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