| 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 GPLv2 or later, see file LICENSE in this source tree.
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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 | /* This is a NOEXEC applet. Be very careful! */
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| 18 |
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| 19 | enum {
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| 20 | CT_UNIX2DOS = 1,
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| 21 | CT_DOS2UNIX
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| 22 | };
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| 23 |
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| 24 | /* if fn is NULL then input is stdin and output is stdout */
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| 25 | static void convert(char *fn, int conv_type)
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| 26 | {
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| 27 | FILE *in, *out;
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| 28 | int i;
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| 29 | char *temp_fn = temp_fn; /* for compiler */
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| 30 | char *resolved_fn = resolved_fn;
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| 31 |
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| 32 | in = stdin;
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| 33 | out = stdout;
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| 34 | if (fn != NULL) {
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| 35 | struct stat st;
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| 36 |
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| 37 | resolved_fn = xmalloc_follow_symlinks(fn);
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| 38 | if (resolved_fn == NULL)
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| 39 | bb_simple_perror_msg_and_die(fn);
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| 40 | in = xfopen_for_read(resolved_fn);
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| 41 | fstat(fileno(in), &st);
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| 42 |
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| 43 | temp_fn = xasprintf("%sXXXXXX", resolved_fn);
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| 44 | i = xmkstemp(temp_fn);
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| 45 | if (fchmod(i, st.st_mode) == -1)
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| 46 | bb_simple_perror_msg_and_die(temp_fn);
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| 47 |
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| 48 | out = xfdopen_for_write(i);
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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(i, out);
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| 58 | }
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| 59 |
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| 60 | if (fn != NULL) {
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| 61 | if (fclose(in) < 0 || fclose(out) < 0) {
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| 62 | unlink(temp_fn);
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| 63 | bb_perror_nomsg_and_die();
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| 64 | }
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| 65 | xrename(temp_fn, resolved_fn);
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| 66 | free(temp_fn);
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| 67 | free(resolved_fn);
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| 68 | }
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| 69 | }
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| 70 |
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| 71 | int dos2unix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 72 | int dos2unix_main(int argc UNUSED_PARAM, char **argv)
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| 73 | {
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| 74 | int o, conv_type;
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| 75 |
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| 76 | /* See if we are supposed to be doing dos2unix or unix2dos */
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| 77 | conv_type = CT_UNIX2DOS;
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| 78 | if (applet_name[0] == 'd') {
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| 79 | conv_type = CT_DOS2UNIX;
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| 80 | }
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| 81 |
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| 82 | /* -u convert to unix, -d convert to dos */
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| 83 | opt_complementary = "u--d:d--u"; /* mutually exclusive */
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| 84 | o = getopt32(argv, "du");
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| 85 |
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| 86 | /* Do the conversion requested by an argument else do the default
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| 87 | * conversion depending on our name. */
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| 88 | if (o)
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| 89 | conv_type = o;
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| 90 |
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| 91 | argv += optind;
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| 92 | do {
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| 93 | /* might be convert(NULL) if there is no filename given */
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| 94 | convert(*argv, conv_type);
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| 95 | } while (*argv && *++argv);
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| 96 |
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| 97 | return 0;
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| 98 | }
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