Newsgroups: php.internals Path: news.php.net Xref: news.php.net php.internals:29709 Return-Path: Mailing-List: contact internals-help@lists.php.net; run by ezmlm Delivered-To: mailing list internals@lists.php.net Received: (qmail 93014 invoked by uid 1010); 23 May 2007 22:43:30 -0000 Delivered-To: ezmlm-scan-internals@lists.php.net Delivered-To: ezmlm-internals@lists.php.net Received: (qmail 92999 invoked from network); 23 May 2007 22:43:30 -0000 Received: from unknown (HELO lists.php.net) (127.0.0.1) by localhost with SMTP; 23 May 2007 22:43:30 -0000 Authentication-Results: pb1.pair.com header.from=brianm@dealnews.com; sender-id=pass Authentication-Results: pb1.pair.com smtp.mail=brianm@dealnews.com; spf=pass; sender-id=pass Received-SPF: pass (pb1.pair.com: domain dealnews.com designates 129.41.69.185 as permitted sender) X-PHP-List-Original-Sender: brianm@dealnews.com X-Host-Fingerprint: 129.41.69.185 smtp.dealnews.com Linux 2.5 (sometimes 2.4) (4) Received: from [129.41.69.185] ([129.41.69.185:59841] helo=smtp.dealnews.com) by pb1.pair.com (ecelerity 2.1.1.9-wez r(12769M)) with ESMTP id 1F/B5-52937-193C4564 for ; Wed, 23 May 2007 18:43:30 -0400 Received: (qmail 4666 invoked from network); 23 May 2007 18:43:26 -0400 Received: from unknown (HELO mail.dealnews.com) (10.1.1.7) by -H with (DHE-RSA-AES256-SHA encrypted) SMTP; 23 May 2007 18:43:26 -0400 Received: (qmail 11512 invoked from network); 23 May 2007 18:43:26 -0400 Received: from h77.21.91.75.ip.alltel.net (HELO ?10.1.6.4?) (brianm@75.91.21.77) by -H with ESMTPA; 23 May 2007 18:43:26 -0400 Message-ID: <4654C380.7060206@dealnews.com> Date: Wed, 23 May 2007 17:43:12 -0500 User-Agent: Thunderbird 2.0.0.0 (Macintosh/20070326) MIME-Version: 1.0 To: internals@lists.php.net References: <4638E608.2090202@adaniels.nl> <4654A616.7050302@adaniels.nl> <4654BD0A.60903@macvicar.net> <4654C01C.6040600@lerdorf.com> In-Reply-To: <4654C01C.6040600@lerdorf.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [PHP-DEV] Re: Still having lstat trouble From: brianm@dealnews.com (Brian Moon) Works as expected on my Mac (no strace on my Mac). On my Gentoo 64-bit server, I get the wrong data from Apache2 and CLI. On my 32-bit Gentoo server, without Apache 2, I get the correct answer from apache and cli. On my 32-bit Gentoo server with Apache 2 I get a wrong answer from Apache and cli. We build our PHP on these servers with the same options via emerge. The only difference is Apache 2. What the hell? # uname -a Linux proxy1 2.6.18-gentoo-r6 #1 SMP Thu Feb 8 07:32:31 EST 2007 x86_64 Dual-Core AMD Opteron(tm) Processor 2210 AuthenticAMD GNU/Linux # php foobar.php dir not a link same lstat("/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0 lstat("/tmp/pear", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 access("/tmp/pear", F_OK) = 0 lstat("/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0 lstat("/tmp/link-test", {st_mode=S_IFLNK|0777, st_size=9, ...}) = 0 readlink("/tmp/link-test", "/tmp/pear", 4096) = 9 lstat("/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0 lstat("/tmp/pear", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 access("/tmp/pear", F_OK) = 0 unlink("/tmp/link-test") = 0 lstat("/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0 lstat("/tmp/link-test", 0x7fff3f48fb70) = -1 ENOENT (No such file or directory) lstat("/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0 lstat("/tmp/pear", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 symlink("/tmp/pear", "/tmp/link-test") = 0 lstat("/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0 lstat("/tmp/link-test", {st_mode=S_IFLNK|0777, st_size=9, ...}) = 0 readlink("/tmp/link-test", "/tmp/pear", 4096) = 9 lstat("/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0 lstat("/tmp/pear", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 lstat("/tmp/pear", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b906b634000 write(1, "dir", 3dir) = 3 write(1, "\n", 1 ) = 1 write(1, "not a link", 10not a link) = 10 write(1, "\n", 1 ) = 1 lstat("/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0 lstat("/tmp/pear", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 stat("/tmp/pear", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 write(1, "same", 4same) = 4 32-bit Gentoo however acts as expected. $ uname -a Linux deadpool 2.6.11-gentoo-r6 #1 SMP Thu Apr 14 07:52:09 EDT 2005 i686 Intel(R) Xeon(TM) CPU 3.20GHz GenuineIntel GNU/Linux php test.php link link differ access("/tmp/pear", F_OK) = 0 access("/tmp/link-test", F_OK) = 0 unlink("/tmp/link-test") = 0 time(NULL) = 1179959743 lstat64("/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=14416, ...}) = 0 lstat64("/tmp/link-test", 0xbfff5e4c) = -1 ENOENT (No such file or directory) time(NULL) = 1179959743 lstat64("/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=14416, ...}) = 0 lstat64("/tmp/pear", {st_mode=S_IFDIR|0755, st_size=72, ...}) = 0 symlink("/tmp/pear", "/tmp/link-test") = 0 lstat64("/tmp/link-test", {st_mode=S_IFLNK|0777, st_size=9, ...}) = 0 fstat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb78b1000 write(1, "link", 4link) = 4 write(1, "\n", 1 ) = 1 write(1, "link", 4link) = 4 write(1, "\n", 1 ) = 1 stat64("/tmp/pear", {st_mode=S_IFDIR|0755, st_size=72, ...}) = 0 write(1, "differ", 6differ) = 6 Rasmus Lerdorf wrote: > lstat64("/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0 > lstat64("/tmp/link-test", 0xbff229ec) = -1 ENOENT (No such file or > directory) > lstat64("/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0 > lstat64("/tmp/pear", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 > symlink("/tmp/pear", "/tmp/link-test") = 0 > lstat64("/tmp/link-test", {st_mode=S_IFLNK|0777, st_size=9, ...}) = 0 > write(1, "link", 4link) = 4 > write(1, "\n", 1 > ) = 1 > write(1, "link", 4link) = 4 > write(1, "\n", 1 > ) = 1 > stat64("/tmp/pear", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 > write(1, "differ", 6differ) = 6 > > > Scott MacVicar wrote: >> I'm getting similar results from a RHEL 4 box we have here, its running >> 5.2.3-dev. >> >> scott@scarlet [/tmp] # cat /etc/redhat-release >> Red Hat Enterprise Linux ES release 4 (Nahant Update 4) >> >> scott@scarlet [~] # uname -a >> Linux scarlet 2.6.9-42.0.2.ELsmp #1 SMP Thu Aug 17 18:00:32 EDT 2006 >> i686 i686 i386 GNU/Linux >> >> scott@scarlet [/tmp] # php test.php >> dir >> not a link >> same >> >> strace for the during execution is. >> >> lstat64("/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0 >> lstat64("/tmp/link-test", {st_mode=S_IFLNK|0777, st_size=9, ...}) = 0 > > That means /tmp/link-test exists already, otherwise lstat returns -1. > Here is what I see if the link already exists when I run my script: > > access("/tmp/pear", F_OK) = 0 > access("/tmp/link-test", F_OK) = 0 > unlink("/tmp/link-test") = 0 > lstat64("/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0 > lstat64("/tmp/link-test", 0xbff229ec) = -1 ENOENT (No such file or > directory) > lstat64("/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0 > lstat64("/tmp/pear", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 > symlink("/tmp/pear", "/tmp/link-test") = 0 > lstat64("/tmp/link-test", {st_mode=S_IFLNK|0777, st_size=9, ...}) = 0 > write(1, "link", 4link) = 4 > write(1, "\n", 1 > ) = 1 > write(1, "link", 4link) = 4 > write(1, "\n", 1 > ) = 1 > stat64("/tmp/pear", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0 > write(1, "differ", 6differ) = 6 > > So did you leave out those access() calls, and did they fail, or did the > unlink() fail perhaps? > > -Rasmus > -- Brian Moon Senior Developer ------------------------------ http://dealnews.com/ It's good to be cheap =)