blob: 4e34149ed319fd43a80af683bf9a666a01f199aa
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * pwdx implementation for busybox |
4 | * |
5 | * Copyright (c) 2004 Nicholas Miell |
6 | * ported from procps by Pere Orga <gotrunks@gmail.com> 2011 |
7 | * |
8 | * Licensed under GPLv2, see file LICENSE in this source tree. |
9 | */ |
10 | |
11 | //config:config PWDX |
12 | //config: bool "pwdx" |
13 | //config: default y |
14 | //config: help |
15 | //config: Report current working directory of a process |
16 | |
17 | //applet:IF_PWDX(APPLET(pwdx, BB_DIR_USR_BIN, BB_SUID_DROP)) |
18 | |
19 | //kbuild:lib-$(CONFIG_PWDX) += pwdx.o |
20 | |
21 | //usage:#define pwdx_trivial_usage |
22 | //usage: "PID..." |
23 | //usage:#define pwdx_full_usage "\n\n" |
24 | //usage: "Show current directory for PIDs" |
25 | |
26 | #include "libbb.h" |
27 | |
28 | int pwdx_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
29 | int pwdx_main(int argc UNUSED_PARAM, char **argv) |
30 | { |
31 | opt_complementary = "-1"; |
32 | getopt32(argv, ""); |
33 | argv += optind; |
34 | |
35 | do { |
36 | char buf[sizeof("/proc/%u/cwd") + sizeof(int)*3]; |
37 | unsigned pid; |
38 | char *s; |
39 | char *arg = *argv; |
40 | |
41 | // Allowed on the command line: |
42 | // /proc/NUM |
43 | // NUM |
44 | if (is_prefixed_with(arg, "/proc/")) |
45 | arg += 6; |
46 | |
47 | pid = bb_strtou(arg, NULL, 10); |
48 | if (errno) |
49 | bb_error_msg_and_die("invalid process id: '%s'", arg); |
50 | |
51 | sprintf(buf, "/proc/%u/cwd", pid); |
52 | |
53 | s = xmalloc_readlink(buf); |
54 | // "pwdx /proc/1" says "/proc/1: DIR", not "1: DIR" |
55 | printf("%s: %s\n", *argv, s ? s : strerror(errno == ENOENT ? ESRCH : errno)); |
56 | free(s); |
57 | } while (*++argv); |
58 | |
59 | return EXIT_SUCCESS; |
60 | } |
61 |