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); }
extern char get_header_ar(archive_handle_t *archive_handle) { file_header_t *typed = archive_handle->file_header; union { char raw[60]; struct { char name[16]; char date[12]; char uid[6]; char gid[6]; char mode[8]; char size[10]; char magic[2]; } formated; } ar; #ifdef CONFIG_FEATURE_AR_LONG_FILENAMES static char *ar_long_names; static unsigned int ar_long_name_size; #endif /* dont use bb_xread as we want to handle the error ourself */ if (read(archive_handle->src_fd, ar.raw, 60) != 60) { /* End Of File */ return(EXIT_FAILURE); } /* Some ar entries have a trailing '\n' after the previous data entry */ if (ar.raw[0] == '\n') { /* fix up the header, we started reading 1 byte too early */ memmove(ar.raw, &ar.raw[1], 59); ar.raw[59] = bb_xread_char(archive_handle->src_fd); archive_handle->offset++; } archive_handle->offset += 60; /* align the headers based on the header magic */ if ((ar.formated.magic[0] != '`') || (ar.formated.magic[1] != '\n')) { bb_error_msg_and_die("Invalid ar header"); } typed->mode = strtol(ar.formated.mode, NULL, 8); typed->mtime = atoi(ar.formated.date); typed->uid = atoi(ar.formated.uid); typed->gid = atoi(ar.formated.gid); typed->size = atoi(ar.formated.size); /* long filenames have '/' as the first character */ if (ar.formated.name[0] == '/') { #ifdef CONFIG_FEATURE_AR_LONG_FILENAMES if (ar.formated.name[1] == '/') { /* If the second char is a '/' then this entries data section * stores long filename for multiple entries, they are stored * in static variable long_names for use in future entries */ ar_long_name_size = typed->size; ar_long_names = xmalloc(ar_long_name_size); bb_xread_all(archive_handle->src_fd, ar_long_names, ar_long_name_size); archive_handle->offset += ar_long_name_size; /* This ar entries data section only contained filenames for other records * they are stored in the static ar_long_names for future reference */ return (get_header_ar(archive_handle)); /* Return next header */ } else if (ar.formated.name[1] == ' ') { /* This is the index of symbols in the file for compilers */ data_skip(archive_handle); archive_handle->offset += typed->size; return (get_header_ar(archive_handle)); /* Return next header */ } else { /* The number after the '/' indicates the offset in the ar data section (saved in variable long_name) that conatains the real filename */ const unsigned int long_offset = atoi(&ar.formated.name[1]); if (long_offset >= ar_long_name_size) { bb_error_msg_and_die("Cant resolve long filename"); } typed->name = bb_xstrdup(ar_long_names + long_offset); } #else bb_error_msg_and_die("long filenames not supported"); #endif } else { /* short filenames */ typed->name = bb_xstrndup(ar.formated.name, 16); } typed->name[strcspn(typed->name, " /")] = '\0'; if (archive_handle->filter(archive_handle) == EXIT_SUCCESS) { archive_handle->action_header(typed); if (archive_handle->sub_archive) { while (archive_handle->action_data_subarchive(archive_handle->sub_archive) == EXIT_SUCCESS); } else { archive_handle->action_data(archive_handle); } } else { data_skip(archive_handle); } archive_handle->offset += typed->size; /* Set the file pointer to the correct spot, we may have been reading a compressed file */ lseek(archive_handle->src_fd, archive_handle->offset, SEEK_SET); return(EXIT_SUCCESS); }
int gunzip_main(int argc, char **argv) { char status = EXIT_SUCCESS; unsigned long opt; opt = bb_getopt_ulflags(argc, argv, "cftd"); /* if called as zcat */ if (strcmp(bb_applet_name, "zcat") == 0) { opt |= GUNZIP_OPT_STDOUT; } do { struct stat stat_buf; const char *old_path = argv[optind]; const char *delete_path = NULL; char *new_path = NULL; int src_fd; int dst_fd; optind++; if (old_path == NULL || strcmp(old_path, "-") == 0) { src_fd = STDIN_FILENO; opt |= GUNZIP_OPT_STDOUT; } else { src_fd = bb_xopen(old_path, O_RDONLY); /* Get the time stamp on the input file. */ xstat(old_path, &stat_buf); } /* Check that the input is sane. */ if (isatty(src_fd) && ((opt & GUNZIP_OPT_FORCE) == 0)) { bb_error_msg_and_die ("compressed data not read from terminal. Use -f to force it."); } /* Set output filename and number */ if (opt & GUNZIP_OPT_TEST) { dst_fd = bb_xopen(bb_dev_null, O_WRONLY); /* why does test use filenum 2 ? */ } else if (opt & GUNZIP_OPT_STDOUT) { dst_fd = STDOUT_FILENO; } else { char *extension; new_path = bb_xstrdup(old_path); extension = strrchr(new_path, '.'); #ifdef CONFIG_FEATURE_GUNZIP_UNCOMPRESS if (extension && (strcmp(extension, ".Z") == 0)) { *extension = '\0'; } else #endif if (extension && (strcmp(extension, ".gz") == 0)) { *extension = '\0'; } else if (extension && (strcmp(extension, ".tgz") == 0)) { extension[2] = 'a'; extension[3] = 'r'; } else { bb_error_msg_and_die("Invalid extension"); } /* Open output file (with correct permissions) */ dst_fd = bb_xopen3(new_path, O_WRONLY | O_CREAT, stat_buf.st_mode); /* If unzip succeeds remove the old file */ delete_path = old_path; } /* do the decompression, and cleanup */ if (bb_xread_char(src_fd) == 0x1f) { unsigned char magic2; magic2 = bb_xread_char(src_fd); #ifdef CONFIG_FEATURE_GUNZIP_UNCOMPRESS if (magic2 == 0x9d) { status = uncompress(src_fd, dst_fd); } else #endif if (magic2 == 0x8b) { check_header_gzip(src_fd); status = inflate_gunzip(src_fd, dst_fd); if (status != 0) { bb_error_msg_and_die("Error inflating"); } } else { bb_error_msg_and_die("Invalid magic"); } } else { bb_error_msg_and_die("Invalid magic"); } if ((status != EXIT_SUCCESS) && (new_path)) { /* Unzip failed, remove new path instead of old path */ delete_path = new_path; } if (dst_fd != STDOUT_FILENO) { close(dst_fd); } if (src_fd != STDIN_FILENO) { close(src_fd); } /* delete_path will be NULL if in test mode or from stdin */ if (delete_path && (unlink(delete_path) == -1)) { bb_error_msg_and_die("Couldn't remove %s", delete_path); } free(new_path); } while (optind < argc); return status; }