source: branches/3.2/mindi-busybox/coreutils/dos2unix.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 5 years ago
  • Update mindi-busybox to 1.21.1
File size: 2.7 KB
Line 
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
35enum {
36    CT_UNIX2DOS = 1,
37    CT_DOS2UNIX
38};
39
40/* if fn is NULL then input is stdin and output is stdout */
41static void convert(char *fn, int conv_type)
42{
43    FILE *in, *out;
44    int i;
45    char *temp_fn = temp_fn; /* for compiler */
46    char *resolved_fn = resolved_fn;
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
87int dos2unix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
88int 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}
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