Re: Program ends, no messages, logs, etc -- C400-L

On 02/06/2004, at 12:51 AM, Walt Fles wrote:

I realize that calling using system() is not the way to go. I am not concerned with the performance impact from using spawn(), but what I am having trouble doing is using spawn to call commands or programs. I do not want to ahve to code the spawn call such that I need to give it the fully qualified path such as: /qsys.lib/alib.lib/apgm.pgm.

Ensure the environment variable PATH contains %LIBL% and that it is inherited by the spawned job. You must use spawnp() to search PATH and you must pass the current environment to the spawned job.

Id like to figure out a way to invoke spawn to do things like:
dspusr usrprf(walt)

You can't do that directly. spawn() and spawnp() run programs, or scripts, not commands. You could spawn a program you wrote that accepted a command string as a parameter and passed that to system(). Note that you can only run commands with the *EXEC attribute.

and have this run as a job, and capture the return code. Also, Im still
trying to figure out how to invoke using spawn commands like:
call pgm(alib/apgm) parm('parm1' 'parm2'), etc.

o You set the current environment PATH to include %LIBL% (or build an array of environment strings specifically for the spawned job including PATH=%LIBL%) o You specify the program name in the first parameter of spawnp() o You specify parameters for the program as an array of null-terminated strings in the fifth parameter of spawnp(). o You specify the current environment pointer in the sixth parameter of spawnp() (or the pointer to the array of specific environment variables).

Is there some inheritance or environment setting I might be missing? I
already do a:
putenv("PATH=%LIBL%");
before my spawn, but I still get a spawn error stating that it cannot
find to execute what I sent to it.

Make sure you use spawnp() and that you pass the environment to the spawned job.

Any help or ideas would be most appreciated, thanks!

There is a SPAWNTOOL example in the QUSRTOOL library. This may help you. Even though you are having trouble, spawn works. The system uses it in lots of places and I use it successfully in a number of places.

Regards,
Simon Coulter.
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