mirror of
https://github.com/sheumann/hush.git
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184 lines
4.3 KiB
C
184 lines
4.3 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 <string.h>
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#include <getopt.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/time.h>
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#include "busybox.h"
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static const char letters[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
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// if fn is NULL then input is stdin and output is stdout
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static int convert(char *fn, int ConvType)
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{
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int c, fd;
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struct timeval tv;
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char tempFn[BUFSIZ];
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static uint64_t value=0;
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FILE *in = stdin, *out = stdout;
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if (fn != NULL) {
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if ((in = wfopen(fn, "rw")) == NULL) {
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return -1;
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}
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strcpy(tempFn, fn);
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c = strlen(tempFn);
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tempFn[c] = '.';
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while(1) {
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if (c >=BUFSIZ)
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error_msg_and_die("unique name not found");
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/* Get some semi random stuff to try and make a
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* random filename based (and in the same dir as)
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* the input file... */
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gettimeofday (&tv, NULL);
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value += ((uint64_t) tv.tv_usec << 16) ^ tv.tv_sec ^ getpid ();
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tempFn[++c] = letters[value % 62];
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tempFn[c+1] = '\0';
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value /= 62;
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if ((fd = open(tempFn, O_RDWR | O_CREAT | O_EXCL, 0600)) < 0 ) {
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continue;
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}
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out = fdopen(fd, "w+");
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if (!out) {
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close(fd);
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remove(tempFn);
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continue;
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}
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break;
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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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remove(tempFn);
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if (fclose(in) < 0 || fclose(out) < 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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remove(tempFn);
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if ((fclose(in) < 0) || (fclose(out) < 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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}
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if (ConvType == CT_UNIX2DOS) {
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fputc('\r', out);
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}
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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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perror_msg(NULL);
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remove(tempFn);
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return -2;
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}
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/* Assume they are both on the same filesystem */
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if (rename(tempFn, fn) < 0) {
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perror_msg("unable to rename '%s' as '%s'", tempFn, fn);
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return -1;
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}
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}
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return 0;
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}
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int dos2unix_main(int argc, char *argv[])
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{
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int ConvType = CT_AUTO;
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int o;
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//See if we are supposed to be doing dos2unix or unix2dos
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if (argv[0][0]=='d') {
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ConvType = CT_DOS2UNIX;
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}
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if (argv[0][0]=='u') {
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ConvType = CT_UNIX2DOS;
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}
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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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