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.\" $Id: pvm_catchout.3,v 1.1 1996/09/23 22:01:06 pvmsrc Exp $
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.\" $Id: pvm_catchout.3,v 1.2 2001/09/27 18:51:32 pvmsrc Exp $
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.TH CATCHOUT 3PVM "13 July, 1994" "" "PVM Version 3.4"
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pvm_catchout \- Catch output from child tasks.
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The routine \fIpvm_catchout\fR
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causes the calling task (the parent)
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to catch output from tasks spawned after the call to
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to catch output from any tasks spawned after the call to
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Characters printed on \fIstdout\fR or \fIstderr\fR in children tasks
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are collected by the pvmds
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and sent in control messages to the parent task,
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which tags each line and appends it to the specified file.
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Output from grandchildren (spawned by children) tasks
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provided the children don't reset \fIPvmOutputTid\fR.
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provided the children don't reset their \fIPvmOutputTid\fR.
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If option \fIPvmShowTids\fR (see \fIpvm_setopt\fR) is true (nonzero),
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output is printed as shown below,
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The output from each task includes one BEGIN line and one END
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The output from each task includes one BEGIN line and one END line,
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with whatever the task prints in between.
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If PvmShowTids is false,
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raw output is printed with no additional information.
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the output file descriptor may be specified.
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Giving a null pointer turns output collection off.
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Giving a null pointer turns output collection off
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for any subsequently spawned child tasks.
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(Any existing output collection will still proceed at the
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child tasks, until they exit or change their\fIPvmOutputTid\fR
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or related settings - see man page for pvm_setopt().)
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output collection can only be turned on or off,
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and is logged to stdout of the parent task.
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output collection can only be turned on or off (again only
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for subsequently spawned child tasks),
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and is always logged to the stdout of the parent task.
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If \fIpvm_exit\fR is called while output collection is in effect,
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it will block until all tasks sending it output
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in order to print all their output.
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it will block in order to print all the output,
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until all tasks sending the given task output have exited.
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output collection can be turned off by calling pvm_catchout(0)
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before calling pvm_exit.
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man/man3/pvm_catchout.3
