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I'm running a terminal application via "su" in this fashion:

su -c "/path/to/app --args" username

This is done from a root context, and 'username' is a less privileged user in the system. The application has signal handlers for CTRL-C and CTRL-Z (SIGINT and SIGTSTP, respectively). One odd problem I've come across is that CTRL-Z does not appear to propagate to the application when run via 'su' in this fashion. If I remove the 'username' from the end of the command above, then it works fine. Only when there is a user switch using su does this signal not work.

Is there a way to allow TSTP to propagate through to a program being executed as a different user?

Tested using CentOS 6.4; GNU Coreutils 8.4

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    Seems to me that a better solution might be to use sudo instead of su. – mdpc Dec 1 '14 at 22:40
  • 'sudo -u username /path/to/app --args' does indeed work. IMO this answers the question, so please submit and I will accept it. – KyleL Dec 2 '14 at 15:10
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Using 'sudo' instead of 'su' solved the problem, as suggested by mdpc.

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