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Old 03-17-2017, 04:09 PM   #1
serafean
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man:systemd.service ExecStart=@ prefix - what does it do?


Hi,

I'm reading the systemd.service man page, and can't figure out what this part of the ExecStart description means :
Quote:
For each of the specified commands, the first argument must be an absolute path to an executable. Optionally, if this file name is prefixed with "@", the second token will be passed as "argv[0]" to the executed process, followed by the further arguments specified.
And even less how to use it.

Any ideas?

Thanks.

Last edited by serafean; 03-17-2017 at 04:22 PM. Reason: clarify title
 
Old 03-17-2017, 05:04 PM   #2
ondoho
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i think argv[0] is the same as $0 on a shell; it is the name of the program being executed.
so you could tell the program defined by execstart that it runs under a different name?
i know this can be useful at times.
 
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Old 03-19-2017, 05:52 AM   #3
serafean
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Thanks! I was confused about changing only the name part.
Could you please give an example of when it could be useful? I can't come up with any.

Thanks.
 
Old 03-19-2017, 06:01 AM   #4
ondoho
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here you are:
Quote:
Originally Posted by man rofi
DMENU REPLACEMENT
If argv[0] (calling command) is dmenu, rofi will start in dmenu mode. This way it can be
used as a drop-in replacement for dmenu. just copy or symlink rofi to dmenu in $PATH.

ln -s /usr/bin/rofi /usr/bin/dmenu
 
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