Date: Mon, 6 Jan 2003 06:03:12 +0200 From: Giorgos Keramidas <keramida@freebsd.org> To: "Gary W. Swearingen" <swear@attbi.com> Cc: doc@freebsd.org Subject: Re: docs/46787: compress(1) manpage missing BUGS; other cleanup. Message-ID: <20030106040312.GA6593@gothmog.gr> In-Reply-To: <5zy95zknwe.95z@localhost.localdomain> References: <hjk7hjmpdz.7hj@localhost.localdomain> <20030105225020.GA2565@gothmog.gr> <5zy95zknwe.95z@localhost.localdomain>
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On 2003-01-05 18:33, "Gary W. Swearingen" <swear@attbi.com> wrote:
> For easiest example is to copy a plain text file to "xxx" and do
> "ls xxx*; uncompress -f xxx"; ls xxx*. Gone. Try it again and also
> copy a different size file to "xxx.Z". Gone. Try it once more but
> ensure that "xxx.Z" is a real compressed file. Not gone, just
> overwritten, as the manpage has always said.
>
> Thanks for your comments.
Well, thank you to for reporting this!
I think I have located the source of this bug. I just added the
following comment to a local tree, and I'm off to bed since it's way
past my bedtime. Tomorrow, I will try to fix this and ask the
friendly reviewers of freebsd-audit to bitch at me until the bug is
fixed in a way that makes everyone happy :=)
%%%
Index: compress.c
===================================================================
RCS file: /home/ncvs/src/usr.bin/compress/compress.c,v
retrieving revision 1.20
diff -u -r1.20 compress.c
--- compress.c 28 Jul 2002 15:32:17 -0000 1.20
+++ compress.c 6 Jan 2003 03:56:32 -0000
@@ -170,6 +170,19 @@
len = strlen(*argv);
if ((p = rindex(*argv, '.')) == NULL ||
strcmp(p, ".Z")) {
+ /*
+ * XXX: We are running in "decompress" mode &
+ * filename does not end in ".Z". Try to
+ * stick a .Z extension to it, and attempt to
+ * decompress that file instead. This can
+ * cause existing files to be overwritten if
+ * `*argv' happens to be a real file, so we
+ * should check with stat() here to see if the
+ * file `*argv' exists already, and avoid
+ * overwriting it in decompress() if and only
+ * if `*argv' exists AND `newname' does NOT
+ * exist at the same time.
+ */
if (len > sizeof(newname) - 3) {
cwarnx("%s: name too long", *argv);
break;
%%%
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