/* 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@netconnect.com.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
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * Written by Glenn McGrath <bug1@iinet.net.au> 1 June 2000
*
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
+ * Based in part on BusyBox tar, Debian dpkg-deb and GNU ar.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*
- * Last modified 20 September 2000
- */
-#include <stdio.h>
-#include <string.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <ctype.h>
-#include <time.h>
-#include <utime.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <malloc.h>
-#include "internal.h"
-
-#define BLOCK_SIZE 60
-#define PRESERVE_DATE 1 /* preserve original dates */
-#define VERBOSE 2 /* be verbose */
-#define DISPLAY 4 /* display contents */
-#define EXT_TO_FILE 8 /* extract contents of archive */
-#define EXT_TO_STDOUT 16 /* extract to stdout */
-#define RECURSIVE 32
-
-#define MAX_NAME_LENGTH 100
-
-//#define BB_DECLARE_EXTERN
-//#define bb_need_io_error
-//#include "messages.c"
-
-//#define BB_AR_EXPERIMENTAL_UNTAR
-
-#if defined BB_AR_EXPERIMENTAL_UNTAR
-typedef struct rawTarHeader {
- char name[100]; /* 0-99 */
- char mode[8]; /* 100-107 */
- char uid[8]; /* 108-115 */
- char gid[8]; /* 116-123 */
- char size[12]; /* 124-135 */
- char mtime[12]; /* 136-147 */
- char chksum[8]; /* 148-155 */
- char typeflag; /* 156-156 */
- char linkname[100]; /* 157-256 */
- char magic[6]; /* 257-262 */
- char version[2]; /* 263-264 */
- char uname[32]; /* 265-296 */
- char gname[32]; /* 297-328 */
- char devmajor[8]; /* 329-336 */
- char devminor[8]; /* 337-344 */
- char prefix[155]; /* 345-499 */
- char padding[12]; /* 500-512 */
-} rawTarHeader_t;
-#endif
-
-typedef struct rawArHeader { /* Byte Offset */
- char name[16]; /* 0-15 */
- char date[12]; /* 16-27 */
- char uid[6], gid[6]; /* 28-39 */
- char mode[8]; /* 40-47 */
- char size[10]; /* 48-57 */
- char fmag[2]; /* 58-59 */
-} rawArHeader_t;
-
-typedef struct headerL {
- char name[MAX_NAME_LENGTH];
- size_t size;
- uid_t uid;
- gid_t gid;
- mode_t mode;
- time_t mtime;
- off_t offset;
- struct headerL *next;
-} headerL_t;
-
-#if defined BB_AR_EXPERIMENTAL_UNTAR
-/*
- * identify Tar header (magic field) and reset srcFd to entry position
+ * 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
*/
-static int checkTarMagic(int srcFd)
-{
- off_t headerStart;
- char magic[6];
-
- headerStart = lseek(srcFd, 0, SEEK_CUR);
- lseek(srcFd, (off_t) 257, SEEK_CUR);
- fullRead(srcFd, magic, 6);
- lseek(srcFd, headerStart, SEEK_SET);
- if (strncmp(magic, "ustar", 5)!=0)
- return(FALSE);
- return(TRUE);
-}
+#include "busybox.h"
+#include "unarchive.h"
-static int readTarHeader(int srcFd, headerL_t *current)
+static void header_verbose_list_ar(const file_header_t *file_header)
{
- rawTarHeader_t rawTarHeader;
- unsigned char *temp = (unsigned char *) &rawTarHeader;
- long sum = 0;
- int i;
- off_t initialOffset;
-
- initialOffset = lseek(srcFd, 0, SEEK_CUR);
- if (fullRead(srcFd, (char *) &rawTarHeader, 512) != 512) {
- lseek(srcFd, initialOffset, SEEK_SET);
- return(FALSE);
- }
- for (i = 0; i < 148 ; i++)
- sum += temp[i];
- sum += ' ' * 8;
- for (i = 156; i < 512 ; i++)
- sum += temp[i];
- if (sum!= strtol(rawTarHeader.chksum, NULL, 8))
- return(FALSE);
- sscanf(rawTarHeader.name, "%s", current->name);
- current->size = strtol(rawTarHeader.size, NULL, 8);
- current->uid = strtol(rawTarHeader.uid, NULL, 8);
- current->gid = strtol(rawTarHeader.gid, NULL, 8);
- current->mode = strtol(rawTarHeader.mode, NULL, 8);
- current->mtime = strtol(rawTarHeader.mtime, NULL, 8);
- current->offset = lseek(srcFd, 0 , SEEK_CUR);
-
- current->next = (headerL_t *) xmalloc(sizeof(headerL_t));
- current = current->next;
- return(TRUE);
+ const char *mode = bb_mode_string(file_header->mode);
+ char *mtime;
+
+ 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);
}
-#endif
-/*
- * identify Ar header (magic) and reset srcFd to entry position
- */
-static int checkArMagic(int srcFd)
-{
- off_t headerStart;
- char arMagic[8];
-
- headerStart = lseek(srcFd, 0, SEEK_CUR);
- if (fullRead(srcFd, arMagic, 8) != 8) {
- errorMsg("fatal error\n");
- return (FALSE);
- }
- lseek(srcFd, headerStart, SEEK_SET);
-
- if (strncmp(arMagic,"!<arch>",7) != 0)
- return(FALSE);
- return(TRUE);
-}
+#define AR_CTX_PRINT 0x01
+#define AR_CTX_LIST 0x02
+#define AR_CTX_EXTRACT 0x04
+#define AR_OPT_PRESERVE_DATE 0x08
+#define AR_OPT_VERBOSE 0x10
+#define AR_OPT_CREATE 0x20
+#define AR_OPT_INSERT 0x40
-/*
- * get, check and correct the converted header
- */
-static int readArEntry(int srcFd, headerL_t *entry)
+int ar_main(int argc, char **argv);
+int ar_main(int argc, char **argv)
{
- size_t nameLength;
- rawArHeader_t rawArHeader;
- off_t initialOffset;
-
- initialOffset = lseek(srcFd, 0, SEEK_CUR);
- if (fullRead(srcFd, (char *) &rawArHeader, 60) != 60) {
- lseek(srcFd, initialOffset, SEEK_SET);
- return(FALSE);
- }
- if ((rawArHeader.fmag[0]!='`') || (rawArHeader.fmag[1]!='\n')) {
- lseek(srcFd, initialOffset, SEEK_SET);
- return(FALSE);
- }
+ archive_handle_t *archive_handle;
+ unsigned opt;
+ static const char msg_unsupported_err[] =
+ "Archive %s not supported. Install binutils 'ar'.";
+ char magic[8];
- strncpy(entry->name, rawArHeader.name, 16);
- nameLength=strcspn(entry->name, " \\");
- entry->name[nameLength]='\0';
- parse_mode(rawArHeader.mode, &entry->mode);
- entry->mtime = atoi(rawArHeader.date);
- entry->uid = atoi(rawArHeader.uid);
- entry->gid = atoi(rawArHeader.gid);
- entry->size = (size_t) atoi(rawArHeader.size);
- entry->offset = initialOffset + (off_t) 60;
+ archive_handle = init_handle();
- nameLength = strcspn(entry->name, "/");
-
- /* handle GNU style short filenames, strip trailing '/' */
- if (nameLength > 0)
- entry->name[nameLength]='\0';
-
- /* handle GNU style long filenames */
- if (nameLength == 0) {
- /* escape from recursive call */
- if (entry->name[1]=='0')
- return(TRUE);
+ /* Prepend '-' to the first argument if required */
+ opt_complementary = "--:p:t:x:-1:?:p--tx:t--px:x--pt";
+ opt = getopt32(argc, argv, "ptxovcr");
- /* the data section contains the real filename */
- if (entry->name[1]=='/') {
- char tempName[MAX_NAME_LENGTH];
-
- if (entry->size > MAX_NAME_LENGTH)
- entry->size = MAX_NAME_LENGTH;
- fullRead(srcFd, tempName, entry->size);
- tempName[entry->size-3]='\0';
-
- /* read the second header for this entry */
- /* be carefull, this is recursive */
- if (readArEntry(srcFd, entry)==FALSE)
- return(FALSE);
-
- if ((entry->name[0]='/') && (entry->name[1]='0'))
- strcpy(entry->name, tempName);
- else {
- errorMsg("Invalid long filename\n");
- return(FALSE);
- }
- }
+ if (opt & AR_CTX_PRINT) {
+ archive_handle->action_data = data_extract_to_stdout;
}
- return(TRUE);
-}
-
-/*
- * return the headerL_t struct for the specified filename
- */
-static headerL_t *getHeaders(int srcFd, headerL_t *head, int funct)
-{
-#if defined BB_AR_EXPERIMENTAL_UNTAR
- int tar=FALSE;
-#endif
- int ar=FALSE;
- headerL_t *list;
- off_t initialOffset;
-
- list = (headerL_t *) xmalloc(sizeof(headerL_t));
- initialOffset=lseek(srcFd, 0, SEEK_CUR);
- if (checkArMagic(srcFd)==TRUE)
- ar=TRUE;
-
-#if defined BB_AR_EXPERIMENTAL_UNTAR
- if (checkTarMagic(srcFd)==TRUE)
- tar=TRUE;
-
- if (tar==TRUE) {
- while(readTarHeader(srcFd, list)==TRUE) {
- off_t tarOffset;
- list->next = (headerL_t *) xmalloc(sizeof(headerL_t));
- *list->next = *head;
- *head = *list;
-
- /* recursive check for sub-archives */
- if ((funct & RECURSIVE) == RECURSIVE)
- head = getHeaders(srcFd, head, funct);
- tarOffset = (off_t) head->size/512;
- if ( head->size % 512 > 0)
- tarOffset++;
- tarOffset=tarOffset*512;
- lseek(srcFd, head->offset + tarOffset, SEEK_SET);
- }
- }
-#endif
-
- if (ar==TRUE) {
- lseek(srcFd, 8, SEEK_CUR);
- while(1) {
- if (readArEntry(srcFd, list) == FALSE) {
- lseek(srcFd, ++initialOffset, SEEK_CUR);
- if (readArEntry(srcFd, list) == FALSE)
- return(head);
- }
- list->next = (headerL_t *) xmalloc(sizeof(headerL_t));
- *list->next = *head;
- *head = *list;
- /* recursive check for sub-archives */
- if (funct & RECURSIVE)
- head = getHeaders(srcFd, head, funct);
- lseek(srcFd, head->offset + head->size, SEEK_SET);
- }
+ if (opt & AR_CTX_LIST) {
+ archive_handle->action_header = header_list;
}
- return(head);
-}
-
-/*
- * find an entry in the linked list matching the filename
- */
-static headerL_t *findEntry(headerL_t *head, const char *filename)
-{
- while(head->next != NULL) {
- if (strcmp(filename, head->name)==0)
- return(head);
- head=head->next;
+ if (opt & AR_CTX_EXTRACT) {
+ archive_handle->action_data = data_extract_all;
}
- return(NULL);
-}
-
-extern int ar_main(int argc, char **argv)
-{
- int funct = 0, opt=0;
- int srcFd=0, dstFd=0;
- headerL_t *header, *entry, *extractList;
-
- while ((opt = getopt(argc, argv, "ovtpxR")) != -1) {
- switch (opt) {
- case 'o':
- funct |= PRESERVE_DATE;
- break;
- case 'v':
- funct |= VERBOSE;
- break;
- case 't':
- funct |= DISPLAY;
- break;
- case 'x':
- funct |= EXT_TO_FILE;
- break;
- case 'p':
- funct |= EXT_TO_STDOUT;
- break;
- case 'R':
- funct |= RECURSIVE;
- break;
- default:
- usage(ar_usage);
- }
+ 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;
+ }
+ if (opt & AR_OPT_CREATE) {
+ bb_error_msg_and_die(msg_unsupported_err, "creation");
+ }
+ if (opt & AR_OPT_INSERT) {
+ bb_error_msg_and_die(msg_unsupported_err, "insertion");
}
-
- /* check the src filename was specified */
- if (optind == argc)
- usage(ar_usage);
-
- if ( (srcFd = open(argv[optind], O_RDONLY)) < 0)
- fatalError("Cannot read %s\n", argv[optind]);
- optind++;
- entry = (headerL_t *) xmalloc(sizeof(headerL_t));
- header = (headerL_t *) xmalloc(sizeof(headerL_t));
- extractList = (headerL_t *) xmalloc(sizeof(headerL_t));
+ archive_handle->src_fd = xopen(argv[optind++], O_RDONLY);
- header = getHeaders(srcFd, header, funct);
- /* find files to extract or display */
- if (optind<argc) {
- /* only handle specified files */
- while(optind < argc) {
- if ( (entry = findEntry(header, argv[optind])) != NULL) {
- entry->next = (headerL_t *) xmalloc(sizeof(headerL_t));
- *entry->next = *extractList;
- *extractList = *entry;
- }
- optind++;
- }
+ while (optind < argc) {
+ archive_handle->filter = filter_accept_list;
+ llist_add_to(&(archive_handle->accept), argv[optind++]);
}
- else
- extractList = header;
-
- while(extractList->next != NULL) {
- if (funct & EXT_TO_FILE) {
- if (isDirectory(extractList->name, TRUE, NULL)==FALSE)
- createPath(extractList->name, 0666);
- dstFd = open(extractList->name, O_WRONLY | O_CREAT, extractList->mode);
- lseek(srcFd, extractList->offset, SEEK_SET);
- copySubFile(srcFd, dstFd, (size_t) extractList->size);
- }
- if (funct & EXT_TO_STDOUT) {
- lseek(srcFd, extractList->offset, SEEK_SET);
- copySubFile(srcFd, fileno(stdout), (size_t) extractList->size);
- }
- if ( (funct & DISPLAY) || (funct & VERBOSE)) {
- if (funct & VERBOSE)
- printf("%s %d/%d %8d %s ", modeString(extractList->mode),
- extractList->uid, extractList->gid,
- extractList->size, timeString(extractList->mtime));
- printf("%s\n", extractList->name);
- }
- extractList=extractList->next;
+
+ xread(archive_handle->src_fd, magic, 7);
+ if (strncmp(magic, "!<arch>", 7) != 0) {
+ bb_error_msg_and_die("invalid ar magic");
}
- return (TRUE);
+ archive_handle->offset += 7;
+
+ while (get_header_ar(archive_handle) == EXIT_SUCCESS) /* repeat */;
+
+ return EXIT_SUCCESS;
}
projects / oweals / busybox.git / blobdiff