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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.
* Without arguments it reverts the format (e.i. if source is in UNIX format,
* output is in DOS format and vice versa).
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* See the COPYING file for license information.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <getopt.h>
#include "busybox.h"
#define CT_AUTO 0
#define CT_UNIX2DOS 1
#define CT_DOS2UNIX 2
int convert(char *fn, int ConvType);
int dos2unix_main(int argc, char *argv[]) {
int ConvType = CT_AUTO;
int o;
// process parameters
while ((o = getopt(argc, argv, "du")) != EOF) {
switch (o) {
case 'd':
ConvType = CT_UNIX2DOS;
break;
case 'u':
ConvType = CT_DOS2UNIX;
break;
default:
show_usage();
}
}
if (optind < argc) {
while(optind < argc)
if ((o = convert(argv[optind++], ConvType)) < 0)
break;
}
else
o = convert(NULL, ConvType);
return o;
}
// if fn is NULL then input is stdin and output is stdout
int convert(char *fn, int ConvType) {
char c;
char *tempFn = NULL;
FILE *in = stdin, *out = stdout;
if (fn != NULL) {
if ((in = fopen(fn, "r")) == NULL) {
perror_msg(fn);
return -1;
}
tempFn = tmpnam(NULL);
if (tempFn == NULL || (out = fopen(tempFn, "w")) == NULL) {
perror_msg(NULL);
return -2;
}
}
while ((c = fgetc(in)) != EOF) {
if (c == '\r') {
if ((ConvType == CT_UNIX2DOS) && (fn != NULL)) {
// file is alredy in DOS format so it is not necessery to touch it
if (fclose(in) < 0 || fclose(out) < 0 || remove(tempFn) < 0) {
perror_msg(NULL);
return -2;
}
return 0;
}
if (!ConvType)
ConvType = CT_DOS2UNIX;
break;
}
if (c == '\n') {
if ((ConvType == CT_DOS2UNIX) && (fn != NULL)) {
// file is alredy in UNIX format so it is not necessery to touch it
if (fclose(in) < 0 || fclose(out) < 0 || remove(tempFn) < 0) {
perror_msg(NULL);
return -2;
}
return 0;
}
if (!ConvType)
ConvType = CT_UNIX2DOS;
if (ConvType == CT_UNIX2DOS)
fputc('\r', out);
fputc('\n', out);
break;
}
fputc(c, out);
}
if (c != EOF)
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 ||
(in = fopen(tempFn, "r")) == NULL || (out = fopen(fn, "w")) == NULL) {
perror_msg(NULL);
return -2;
}
while ((c = fgetc(in)) != EOF)
fputc(c, out);
if (fclose(in) < 0 || fclose(out) < 0 || remove(tempFn) < 0) {
perror_msg(NULL);
return -2;
}
}
return 0;
}
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