Contents of /trunk/mkinitrd-magellan/busybox/coreutils/dos2unix.c
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 2658 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
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 "busybox.h" |
16 | |
17 | enum ConvType { |
18 | CT_UNIX2DOS = 1, |
19 | CT_DOS2UNIX |
20 | } ConvType; |
21 | |
22 | /* if fn is NULL then input is stdin and output is stdout */ |
23 | static int convert(char *fn) |
24 | { |
25 | FILE *in, *out; |
26 | int i; |
27 | |
28 | if (fn != NULL) { |
29 | in = xfopen(fn, "rw"); |
30 | /* |
31 | The file is then created with mode read/write and |
32 | permissions 0666 for glibc 2.0.6 and earlier or |
33 | 0600 for glibc 2.0.7 and later. |
34 | */ |
35 | snprintf(bb_common_bufsiz1, sizeof(bb_common_bufsiz1), "%sXXXXXX", fn); |
36 | /* |
37 | sizeof bb_common_bufsiz1 is 4096, so it should be big enough to |
38 | hold the full path. However if the output is truncated the |
39 | subsequent call to mkstemp would fail. |
40 | */ |
41 | if ((i = mkstemp(&bb_common_bufsiz1[0])) == -1 |
42 | || chmod(bb_common_bufsiz1, 0600) == -1) { |
43 | bb_perror_nomsg_and_die(); |
44 | } |
45 | out = fdopen(i, "w+"); |
46 | if (!out) { |
47 | close(i); |
48 | remove(bb_common_bufsiz1); |
49 | } |
50 | } else { |
51 | in = stdin; |
52 | out = stdout; |
53 | } |
54 | |
55 | while ((i = fgetc(in)) != EOF) { |
56 | if (i == '\r') |
57 | continue; |
58 | if (i == '\n') { |
59 | if (ConvType == CT_UNIX2DOS) |
60 | fputc('\r', out); |
61 | fputc('\n', out); |
62 | continue; |
63 | } |
64 | fputc(i, out); |
65 | } |
66 | |
67 | if (fn != NULL) { |
68 | if (fclose(in) < 0 || fclose(out) < 0) { |
69 | bb_perror_nomsg(); |
70 | remove(bb_common_bufsiz1); |
71 | return -2; |
72 | } |
73 | /* Assume they are both on the same filesystem (which |
74 | * should be true since we put them into the same directory |
75 | * so we _should_ be ok, but you never know... */ |
76 | if (rename(bb_common_bufsiz1, fn) < 0) { |
77 | bb_perror_msg("cannot rename '%s' as '%s'", bb_common_bufsiz1, fn); |
78 | return -1; |
79 | } |
80 | } |
81 | |
82 | return 0; |
83 | } |
84 | |
85 | int dos2unix_main(int argc, char *argv[]) |
86 | { |
87 | int o; |
88 | |
89 | /* See if we are supposed to be doing dos2unix or unix2dos */ |
90 | if (applet_name[0] == 'd') { |
91 | ConvType = CT_DOS2UNIX; /*2 */ |
92 | } else { |
93 | ConvType = CT_UNIX2DOS; /*1 */ |
94 | } |
95 | /* -u and -d are mutally exclusive */ |
96 | opt_complementary = "?:u--d:d--u"; |
97 | /* process parameters */ |
98 | /* -u convert to unix */ |
99 | /* -d convert to dos */ |
100 | o = getopt32(argc, 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 | ConvType = o; |
106 | |
107 | if (optind < argc) { |
108 | while (optind < argc) |
109 | if ((o = convert(argv[optind++])) < 0) |
110 | break; |
111 | } else |
112 | o = convert(NULL); |
113 | |
114 | return o; |
115 | } |