/*
* Mini cpio implementation for busybox
*
- * Copyright (C) 2001 by Glenn McGrath
+ * Copyright (C) 2001 by 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
*
*/
#include <fcntl.h>
-#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "unarchive.h"
#include "busybox.h"
-typedef struct hardlinks_s {
- file_header_t *entry;
- int inode;
- struct hardlinks_s *next;
-} hardlinks_t;
+#define CPIO_OPT_EXTRACT 0x01
+#define CPIO_OPT_TEST 0x02
+#define CPIO_OPT_UNCONDITIONAL 0x04
+#define CPIO_OPT_VERBOSE 0x08
+#define CPIO_OPT_FILE 0x10
+#define CPIO_OPT_CREATE_LEADING_DIR 0x20
+#define CPIO_OPT_PRESERVE_MTIME 0x40
-extern int cpio_main(int argc, char **argv)
+int cpio_main(int argc, char **argv)
{
archive_handle_t *archive_handle;
- int opt;
+ char *cpio_filename = NULL;
+ unsigned long opt;
/* Initialise */
archive_handle = init_handle();
- archive_handle->src_fd = fileno(stdin);
+ archive_handle->src_fd = STDIN_FILENO;
archive_handle->seek = seek_by_char;
- archive_handle->action_header = header_list;
+ archive_handle->flags = ARCHIVE_EXTRACT_NEWER | ARCHIVE_PRESERVE_DATE;
- while ((opt = getopt(argc, argv, "idmuvtF:")) != -1) {
- switch (opt) {
- case 'i': /* extract */
- archive_handle->action_data = data_extract_all;
- break;
- case 'd': /* create _leading_ directories */
- archive_handle->flags |= ARCHIVE_CREATE_LEADING_DIRS;
- break;
- case 'm': /* preserve modification time */
- archive_handle->flags |= ARCHIVE_PRESERVE_DATE;
- break;
- case 'v': /* verbosly list files */
+ opt = bb_getopt_ulflags(argc, argv, "ituvF:dm", &cpio_filename);
+
+ /* One of either extract or test options must be given */
+ if ((opt & (CPIO_OPT_TEST | CPIO_OPT_EXTRACT)) == 0) {
+ bb_show_usage();
+ }
+
+ if (opt & CPIO_OPT_TEST) {
+ /* if both extract and test options are given, ignore extract option */
+ if (opt & CPIO_OPT_EXTRACT) {
+ opt &= ~CPIO_OPT_EXTRACT;
+ }
+ archive_handle->action_header = header_list;
+ }
+ if (opt & CPIO_OPT_EXTRACT) {
+ archive_handle->action_data = data_extract_all;
+ }
+ if (opt & CPIO_OPT_UNCONDITIONAL) {
+ archive_handle->flags |= ARCHIVE_EXTRACT_UNCONDITIONAL;
+ archive_handle->flags &= ~ARCHIVE_EXTRACT_NEWER;
+ }
+ if (opt & CPIO_OPT_VERBOSE) {
+ if (archive_handle->action_header == header_list) {
archive_handle->action_header = header_verbose_list;
- break;
- case 'u': /* unconditional */
- archive_handle->flags |= ARCHIVE_EXTRACT_UNCONDITIONAL;
- break;
- case 't': /* list files */
+ } else {
archive_handle->action_header = header_list;
- break;
- case 'F':
- archive_handle->src_fd = xopen(optarg, O_RDONLY);
- archive_handle->seek = seek_by_jump;
- break;
- default:
- show_usage();
}
}
+ if (cpio_filename) { /* CPIO_OPT_FILE */
+ archive_handle->src_fd = bb_xopen(cpio_filename, O_RDONLY);
+ archive_handle->seek = seek_by_jump;
+ }
+ if (opt & CPIO_OPT_CREATE_LEADING_DIR) {
+ archive_handle->flags |= ARCHIVE_CREATE_LEADING_DIRS;
+ }
while (optind < argc) {
archive_handle->filter = filter_accept_list;
- archive_handle->accept = add_to_list(archive_handle->accept, argv[optind]);
+ llist_add_to(&(archive_handle->accept), argv[optind]);
optind++;
}
- while (1) {
- static hardlinks_t *saved_hardlinks = NULL;
- static unsigned short pending_hardlinks = 0;
- file_header_t *file_header = archive_handle->file_header;
- char cpio_header[110];
- int namesize;
- char dummy[16];
- int major, minor, nlink, inode;
- char extract_flag;
-
- if (pending_hardlinks) { /* Deal with any pending hardlinks */
- hardlinks_t *tmp;
- hardlinks_t *oldtmp;
-
- tmp = saved_hardlinks;
- oldtmp = NULL;
-
- while (tmp) {
- error_msg_and_die("need to fix this\n");
- if (tmp->entry->link_name) { /* Found a hardlink ready to be extracted */
- file_header = tmp->entry;
- if (oldtmp) {
- oldtmp->next = tmp->next; /* Remove item from linked list */
- } else {
- saved_hardlinks = tmp->next;
- }
- free(tmp);
- continue;
- }
- oldtmp = tmp;
- tmp = tmp->next;
- }
- pending_hardlinks = 0; /* No more pending hardlinks, read next file entry */
- }
-
- /* There can be padding before archive header */
- data_align(archive_handle, 4);
-
- if (archive_xread_all_eof(archive_handle, cpio_header, 110) == 0) {
- return(EXIT_FAILURE);
- }
- archive_handle->offset += 110;
-
- if (strncmp(&cpio_header[0], "07070", 5) != 0) {
- printf("cpio header is %x-%x-%x-%x-%x\n",
- cpio_header[0],
- cpio_header[1],
- cpio_header[2],
- cpio_header[3],
- cpio_header[4]);
- error_msg_and_die("Unsupported cpio format");
- }
-
- if ((cpio_header[5] != '1') && (cpio_header[5] != '2')) {
- error_msg_and_die("Unsupported cpio format, use newc or crc");
- }
-
- sscanf(cpio_header, "%6c%8x%8x%8x%8x%8x%8lx%8lx%16c%8x%8x%8x%8c",
- dummy, &inode, (unsigned int*)&file_header->mode,
- (unsigned int*)&file_header->uid, (unsigned int*)&file_header->gid,
- &nlink, &file_header->mtime, &file_header->size,
- dummy, &major, &minor, &namesize, dummy);
-
- file_header->name = (char *) xmalloc(namesize + 1);
- archive_xread_all(archive_handle, file_header->name, namesize); /* Read in filename */
- file_header->name[namesize] = '\0';
- archive_handle->offset += namesize;
-
- /* Update offset amount and skip padding before file contents */
- data_align(archive_handle, 4);
-
- if (strcmp(file_header->name, "TRAILER!!!") == 0) {
- printf("%d blocks\n", (int) (archive_handle->offset % 512 ? (archive_handle->offset / 512) + 1 : archive_handle->offset / 512)); /* Always round up */
- if (saved_hardlinks) { /* Bummer - we still have unresolved hardlinks */
- hardlinks_t *tmp = saved_hardlinks;
- hardlinks_t *oldtmp = NULL;
- while (tmp) {
- error_msg("%s not created: cannot resolve hardlink", tmp->entry->name);
- oldtmp = tmp;
- tmp = tmp->next;
- free (oldtmp->entry->name);
- free (oldtmp->entry);
- free (oldtmp);
- }
- saved_hardlinks = NULL;
- pending_hardlinks = 0;
- }
- return(EXIT_FAILURE);
- }
-
- if (S_ISLNK(file_header->mode)) {
- file_header->link_name = (char *) xmalloc(file_header->size + 1);
- archive_xread_all(archive_handle, file_header->link_name, file_header->size);
- file_header->link_name[file_header->size] = '\0';
- archive_handle->offset += file_header->size;
- file_header->size = 0; /* Stop possible seeks in future */
- }
- if (nlink > 1 && !S_ISDIR(file_header->mode)) {
- if (file_header->size == 0) { /* Put file on a linked list for later */
- hardlinks_t *new = xmalloc(sizeof(hardlinks_t));
- new->next = saved_hardlinks;
- new->inode = inode;
- new->entry = file_header;
- saved_hardlinks = new;
- continue;
- } else { /* Found the file with data in */
- hardlinks_t *tmp = saved_hardlinks;
- pending_hardlinks = 1;
- while (tmp) {
- if (tmp->inode == inode) {
- tmp->entry->link_name = xstrdup(file_header->name);
- nlink--;
- }
- tmp = tmp->next;
- }
- if (nlink > 1) {
- error_msg("error resolving hardlink: did you create the archive with GNU cpio 2.0-2.2?");
- }
- }
- }
- file_header->device = (major << 8) | minor;
-
- extract_flag = FALSE;
- if (archive_handle->filter(archive_handle->accept, archive_handle->reject, file_header->name) == EXIT_SUCCESS) {
- struct stat statbuf;
-
- extract_flag = TRUE;
-
- /* Check if the file already exists */
- if (lstat (file_header->name, &statbuf) == 0) {
- if ((archive_handle->flags & ARCHIVE_EXTRACT_UNCONDITIONAL) || (statbuf.st_mtime < file_header->mtime)) {
- /* Remove file if flag set or its older than the file to be extracted */
- if (unlink(file_header->name) == -1) {
- perror_msg_and_die("Couldnt remove old file");
- }
- } else {
- if (! archive_handle->flags & ARCHIVE_EXTRACT_QUIET) {
- error_msg("%s not created: newer or same age file exists", file_header->name);
- }
- extract_flag = FALSE;
- }
- }
- archive_handle->action_header(file_header);
- }
-
- archive_handle->action_header(file_header);
- if (extract_flag) {
- archive_handle->action_data(archive_handle);
- } else {
- data_skip(archive_handle);
- }
- archive_handle->offset += file_header->size;
- }
+ while (get_header_cpio(archive_handle) == EXIT_SUCCESS);
return(EXIT_SUCCESS);
}
-
projects / oweals / busybox.git / blobdiff