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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 MOJAVE

nohup

NOHUP(1)						    BSD General Commands Manual 						  NOHUP(1)

NAME

     nohup -- invoke a utility immune to hangups

SYNOPSIS

     nohup [--] utility [arguments]

DESCRIPTION

     The nohup utility invokes utility with its arguments and at this time sets the signal SIGHUP to be ignored.  If the standard output is a ter-
     minal, the standard output is appended to the file nohup.out in the current directory.  If standard error is a terminal, it is directed to
     the same place as the standard output.

     Some shells may provide a builtin nohup command which is similar or identical to this utility.  Consult the builtin(1) manual page.

ENVIRONMENT

     The following variables are utilized by nohup:

     HOME  If the output file nohup.out cannot be created in the current directory, the nohup utility uses the directory named by HOME to create
	   the file.

     PATH  Used to locate the requested utility if the name contains no '/' characters.

EXIT STATUS

     The nohup utility exits with one of the following values:

     126     The utility was found, but could not be invoked.

     127     The utility could not be found or an error occurred in nohup.

     Otherwise, the exit status of nohup will be that of utility.

SEE ALSO

     builtin(1), csh(1), signal(3)

STANDARDS

     The nohup utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.

BUGS

     Two or more instances of nohup can append to the same file, which makes for a confusing output.

BSD
								   July 19, 2001							       BSD