01-21-2005
Again, please post your OS and version, and the output of the following command:
$ which nohup
This will assist in getting you a answer. Since you seem to insist that /opt/user/nohup is a file on your server, please also post the output of these commands:
$ file /opt/user/nohup
$ ls -l /opt/user/nohup
I have reason to believe you are incorrect in using ${HOME}/nohup in the second script - I'm not sure why there would be a script or executable called nohup as this would be against most rules of programming (naming a script the same as a command). The first script seems to have the syntax correct:
su - username -c "nohup /opt/user/scripts/test.sh &"
since running a nohup command is done like that, and added to su - user would be correct. See the man page for su and nohup.
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LEARN ABOUT OPENDARWIN
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.
DIAGNOSTICS
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