* Originally adjusted for busybox by Sven Rudolph <sr1@inf.tu-dresden.de>
* based on gzip sources
*
- * Adjusted further by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
- * to support files as well as stdin/stdout, and to generally behave itself wrt
- * command line handling.
+ * Adjusted further by Erik Andersen <andersen@codepoet.org> to support files as
+ * well as stdin/stdout, and to generally behave itself wrt command line
+ * handling.
*
* General cleanup to better adhere to the style guide and make use of standard
- * busybox functions by Glenn McGrath <bug1@optushome.com.au>
- *
+ * busybox functions by Glenn McGrath <bug1@iinet.net.au>
+ *
* 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
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
-#include <getopt.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
#include "busybox.h"
+#include "unarchive.h"
+
+#define GUNZIP_OPT_STDOUT 1
+#define GUNZIP_OPT_FORCE 2
+#define GUNZIP_OPT_TEST 4
+#define GUNZIP_OPT_DECOMPRESS 8
-extern int gunzip_main(int argc, char **argv)
+int gunzip_main(int argc, char **argv)
{
- FILE *in_file = stdin;
- FILE *out_file = NULL;
- struct stat stat_buf;
+ char status = EXIT_SUCCESS;
+ unsigned long opt;
- char *if_name = NULL;
- char *of_name = NULL;
- char *delete_file_name = NULL;
+ opt = bb_getopt_ulflags(argc, argv, "cftd");
+ /* if called as zcat */
+ if (strcmp(bb_applet_name, "zcat") == 0) {
+ opt |= GUNZIP_OPT_STDOUT;
+ }
- const int gunzip_to_stdout = 1;
- const int gunzip_force = 2;
- const int gunzip_test = 4;
+ do {
+ struct stat stat_buf;
+ const char *old_path = argv[optind];
+ const char *delete_path = NULL;
+ char *new_path = NULL;
+ int src_fd;
+ int dst_fd;
- int flags = 0;
- int opt = 0;
- int delete_old_file = FALSE;
+ optind++;
- /* if called as zcat */
- if (strcmp(applet_name, "zcat") == 0)
- flags |= gunzip_to_stdout;
-
- while ((opt = getopt(argc, argv, "ctfhdq")) != -1) {
- switch (opt) {
- case 'c':
- flags |= gunzip_to_stdout;
- break;
- case 'f':
- flags |= gunzip_force;
- break;
- case 't':
- flags |= gunzip_test;
- break;
- case 'd': /* Used to convert gzip to gunzip. */
- break;
- case 'q':
- error_msg("-q option not supported, ignored");
- break;
- case 'h':
- default:
- show_usage(); /* exit's inside usage */
+ if (old_path == NULL || strcmp(old_path, "-") == 0) {
+ src_fd = STDIN_FILENO;
+ opt |= GUNZIP_OPT_STDOUT;
+ } else {
+ src_fd = bb_xopen(old_path, O_RDONLY);
+
+ /* Get the time stamp on the input file. */
+ xstat(old_path, &stat_buf);
}
- }
- /* Set input filename and number */
- if (argv[optind] == NULL || strcmp(argv[optind], "-") == 0) {
- flags |= gunzip_to_stdout;
- } else {
- if_name = strdup(argv[optind]);
- /* Open input file */
- in_file = xfopen(if_name, "r");
-
- /* Get the time stamp on the input file. */
- if (stat(if_name, &stat_buf) < 0) {
- error_msg_and_die("Couldn't stat file %s", if_name);
+ /* Check that the input is sane. */
+ if (isatty(src_fd) && ((opt & GUNZIP_OPT_FORCE) == 0)) {
+ bb_error_msg_and_die
+ ("compressed data not read from terminal. Use -f to force it.");
}
- }
- /* Check that the input is sane. */
- if (isatty(fileno(in_file)) && (flags & gunzip_force) == 0)
- error_msg_and_die("compressed data not read from terminal. Use -f to force it.");
-
- /* Set output filename and number */
- if (flags & gunzip_test) {
- out_file = xfopen("/dev/null", "w"); /* why does test use filenum 2 ? */
- } else if (flags & gunzip_to_stdout) {
- out_file = stdout;
- } else {
- char *extension;
- int length = strlen(if_name);
-
- delete_old_file = TRUE;
- extension = strrchr(if_name, '.');
- if (extension && strcmp(extension, ".gz") == 0) {
- length -= 3;
- } else if (extension && strcmp(extension, ".tgz") == 0) {
- length -= 4;
+ /* Set output filename and number */
+ if (opt & GUNZIP_OPT_TEST) {
+ dst_fd = bb_xopen(bb_dev_null, O_WRONLY); /* why does test use filenum 2 ? */
+ } else if (opt & GUNZIP_OPT_STDOUT) {
+ dst_fd = STDOUT_FILENO;
} else {
- error_msg_and_die("Invalid extension");
+ char *extension;
+
+ new_path = bb_xstrdup(old_path);
+
+ extension = strrchr(new_path, '.');
+#ifdef CONFIG_FEATURE_GUNZIP_UNCOMPRESS
+ if (extension && (strcmp(extension, ".Z") == 0)) {
+ *extension = '\0';
+ } else
+#endif
+ if (extension && (strcmp(extension, ".gz") == 0)) {
+ *extension = '\0';
+ } else if (extension && (strcmp(extension, ".tgz") == 0)) {
+ extension[2] = 'a';
+ extension[3] = 'r';
+ } else {
+ bb_error_msg_and_die("Invalid extension");
+ }
+
+ /* Open output file */
+ dst_fd = bb_xopen(new_path, O_WRONLY | O_CREAT);
+
+ /* Set permissions on the file */
+ chmod(new_path, stat_buf.st_mode);
+
+ /* If unzip succeeds remove the old file */
+ delete_path = old_path;
}
- of_name = (char *) xcalloc(sizeof(char), length + 1);
- strncpy(of_name, if_name, length);
- /* Open output file */
- out_file = xfopen(of_name, "w");
+ /* do the decompression, and cleanup */
+ if (bb_xread_char(src_fd) == 0x1f) {
+ unsigned char magic2;
- /* Set permissions on the file */
- chmod(of_name, stat_buf.st_mode);
- }
+ magic2 = bb_xread_char(src_fd);
+#ifdef CONFIG_FEATURE_GUNZIP_UNCOMPRESS
+ if (magic2 == 0x9d) {
+ status = uncompress(src_fd, dst_fd);
+ } else
+#endif
+ if (magic2 == 0x8b) {
+ check_header_gzip(src_fd);
+ status = inflate_gunzip(src_fd, dst_fd);
+ if (status != 0) {
+ bb_error_msg_and_die("Error inflating");
+ }
+ } else {
+ bb_error_msg_and_die("Invalid magic");
+ }
+ } else {
+ bb_error_msg_and_die("Invalid magic");
+ }
- /* do the decompression, and cleanup */
- if (unzip(in_file, out_file) == 0) {
- /* Success, remove .gz file */
- delete_file_name = if_name;
- } else {
- /* remove failed attempt */
- delete_file_name = of_name;
- }
+ if ((status != EXIT_SUCCESS) && (new_path)) {
+ /* Unzip failed, remove new path instead of old path */
+ delete_path = new_path;
+ }
- fclose(out_file);
- fclose(in_file);
+ if (dst_fd != STDOUT_FILENO) {
+ close(dst_fd);
+ }
+ if (src_fd != STDIN_FILENO) {
+ close(src_fd);
+ }
- if (delete_old_file == TRUE) {
- if (unlink(delete_file_name) < 0) {
- error_msg_and_die("Couldnt remove %s", delete_file_name);
+ /* 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(of_name);
+ free(new_path);
+
+ } while (optind < argc);
- return(EXIT_SUCCESS);
+ return status;
}
projects / oweals / busybox.git / blobdiff