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 int convert(char *fn, int conv_type)
|
---|
24 | {
|
---|
25 | FILE *in, *out;
|
---|
26 | int i;
|
---|
27 | #define name_buf bb_common_bufsiz1
|
---|
28 |
|
---|
29 | in = stdin;
|
---|
30 | out = stdout;
|
---|
31 | if (fn != NULL) {
|
---|
32 | in = xfopen(fn, "rw");
|
---|
33 | /*
|
---|
34 | The file is then created with mode read/write and
|
---|
35 | permissions 0666 for glibc 2.0.6 and earlier or
|
---|
36 | 0600 for glibc 2.0.7 and later.
|
---|
37 | */
|
---|
38 | snprintf(name_buf, sizeof(name_buf), "%sXXXXXX", fn);
|
---|
39 | i = mkstemp(&name_buf[0]);
|
---|
40 | if (i == -1 || chmod(name_buf, 0600) == -1) {
|
---|
41 | bb_perror_nomsg_and_die();
|
---|
42 | }
|
---|
43 | out = fdopen(i, "w+");
|
---|
44 | if (!out) {
|
---|
45 | close(i);
|
---|
46 | remove(name_buf);
|
---|
47 | return -2;
|
---|
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('\n', out);
|
---|
58 | continue;
|
---|
59 | }
|
---|
60 | fputc(i, out);
|
---|
61 | }
|
---|
62 |
|
---|
63 | if (fn != NULL) {
|
---|
64 | if (fclose(in) < 0 || fclose(out) < 0) {
|
---|
65 | bb_perror_nomsg();
|
---|
66 | remove(name_buf);
|
---|
67 | return -2;
|
---|
68 | }
|
---|
69 | /* Assume they are both on the same filesystem (which
|
---|
70 | * should be true since we put them into the same directory
|
---|
71 | * so we _should_ be ok, but you never know... */
|
---|
72 | if (rename(name_buf, fn) < 0) {
|
---|
73 | bb_perror_msg("cannot rename '%s' as '%s'", name_buf, fn);
|
---|
74 | return -1;
|
---|
75 | }
|
---|
76 | }
|
---|
77 |
|
---|
78 | return 0;
|
---|
79 | }
|
---|
80 |
|
---|
81 | int dos2unix_main(int argc, char **argv);
|
---|
82 | int dos2unix_main(int argc, char **argv)
|
---|
83 | {
|
---|
84 | int o, conv_type;
|
---|
85 |
|
---|
86 | /* See if we are supposed to be doing dos2unix or unix2dos */
|
---|
87 | if (applet_name[0] == 'd') {
|
---|
88 | conv_type = CT_DOS2UNIX; /* 2 */
|
---|
89 | } else {
|
---|
90 | conv_type = CT_UNIX2DOS; /* 1 */
|
---|
91 | }
|
---|
92 |
|
---|
93 | /* -u convert to unix, -d convert to dos */
|
---|
94 | opt_complementary = "u--d:d--u"; /* mutually exclusive */
|
---|
95 | o = getopt32(argv, "du");
|
---|
96 |
|
---|
97 | /* Do the conversion requested by an argument else do the default
|
---|
98 | * conversion depending on our name. */
|
---|
99 | if (o)
|
---|
100 | conv_type = o;
|
---|
101 |
|
---|
102 | do {
|
---|
103 | /* might be convert(NULL) if there is no filename given */
|
---|
104 | o = convert(argv[optind], conv_type);
|
---|
105 | if (o < 0)
|
---|
106 | break;
|
---|
107 | optind++;
|
---|
108 | } while (optind < argc);
|
---|
109 |
|
---|
110 | return o;
|
---|
111 | }
|
---|