PUT_OCTAL(header.uid, statbuf->st_uid);
PUT_OCTAL(header.gid, statbuf->st_gid);
memset(header.size, '0', sizeof(header.size)-1); /* Regular file size is handled later */
- PUT_OCTAL(header.mtime, statbuf->st_mtime);
+ /* users report that files with negative st_mtime cause trouble, so: */
+ PUT_OCTAL(header.mtime, statbuf->st_mtime >= 0 ? statbuf->st_mtime : 0);
/* Enter the user and group names */
safe_strncpy(header.uname, get_cached_username(statbuf->st_uid), sizeof(header.uname));
} else if (S_ISFIFO(statbuf->st_mode)) {
header.typeflag = FIFOTYPE;
} else if (S_ISREG(statbuf->st_mode)) {
- if (sizeof(statbuf->st_size) > 4
- && statbuf->st_size > (off_t)0777777777777LL
+ /* header.size field is 12 bytes long */
+ /* Does octal-encoded size fit? */
+ uoff_t filesize = statbuf->st_size;
+ if (sizeof(filesize) <= 4
+ || filesize <= (uoff_t)0777777777777LL
) {
+ PUT_OCTAL(header.size, filesize);
+ }
+ /* Does base256-encoded size fit?
+ * It always does unless off_t is wider than 64 bits.
+ */
+ else if (ENABLE_FEATURE_TAR_GNU_EXTENSIONS
+#if ULLONG_MAX > 0xffffffffffffffffLL /* 2^64-1 */
+ && (filesize <= 0x3fffffffffffffffffffffffLL)
+#endif
+ ) {
+ /* GNU tar uses "base-256 encoding" for very large numbers.
+ * Encoding is binary, with highest bit always set as a marker
+ * and sign in next-highest bit:
+ * 80 00 .. 00 - zero
+ * bf ff .. ff - largest positive number
+ * ff ff .. ff - minus 1
+ * c0 00 .. 00 - smallest negative number
+ */
+ char *p8 = header.size + sizeof(header.size);
+ do {
+ *--p8 = (uint8_t)filesize;
+ filesize >>= 8;
+ } while (p8 != header.size);
+ *p8 |= 0x80;
+ } else {
bb_error_msg_and_die("can't store file '%s' "
"of size %"OFF_FMT"u, aborting",
fileName, statbuf->st_size);
}
header.typeflag = REGTYPE;
- PUT_OCTAL(header.size, statbuf->st_size);
} else {
bb_error_msg("%s: unknown file type", fileName);
return FALSE;
DBG("writeFileToTarball('%s')", fileName);
- /* Strip leading '/' (must be before memorizing hardlink's name) */
- header_name = fileName;
- while (header_name[0] == '/') {
- static smallint warned;
-
- if (!warned) {
- bb_error_msg("removing leading '/' from member names");
- warned = 1;
- }
- header_name++;
- }
+ /* Strip leading '/' and such (must be before memorizing hardlink's name) */
+ header_name = strip_unsafe_prefix(fileName);
if (header_name[0] == '\0')
return TRUE;
llist_t *newlist = NULL;
while (list) {
- src_stream = xfopen_for_read(llist_pop(&list));
+ src_stream = xfopen_stdin(llist_pop(&list));
while ((line = xmalloc_fgetline(src_stream)) != NULL) {
/* kill trailing '/' unless the string is just "/" */
char *cp = last_char_is(line, '/');
//usage: )
//usage: "\n x Extract"
//usage: "\n t List"
-//usage: "\nOptions:"
//usage: "\n f Name of TARFILE ('-' for stdin/out)"
//usage: "\n C Change to DIR before operation"
//usage: "\n v Verbose"
/* Prepend '-' to the first argument if required */
opt_complementary = "--:" // first arg is options
"tt:vv:" // count -t,-v
- "X::T::" // cumulative lists
+ IF_FEATURE_TAR_FROM("X::T::") // cumulative lists
#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
"\xff::" // cumulative lists for --exclude
#endif
putenv((char*)"TAR_FILETYPE=f");
signal(SIGPIPE, SIG_IGN);
tar_handle->action_data = data_extract_to_command;
+ IF_FEATURE_TAR_TO_COMMAND(tar_handle->tar__to_command_shell = xstrdup(get_shell_name());)
}
if (opt & OPT_KEEP_OLD)
tar_handle->src_fd = tar_fd;
tar_handle->seek = seek_by_read;
} else {
- if (ENABLE_FEATURE_TAR_AUTODETECT && flags == O_RDONLY) {
- get_header_ptr = get_header_tar;
+ if (ENABLE_FEATURE_TAR_AUTODETECT
+ && flags == O_RDONLY
+ && get_header_ptr == get_header_tar
+ ) {
tar_handle->src_fd = open_zipped(tar_filename);
if (tar_handle->src_fd < 0)
bb_perror_msg_and_die("can't open '%s'", tar_filename);