On Thu, Jun 24, 2010 at 4:15 AM, Hailiang Zhang <[email protected]> wrote: > Hi Tim: > > Thanks a lot for suggeting "exec" in my shell script. It really works > under both shell and PBS; however, the running was just terminated right > after "exec ${DIR}/lx_mapman" was excutated. I am not sure why this > happens:-(
Hailiang, I use PBS all the time and I have no trouble running scripts which are identical to those I run from the command line (in fact I usually test the script on the command line first before submitting it to the batch queue). I'm not clear why you thought it necessary to use the 'source' command (which as Tim pointed out only works for shell scripts, not for any kind of executable binary file). What happens if you use exactly the same command under PBS as you would from the command-line, i.e. in your example: ./lx_mapman The 'exec' command you used is doing exactly what it was designed to do, i.e. it replaces the current shell with the command specified by exec, i.e. it's designed for 'chaining' a series of scripts or executables. This of course means that any subsequent commands in the shell script containing the 'exec' are ignored, so it only makes sense to use 'exec' if it's the last command in a script. But in your example use of 'exec' should be unnecessary anyway. Hope this helps! -- Ian
