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112 lines
2.4 KiB
C
112 lines
2.4 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* dos2unix for BusyBox
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*
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* dos2unix '\n' convertor 0.5.0
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* based on Unix2Dos 0.9.0 by Peter Hanecak (made 19.2.1997)
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* Copyright 1997,.. by Peter Hanecak <hanecak@megaloman.sk>.
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* All rights reserved.
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*
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* dos2unix filters reading input from stdin and writing output to stdout.
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*
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* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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*/
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#include "libbb.h"
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enum {
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CT_UNIX2DOS = 1,
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CT_DOS2UNIX
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};
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/* if fn is NULL then input is stdin and output is stdout */
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static int convert(char *fn, int conv_type)
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{
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FILE *in, *out;
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int i;
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#define name_buf bb_common_bufsiz1
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in = stdin;
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out = stdout;
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if (fn != NULL) {
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in = xfopen(fn, "rw");
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/*
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The file is then created with mode read/write and
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permissions 0666 for glibc 2.0.6 and earlier or
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0600 for glibc 2.0.7 and later.
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*/
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snprintf(name_buf, sizeof(name_buf), "%sXXXXXX", fn);
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i = mkstemp(&name_buf[0]);
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if (i == -1 || chmod(name_buf, 0600) == -1) {
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bb_perror_nomsg_and_die();
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}
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out = fdopen(i, "w+");
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if (!out) {
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close(i);
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remove(name_buf);
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return -2;
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}
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}
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while ((i = fgetc(in)) != EOF) {
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if (i == '\r')
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continue;
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if (i == '\n') {
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if (conv_type == CT_UNIX2DOS)
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fputc('\r', out);
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fputc('\n', out);
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continue;
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}
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fputc(i, out);
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}
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if (fn != NULL) {
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if (fclose(in) < 0 || fclose(out) < 0) {
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bb_perror_nomsg();
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remove(name_buf);
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return -2;
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}
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/* Assume they are both on the same filesystem (which
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* should be true since we put them into the same directory
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* so we _should_ be ok, but you never know... */
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if (rename(name_buf, fn) < 0) {
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bb_perror_msg("cannot rename '%s' as '%s'", name_buf, fn);
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return -1;
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}
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}
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return 0;
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}
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int dos2unix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int dos2unix_main(int argc, char **argv)
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{
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int o, conv_type;
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/* See if we are supposed to be doing dos2unix or unix2dos */
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if (applet_name[0] == 'd') {
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conv_type = CT_DOS2UNIX; /* 2 */
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} else {
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conv_type = CT_UNIX2DOS; /* 1 */
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}
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/* -u convert to unix, -d convert to dos */
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opt_complementary = "u--d:d--u"; /* mutually exclusive */
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o = getopt32(argv, "du");
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/* Do the conversion requested by an argument else do the default
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* conversion depending on our name. */
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if (o)
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conv_type = o;
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do {
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/* might be convert(NULL) if there is no filename given */
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o = convert(argv[optind], conv_type);
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if (o < 0)
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break;
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optind++;
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} while (optind < argc);
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return o;
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}
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