| /* vi: set sw=4 ts=4: */ |
| /* |
| * Mini tar implementation for busybox |
| * |
| * Modified to use common extraction code used by ar, cpio, dpkg-deb, dpkg |
| * Glenn McGrath <bug1@iinet.net.au> |
| * |
| * Note, that as of BusyBox-0.43, tar has been completely rewritten from the |
| * ground up. It still has remnants of the old code lying about, but it is |
| * very different now (i.e., cleaner, less global variables, etc.) |
| * |
| * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.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 <fcntl.h> |
| #include <getopt.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 <sys/sysmacros.h> /* major() and minor() */ |
| #include "unarchive.h" |
| #include "busybox.h" |
| |
| #ifdef CONFIG_FEATURE_TAR_CREATE |
| |
| /* Tar file 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; |
| |
| /* 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) */ |
| }; |
| typedef struct TarHeader TarHeader; |
| |
| /* |
| ** 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 */ |
| 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 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)); |
| 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) |
| { |
| 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 inline HardLinkInfo *findHardLinkInfo(HardLinkInfo * hlInfo, struct stat *statbuf) |
| { |
| while (hlInfo) { |
| if ((statbuf->st_ino == hlInfo->ino) && (statbuf->st_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 inline 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) */ |
| 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)); |
| } 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 { |
| 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 |
| * 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 = |
| 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++) { |
| write(tbInfo->tarFd, "\0", 1); |
| } |
| /* Now do the verbose thing (or not) */ |
| |
| if (tbInfo->verboseFlag) { |
| FILE *vbFd = stdout; |
| |
| if (tbInfo->tarFd == STDOUT_FILENO) /* If the archive goes to stdout, verbose to stderr */ |
| vbFd = stderr; |
| |
| fprintf(vbFd, "%s\n", header.name); |
| } |
| |
| return (TRUE); |
| } |
| |
| # ifdef CONFIG_FEATURE_TAR_FROM |
| static inline int exclude_file(const llist_t *excluded_files, const char *file) |
| { |
| 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; |
| 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); |
| if (tbInfo->hlInfo == NULL) |
| addHardLinkInfo(&tbInfo->hlInfoHead, statbuf, fileName); |
| } |
| |
| /* It is against the rules to archive a socket */ |
| if (S_ISSOCK(statbuf->st_mode)) { |
| 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) { |
| 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) { |
| bb_error_msg("Removing leading '/' from member names"); |
| alreadyWarned = TRUE; |
| } |
| header_name++; |
| } |
| |
| if (strlen(fileName) >= NAME_SIZE) { |
| bb_error_msg(bb_msg_name_longer_than_foo, NAME_SIZE); |
| return (TRUE); |
| } |
| |
| if (header_name[0] == '\0') |
| return TRUE; |
| |
| # ifdef CONFIG_FEATURE_TAR_FROM |
| if (exclude_file(tbInfo->excludeList, header_name)) { |
| return SKIP; |
| } |
| # endif /* CONFIG_FEATURE_TAR_FROM */ |
| |
| 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; |
| ssize_t readSize = 0; |
| |
| /* open the file we want to archive, and make sure all is well */ |
| if ((inputFileFd = open(fileName, O_RDONLY)) < 0) { |
| bb_perror_msg("%s: Cannot open", fileName); |
| return (FALSE); |
| } |
| |
| /* write the file to the archive */ |
| readSize = bb_copyfd_eof(inputFileFd, tbInfo->tarFd); |
| |
| /* 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 inline int writeTarFile(const int tar_fd, const int verboseFlag, |
| const unsigned long dereferenceFlag, const llist_t *include, |
| const llist_t *exclude, const int gzip) |
| { |
| #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.hlInfoHead = NULL; |
| |
| fchmod(tar_fd, 0644); |
| tbInfo.tarFd = tar_fd; |
| tbInfo.verboseFlag = verboseFlag; |
| |
| /* Store the stat info for the tarball's file, so |
| * can avoid including the tarball into itself.... */ |
| if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0) |
| bb_perror_msg_and_die("Couldnt stat tar file"); |
| |
| #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 */ |
| |
| # 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 (include) { |
| if (!recursive_action(include->data, TRUE, dereferenceFlag, 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++) { |
| 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(tbInfo.tarFd); |
| if (errorFlag) |
| bb_error_msg("Error exit delayed from previous errors"); |
| |
| freeHardLinkInfo(&tbInfo.hlInfoHead); |
| |
| #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_FROM |
| 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 |
| |
| #ifdef CONFIG_FEATURE_TAR_COMPRESS |
| static char get_header_tar_Z(archive_handle_t *archive_handle) |
| { |
| /* Cant lseek over pipe's */ |
| archive_handle->seek = seek_by_char; |
| |
| /* do the decompression, and cleanup */ |
| if ((bb_xread_char(archive_handle->src_fd) != 0x1f) || (bb_xread_char(archive_handle->src_fd) != 0x9d)) { |
| bb_error_msg_and_die("Invalid magic"); |
| } |
| |
| archive_handle->src_fd = open_transformer(archive_handle->src_fd, uncompress); |
| archive_handle->offset = 0; |
| while (get_header_tar(archive_handle) == EXIT_SUCCESS); |
| |
| /* Can only do one file at a time */ |
| return(EXIT_FAILURE); |
| } |
| #endif |
| |
| #define CTX_TEST (1 << 0) |
| #define CTX_EXTRACT (1 << 1) |
| #define TAR_OPT_BASEDIR (1 << 2) |
| #define TAR_OPT_TARNAME (1 << 3) |
| #define TAR_OPT_2STDOUT (1 << 4) |
| #define TAR_OPT_P (1 << 5) |
| #define TAR_OPT_VERBOSE (1 << 6) |
| #define TAR_OPT_KEEP_OLD (1 << 7) |
| |
| #ifdef CONFIG_FEATURE_TAR_CREATE |
| # define CTX_CREATE (1 << 8) |
| # define TAR_OPT_DEREFERNCE (1 << 9) |
| # define TAR_OPT_STR_CREATE "ch" |
| # define TAR_OPT_FLAG_CREATE 2 |
| #else |
| //# define CTX_CREATE 0 |
| # define TAR_OPT_STR_CREATE "" |
| # define TAR_OPT_FLAG_CREATE 0 |
| #endif |
| |
| #ifdef CONFIG_FEATURE_TAR_BZIP2 |
| # define TAR_OPT_BZIP2 (1 << (8 + TAR_OPT_FLAG_CREATE)) |
| # define TAR_OPT_STR_BZIP2 "j" |
| # define TAR_OPT_FLAG_BZIP2 1 |
| #else |
| # define TAR_OPT_STR_BZIP2 "" |
| # define TAR_OPT_FLAG_BZIP2 0 |
| #endif |
| |
| #ifdef CONFIG_FEATURE_TAR_FROM |
| # define TAR_OPT_INCLUDE_FROM (1 << (8 + TAR_OPT_FLAG_CREATE + TAR_OPT_FLAG_BZIP2)) |
| # define TAR_OPT_EXCLUDE_FROM (1 << (8 + TAR_OPT_FLAG_CREATE + TAR_OPT_FLAG_BZIP2 + 1)) |
| # define TAR_OPT_STR_FROM "T:X:" |
| # define TAR_OPT_FLAG_FROM 2 |
| #else |
| # define TAR_OPT_STR_FROM "" |
| # define TAR_OPT_FLAG_FROM 0 |
| #endif |
| |
| #ifdef CONFIG_FEATURE_TAR_GZIP |
| # define TAR_OPT_GZIP (1 << (8 + TAR_OPT_FLAG_CREATE + TAR_OPT_FLAG_BZIP2 + TAR_OPT_FLAG_FROM)) |
| # define TAR_OPT_STR_GZIP "z" |
| # define TAR_OPT_FLAG_GZIP 1 |
| #else |
| # define TAR_OPT_STR_GZIP "" |
| # define TAR_OPT_FLAG_GZIP 0 |
| #endif |
| |
| #ifdef CONFIG_FEATURE_TAR_COMPRESS |
| # define TAR_OPT_UNCOMPRESS (1 << (8 + TAR_OPT_FLAG_CREATE + TAR_OPT_FLAG_BZIP2 + TAR_OPT_FLAG_FROM + TAR_OPT_FLAG_GZIP)) |
| # define TAR_OPT_STR_COMPRESS "Z" |
| #else |
| # define TAR_OPT_STR_COMPRESS "" |
| #endif |
| |
| static const char tar_options[]="txC:f:Opvk" \ |
| TAR_OPT_STR_CREATE \ |
| TAR_OPT_STR_BZIP2 \ |
| TAR_OPT_STR_FROM \ |
| TAR_OPT_STR_GZIP \ |
| TAR_OPT_STR_COMPRESS; |
| |
| #ifdef CONFIG_FEATURE_TAR_LONG_OPTIONS |
| static const struct option tar_long_options[] = { |
| { "list", 0, NULL, 't' }, |
| { "extract", 0, NULL, 'x' }, |
| { "directory", 1, NULL, 'C' }, |
| { "file", 1, NULL, 'f' }, |
| { "to-stdout", 0, NULL, 'O' }, |
| { "same-permissions", 0, NULL, 'p' }, |
| { "verbose", 0, NULL, 'v' }, |
| { "keep-old", 0, NULL, 'k' }, |
| # ifdef CONFIG_FEATURE_TAR_CREATE |
| { "create", 0, NULL, 'c' }, |
| { "dereference", 0, NULL, 'h' }, |
| # endif |
| # ifdef CONFIG_FEATURE_TAR_BZIP2 |
| { "bzip2", 0, NULL, 'j' }, |
| # endif |
| # ifdef CONFIG_FEATURE_TAR_FROM |
| { "files-from", 1, NULL, 'T' }, |
| { "exclude-from", 1, NULL, 'X' }, |
| # endif |
| # ifdef CONFIG_FEATURE_TAR_GZIP |
| { "gzip", 0, NULL, 'z' }, |
| # endif |
| # ifdef CONFIG_FEATURE_TAR_COMPRESS |
| { "compress", 0, NULL, 'Z' }, |
| # endif |
| { 0, 0, 0, 0 } |
| }; |
| #endif |
| |
| int tar_main(int argc, char **argv) |
| { |
| char (*get_header_ptr)(archive_handle_t *) = get_header_tar; |
| archive_handle_t *tar_handle; |
| char *base_dir = NULL; |
| const char *tar_filename = "-"; |
| unsigned long opt; |
| unsigned long 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 | ARCHIVE_EXTRACT_UNCONDITIONAL; |
| |
| bb_opt_complementaly = "c~tx:t~cx:x~ct:X*:T*"; |
| #ifdef CONFIG_FEATURE_TAR_LONG_OPTIONS |
| bb_applet_long_options = tar_long_options; |
| #endif |
| |
| opt = bb_getopt_ulflags(argc, argv, tar_options, |
| &base_dir, /* Change to dir <optarg> */ |
| &tar_filename /* archive filename */ |
| #ifdef CONFIG_FEATURE_TAR_FROM |
| , &(tar_handle->accept), |
| &(tar_handle->reject) |
| #endif |
| ); |
| |
| /* Check one and only one context option was given */ |
| if(opt & 0x80000000UL) { |
| bb_show_usage(); |
| } |
| #ifdef CONFIG_FEATURE_TAR_CREATE |
| ctx_flag = opt & (CTX_CREATE | CTX_TEST | CTX_EXTRACT); |
| #else |
| ctx_flag = opt & (CTX_TEST | CTX_EXTRACT); |
| #endif |
| if (ctx_flag == 0) { |
| bb_show_usage(); |
| } |
| 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; |
| } |
| } |
| if (opt & TAR_OPT_KEEP_OLD) { |
| tar_handle->flags &= ~ARCHIVE_EXTRACT_UNCONDITIONAL; |
| } |
| |
| #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_COMPRESS |
| if(opt & TAR_OPT_UNCOMPRESS) { |
| get_header_ptr = get_header_tar_Z; |
| } |
| #endif |
| #ifdef CONFIG_FEATURE_TAR_FROM |
| if(opt & TAR_OPT_EXCLUDE_FROM) { |
| tar_handle->reject = append_file_list_to_list(tar_handle->reject); |
| } |
| if(opt & TAR_OPT_INCLUDE_FROM) { |
| tar_handle->accept = append_file_list_to_list(tar_handle->accept); |
| } |
| #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, separate function ? */ |
| while (optind < argc) { |
| char *filename_ptr = last_char_is(argv[optind], '/'); |
| if (filename_ptr) { |
| *filename_ptr = '\0'; |
| } |
| 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; |
| } |
| |
| /* Open the tar file */ |
| { |
| FILE *tar_stream; |
| int flags; |
| |
| #ifdef CONFIG_FEATURE_TAR_CREATE |
| if (opt & CTX_CREATE) { |
| /* Make sure there is at least one file to tar up. */ |
| if (tar_handle->accept == NULL) { |
| bb_error_msg_and_die("Cowardly refusing to create an empty archive"); |
| } |
| tar_stream = stdout; |
| flags = O_WRONLY | O_CREAT | O_EXCL; |
| unlink(tar_filename); |
| } else |
| #endif |
| { |
| tar_stream = stdin; |
| flags = O_RDONLY; |
| } |
| |
| if ((tar_filename[0] == '-') && (tar_filename[1] == '\0')) { |
| tar_handle->src_fd = fileno(tar_stream); |
| tar_handle->seek = seek_by_char; |
| } else { |
| tar_handle->src_fd = bb_xopen(tar_filename, flags); |
| } |
| } |
| |
| if ((base_dir) && (chdir(base_dir))) { |
| bb_perror_msg_and_die("Couldnt chdir to %s", base_dir); |
| } |
| |
| #ifdef CONFIG_FEATURE_TAR_CREATE |
| /* create an archive */ |
| if (opt & 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_handle->src_fd, verboseFlag, opt & TAR_OPT_DEREFERNCE, tar_handle->accept, |
| tar_handle->reject, gzipFlag); |
| } else |
| #endif /* CONFIG_FEATURE_TAR_CREATE */ |
| { |
| 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 != STDIN_FILENO) { |
| close(tar_handle->src_fd); |
| } |
| #endif /* CONFIG_FEATURE_CLEAN_UP */ |
| |
| return(EXIT_SUCCESS); |
| } |