I've got a script I want to require b开发者_Python百科e run with su privileges, but the interesting scripted command that will fail comes very late in the script, so I'd like a clean test up front to determine if the scrip will fail without SU capabilities.
What is a good way to do this for bash, sh, and/or csh?
bash/sh:
#!/usr/bin/env bash
# (Use #!/bin/sh for sh)
if [ `id -u` = 0 ] ; then
echo "I AM ROOT, HEAR ME ROAR"
fi
csh:
#!/bin/csh
if ( `id -u` == "0" ) then
echo "I AM ROOT, HEAR ME ROAR"
endif
You might add something like that at the beginning of your script:
#!/bin/sh
ROOTUID="0"
if [ "$(id -u)" -ne "$ROOTUID" ] ; then
echo "This script must be executed with root privileges."
exit 1
fi
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