Section: GNU Awk Extension Modules (3am)
Updated: Jan 15 2013Index
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fork, wait, waitpid - basic process management
pid = fork()
ret = waitpid(pid)
ret = wait();
extension adds three functions, as follows.
This function creates a new process. The return value is the zero
in the child and the process-id number of the child in the parent,
or -1 upon error. In the latter case,
indicates the problem.
In the child, PROCINFO["pid"] and PROCINFO["ppid"]
are updated to reflect the correct values.
This function takes a numeric argument, which is the process-id to
wait for. The return value is that of the
This function waits for the first child to die.
The return value is that of the
# .SH NOTES
There is no corresponding
The interfaces could be enhanced to provide more facilities,
including pulling out the various bits of the return status.
if ((pid = fork()) == 0)
print "hello from the child"
print "hello from the parent"
GAWK: Effective AWK Programming
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