Re^2: Running a process in the background

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Re^3: Running a process in the background by tstock (Curate) on Nov 23, 2004 at 22:29 UTC
`if (my $pid = fork) { # parent ($pid is process id of child) parent_function(); } else { # child child_function(); exit; }` [download] Feel free to read perldoc -f fork, and look at some examples online. This is not really advanced perl, but it requires some attention.	[reply] [d/l]
Re^4: Running a process in the background by thor (Priest) on Nov 23, 2004 at 22:39 UTC
From personal experience, the `exit` is key. Let's just say that I'm glad that I had my own Sun workstation when I started experimenting with `fork`...coughfork bombcough thor `Feel the white light, the light within Be your own disciple, fan the sparks of will For all of us waiting, your kingdom will come`	[reply]
Re^4: Running a process in the background by binary (Novice) on Nov 23, 2004 at 23:05 UTC
Hello, Remember to check for a fork error after forking: `if (my $pid = fork) { ## Parent } elsif ($pid == 0) { ## Child } else { ## Error, $pid is undefined }` [download]	[reply] [d/l]
Re^5: Running a process in the background by Joost (Canon) on Nov 23, 2004 at 23:43 UTC
`undef == 0` - use `defined` instead: `if (my $pid = fork) { ## Parent } elsif (defined $pid) { ## Child } else { ## Error, $pid is undefined }` [download] "What should it profit a man, if he should win a flame war, yet lose his cool?"	[reply] [d/l] [select]