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Top Forums Shell Programming and Scripting Linux csh script going to Suspended (tty output) when running with & (bg) Post 302912338 by Corona688 on Thursday 7th of August 2014 11:48:43 AM
Old 08-07-2014
If a background process tries to read from the terminal, it will be stopped. This is normal terminal and shell behavior. Only foreground processes are allowed to control the terminal like that.

To prevent it from reading from the terminal, run it with nohup to prevent it from accessing the terminal. This will redirect stdin/stdout/stderr automatically. stdin will connect to /dev/null, while stdout and stderr will be saved to a file in the current directory.

Code:
nohup run_server.csh

 

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NICE(1) 						      General Commands Manual							   NICE(1)

NAME
nice, nohup - run a command at low priority (sh only) SYNOPSIS
nice [ -number ] command [ arguments ] nohup command [ arguments ] DESCRIPTION
Nice executes command with low scheduling priority. If the number argument is present, the priority is incremented (higher numbers mean lower priorities) by that amount up to a limit of 20. The default number is 10. The super-user may run commands with priority higher than normal by using a negative priority, e.g. `--10'. Nohup executes command immune to hangup and terminate signals from the controlling terminal. The priority is incremented by 5. Nohup should be invoked from the shell with `&' in order to prevent it from responding to interrupts by or stealing the input from the next per- son who logs in on the same terminal. FILES
nohup.out standard output and standard error file under nohup SEE ALSO
csh(1), setpriority(2), renice(8) DIAGNOSTICS
Nice returns the exit status of the subject command. BUGS
Nice and nohup are particular to sh(1). If you use csh(1), then commands executed with ``&'' are automatically immune to hangup signals while in the background. There is a builtin command nohup which provides immunity from terminate, but it does not redirect output to nohup.out. Nice is built into csh(1) with a slightly different syntax than described here. The form ``nice +10'' nices to positive nice, and ``nice -10'' can be used by the super-user to give a process more of the processor. 4th Berkeley Distribution May 8, 1986 NICE(1)
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