Contents of /tags/mkinitrd-6_1_3/busybox/coreutils/dos2unix.c
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Mon May 4 18:51:23 2009 UTC (15 years, 4 months ago) by niro
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Mon May 4 18:51:23 2009 UTC (15 years, 4 months ago) by niro
File MIME type: text/plain
File size: 2169 byte(s)
tagged 'mkinitrd-6_1_3'
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 the GPL v2 or later, see the file LICENSE in this tarball. |
13 | */ |
14 | |
15 | #include "libbb.h" |
16 | |
17 | enum { |
18 | CT_UNIX2DOS = 1, |
19 | CT_DOS2UNIX |
20 | }; |
21 | |
22 | /* if fn is NULL then input is stdin and output is stdout */ |
23 | static void convert(char *fn, int conv_type) |
24 | { |
25 | FILE *in, *out; |
26 | int i; |
27 | char *temp_fn = temp_fn; /* for compiler */ |
28 | char *resolved_fn = resolved_fn; |
29 | |
30 | in = stdin; |
31 | out = stdout; |
32 | if (fn != NULL) { |
33 | struct stat st; |
34 | |
35 | resolved_fn = xmalloc_follow_symlinks(fn); |
36 | if (resolved_fn == NULL) |
37 | bb_simple_perror_msg_and_die(fn); |
38 | in = xfopen_for_read(resolved_fn); |
39 | fstat(fileno(in), &st); |
40 | |
41 | temp_fn = xasprintf("%sXXXXXX", resolved_fn); |
42 | i = mkstemp(temp_fn); |
43 | if (i == -1 |
44 | || fchmod(i, st.st_mode) == -1 |
45 | || !(out = fdopen(i, "w+")) |
46 | ) { |
47 | bb_simple_perror_msg_and_die(temp_fn); |
48 | } |
49 | } |
50 | |
51 | while ((i = fgetc(in)) != EOF) { |
52 | if (i == '\r') |
53 | continue; |
54 | if (i == '\n') |
55 | if (conv_type == CT_UNIX2DOS) |
56 | fputc('\r', out); |
57 | fputc(i, out); |
58 | } |
59 | |
60 | if (fn != NULL) { |
61 | if (fclose(in) < 0 || fclose(out) < 0) { |
62 | unlink(temp_fn); |
63 | bb_perror_nomsg_and_die(); |
64 | } |
65 | xrename(temp_fn, resolved_fn); |
66 | free(temp_fn); |
67 | free(resolved_fn); |
68 | } |
69 | } |
70 | |
71 | int dos2unix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
72 | int dos2unix_main(int argc, char **argv) |
73 | { |
74 | int o, conv_type; |
75 | |
76 | /* See if we are supposed to be doing dos2unix or unix2dos */ |
77 | conv_type = CT_UNIX2DOS; |
78 | if (applet_name[0] == 'd') { |
79 | conv_type = CT_DOS2UNIX; |
80 | } |
81 | |
82 | /* -u convert to unix, -d convert to dos */ |
83 | opt_complementary = "u--d:d--u"; /* mutually exclusive */ |
84 | o = getopt32(argv, "du"); |
85 | |
86 | /* Do the conversion requested by an argument else do the default |
87 | * conversion depending on our name. */ |
88 | if (o) |
89 | conv_type = o; |
90 | |
91 | do { |
92 | /* might be convert(NULL) if there is no filename given */ |
93 | convert(argv[optind], conv_type); |
94 | optind++; |
95 | } while (optind < argc); |
96 | |
97 | return 0; |
98 | } |