/* vi: set sw=4 ts=4: */
/*
- * Mini ar implementation for busybox
+ * Mini ar implementation for busybox
*
* Copyright (C) 2000 by Glenn McGrath
- * Written by Glenn McGrath <bug1@optushome.com.au> 1 June 2000
- *
+ * Written by Glenn McGrath <bug1@iinet.net.au> 1 June 2000
+ *
* Based in part on BusyBox tar, Debian dpkg-deb and GNU ar.
*
* This program is free software; you can redistribute it and/or modify
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
+ * There is no single standard to adhere to so ar may not portable
+ * between different systems
+ * http://www.unix-systems.org/single_unix_specification_v2/xcu/ar.html
*/
+
#include <fcntl.h>
-#include "busybox.h"
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <utime.h>
+#include <unistd.h>
-typedef struct ar_headers_s {
- char *name;
- size_t size;
- uid_t uid;
- gid_t gid;
- mode_t mode;
- time_t mtime;
- off_t offset;
- struct ar_headers_s *next;
-} ar_headers_t;
+#include "unarchive.h"
+#include "busybox.h"
-/*
- * return the headerL_t struct for the filename descriptor
- */
-extern ar_headers_t get_headers(int srcFd)
+static void header_verbose_list_ar(const file_header_t *file_header)
{
- typedef struct raw_ar_header_s { /* Byte Offset */
- char name[16]; /* 0-15 */
- char date[12]; /* 16-27 */
- char uid[6];
- char gid[6]; /* 28-39 */
- char mode[8]; /* 40-47 */
- char size[10]; /* 48-57 */
- char fmag[2]; /* 58-59 */
- } raw_ar_header_t;
- raw_ar_header_t raw_ar_header;
-
- ar_headers_t *head, *entry;
- char ar_magic[8];
- char *long_name=NULL;
-
- head = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
- entry = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
-
- /* check ar magic */
- if (full_read(srcFd, ar_magic, 8) != 8)
- error_msg_and_die("cannot read magic\n");
- if (strncmp(ar_magic,"!<arch>",7) != 0)
- error_msg_and_die("invalid magic\n");
-
- while (full_read(srcFd, (char *) &raw_ar_header, 60)==60) {
- /* check the end of header markers are valid */
- if ((raw_ar_header.fmag[0]!='`') || (raw_ar_header.fmag[1]!='\n')) {
- char newline[1];
- if (raw_ar_header.fmag[1]!='`') {
- break;
- }
- /* some version of ar, have an extra '\n' after each entry */
- read(srcFd, newline, 1);
- if (newline[0]!='\n') {
- break;
- }
- /* fix up the header, we started reading 1 byte too early due to a '\n' */
- memmove((char *) &raw_ar_header, (char *)&raw_ar_header+1, 59);
- /* dont worry about adding the last '\n', we dont need it now */
- }
-
- entry->size = (size_t) atoi(raw_ar_header.size);
- /* long filenames have '/' as the first character */
- if (raw_ar_header.name[0] == '/') {
- if (raw_ar_header.name[1] == '/') {
- /* multiple long filenames are stored as data in one entry */
- long_name = (char *) xrealloc(long_name, entry->size);
- full_read(srcFd, long_name, entry->size);
- continue;
- }
- else {
- /* The number after the '/' indicates the offset in the ar data section
- (saved in variable long_name) that conatains the real filename */
- const int long_name_offset = (int) atoi((char *) &raw_ar_header.name[1]);
- entry->name = xmalloc(strlen(&long_name[long_name_offset]));
- strcpy(entry->name, &long_name[long_name_offset]);
- }
- }
- else {
- /* short filenames */
- entry->name = xmalloc(16);
- strncpy(entry->name, raw_ar_header.name, 16);
- }
- entry->name[strcspn(entry->name, " /")]='\0';
+ const char *mode = bb_mode_string(file_header->mode);
+ char *mtime;
- /* convert the rest of the now valid char header to its typed struct */
- parse_mode(raw_ar_header.mode, &entry->mode);
- entry->mtime = atoi(raw_ar_header.date);
- entry->uid = atoi(raw_ar_header.uid);
- entry->gid = atoi(raw_ar_header.gid);
- entry->offset = lseek(srcFd, 0, SEEK_CUR);
-
- /* add this entries header to our combined list */
- entry->next = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
- *entry->next = *head;
- *head = *entry;
- lseek(srcFd, (off_t) entry->size, SEEK_CUR);
- }
- return(*head);
+ mtime = ctime(&file_header->mtime);
+ mtime[16] = ' ';
+ memmove(&mtime[17], &mtime[20], 4);
+ mtime[21] = '\0';
+ printf("%s %d/%d%7d %s %s\n", &mode[1], file_header->uid, file_header->gid, (int) file_header->size, &mtime[4], file_header->name);
}
+#define AR_CTX_PRINT 1
+#define AR_CTX_LIST 2
+#define AR_CTX_EXTRACT 4
+#define AR_OPT_PRESERVE_DATE 8
+#define AR_OPT_VERBOSE 16
+
extern int ar_main(int argc, char **argv)
{
- const int preserve_date = 1; /* preserve original dates */
- const int verbose = 2; /* be verbose */
- const int display = 4; /* display contents */
- const int extract_to_file = 8; /* extract contents of archive */
- const int extract_to_stdout = 16; /* extract to stdout */
+ archive_handle_t *archive_handle;
+ unsigned long opt;
+ char magic[8];
- int funct = 0, opt=0;
- int srcFd=0, dstFd=0;
+ archive_handle = init_handle();
- ar_headers_t head, *extract_list=NULL;
+ bb_opt_complementaly = "p~tx:t~px:x~pt";
+ opt = bb_getopt_ulflags(argc, argv, "ptxov");
- extract_list = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
+ if ((opt & 0x80000000UL) || (optind == argc)) {
+ bb_show_usage();
+ }
- while ((opt = getopt(argc, argv, "ovtpx")) != -1) {
- switch (opt) {
- case 'o':
- funct |= preserve_date;
- break;
- case 'v':
- funct |= verbose;
- break;
- case 't':
- funct |= display;
- break;
- case 'p':
- funct |= extract_to_stdout;
- break;
- case 'x':
- funct |= extract_to_file;
- break;
- default:
- usage(ar_usage);
- }
+ if (opt & AR_CTX_PRINT) {
+ archive_handle->action_data = data_extract_to_stdout;
+ }
+ if (opt & AR_CTX_LIST) {
+ archive_handle->action_header = header_list;
+ }
+ if (opt & AR_CTX_EXTRACT) {
+ archive_handle->action_data = data_extract_all;
+ }
+ if (opt & AR_OPT_PRESERVE_DATE) {
+ archive_handle->flags |= ARCHIVE_PRESERVE_DATE;
+ }
+ if (opt & AR_OPT_VERBOSE) {
+ archive_handle->action_header = header_verbose_list_ar;
}
-
- /* check the src filename was specified */
- if (optind == argc)
- usage(ar_usage);
-
- if ( (srcFd = open(argv[optind], O_RDONLY)) < 0)
- error_msg_and_die("Cannot read %s\n", argv[optind]);
- optind++;
- head = get_headers(srcFd);
+ archive_handle->src_fd = bb_xopen(argv[optind++], O_RDONLY);
- /* find files to extract or display */
- /* search through argv and build extract list */
- for (;optind<argc; optind++) {
- ar_headers_t *ar_entry;
- ar_entry = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
- ar_entry = &head;
- while (ar_entry->next != NULL) {
- if (strcmp(argv[optind], ar_entry->name) == 0) {
- ar_headers_t *tmp;
- tmp = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
- *tmp = *extract_list;
- *extract_list = *ar_entry;
- extract_list->next = tmp;
- break;
- }
- ar_entry=ar_entry->next;
- }
+ while (optind < argc) {
+ archive_handle->filter = filter_accept_list;
+ archive_handle->accept = llist_add_to(archive_handle->accept, argv[optind++]);
}
- /* if individual files not found extract all files */
- if (extract_list->next==NULL) {
- extract_list = &head;
- }
-
- /* find files to extract or display */
- while (extract_list->next != NULL) {
- if (funct & extract_to_file) {
- dstFd = open(extract_list->name, O_WRONLY | O_CREAT, extract_list->mode);
- }
- else if (funct & extract_to_stdout) {
- dstFd = fileno(stdout);
- }
- if ((funct & extract_to_file) || (funct & extract_to_stdout)) {
- lseek(srcFd, extract_list->offset, SEEK_SET);
- copy_file_chunk(srcFd, dstFd, (size_t) extract_list->size);
- }
- if (funct & verbose) {
- printf("%s %d/%d %8d %s ", mode_string(extract_list->mode),
- extract_list->uid, extract_list->gid,
- extract_list->size, time_string(extract_list->mtime));
- }
- if ((funct & display) || (funct & verbose)){
- printf("%s\n", extract_list->name);
- }
- extract_list=extract_list->next;
+ archive_xread_all(archive_handle, magic, 7);
+ if (strncmp(magic, "!<arch>", 7) != 0) {
+ bb_error_msg_and_die("Invalid ar magic");
}
+ archive_handle->offset += 7;
+
+ while (get_header_ar(archive_handle) == EXIT_SUCCESS);
+
return EXIT_SUCCESS;
}