From 8f0112cb2365f4635895014debbf9355f6b54ecf Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Fri, 4 Feb 2005 01:52:20 +0000 Subject: [PATCH] (from_header): New arg OCTAL_ONLY, normally false. All uses changed. Fix typo that sometimes suppressed all "Archive contains obsolescent base-64 headers" warnings, not just the first one. (tar_checksum): Accept only octal checksums, since they aren't supposed to overflow into weird formats. --- src/list.c | 68 +++++++++++++++++++++++++++++------------------------- 1 file changed, 37 insertions(+), 31 deletions(-) diff --git a/src/list.c b/src/list.c index e06c42a..e0f5080 100644 --- a/src/list.c +++ b/src/list.c @@ -37,7 +37,7 @@ size_t recent_long_name_blocks; /* number of blocks in recent_long_name */ size_t recent_long_link_blocks; /* likewise, for long link */ static uintmax_t from_header (const char *, size_t, const char *, - uintmax_t, uintmax_t, bool); + uintmax_t, uintmax_t, bool, bool); /* Base 64 digits; see Internet RFC 2045 Table 1. */ static char const base_64_digits[64] = @@ -285,7 +285,7 @@ tar_checksum (union block *header, bool silent) int recorded_sum; uintmax_t parsed_sum; char *p; - + p = header->buffer; for (i = sizeof *header; i-- != 0;) { @@ -309,12 +309,12 @@ tar_checksum (union block *header, bool silent) parsed_sum = from_header (header->header.chksum, sizeof header->header.chksum, 0, (uintmax_t) 0, - (uintmax_t) TYPE_MAXIMUM (int), silent); + (uintmax_t) TYPE_MAXIMUM (int), true, silent); if (parsed_sum == (uintmax_t) -1) return HEADER_FAILURE; recorded_sum = parsed_sum; - + if (unsigned_sum != recorded_sum && signed_sum != recorded_sum) return HEADER_FAILURE; @@ -350,7 +350,7 @@ read_header (bool raw_extended_headers) while (1) { enum read_header status; - + header = find_next_block (); current_header = header; if (!header) @@ -381,7 +381,7 @@ read_header (bool raw_extended_headers) size = name_size + BLOCKSIZE; if (n) size += BLOCKSIZE - n; - + if (name_size != current_stat_info.stat.st_size || size < name_size) xalloc_die (); @@ -619,14 +619,15 @@ decode_header (union block *header, struct tar_stat_info *stat_info, } /* Convert buffer at WHERE0 of size DIGS from external format to - uintmax_t. The data is of type TYPE. The buffer must represent a - value in the range -MINUS_MINVAL through MAXVAL. DIGS must be - positive. SILENT=true inhibits printing diagnostic messages. - Return -1 on error, diagnosing the error if TYPE is - nonzero. */ + uintmax_t. DIGS must be positive. If TYPE is nonnull, the data + are of type TYPE. The buffer must represent a value in the range + -MINUS_MINVAL through MAXVAL. If OCTAL_ONLY, allow only octal + numbers instead of the other GNU extensions. Return -1 on error, + diagnosing the error if TYPE is nonnull and if !SILENT. */ static uintmax_t from_header (char const *where0, size_t digs, char const *type, - uintmax_t minus_minval, uintmax_t maxval, bool silent) + uintmax_t minus_minval, uintmax_t maxval, + bool octal_only, bool silent) { uintmax_t value; char const *where = where0; @@ -716,19 +717,24 @@ from_header (char const *where0, size_t digs, char const *type, return -1; } } + else if (octal_only) + { + /* Suppress the following extensions. */ + } else if (*where == '-' || *where == '+') { /* Parse base-64 output produced only by tar test versions 1.13.6 (1999-08-11) through 1.13.11 (1999-08-23). Support for this will be withdrawn in future releases. */ int dig; - static int warned_once; - if (! warned_once) + if (!silent) { - warned_once = 1; - if (!silent) - WARN ((0, 0, - _("Archive contains obsolescent base-64 headers"))); + static bool warned_once; + if (! warned_once) + { + warned_once = true; + WARN ((0, 0, _("Archive contains obsolescent base-64 headers"))); + } } negative = *where++ == '-'; while (where != lim @@ -837,7 +843,7 @@ gid_from_header (const char *p, size_t s) return from_header (p, s, "gid_t", - (uintmax_t) TYPE_MINIMUM (gid_t), (uintmax_t) TYPE_MAXIMUM (gid_t), - false); + false, false); } major_t @@ -845,7 +851,7 @@ major_from_header (const char *p, size_t s) { return from_header (p, s, "major_t", - (uintmax_t) TYPE_MINIMUM (major_t), - (uintmax_t) TYPE_MAXIMUM (major_t), false); + (uintmax_t) TYPE_MAXIMUM (major_t), false, false); } minor_t @@ -853,7 +859,7 @@ minor_from_header (const char *p, size_t s) { return from_header (p, s, "minor_t", - (uintmax_t) TYPE_MINIMUM (minor_t), - (uintmax_t) TYPE_MAXIMUM (minor_t), false); + (uintmax_t) TYPE_MAXIMUM (minor_t), false, false); } mode_t @@ -862,7 +868,7 @@ mode_from_header (const char *p, size_t s) /* Do not complain about unrecognized mode bits. */ unsigned u = from_header (p, s, "mode_t", - (uintmax_t) TYPE_MINIMUM (mode_t), - TYPE_MAXIMUM (uintmax_t), false); + TYPE_MAXIMUM (uintmax_t), false, false); return ((u & TSUID ? S_ISUID : 0) | (u & TSGID ? S_ISGID : 0) | (u & TSVTX ? S_ISVTX : 0) @@ -883,14 +889,14 @@ off_from_header (const char *p, size_t s) /* Negative offsets are not allowed in tar files, so invoke from_header with minimum value 0, not TYPE_MINIMUM (off_t). */ return from_header (p, s, "off_t", (uintmax_t) 0, - (uintmax_t) TYPE_MAXIMUM (off_t), false); + (uintmax_t) TYPE_MAXIMUM (off_t), false, false); } size_t size_from_header (const char *p, size_t s) { return from_header (p, s, "size_t", (uintmax_t) 0, - (uintmax_t) TYPE_MAXIMUM (size_t), false); + (uintmax_t) TYPE_MAXIMUM (size_t), false, false); } time_t @@ -898,7 +904,7 @@ time_from_header (const char *p, size_t s) { return from_header (p, s, "time_t", - (uintmax_t) TYPE_MINIMUM (time_t), - (uintmax_t) TYPE_MAXIMUM (time_t), false); + (uintmax_t) TYPE_MAXIMUM (time_t), false, false); } uid_t @@ -906,14 +912,14 @@ uid_from_header (const char *p, size_t s) { return from_header (p, s, "uid_t", - (uintmax_t) TYPE_MINIMUM (uid_t), - (uintmax_t) TYPE_MAXIMUM (uid_t), false); + (uintmax_t) TYPE_MAXIMUM (uid_t), false, false); } uintmax_t uintmax_from_header (const char *p, size_t s) { return from_header (p, s, "uintmax_t", (uintmax_t) 0, - TYPE_MAXIMUM (uintmax_t), false); + TYPE_MAXIMUM (uintmax_t), false, false); } @@ -1109,7 +1115,7 @@ print_header (struct tar_stat_info *st, off_t block_ordinal) sizeof current_header->header.uid, 0, (uintmax_t) 0, (uintmax_t) TYPE_MAXIMUM (uintmax_t), - false); + false, false); if (u != -1) user = STRINGIFY_BIGINT (u, uform); else @@ -1132,7 +1138,7 @@ print_header (struct tar_stat_info *st, off_t block_ordinal) sizeof current_header->header.gid, 0, (uintmax_t) 0, (uintmax_t) TYPE_MAXIMUM (uintmax_t), - false); + false, false); if (g != -1) group = STRINGIFY_BIGINT (g, gform); else @@ -1282,7 +1288,7 @@ skip_file (off_t size) else seekable_archive = false; } - + while (size > 0) { x = find_next_block (); @@ -1303,7 +1309,7 @@ skip_member (void) { char save_typeflag = current_header->header.typeflag; set_next_block_after (current_header); - + assign_string (&save_name, current_stat_info.file_name); if (current_stat_info.is_sparse) -- 2.45.2