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