Set sticky bit permission using bash script

Question

Can anyone guide, how to implement this linux command into a bash script

df --local -P | awk {'if (NR!=1) print $6'} | xargs -I '{}' find '{}' -xdev -type d -perm -0002 2>/dev/null | xargs chmod a+t

Just put it in a file with `#!/bin/bash` at the beginning and make it executable. What's the problem? — Barmar, Jan 12 '21 at 07:22
Its gives me this error "chmod: missing operand after ‘a+t’" — catty, Jan 12 '21 at 07:39
It gives you that result because your pipeline does not provide you any output. — kvantour, Jan 12 '21 at 07:46
Note: this is simple [tag:shell], not *specific* [tag:bash]. — F. Hauri - Give Up GitHub, Jan 12 '21 at 07:52

F. Hauri - Give Up GitHub · Accepted Answer · 2021-01-12T09:49:45.937

0

Simply

Put this in a file, add a shell shebang on 1st line:

#!/bin/sh

df --local -P |
    awk '{if (NR!=1) print $6}' |
    xargs -I '{}' find '{}' -xdev -type d -perm -0002 2>/dev/null |
    xargs --no-run-if-empty chmod a+t

But as this question is tagged bash:

Under bash, I would write this something like:

#!/bin/bash

{ read foo; mapfile -t mpoints;} < <(df --local -P)
TEXTDOMAIN=libc
exec 2> >(exec grep -v '^find: .*'$"Permission denied"\$ >&2)
find "${mpoints[@]#*% }" -xdev -type d -perm -0002 -exec chmod a+t {} +

Short, quick and efficient!

Explanation:

read foo just whipe header line of df output
mapfile -t take rest of df output into $mpoint array, (-t remove a trailing newline).
exec ... {} ... + will do approx same job than using xargs.
exec 2>... >&2 will silently delete lines matching regex in STDERR.
TEXTDOMAIN=libc and $"Permission denied" will localize message to make this script work in many languages.

edited Jan 12 '21 at 09:49

answered Jan 12 '21 at 07:23

F. Hauri - Give Up GitHub

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Its gives me this error "chmod: missing operand after ‘a+t’". – catty Jan 12 '21 at 07:34
1

You my have to add `--no-run-if-empty` to last `xargs` for case `find` output is empty. – F. Hauri - Give Up GitHub Jan 12 '21 at 07:47
... An put curly brace **into** quotes: `awk '{if (NR!=1) print $6}'`. – F. Hauri - Give Up GitHub Jan 12 '21 at 07:49
kool ..2 things come to mind 1) How to ensure root permission to execute the file 2) How to capture error in case of any and exist 1 – catty Jan 12 '21 at 09:11
@catty 1) https://stackoverflow.com/questions/18215973/how-to-check-if-running-as-root-in-a-bash-script – Barmar Jan 12 '21 at 16:26

Set sticky bit permission using bash script

1 Answers1

Simply

But as this question is tagged bash: