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-rw-r--r--release/src/router/busybox/tar.c1141
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diff --git a/release/src/router/busybox/tar.c b/release/src/router/busybox/tar.c
deleted file mode 100644
index 50e3b3ef..00000000
--- a/release/src/router/busybox/tar.c
+++ /dev/null
@@ -1,1141 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * Mini tar implementation for busybox
- *
- * Note, that as of BusyBox-0.43, tar has been completely rewritten from the
- * ground up. It still has remnents of the old code lying about, but it is
- * very different now (i.e., cleaner, less global variables, etc.)
- *
- * Copyright (C) 1999,2000,2001 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
- *
- * Based in part in the tar implementation in sash
- * Copyright (c) 1999 by David I. Bell
- * Permission is granted to use, distribute, or modify this source,
- * provided that this copyright notice remains intact.
- * Permission to distribute sash derived code under the GPL has been granted.
- *
- * Based in part on the tar implementation from busybox-0.28
- * Copyright (C) 1995 Bruce Perens
- * This is free software under the GNU General Public License.
- *
- * 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.
- *
- * 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.
- *
- * 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
- *
- */
-
-
-#include <stdio.h>
-#include <dirent.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <time.h>
-#include <utime.h>
-#include <sys/types.h>
-#include <sys/sysmacros.h>
-#include <getopt.h>
-#include <fnmatch.h>
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include "busybox.h"
-
-/* Tar file constants */
-#ifndef MAJOR
-#define MAJOR(dev) (((dev)>>8)&0xff)
-#define MINOR(dev) ((dev)&0xff)
-#endif
-
-enum { NAME_SIZE = 100 }; /* because gcc won't let me use 'static const int' */
-
-/* POSIX tar Header Block, from POSIX 1003.1-1990 */
-struct TarHeader
-{
- /* byte offset */
- char name[NAME_SIZE]; /* 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[NAME_SIZE]; /* 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 (pad to exactly the TAR_BLOCK_SIZE) */
-};
-typedef struct TarHeader TarHeader;
-
-
-/* A few useful constants */
-#define TAR_MAGIC "ustar" /* ustar and a null */
-#define TAR_VERSION " " /* Be compatable with GNU tar format */
-static const int TAR_MAGIC_LEN = 6;
-static const int TAR_VERSION_LEN = 2;
-static const int TAR_BLOCK_SIZE = 512;
-
-/* A nice enum with all the possible tar file content types */
-enum TarFileType
-{
- REGTYPE = '0', /* regular file */
- REGTYPE0 = '\0', /* regular file (ancient bug compat)*/
- LNKTYPE = '1', /* hard link */
- SYMTYPE = '2', /* symbolic link */
- CHRTYPE = '3', /* character special */
- BLKTYPE = '4', /* block special */
- DIRTYPE = '5', /* directory */
- FIFOTYPE = '6', /* FIFO special */
- CONTTYPE = '7', /* reserved */
- GNULONGLINK = 'K', /* GNU long (>100 chars) link name */
- GNULONGNAME = 'L', /* GNU long (>100 chars) file name */
-};
-typedef enum TarFileType TarFileType;
-
-/* This struct ignores magic, non-numeric user name,
- * non-numeric group name, and the checksum, since
- * these are all ignored by BusyBox tar. */
-struct TarInfo
-{
- int tarFd; /* An open file descriptor for reading from the tarball */
- char * name; /* File name */
- mode_t mode; /* Unix mode, including device bits. */
- uid_t uid; /* Numeric UID */
- gid_t gid; /* Numeric GID */
- size_t size; /* Size of file */
- time_t mtime; /* Last-modified time */
- enum TarFileType type; /* Regular, directory, link, etc. */
- char * linkname; /* Name for symbolic and hard links */
- long devmajor; /* Major number for special device */
- long devminor; /* Minor number for special device */
-};
-typedef struct TarInfo TarInfo;
-
-/* Local procedures to restore files from a tar file. */
-static int readTarFile(int tarFd, int extractFlag, int listFlag,
- int tostdoutFlag, int verboseFlag, char** extractList,
- char** excludeList);
-
-#ifdef BB_FEATURE_TAR_CREATE
-/* Local procedures to save files into a tar file. */
-static int writeTarFile(const char* tarName, int verboseFlag, char **argv,
- char** excludeList);
-#endif
-
-#if defined BB_FEATURE_TAR_EXCLUDE
-static struct option longopts[] = {
- { "exclude", 1, NULL, 'e' },
- { NULL, 0, NULL, 0 }
-};
-#endif
-
-extern int tar_main(int argc, char **argv)
-{
- char** excludeList=NULL;
- char** extractList=NULL;
- const char *tarName="-";
- const char *cwd=NULL;
-#if defined BB_FEATURE_TAR_EXCLUDE
- int excludeListSize=0;
- FILE *fileList;
- char file[256];
-#endif
-#if defined BB_FEATURE_TAR_GZIP
- FILE *comp_file = NULL;
- int unzipFlag = FALSE;
-#endif
- int listFlag = FALSE;
- int extractFlag = FALSE;
- int createFlag = FALSE;
- int verboseFlag = FALSE;
- int tostdoutFlag = FALSE;
- int status = FALSE;
- int opt;
- pid_t pid;
-
- if (argc <= 1)
- show_usage();
-
- if (argv[1][0] != '-') {
- char *tmp = xmalloc(strlen(argv[1]) + 2);
- tmp[0] = '-';
- strcpy(tmp + 1, argv[1]);
- argv[1] = tmp;
- }
-
- while (
-#ifndef BB_FEATURE_TAR_EXCLUDE
- (opt = getopt(argc, argv, "cxtzvOf:pC:"))
-#else
- (opt = getopt_long(argc, argv, "cxtzvOf:X:pC:", longopts, NULL))
-#endif
- > 0) {
- switch (opt) {
- case 'c':
- if (extractFlag == TRUE || listFlag == TRUE)
- goto flagError;
- createFlag = TRUE;
- break;
- case 'x':
- if (listFlag == TRUE || createFlag == TRUE)
- goto flagError;
- extractFlag = TRUE;
- break;
- case 't':
- if (extractFlag == TRUE || createFlag == TRUE)
- goto flagError;
- listFlag = TRUE;
- break;
-#ifdef BB_FEATURE_TAR_GZIP
- case 'z':
- unzipFlag = TRUE;
- break;
-#endif
- case 'v':
- verboseFlag = TRUE;
- break;
- case 'O':
- tostdoutFlag = TRUE;
- break;
- case 'f':
- if (*tarName != '-')
- error_msg_and_die( "Only one 'f' option allowed");
- tarName = optarg;
- break;
-#if defined BB_FEATURE_TAR_EXCLUDE
- case 'e':
- excludeList=xrealloc( excludeList,
- sizeof(char *) * (excludeListSize+2));
- excludeList[excludeListSize] = optarg;
- /* Tack a NULL onto the end of the list */
- excludeList[++excludeListSize] = NULL;
- case 'X':
- fileList = xfopen(optarg, "r");
- while (fgets(file, sizeof(file), fileList) != NULL) {
- excludeList = xrealloc(excludeList,
- sizeof(char *) * (excludeListSize+2));
- chomp(file);
- excludeList[excludeListSize] = xstrdup(file);
- /* Tack a NULL onto the end of the list */
- excludeList[++excludeListSize] = NULL;
- }
- fclose(fileList);
- break;
-#endif
- case 'p':
- break;
- case 'C':
- cwd = xgetcwd((char *)cwd);
- if (chdir(optarg)) {
- printf("cd: %s: %s\n", optarg, strerror(errno));
- return EXIT_FAILURE;
- }
- break;
- default:
- show_usage();
- }
- }
-
- /*
- * Do the correct type of action supplying the rest of the
- * command line arguments as the list of files to process.
- */
- if (createFlag == TRUE) {
-#ifndef BB_FEATURE_TAR_CREATE
- error_msg_and_die( "This version of tar was not compiled with tar creation support.");
-#else
-#ifdef BB_FEATURE_TAR_GZIP
- if (unzipFlag==TRUE)
- error_msg_and_die("Creation of compressed not internally support by tar, pipe to busybox gunzip");
-#endif
- status = writeTarFile(tarName, verboseFlag, argv + optind, excludeList);
-#endif
- }
- if (listFlag == TRUE || extractFlag == TRUE) {
- int tarFd;
- if (argv[optind])
- extractList = argv + optind;
- /* Open the tar file for reading. */
- if (!strcmp(tarName, "-"))
- tarFd = fileno(stdin);
- else
- tarFd = open(tarName, O_RDONLY);
- if (tarFd < 0)
- perror_msg_and_die("Error opening '%s'", tarName);
-
-#ifdef BB_FEATURE_TAR_GZIP
- /* unzip tarFd in a seperate process */
- if (unzipFlag == TRUE) {
- comp_file = fdopen(tarFd, "r");
-
- /* set the buffer size */
- setvbuf(comp_file, NULL, _IOFBF, 0x8000);
-
- if ((tarFd = fileno(gz_open(comp_file, &pid))) == EXIT_FAILURE) {
- error_msg_and_die("Couldnt unzip file");
- }
- }
-#endif
- status = readTarFile(tarFd, extractFlag, listFlag, tostdoutFlag,
- verboseFlag, extractList, excludeList);
- close(tarFd);
-#ifdef BB_FEATURE_TAR_GZIP
- if (unzipFlag == TRUE) {
- gz_close(pid);
- fclose(comp_file);
- }
-#endif
- }
-
- if (cwd)
- chdir(cwd);
- if (status == TRUE)
- return EXIT_SUCCESS;
- else
- return EXIT_FAILURE;
-
- flagError:
- error_msg_and_die( "Exactly one of 'c', 'x' or 't' must be specified");
-}
-
-static void
-fixUpPermissions(TarInfo *header)
-{
- struct utimbuf t;
- /* Now set permissions etc. for the new file */
- chown(header->name, header->uid, header->gid);
- chmod(header->name, header->mode);
- /* Reset the time */
- t.actime = time(0);
- t.modtime = header->mtime;
- utime(header->name, &t);
-}
-
-static int
-tarExtractRegularFile(TarInfo *header, int extractFlag, int tostdoutFlag)
-{
- size_t writeSize;
- size_t readSize;
- size_t actualWriteSz;
- char buffer[20 * TAR_BLOCK_SIZE];
- size_t size = header->size;
- int outFd=fileno(stdout);
-
- /* Open the file to be written, if a file is supposed to be written */
- if (extractFlag==TRUE && tostdoutFlag==FALSE) {
- /* Create the path to the file, just in case it isn't there...
- * This should not screw up path permissions or anything. */
- char *dir = dirname (header->name);
- make_directory (dir, -1, FILEUTILS_RECUR);
- free (dir);
- if ((outFd=open(header->name, O_CREAT|O_TRUNC|O_WRONLY,
- header->mode & ~S_IFMT)) < 0) {
- error_msg(io_error, header->name, strerror(errno));
- return( FALSE);
- }
- }
-
- /* Write out the file, if we are supposed to be doing that */
- while ( size > 0 ) {
- actualWriteSz=0;
- if ( size > sizeof(buffer) )
- writeSize = readSize = sizeof(buffer);
- else {
- int mod = size % TAR_BLOCK_SIZE;
- if ( mod != 0 )
- readSize = size + (TAR_BLOCK_SIZE - mod);
- else
- readSize = size;
- writeSize = size;
- }
- if ( (readSize = full_read(header->tarFd, buffer, readSize)) <= 0 ) {
- /* Tarball seems to have a problem */
- error_msg("Unexpected EOF in archive");
- return( FALSE);
- }
- if ( readSize < writeSize )
- writeSize = readSize;
-
- /* Write out the file, if we are supposed to be doing that */
- if (extractFlag==TRUE) {
-
- if ((actualWriteSz=full_write(outFd, buffer, writeSize)) != writeSize ) {
- /* Output file seems to have a problem */
- error_msg(io_error, header->name, strerror(errno));
- return( FALSE);
- }
- } else {
- actualWriteSz=writeSize;
- }
-
- size -= actualWriteSz;
- }
-
- /* Now we are done writing the file out, so try
- * and fix up the permissions and whatnot */
- if (extractFlag==TRUE && tostdoutFlag==FALSE) {
- close(outFd);
- fixUpPermissions(header);
- }
- return( TRUE);
-}
-
-static int
-tarExtractDirectory(TarInfo *header, int extractFlag, int tostdoutFlag)
-{
- if (extractFlag==FALSE || tostdoutFlag==TRUE)
- return( TRUE);
-
- if (make_directory(header->name, header->mode, FILEUTILS_RECUR) < 0)
- return( FALSE);
-
- fixUpPermissions(header);
- return( TRUE);
-}
-
-static int
-tarExtractHardLink(TarInfo *header, int extractFlag, int tostdoutFlag)
-{
- if (extractFlag==FALSE || tostdoutFlag==TRUE)
- return( TRUE);
-
- if (link(header->linkname, header->name) < 0) {
- perror_msg("%s: Cannot create hard link to '%s'", header->name,
- header->linkname);
- return( FALSE);
- }
-
- /* Now set permissions etc. for the new directory */
- fixUpPermissions(header);
- return( TRUE);
-}
-
-static int
-tarExtractSymLink(TarInfo *header, int extractFlag, int tostdoutFlag)
-{
- if (extractFlag==FALSE || tostdoutFlag==TRUE)
- return( TRUE);
-
-#ifdef S_ISLNK
- if (symlink(header->linkname, header->name) < 0) {
- perror_msg("%s: Cannot create symlink to '%s'", header->name,
- header->linkname);
- return( FALSE);
- }
- /* Try to change ownership of the symlink.
- * If libs doesn't support that, don't bother.
- * Changing the pointed-to-file is the Wrong Thing(tm).
- */
-#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
- lchown(header->name, header->uid, header->gid);
-#endif
-
- /* Do not change permissions or date on symlink,
- * since it changes the pointed to file instead. duh. */
-#else
- error_msg("%s: Cannot create symlink to '%s': %s",
- header->name, header->linkname,
- "symlinks not supported");
-#endif
- return( TRUE);
-}
-
-static int
-tarExtractSpecial(TarInfo *header, int extractFlag, int tostdoutFlag)
-{
- if (extractFlag==FALSE || tostdoutFlag==TRUE)
- return( TRUE);
-
- if (S_ISCHR(header->mode) || S_ISBLK(header->mode) || S_ISSOCK(header->mode)) {
- if (mknod(header->name, header->mode, makedev(header->devmajor, header->devminor)) < 0) {
- perror_msg("%s: Cannot mknod", header->name);
- return( FALSE);
- }
- } else if (S_ISFIFO(header->mode)) {
- if (mkfifo(header->name, header->mode) < 0) {
- perror_msg("%s: Cannot mkfifo", header->name);
- return( FALSE);
- }
- }
-
- /* Now set permissions etc. for the new directory */
- fixUpPermissions(header);
- return( TRUE);
-}
-
-/* Parse the tar header and fill in the nice struct with the details */
-static int
-readTarHeader(struct TarHeader *rawHeader, struct TarInfo *header)
-{
- int i;
- long chksum, sum=0;
- unsigned char *s = (unsigned char *)rawHeader;
-
- header->name = rawHeader->name;
- /* Check for and relativify any absolute paths */
- if ( *(header->name) == '/' ) {
- static int alreadyWarned=FALSE;
-
- while (*(header->name) == '/')
- header->name++;
-
- if (alreadyWarned == FALSE) {
- error_msg("Removing leading '/' from member names");
- alreadyWarned = TRUE;
- }
- }
-
- header->mode = strtol(rawHeader->mode, NULL, 8);
- header->uid = strtol(rawHeader->uid, NULL, 8);
- header->gid = strtol(rawHeader->gid, NULL, 8);
- header->size = strtol(rawHeader->size, NULL, 8);
- header->mtime = strtol(rawHeader->mtime, NULL, 8);
- chksum = strtol(rawHeader->chksum, NULL, 8);
- header->type = rawHeader->typeflag;
- header->linkname = rawHeader->linkname;
- header->devmajor = strtol(rawHeader->devmajor, NULL, 8);
- header->devminor = strtol(rawHeader->devminor, NULL, 8);
-
- /* Check the checksum */
- for (i = sizeof(*rawHeader); i-- != 0;) {
- sum += *s++;
- }
- /* Remove the effects of the checksum field (replace
- * with blanks for the purposes of the checksum) */
- s = rawHeader->chksum;
- for (i = sizeof(rawHeader->chksum) ; i-- != 0;) {
- sum -= *s++;
- }
- sum += ' ' * sizeof(rawHeader->chksum);
- if (sum == chksum )
- return ( TRUE);
- return( FALSE);
-}
-
-static int exclude_file(char **excluded_files, const char *file)
-{
- int i;
-
- if (excluded_files == NULL)
- return 0;
-
- for (i = 0; excluded_files[i] != NULL; i++) {
- if (excluded_files[i][0] == '/') {
- if (fnmatch(excluded_files[i], file,
- FNM_PATHNAME | FNM_LEADING_DIR) == 0)
- return 1;
- } else {
- const char *p;
-
- for (p = file; p[0] != '\0'; p++) {
- if ((p == file || p[-1] == '/') && p[0] != '/' &&
- fnmatch(excluded_files[i], p,
- FNM_PATHNAME | FNM_LEADING_DIR) == 0)
- return 1;
- }
- }
- }
-
- return 0;
-}
-
-static int extract_file(char **extract_files, const char *file)
-{
- int i;
-
- if (extract_files == NULL)
- return 1;
-
- for (i = 0; extract_files[i] != NULL; i++) {
- if (fnmatch(extract_files[i], file, FNM_LEADING_DIR) == 0)
- return 1;
- }
-
- return 0;
-}
-
-/*
- * Read a tar file and extract or list the specified files within it.
- * If the list is empty than all files are extracted or listed.
- */
-static int readTarFile(int tarFd, int extractFlag, int listFlag,
- int tostdoutFlag, int verboseFlag, char** extractList,
- char** excludeList)
-{
- int status;
- int errorFlag=FALSE;
- int skipNextHeaderFlag=FALSE;
- TarHeader rawHeader;
- TarInfo header;
-
- /* Read the tar file, and iterate over it one file at a time */
- while ( (status = full_read(tarFd, (char*)&rawHeader, TAR_BLOCK_SIZE)) == TAR_BLOCK_SIZE ) {
-
- /* Try to read the header */
- if ( readTarHeader(&rawHeader, &header) == FALSE ) {
- if ( *(header.name) == '\0' ) {
- goto endgame;
- } else {
- errorFlag=TRUE;
- error_msg("Bad tar header, skipping");
- continue;
- }
- }
- if ( *(header.name) == '\0' )
- continue;
- header.tarFd = tarFd;
-
- /* Skip funky extra GNU headers that precede long files */
- if ( (header.type == GNULONGNAME) || (header.type == GNULONGLINK) ) {
- skipNextHeaderFlag=TRUE;
- if (tarExtractRegularFile(&header, FALSE, FALSE) == FALSE)
- errorFlag = TRUE;
- continue;
- }
- if ( skipNextHeaderFlag == TRUE ) {
- skipNextHeaderFlag=FALSE;
- error_msg(name_longer_than_foo, NAME_SIZE);
- if (tarExtractRegularFile(&header, FALSE, FALSE) == FALSE)
- errorFlag = TRUE;
- continue;
- }
-
-#if defined BB_FEATURE_TAR_EXCLUDE
- if (exclude_file(excludeList, header.name)) {
- /* There are not the droids you're looking for, move along */
- /* If it is a regular file, pretend to extract it with
- * the extractFlag set to FALSE, so the junk in the tarball
- * is properly skipped over */
- if ( header.type==REGTYPE || header.type==REGTYPE0 ) {
- if (tarExtractRegularFile(&header, FALSE, FALSE) == FALSE)
- errorFlag = TRUE;
- }
- continue;
- }
-#endif
-
- if (!extract_file(extractList, header.name)) {
- /* There are not the droids you're looking for, move along */
- /* If it is a regular file, pretend to extract it with
- * the extractFlag set to FALSE, so the junk in the tarball
- * is properly skipped over */
- if ( header.type==REGTYPE || header.type==REGTYPE0 ) {
- if (tarExtractRegularFile(&header, FALSE, FALSE) == FALSE)
- errorFlag = TRUE;
- }
- continue;
- }
-
- if (listFlag == TRUE) {
- /* Special treatment if the list (-t) flag is on */
- if (verboseFlag == TRUE) {
- int len, len1;
- char buf[35];
- struct tm *tm = localtime (&(header.mtime));
-
- len=printf("%s ", mode_string(header.mode));
- my_getpwuid(buf, header.uid);
- if (! *buf)
- len+=printf("%d", header.uid);
- else
- len+=printf("%s", buf);
- my_getgrgid(buf, header.gid);
- if (! *buf)
- len+=printf("/%-d ", header.gid);
- else
- len+=printf("/%-s ", buf);
-
- if (header.type==CHRTYPE || header.type==BLKTYPE) {
- len1=snprintf(buf, sizeof(buf), "%ld,%-ld ",
- header.devmajor, header.devminor);
- } else {
- len1=snprintf(buf, sizeof(buf), "%lu ", (long)header.size);
- }
- /* Jump through some hoops to make the columns match up */
- for(;(len+len1)<31;len++)
- printf(" ");
- printf(buf);
-
- /* Use ISO 8610 time format */
- if (tm) {
- printf ("%04d-%02d-%02d %02d:%02d:%02d ",
- tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
- tm->tm_hour, tm->tm_min, tm->tm_sec);
- }
- }
- printf("%s", header.name);
- if (verboseFlag == TRUE) {
- if (header.type==LNKTYPE) /* If this is a link, say so */
- printf(" link to %s", header.linkname);
- else if (header.type==SYMTYPE)
- printf(" -> %s", header.linkname);
- }
- printf("\n");
- }
-
- /* List contents if we are supposed to do that */
- if (verboseFlag == TRUE && extractFlag == TRUE) {
- /* Now the normal listing */
- FILE *vbFd = stdout;
- if (tostdoutFlag == TRUE) // If the archive goes to stdout, verbose to stderr
- vbFd = stderr;
- fprintf(vbFd, "%s\n", header.name);
- }
-
- /* Remove files if we would overwrite them */
- if (extractFlag == TRUE && tostdoutFlag == FALSE)
- unlink(header.name);
-
- /* If we got here, we can be certain we have a legitimate
- * header to work with. So work with it. */
- switch ( header.type ) {
- case REGTYPE:
- case REGTYPE0:
- /* If the name ends in a '/' then assume it is
- * supposed to be a directory, and fall through */
- if (!last_char_is(header.name,'/')) {
- if (tarExtractRegularFile(&header, extractFlag, tostdoutFlag)==FALSE)
- errorFlag=TRUE;
- break;
- }
- case DIRTYPE:
- if (tarExtractDirectory( &header, extractFlag, tostdoutFlag)==FALSE)
- errorFlag=TRUE;
- break;
- case LNKTYPE:
- if (tarExtractHardLink( &header, extractFlag, tostdoutFlag)==FALSE)
- errorFlag=TRUE;
- break;
- case SYMTYPE:
- if (tarExtractSymLink( &header, extractFlag, tostdoutFlag)==FALSE)
- errorFlag=TRUE;
- break;
- case CHRTYPE:
- case BLKTYPE:
- case FIFOTYPE:
- if (tarExtractSpecial( &header, extractFlag, tostdoutFlag)==FALSE)
- errorFlag=TRUE;
- break;
- default:
- error_msg("Unknown file type '%c' in tar file", header.type);
- close( tarFd);
- return( FALSE);
- }
- }
- close(tarFd);
- if (status > 0) {
- /* Bummer - we read a partial header */
- perror_msg("Error reading tar file");
- return ( FALSE);
- }
- else if (errorFlag==TRUE) {
- error_msg( "Error exit delayed from previous errors");
- return( FALSE);
- } else
- return( status);
-
- /* Stuff to do when we are done */
-endgame:
- close( tarFd);
- if ( *(header.name) == '\0' ) {
- if (errorFlag==TRUE)
- error_msg( "Error exit delayed from previous errors");
- else
- return( TRUE);
- }
- return( FALSE);
-}
-
-
-#ifdef BB_FEATURE_TAR_CREATE
-
-/*
-** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
-** the only functions that deal with the HardLinkInfo structure.
-** Even these functions use the xxxHardLinkInfo() functions.
-*/
-typedef struct HardLinkInfo HardLinkInfo;
-struct HardLinkInfo
-{
- HardLinkInfo *next; /* Next entry in list */
- dev_t dev; /* Device number */
- ino_t ino; /* Inode number */
- short linkCount; /* (Hard) Link Count */
- char name[1]; /* Start of filename (must be last) */
-};
-
-/* Some info to be carried along when creating a new tarball */
-struct TarBallInfo
-{
- char* fileName; /* File name of the tarball */
- int tarFd; /* Open-for-write file descriptor
- for the tarball */
- struct stat statBuf; /* Stat info for the tarball, letting
- us know the inode and device that the
- tarball lives, so we can avoid trying
- to include the tarball into itself */
- int verboseFlag; /* Whether to print extra stuff or not */
- char** excludeList; /* List of files to not include */
- HardLinkInfo *hlInfoHead; /* Hard Link Tracking Information */
- HardLinkInfo *hlInfo; /* Hard Link Info for the current file */
-};
-typedef struct TarBallInfo TarBallInfo;
-
-
-/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
-static void
-addHardLinkInfo (HardLinkInfo **hlInfoHeadPtr, dev_t dev, ino_t ino,
- short linkCount, const char *name)
-{
- /* Note: hlInfoHeadPtr can never be NULL! */
- HardLinkInfo *hlInfo;
-
- hlInfo = (HardLinkInfo *)xmalloc(sizeof(HardLinkInfo)+strlen(name)+1);
- if (hlInfo) {
- hlInfo->next = *hlInfoHeadPtr;
- *hlInfoHeadPtr = hlInfo;
- hlInfo->dev = dev;
- hlInfo->ino = ino;
- hlInfo->linkCount = linkCount;
- strcpy(hlInfo->name, name);
- }
- return;
-}
-
-static void
-freeHardLinkInfo (HardLinkInfo **hlInfoHeadPtr)
-{
- HardLinkInfo *hlInfo = NULL;
- HardLinkInfo *hlInfoNext = NULL;
-
- if (hlInfoHeadPtr) {
- hlInfo = *hlInfoHeadPtr;
- while (hlInfo) {
- hlInfoNext = hlInfo->next;
- free(hlInfo);
- hlInfo = hlInfoNext;
- }
- *hlInfoHeadPtr = NULL;
- }
- return;
-}
-
-/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
-static HardLinkInfo *
-findHardLinkInfo (HardLinkInfo *hlInfo, dev_t dev, ino_t ino)
-{
- while(hlInfo) {
- if ((ino == hlInfo->ino) && (dev == hlInfo->dev))
- break;
- hlInfo = hlInfo->next;
- }
- return(hlInfo);
-}
-
-/* Put an octal string into the specified buffer.
- * The number is zero and space padded and possibly null padded.
- * Returns TRUE if successful. */
-static int putOctal (char *cp, int len, long value)
-{
- int tempLength;
- char tempBuffer[32];
- char *tempString = tempBuffer;
-
- /* Create a string of the specified length with an initial space,
- * leading zeroes and the octal number, and a trailing null. */
- sprintf (tempString, "%0*lo", len - 1, value);
-
- /* If the string is too large, suppress the leading space. */
- tempLength = strlen (tempString) + 1;
- if (tempLength > len) {
- tempLength--;
- tempString++;
- }
-
- /* If the string is still too large, suppress the trailing null. */
- if (tempLength > len)
- tempLength--;
-
- /* If the string is still too large, fail. */
- if (tempLength > len)
- return FALSE;
-
- /* Copy the string to the field. */
- memcpy (cp, tempString, len);
-
- return TRUE;
-}
-
-/* Write out a tar header for the specified file/directory/whatever */
-static int
-writeTarHeader(struct TarBallInfo *tbInfo, const char *header_name,
- const char *real_name, struct stat *statbuf)
-{
- long chksum=0;
- struct TarHeader header;
- const unsigned char *cp = (const unsigned char *) &header;
- ssize_t size = sizeof(struct TarHeader);
-
- memset( &header, 0, size);
-
- strncpy(header.name, header_name, sizeof(header.name));
-
- putOctal(header.mode, sizeof(header.mode), statbuf->st_mode);
- putOctal(header.uid, sizeof(header.uid), statbuf->st_uid);
- putOctal(header.gid, sizeof(header.gid), statbuf->st_gid);
- putOctal(header.size, sizeof(header.size), 0); /* Regular file size is handled later */
- putOctal(header.mtime, sizeof(header.mtime), statbuf->st_mtime);
- strncpy(header.magic, TAR_MAGIC TAR_VERSION,
- TAR_MAGIC_LEN + TAR_VERSION_LEN );
-
- /* Enter the user and group names (default to root if it fails) */
- my_getpwuid(header.uname, statbuf->st_uid);
- if (! *header.uname)
- strcpy(header.uname, "root");
- my_getgrgid(header.gname, statbuf->st_gid);
- if (! *header.uname)
- strcpy(header.uname, "root");
-
- if (tbInfo->hlInfo) {
- /* This is a hard link */
- header.typeflag = LNKTYPE;
- strncpy(header.linkname, tbInfo->hlInfo->name, sizeof(header.linkname));
- } else if (S_ISLNK(statbuf->st_mode)) {
- char *lpath = xreadlink(real_name);
- if (!lpath) /* Already printed err msg inside xreadlink() */
- return ( FALSE);
- header.typeflag = SYMTYPE;
- strncpy(header.linkname, lpath, sizeof(header.linkname));
- free(lpath);
- } else if (S_ISDIR(statbuf->st_mode)) {
- header.typeflag = DIRTYPE;
- strncat(header.name, "/", sizeof(header.name));
- } else if (S_ISCHR(statbuf->st_mode)) {
- header.typeflag = CHRTYPE;
- putOctal(header.devmajor, sizeof(header.devmajor), MAJOR(statbuf->st_rdev));
- putOctal(header.devminor, sizeof(header.devminor), MINOR(statbuf->st_rdev));
- } else if (S_ISBLK(statbuf->st_mode)) {
- header.typeflag = BLKTYPE;
- putOctal(header.devmajor, sizeof(header.devmajor), MAJOR(statbuf->st_rdev));
- putOctal(header.devminor, sizeof(header.devminor), MINOR(statbuf->st_rdev));
- } else if (S_ISFIFO(statbuf->st_mode)) {
- header.typeflag = FIFOTYPE;
- } else if (S_ISREG(statbuf->st_mode)) {
- header.typeflag = REGTYPE;
- putOctal(header.size, sizeof(header.size), statbuf->st_size);
- } else {
- error_msg("%s: Unknown file type", real_name);
- return ( FALSE);
- }
-
- /* Calculate and store the checksum (i.e., the sum of all of the bytes of
- * the header). The checksum field must be filled with blanks for the
- * calculation. The checksum field is formatted differently from the
- * other fields: it has [6] digits, a null, then a space -- rather than
- * digits, followed by a null like the other fields... */
- memset(header.chksum, ' ', sizeof(header.chksum));
- cp = (const unsigned char *) &header;
- while (size-- > 0)
- chksum += *cp++;
- putOctal(header.chksum, 7, chksum);
-
- /* Now write the header out to disk */
- if ((size=full_write(tbInfo->tarFd, (char*)&header, sizeof(struct TarHeader))) < 0) {
- error_msg(io_error, real_name, strerror(errno));
- return ( FALSE);
- }
- /* Pad the header up to the tar block size */
- for (; size<TAR_BLOCK_SIZE; size++) {
- write(tbInfo->tarFd, "\0", 1);
- }
- /* Now do the verbose thing (or not) */
- if (tbInfo->verboseFlag==TRUE) {
- FILE *vbFd = stdout;
- if (tbInfo->tarFd == fileno(stdout)) // If the archive goes to stdout, verbose to stderr
- vbFd = stderr;
- fprintf(vbFd, "%s\n", header.name);
- }
-
- return ( TRUE);
-}
-
-
-static int writeFileToTarball(const char *fileName, struct stat *statbuf, void* userData)
-{
- struct TarBallInfo *tbInfo = (struct TarBallInfo *)userData;
- const char *header_name;
-
- /*
- ** Check to see if we are dealing with a hard link.
- ** If so -
- ** Treat the first occurance of a given dev/inode as a file while
- ** treating any additional occurances as hard links. This is done
- ** by adding the file information to the HardLinkInfo linked list.
- */
- tbInfo->hlInfo = NULL;
- if (statbuf->st_nlink > 1) {
- tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf->st_dev,
- statbuf->st_ino);
- if (tbInfo->hlInfo == NULL)
- addHardLinkInfo (&tbInfo->hlInfoHead, statbuf->st_dev,
- statbuf->st_ino, statbuf->st_nlink, fileName);
- }
-
- /* It is against the rules to archive a socket */
- if (S_ISSOCK(statbuf->st_mode)) {
- error_msg("%s: socket ignored", fileName);
- return( TRUE);
- }
-
- /* It is a bad idea to store the archive we are in the process of creating,
- * so check the device and inode to be sure that this particular file isn't
- * the new tarball */
- if (tbInfo->statBuf.st_dev == statbuf->st_dev &&
- tbInfo->statBuf.st_ino == statbuf->st_ino) {
- error_msg("%s: file is the archive; skipping", fileName);
- return( TRUE);
- }
-
- header_name = fileName;
- while (header_name[0] == '/') {
- static int alreadyWarned=FALSE;
- if (alreadyWarned==FALSE) {
- error_msg("Removing leading '/' from member names");
- alreadyWarned=TRUE;
- }
- header_name++;
- }
-
- if (strlen(fileName) >= NAME_SIZE) {
- error_msg(name_longer_than_foo, NAME_SIZE);
- return ( TRUE);
- }
-
- if (header_name[0] == '\0')
- return TRUE;
-
-#if defined BB_FEATURE_TAR_EXCLUDE
- if (exclude_file(tbInfo->excludeList, header_name)) {
- return SKIP;
- }
-#endif
-
- if (writeTarHeader(tbInfo, header_name, fileName, statbuf)==FALSE) {
- return( FALSE);
- }
-
- /* Now, if the file is a regular file, copy it out to the tarball */
- if ((tbInfo->hlInfo == NULL)
- && (S_ISREG(statbuf->st_mode))) {
- int inputFileFd;
- char buffer[BUFSIZ];
- ssize_t size=0, readSize=0;
-
- /* open the file we want to archive, and make sure all is well */
- if ((inputFileFd = open(fileName, O_RDONLY)) < 0) {
- error_msg("%s: Cannot open: %s", fileName, strerror(errno));
- return( FALSE);
- }
-
- /* write the file to the archive */
- while ( (size = full_read(inputFileFd, buffer, sizeof(buffer))) > 0 ) {
- if (full_write(tbInfo->tarFd, buffer, size) != size ) {
- /* Output file seems to have a problem */
- error_msg(io_error, fileName, strerror(errno));
- return( FALSE);
- }
- readSize+=size;
- }
- if (size == -1) {
- error_msg(io_error, fileName, strerror(errno));
- return( FALSE);
- }
- /* Pad the file up to the tar block size */
- for (; (readSize%TAR_BLOCK_SIZE) != 0; readSize++) {
- write(tbInfo->tarFd, "\0", 1);
- }
- close( inputFileFd);
- }
-
- return( TRUE);
-}
-
-static int writeTarFile(const char* tarName, int verboseFlag, char **argv,
- char** excludeList)
-{
- int tarFd=-1;
- int errorFlag=FALSE;
- ssize_t size;
- struct TarBallInfo tbInfo;
- tbInfo.verboseFlag = verboseFlag;
- tbInfo.hlInfoHead = NULL;
-
- /* Make sure there is at least one file to tar up. */
- if (*argv == NULL)
- error_msg_and_die("Cowardly refusing to create an empty archive");
-
- /* Open the tar file for writing. */
- if (!strcmp(tarName, "-"))
- tbInfo.tarFd = fileno(stdout);
- else
- tbInfo.tarFd = open (tarName, O_WRONLY | O_CREAT | O_TRUNC, 0644);
- if (tbInfo.tarFd < 0) {
- perror_msg( "Error opening '%s'", tarName);
- freeHardLinkInfo(&tbInfo.hlInfoHead);
- return ( FALSE);
- }
- tbInfo.excludeList=excludeList;
- /* Store the stat info for the tarball's file, so
- * can avoid including the tarball into itself.... */
- if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
- error_msg_and_die(io_error, tarName, strerror(errno));
-
- /* Read the directory/files and iterate over them one at a time */
- while (*argv != NULL) {
- if (recursive_action(*argv++, TRUE, FALSE, FALSE,
- writeFileToTarball, writeFileToTarball,
- (void*) &tbInfo) == FALSE) {
- errorFlag = TRUE;
- }
- }
- /* Write two empty blocks to the end of the archive */
- for (size=0; size<(2*TAR_BLOCK_SIZE); size++) {
- write(tbInfo.tarFd, "\0", 1);
- }
-
- /* To be pedantically correct, we would check if the tarball
- * is smaller than 20 tar blocks, and pad it if it was smaller,
- * but that isn't necessary for GNU tar interoperability, and
- * so is considered a waste of space */
-
- /* Hang up the tools, close up shop, head home */
- close(tarFd);
- if (errorFlag == TRUE) {
- error_msg("Error exit delayed from previous errors");
- freeHardLinkInfo(&tbInfo.hlInfoHead);
- return(FALSE);
- }
- freeHardLinkInfo(&tbInfo.hlInfoHead);
- return( TRUE);
-}
-
-
-#endif
-