10-29-2002
ret val of a command in a pipe which is NOT the last one
hello dear UNIX gurus ;-)
my problem is one of those i would think that many others should also have had it in the past. but i cannot find any thread or other documentation about it.
inside a ksh script i have a pipe like this:
ksh -c "export LIBPATH=$LD_LIBRARY_PATH; ${Cmd} ${Param} 2>&1 | tee -a ${LogFile}"
now i need to return the return value of ${Cmd} to the caller. as everybody knows, the $? gives me the ret val of the tee call, which is not important here. nevetheless i want to use the tee feature here. many this-style pipes can be usefull.
i have tried workarounds with
[[ ! -r ${LogFile} ]] && touch ${LogFile}
tail -f ${LogFile} &
TAILPID=$!
ksh -c "export LIBPATH=$LD_LIBRARY_PATH; ${Cmd} ${Rest} >> ${LogFile} 2>&1"
RET=$?
sleep 5
kill -9 ${TAILPID} > /dev/null 2>&1
exit ${RET}
but i think there must be a better solution, maybe using file descriptors greater than2. but i did not succeed yet :-(
has anybody an idea?
this would be great
thank you all and bye bye
latze
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times(1) User Commands times(1)
NAME
times - shell built-in function to report time usages of the current shell
SYNOPSIS
sh
times
ksh
times
DESCRIPTION
sh
Print the accumulated user and system times for processes run from the shell.
ksh
Print the accumulated user and system times for the shell and for processes run from the shell.
On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not
performed.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
ksh(1), sh(1), time(1), attributes(5)
SunOS 5.10 15 Apr 1994 times(1)