121 lines
2.7 KiB
C
121 lines
2.7 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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*
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* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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*/
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#include <string.h>
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#include <unistd.h>
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#include <stdint.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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#define CT_UNIX2DOS 1
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#define CT_DOS2UNIX 2
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#define tempFn bb_common_bufsiz1
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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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FILE *in, *out;
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if (fn != NULL) {
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in = bb_xfopen(fn, "rw");
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/*
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The file is then created with mode read/write and
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permissions 0666 for glibc 2.0.6 and earlier or
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0600 for glibc 2.0.7 and later.
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*/
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snprintf(tempFn, sizeof(tempFn), "%sXXXXXX", fn);
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/*
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sizeof tempFn is 4096, so it should be big enough to hold the full
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path. however if the output is truncated the subsequent call to
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mkstemp would fail.
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*/
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if ((fd = mkstemp(&tempFn[0])) == -1 || chmod(tempFn, 0600) == -1) {
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bb_perror_nomsg_and_die();
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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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}
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} else {
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in = stdin;
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out = stdout;
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}
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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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bb_perror_nomsg();
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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 (which
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* should be true since we put them into the same directory
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* so we _should_ be ok, but you never know... */
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if (rename(tempFn, fn) < 0) {
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bb_perror_msg("cannot 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;
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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; /*2*/
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} else {
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ConvType = CT_UNIX2DOS; /*1*/
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}
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/* -u and -d are mutally exclusive */
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bb_opt_complementally = "?:u--d:d--u";
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/* process parameters */
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/* -u convert to unix */
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/* -d convert to dos */
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o = bb_getopt_ulflags(argc, argv, "du");
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/* Do the conversion requested by an argument else do the default
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* conversion depending on our name. */
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if (o)
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ConvType = o;
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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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