Re^4: Ulimit makes program hang

After insterting sleep before shelling out I get exactly same results.

I'm not a system programmer to analyse strace output...sorry.

I have tried fork and exec this way:

#!/usr/bin/perl -w

my $x = $ARGV[0] + 1;
print STDERR "$x\n";

if (!defined($child_pid = fork())) {
    die "cannot fork: $!";
} elsif ($child_pid) {
    waitpid($child_pid, 0);
} else {
    exec "$0 $x";
}
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This program never hangs -- always says cannot fork: Resource temporarily unavailable at ./fork_wait line 7.
But I must grab output of command so I can't use this solution.

Comment on Re^4: Ulimit makes program hang Download Code

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Re^5: Ulimit makes program hang by Bloodnok (Vicar) on Aug 13, 2008 at 16:50 UTC
...as I suspected, using the evidence of your OP and this posting, I think you've got enough to raise a perl bug against the backtick (``) operator - I think it should `die` with a similar fatal error. Section 16 of the Perl Cookbook should provide you with some background in order to progress further with capturing output from a command ... HTH , A user level that continues to overstate my experience :-))	[reply] [d/l] [select]

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Re^5: Ulimit makes program hang
by Bloodnok (Vicar) on Aug 13, 2008 at 16:50 UTC

die

Section 16 of the Perl Cookbook should provide you with some background in order to progress further with capturing output from a command ...

HTH ,

A user level that continues to overstate my experience :-))

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