1 files changed, 115 insertions, 0 deletions

diff --git a/busybox/archival/uncompress.c b/busybox/archival/uncompress.c
new file mode 100644
index 000000000..48b4e2cad
--- /dev/null
+++ b/busybox/archival/uncompress.c
@@ -0,0 +1,115 @@
+/* vi: set sw=4 ts=4: */
+/*
+ *      Uncompress applet for busybox (c) 2002 Glenn McGrath
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "libbb.h"
+#include "unarchive.h"
+
+#define GUNZIP_TO_STDOUT        1
+#define GUNZIP_FORCE    2
+
+extern int uncompress_main(int argc, char **argv)
+{
+        int status = EXIT_SUCCESS;
+        unsigned long flags;
+
+        flags = bb_getopt_ulflags(argc, argv, "cf");
+
+        while (optind < argc) {
+                const char *compressed_file = argv[optind++];
+                const char *delete_path = NULL;
+                char *uncompressed_file = NULL;
+                int src_fd;
+                int dst_fd;
+
+                if (strcmp(compressed_file, "-") == 0) {
+                        src_fd = STDIN_FILENO;
+                        flags |= GUNZIP_TO_STDOUT;
+                } else {
+                        src_fd = bb_xopen(compressed_file, O_RDONLY);
+                }
+
+                /* Check that the input is sane.  */
+                if (isatty(src_fd) && ((flags & GUNZIP_FORCE) == 0)) {
+                        bb_error_msg_and_die
+                                ("compressed data not read from terminal.  Use -f to force it.");
+                }
+
+                /* Set output filename and number */
+                if (flags & GUNZIP_TO_STDOUT) {
+                        dst_fd = STDOUT_FILENO;
+                } else {
+                        struct stat stat_buf;
+                        char *extension;
+
+                        uncompressed_file = bb_xstrdup(compressed_file);
+
+                        extension = strrchr(uncompressed_file, '.');
+                        if (!extension || (strcmp(extension, ".Z") != 0)) {
+                                bb_error_msg_and_die("Invalid extension");
+                        }
+                        *extension = '\0';
+
+                        /* Open output file */
+                        dst_fd = bb_xopen(uncompressed_file, O_WRONLY | O_CREAT);
+
+                        /* Set permissions on the file */
+                        stat(compressed_file, &stat_buf);
+                        chmod(uncompressed_file, stat_buf.st_mode);
+
+                        /* If unzip succeeds remove the old file */
+                        delete_path = compressed_file;
+                }
+
+                /* do the decompression, and cleanup */
+                if ((bb_xread_char(src_fd) != 0x1f) || (bb_xread_char(src_fd) != 0x9d)) {
+                        bb_error_msg_and_die("Invalid magic");
+                }
+
+                status = uncompress(src_fd, dst_fd);
+
+                if ((status != EXIT_SUCCESS) && (uncompressed_file)) {
+                        /* Unzip failed, remove the uncomressed file instead of compressed file */
+                        delete_path = uncompressed_file;
+                }
+
+                if (dst_fd != STDOUT_FILENO) {
+                        close(dst_fd);
+                }
+                if (src_fd != STDIN_FILENO) {
+                        close(src_fd);
+                }
+
+                /* delete_path will be NULL if in test mode or from stdin */
+                if (delete_path && (unlink(delete_path) == -1)) {
+                        bb_error_msg_and_die("Couldn't remove %s", delete_path);
+                }
+
+                free(uncompressed_file);
+        }
+
+        return status;
+}