php exec crontab 不工作
我尝试在我的本地 CentOS 5.3 服务器上，当我尝试从 apache web 服务器执行我的 php 代码中的以下行时
exec("crontab -l", $output, $arg);
The $arg reply 127 (command not found code)
然后我更改了下面的代码
exec("/usr/bin/crontab -l", $output, $arg);
The $arg reply 126 (Permission problem code)
这是我当前的权限 /usr/bin/crontab -rwsr-sr-x 1 root root 311288 2007 年 3 月 15 日 /usr/bin/crontab。
并且没有 /etc/cron.allow 和 /etc/cron.deny 文件。
我已经在 php.ini 中关闭了 Safe_mode 。有什么建议可以解决这个问题吗？
/////////////////////////////////////////////////////////// //////////////////////////////
我注意到我的问题与selinux有关。 时，它正在工作
当我禁用 selinux echo 0 > 。 /selinux/enforce
但我不想禁用selinux，selinux 中是否有任何选项允许来自apache 的crontab？
I trying on my local CentOS 5.3 server, when I try to execute below line in my php code from apache webserver
exec("crontab -l", $output, $arg);
The $arg reply 127 (command not found code)
Then I changed below code
exec("/usr/bin/crontab -l", $output, $arg);
The $arg reply 126 (Permission problem code)
Here is my current permission of
/usr/bin/crontab -rwsr-sr-x 1 root root 311288 Mar 15 2007 /usr/bin/crontab.
And there is no /etc/cron.allow and /etc/cron.deny file.
I already turned off Safe_mode in php. Any suggestion to solve this problem?
////////////////////////////////////////////////////////////////////////////////
I note that my problem is related to selinux.
It is working, when I disable selinux
echo 0 > /selinux/enforce
But I don't want to disable selinux, is there any option in selinux to allow crontab from apache?
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您可以在 php 错误日志中查找错误的详细描述，但正如您所说，您熟悉 Linux，我无法教您有关用户权限管理的知识。关于 env 变量和路径变量的注释：当您运行程序时，并不总是确定 env 变量会被导出。您的问题可能就是这种情况。这意味着操作系统已损坏，或者您必须手动将环境变量附加到程序中。解决方法是查看 shell 在哪里寻找程序并对该程序进行符号链接。在您的错误日志中，crontab 似乎位于文件夹 /usr/bin 中。而且这似乎不是一个编程问题。在 server.stackexchange 询问为什么找不到 crontab。例如我的环境如下所示：
LC_PAPER=de_DE
LC_ADDRESS=de_DE
LC_MONETARY=de_DE
AF_PIDDIR=/tmp/af-piddir
UPNP_ROOT=upnpav://
外壳=/bin/sh
术语=xterm
DISABLE_GATEWAY=1
GTK2_RC_FILES=/etc/hildon/theme/gtk-2.0/gtkrc
TMPDIR=/var/tmp
MMC_SWAP_LOCATION=/media/mmc1
LC_NUMERIC=de_DE
MMC_MOUNTPOINT=/media/mmc1
OLDPWD=/根
HILDON_FM_OBEX_ROOT=obex://
LAUNCHWRAPPER_NICE_KILL=/etc/osso-af-init/nice-kill-launch-wrapper.sh
INTERNAL_MMC_MOUNTPOINT=/home/user/MyDocs
OSSO_VERSION=RX-51_2009SE_20.2010.36-2_PR_MR0
用户=root
LS_COLORS=否=00:fi=00:di=00;36:ln=00;35:pi=40;33:so=01;35:bd=40;32;0 0:cd=40;32;00:or=01;05;37;41:mi=01;05;37;41:ex=00;33:.cmd=00;32:< /em>.exe=00;32:.com=00;32:.btm=00;32:.bat=00;32:.sh=00; 32:.csh=00;32:.tar=00;31:.tgz=00;31:.arj=00;31 :.taz=00;31:.lzh=00;31:.zip=00;31:.z=00;31:.Z= 00;31:.gz=00;31:.bz2=00;31:.bz=00;31:.tz=00;31: >.rpm=00;31:.cpio=00;31:.jpg=00;35:.gif=00;35:.bmp=00;35: .xbm=00;35：.xpm=00;35：.png=00;35：.tif=00;35：
LC_TELEPHONE=de_DE
SESSION_BUS_PID_FILE=/tmp/dbus_session_bus.pid.user
OSSO_PRODUCT_HARDWARE=RX-51
STATESAVEDIR=/tmp/osso-appl-states
LAUNCHWRAPPER_NICE_TRYRESTART=/etc/osso-af-init/nice-launch-wrapper-tryrestart.sh
OSSO_PRODUCT_FULL_NAME=诺基亚 N900
OSSO_PRODUCT_RELEASE_FULL_NAME=Maemo 5
OSSO_PRODUCT_RELEASE_NAME=Maemo 5
MYDOCSDIR=/home/用户/MyDocs
PATH=/usr/bin/gnu:/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin:/usr/local/sbin
LC_MESSAGES=de_DE
OSSO_PRODUCT_SHORT_NAME=诺基亚 N900
SESSION_BUS_ADDRESS_FILE=/tmp/session_bus_address.user
LC_IDENTIFICATION=de_DE
PWD=/home/用户/MyDocs
编辑器=/usr/bin/nano -w -c
LANG=de_DE
错误=0
LC_MEASUREMENT=de_DE
PS1=[\033[1;36m][[\033[0;36m]\u\h[\033[0;37m]:\w[\033[1;36m]][\033[m]$ [\033[0;37;00m]
ILLEGAL_FAT_CHARS=/:*?>>|
OSSO_PRODUCT_KEYBOARD=德语
AF_DEFINES_SOURCED=1
SLVL=1
首页=/根目录
SDL_AUDIODRIVER=脉冲
OSSO_SWAP=/home/用户/MyDocs
OSSO_PRODUCT_RELEASE_VERSION=20.2010.36-2
LS_OPTIONS=--颜色
LAUNCHWRAPPER_TRYRESTART=/etc/osso-af-init/launch-wrapper-tryrestart.sh
OSSO_PRODUCT_NAME=N900
AF_INIT_DIR=/etc/osso-af-init
MMC_DEVICE_FILE=/dev/mmcblk0p1
日志名称=根
DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-eCbOI2qrVP,guid=cd1dea104334a338a9007b9700000014
LAUNCHWRAPPER=/etc/osso-af-init/launch-wrapper.sh
OSSO_PRODUCT_WLAN_CHANNEL=fcc/us
MAX_FILENAME_LENGTH=255
显示=:0.0
LAUNCHWRAPPER_NICE=/etc/osso-af-init/nice-launch-wrapper.sh
LC_TIME=de_DE
INTERNAL_MMC_SWAP_LOCATION=/home/user/MyDocs
LC_NAME=de_DE
OSSO_PRODUCT_REGION=德国
_=/usr/bin/gnu/env
只需在提示符中输入 env 即可。
You can look in the php error log for a detailed description of the error but as you said you are familiar with Linux I can't teach you about user right management. A note to the env variable and the path variable it's not always sure the env variable get exported when you run a program. This is maybe the case with your problem. It means either the os is broken or you have to attach the env variable manually to your program. A workaround can be to look where the shell is looking for programs and symlink the program. In your error log it seems that crontab is in the folder /usr/bin. Also this seems not to be a programming question. Ask at server.stackexchange why crontab isn't found. For example my env looks like this:
LC_PAPER=de_DE
LC_ADDRESS=de_DE
LC_MONETARY=de_DE
AF_PIDDIR=/tmp/af-piddir
UPNP_ROOT=upnpav://
SHELL=/bin/sh
TERM=xterm
DISABLE_GATEWAY=1
GTK2_RC_FILES=/etc/hildon/theme/gtk-2.0/gtkrc
TMPDIR=/var/tmp
MMC_SWAP_LOCATION=/media/mmc1
LC_NUMERIC=de_DE
MMC_MOUNTPOINT=/media/mmc1
OLDPWD=/root
HILDON_FM_OBEX_ROOT=obex://
LAUNCHWRAPPER_NICE_KILL=/etc/osso-af-init/nice-kill-launch-wrapper.sh
INTERNAL_MMC_MOUNTPOINT=/home/user/MyDocs
OSSO_VERSION=RX-51_2009SE_20.2010.36-2_PR_MR0
USER=root
LS_COLORS=no=00:fi=00:di=00;36:ln=00;35:pi=40;33:so=01;35:bd=40;32;00:cd=40;32;00:or=01;05;37;41:mi=01;05;37;41:ex=00;33:.cmd=00;32:.exe=00;32:.com=00;32:.btm=00;32:.bat=00;32:.sh=00;32:.csh=00;32:.tar=00;31:.tgz=00;31:.arj=00;31:.taz=00;31:.lzh=00;31:.zip=00;31:.z=00;31:.Z=00;31:.gz=00;31:.bz2=00;31:.bz=00;31:.tz=00;31:.rpm=00;31:.cpio=00;31:.jpg=00;35:.gif=00;35:.bmp=00;35:.xbm=00;35:.xpm=00;35:.png=00;35:.tif=00;35:
LC_TELEPHONE=de_DE
SESSION_BUS_PID_FILE=/tmp/dbus_session_bus.pid.user
OSSO_PRODUCT_HARDWARE=RX-51
STATESAVEDIR=/tmp/osso-appl-states
LAUNCHWRAPPER_NICE_TRYRESTART=/etc/osso-af-init/nice-launch-wrapper-tryrestart.sh
OSSO_PRODUCT_FULL_NAME=Nokia N900
OSSO_PRODUCT_RELEASE_FULL_NAME=Maemo 5
OSSO_PRODUCT_RELEASE_NAME=Maemo 5
MYDOCSDIR=/home/user/MyDocs
PATH=/usr/bin/gnu:/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin:/usr/local/sbin
LC_MESSAGES=de_DE
OSSO_PRODUCT_SHORT_NAME=Nokia N900
SESSION_BUS_ADDRESS_FILE=/tmp/session_bus_address.user
LC_IDENTIFICATION=de_DE
PWD=/home/user/MyDocs
EDITOR=/usr/bin/nano -w -c
LANG=de_DE
ERR=0
LC_MEASUREMENT=de_DE
PS1=[\033[1;36m][[\033[0;36m]\u\h[\033[0;37m]:\w[\033[1;36m]][\033[m]$ [\033[0;37;00m]
ILLEGAL_FAT_CHARS=/:*?<>|
OSSO_PRODUCT_KEYBOARD=German
AF_DEFINES_SOURCED=1
SHLVL=1
HOME=/root
SDL_AUDIODRIVER=pulse
OSSO_SWAP=/home/user/MyDocs
OSSO_PRODUCT_RELEASE_VERSION=20.2010.36-2
LS_OPTIONS=--color
LAUNCHWRAPPER_TRYRESTART=/etc/osso-af-init/launch-wrapper-tryrestart.sh
OSSO_PRODUCT_NAME=N900
AF_INIT_DIR=/etc/osso-af-init
MMC_DEVICE_FILE=/dev/mmcblk0p1
LOGNAME=root
DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-eCbOI2qrVP,guid=cd1dea104334a338a9007b9700000014
LAUNCHWRAPPER=/etc/osso-af-init/launch-wrapper.sh
OSSO_PRODUCT_WLAN_CHANNEL=fcc/us
MAX_FILENAME_LENGTH=255
DISPLAY=:0.0
LAUNCHWRAPPER_NICE=/etc/osso-af-init/nice-launch-wrapper.sh
LC_TIME=de_DE
INTERNAL_MMC_SWAP_LOCATION=/home/user/MyDocs
LC_NAME=de_DE
OSSO_PRODUCT_REGION=Germany
_=/usr/bin/gnu/env
Just type env in the prompt.