X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=archival%2Far.c;h=983b5ae2cd8ef965fdb5af7f27737b369b0a3043;hb=999af20d3e025741197b8aebea9aeb4e435c9ebf;hp=d82763df18a89666df8c42b1a83401d7b5133fd0;hpb=fca8050f0fd224a22136b74fce23b700f1d07ccf;p=oweals%2Fbusybox.git diff --git a/archival/ar.c b/archival/ar.c index d82763df1..983b5ae2c 100644 --- a/archival/ar.c +++ b/archival/ar.c @@ -1,10 +1,10 @@ /* vi: set sw=4 ts=4: */ /* - * Mini ar implementation for busybox + * Mini ar implementation for busybox * * Copyright (C) 2000 by Glenn McGrath - * Written by Glenn McGrath 1 June 2000 - * + * Written by Glenn McGrath 1 June 2000 + * * Based in part on BusyBox tar, Debian dpkg-deb and GNU ar. * * This program is free software; you can redistribute it and/or modify @@ -21,374 +21,92 @@ * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * - * Last modified 9 September 2000 + * There is no single standard to adhere to so ar may not portable + * between different systems + * http://www.unix-systems.org/single_unix_specification_v2/xcu/ar.html */ + +#include #include +#include #include -#include -#include -#include #include #include #include -#include -#include -#include -#include -#include "internal.h" - -#define BLOCK_SIZE 60 -#define PRESERVE_DATE 1 /* preserve original dates */ -#define VERBOSE 2 /* be verbose */ -#define DISPLAY 4 /* display contents */ -#define EXT_TO_FILE 8 /* extract contents of archive */ -#define EXT_TO_STDOUT 16 /* extract to stdout */ -#define RECURSIVE 32 - -#define MAX_NAME_LENGTH 100 - -//#define BB_DECLARE_EXTERN -//#define bb_need_io_error -//#include "messages.c" - -//#define BB_AR_EXPERIMENTAL_UNTAR - -#if defined BB_AR_EXPERIMENTAL_UNTAR -typedef struct rawTarHeader { - char name[100]; /* 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[100]; /* 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 */ -} rawTarHeader_t; -#endif - -typedef struct rawArHeader { /* Byte Offset */ - char name[16]; /* 0-15 */ - char date[12]; /* 16-27 */ - char uid[6], gid[6]; /* 28-39 */ - char mode[8]; /* 40-47 */ - char size[10]; /* 48-57 */ - char fmag[2]; /* 58-59 */ -} rawArHeader_t; - -typedef struct headerL { - char name[MAX_NAME_LENGTH]; - size_t size; - uid_t uid; - gid_t gid; - mode_t mode; - time_t mtime; - off_t offset; - struct headerL *next; -} headerL_t; - -#if defined BB_AR_EXPERIMENTAL_UNTAR -/* - * identify Tar header (magic field) and reset srcFd to entry position - */ -static int checkTarMagic(int srcFd) -{ - off_t headerStart; - char magic[6]; - - headerStart = lseek(srcFd, 0, SEEK_CUR); - lseek(srcFd, (off_t) 257, SEEK_CUR); - fullRead(srcFd, magic, 6); - lseek(srcFd, headerStart, SEEK_SET); - if (strncmp(magic, "ustar", 5)!=0) - return(FALSE); - return(TRUE); -} +#include "unarchive.h" +#include "busybox.h" -static int readTarHeader(int srcFd, headerL_t *current) +static void header_verbose_list_ar(const file_header_t *file_header) { - rawTarHeader_t rawTarHeader; - unsigned char *temp = (unsigned char *) &rawTarHeader; - long sum = 0; - int i; - off_t initialOffset; - - initialOffset = lseek(srcFd, 0, SEEK_CUR); - if (fullRead(srcFd, (char *) &rawTarHeader, 512) != 512) { - lseek(srcFd, initialOffset, SEEK_SET); - return(FALSE); - } - for (i = 0; i < 148 ; i++) - sum += temp[i]; - sum += ' ' * 8; - for (i = 156; i < 512 ; i++) - sum += temp[i]; - if (sum!= strtol(rawTarHeader.chksum, NULL, 8)) - return(FALSE); - sscanf(rawTarHeader.name, "%s", current->name); - current->size = strtol(rawTarHeader.size, NULL, 8); - current->uid = strtol(rawTarHeader.uid, NULL, 8); - current->gid = strtol(rawTarHeader.gid, NULL, 8); - current->mode = strtol(rawTarHeader.mode, NULL, 8); - current->mtime = strtol(rawTarHeader.mtime, NULL, 8); - current->offset = lseek(srcFd, 0 , SEEK_CUR); - - current->next = (headerL_t *) xmalloc(sizeof(headerL_t)); - current = current->next; - return(TRUE); + const char *mode = bb_mode_string(file_header->mode); + char *mtime; + + mtime = ctime(&file_header->mtime); + mtime[16] = ' '; + memmove(&mtime[17], &mtime[20], 4); + mtime[21] = '\0'; + printf("%s %d/%d%7d %s %s\n", &mode[1], file_header->uid, file_header->gid, (int) file_header->size, &mtime[4], file_header->name); } -#endif -/* - * identify Ar header (magic) and reset srcFd to entry position - */ -static int checkArMagic(int srcFd) -{ - off_t headerStart; - char arMagic[8]; - - headerStart = lseek(srcFd, 0, SEEK_CUR); - if (fullRead(srcFd, arMagic, 8) != 8) { - printf("fatal error/n"); - return (FALSE); - } - lseek(srcFd, headerStart, SEEK_SET); - - if (strncmp(arMagic,"!",7) != 0) - return(FALSE); - return(TRUE); -} +#define AR_CTX_PRINT 0x01 +#define AR_CTX_LIST 0x02 +#define AR_CTX_EXTRACT 0x04 +#define AR_OPT_PRESERVE_DATE 0x08 +#define AR_OPT_VERBOSE 0x10 +#define AR_OPT_CREATE 0x20 +#define AR_OPT_INSERT 0x40 -/* - * get, check and correct the converted header - */ -static int readArEntry(int srcFd, headerL_t *entry) +extern int ar_main(int argc, char **argv) { - size_t nameLength; - rawArHeader_t rawArHeader; - off_t initialOffset; - - initialOffset = lseek(srcFd, 0, SEEK_CUR); - if (fullRead(srcFd, (char *) &rawArHeader, 60) != 60) { - lseek(srcFd, initialOffset, SEEK_SET); - return(FALSE); - } - if ((rawArHeader.fmag[0]!='`') || (rawArHeader.fmag[1]!='\n')) { - lseek(srcFd, initialOffset, SEEK_SET); - return(FALSE); - } + archive_handle_t *archive_handle; + unsigned long opt; + static const char msg_unsupported_err[] = + "Archive %s not supported. Install binutils 'ar'."; + char magic[8]; - strncpy(entry->name, rawArHeader.name, 16); - nameLength=strcspn(entry->name, " \\"); - entry->name[nameLength]='\0'; - parse_mode(rawArHeader.mode, &entry->mode); - entry->mtime = atoi(rawArHeader.date); - entry->uid = atoi(rawArHeader.uid); - entry->gid = atoi(rawArHeader.gid); - entry->size = (size_t) atoi(rawArHeader.size); - entry->offset = initialOffset + (off_t) 60; - - nameLength = strcspn(entry->name, "/"); - - /* handle GNU style short filenames, strip trailing '/' */ - if (nameLength > 0) - entry->name[nameLength]='\0'; + archive_handle = init_handle(); - /* handle GNU style long filenames */ - if (nameLength == 0) { - /* escape from recursive call */ - if (entry->name[1]=='0') - return(TRUE); + /* Prepend '-' to the first argument if required */ + bb_opt_complementally = "--:p:t:x:-1:?:p--tx:t--px:x--pt"; + opt = bb_getopt_ulflags(argc, argv, "ptxovcr"); - /* the data section contains the real filename */ - if (entry->name[1]=='/') { - char tempName[MAX_NAME_LENGTH]; - - if (entry->size > MAX_NAME_LENGTH) - entry->size = MAX_NAME_LENGTH; - fullRead(srcFd, tempName, entry->size); - tempName[entry->size-3]='\0'; - - /* read the second header for this entry */ - /* be carefull, this is recursive */ - if (readArEntry(srcFd, entry)==FALSE) - return(FALSE); - - if ((entry->name[0]='/') && (entry->name[1]='0')) - strcpy(entry->name, tempName); - else { - errorMsg("Invalid long filename\n"); - return(FALSE); - } - } + if (opt & AR_CTX_PRINT) { + archive_handle->action_data = data_extract_to_stdout; } - return(TRUE); -} - -/* - * return the headerL_t struct for the specified filename - */ -static headerL_t *getHeaders(int srcFd, headerL_t *head, int funct) -{ -#if defined BB_AR_EXPERIMENTAL_UNTAR - int tar=FALSE; -#endif - int ar=FALSE; - headerL_t *list; - off_t initialOffset; - - list = (headerL_t *) malloc(sizeof(headerL_t)); - initialOffset=lseek(srcFd, 0, SEEK_CUR); - if (checkArMagic(srcFd)==TRUE) - ar=TRUE; - -#if defined BB_AR_EXPERIMENTAL_UNTAR - if (checkTarMagic(srcFd)==TRUE) - tar=TRUE; - - if (tar==TRUE) { - while(readTarHeader(srcFd, list)==TRUE) { - off_t tarOffset; - list->next = (headerL_t *) malloc(sizeof(headerL_t)); - *list->next = *head; - *head = *list; - - /* recursive check for sub-archives */ - if ((funct & RECURSIVE) == RECURSIVE) - head = getHeaders(srcFd, head, funct); - tarOffset = (off_t) head->size/512; - if ( head->size % 512 > 0) - tarOffset++; - tarOffset=tarOffset*512; - lseek(srcFd, head->offset + tarOffset, SEEK_SET); - } - } -#endif - - if (ar==TRUE) { - lseek(srcFd, 8, SEEK_CUR); - while(1) { - if (readArEntry(srcFd, list) == FALSE) { - lseek(srcFd, ++initialOffset, SEEK_CUR); - if (readArEntry(srcFd, list) == FALSE) - return(head); - } - list->next = (headerL_t *) malloc(sizeof(headerL_t)); - *list->next = *head; - *head = *list; - /* recursive check for sub-archives */ - if (funct & RECURSIVE) - head = getHeaders(srcFd, head, funct); - lseek(srcFd, head->offset + head->size, SEEK_SET); - } + if (opt & AR_CTX_LIST) { + archive_handle->action_header = header_list; } - return(head); -} - -/* - * find an entry in the linked list matching the filename - */ -static headerL_t *findEntry(headerL_t *head, const char *filename) -{ - while(head->next != NULL) { - if (strcmp(filename, head->name)==0) - return(head); - head=head->next; + if (opt & AR_CTX_EXTRACT) { + archive_handle->action_data = data_extract_all; + } + if (opt & AR_OPT_PRESERVE_DATE) { + archive_handle->flags |= ARCHIVE_PRESERVE_DATE; + } + if (opt & AR_OPT_VERBOSE) { + archive_handle->action_header = header_verbose_list_ar; + } + if (opt & AR_OPT_CREATE) { + bb_error_msg_and_die(msg_unsupported_err, "creation"); + } + if (opt & AR_OPT_INSERT) { + bb_error_msg_and_die(msg_unsupported_err, "insertion"); } - return(NULL); -} -extern int ar_main(int argc, char **argv) -{ - int funct = 0, opt=0; - int srcFd=0, dstFd=0; - headerL_t *header, *entry, *extractList; + archive_handle->src_fd = bb_xopen(argv[optind++], O_RDONLY); - while ((opt = getopt(argc, argv, "ovtpxR")) != -1) { - switch (opt) { - case 'o': - funct |= PRESERVE_DATE; - break; - case 'v': - funct |= VERBOSE; - break; - case 't': - funct |= DISPLAY; - break; - case 'x': - funct |= EXT_TO_FILE; - break; - case 'p': - funct |= EXT_TO_STDOUT; - break; - case 'R': - funct |= RECURSIVE; - break; - default: - usage(ar_usage); - } + while (optind < argc) { + archive_handle->filter = filter_accept_list; + archive_handle->accept = llist_add_to(archive_handle->accept, argv[optind++]); } - - /* check the src filename was specified */ - if (optind == argc) { - usage(ar_usage); - return(FALSE); - } - - if ( (srcFd = open(argv[optind], O_RDONLY)) < 0) { - errorMsg("Cannot read %s\n", optarg); - return (FALSE); - } - optind++; - entry = (headerL_t *) malloc(sizeof(headerL_t)); - header = (headerL_t *) malloc(sizeof(headerL_t)); - extractList = (headerL_t *) malloc(sizeof(headerL_t)); - header = getHeaders(srcFd, header, funct); - /* find files to extract or display */ - if (optindnext = (headerL_t *) malloc(sizeof(headerL_t)); - *entry->next = *extractList; - *extractList = *entry; - } - optind++; - } + archive_xread_all(archive_handle, magic, 7); + if (strncmp(magic, "!", 7) != 0) { + bb_error_msg_and_die("Invalid ar magic"); } - else - extractList = header; - - while(extractList->next != NULL) { - if (funct & EXT_TO_FILE) { - if (isDirectory(extractList->name, TRUE, NULL)==FALSE) - createPath(extractList->name, 0666); - dstFd = open(extractList->name, O_WRONLY | O_CREAT, extractList->mode); - lseek(srcFd, extractList->offset, SEEK_SET); - copySubFile(srcFd, dstFd, (size_t) extractList->size); - } - if (funct & EXT_TO_STDOUT) { - lseek(srcFd, extractList->offset, SEEK_SET); - copySubFile(srcFd, fileno(stdout), (size_t) extractList->size); - } - if ( (funct & DISPLAY) || (funct & VERBOSE)) { - if (funct & VERBOSE) - printf("%s %d/%d %8d %s ", modeString(extractList->mode), - extractList->uid, extractList->gid, - extractList->size, timeString(extractList->mtime)); - printf("%s\n", extractList->name); - } - extractList=extractList->next; - } - return (TRUE); + archive_handle->offset += 7; + + while (get_header_ar(archive_handle) == EXIT_SUCCESS); + + return EXIT_SUCCESS; }