mirror of
https://github.com/sheumann/hush.git
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66 lines
1.7 KiB
C
66 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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{
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char *filename;
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unsigned long opt;
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int status, src_fd, dst_fd;
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opt = bb_getopt_ulflags(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) && (filename[0] != '-') && (filename[1] != '\0')) {
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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) || bb_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) 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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