I am passing text from a bash script to php. Everything works except the mount and unmount bash commands. What am I doing wrong?

Question

I have a bash script that mounts a usb drive, reads a text file on the usb drive, and echos that file to the php program that called it. The mount and unmount does not work.

If I mount the usb from command line the php works. Evidence points to the umount and mount not working. Any feedback would be appreciated.

Bash Script: DisplayTextFile.sh

#! /bin/bash
umount /dev/sdc1
mount -t vfat /dev/sdc1 /media/usbdisc -o uid=1000,gid=1000,utf8,dmask=000,fmask=000
$filetoecho=$(</media/usbdisc/textfile.txt)
echo "File Content: $filetoecho"
umount /dev/sdc1
exit $?

PHP that Calls Bash Script:

ob_start();
$command="/bin/bash /path/DisplayTextFile.sh"
passthru($command, &$result);
$filetoecho=ob_get_contents();
ob_end_clean();

(u)mount requires root privileges. Are you definetely running as root? — Neil Masters
you need to assign /bin/bash or /bin/sh to the user executing the php script in your sudoers file. — Alex
I added the script to the sudoers file at /etc/sudoers and the script started working. Thanks. — lostinnow

lostinnow lostinnow · Accepted Answer · 2014-12-19T15:55:50

As suggested above, I added DisplayTextFile.sh to sudoers at /etc/sudoers and it worked. I used nano to make the following entry:

www-data ALL=(ALL) NPPASSWD: /path/DisplayTextFile.sh

Once that entry was made, the problem was solved. Thanks a bunch.

I am passing text from a bash script to php. Everything works except the mount and unmount bash commands. What am I doing wrong?

2 Answers