mirror of
https://github.com/sheumann/hush.git
synced 2024-12-27 01:32:08 +00:00
121 lines
2.7 KiB
C
121 lines
2.7 KiB
C
/*
|
|
* 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 <sys/time.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;
|
|
}
|