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/*
* 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 <string.h>
#include <unistd.h>
#include <stdint.h>
#include <fcntl.h>
#include "busybox.h"
#define CT_UNIX2DOS 1
#define CT_DOS2UNIX 2
#define tempFn bb_common_bufsiz1
/* if fn is NULL then input is stdin and output is stdout */
static int convert(char *fn, int ConvType)
{
int c, fd;
FILE *in, *out;
if (fn != NULL) {
in = bb_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(tempFn, sizeof(tempFn), "%sXXXXXX", fn);
/*
sizeof tempFn is 4096, so it should be big enough to hold the full
path. however if the output is truncated the subsequent call to
mkstemp would fail.
*/
if ((fd = mkstemp(&tempFn[0])) == -1 || chmod(tempFn, 0600) == -1) {
bb_perror_nomsg_and_die();
}
out = fdopen(fd, "w+");
if (!out) {
close(fd);
remove(tempFn);
}
} else {
in = stdin;
out = stdout;
}
while ((c = fgetc(in)) != EOF) {
if (c == '\r')
continue;
if (c == '\n') {
if (ConvType == CT_UNIX2DOS)
fputc('\r', out);
fputc('\n', out);
continue;
}
fputc(c, out);
}
if (fn != NULL) {
if (fclose(in) < 0 || fclose(out) < 0) {
bb_perror_nomsg();
remove(tempFn);
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(tempFn, fn) < 0) {
bb_perror_msg("cannot rename '%s' as '%s'", tempFn, fn);
return -1;
}
}
return 0;
}
int dos2unix_main(int argc, char *argv[])
{
int ConvType;
int o;
/* See if we are supposed to be doing dos2unix or unix2dos */
if (argv[0][0]=='d') {
ConvType = CT_DOS2UNIX; /*2*/
} else {
ConvType = CT_UNIX2DOS; /*1*/
}
/* -u and -d are mutally exclusive */
bb_opt_complementally = "?:u--d:d--u";
/* process parameters */
/* -u convert to unix */
/* -d convert to dos */
o = bb_getopt_ulflags(argc, argv, "du");
/* Do the conversion requested by an argument else do the default
* conversion depending on our name. */
if (o)
ConvType = o;
if (optind < argc) {
while(optind < argc)
if ((o = convert(argv[optind++], ConvType)) < 0)
break;
}
else
o = convert(NULL, ConvType);
return o;
}
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