Script needs sudo access to /usr/bin/mount. Elegant check? [solved]

graysky · 2015-08-30 10:55:15

Within a shell script, what an elegant way to check to see if the user invoking the script, has sudo access to specifically /usr/bin/mount and /usr/bin/umount?

I have added this line to /etc/sudoers

foo ALL=(ALL) NOPASSWD: /usr/bin/mount,/usr/bin/umount

What I thought about doing:
`sudo -n mount &>/dev/null` which should return 0 if the user can run it as sudo and `sudo -n umount -V` which also will return 0.

Last edited by graysky (2015-09-01 16:36:50)

brebs · 2015-08-30 11:32:41

Looks like mount with the options -f and -n, would be a better test of whether the command would actually succeed.

jsoy9pQbYVNu5nfU · 2015-08-30 11:32:56

^ That's better.
--
How about adding -k to prevent a lingering timestamp from influencing the result:

sudo -kn mount &>/dev/null && echo "Can run" || echo "Can't ruN"

Last edited by jsoy9pQbYVNu5nfU (2015-08-30 11:33:58)

Mr.Elendig · 2015-09-01 02:06:09

http://udisks.freedesktop.org/docs/latest/
https://wiki.archlinux.org/index.php/Udisks

if present is more elegant than sudo mount

graysky · 2015-09-01 14:22:48

Thanks all. I opted for:

    sudo -nk mount &>/dev/null
    [[ $? -ne 0 ]] && FAILCODE=1

    sudo -nk umount -V &>/dev/null
    [[ $? -ne 0 ]] && FAILCODE=1

EDIT: I opened a new thread here to solicit feedback from udisks/udisks2 users to achieve this without the bash helper script.

Last edited by graysky (2015-09-18 19:31:13)

Arch Linux

#1 2015-08-30 10:55:15

Script needs sudo access to /usr/bin/mount. Elegant check? [solved]

#2 2015-08-30 11:32:41

Re: Script needs sudo access to /usr/bin/mount. Elegant check? [solved]

#3 2015-08-30 11:32:56

Re: Script needs sudo access to /usr/bin/mount. Elegant check? [solved]

#4 2015-09-01 02:06:09

Re: Script needs sudo access to /usr/bin/mount. Elegant check? [solved]

#5 2015-09-01 14:22:48

Re: Script needs sudo access to /usr/bin/mount. Elegant check? [solved]

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