| 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * dos2unix for BusyBox
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| 4 | *
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| 5 | * dos2unix '\n' convertor 0.5.0
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| 6 | * based on Unix2Dos 0.9.0 by Peter Hanecak (made 19.2.1997)
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| 7 | * Copyright 1997,.. by Peter Hanecak <hanecak@megaloman.sk>.
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| 8 | * All rights reserved.
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| 9 | *
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| 10 | * dos2unix filters reading input from stdin and writing output to stdout.
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| 11 | *
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| 12 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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| 13 | */
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| 14 |
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| 15 | #include "libbb.h"
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| 16 |
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| 17 | enum {
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| 18 | CT_UNIX2DOS = 1,
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| 19 | CT_DOS2UNIX
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| 20 | };
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| 21 |
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| 22 | /* if fn is NULL then input is stdin and output is stdout */
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| 23 | static int convert(char *fn, int conv_type)
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| 24 | {
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| 25 | FILE *in, *out;
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| 26 | int i;
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| 27 | #define name_buf bb_common_bufsiz1
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| 28 |
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| 29 | in = stdin;
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| 30 | out = stdout;
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| 31 | if (fn != NULL) {
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| 32 | in = xfopen(fn, "rw");
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| 33 | /*
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| 34 | The file is then created with mode read/write and
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| 35 | permissions 0666 for glibc 2.0.6 and earlier or
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| 36 | 0600 for glibc 2.0.7 and later.
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| 37 | */
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| 38 | snprintf(name_buf, sizeof(name_buf), "%sXXXXXX", fn);
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| 39 | i = mkstemp(&name_buf[0]);
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| 40 | if (i == -1 || chmod(name_buf, 0600) == -1) {
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| 41 | bb_perror_nomsg_and_die();
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| 42 | }
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| 43 | out = fdopen(i, "w+");
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| 44 | if (!out) {
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| 45 | close(i);
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| 46 | remove(name_buf);
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| 47 | return -2;
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| 48 | }
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| 49 | }
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| 50 |
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| 51 | while ((i = fgetc(in)) != EOF) {
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| 52 | if (i == '\r')
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| 53 | continue;
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| 54 | if (i == '\n') {
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| 55 | if (conv_type == CT_UNIX2DOS)
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| 56 | fputc('\r', out);
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| 57 | fputc('\n', out);
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| 58 | continue;
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| 59 | }
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| 60 | fputc(i, out);
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| 61 | }
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| 62 |
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| 63 | if (fn != NULL) {
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| 64 | if (fclose(in) < 0 || fclose(out) < 0) {
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| 65 | bb_perror_nomsg();
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| 66 | remove(name_buf);
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| 67 | return -2;
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| 68 | }
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| 69 | /* Assume they are both on the same filesystem (which
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| 70 | * should be true since we put them into the same directory
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| 71 | * so we _should_ be ok, but you never know... */
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| 72 | if (rename(name_buf, fn) < 0) {
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| 73 | bb_perror_msg("cannot rename '%s' as '%s'", name_buf, fn);
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| 74 | return -1;
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| 75 | }
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| 76 | }
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| 77 |
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| 78 | return 0;
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| 79 | }
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| 80 |
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| 81 | int dos2unix_main(int argc, char **argv);
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| 82 | int dos2unix_main(int argc, char **argv)
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| 83 | {
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| 84 | int o, conv_type;
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| 85 |
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| 86 | /* See if we are supposed to be doing dos2unix or unix2dos */
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| 87 | if (applet_name[0] == 'd') {
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| 88 | conv_type = CT_DOS2UNIX; /* 2 */
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| 89 | } else {
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| 90 | conv_type = CT_UNIX2DOS; /* 1 */
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| 91 | }
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| 92 |
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| 93 | /* -u convert to unix, -d convert to dos */
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| 94 | opt_complementary = "u--d:d--u"; /* mutually exclusive */
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| 95 | o = getopt32(argv, "du");
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| 96 |
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| 97 | /* Do the conversion requested by an argument else do the default
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| 98 | * conversion depending on our name. */
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| 99 | if (o)
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| 100 | conv_type = o;
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| 101 |
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| 102 | do {
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| 103 | /* might be convert(NULL) if there is no filename given */
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| 104 | o = convert(argv[optind], conv_type);
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| 105 | if (o < 0)
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| 106 | break;
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| 107 | optind++;
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| 108 | } while (optind < argc);
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| 109 |
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| 110 | return o;
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| 111 | }
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