* Originally adjusted for busybox by Sven Rudolph <sr1@inf.tu-dresden.de>
* based on gzip sources
*
- * Adjusted further by Erik Andersen <andersee@debian.org> to support files as
+ * 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.
*
#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"
+
+const char gunzip_to_stdout = 1;
+const char gunzip_force = 2;
+const char gunzip_test = 4;
extern int gunzip_main(int argc, char **argv)
{
- int flags = 0;
- int opt = 0;
- int delete_old_file, file_count;
- struct stat stat_buf;
- FILE *in_file, *out_file;
- char *if_name, *of_name, *delete_file_name;
- const int gunzip_to_stdout = 1;
- const int gunzip_force = 2;
- const int gunzip_test = 4;
- const int gunzip_verbose = 8;
+ char status = EXIT_SUCCESS;
+ char flags = 0;
+ int opt;
/* if called as zcat */
- if (strcmp(applet_name, "zcat") == 0)
+ if (strcmp(bb_applet_name, "zcat") == 0) {
flags |= gunzip_to_stdout;
+ }
- while ((opt = getopt(argc, argv, "ctfhdqv")) != -1) {
+ while ((opt = getopt(argc, argv, "ctfhd")) != -1) {
switch (opt) {
case 'c':
flags |= gunzip_to_stdout;
case 't':
flags |= gunzip_test;
break;
- case 'v':
- flags |= gunzip_verbose;
- break;
- case 'd': /* Used to convert gzip to gunzip. */
+ 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 */
+ bb_show_usage(); /* exit's inside usage */
}
}
- file_count = argc - optind;
- while (file_count==0 || optind < argc) {
- in_file = stdin;
- out_file = NULL;
- if_name = NULL;
- of_name = NULL;
- delete_file_name = NULL;
- delete_old_file = FALSE;
-
- /* Set input filename and number */
- if (argv[optind] == NULL || strcmp(argv[optind], "-") == 0) {
- flags |= gunzip_to_stdout;
- /* Skip to the end */
- optind = argc;
- } else {
- if_name = strdup(argv[optind]);
- /* Open input file */
- in_file = xfopen(if_name, "r");
+ 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;
- if (flags & gunzip_verbose) {
- fprintf(stderr, "%s:\t", if_name);
- }
+ optind++;
- /* set the buffer size */
- setvbuf(in_file, NULL, _IOFBF, 0x8000);
+ if (old_path == NULL || strcmp(old_path, "-") == 0) {
+ src_fd = fileno(stdin);
+ flags |= gunzip_to_stdout;
+ } else {
+ src_fd = bb_xopen(old_path, O_RDONLY);
/* 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);
+ if (stat(old_path, &stat_buf) < 0) {
+ bb_error_msg_and_die("Couldn't stat file %s", old_path);
}
}
/* 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.");
+ 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_test) {
- out_file = xfopen("/dev/null", "w"); /* why does test use filenum 2 ? */
+ dst_fd = bb_xopen("/dev/null", O_WRONLY); /* why does test use filenum 2 ? */
} else if (flags & gunzip_to_stdout) {
- out_file = stdout;
+ dst_fd = fileno(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;
+
+ 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 {
- error_msg_and_die("Invalid extension");
+ bb_error_msg_and_die("Invalid extension");
}
- of_name = (char *) xcalloc(sizeof(char), length + 1);
- strncpy(of_name, if_name, length);
/* Open output file */
- out_file = xfopen(of_name, "w");
+ dst_fd = bb_xopen(new_path, O_WRONLY | O_CREAT);
/* Set permissions on the file */
- chmod(of_name, stat_buf.st_mode);
+ chmod(new_path, stat_buf.st_mode);
+
+ /* If unzip succeeds remove the old file */
+ delete_path = old_path;
}
/* do the decompression, and cleanup */
- if (unzip(in_file, out_file) == 0) {
- /* Success, remove .gz file */
- delete_file_name = if_name;
- if (flags & gunzip_verbose) {
- fprintf(stderr, "OK\n");
- }
+ if (bb_xread_char(src_fd) == 0x1f) {
+ unsigned char magic2;
+
+ 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 {
- /* remove failed attempt */
- delete_file_name = of_name;
+ bb_error_msg_and_die("Invalid magic");
}
- fclose(out_file);
- fclose(in_file);
+ if ((status != EXIT_SUCCESS) && (new_path)) {
+ /* Unzip failed, remove new path instead of old path */
+ delete_path = new_path;
+ }
- if (delete_old_file == TRUE && !(flags & gunzip_test)) {
- if (unlink(delete_file_name) < 0) {
- error_msg_and_die("Couldnt remove %s", delete_file_name);
- }
+ if (dst_fd != fileno(stdout)) {
+ close(dst_fd);
+ }
+ if (src_fd != fileno(stdin)) {
+ close(src_fd);
}
- free(of_name);
- optind++;
- } /* while () */
+ /* 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);
+ }
- return(EXIT_SUCCESS);
-}
+ free(new_path);
+
+ } while (optind < argc);
+ return status;
+}