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[oweals/busybox.git] / archival / uncompress.c

diff --git a/archival/uncompress.c b/archival/uncompress.c
index 2d2145d18bc541a1ca39f581a04f6198063da211..48b4e2cad5ab1f67a707d721cd425b0448186c0f 100644 (file)
--- a/archival/uncompress.c
+++ b/archival/uncompress.c
@@ -28,95 +28,78 @@
 #include "libbb.h"
 #include "unarchive.h"
 
-int uncompress_main(int argc, char **argv)
+#define GUNZIP_TO_STDOUT       1
+#define GUNZIP_FORCE   2
+
+extern int uncompress_main(int argc, char **argv)
 {
-       const char gunzip_to_stdout = 1;
-       const char gunzip_force = 2;
-       char status = EXIT_SUCCESS;
-       char flags = 0;
-       int opt;
-
-       while ((opt = getopt(argc, argv, "cfh")) != -1) {
-               switch (opt) {
-               case 'c':
-                       flags |= gunzip_to_stdout;
-                       break;
-               case 'f':
-                       flags |= gunzip_force;
-                       break;
-               default:
-                       bb_show_usage();        /* exit's inside usage */
-               }
-       }
+       int status = EXIT_SUCCESS;
+       unsigned long flags;
 
-       do {
-               struct stat stat_buf;
-               const char *old_path = argv[optind];
+       flags = bb_getopt_ulflags(argc, argv, "cf");
+
+       while (optind < argc) {
+               const char *compressed_file = argv[optind++];
                const char *delete_path = NULL;
-               char *new_path = NULL;
+               char *uncompressed_file = NULL;
                int src_fd;
                int dst_fd;
 
-               optind++;
-
-               if (old_path == NULL || strcmp(old_path, "-") == 0) {
-                       src_fd = fileno(stdin);
-                       flags |= gunzip_to_stdout;
+               if (strcmp(compressed_file, "-") == 0) {
+                       src_fd = STDIN_FILENO;
+                       flags |= GUNZIP_TO_STDOUT;
                } else {
-                       src_fd = bb_xopen(old_path, O_RDONLY);
-
-                       /* Get the time stamp on the input file. */
-                       if (stat(old_path, &stat_buf) < 0) {
-                               bb_error_msg_and_die("Couldn't stat file %s", old_path);
-                       }
+                       src_fd = bb_xopen(compressed_file, O_RDONLY);
                }
 
                /* Check that the input is sane.  */
-               if (isatty(src_fd) && ((flags & gunzip_force) == 0)) {
+               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 = fileno(stdout);
+               if (flags & GUNZIP_TO_STDOUT) {
+                       dst_fd = STDOUT_FILENO;
                } else {
+                       struct stat stat_buf;
                        char *extension;
 
-                       new_path = bb_xstrdup(old_path);
+                       uncompressed_file = bb_xstrdup(compressed_file);
 
-                       extension = strrchr(new_path, '.');
+                       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(new_path, O_WRONLY | O_CREAT);
+                       dst_fd = bb_xopen(uncompressed_file, O_WRONLY | O_CREAT);
 
                        /* Set permissions on the file */
-                       chmod(new_path, stat_buf.st_mode);
+                       stat(compressed_file, &stat_buf);
+                       chmod(uncompressed_file, stat_buf.st_mode);
 
                        /* If unzip succeeds remove the old file */
-                       delete_path = old_path;
+                       delete_path = compressed_file;
                }
 
                /* do the decompression, and cleanup */
-               if ((bb_xread_char(src_fd) == 0x1f) && (bb_xread_char(src_fd) == 0x9d)) {
-                       status = uncompress(src_fd, dst_fd);
-               } else {
+               if ((bb_xread_char(src_fd) != 0x1f) || (bb_xread_char(src_fd) != 0x9d)) {
                        bb_error_msg_and_die("Invalid magic");
                }
 
-               if ((status != EXIT_SUCCESS) && (new_path)) {
-                       /* Unzip failed, remove new path instead of old path */
-                       delete_path = new_path;
+               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 != fileno(stdout)) {
+               if (dst_fd != STDOUT_FILENO) {
                        close(dst_fd);
                }
-               if (src_fd != fileno(stdin)) {
+               if (src_fd != STDIN_FILENO) {
                        close(src_fd);
                }
 
@@ -125,9 +108,8 @@ int uncompress_main(int argc, char **argv)
                        bb_error_msg_and_die("Couldn't remove %s", delete_path);
                }
 
-               free(new_path);
-
-       } while (optind < argc);
+               free(uncompressed_file);
+       }
 
        return status;
 }