Messages in this thread | | | Date | Tue, 18 Dec 2001 02:14:07 +0100 | From | Kurt Roeckx <> | Subject | wait() and strace -f |
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I got a weird problem here. I have a process that creates 2 childs, the first one dies very fast before the parent can call wait(). When I strace -f this wait() doesn't clean up the zombie as it should.
Note that this problem only happens when I have 2 childeren, use strace -f, and call wait after the first child died. Just strace, without strace, only 1 child, or call wait() after the child died doesn't seem to cause the problem.
Btw, this is with 2.4.16.
Simple program to demostrate it:
int main() { int i;
if (!fork()) { /* Child 1. */ return 0; }
if (!fork()) { /* Child 2. */ sleep(10); return 0; }
/* Parent. */ sleep(1); wait(&i); return 0; }
Without strace -f, this program stops after 1 second and the second child still lives for 9 seconds. With strace -f this program stops after 10 second after the second child died.
I think it's related to strace being the "real" parent of the child. But that doesn't really explain why I need 2 childs.
Kurt
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