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DaggyStyle
Watchman
Joined: 22 Mar 2006
Posts: 5929
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 Posted: Wed Oct 23, 2024 8:01 am Post subject: passing params to su in a script fails [solved] |
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Greetings,
I'm working on a script that gets run as root and run it as other users with params, this is the script:
| Code: | #!/bin/bash -x
do_virsh() {
local uri=$1
su -l -c "LC_ALL=C virsh -c ${uri} $@ 2>/dev/null | head -n -1" ${user}
}
test1() {
local uri=$1
shift
do_virsh "${uri}" list --uuid $@ | grep -v 00000000-0000-0000-0000-000000000000
}
for uri in {qemu:///system,qemu:///session}; do
users=root
[ "${uri}" = "qemu:///session" ] && users=dagg
for user in ${users}; do
export user
test1 ${uri} "--persistent"
done
done
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when I run it I get this:
| Code: |
+ for uri in {qemu:///system,qemu:///session}
+ users=root
+ '[' qemu:///system = qemu:///session ']'
+ for user in ${users}
+ export user
+ test1 qemu:///system --persistent
+ local uri=qemu:///system
+ shift
+ do_virsh qemu:///system list --uuid --persistent
+ local uri=qemu:///system
+ su -l -c 'LC_ALL=C virsh -c qemu:///system qemu:///system' list --uuid '--persistent 2>/dev/null | head -n -1' root
+ grep -v 00000000-0000-0000-0000-000000000000
su: unrecognized option '--uuid'
Try 'su --help' for more information.
+ for uri in {qemu:///system,qemu:///session}
+ users=root
+ '[' qemu:///session = qemu:///session ']'
+ users=dagg
+ for user in ${users}
+ export user
+ test1 qemu:///session --persistent
+ local uri=qemu:///session
+ shift
+ do_virsh qemu:///session list --uuid --persistent
+ local uri=qemu:///session
+ su -l -c 'LC_ALL=C virsh -c qemu:///session qemu:///session' list --uuid '--persistent 2>/dev/null | head -n -1' dagg
+ grep -v 00000000-0000-0000-0000-000000000000
su: unrecognized option '--uuid'
Try 'su --help' for more information.
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any ideas how to pass the params correctly without using sed or switching to other utils such as sudo or doas?
_________________
Only two things are infinite, the universe and human stupidity and I'm not sure about the former - Albert Einstein
Last edited by DaggyStyle on Wed Oct 23, 2024 10:09 am; edited 1 time in total |
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DaggyStyle
Watchman
Joined: 22 Mar 2006
Posts: 5929
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| Posted: Wed Oct 23, 2024 10:09 am Post subject: |
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after long search and trying, this works:
| Code: | do_virsh() {
local uri=$1
shift
su -f ${user} -s /bin/bash << EOS
LC_ALL=C virsh -c ${uri} $@ 2>/dev/null | head -n -1
EOS
} |
_________________
Only two things are infinite, the universe and human stupidity and I'm not sure about the former - Albert Einstein |
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Hu
Administrator
Joined: 06 Mar 2007
Posts: 22728
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| Posted: Wed Oct 23, 2024 1:43 pm Post subject: |
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"$@" expands to the arguments as individual words, which in the first script allowed them to leak out and become visible to su. Fortunately, the arguments meant for virsh confused su into failing, rather than doing the wrong thing. Piping is probably fine here. Another option would have been to use $* instead of $@.
You don't need to export user, since you only use it as an in-process variable later. |
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