, int netstatfmt) FAST_FUNC;
1214#endif
1215
1216
1217/* Networking */
1218/* This structure defines protocol families and their handlers. */
1219struct aftype {
1220 const char *name;
1221 const char *title;
1222 int af;
1223 int alen;
1224 char* FAST_FUNC (*print)(unsigned char *);
1225 const char* FAST_FUNC (*sprint)(struct sockaddr *, int numeric);
1226 int FAST_FUNC (*input)(/*int type,*/ const char *bufp, struct sockaddr *);
1227 void FAST_FUNC (*herror)(char *text);
1228 int FAST_FUNC (*rprint)(int options);
1229 int FAST_FUNC (*rinput)(int typ, int ext, char **argv);
1230 /* may modify src */
1231 int FAST_FUNC (*getmask)(char *src, struct sockaddr *mask, char *name);
1232};
1233/* This structure defines hardware protocols and their handlers. */
1234struct hwtype {
1235 const char *name;
1236 const char *title;
1237 int type;
1238 int alen;
1239 char* FAST_FUNC (*print)(unsigned char *);
1240 int FAST_FUNC (*input)(const char *, struct sockaddr *);
1241 int FAST_FUNC (*activate)(int fd);
1242 int suppress_null_addr;
1243};
1244extern smallint interface_opt_a;
1245int display_interfaces(char *ifname) FAST_FUNC;
1246int in_ether(const char *bufp, struct sockaddr *sap) FAST_FUNC;
1247#if ENABLE_FEATURE_HWIB
1248int in_ib(const char *bufp, struct sockaddr *sap) FAST_FUNC;
1249#else
1250#define in_ib(a, b) 1 /* fail */
1251#endif
1252const struct aftype *get_aftype(const char *name) FAST_FUNC;
1253const struct hwtype *get_hwtype(const char *name) FAST_FUNC;
1254const struct hwtype *get_hwntype(int type) FAST_FUNC;
1255
1256
1257#ifndef BUILD_INDIVIDUAL
1258extern int find_applet_by_name(const char *name) FAST_FUNC;
1259extern void run_applet_no_and_exit(int a, char **argv) NORETURN FAST_FUNC;
1260#endif
1261
1262#ifdef HAVE_MNTENT_H
1263extern int match_fstype(const struct mntent *mt, const char *fstypes) FAST_FUNC;
1264extern struct mntent *find_mount_point(const char *name, int subdir_too) FAST_FUNC;
1265#endif
1266extern void erase_mtab(const char * name) FAST_FUNC;
1267extern unsigned int tty_baud_to_value(speed_t speed) FAST_FUNC;
1268extern speed_t tty_value_to_baud(unsigned int value) FAST_FUNC;
1269#if ENABLE_DESKTOP
1270extern void bb_warn_ignoring_args(char *arg) FAST_FUNC;
1271#else
1272# define bb_warn_ignoring_args(arg) ((void)0)
1273#endif
1274
1275extern int get_linux_version_code(void) FAST_FUNC;
1276
1277extern char *query_loop(const char *device) FAST_FUNC;
1278extern int del_loop(const char *device) FAST_FUNC;
1279/* If *devname is not NULL, use that name, otherwise try to find free one,
1280 * malloc and return it in *devname.
1281 * return value: 1: read-only loopdev was setup, 0: rw, < 0: error */
1282extern int set_loop(char **devname, const char *file, unsigned long long offset, int ro) FAST_FUNC;
1283
1284/* Like bb_ask below, but asks on stdin with no timeout. */
1285char *bb_ask_stdin(const char * prompt) FAST_FUNC;
1286//TODO: pass buf pointer or return allocated buf (avoid statics)?
1287char *bb_ask(const int fd, int timeout, const char * prompt) FAST_FUNC;
1288int bb_ask_confirmation(void) FAST_FUNC;
1289
1290/* Returns -1 if input is invalid. current_mode is a base for e.g. "u+rw" */
1291int bb_parse_mode(const char* s, unsigned cur_mode) FAST_FUNC;
1292
1293/*
1294 * Config file parser
1295 */
1296enum {
1297 PARSE_COLLAPSE = 0x00010000, // treat consecutive delimiters as one
1298 PARSE_TRIM = 0x00020000, // trim leading and trailing delimiters
1299// TODO: COLLAPSE and TRIM seem to always go in pair
1300 PARSE_GREEDY = 0x00040000, // last token takes entire remainder of the line
1301 PARSE_MIN_DIE = 0x00100000, // die if < min tokens found
1302 // keep a copy of current line
1303 PARSE_KEEP_COPY = 0x00200000 * ENABLE_FEATURE_CROND_D,
1304 PARSE_EOL_COMMENTS = 0x00400000, // comments are recognized even if they aren't the first char
1305 // NORMAL is:
1306 // * remove leading and trailing delimiters and collapse
1307 // multiple delimiters into one
1308 // * warn and continue if less than mintokens delimiters found
1309 // * grab everything into last token
1310 // * comments are recognized even if they aren't the first char
1311 PARSE_NORMAL = PARSE_COLLAPSE | PARSE_TRIM | PARSE_GREEDY | PARSE_EOL_COMMENTS,
1312};
1313typedef struct parser_t {
1314 FILE *fp;
1315 char *data;
1316 char *line, *nline;
1317 size_t line_alloc, nline_alloc;
1318 int lineno;
1319} parser_t;
1320parser_t* config_open(const char *filename) FAST_FUNC;
1321parser_t* config_open2(const char *filename, FILE* FAST_FUNC (*fopen_func)(const char *path)) FAST_FUNC;
1322/* delims[0] is a comment char (use '\0' to disable), the rest are token delimiters */
1323int config_read(parser_t *parser, char **tokens, unsigned flags, const char *delims) FAST_FUNC;
1324#define config_read(parser, tokens, max, min, str, flags) \
1325 config_read(parser, tokens, ((flags) | (((min) & 0xFF) << 8) | ((max) & 0xFF)), str)
1326void config_close(parser_t *parser) FAST_FUNC;
1327
1328/* Concatenate path and filename to new allocated buffer.
1329 * Add "/" only as needed (no duplicate "//" are produced).
1330 * If path is NULL, it is assumed to be "/".
1331 * filename should not be NULL. */
1332char *concat_path_file(const char *path, const char *filename) FAST_FUNC;
1333/* Returns NULL on . and .. */
1334char *concat_subpath_file(const char *path, const char *filename) FAST_FUNC;
1335
1336
1337int bb_make_directory(char *path, long mode, int flags) FAST_FUNC;
1338
1339int get_signum(const char *name) FAST_FUNC;
1340const char *get_signame(int number) FAST_FUNC;
1341void print_signames(void) FAST_FUNC;
1342
1343char *bb_simplify_path(const char *path) FAST_FUNC;
1344/* Returns ptr to NUL */
1345char *bb_simplify_abs_path_inplace(char *path) FAST_FUNC;
1346
1347#ifndef LOGIN_FAIL_DELAY
1348#define LOGIN_FAIL_DELAY 3
1349#endif
1350extern void bb_do_delay(int seconds) FAST_FUNC;
1351extern void change_identity(const struct passwd *pw) FAST_FUNC;
1352extern void run_shell(const char *shell, int loginshell, const char **args) NORETURN FAST_FUNC;
1353
1354/* Returns $SHELL, getpwuid(getuid())->pw_shell, or DEFAULT_SHELL.
1355 * Note that getpwuid result might need xstrdup'ing
1356 * if there is a possibility of intervening getpwxxx() calls.
1357 */
1358const char *get_shell_name(void) FAST_FUNC;
1359
1360#if ENABLE_SELINUX
1361extern void renew_current_security_context(void) FAST_FUNC;
1362extern void set_current_security_context(security_context_t sid) FAST_FUNC;
1363extern context_t set_security_context_component(security_context_t cur_context,
1364 char *user, char *role, char *type, char *range) FAST_FUNC;
1365extern void setfscreatecon_or_die(security_context_t scontext) FAST_FUNC;
1366extern void selinux_preserve_fcontext(int fdesc) FAST_FUNC;
1367#else
1368#define selinux_preserve_fcontext(fdesc) ((void)0)
1369#endif
1370extern void selinux_or_die(void) FAST_FUNC;
1371
1372
1373/* setup_environment:
1374 * if chdir pw->pw_dir: ok: else if to_tmp == 1: goto /tmp else: goto / or die
1375 * if clear_env = 1: cd(pw->pw_dir), clear environment, then set
1376 * TERM=(old value)
1377 * USER=pw->pw_name, LOGNAME=pw->pw_name
1378 * PATH=bb_default_[root_]path
1379 * HOME=pw->pw_dir
1380 * SHELL=shell
1381 * else if change_env = 1:
1382 * if not root (if pw->pw_uid != 0):
1383 * USER=pw->pw_name, LOGNAME=pw->pw_name
1384 * HOME=pw->pw_dir
1385 * SHELL=shell
1386 * else does nothing
1387 */
1388#define SETUP_ENV_CHANGEENV (1 << 0)
1389#define SETUP_ENV_CLEARENV (1 << 1)
1390#define SETUP_ENV_TO_TMP (1 << 2)
1391#define SETUP_ENV_NO_CHDIR (1 << 4)
1392void setup_environment(const char *shell, int flags, const struct passwd *pw) FAST_FUNC;
1393void nuke_str(char *str) FAST_FUNC;
1394int check_password(const struct passwd *pw, const char *plaintext) FAST_FUNC;
1395int ask_and_check_password_extended(const struct passwd *pw, int timeout, const char *prompt) FAST_FUNC;
1396int ask_and_check_password(const struct passwd *pw) FAST_FUNC;
1397/* Returns a malloced string */
1398#if !ENABLE_USE_BB_CRYPT
1399#define pw_encrypt(clear, salt, cleanup) pw_encrypt(clear, salt)
1400#endif
1401extern char *pw_encrypt(const char *clear, const char *salt, int cleanup) FAST_FUNC;
1402extern int obscure(const char *old, const char *newval, const struct passwd *pwdp) FAST_FUNC;
1403/*
1404 * rnd is additional random input. New one is returned.
1405 * Useful if you call crypt_make_salt many times in a row:
1406 * rnd = crypt_make_salt(buf1, 4, 0);
1407 * rnd = crypt_make_salt(buf2, 4, rnd);
1408 * rnd = crypt_make_salt(buf3, 4, rnd);
1409 * (otherwise we risk having same salt generated)
1410 */
1411extern int crypt_make_salt(char *p, int cnt /*, int rnd*/) FAST_FUNC;
1412/* "$N$" + sha_salt_16_bytes + NUL */
1413#define MAX_PW_SALT_LEN (3 + 16 + 1)
1414extern char* crypt_make_pw_salt(char p[MAX_PW_SALT_LEN], const char *algo) FAST_FUNC;
1415
1416
1417/* Returns number of lines changed, or -1 on error */
1418#if !(ENABLE_FEATURE_ADDUSER_TO_GROUP || ENABLE_FEATURE_DEL_USER_FROM_GROUP)
1419#define update_passwd(filename, username, data, member) \
1420 update_passwd(filename, username, data)
1421#endif
1422extern int update_passwd(const char *filename,
1423 const char *username,
1424 const char *data,
1425 const char *member) FAST_FUNC;
1426
1427int index_in_str_array(const char *const string_array[], const char *key) FAST_FUNC;
1428int index_in_strings(const char *strings, const char *key) FAST_FUNC;
1429int index_in_substr_array(const char *const string_array[], const char *key) FAST_FUNC;
1430int index_in_substrings(const char *strings, const char *key) FAST_FUNC;
1431const char *nth_string(const char *strings, int n) FAST_FUNC;
1432
1433extern void print_login_issue(const char *issue_file, const char *tty) FAST_FUNC;
1434extern void print_login_prompt(void) FAST_FUNC;
1435
1436char *xmalloc_ttyname(int fd) FAST_FUNC RETURNS_MALLOC;
1437/* NB: typically you want to pass fd 0, not 1. Think 'applet | grep something' */
1438int get_terminal_width_height(int fd, unsigned *width, unsigned *height) FAST_FUNC;
1439int get_terminal_width(int fd) FAST_FUNC;
1440
1441int tcsetattr_stdin_TCSANOW(const struct termios *tp) FAST_FUNC;
1442
1443/* NB: "unsigned request" is crucial! "int request" will break some arches! */
1444int ioctl_or_perror(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
1445int ioctl_or_perror_and_die(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
1446#if ENABLE_IOCTL_HEX2STR_ERROR
1447int bb_ioctl_or_warn(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC;
1448int bb_xioctl(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC;
1449#define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp,#request)
1450#define xioctl(fd,request,argp) bb_xioctl(fd,request,argp,#request)
1451#else
1452int bb_ioctl_or_warn(int fd, unsigned request, void *argp) FAST_FUNC;
1453int bb_xioctl(int fd, unsigned request, void *argp) FAST_FUNC;
1454#define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp)
1455#define xioctl(fd,request,argp) bb_xioctl(fd,request,argp)
1456#endif
1457
1458char *is_in_ino_dev_hashtable(const struct stat *statbuf) FAST_FUNC;
1459void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name) FAST_FUNC;
1460void reset_ino_dev_hashtable(void) FAST_FUNC;
1461#ifdef __GLIBC__
1462/* At least glibc has horrendously large inline for this, so wrap it */
1463unsigned long long bb_makedev(unsigned major, unsigned minor) FAST_FUNC;
1464#undef makedev
1465#define makedev(a,b) bb_makedev(a,b)
1466#endif
1467
1468
1469/* "Keycodes" that report an escape sequence.
1470 * We use something which fits into signed char,
1471 * yet doesn't represent any valid Unicode character.
1472 * Also, -1 is reserved for error indication and we don't use it. */
1473enum {
1474 KEYCODE_UP = -2,
1475 KEYCODE_DOWN = -3,
1476 KEYCODE_RIGHT = -4,
1477 KEYCODE_LEFT = -5,
1478 KEYCODE_HOME = -6,
1479 KEYCODE_END = -7,
1480 KEYCODE_INSERT = -8,
1481 KEYCODE_DELETE = -9,
1482 KEYCODE_PAGEUP = -10,
1483 KEYCODE_PAGEDOWN = -11,
1484 KEYCODE_BACKSPACE = -12, /* Used only if Alt/Ctrl/Shifted */
1485 KEYCODE_D = -13, /* Used only if Alted */
1486#if 0
1487 KEYCODE_FUN1 = ,
1488 KEYCODE_FUN2 = ,
1489 KEYCODE_FUN3 = ,
1490 KEYCODE_FUN4 = ,
1491 KEYCODE_FUN5 = ,
1492 KEYCODE_FUN6 = ,
1493 KEYCODE_FUN7 = ,
1494 KEYCODE_FUN8 = ,
1495 KEYCODE_FUN9 = ,
1496 KEYCODE_FUN10 = ,
1497 KEYCODE_FUN11 = ,
1498 KEYCODE_FUN12 = ,
1499#endif
1500 /* ^^^^^ Be sure that last defined value is small enough.
1501 * Current read_key() code allows going up to -32 (0xfff..fffe0).
1502 * This gives three upper bits in LSB to play with:
1503 * KEYCODE_foo values are 0xfff..fffXX, lowest XX bits are: scavvvvv,
1504 * s=0 if SHIFT, c=0 if CTRL, a=0 if ALT,
1505 * vvvvv bits are the same for same key regardless of "shift bits".
1506 */
1507 //KEYCODE_SHIFT_... = KEYCODE_... & ~0x80,
1508 KEYCODE_CTRL_RIGHT = KEYCODE_RIGHT & ~0x40,
1509 KEYCODE_CTRL_LEFT = KEYCODE_LEFT & ~0x40,
1510 KEYCODE_ALT_RIGHT = KEYCODE_RIGHT & ~0x20,
1511 KEYCODE_ALT_LEFT = KEYCODE_LEFT & ~0x20,
1512 KEYCODE_ALT_BACKSPACE = KEYCODE_BACKSPACE & ~0x20,
1513 KEYCODE_ALT_D = KEYCODE_D & ~0x20,
1514
1515 KEYCODE_CURSOR_POS = -0x100, /* 0xfff..fff00 */
1516 /* How long is the longest ESC sequence we know?
1517 * We want it big enough to be able to contain
1518 * cursor position sequence "ESC [ 9999 ; 9999 R"
1519 */
1520 KEYCODE_BUFFER_SIZE = 16
1521};
1522/* Note: fd may be in blocking or non-blocking mode, both make sense.
1523 * For one, less uses non-blocking mode.
1524 * Only the first read syscall inside read_key may block indefinitely
1525 * (unless fd is in non-blocking mode),
1526 * subsequent reads will time out after a few milliseconds.
1527 * Return of -1 means EOF or error (errno == 0 on EOF).
1528 * buffer[0] is used as a counter of buffered chars and must be 0
1529 * on first call.
1530 * timeout:
1531 * -2: do not poll for input;
1532 * -1: poll(-1) (i.e. block);
1533 * >=0: poll for TIMEOUT milliseconds, return -1/EAGAIN on timeout
1534 */
1535int64_t read_key(int fd, char *buffer, int timeout) FAST_FUNC;
1536void read_key_ungets(char *buffer, const char *str, unsigned len) FAST_FUNC;
1537
1538
1539#if ENABLE_FEATURE_EDITING
1540/* It's NOT just ENABLEd or disabled. It's a number: */
1541# if defined CONFIG_FEATURE_EDITING_HISTORY && CONFIG_FEATURE_EDITING_HISTORY > 0
1542# define MAX_HISTORY (CONFIG_FEATURE_EDITING_HISTORY + 0)
1543unsigned size_from_HISTFILESIZE(const char *hp) FAST_FUNC;
1544# else
1545# define MAX_HISTORY 0
1546# endif
1547typedef struct line_input_t {
1548 int flags;
1549 const char *path_lookup;
1550# if MAX_HISTORY
1551 int cnt_history;
1552 int cur_history;
1553 int max_history; /* must never be <= 0 */
1554# if ENABLE_FEATURE_EDITING_SAVEHISTORY
1555 /* meaning of this field depends on FEATURE_EDITING_SAVE_ON_EXIT:
1556 * if !FEATURE_EDITING_SAVE_ON_EXIT: "how many lines are
1557 * in on-disk history"
1558 * if FEATURE_EDITING_SAVE_ON_EXIT: "how many in-memory lines are
1559 * also in on-disk history (and thus need to be skipped on save)"
1560 */
1561 unsigned cnt_history_in_file;
1562 const char *hist_file;
1563# endif
1564 char *history[MAX_HISTORY + 1];
1565# endif
1566} line_input_t;
1567enum {
1568 DO_HISTORY = 1 * (MAX_HISTORY > 0),
1569 TAB_COMPLETION = 2 * ENABLE_FEATURE_TAB_COMPLETION,
1570 USERNAME_COMPLETION = 4 * ENABLE_FEATURE_USERNAME_COMPLETION,
1571 VI_MODE = 8 * ENABLE_FEATURE_EDITING_VI,
1572 WITH_PATH_LOOKUP = 0x10,
1573 FOR_SHELL = DO_HISTORY | TAB_COMPLETION | USERNAME_COMPLETION,
1574};
1575line_input_t *new_line_input_t(int flags) FAST_FUNC;
1576/* So far static: void free_line_input_t(line_input_t *n) FAST_FUNC; */
1577/*
1578 * maxsize must be >= 2.
1579 * Returns:
1580 * -1 on read errors or EOF, or on bare Ctrl-D,
1581 * 0 on ctrl-C (the line entered is still returned in 'command'),
1582 * >0 length of input string, including terminating '\n'
1583 */
1584int read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize, int timeout) FAST_FUNC;
1585void show_history(const line_input_t *st) FAST_FUNC;
1586# if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
1587void save_history(line_input_t *st);
1588# endif
1589#else
1590#define MAX_HISTORY 0
1591int read_line_input(const char* prompt, char* command, int maxsize) FAST_FUNC;
1592#define read_line_input(state, prompt, command, maxsize, timeout) \
1593 read_line_input(prompt, command, maxsize)
1594#endif
1595
1596
1597#ifndef COMM_LEN
1598# ifdef TASK_COMM_LEN
1599enum { COMM_LEN = TASK_COMM_LEN };
1600# else
1601/* synchronize with sizeof(task_struct.comm) in /usr/include/linux/sched.h */
1602enum { COMM_LEN = 16 };
1603# endif
1604#endif
1605
1606struct smaprec {
1607 unsigned long mapped_rw;
1608 unsigned long mapped_ro;
1609 unsigned long shared_clean;
1610 unsigned long shared_dirty;
1611 unsigned long private_clean;
1612 unsigned long private_dirty;
1613 unsigned long stack;
1614 unsigned long smap_pss, smap_swap;
1615 unsigned long smap_size;
1616 unsigned long smap_start;
1617 char smap_mode[5];
1618 char *smap_name;
1619};
1620
1621#if !ENABLE_PMAP
1622#define procps_read_smaps(pid, total, cb, data) \
1623 procps_read_smaps(pid, total)
1624#endif
1625int FAST_FUNC procps_read_smaps(pid_t pid, struct smaprec *total,
1626 void (*cb)(struct smaprec *, void *), void *data);
1627
1628typedef struct procps_status_t {
1629 DIR *dir;
1630 IF_FEATURE_SHOW_THREADS(DIR *task_dir;)
1631 uint8_t shift_pages_to_bytes;
1632 uint8_t shift_pages_to_kb;
1633/* Fields are set to 0/NULL if failed to determine (or not requested) */
1634 uint16_t argv_len;
1635 char *argv0;
1636 char *exe;
1637 IF_SELINUX(char *context;)
1638 IF_FEATURE_SHOW_THREADS(unsigned main_thread_pid;)
1639 /* Everything below must contain no ptrs to malloc'ed data:
1640 * it is memset(0) for each process in procps_scan() */
1641 unsigned long vsz, rss; /* we round it to kbytes */
1642 unsigned long stime, utime;
1643 unsigned long start_time;
1644 unsigned pid;
1645 unsigned ppid;
1646 unsigned pgid;
1647 unsigned sid;
1648 unsigned uid;
1649 unsigned gid;
1650#if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
1651 unsigned ruid;
1652 unsigned rgid;
1653 int niceness;
1654#endif
1655 unsigned tty_major,tty_minor;
1656#if ENABLE_FEATURE_TOPMEM
1657 struct smaprec smaps;
1658#endif
1659 char state[4];
1660 /* basename of executable in exec(2), read from /proc/N/stat
1661 * (if executable is symlink or script, it is NOT replaced
1662 * by link target or interpreter name) */
1663 char comm[COMM_LEN];
1664 /* user/group? - use passwd/group parsing functions */
1665#if ENABLE_FEATURE_TOP_SMP_PROCESS
1666 int last_seen_on_cpu;
1667#endif
1668} procps_status_t;
1669/* flag bits for procps_scan(xx, flags) calls */
1670enum {
1671 PSSCAN_PID = 1 << 0,
1672 PSSCAN_PPID = 1 << 1,
1673 PSSCAN_PGID = 1 << 2,
1674 PSSCAN_SID = 1 << 3,
1675 PSSCAN_UIDGID = 1 << 4,
1676 PSSCAN_COMM = 1 << 5,
1677 /* PSSCAN_CMD = 1 << 6, - use read_cmdline instead */
1678 PSSCAN_ARGV0 = 1 << 7,
1679 PSSCAN_EXE = 1 << 8,
1680 PSSCAN_STATE = 1 << 9,
1681 PSSCAN_VSZ = 1 << 10,
1682 PSSCAN_RSS = 1 << 11,
1683 PSSCAN_STIME = 1 << 12,
1684 PSSCAN_UTIME = 1 << 13,
1685 PSSCAN_TTY = 1 << 14,
1686 PSSCAN_SMAPS = (1 << 15) * ENABLE_FEATURE_TOPMEM,
1687 /* NB: used by find_pid_by_name(). Any applet using it
1688 * needs to be mentioned here. */
1689 PSSCAN_ARGVN = (1 << 16) * (ENABLE_KILLALL
1690 || ENABLE_PGREP || ENABLE_PKILL
1691 || ENABLE_PIDOF
1692 || ENABLE_SESTATUS
1693 ),
1694 PSSCAN_CONTEXT = (1 << 17) * ENABLE_SELINUX,
1695 PSSCAN_START_TIME = 1 << 18,
1696 PSSCAN_CPU = (1 << 19) * ENABLE_FEATURE_TOP_SMP_PROCESS,
1697 PSSCAN_NICE = (1 << 20) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS,
1698 PSSCAN_RUIDGID = (1 << 21) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS,
1699 PSSCAN_TASKS = (1 << 22) * ENABLE_FEATURE_SHOW_THREADS,
1700};
1701//procps_status_t* alloc_procps_scan(void) FAST_FUNC;
1702void free_procps_scan(procps_status_t* sp) FAST_FUNC;
1703procps_status_t* procps_scan(procps_status_t* sp, int flags) FAST_FUNC;
1704/* Format cmdline (up to col chars) into char buf[size] */
1705/* Puts [comm] if cmdline is empty (-> process is a kernel thread) */
1706void read_cmdline(char *buf, int size, unsigned pid, const char *comm) FAST_FUNC;
1707pid_t *find_pid_by_name(const char* procName) FAST_FUNC;
1708pid_t *pidlist_reverse(pid_t *pidList) FAST_FUNC;
1709int starts_with_cpu(const char *str) FAST_FUNC;
1710unsigned get_cpu_count(void) FAST_FUNC;
1711
1712
1713/* Use strict=1 if you process input from untrusted source:
1714 * it will return NULL on invalid %xx (bad hex chars)
1715 * and str + 1 if decoded char is / or NUL.
1716 * In non-strict mode, it always succeeds (returns str),
1717 * and also it additionally decoded '+' to space.
1718 */
1719char *percent_decode_in_place(char *str, int strict) FAST_FUNC;
1720
1721
1722extern const char bb_uuenc_tbl_base64[] ALIGN1;
1723extern const char bb_uuenc_tbl_std[] ALIGN1;
1724void bb_uuencode(char *store, const void *s, int length, const char *tbl) FAST_FUNC;
1725enum {
1726 BASE64_FLAG_UU_STOP = 0x100,
1727 /* Sign-extends to a value which never matches fgetc result: */
1728 BASE64_FLAG_NO_STOP_CHAR = 0x80,
1729};
1730const char *decode_base64(char **pp_dst, const char *src) FAST_FUNC;
1731void read_base64(FILE *src_stream, FILE *dst_stream, int flags) FAST_FUNC;
1732
1733typedef struct md5_ctx_t {
1734 uint8_t wbuffer[64]; /* always correctly aligned for uint64_t */
1735 void (*process_block)(struct md5_ctx_t*) FAST_FUNC;
1736 uint64_t total64; /* must be directly before hash[] */
1737 uint32_t hash[8]; /* 4 elements for md5, 5 for sha1, 8 for sha256 */
1738} md5_ctx_t;
1739typedef struct md5_ctx_t sha1_ctx_t;
1740typedef struct md5_ctx_t sha256_ctx_t;
1741typedef struct sha512_ctx_t {
1742 uint64_t total64[2]; /* must be directly before hash[] */
1743 uint64_t hash[8];
1744 uint8_t wbuffer[128]; /* always correctly aligned for uint64_t */
1745} sha512_ctx_t;
1746typedef struct sha3_ctx_t {
1747 uint64_t state[25];
1748 unsigned bytes_queued;
1749 unsigned input_block_bytes;
1750} sha3_ctx_t;
1751void md5_begin(md5_ctx_t *ctx) FAST_FUNC;
1752void md5_hash(md5_ctx_t *ctx, const void *buffer, size_t len) FAST_FUNC;
1753void md5_end(md5_ctx_t *ctx, void *resbuf) FAST_FUNC;
1754void sha1_begin(sha1_ctx_t *ctx) FAST_FUNC;
1755#define sha1_hash md5_hash
1756void sha1_end(sha1_ctx_t *ctx, void *resbuf) FAST_FUNC;
1757void sha256_begin(sha256_ctx_t *ctx) FAST_FUNC;
1758#define sha256_hash md5_hash
1759#define sha256_end sha1_end
1760void sha512_begin(sha512_ctx_t *ctx) FAST_FUNC;
1761void sha512_hash(sha512_ctx_t *ctx, const void *buffer, size_t len) FAST_FUNC;
1762void sha512_end(sha512_ctx_t *ctx, void *resbuf) FAST_FUNC;
1763void sha3_begin(sha3_ctx_t *ctx) FAST_FUNC;
1764void sha3_hash(sha3_ctx_t *ctx, const void *buffer, size_t len) FAST_FUNC;
1765void sha3_end(sha3_ctx_t *ctx, void *resbuf) FAST_FUNC;
1766
1767extern uint32_t *global_crc32_table;
1768uint32_t *crc32_filltable(uint32_t *tbl256, int endian) FAST_FUNC;
1769uint32_t crc32_block_endian1(uint32_t val, const void *buf, unsigned len, uint32_t *crc_table) FAST_FUNC;
1770uint32_t crc32_block_endian0(uint32_t val, const void *buf, unsigned len, uint32_t *crc_table) FAST_FUNC;
1771
1772typedef struct masks_labels_t {
1773 const char *labels;
1774 const int masks[];
1775} masks_labels_t;
1776int print_flags_separated(const int *masks, const char *labels,
1777 int flags, const char *separator) FAST_FUNC;
1778int print_flags(const masks_labels_t *ml, int flags) FAST_FUNC;
1779
1780typedef struct bb_progress_t {
1781 unsigned last_size;
1782 unsigned last_update_sec;
1783 unsigned last_change_sec;
1784 unsigned start_sec;
1785 const char *curfile;
1786} bb_progress_t;
1787
1788#define is_bb_progress_inited(p) ((p)->curfile != NULL)
1789#define bb_progress_free(p) do { \
1790 if (ENABLE_UNICODE_SUPPORT) free((char*)((p)->curfile)); \
1791 (p)->curfile = NULL; \
1792} while (0)
1793void bb_progress_init(bb_progress_t *p, const char *curfile) FAST_FUNC;
1794void bb_progress_update(bb_progress_t *p,
1795 uoff_t beg_range,
1796 uoff_t transferred,
1797 uoff_t totalsize) FAST_FUNC;
1798
1799unsigned ubi_devnum_from_devname(const char *str) FAST_FUNC;
1800int ubi_get_volid_by_name(unsigned ubi_devnum, const char *vol_name) FAST_FUNC;
1801
1802
1803extern const char *applet_name;
1804
1805/* Some older linkers don't perform string merging, we used to have common strings
1806 * as global arrays to do it by hand. But:
1807 * (1) newer linkers do it themselves,
1808 * (2) however, they DONT merge string constants with global arrays,
1809 * even if the value is the same (!). Thus global arrays actually
1810 * increased size a bit: for example, "/etc/passwd" string from libc
1811 * wasn't merged with bb_path_passwd_file[] array!
1812 * Therefore now we use #defines.
1813 */
1814/* "BusyBox vN.N.N (timestamp or extra_version)" */
1815extern const char bb_banner[] ALIGN1;
1816extern const char bb_msg_memory_exhausted[] ALIGN1;
1817extern const char bb_msg_invalid_date[] ALIGN1;
1818#define bb_msg_read_error "read error"
1819#define bb_msg_write_error "write error"
1820extern const char bb_msg_unknown[] ALIGN1;
1821extern const char bb_msg_can_not_create_raw_socket[] ALIGN1;
1822extern const char bb_msg_perm_denied_are_you_root[] ALIGN1;
1823extern const char bb_msg_you_must_be_root[] ALIGN1;
1824extern const char bb_msg_requires_arg[] ALIGN1;
1825extern const char bb_msg_invalid_arg_to[] ALIGN1;
1826extern const char bb_msg_standard_input[] ALIGN1;
1827extern const char bb_msg_standard_output[] ALIGN1;
1828
1829/* NB: (bb_hexdigits_upcase[i] | 0x20) -> lowercase hex digit */
1830extern const char bb_hexdigits_upcase[] ALIGN1;
1831
1832extern const char bb_path_wtmp_file[] ALIGN1;
1833
1834/* Busybox mount uses either /proc/mounts or /etc/mtab to
1835 * get the list of currently mounted filesystems */
1836#define bb_path_mtab_file IF_FEATURE_MTAB_SUPPORT("/etc/mtab")IF_NOT_FEATURE_MTAB_SUPPORT("/proc/mounts")
1837
1838#define bb_path_passwd_file _PATH_PASSWD
1839#define bb_path_group_file _PATH_GROUP
1840#define bb_path_shadow_file _PATH_SHADOW
1841#define bb_path_gshadow_file _PATH_GSHADOW
1842
1843#define bb_path_motd_file "/etc/motd"
1844
1845#define bb_dev_null "/dev/null"
1846extern const char bb_busybox_exec_path[] ALIGN1;
1847/* util-linux manpage says /sbin:/bin:/usr/sbin:/usr/bin,
1848 * but I want to save a few bytes here */
1849extern const char bb_PATH_root_path[] ALIGN1; /* "PATH=/sbin:/usr/sbin:/bin:/usr/bin" */
1850#define bb_default_root_path (bb_PATH_root_path + sizeof("PATH"))
1851#define bb_default_path (bb_PATH_root_path + sizeof("PATH=/sbin:/usr/sbin"))
1852
1853extern const int const_int_0;
1854//extern const int const_int_1;
1855
1856/* This struct is deliberately not defined. */
1857/* See docs/keep_data_small.txt */
1858struct globals;
1859/* '*const' ptr makes gcc optimize code much better.
1860 * Magic prevents ptr_to_globals from going into rodata.
1861 * If you want to assign a value, use SET_PTR_TO_GLOBALS(x) */
1862extern struct globals *const ptr_to_globals;
1863/* At least gcc 3.4.6 on mipsel system needs optimization barrier */
1864#define barrier() __asm__ __volatile__("":::"memory")
1865#define SET_PTR_TO_GLOBALS(x) do { \
1866 (*(struct globals**)&ptr_to_globals) = (void*)(x); \
1867 barrier(); \
1868} while (0)
1869#define FREE_PTR_TO_GLOBALS() do { \
1870 if (ENABLE_FEATURE_CLEAN_UP) { \
1871 free(ptr_to_globals); \
1872 } \
1873} while (0)
1874
1875/* You can change LIBBB_DEFAULT_LOGIN_SHELL, but don't use it,
1876 * use bb_default_login_shell and following defines.
1877 * If you change LIBBB_DEFAULT_LOGIN_SHELL,
1878 * don't forget to change increment constant. */
1879#define LIBBB_DEFAULT_LOGIN_SHELL "-/bin/sh"
1880extern const char bb_default_login_shell[] ALIGN1;
1881/* "/bin/sh" */
1882#define DEFAULT_SHELL (bb_default_login_shell+1)
1883/* "sh" */
1884#define DEFAULT_SHELL_SHORT_NAME (bb_default_login_shell+6)
1885
1886/* The following devices are the same on all systems. */
1887#define CURRENT_TTY "/dev/tty"
1888#define DEV_CONSOLE "/dev/console"
1889
1890#if defined(__FreeBSD_kernel__)
1891# define CURRENT_VC CURRENT_TTY
1892# define VC_1 "/dev/ttyv0"
1893# define VC_2 "/dev/ttyv1"
1894# define VC_3 "/dev/ttyv2"
1895# define VC_4 "/dev/ttyv3"
1896# define VC_5 "/dev/ttyv4"
1897# define VC_FORMAT "/dev/ttyv%d"
1898#elif defined(__GNU__)
1899# define CURRENT_VC CURRENT_TTY
1900# define VC_1 "/dev/tty1"
1901# define VC_2 "/dev/tty2"
1902# define VC_3 "/dev/tty3"
1903# define VC_4 "/dev/tty4"
1904# define VC_5 "/dev/tty5"
1905# define VC_FORMAT "/dev/tty%d"
1906#elif ENABLE_FEATURE_DEVFS
1907/*Linux, obsolete devfs names */
1908# define CURRENT_VC "/dev/vc/0"
1909# define VC_1 "/dev/vc/1"
1910# define VC_2 "/dev/vc/2"
1911# define VC_3 "/dev/vc/3"
1912# define VC_4 "/dev/vc/4"
1913# define VC_5 "/dev/vc/5"
1914# define VC_FORMAT "/dev/vc/%d"
1915# define LOOP_FORMAT "/dev/loop/%u"
1916# define LOOP_NAMESIZE (sizeof("/dev/loop/") + sizeof(int)*3 + 1)
1917# define LOOP_NAME "/dev/loop/"
1918# define FB_0 "/dev/fb/0"
1919#else
1920/*Linux, normal names */
1921# define CURRENT_VC "/dev/tty0"
1922# define VC_1 "/dev/tty1"
1923# define VC_2 "/dev/tty2"
1924# define VC_3 "/dev/tty3"
1925# define VC_4 "/dev/tty4"
1926# define VC_5 "/dev/tty5"
1927# define VC_FORMAT "/dev/tty%d"
1928# define LOOP_FORMAT "/dev/loop%u"
1929# define LOOP_NAMESIZE (sizeof("/dev/loop") + sizeof(int)*3 + 1)
1930# define LOOP_NAME "/dev/loop"
1931# define FB_0 "/dev/fb0"
1932#endif
1933
1934
1935#define ARRAY_SIZE(x) ((unsigned)(sizeof(x) / sizeof((x)[0])))
1936#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
1937
1938
1939/* We redefine ctype macros. Unicode-correct handling of char types
1940 * can't be done with such byte-oriented operations anyway,
1941 * we don't lose anything.
1942 */
1943#undef isalnum
1944#undef isalpha
1945#undef isascii
1946#undef isblank
1947#undef iscntrl
1948#undef isdigit
1949#undef isgraph
1950#undef islower
1951#undef isprint
1952#undef ispunct
1953#undef isspace
1954#undef isupper
1955#undef isxdigit
1956#undef toupper
1957#undef tolower
1958
1959/* We save ~500 bytes on isdigit alone.
1960 * BTW, x86 likes (unsigned char) cast more than (unsigned). */
1961
1962/* These work the same for ASCII and Unicode,
1963 * assuming no one asks "is this a *Unicode* letter?" using isalpha(letter) */
1964#define isascii(a) ((unsigned char)(a) <= 0x7f)
1965#define isdigit(a) ((unsigned char)((a) - '0') <= 9)
1966#define isupper(a) ((unsigned char)((a) - 'A') <= ('Z' - 'A'))
1967#define islower(a) ((unsigned char)((a) - 'a') <= ('z' - 'a'))
1968#define isalpha(a) ((unsigned char)(((a)|0x20) - 'a') <= ('z' - 'a'))
1969#define isblank(a) ({ unsigned char bb__isblank = (a); bb__isblank == ' ' || bb__isblank == '\t'; })
1970#define iscntrl(a) ({ unsigned char bb__iscntrl = (a); bb__iscntrl < ' ' || bb__iscntrl == 0x7f; })
1971/* In POSIX/C locale isspace is only these chars: "\t\n\v\f\r" and space.
1972 * "\t\n\v\f\r" happen to have ASCII codes 9,10,11,12,13.
1973 */
1974#define isspace(a) ({ unsigned char bb__isspace = (a) - 9; bb__isspace == (' ' - 9) || bb__isspace <= (13 - 9); })
1975// Unsafe wrt NUL: #define ispunct(a) (strchr("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a)) != NULL)
1976#define ispunct(a) (strchrnul("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a))[0])
1977// Bigger code: #define isalnum(a) ({ unsigned char bb__isalnum = (a) - '0'; bb__isalnum <= 9 || ((bb__isalnum - ('A' - '0')) & 0xdf) <= 25; })
1978#define isalnum(a) bb_ascii_isalnum(a)
1979static ALWAYS_INLINE int bb_ascii_isalnum(unsigned char a)
1980{
1981 unsigned char b = a - '0';
1982 if (b <= 9)
1983 return (b <= 9);
1984 b = (a|0x20) - 'a';
1985 return b <= 'z' - 'a';
1986}
1987#define isxdigit(a) bb_ascii_isxdigit(a)
1988static ALWAYS_INLINE int bb_ascii_isxdigit(unsigned char a)
1989{
1990 unsigned char b = a - '0';
1991 if (b <= 9)
1992 return (b <= 9);
1993 b = (a|0x20) - 'a';
1994 return b <= 'f' - 'a';
1995}
1996#define toupper(a) bb_ascii_toupper(a)
1997static ALWAYS_INLINE unsigned char bb_ascii_toupper(unsigned char a)
1998{
1999 unsigned char b = a - 'a';
2000 if (b <= ('z' - 'a'))
2001 a -= 'a' - 'A';
2002 return a;
2003}
2004#define tolower(a) bb_ascii_tolower(a)
2005static ALWAYS_INLINE unsigned char bb_ascii_tolower(unsigned char a)
2006{
2007 unsigned char b = a - 'A';
2008 if (b <= ('Z' - 'A'))
2009 a += 'a' - 'A';
2010 return a;
2011}
2012
2013/* In ASCII and Unicode, these are likely to be very different.
2014 * Let's prevent ambiguous usage from the start */
2015#define isgraph(a) isgraph_is_ambiguous_dont_use(a)
2016#define isprint(a) isprint_is_ambiguous_dont_use(a)
2017/* NB: must not treat EOF as isgraph or isprint */
2018#define isgraph_asciionly(a) ((unsigned)((a) - 0x21) <= 0x7e - 0x21)
2019#define isprint_asciionly(a) ((unsigned)((a) - 0x20) <= 0x7e - 0x20)
2020
2021
2022/* Simple unit-testing framework */
2023
2024typedef void (*bbunit_testfunc)(void);
2025
2026struct bbunit_listelem {
2027 const char* name;
2028 bbunit_testfunc testfunc;
2029};
2030
2031void bbunit_registertest(struct bbunit_listelem* test);
2032void bbunit_settestfailed(void);
2033
2034#define BBUNIT_DEFINE_TEST(NAME) \
2035 static void bbunit_##NAME##_test(void); \
2036 static struct bbunit_listelem bbunit_##NAME##_elem = { \
2037 .name = #NAME, \
2038 .testfunc = bbunit_##NAME##_test, \
2039 }; \
2040 static void INIT_FUNC bbunit_##NAME##_register(void) \
2041 { \
2042 bbunit_registertest(&bbunit_##NAME##_elem); \
2043 } \
2044 static void bbunit_##NAME##_test(void)
2045
2046/*
2047 * Both 'goto bbunit_end' and 'break' are here only to get rid
2048 * of compiler warnings.
2049 */
2050#define BBUNIT_ENDTEST \
2051 do { \
2052 goto bbunit_end; \
2053 bbunit_end: \
2054 break; \
2055 } while (0)
2056
2057#define BBUNIT_PRINTASSERTFAIL \
2058 do { \
2059 bb_error_msg( \
2060 "[ERROR] Assertion failed in file %s, line %d", \
2061 __FILE__, __LINE__); \
2062 } while (0)
2063
2064#define BBUNIT_ASSERTION_FAILED \
2065 do { \
2066 bbunit_settestfailed(); \
2067 goto bbunit_end; \
2068 } while (0)
2069
2070/*
2071 * Assertions.
2072 * For now we only offer assertions which cause tests to fail
2073 * immediately. In the future 'expects' might be added too -
2074 * similar to those offered by the gtest framework.
2075 */
2076#define BBUNIT_ASSERT_EQ(EXPECTED, ACTUAL) \
2077 do { \
2078 if ((EXPECTED) != (ACTUAL)) { \
2079 BBUNIT_PRINTASSERTFAIL; \
2080 bb_error_msg("[ERROR] '%s' isn't equal to '%s'", \
2081 #EXPECTED, #ACTUAL); \
2082 BBUNIT_ASSERTION_FAILED; \
2083 } \
2084 } while (0)
2085
2086#define BBUNIT_ASSERT_NOTEQ(EXPECTED, ACTUAL) \
2087 do { \
2088 if ((EXPECTED) == (ACTUAL)) { \
2089 BBUNIT_PRINTASSERTFAIL; \
2090 bb_error_msg("[ERROR] '%s' is equal to '%s'", \
2091 #EXPECTED, #ACTUAL); \
2092 BBUNIT_ASSERTION_FAILED; \
2093 } \
2094 } while (0)
2095
2096#define BBUNIT_ASSERT_NOTNULL(PTR) \
2097 do { \
2098 if ((PTR) == NULL) { \
2099 BBUNIT_PRINTASSERTFAIL; \
2100 bb_error_msg("[ERROR] '%s' is NULL!", #PTR); \
2101 BBUNIT_ASSERTION_FAILED; \
2102 } \
2103 } while (0)
2104
2105#define BBUNIT_ASSERT_NULL(PTR) \
2106 do { \
2107 if ((PTR) != NULL) { \
2108 BBUNIT_PRINTASSERTFAIL; \
2109 bb_error_msg("[ERROR] '%s' is not NULL!", #PTR); \
2110 BBUNIT_ASSERTION_FAILED; \
2111 } \
2112 } while (0)
2113
2114#define BBUNIT_ASSERT_FALSE(STATEMENT) \
2115 do { \
2116 if ((STATEMENT)) { \
2117 BBUNIT_PRINTASSERTFAIL; \
2118 bb_error_msg("[ERROR] Statement '%s' evaluated to true!", \
2119 #STATEMENT); \
2120 BBUNIT_ASSERTION_FAILED; \
2121 } \
2122 } while (0)
2123
2124#define BBUNIT_ASSERT_TRUE(STATEMENT) \
2125 do { \
2126 if (!(STATEMENT)) { \
2127 BBUNIT_PRINTASSERTFAIL; \
2128 bb_error_msg("[ERROR] Statement '%s' evaluated to false!", \
2129 #STATEMENT); \
2130 BBUNIT_ASSERTION_FAILED; \
2131 } \
2132 } while (0)
2133
2134#define BBUNIT_ASSERT_STREQ(STR1, STR2) \
2135 do { \
2136 if (strcmp(STR1, STR2) != 0) { \
2137 BBUNIT_PRINTASSERTFAIL; \
2138 bb_error_msg("[ERROR] Strings '%s' and '%s' " \
2139 "are not the same", STR1, STR2); \
2140 BBUNIT_ASSERTION_FAILED; \
2141 } \
2142 } while (0)
2143
2144#define BBUNIT_ASSERT_STRNOTEQ(STR1, STR2) \
2145 do { \
2146 if (strcmp(STR1, STR2) == 0) { \
2147 BBUNIT_PRINTASSERTFAIL; \
2148 bb_error_msg("[ERROR] Strings '%s' and '%s' " \
2149 "are the same, but were " \
2150 "expected to differ", STR1, STR2); \
2151 BBUNIT_ASSERTION_FAILED; \
2152 } \
2153 } while (0)
2154
2155
2156POP_SAVED_FUNCTION_VISIBILITY
2157
2158#endif
2159
generated by cgit at 2024-05-14 06:18:25 (GMT)