/*
* Mini tar implementation for busybox
*
+ * Modifed to use common extraction code used by ar, cpio, dpkg-deb, dpkg
+ * Glenn McGrath <bug1@optushome.com.au>
+ *
* 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)
+ * 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>
+ * Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org>
*
* Based in part in the tar implementation in sash
* Copyright (c) 1999 by David I. Bell
*
*/
-
-#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 <search.h>
+#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
+#include <fnmatch.h>
+#include <string.h>
+#include <errno.h>
+#include <signal.h>
+#include <sys/wait.h>
+#include <sys/socket.h>
+#include "unarchive.h"
#include "busybox.h"
-#define BB_DECLARE_EXTERN
-#define bb_need_io_error
-#define bb_need_name_longer_than_foo
-#include "messages.c"
-#ifdef BB_FEATURE_TAR_GZIP
-extern int unzip(int in, int out);
-#endif
+#ifdef CONFIG_FEATURE_TAR_CREATE
/* Tar file constants */
-#ifndef MAJOR
-#define MAJOR(dev) (((dev)>>8)&0xff)
-#define MINOR(dev) ((dev)&0xff)
-#endif
+# define TAR_MAGIC "ustar" /* ustar and a null */
+# define TAR_VERSION " " /* Be compatable with GNU tar format */
-enum { NAME_SIZE = 100 }; /* because gcc won't let me use 'static const int' */
+# ifndef MAJOR
+# define MAJOR(dev) (((dev)>>8)&0xff)
+# define MINOR(dev) ((dev)&0xff)
+# endif
-/* 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_BLOCK_SIZE = 512;
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. */
-extern 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
-
-#ifdef BB_FEATURE_TAR_GZIP
-/* Signal handler for when child gzip process dies... */
-static void child_died()
-{
- fflush(stdout);
- fflush(stderr);
- exit(EXIT_FAILURE);
-}
-
-extern int tar_unzip_init(int tarFd)
-{
- int child_pid;
- static int unzip_pipe[2];
- /* Cope if child dies... Otherwise we block forever in read()... */
- signal(SIGCHLD, child_died);
-
- if (pipe(unzip_pipe)!=0)
- error_msg_and_die("pipe error");
-
- if ( (child_pid = fork()) == -1)
- error_msg_and_die("fork failure");
-
- if (child_pid==0) {
- /* child process */
- close(unzip_pipe[0]);
-// gunzip_init();
- unzip(tarFd, unzip_pipe[1]);
- exit(EXIT_SUCCESS);
- }
- else {
- /* return fd of uncompressed data to parent process */
- close(unzip_pipe[1]);
- return(unzip_pipe[0]);
- }
-}
-#endif
-
-#if defined BB_FEATURE_TAR_EXCLUDE
-static struct option longopts[] = {
- { "exclude", 1, NULL, 'e' },
- { NULL, 0, NULL, 0 }
+/* POSIX tar Header Block, from POSIX 1003.1-1990 */
+enum { NAME_SIZE = 100 }; /* because gcc won't let me use 'static const int' */
+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) */
};
-#endif
-
-extern int tar_main(int argc, char **argv)
-{
- char** excludeList=NULL;
- char** extractList=NULL;
- const char *tarName="-";
-#if defined BB_FEATURE_TAR_EXCLUDE
- int excludeListSize=0;
- FILE *fileList;
- char file[256];
-#endif
-#if defined BB_FEATURE_TAR_GZIP
- int unzipFlag = FALSE;
-#endif
- int listFlag = FALSE;
- int extractFlag = FALSE;
- int createFlag = FALSE;
- int verboseFlag = FALSE;
- int tostdoutFlag = FALSE;
- int status = FALSE;
- int opt;
-
- 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:"))
-#else
- (opt = getopt_long(argc, argv, "cxtzvOf:X:", 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
- 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)
- tarFd = tar_unzip_init(tarFd);
-#endif
- status = readTarFile(tarFd, extractFlag, listFlag, tostdoutFlag,
- verboseFlag, extractList, excludeList);
- }
-
- 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[BUFSIZ];
- 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. */
- create_path(header->name, 0777);
- 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 % 512;
- if ( mod != 0 )
- readSize = size + (512 - 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 (create_path(header->name, header->mode) != TRUE) {
- perror_msg("%s: Cannot mkdir", header->name);
- return( FALSE);
- }
- /* make the final component, just in case it was
- * omitted by create_path() (which will skip the
- * directory if it doesn't have a terminating '/') */
- if (mkdir(header->name, header->mode) < 0 && errno != EEXIST) {
- perror_msg("%s", header->name);
- 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);
-}
-
-/* Read an octal value in a field of the specified width, with optional
- * spaces on both sides of the number and with an optional null character
- * at the end. Returns -1 on an illegal format. */
-static long getOctal(const char *cp, int size)
-{
- long val = 0;
-
- for(;(size > 0) && (*cp == ' '); cp++, size--);
- if ((size == 0) || !is_octal(*cp))
- return -1;
- for(; (size > 0) && is_octal(*cp); size--) {
- val = val * 8 + *cp++ - '0';
- }
- for (;(size > 0) && (*cp == ' '); cp++, size--);
- if ((size > 0) && *cp)
- return -1;
- return val;
-}
-
-
-/* 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 = getOctal(rawHeader->mode, sizeof(rawHeader->mode));
- header->uid = getOctal(rawHeader->uid, sizeof(rawHeader->uid));
- header->gid = getOctal(rawHeader->gid, sizeof(rawHeader->gid));
- header->size = getOctal(rawHeader->size, sizeof(rawHeader->size));
- header->mtime = getOctal(rawHeader->mtime, sizeof(rawHeader->mtime));
- chksum = getOctal(rawHeader->chksum, sizeof(rawHeader->chksum));
- header->type = rawHeader->typeflag;
- header->linkname = rawHeader->linkname;
- header->devmajor = getOctal(rawHeader->devmajor, sizeof(rawHeader->devmajor));
- header->devminor = getOctal(rawHeader->devminor, sizeof(rawHeader->devminor));
-
- /* 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.
- */
-extern 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;
-
- /* Set the umask for this process so it doesn't
- * screw up permission setting for us later. */
- umask(0);
-
- /* 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' )
- goto endgame;
- 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 (header.name[strlen(header.name)-1] != '/') {
- 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;
-#if 0
- /* Handled earlier */
- case GNULONGNAME:
- case GNULONGLINK:
- skipNextHeaderFlag=TRUE;
- break;
-#endif
- 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
+typedef struct TarHeader TarHeader;
/*
** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
** 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) */
+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 */
+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 */
+ const llist_t *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;
+/* 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;
/* 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)
+static inline void addHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr,
+ struct stat *statbuf,
+ 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;
+ hlInfo = (HardLinkInfo *) xmalloc(sizeof(HardLinkInfo) + strlen(name));
+ hlInfo->next = *hlInfoHeadPtr;
+ *hlInfoHeadPtr = hlInfo;
+ hlInfo->dev = statbuf->st_dev;
+ hlInfo->ino = statbuf->st_ino;
+ hlInfo->linkCount = statbuf->st_nlink;
+ strcpy(hlInfo->name, name);
}
-static void
-freeHardLinkInfo (HardLinkInfo **hlInfoHeadPtr)
+static void freeHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr)
{
HardLinkInfo *hlInfo = NULL;
HardLinkInfo *hlInfoNext = NULL;
}
/* 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)
+static inline HardLinkInfo *findHardLinkInfo(HardLinkInfo * hlInfo, struct stat *statbuf)
{
- while(hlInfo) {
- if ((ino == hlInfo->ino) && (dev == hlInfo->dev))
+ while (hlInfo) {
+ if ((statbuf->st_ino == hlInfo->ino) && (statbuf->st_dev == hlInfo->dev))
break;
hlInfo = hlInfo->next;
}
- return(hlInfo);
+ 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)
+ * Returns TRUE if successful. */
+static int putOctal(char *cp, int len, long value)
{
int tempLength;
char tempBuffer[32];
/* 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);
+ sprintf(tempString, "%0*lo", len - 1, value);
/* If the string is too large, suppress the leading space. */
- tempLength = strlen (tempString) + 1;
+ tempLength = strlen(tempString) + 1;
if (tempLength > len) {
tempLength--;
tempString++;
return FALSE;
/* Copy the string to the field. */
- memcpy (cp, tempString, len);
+ 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)
+static inline int writeTarHeader(struct TarBallInfo *tbInfo,
+ const char *header_name,
+ const char *real_name, struct stat *statbuf)
{
- long chksum=0;
+ 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));
+ 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.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 );
+ 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)
+ if (my_getpwuid(header.uname, statbuf->st_uid) == NULL)
strcpy(header.uname, "root");
+ if (my_getgrgid(header.gname, statbuf->st_gid) == NULL)
+ strcpy(header.gname, "root");
if (tbInfo->hlInfo) {
/* This is a hard link */
header.typeflag = LNKTYPE;
- strncpy(header.linkname, tbInfo->hlInfo->name, sizeof(header.linkname));
+ strncpy(header.linkname, tbInfo->hlInfo->name,
+ sizeof(header.linkname));
} else if (S_ISLNK(statbuf->st_mode)) {
- int link_size=0;
- char buffer[BUFSIZ];
- header.typeflag = SYMTYPE;
- link_size = readlink(real_name, buffer, sizeof(buffer) - 1);
- if ( link_size < 0) {
- perror_msg("Error reading symlink '%s'", header.name);
- return ( FALSE);
- }
- buffer[link_size] = '\0';
- strncpy(header.linkname, buffer, sizeof(header.linkname));
+ 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));
+ 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));
+ 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));
+ 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;
+ header.typeflag = FIFOTYPE;
} else if (S_ISREG(statbuf->st_mode)) {
- header.typeflag = REGTYPE;
+ header.typeflag = REGTYPE;
putOctal(header.size, sizeof(header.size), statbuf->st_size);
} else {
- error_msg("%s: Unknown file type", real_name);
- return ( FALSE);
+ bb_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
+ /* 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
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);
+ if ((size =
+ bb_full_write(tbInfo->tarFd, (char *) &header,
+ sizeof(struct TarHeader))) < 0) {
+ bb_error_msg(bb_msg_io_error, real_name);
+ return (FALSE);
}
/* Pad the header up to the tar block size */
- for (; size<TAR_BLOCK_SIZE; size++) {
+ for (; size < TAR_BLOCK_SIZE; size++) {
write(tbInfo->tarFd, "\0", 1);
}
/* Now do the verbose thing (or not) */
- if (tbInfo->verboseFlag==TRUE) {
+
+ if (tbInfo->verboseFlag) {
FILE *vbFd = stdout;
- if (tbInfo->tarFd == fileno(stdout)) // If the archive goes to stdout, verbose to stderr
+
+ if (tbInfo->verboseFlag == 2) /* If the archive goes to stdout, verbose to stderr */
vbFd = stderr;
fprintf(vbFd, "%s\n", header.name);
}
- return ( TRUE);
+ return (TRUE);
}
+# if defined CONFIG_FEATURE_TAR_EXCLUDE
+static inline int exclude_file(const llist_t *excluded_files, const char *file)
+{
+ if (excluded_files == NULL) {
+ return 0;
+ }
-static int writeFileToTarball(const char *fileName, struct stat *statbuf, void* userData)
+ while (excluded_files) {
+ if (excluded_files->data[0] == '/') {
+ if (fnmatch(excluded_files->data, 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->data, p,
+ FNM_PATHNAME | FNM_LEADING_DIR) == 0)
+ return 1;
+ }
+ }
+ excluded_files = excluded_files->link;
+ }
+
+ return 0;
+}
+#endif
+
+static int writeFileToTarball(const char *fileName, struct stat *statbuf,
+ void *userData)
{
- struct TarBallInfo *tbInfo = (struct TarBallInfo *)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.
- */
+ ** 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);
+ tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf);
if (tbInfo->hlInfo == NULL)
- addHardLinkInfo (&tbInfo->hlInfoHead, statbuf->st_dev,
- statbuf->st_ino, statbuf->st_nlink, fileName);
+ addHardLinkInfo(&tbInfo->hlInfoHead, statbuf, fileName);
}
/* It is against the rules to archive a socket */
if (S_ISSOCK(statbuf->st_mode)) {
- error_msg("%s: socket ignored", fileName);
- return( TRUE);
+ bb_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);
+ tbInfo->statBuf.st_ino == statbuf->st_ino) {
+ bb_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;
+ static int alreadyWarned = FALSE;
+
+ if (alreadyWarned == FALSE) {
+ bb_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);
+ bb_error_msg(bb_msg_name_longer_than_foo, NAME_SIZE);
+ return (TRUE);
}
if (header_name[0] == '\0')
return TRUE;
-#if defined BB_FEATURE_TAR_EXCLUDE
+# if defined CONFIG_FEATURE_TAR_EXCLUDE
if (exclude_file(tbInfo->excludeList, header_name)) {
return SKIP;
}
-#endif
+# endif /* CONFIG_FEATURE_TAR_EXCLUDE */
- if (writeTarHeader(tbInfo, header_name, fileName, statbuf)==FALSE) {
- return( FALSE);
- }
+ 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;
+ && (S_ISREG(statbuf->st_mode))) {
+ int inputFileFd;
char buffer[BUFSIZ];
- ssize_t size=0, readSize=0;
+ 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);
+ bb_perror_msg("%s: Cannot open", fileName);
+ 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 ) {
+ while ((size = bb_full_read(inputFileFd, buffer, sizeof(buffer))) > 0) {
+ if (bb_full_write(tbInfo->tarFd, buffer, size) != size) {
/* Output file seems to have a problem */
- error_msg(io_error, fileName, strerror(errno));
- return( FALSE);
+ bb_error_msg(bb_msg_io_error, fileName);
+ return (FALSE);
}
- readSize+=size;
+ readSize += size;
}
if (size == -1) {
- error_msg(io_error, fileName, strerror(errno));
- return( FALSE);
+ bb_error_msg(bb_msg_io_error, fileName);
+ return (FALSE);
}
/* Pad the file up to the tar block size */
- for (; (readSize%TAR_BLOCK_SIZE) != 0; readSize++) {
+ for (; (readSize % TAR_BLOCK_SIZE) != 0; readSize++) {
write(tbInfo->tarFd, "\0", 1);
}
- close( inputFileFd);
+ close(inputFileFd);
}
- return( TRUE);
+ return (TRUE);
}
-static int writeTarFile(const char* tarName, int verboseFlag, char **argv,
- char** excludeList)
+static inline int writeTarFile(const char *tarName, const int verboseFlag,
+ const llist_t *include, const llist_t *exclude, const int gzip)
{
- int tarFd=-1;
- int errorFlag=FALSE;
+#ifdef CONFIG_FEATURE_TAR_GZIP
+ int gzipDataPipe[2] = { -1, -1 };
+ int gzipStatusPipe[2] = { -1, -1 };
+ pid_t gzipPid = 0;
+ volatile int vfork_exec_errno = 0;
+#endif
+
+ 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");
+ if (include == NULL) {
+ bb_error_msg_and_die("Cowardly refusing to create an empty archive");
+ }
/* Open the tar file for writing. */
- if (!strcmp(tarName, "-"))
+ if (tarName == NULL || (tarName[0] == '-' && tarName[1] == '\0')) {
tbInfo.tarFd = fileno(stdout);
- else
- tbInfo.tarFd = open (tarName, O_WRONLY | O_CREAT | O_TRUNC, 0644);
+ tbInfo.verboseFlag = verboseFlag ? 2 : 0;
+ } else {
+ unlink(tarName);
+ tbInfo.tarFd = open(tarName, O_WRONLY | O_CREAT | O_EXCL, 0644);
+ tbInfo.verboseFlag = verboseFlag ? 1 : 0;
+ }
+
if (tbInfo.tarFd < 0) {
- perror_msg( "Error opening '%s'", tarName);
+ bb_perror_msg("%s: Cannot open", tarName);
freeHardLinkInfo(&tbInfo.hlInfoHead);
- return ( FALSE);
+ 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));
+ bb_error_msg_and_die(bb_msg_io_error, tarName);
+
+#ifdef CONFIG_FEATURE_TAR_GZIP
+ if (gzip) {
+ if (pipe(gzipDataPipe) < 0 || pipe(gzipStatusPipe) < 0) {
+ bb_perror_msg_and_die("Failed to create gzip pipe");
+ }
+
+ signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */
- /* Set the umask for this process so it doesn't
- * screw up permission setting for us later. */
- umask(0);
+# if __GNUC__
+ /* Avoid vfork clobbering */
+ (void) &include;
+ (void) &errorFlag;
+# endif
+
+ gzipPid = vfork();
+
+ if (gzipPid == 0) {
+ dup2(gzipDataPipe[0], 0);
+ close(gzipDataPipe[1]);
+
+ if (tbInfo.tarFd != 1);
+ dup2(tbInfo.tarFd, 1);
+
+ close(gzipStatusPipe[0]);
+ fcntl(gzipStatusPipe[1], F_SETFD, FD_CLOEXEC); /* close on exec shows sucess */
+
+ execl("/bin/gzip", "gzip", "-f", 0);
+ vfork_exec_errno = errno;
+
+ close(gzipStatusPipe[1]);
+ exit(-1);
+ } else if (gzipPid > 0) {
+ close(gzipDataPipe[0]);
+ close(gzipStatusPipe[1]);
+
+ while (1) {
+ char buf;
+
+ int n = bb_full_read(gzipStatusPipe[0], &buf, 1);
+
+ if (n == 0 && vfork_exec_errno != 0) {
+ errno = vfork_exec_errno;
+ bb_perror_msg_and_die("Could not exec gzip process");
+ } else if ((n < 0) && (errno == EAGAIN || errno == EINTR))
+ continue; /* try it again */
+ break;
+ }
+ close(gzipStatusPipe[0]);
+
+ tbInfo.tarFd = gzipDataPipe[1];
+ } else {
+ bb_perror_msg_and_die("Failed to vfork gzip process");
+ }
+ }
+#endif
+
+ tbInfo.excludeList = exclude;
/* 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) {
+ while (include) {
+ if (!recursive_action(include->data, TRUE, FALSE, FALSE,
+ writeFileToTarball, writeFileToTarball,
+ (void *) &tbInfo)) {
errorFlag = TRUE;
}
+ include = include->link;
}
/* Write two empty blocks to the end of the archive */
- for (size=0; size<(2*TAR_BLOCK_SIZE); size++) {
+ for (size = 0; size < (2 * TAR_BLOCK_SIZE); size++) {
write(tbInfo.tarFd, "\0", 1);
}
* 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);
- }
+ close(tbInfo.tarFd);
+ if (errorFlag)
+ bb_error_msg("Error exit delayed from previous errors");
+
freeHardLinkInfo(&tbInfo.hlInfoHead);
- return( TRUE);
+
+#ifdef CONFIG_FEATURE_TAR_GZIP
+ if (gzip && gzipPid) {
+ if (waitpid(gzipPid, NULL, 0) == -1)
+ printf("Couldnt wait ?");
+ }
+#endif
+
+ return !errorFlag;
}
+#endif /* tar_create */
+
+#ifdef CONFIG_FEATURE_TAR_EXCLUDE
+static llist_t *append_file_list_to_list(llist_t *list)
+{
+ FILE *src_stream;
+ llist_t *cur = list;
+ llist_t *tmp;
+ char *line;
+ llist_t *newlist = NULL;
+
+ while(cur) {
+ src_stream = bb_xfopen(cur->data, "r");
+ tmp = cur;
+ cur = cur->link;
+ free(tmp);
+ while((line = bb_get_chomped_line_from_file(src_stream)) != NULL) {
+ newlist = llist_add_to(newlist, line);
+ }
+ fclose(src_stream);
+ }
+ return newlist;
+}
+#endif
+static const char tar_options[]="ctxjT:X:C:f:Opvz";
+#define CTX_CREATE 1
+#define CTX_TEST 2
+#define CTX_EXTRACT 4
+#define TAR_OPT_BZIP2 8
+#define TAR_OPT_INCLUDE 16
+#define TAR_OPT_EXCLUDE 32
+#define TAR_OPT_BASEDIR 64
+#define TAR_OPT_ARNAME 128
+#define TAR_OPT_2STDOUT 256
+#define TAR_OPT_P 512
+#define TAR_OPT_VERBOSE 1024
+#define TAR_OPT_GZIP 2048
+
+int tar_main(int argc, char **argv)
+{
+ char (*get_header_ptr)(archive_handle_t *) = get_header_tar;
+ archive_handle_t *tar_handle;
+ int opt;
+ char *base_dir = NULL;
+ const char *tar_filename = "-";
+ unsigned char ctx_flag = 0;
+
+ if (argc < 2) {
+ bb_show_usage();
+ }
+
+ /* Prepend '-' to the first argument if required */
+ if (argv[1][0] != '-') {
+ char *tmp;
+
+ bb_xasprintf(&tmp, "-%s", argv[1]);
+ argv[1] = tmp;
+ }
+
+ /* Initialise default values */
+ tar_handle = init_handle();
+ tar_handle->flags = ARCHIVE_CREATE_LEADING_DIRS | ARCHIVE_PRESERVE_DATE;
+
+ bb_opt_complementaly = "c~tx:t~cx:x~ct:X*";
+ opt = bb_getopt_ulflags(argc, argv, tar_options,
+ NULL, /* T: arg is ignored by default
+ a list is an include list */
+ &(tar_handle->reject),
+ &base_dir, /* Change to dir <optarg> */
+ &tar_filename); /* archive filename */
+ /* Check one and only one context option was given */
+ if(opt & 0x80000000UL)
+ bb_show_usage();
+ ctx_flag = opt & (CTX_CREATE | CTX_TEST | CTX_EXTRACT);
+ if(ctx_flag & CTX_TEST) {
+ if ((tar_handle->action_header == header_list) ||
+ (tar_handle->action_header == header_verbose_list)) {
+ tar_handle->action_header = header_verbose_list;
+ } else {
+ tar_handle->action_header = header_list;
+ }
+ }
+ if(ctx_flag & CTX_EXTRACT) {
+ if (tar_handle->action_data != data_extract_to_stdout)
+ tar_handle->action_data = data_extract_all;
+ }
+ if(opt & TAR_OPT_2STDOUT) {
+ /* To stdout */
+ tar_handle->action_data = data_extract_to_stdout;
+ }
+ if(opt & TAR_OPT_VERBOSE) {
+ if ((tar_handle->action_header == header_list) ||
+ (tar_handle->action_header == header_verbose_list))
+ {
+ tar_handle->action_header = header_verbose_list;
+ } else {
+ tar_handle->action_header = header_list;
+ }
+ }
+#ifdef CONFIG_FEATURE_TAR_GZIP
+ if(opt & TAR_OPT_GZIP) {
+ get_header_ptr = get_header_tar_gz;
+ }
+#endif
+#ifdef CONFIG_FEATURE_TAR_BZIP2
+ if(opt & TAR_OPT_BZIP2) {
+ get_header_ptr = get_header_tar_bz2;
+ }
+#endif
+#ifdef CONFIG_FEATURE_TAR_EXCLUDE
+ if(opt & TAR_OPT_EXCLUDE) {
+ tar_handle->reject = append_file_list_to_list(tar_handle->reject);
+ }
#endif
+ /* Check if we are reading from stdin */
+ if ((argv[optind]) && (*argv[optind] == '-')) {
+ /* Default is to read from stdin, so just skip to next arg */
+ optind++;
+ }
+
+ /* Setup an array of filenames to work with */
+ /* TODO: This is the same as in ar, seperate function ? */
+ while (optind < argc) {
+ tar_handle->accept = llist_add_to(tar_handle->accept, argv[optind]);
+ optind++;
+ }
+
+ if ((tar_handle->accept) || (tar_handle->reject)) {
+ tar_handle->filter = filter_accept_reject_list;
+ }
+
+#ifdef CONFIG_FEATURE_TAR_CREATE
+ /* create an archive */
+ if (ctx_flag == CTX_CREATE) {
+ int verboseFlag = FALSE;
+ int gzipFlag = FALSE;
+
+# ifdef CONFIG_FEATURE_TAR_GZIP
+ if (get_header_ptr == get_header_tar_gz) {
+ gzipFlag = TRUE;
+ }
+# endif /* CONFIG_FEATURE_TAR_GZIP */
+# ifdef CONFIG_FEATURE_TAR_BZIP2
+ if (get_header_ptr == get_header_tar_bz2) {
+ bb_error_msg_and_die("Creating bzip2 compressed archives is not currently supported.");
+ }
+# endif /* CONFIG_FEATURE_TAR_BZIP2 */
+ if ((tar_handle->action_header == header_list) ||
+ (tar_handle->action_header == header_verbose_list)) {
+ verboseFlag = TRUE;
+ }
+ writeTarFile(tar_filename, verboseFlag, tar_handle->accept,
+ tar_handle->reject, gzipFlag);
+ } else
+#endif /* CONFIG_FEATURE_TAR_CREATE */
+ {
+ if ((tar_filename[0] == '-') && (tar_filename[1] == '\0')) {
+ tar_handle->src_fd = fileno(stdin);
+ tar_handle->seek = seek_by_char;
+ } else {
+ tar_handle->src_fd = bb_xopen(tar_filename, O_RDONLY);
+ }
+
+ if ((base_dir) && (chdir(base_dir))) {
+ bb_perror_msg_and_die("Couldnt chdir");
+ }
+
+ while (get_header_ptr(tar_handle) == EXIT_SUCCESS);
+
+ /* Ckeck that every file that should have been extracted was */
+ while (tar_handle->accept) {
+ if (find_list_entry(tar_handle->reject, tar_handle->accept->data) == NULL) {
+ if (find_list_entry(tar_handle->passed, tar_handle->accept->data) == NULL) {
+ bb_error_msg_and_die("%s: Not found in archive\n", tar_handle->accept->data);
+ }
+ }
+ tar_handle->accept = tar_handle->accept->link;
+ }
+ }
+
+#ifdef CONFIG_FEATURE_CLEAN_UP
+ if (tar_handle->src_fd != fileno(stdin)) {
+ close(tar_handle->src_fd);
+ }
+#endif /* CONFIG_FEATURE_CLEAN_UP */
+
+ return(EXIT_SUCCESS);
+}