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.
[EMAIL PROTECTED] [/tmp] # cat /etc/redhat-release
Red Hat Enterprise Linux ES release 4 (Nahant Update 4)
[EMAIL PROTECTED] [~] # 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
[EMAIL PROTECTED] [/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 =)
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