blob: 6d2347163364ccf21024875b0c18b2dd5cebf444
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * dos2unix for BusyBox |
4 | * |
5 | * dos2unix '\n' convertor 0.5.0 |
6 | * based on Unix2Dos 0.9.0 by Peter Hanecak (made 19.2.1997) |
7 | * Copyright 1997,.. by Peter Hanecak <hanecak@megaloman.sk>. |
8 | * All rights reserved. |
9 | * |
10 | * dos2unix filters reading input from stdin and writing output to stdout. |
11 | * |
12 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
13 | */ |
14 | //config:config DOS2UNIX |
15 | //config: bool "dos2unix" |
16 | //config: default y |
17 | //config: help |
18 | //config: dos2unix is used to convert a text file from DOS format to |
19 | //config: UNIX format, and vice versa. |
20 | //config: |
21 | //config:config UNIX2DOS |
22 | //config: bool "unix2dos" |
23 | //config: default y |
24 | //config: help |
25 | //config: unix2dos is used to convert a text file from UNIX format to |
26 | //config: DOS format, and vice versa. |
27 | |
28 | //applet:IF_DOS2UNIX(APPLET_NOEXEC(dos2unix, dos2unix, BB_DIR_USR_BIN, BB_SUID_DROP, dos2unix)) |
29 | //applet:IF_UNIX2DOS(APPLET_NOEXEC(unix2dos, dos2unix, BB_DIR_USR_BIN, BB_SUID_DROP, unix2dos)) |
30 | |
31 | //kbuild:lib-$(CONFIG_DOS2UNIX) += dos2unix.o |
32 | //kbuild:lib-$(CONFIG_UNIX2DOS) += dos2unix.o |
33 | |
34 | //usage:#define dos2unix_trivial_usage |
35 | //usage: "[-ud] [FILE]" |
36 | //usage:#define dos2unix_full_usage "\n\n" |
37 | //usage: "Convert FILE in-place from DOS to Unix format.\n" |
38 | //usage: "When no file is given, use stdin/stdout.\n" |
39 | //usage: "\n -u dos2unix" |
40 | //usage: "\n -d unix2dos" |
41 | //usage: |
42 | //usage:#define unix2dos_trivial_usage |
43 | //usage: "[-ud] [FILE]" |
44 | //usage:#define unix2dos_full_usage "\n\n" |
45 | //usage: "Convert FILE in-place from Unix to DOS format.\n" |
46 | //usage: "When no file is given, use stdin/stdout.\n" |
47 | //usage: "\n -u dos2unix" |
48 | //usage: "\n -d unix2dos" |
49 | |
50 | #include "libbb.h" |
51 | |
52 | /* This is a NOEXEC applet. Be very careful! */ |
53 | |
54 | enum { |
55 | CT_UNIX2DOS = 1, |
56 | CT_DOS2UNIX |
57 | }; |
58 | |
59 | /* if fn is NULL then input is stdin and output is stdout */ |
60 | static void convert(char *fn, int conv_type) |
61 | { |
62 | FILE *in, *out; |
63 | int ch; |
64 | char *temp_fn = temp_fn; /* for compiler */ |
65 | char *resolved_fn = resolved_fn; |
66 | |
67 | in = stdin; |
68 | out = stdout; |
69 | if (fn != NULL) { |
70 | struct stat st; |
71 | int fd; |
72 | |
73 | resolved_fn = xmalloc_follow_symlinks(fn); |
74 | if (resolved_fn == NULL) |
75 | bb_simple_perror_msg_and_die(fn); |
76 | in = xfopen_for_read(resolved_fn); |
77 | xfstat(fileno(in), &st, resolved_fn); |
78 | |
79 | temp_fn = xasprintf("%sXXXXXX", resolved_fn); |
80 | fd = xmkstemp(temp_fn); |
81 | if (fchmod(fd, st.st_mode) == -1) |
82 | bb_simple_perror_msg_and_die(temp_fn); |
83 | fchown(fd, st.st_uid, st.st_gid); |
84 | |
85 | out = xfdopen_for_write(fd); |
86 | } |
87 | |
88 | while ((ch = fgetc(in)) != EOF) { |
89 | if (ch == '\r') |
90 | continue; |
91 | if (ch == '\n') |
92 | if (conv_type == CT_UNIX2DOS) |
93 | fputc('\r', out); |
94 | fputc(ch, out); |
95 | } |
96 | |
97 | if (fn != NULL) { |
98 | if (fclose(in) < 0 || fclose(out) < 0) { |
99 | unlink(temp_fn); |
100 | bb_perror_nomsg_and_die(); |
101 | } |
102 | xrename(temp_fn, resolved_fn); |
103 | free(temp_fn); |
104 | free(resolved_fn); |
105 | } |
106 | } |
107 | |
108 | int dos2unix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
109 | int dos2unix_main(int argc UNUSED_PARAM, char **argv) |
110 | { |
111 | int o, conv_type; |
112 | |
113 | /* See if we are supposed to be doing dos2unix or unix2dos */ |
114 | if (ENABLE_DOS2UNIX |
115 | && (!ENABLE_UNIX2DOS || applet_name[0] == 'd') |
116 | ) { |
117 | conv_type = CT_DOS2UNIX; |
118 | } else { |
119 | conv_type = CT_UNIX2DOS; |
120 | } |
121 | |
122 | /* -u convert to unix, -d convert to dos */ |
123 | opt_complementary = "u--d:d--u"; /* mutually exclusive */ |
124 | o = getopt32(argv, "du"); |
125 | |
126 | /* Do the conversion requested by an argument else do the default |
127 | * conversion depending on our name. */ |
128 | if (o) |
129 | conv_type = o; |
130 | |
131 | argv += optind; |
132 | do { |
133 | /* might be convert(NULL) if there is no filename given */ |
134 | convert(*argv, conv_type); |
135 | } while (*argv && *++argv); |
136 | |
137 | return 0; |
138 | } |
139 |