diff options
Diffstat (limited to 'archival/libunarchive/get_header_ar.c')
| -rw-r--r-- | archival/libunarchive/get_header_ar.c | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/archival/libunarchive/get_header_ar.c b/archival/libunarchive/get_header_ar.c deleted file mode 100644 index 6bfc6bc..0000000 --- a/archival/libunarchive/get_header_ar.c +++ /dev/null @@ -1,133 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* Copyright 2001 Glenn McGrath. - * - * Licensed under GPLv2 or later, see file LICENSE in this source tree. - */ - -#include "libbb.h" -#include "unarchive.h" -#include "ar.h" - -static unsigned read_num(const char *str, int base) -{ - /* This code works because - * on misformatted numbers bb_strtou returns all-ones */ - int err = bb_strtou(str, NULL, base); - if (err == -1) - bb_error_msg_and_die("invalid ar header"); - return err; -} - -char FAST_FUNC get_header_ar(archive_handle_t *archive_handle) -{ - file_header_t *typed = archive_handle->file_header; - unsigned size; - union { - char raw[60]; - struct ar_header formatted; - } ar; -#if ENABLE_FEATURE_AR_LONG_FILENAMES - static char *ar_long_names; - static unsigned ar_long_name_size; -#endif - - /* dont use 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; - } - - /* ar header starts on an even byte (2 byte aligned) - * '\n' is used for padding - */ - 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] = xread_char(archive_handle->src_fd); - archive_handle->offset++; - } - archive_handle->offset += 60; - - if (ar.formatted.magic[0] != '`' || ar.formatted.magic[1] != '\n') - bb_error_msg_and_die("invalid ar header"); - - /* FIXME: more thorough routine would be in order here - * (we have something like that in tar) - * but for now we are lax. */ - ar.formatted.magic[0] = '\0'; /* else 4G-2 file will have size="4294967294`\n..." */ - typed->size = size = read_num(ar.formatted.size, 10); - - /* special filenames have '/' as the first character */ - if (ar.formatted.name[0] == '/') { - if (ar.formatted.name[1] == ' ') { - /* This is the index of symbols in the file for compilers */ - data_skip(archive_handle); - archive_handle->offset += size; - return get_header_ar(archive_handle); /* Return next header */ - } -#if ENABLE_FEATURE_AR_LONG_FILENAMES - if (ar.formatted.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 = size; - free(ar_long_names); - ar_long_names = xmalloc(size); - xread(archive_handle->src_fd, ar_long_names, size); - archive_handle->offset += size; - /* Return next header */ - return get_header_ar(archive_handle); - } -#else - bb_error_msg_and_die("long filenames not supported"); -#endif - } - /* Only size is always present, the rest may be missing in - * long filename pseudo file. Thus we decode the rest - * after dealing with long filename pseudo file. - */ - typed->mode = read_num(ar.formatted.mode, 8); - typed->mtime = read_num(ar.formatted.date, 10); - typed->uid = read_num(ar.formatted.uid, 10); - typed->gid = read_num(ar.formatted.gid, 10); - -#if ENABLE_FEATURE_AR_LONG_FILENAMES - if (ar.formatted.name[0] == '/') { - unsigned long_offset; - - /* The number after the '/' indicates the offset in the ar data section - * (saved in ar_long_names) that conatains the real filename */ - long_offset = read_num(&ar.formatted.name[1], 10); - if (long_offset >= ar_long_name_size) { - bb_error_msg_and_die("can't resolve long filename"); - } - typed->name = xstrdup(ar_long_names + long_offset); - } else -#endif - { - /* short filenames */ - typed->name = xstrndup(ar.formatted.name, 16); - } - - typed->name[strcspn(typed->name, " /")] = '\0'; - - if (archive_handle->filter(archive_handle) == EXIT_SUCCESS) { - archive_handle->action_header(typed); -#if ENABLE_DPKG || ENABLE_DPKG_DEB - if (archive_handle->dpkg__sub_archive) { - while (archive_handle->dpkg__action_data_subarchive(archive_handle->dpkg__sub_archive) == EXIT_SUCCESS) - continue; - } else -#endif - 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; -} |