/* 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.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
- * 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.
+ * Archive creation support:
+ * Copyright (C) 2010 Nokia Corporation. All rights reserved.
+ * Written by Alexander Shishkin.
*
- * 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
- *
- * Last modified 10 June 2000
+ * 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
*/
+//config:config AR
+//config: bool "ar (9.5 kb)"
+//config: default n # needs to be improved to be able to replace binutils ar
+//config: help
+//config: ar is an archival utility program used to create, modify, and
+//config: extract contents from archives. In practice, it is used exclusively
+//config: for object module archives used by compilers.
+//config:
+//config: Unless you have a specific application which requires ar, you should
+//config: probably say N here: most compilers come with their own ar utility.
+//config:
+//config:config FEATURE_AR_LONG_FILENAMES
+//config: bool "Support long filenames (not needed for debs)"
+//config: default y
+//config: depends on AR
+//config: help
+//config: By default the ar format can only store the first 15 characters
+//config: of the filename, this option removes that limitation.
+//config: It supports the GNU ar long filename method which moves multiple long
+//config: filenames into a the data section of a new ar entry.
+//config:
+//config:config FEATURE_AR_CREATE
+//config: bool "Support archive creation"
+//config: default y
+//config: depends on AR
+//config: help
+//config: This enables archive creation (-c and -r) with busybox ar.
+//applet:IF_AR(APPLET(ar, BB_DIR_USR_BIN, BB_SUID_DROP))
-#include <stdio.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <ctype.h>
-#include <time.h>
-#include <utime.h>
-#include <sys/types.h>
-#include "internal.h"
-
-#define AR_BLOCK_SIZE 60
-#define AR_PRESERVE_DATE 1 /* preserve original dates */
-#define AR_VERBOSE 2 /* be verbose */
-#define AR_DISPLAY 4 /* display contents */
-#define AR_EXT_TO_FILE 8 /* extract contents of archive */
-#define AR_EXT_TO_STDOUT 16 /* extract to stdout */
-
-#define BB_DECLARE_EXTERN
-#define bb_need_io_error
-#include "messages.c"
-
-struct ArHeader { /* Byte Offset */
- char ar_name[16]; /* 0-15 */
- char ar_date[12]; /* 16-27 */
- char ar_uid[6], ar_gid[6]; /* 28-39 */
- char ar_mode[8]; /* 40-47 */
- char ar_size[10]; /* 48-57 */
- char ar_fmag[2]; /* 58-59 */
-};
-typedef struct ArHeader ArHeader;
-
-struct ArInfo {
- char name[17]; /* File name */
- time_t date; /* long int, No of seconds since epoch */
- uid_t uid; /* unsigned int, Numeric UID */
- gid_t gid; /* unsigned int, Numeric GID */
- mode_t mode; /* unsigned int, Unix mode */
- size_t size; /* int, Size of the file */
-};
-typedef struct ArInfo ArInfo;
-
-static const char ar_usage[] = "ar [optxvV] archive [filenames] \n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
- "\nExtract or list files from an ar archive.\n\n"
- "Options:\n"
- "\to\t\tpreserve original dates\n"
- "\tp\t\textract to stdout\n"
- "\tt\t\tlist\n"
- "\tx\t\textract\n"
- "\tv\t\tverbosely list files processed\n"
-#endif
- ;
+//kbuild:lib-$(CONFIG_AR) += ar.o
-/*
- * Display details of a file, verbosly if funct=2
- */
-static void displayEntry(struct ArInfo *entry, int funct)
-{
- /* TODO convert mode to string */
- if ((funct & AR_VERBOSE) == AR_VERBOSE)
- printf("%i %i/%i %8i %s ", entry->mode, entry->uid, entry->gid,
- entry->size, timeString(entry->date));
- printf("%s\n", entry->name);
-}
+//usage:#define ar_trivial_usage
+//usage: "[-o] [-v] [-p] [-t] [-x] ARCHIVE FILES"
+//usage:#define ar_full_usage "\n\n"
+//usage: "Extract or list FILES from an ar archive\n"
+//usage: "\n -o Preserve original dates"
+//usage: "\n -p Extract to stdout"
+//usage: "\n -t List"
+//usage: "\n -x Extract"
+//usage: "\n -v Verbose"
-/* this is from tar.c remove later*/
-static long getOctal(const char *cp, int size)
+#include "libbb.h"
+#include "bb_archive.h"
+#include "ar.h"
+
+#if ENABLE_FEATURE_AR_CREATE
+/* filter out entries with same names as specified on the command line */
+static char FAST_FUNC filter_replaceable(archive_handle_t *handle)
{
- long val = 0;
-
- for(;(size > 0) && (*cp == ' '); cp++, size--);
- if ((size == 0) || !isOctal(*cp))
- return -1;
- for(; (size > 0) && isOctal(*cp); size--) {
- val = val * 8 + *cp++ - '0';
- }
- for (;(size > 0) && (*cp == ' '); cp++, size--);
- if ((size > 0) && *cp)
- return -1;
- return val;
+ if (find_list_entry(handle->accept, handle->file_header->name))
+ return EXIT_FAILURE;
+
+ return EXIT_SUCCESS;
}
-/*
- * Converts from the char based struct to a new struct with stricter types
- */
-static int processArHeader(struct ArHeader *rawHeader, struct ArInfo *header)
+static void output_ar_header(archive_handle_t *handle)
{
- int count2;
- int count;
-
- /* check end of header marker is valid */
- if ((rawHeader->ar_fmag[0]!='`') || (rawHeader->ar_fmag[1]!='\n'))
- return(FALSE);
-
- /* convert filename */
- for (count = 0; count < 16; count++) {
- /* allow spaces in filename except at the end */
- if (rawHeader->ar_name[count] == ' ') {
- for (count2 = count; count2 < 16; count2++)
- if (!isspace(rawHeader->ar_name[count2]))
- break;
- if (count2 >= 16)
- break;
- }
- /* GNU ar uses '/' as an end of filename marker */
- if (rawHeader->ar_name[count] == '/')
- break;
- header->name[count] = rawHeader->ar_name[count];
+ /* GNU ar 2.19.51.0.14 creates malformed archives
+ * if input files are >10G. It also truncates files >4GB
+ * (uses "size mod 4G"). We abort in this case:
+ * We could add support for up to 10G files, but this is unlikely to be useful.
+ * Note that unpacking side limits all fields to "unsigned int" data type,
+ * and treats "all ones" as an error indicator. Thus max we allow here is UINT_MAX-1.
+ */
+ enum {
+ /* for 2nd field: mtime */
+ MAX11CHARS = UINT_MAX > 0xffffffff ? (unsigned)99999999999 : UINT_MAX-1,
+ /* for last field: filesize */
+ MAX10CHARS = UINT_MAX > 0xffffffff ? (unsigned)9999999999 : UINT_MAX-1,
+ };
+
+ struct file_header_t *fh = handle->file_header;
+
+ if (handle->offset & 1) {
+ xwrite(handle->src_fd, "\n", 1);
+ handle->offset++;
}
- header->name[count] = '\0';
- header->date = atoi(rawHeader->ar_date);
- header->uid = atoi(rawHeader->ar_uid);
- header->gid = atoi(rawHeader->ar_gid);
- header->mode = getOctal(rawHeader->ar_mode, sizeof(rawHeader->ar_mode));
- header->size = atoi(rawHeader->ar_size);
- return (TRUE);
+
+ /* Careful! The widths should be exact. Fields must be separated */
+ if (sizeof(off_t) > 4 && fh->size > (off_t)MAX10CHARS) {
+ bb_error_msg_and_die("'%s' is bigger than ar can handle", fh->name);
+ }
+ fdprintf(handle->src_fd, "%-16.16s%-12lu%-6u%-6u%-8o%-10"OFF_FMT"u`\n",
+ fh->name,
+ (sizeof(time_t) > 4 && fh->mtime > MAX11CHARS) ? (long)0 : (long)fh->mtime,
+ fh->uid > 99999 ? 0 : (int)fh->uid,
+ fh->gid > 99999 ? 0 : (int)fh->gid,
+ (int)fh->mode & 07777777,
+ fh->size
+ );
+
+ handle->offset += AR_HEADER_LEN;
}
/*
- * Copy size bytes from current position if srcFd to current position in dstFd
- * taken from tarExtractRegularFile in tar.c, remove later
+ * when replacing files in an existing archive, copy from the
+ * original archive those files that are to be left intact
*/
-static int copySubFile(int srcFd, int dstFd, int copySize)
+static void FAST_FUNC copy_data(archive_handle_t *handle)
{
- int readSize, writeSize, doneSize;
- char buffer[BUFSIZ];
-
- while (copySize > 0) {
- if (copySize > BUFSIZ)
- readSize = BUFSIZ;
- else
- readSize = copySize;
- writeSize = fullRead(srcFd, buffer, readSize);
- if (writeSize <= 0) {
- errorMsg(io_error, "copySubFile :", strerror(errno));
- return (FALSE);
- }
- doneSize = fullWrite(dstFd, buffer, writeSize);
- if (doneSize <= 0) {
- errorMsg(io_error, "copySubFile :", strerror(errno));
- return (FALSE);
- }
- copySize -= doneSize;
- }
- return (TRUE);
+ archive_handle_t *out_handle = handle->ar__out;
+ struct file_header_t *fh = handle->file_header;
+
+ out_handle->file_header = fh;
+ output_ar_header(out_handle);
+
+ bb_copyfd_exact_size(handle->src_fd, out_handle->src_fd, fh->size);
+ out_handle->offset += fh->size;
}
-/*
- * Extract the file described in ArInfo to the specified path
- * set the new files uid, gid and mode
- */
-static int extractToFile(struct ArInfo *file, int funct, int srcFd, const char *path)
+static int write_ar_header(archive_handle_t *handle)
{
- int dstFd, temp;
- struct stat tmpStat;
- char *pathname = NULL;
- struct utimbuf newtime;
-
- if ((temp = isDirectory(path, TRUE, &tmpStat)) != TRUE) {
- if (!createPath(path, 0777)) {
- fatalError("Cannot extract to specified path");
- return (FALSE);
- }
- }
- temp = (strlen(path) + 16);
- pathname = (char *) xmalloc(temp);
- pathname = strcpy(pathname, path);
- pathname = strcat(pathname, file->name);
- dstFd = device_open(pathname, O_WRONLY | O_CREAT);
- temp = copySubFile(srcFd, dstFd, file->size);
- fchown(dstFd, file->uid, file->gid);
- fchmod(dstFd, file->mode);
- close(dstFd);
- if ((funct&AR_PRESERVE_DATE)==AR_PRESERVE_DATE)
- newtime.modtime=file->date;
- else
- newtime.modtime=time(0);
- newtime.actime=time(0);
- temp = utime(pathname, &newtime);
- return (TRUE);
+ char *fn;
+ char fn_h[17]; /* 15 + "/" + NUL */
+ struct stat st;
+ int fd;
+
+ fn = llist_pop(&handle->accept);
+ if (!fn)
+ return -1;
+
+ xstat(fn, &st);
+
+ handle->file_header->mtime = st.st_mtime;
+ handle->file_header->uid = st.st_uid;
+ handle->file_header->gid = st.st_gid;
+ handle->file_header->mode = st.st_mode;
+ handle->file_header->size = st.st_size;
+ handle->file_header->name = fn_h;
+//TODO: if ENABLE_FEATURE_AR_LONG_FILENAMES...
+ sprintf(fn_h, "%.15s/", bb_basename(fn));
+
+ output_ar_header(handle);
+
+ fd = xopen(fn, O_RDONLY);
+ bb_copyfd_exact_size(fd, handle->src_fd, st.st_size);
+ close(fd);
+ handle->offset += st.st_size;
+
+ return 0;
}
-/*
- * Return a file descriptor for the specified file and do error checks
- */
-static int getArFd(char *filename)
+static int write_ar_archive(archive_handle_t *handle)
{
- int arFd;
- char arVersion[8];
+ struct stat st;
+ archive_handle_t *out_handle;
- arFd = open(filename, O_RDONLY);
- if (arFd < 0) {
- errorMsg("Error opening '%s': %s\n", filename, strerror(errno));
- return (FALSE);
+ xfstat(handle->src_fd, &st, handle->ar__name);
+
+ /* if archive exists, create a new handle for output.
+ * we create it in place of the old one.
+ */
+ if (st.st_size != 0) {
+ out_handle = init_handle();
+ xunlink(handle->ar__name);
+ out_handle->src_fd = xopen(handle->ar__name, O_WRONLY | O_CREAT | O_TRUNC);
+ out_handle->accept = handle->accept;
+ } else {
+ out_handle = handle;
+ }
+
+ handle->ar__out = out_handle;
+
+ xwrite(out_handle->src_fd, AR_MAGIC "\n", AR_MAGIC_LEN + 1);
+ out_handle->offset += AR_MAGIC_LEN + 1;
+
+ /* skip to the end of the archive if we have to append stuff */
+ if (st.st_size != 0) {
+ handle->filter = filter_replaceable;
+ handle->action_data = copy_data;
+ unpack_ar_archive(handle);
+ }
+
+ while (write_ar_header(out_handle) == 0)
+ continue;
+
+ /* optional, since we exit right after we return */
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ close(handle->src_fd);
+ if (out_handle->src_fd != handle->src_fd)
+ close(out_handle->src_fd);
}
- if (fullRead(arFd, arVersion, 8) <= 0) {
- errorMsg( "ar: Unexpected EOF in archive\n");
- return (FALSE);
- }
- if (strncmp(arVersion,"!<arch>",7) != 0) {
- errorMsg("ar header fails check ");
- return(FALSE);
- }
- return arFd;
+
+ return EXIT_SUCCESS;
}
+#endif /* FEATURE_AR_CREATE */
-/*
- * Step through the ar file and process it one entry at a time
- * fileList[0] is the name of the ar archive
- * fileList[1] and up are filenames to extract from the archive
- * funct contains flags to specify the actions to be performed
- */
-static int readArFile(char *fileList[16], int fileListSize, int funct)
+static void FAST_FUNC header_verbose_list_ar(const file_header_t *file_header)
{
- int arFd, status, extFileFlag, i, lastOffset=0;
- ArHeader rawArHeader;
- ArInfo arEntry;
-
- /* open the ar archive */
- arFd=getArFd(fileList[0]);
-
- /* read the first header, then loop until ono more headers */
- while ((status = fullRead(arFd, (char *) &rawArHeader, AR_BLOCK_SIZE))
- == AR_BLOCK_SIZE) {
-
- /* check the header is valid, if not try reading the header
- agian with an offset of 1, needed as some ar archive end
- with a '\n' which isnt counted in specified file size */
- if ((status=processArHeader(&rawArHeader, &arEntry))==FALSE ) {
- if ((i=lseek(arFd, 0, SEEK_CUR))==(lastOffset+60))
- lseek(arFd, lastOffset+1, SEEK_SET);
- else
- return(FALSE);
- }
- else {
- extFileFlag=0;
-
- if (funct&AR_DISPLAY)
- displayEntry(&arEntry, funct);
-
- /* check file was specified to be extracted only if
- some file were specified */
- if ((funct&AR_EXT_TO_FILE) || (funct&AR_EXT_TO_STDOUT)){
- if (fileListSize==1)
- extFileFlag=1;
- else {
- for( i=1; i<=fileListSize; i++)
- if ((status=(strcmp(fileList[i],arEntry.name)))==0)
- extFileFlag=1;
- }
- }
- if (extFileFlag==1) {
- if (funct&AR_EXT_TO_FILE)
- extractToFile(&arEntry, funct, arFd, "./");
- else
- copySubFile(arFd,fileno(stdout),arEntry.size);
- }
- else
- lseek(arFd, arEntry.size, SEEK_CUR);
- lastOffset=lseek(arFd, 0, SEEK_CUR);
- } /* if processArHeader */
- } /* while */
- 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 %u/%u%7"OFF_FMT"u %s %s\n", &mode[1],
+ (int)file_header->uid, (int)file_header->gid,
+ file_header->size,
+ &mtime[4], file_header->name
+ );
}
-extern int ar_main(int argc, char **argv)
+#define AR_OPT_VERBOSE (1 << 0)
+#define AR_OPT_PRESERVE_DATE (1 << 1)
+/* "ar r" implies create, but warns about it. c suppresses warning.
+ * bbox accepts but ignores it: */
+#define AR_OPT_CREATE (1 << 2)
+
+#define AR_CMD_PRINT (1 << 3)
+#define FIRST_CMD AR_CMD_PRINT
+#define AR_CMD_LIST (1 << 4)
+#define AR_CMD_EXTRACT (1 << 5)
+#define AR_CMD_INSERT (1 << 6)
+
+int ar_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int ar_main(int argc UNUSED_PARAM, char **argv)
{
- int funct = 0, ret=0, i=0;
- char *fileList[16], c, *opt_ptr;
-
- if (argc < 2)
- usage(ar_usage);
-
- opt_ptr = argv[1];
- if (*opt_ptr == '-')
- ++opt_ptr;
- while ((c = *opt_ptr++) != '\0') {
- switch (c) {
- case 'o':
- funct = funct | AR_PRESERVE_DATE;
- break;
- case 'v':
- funct = funct | AR_VERBOSE;
- break;
- case 't':
- funct = funct | AR_DISPLAY;
- break;
- case 'x':
- funct = funct | AR_EXT_TO_FILE;
- break;
- case 'p':
- funct = funct | AR_EXT_TO_STDOUT;
- break;
- default:
- usage(ar_usage);
- }
+ archive_handle_t *archive_handle;
+ unsigned opt, t;
+
+ archive_handle = init_handle();
+
+ /* prepend '-' to the first argument if required */
+ if (argv[1] && argv[1][0] != '-' && argv[1][0] != '\0')
+ argv[1] = xasprintf("-%s", argv[1]);
+ opt = getopt32(argv, "^"
+ "voc""ptx"IF_FEATURE_AR_CREATE("r")
+ "\0"
+ /* -1: at least one arg is reqd */
+ /* one of p,t,x[,r] is required */
+ "-1:p:t:x"IF_FEATURE_AR_CREATE(":r")
+ );
+ argv += optind;
+
+ t = opt / FIRST_CMD;
+ if (t & (t-1)) /* more than one of p,t,x[,r] are specified */
+ bb_show_usage();
+
+ if (opt & AR_CMD_PRINT) {
+ archive_handle->action_data = data_extract_to_stdout;
+ }
+ if (opt & AR_CMD_LIST) {
+ archive_handle->action_header = header_list;
+ }
+ if (opt & AR_CMD_EXTRACT) {
+ archive_handle->action_data = data_extract_all;
+ }
+ if (opt & AR_OPT_PRESERVE_DATE) {
+ archive_handle->ah_flags |= ARCHIVE_RESTORE_DATE;
}
+ if (opt & AR_OPT_VERBOSE) {
+ archive_handle->action_header = header_verbose_list_ar;
+ }
+#if ENABLE_FEATURE_AR_CREATE
+ archive_handle->ar__name = *argv;
+#endif
+ archive_handle->src_fd = xopen(*argv++,
+ (opt & AR_CMD_INSERT)
+ ? O_RDWR | O_CREAT
+ : O_RDONLY
+ );
+
+ if (*argv)
+ archive_handle->filter = filter_accept_list;
+ while (*argv) {
+ llist_add_to_end(&archive_handle->accept, *argv++);
+ }
+
+#if ENABLE_FEATURE_AR_CREATE
+ if (opt & AR_CMD_INSERT)
+ return write_ar_archive(archive_handle);
+#endif
+
+ unpack_ar_archive(archive_handle);
- for(i=0; i<(argc-2); i++)
- fileList[i]=argv[i+2];
-
- if (funct > 3)
- ret = readArFile(fileList, (argc-2), funct);
-
- return (ret);
+ return EXIT_SUCCESS;
}
projects / oweals / busybox.git / blobdiff