| /* vi: set sw=4 ts=4: */ |
| /* |
| * 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.) |
| * |
| * 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 <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 "busybox.h" |
| |
| #ifdef BB_FEATURE_TAR_CREATE |
| |
| /* Tar file constants */ |
| # define TAR_MAGIC "ustar" /* ustar and a null */ |
| # define TAR_VERSION " " /* Be compatable with GNU tar format */ |
| |
| # ifndef MAJOR |
| # define MAJOR(dev) (((dev)>>8)&0xff) |
| # define MINOR(dev) ((dev)&0xff) |
| # endif |
| |
| 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 */ |
| 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; |
| |
| /* 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) |
| { |
| /* 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 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 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 //BB_FEATURE_TAR_EXCLUDE |
| |
| 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 //tar_create |
| |
| void append_file_to_list(const char *new_name, char ***list, int *list_count) |
| { |
| *list = realloc(*list, sizeof(char *) * (*list_count + 2)); |
| (*list)[*list_count] = xstrdup(new_name); |
| (*list_count)++; |
| (*list)[*list_count] = NULL; |
| } |
| |
| void append_file_list_to_list(char *filename, char ***name_list, int *num_of_entries) |
| { |
| FILE *src_stream; |
| char *line; |
| char *line_ptr; |
| |
| src_stream = xfopen(filename, "r"); |
| while ((line = get_line_from_file(src_stream)) != NULL) { |
| line_ptr = last_char_is(line, '\n'); |
| if (line_ptr) { |
| *line_ptr = '\0'; |
| } |
| append_file_to_list(line, name_list, num_of_entries); |
| free(line); |
| } |
| fclose(src_stream); |
| } |
| |
| #ifdef BB_FEATURE_TAR_EXCLUDE |
| /* |
| * Create a list of names that are in the include list AND NOT in the exclude lists |
| */ |
| char **list_and_not_list(char **include_list, char **exclude_list) |
| { |
| char **new_include_list = NULL; |
| int new_include_count = 0; |
| int include_count = 0; |
| int exclude_count; |
| |
| if (include_list == NULL) { |
| return(NULL); |
| } |
| |
| while (include_list[include_count] != NULL) { |
| int found = FALSE; |
| exclude_count = 0; |
| while (exclude_list[exclude_count] != NULL) { |
| if (strcmp(include_list[include_count], exclude_list[exclude_count]) == 0) { |
| found = TRUE; |
| break; |
| } |
| exclude_count++; |
| } |
| |
| if (found == FALSE) { |
| new_include_list = realloc(new_include_list, sizeof(char *) * (include_count + 2)); |
| new_include_list[new_include_count] = include_list[include_count]; |
| new_include_count++; |
| } else { |
| free(include_list[include_count]); |
| } |
| include_count++; |
| } |
| new_include_list[new_include_count] = NULL; |
| return(new_include_list); |
| } |
| #endif |
| |
| int tar_main(int argc, char **argv) |
| { |
| enum untar_funct_e { |
| /* These are optional */ |
| untar_from_file = 1, |
| untar_from_stdin = 2, |
| untar_unzip = 4, |
| /* Require one and only one of these */ |
| untar_list = 8, |
| untar_create = 16, |
| untar_extract = 32 |
| }; |
| |
| FILE *src_stream = NULL; |
| FILE *uncompressed_stream = NULL; |
| char **include_list = NULL; |
| char **exclude_list = NULL; |
| char *src_filename = NULL; |
| char *dst_prefix = NULL; |
| char *file_list_name = NULL; |
| int opt; |
| unsigned short untar_funct = 0; |
| unsigned short untar_funct_required = 0; |
| unsigned short extract_function = 0; |
| int include_list_count = 0; |
| int exclude_list_count = 0; |
| int gunzip_pid; |
| int gz_fd = 0; |
| |
| if (argc < 2) { |
| show_usage(); |
| } |
| |
| /* Prepend '-' to the first argument if required */ |
| if (argv[1][0] != '-') { |
| char *tmp = xmalloc(strlen(argv[1]) + 2); |
| tmp[0] = '-'; |
| strcpy(tmp + 1, argv[1]); |
| argv[1] = tmp; |
| } |
| |
| while ((opt = getopt(argc, argv, "ctxT:X:C:f:Opvz")) != -1) { |
| switch (opt) { |
| |
| /* One and only one of these is required */ |
| case 'c': |
| untar_funct_required |= untar_create; |
| break; |
| case 't': |
| untar_funct_required |= untar_list; |
| extract_function |= extract_list |extract_unconditional; |
| break; |
| case 'x': |
| untar_funct_required |= untar_extract; |
| extract_function |= (extract_all_to_fs | extract_unconditional | extract_create_leading_dirs); |
| break; |
| |
| /* These are optional */ |
| /* Exclude or Include files listed in <filename>*/ |
| #ifdef BB_FEATURE_TAR_EXCLUDE |
| case 'X': |
| append_file_list_to_list(optarg, &exclude_list, &exclude_list_count); |
| break; |
| #endif |
| case 'T': |
| // by default a list is an include list |
| append_file_list_to_list(optarg, &include_list, &include_list_count); |
| break; |
| |
| case 'C': // Change to dir <optarg> |
| /* Make sure dst_prefix ends in a '/' */ |
| dst_prefix = concat_path_file(optarg, "/"); |
| break; |
| case 'f': // archive filename |
| if (strcmp(optarg, "-") == 0) { |
| // Untar from stdin to stdout |
| untar_funct |= untar_from_stdin; |
| } else { |
| untar_funct |= untar_from_file; |
| src_filename = xstrdup(optarg); |
| } |
| break; |
| case 'O': |
| extract_function |= extract_to_stdout; |
| break; |
| case 'p': |
| break; |
| case 'v': |
| if (extract_function & extract_list) { |
| extract_function |= extract_verbose_list; |
| } |
| extract_function |= extract_list; |
| break; |
| #ifdef BB_FEATURE_TAR_GZIP |
| case 'z': |
| untar_funct |= untar_unzip; |
| break; |
| #endif |
| default: |
| show_usage(); |
| } |
| } |
| |
| /* Make sure the valid arguments were passed */ |
| if (untar_funct_required == 0) { |
| error_msg_and_die("You must specify one of the `-ctx' options"); |
| } |
| if ((untar_funct_required != untar_create) && |
| (untar_funct_required != untar_extract) && |
| (untar_funct_required != untar_list)) { |
| error_msg_and_die("You may not specify more than one `ctx' option."); |
| } |
| untar_funct |= untar_funct_required; |
| |
| /* Setup an array of filenames to work with */ |
| while (optind < argc) { |
| append_file_to_list(argv[optind], &include_list, &include_list_count); |
| optind++; |
| } |
| |
| if (extract_function & (extract_list | extract_all_to_fs)) { |
| if (dst_prefix == NULL) { |
| dst_prefix = xstrdup("./"); |
| } |
| |
| /* Setup the source of the tar data */ |
| if (untar_funct & untar_from_file) { |
| src_stream = xfopen(src_filename, "r"); |
| } else { |
| src_stream = stdin; |
| } |
| #ifdef BB_FEATURE_TAR_GZIP |
| /* Get a binary tree of all the tar file headers */ |
| if (untar_funct & untar_unzip) { |
| uncompressed_stream = gz_open(src_stream, &gunzip_pid); |
| } else |
| #endif // BB_FEATURE_TAR_GZIP |
| uncompressed_stream = src_stream; |
| |
| /* extract or list archive */ |
| unarchive(uncompressed_stream, stdout, &get_header_tar, extract_function, dst_prefix, include_list, exclude_list); |
| fclose(uncompressed_stream); |
| } |
| #ifdef BB_FEATURE_TAR_CREATE |
| /* create an archive */ |
| else if (untar_funct & untar_create) { |
| int verboseFlag = FALSE; |
| |
| #ifdef BB_FEATURE_TAR_GZIP |
| if (untar_funct && untar_unzip) { |
| error_msg_and_die("Creation of compressed tarfile not internally support by tar, pipe to busybox gunzip"); |
| } |
| #endif // BB_FEATURE_TAR_GZIP |
| if (extract_function & extract_verbose_list) { |
| verboseFlag = TRUE; |
| } |
| writeTarFile(src_filename, verboseFlag, &argv[argc - 1], include_list); |
| } |
| #endif // BB_FEATURE_TAR_CREATE |
| |
| /* Cleanups */ |
| #ifdef BB_FEATURE_TAR_GZIP |
| if (untar_funct & untar_unzip) { |
| fclose(src_stream); |
| close(gz_fd); |
| gz_close(gunzip_pid); |
| } |
| #endif // BB_FEATURE_TAR_GZIP |
| if (src_filename) { |
| free(src_filename); |
| } |
| if (file_list_name) { |
| free(file_list_name); |
| } |
| return(EXIT_SUCCESS); |
| } |