blob: c9ae76ee1088408cd2a7245a03ecdc996fe781a2
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 | |
15 | //usage:#define dos2unix_trivial_usage |
16 | //usage: "[-ud] [FILE]" |
17 | //usage:#define dos2unix_full_usage "\n\n" |
18 | //usage: "Convert FILE in-place from DOS to Unix format.\n" |
19 | //usage: "When no file is given, use stdin/stdout.\n" |
20 | //usage: "\n -u dos2unix" |
21 | //usage: "\n -d unix2dos" |
22 | //usage: |
23 | //usage:#define unix2dos_trivial_usage |
24 | //usage: "[-ud] [FILE]" |
25 | //usage:#define unix2dos_full_usage "\n\n" |
26 | //usage: "Convert FILE in-place from Unix to DOS format.\n" |
27 | //usage: "When no file is given, use stdin/stdout.\n" |
28 | //usage: "\n -u dos2unix" |
29 | //usage: "\n -d unix2dos" |
30 | |
31 | #include "libbb.h" |
32 | |
33 | /* This is a NOEXEC applet. Be very careful! */ |
34 | |
35 | enum { |
36 | CT_UNIX2DOS = 1, |
37 | CT_DOS2UNIX |
38 | }; |
39 | |
40 | /* if fn is NULL then input is stdin and output is stdout */ |
41 | static void convert(char *fn, int conv_type) |
42 | { |
43 | FILE *in, *out; |
44 | int i; |
45 | char *temp_fn = NULL; |
46 | char *resolved_fn = NULL; |
47 | |
48 | in = stdin; |
49 | out = stdout; |
50 | if (fn != NULL) { |
51 | struct stat st; |
52 | |
53 | resolved_fn = xmalloc_follow_symlinks(fn); |
54 | if (resolved_fn == NULL) |
55 | bb_simple_perror_msg_and_die(fn); |
56 | in = xfopen_for_read(resolved_fn); |
57 | fstat(fileno(in), &st); |
58 | |
59 | temp_fn = xasprintf("%sXXXXXX", resolved_fn); |
60 | i = xmkstemp(temp_fn); |
61 | if (fchmod(i, st.st_mode) == -1) |
62 | bb_simple_perror_msg_and_die(temp_fn); |
63 | |
64 | out = xfdopen_for_write(i); |
65 | } |
66 | |
67 | while ((i = fgetc(in)) != EOF) { |
68 | if (i == '\r') |
69 | continue; |
70 | if (i == '\n') |
71 | if (conv_type == CT_UNIX2DOS) |
72 | fputc('\r', out); |
73 | fputc(i, out); |
74 | } |
75 | |
76 | if (fn != NULL) { |
77 | if (fclose(in) < 0 || fclose(out) < 0) { |
78 | unlink(temp_fn); |
79 | bb_perror_nomsg_and_die(); |
80 | } |
81 | xrename(temp_fn, resolved_fn); |
82 | free(temp_fn); |
83 | free(resolved_fn); |
84 | } |
85 | } |
86 | |
87 | int dos2unix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
88 | int dos2unix_main(int argc UNUSED_PARAM, char **argv) |
89 | { |
90 | int o, conv_type; |
91 | |
92 | /* See if we are supposed to be doing dos2unix or unix2dos */ |
93 | conv_type = CT_UNIX2DOS; |
94 | if (applet_name[0] == 'd') { |
95 | conv_type = CT_DOS2UNIX; |
96 | } |
97 | |
98 | /* -u convert to unix, -d convert to dos */ |
99 | opt_complementary = "u--d:d--u"; /* mutually exclusive */ |
100 | o = getopt32(argv, "du"); |
101 | |
102 | /* Do the conversion requested by an argument else do the default |
103 | * conversion depending on our name. */ |
104 | if (o) |
105 | conv_type = o; |
106 | |
107 | argv += optind; |
108 | do { |
109 | /* might be convert(NULL) if there is no filename given */ |
110 | convert(*argv, conv_type); |
111 | } while (*argv && *++argv); |
112 | |
113 | return 0; |
114 | } |
115 |