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Problem executing nohup

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Top Forums Shell Programming and Scripting Problem executing nohup
# 1  
Old 12-01-2005
Data Problem executing nohup
I am trying to submit background jobs using the nohup command on a client system where my session is running under a "master shell" (BASH). If I try to nohup the actual job (ie: nohup MYJOB.BAT > MYJOB.LOG 2>&1 &) the command will fail with a return code of 126 and a "permission denied" message. However, if I submit the job without nohup, then nohup the process id, it will work.

In other words, I submit the job without nohup:

. MYJOB.BAT > MYJOB.LOG 2>&1 & (the ". " is required because I'm running under the master shell script)

I then obtain the process-id, which we'll say is 12345, and nohup the process:

nohup -p -Fa 12345

this will send the no hangup signal to the process successfully.

Does anyone have an idea as to why the nohup will operate on the process id but not the job itself? I know it's not related to nohup.out since I'm redirecting all messages to MYJOB.LOG. Unfortunately, this client is located halfway around the world and technical support is limited to say the least, so I'm not sure what is going on with this "master shell".

Thanks for your help!
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LEARN ABOUT LINUX

nohup

NOHUP(1)							   User Commands							  NOHUP(1)

NAME

       nohup - run a command immune to hangups, with output to a non-tty

SYNOPSIS

       nohup COMMAND [ARG]...
       nohup OPTION

DESCRIPTION

       Run COMMAND, ignoring hangup signals.

       --help display this help and exit

       --version
	      output version information and exit

       If  standard  input is a terminal, redirect it from /dev/null.  If standard output is a terminal, append output to `nohup.out' if possible,
       `$HOME/nohup.out' otherwise.  If standard error is a terminal, redirect it to standard output.  To save output to FILE, use `nohup  COMMAND
       > FILE'.

       NOTE: your shell may have its own version of nohup, which usually supersedes the version described here.  Please refer to your shell's doc-
       umentation for details about the options it supports.

AUTHOR

       Written by Jim Meyering.

REPORTING BUGS

       Report nohup bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>
       Report nohup translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2010 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The full documentation for nohup is maintained as a Texinfo manual.  If the info and nohup programs are properly installed  at  your  site,
       the command

	      info coreutils 'nohup invocation'

       should give you access to the complete manual.

GNU coreutils 8.5						   February 2011							  NOHUP(1)