PHP无法读取/ var / tmp上的文件
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我有一个非常奇怪的错误. PHP无法读取存在的文件……有些想法？我没有安装SELinux.我正在使用fedora 17和php 5.4.
我已经尝试过我所知道的一切,但问题仍然存在.
[root@sqd var]# ls -lia
total 92
8194 drwxrwxrwx. 23 root root 4096 ago 17 10:30 .
2 dr-xr-xr-x. 19 root root 4096 ago 13 16:00 ..
32139 drwxr-xr-x. 2 root root 4096 may 22 13:42 account
288 drwxr-xr-x. 2 root root 4096 feb 3 2012 adm
13 drwxr-xr-x. 14 root root 4096 ago 8 10:26 cache
796005 drwxr-xr-x 2 root root 4096 feb 6 2012 cvs
289 drwxr-xr-x. 3 root root 4096 ago 21 18:07 db
290 drwxr-xr-x. 3 root root 4096 may 22 13:42 empty
263682 drwxr-xr-x. 3 root root 4096 ago 7 11:15 ftp
291 drwxr-xr-x. 2 root root 4096 feb 3 2012 games
35931 drwxrwx--T. 2 root gdm 4096 jun 8 16:05 gdm
292 drwxr-xr-x. 2 root root 4096 feb 3 2012 gopher
15 drwxr-xr-x. 45 root root 4096 ago 10 10:42 lib
296 drwxr-xr-x. 2 root root 4096 feb 3 2012 local
308 lrwxrwxrwx. 1 root root 11 may 22 13:39 lock -> ../run/lock
12 drwxr-xr-x. 14 root root 4096 ago 26 03:17 log
297 lrwxrwxrwx. 1 root root 10 may 22 13:39 mail -> spool/mail
298 drwxr-xr-x. 2 root root 4096 feb 3 2012 nis
931987 drwxrwxrwx 3 nobody nobody 4096 ago 17 10:32 nodejs
299 drwxr-xr-x. 2 root root 4096 feb 3 2012 opt
300 drwxr-xr-x. 2 root root 4096 feb 3 2012 preserve
307 lrwxrwxrwx. 1 root root 6 may 22 13:39 run -> ../run
301 drwxr-xr-x. 15 root root 4096 may 22 13:43 spool
305 drwxrwxrwx. 5 nobody nobody 4096 ago 30 14:13 tmp
262637 drwxr-xr-x. 7 root root 4096 ago 7 11:20 www
306 drwxr-xr-x. 2 root root 4096 feb 3 2012 yp
[root@sqd var]# ls -lia tmp/
total 216
305 drwxrwxrwx. 5 nobody nobody 4096 ago 30 14:13 .
8194 drwxrwxrwx. 23 root root 4096 ago 17 10:30 ..
3030 -rwxrwxrwx 1 nobody nobody 199397 ago 30 14:13 file_thumb_5363_1_0.jpg
但
<?php
highlight_file(__FILE__);
var_dump(file_exists('/var/tmp/file_thumb_5363_1_0.jpg'));
打印：
bool(false)
解决方法:
Fedora 16引入了“私有tmp”/ tmp和/ var / tmp的概念我会在这方面投入2美分.
2.3.3. Services Private /tmp
A number of services managed by systemd have been modified to make use of its ability to provide them with a
private /tmp directory. Privileged services using /tmp and /var/tmp
have previously been found to be open to being interfered with by
unprivileged users, potentially leading to privilege escalation. Using
private /tmp directories for services prevents this style of exploit.The directive added to the systemd unit files for the modified
services is:[Service]
PrivateTmp=true
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