bin/tar incorrectly parse '[^...]' patterns in --exclude

[Mykola Dzham]

Hi!
bsd tar parse only '[!...]' as negate pattern, but gnu tar and bsd tar
on 8-STABLE parse '[^...]' too:

# uname -a
FreeBSD laptop.levsha.me 9.0-CURRENT FreeBSD 9.0-CURRENT #4 r212602M: Wed Sep 
15 04:50:20 EEST 2010     r...@laptop.levsha.me:/usr/obj/usr/src/sys/LEVSHA  
amd64
# tar --version
bsdtar 2.8.3 - libarchive 2.7.901a
# tar -tzvf test.tbz
-rw-r--r--  0 levsha levsha      0 Oct  5 01:27 a
-rw-r--r--  0 levsha levsha      0 Oct  5 01:27 b
-rw-r--r--  0 levsha levsha      0 Oct  5 01:27 c
-rw-r--r--  0 levsha levsha      0 Oct  5 01:27 d
# tar -tzvf test.tbz --exclude '[!a]' 
-rw-r--r--  0 levsha levsha      0 Oct  5 01:27 a
# tar -tzvf test.tbz --exclude '[^a]'
-rw-r--r--  0 levsha levsha      0 Oct  5 01:27 b
-rw-r--r--  0 levsha levsha      0 Oct  5 01:27 c
-rw-r--r--  0 levsha levsha      0 Oct  5 01:27 d
# gtar -tzvf test.tbz --exclude '[^a]'
-rw-r--r-- levsha/levsha     0 2010-10-05 01:27 a
#

# uname -a
FreeBSD levsha.kiev.xxx.com.ua 8.1-STABLE FreeBSD 8.1-STABLE #10 r212252: Mon 
Sep  6 13:12:07 EEST 2010     
r...@levsha.kiev.xxx.com.ua:/usr/obj/usr/src/sys/LEVSHA  i386
# tar --version
bsdtar 2.7.0 - libarchive 2.7.0
# tar -tzvf test.tbz
-rw-r--r--  0 levsha levsha      0  5 жов 01:27 a
-rw-r--r--  0 levsha levsha      0  5 жов 01:27 b
-rw-r--r--  0 levsha levsha      0  5 жов 01:27 c
-rw-r--r--  0 levsha levsha      0  5 жов 01:27 d
# tar -tzvf test.tbz --exclude '[!a]'
-rw-r--r--  0 levsha levsha      0  5 жов 01:27 a
# tar -tzvf test.tbz --exclude '[^a]'
-rw-r--r--  0 levsha levsha      0  5 жов 01:27 a
# 

Fix:

Index: usr.bin/tar/pathmatch.c
===================================================================
--- usr.bin/tar/pathmatch.c     (revision 212602)
+++ usr.bin/tar/pathmatch.c     (working copy)
@@ -35,7 +35,7 @@
 
 /*
  * Check whether a character 'c' is matched by a list specification [...]:
- *    * Leading '!' negates the class.
+ *    * Leading '!' or '^' negates the class.
  *    * <char>-<char> is a range of characters
  *    * \<char> removes any special meaning for <char>
  *
@@ -60,7 +60,7 @@
        (void)flags; /* UNUSED */
 
        /* If this is a negated class, return success for nomatch. */
-       if (*p == '!' && p < end) {
+       if ((*p == '!' || *p == '^') && p < end) {
                match = 0;
                nomatch = 1;
                ++p;

-- 
LEFT-(UANIC|RIPE)
JID: lev...@jabber.net.ua
PGP fingerprint: 1BCD 7C80 2E04 7282 C944  B0E0 7E67 619E 4E72 9280

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