disk space check: add -P option to df

[alessandro-danti]

Hi,
I noticed that the output of df gets wrapped around on a new line when the device name is longer than 21 characters. See here:

[user@host ~]$ df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg_host-lv_root
                       17G  1.7G   15G  11% /
tmpfs                 1.9G     0  1.9G   0% /dev/shm
/dev/vda1             477M   69M  384M  16% /boot

the -P option would make the output POSIX compliant and then avoiding the line wrapping. Like here:

[user@host ~]$ df -hP
Filesystem                     Size  Used Avail Use% Mounted on
/dev/mapper/vg_host-lv_root      17G  1.7G   15G  11% /
tmpfs                           1.9G     0  1.9G   0% /dev/shm
/dev/vda1                       477M   69M  384M  16% /boot

This would make life easier when parsing the output of the script.
Thanks!

[yebo29]

Also addressed in #9