68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Modified for busybox by Glenn McGrath <bug1@iinet.net.au>
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* Added support output to stdout by Thomas Lundquist <thomasez@zelow.no>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include "busybox.h"
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#include "unarchive.h"
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#define BUNZIP2_OPT_STDOUT 1
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#define BUNZIP2_OPT_FORCE 2
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int bunzip2_main(int argc, char **argv);
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int bunzip2_main(int argc, char **argv)
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{
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USE_DESKTOP(long long) int status;
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char *filename;
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unsigned opt;
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int src_fd, dst_fd;
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opt = getopt32(argc, argv, "cf");
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/* Set input filename and number */
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filename = argv[optind];
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if (filename && NOT_LONE_DASH(filename)) {
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/* Open input file */
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src_fd = xopen(filename, O_RDONLY);
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} else {
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src_fd = STDIN_FILENO;
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filename = 0;
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}
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/* if called as bzcat force the stdout flag */
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if ((opt & BUNZIP2_OPT_STDOUT) || applet_name[2] == 'c')
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filename = 0;
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/* Check that the input is sane. */
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if (isatty(src_fd) && (opt & BUNZIP2_OPT_FORCE) == 0) {
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bb_error_msg_and_die("compressed data not read from terminal, "
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"use -f to force it");
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}
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if (filename) {
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struct stat stat_buf;
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/* extension = filename+strlen(filename)-4 is buggy:
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* strlen may be less than 4 */
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char *extension = strrchr(filename, '.');
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if (!extension || strcmp(extension, ".bz2") != 0) {
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bb_error_msg_and_die("invalid extension");
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}
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xstat(filename, &stat_buf);
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*extension = '\0';
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dst_fd = xopen3(filename, O_WRONLY | O_CREAT | O_TRUNC,
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stat_buf.st_mode);
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} else dst_fd = STDOUT_FILENO;
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status = uncompressStream(src_fd, dst_fd);
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if (filename) {
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if (status >= 0) filename[strlen(filename)] = '.';
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if (unlink(filename) < 0) {
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bb_error_msg_and_die("cannot remove %s", filename);
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}
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}
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return status;
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}
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