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New common unarchive code.

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This commit is contained in:
Glenn L McGrath
2002-09-25 02:47:48 +00:00
parent ecfa290cfd
commit 7ca04f328e
36 changed files with 2436 additions and 1914 deletions
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40
archival/gunzip.c
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@ -64,7 +64,12 @@ static char *license_msg[] = {
#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;
@ -100,23 +105,20 @@ extern int gunzip_main(int argc, char **argv)
}
do {
FILE *in_file, *out_file;
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;
optind++;
if (old_path == NULL || strcmp(old_path, "-") == 0) {
in_file = stdin;
src_fd = fileno(stdin);
flags |= gunzip_to_stdout;
} else {
in_file = wfopen(old_path, "r");
if (in_file == NULL) {
status = EXIT_FAILURE;
break;
}
src_fd = xopen(old_path, O_RDONLY);
/* Get the time stamp on the input file. */
if (stat(old_path, &stat_buf) < 0) {
@ -125,16 +127,16 @@ extern int gunzip_main(int argc, char **argv)
}
/* Check that the input is sane. */
if (isatty(fileno(in_file)) && ((flags & gunzip_force) == 0)) {
if (isatty(src_fd) && ((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 ? */
dst_fd = 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;
@ -151,7 +153,7 @@ extern int gunzip_main(int argc, char **argv)
}
/* Open output file */
out_file = xfopen(new_path, "w");
dst_fd = xopen(new_path, O_WRONLY | O_CREAT);
/* Set permissions on the file */
chmod(new_path, stat_buf.st_mode);
@ -161,16 +163,22 @@ extern int gunzip_main(int argc, char **argv)
}
/* do the decompression, and cleanup */
if ((unzip(in_file, out_file) != 0) && (new_path)) {
check_header_gzip(src_fd);
if (inflate(src_fd, dst_fd) != 0) {
error_msg("Error inflating");
}
check_trailer_gzip(src_fd);
if ((status != EXIT_SUCCESS) && (new_path)) {
/* Unzip failed, remove new path instead of old path */
delete_path = new_path;
}
if (out_file != stdout) {
fclose(out_file);
if (dst_fd != fileno(stdout)) {
close(dst_fd);
}
if (in_file != stdin) {
fclose(in_file);
if (src_fd != fileno(stdin)) {
close(src_fd);
}
/* delete_path will be NULL if in test mode or from stdin */