125 lines
2.5 KiB
C
125 lines
2.5 KiB
C
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/*++
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psxarc - a program to do minimal minipulation and extraction of POSIX-type
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tar and cpio archives. Certainly not as good as real tar and cpio.
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--*/
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include "getopt.h"
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#include "buf.h"
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#include "psxarc.h"
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char *progname = "psxarc";
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char *pchArchive;
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PBUF pbArchive;
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int fRead, fWrite; // what to do; neither == list archive
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int fVerbose; // to be, or not to be
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static void
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usage(void)
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{
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fprintf(stderr,
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"usage: %s [-hrv] [-f archive]\n", progname);
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fprintf(stderr,
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"\t%s -w [-f archive] [-x format] files\n", progname);
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}
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int
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main(int argc, char **argv)
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{
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int c;
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char *pchOpts = "hf:rvwx:";
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int format = FORMAT_DEFAULT; // to write tar or cpio?
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// parse options
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while (-1 != (c = getopt(argc, argv, pchOpts))) {
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switch (c) {
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case 'f':
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pchArchive = optarg;
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break;
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case 'h':
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usage();
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fprintf(stderr, "-h:\t help\n");
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fprintf(stderr, "-r:\t read archive file\n");
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fprintf(stderr, "-w:\t write archive file\n");
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fprintf(stderr, "-f:\t specify archive file, default stdio\n");
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fprintf(stderr, "-v:\t be verbose\n");
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fprintf(stderr, "-x:\t use format, tar or cpio\n");
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return 0;
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case 'r':
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++fRead;
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break;
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case 'w':
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++fWrite;
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break;
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case 'v':
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++fVerbose;
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break;
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case 'x':
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if (0 == strcmp(optarg, "tar")) {
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format = FORMAT_TAR;
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} else if (0 == strcmp(optarg, "cpio")) {
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format = FORMAT_CPIO;
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} else {
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fprintf(stderr, "%s: unknown format %s\n",
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progname, optarg);
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return 4;
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}
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break;
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case BADCH:
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default:
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usage();
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return 1;
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}
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}
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if (fRead && fWrite) {
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fprintf(stderr, "%s: -r excludes -w\n", progname);
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return 1;
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}
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if (NULL != pchArchive) {
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int mode;
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if (fWrite) {
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// write to archive file instead of stdout
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mode = O_WRONLY | O_CREAT;
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} else {
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// either -r (read) or list
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mode = O_RDONLY;
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}
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pbArchive = bopen(pchArchive, mode);
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} else {
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if (fRead) {
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pbArchive = bfdopen(fileno(stdin), O_RDONLY);
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} else if (fWrite) {
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pbArchive = bfdopen(fileno(stdout), O_WRONLY);
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}
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}
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if (!fRead && !fWrite) {
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// list the archive
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ListArchive(pbArchive);
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return 0;
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}
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if (fRead) {
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ReadArchive(pbArchive);
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return 0;
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}
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if (optind == argc) {
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usage();
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return 1;
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}
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if (FORMAT_DEFAULT == format) {
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fprintf(stderr, "%s: warning: using tar format\n", progname);
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format = FORMAT_TAR;
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}
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WriteArchive(pbArchive, format, &argv[optind], argc - optind);
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return 0;
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}
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