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Operating Systems Linux Red Hat Nohup with ampersand & process gets disconnected Post 303033345 by Corona688 on Wednesday 3rd of April 2019 05:02:18 PM
Old 04-03-2019
If these programs are opening /dev/tty by themselves, nohup can't stop them from getting the boot. Running from crontab they wouldn't, as opening /dev/tty wouldn't get anything anyway.

I'd be really curious what file descriptors you find open in all PID's owned by you after you do a nohup ./script & disown ; exit, visible in /proc/####/fd. If some database client is grabbing /dev/tty maybe it can be convinced not to do so with a commandline switch.

There's also the "at" daemon if you have it, a kind of cron equivalent for one time tasks which lets you specify something to run at a time in the future.

Last edited by Corona688; 04-03-2019 at 06:08 PM..
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SHOWCONSOLE(8)						       The SuSE boot concept						    SHOWCONSOLE(8)

NAME
Showconsole - determines the underlying tty of stdin Setconsole - sets the underlying tty of /dev/console SYNOPSIS
showconsole [-n] setconsole /dev/tty<xy> < /dev/console DESCRIPTION
showconsole determines the underlying character device of the current stdin. This can be used on /dev/console as current character device to get the real character device back. setconsole sets the underlying tty of the system console /dev/console. This requires that the standard input is identical with /dev/con- sole and exactly one argument, a valid character device is given. OPTIONS
-n Return the major and minor device numbers instead of the device file name. This can be used to asked the kernel for the major and minor device numbers of a not existing device file in /dev. BUGS
showconsole needs a mounted /proc file system and tries to set the controlling tty to stdin if no controlling tty is found. After reading /proc the status of the controlling tty is restored to avoid problems with getty processes. FILES
/proc/<pid of showconsole>/stat the stat file of the showconsole process. /dev/console the system console. SEE ALSO
blogd(8), console(4), tty(4), proc(5). COPYRIGHT
2000 Werner Fink, 2000 SuSE GmbH Nuernberg, Germany. AUTHOR
Werner Fink <werner@suse.de> 3rd Berkeley Distribution Nov 10, 2000 SHOWCONSOLE(8)
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