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Question about system command in C

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# 15  
Old 03-17-2011
ok so then its like
is it waitpid(pid, NULL, 0); or waitpid(&status, NULL, 0);
Last edited by omega666; 03-17-2011 at 06:37 PM..
# 16  
Old 03-17-2011
No. sigaction takes three parameters, not two, and you forgot to save the old structures.

You should also use waitpid(), not wait(), or else you might end up waiting for the wrong child.
# 17  
Old 03-17-2011
i modified my previous post can u see if everything is ok
# 18  
Old 03-17-2011
You should also put the sigprocmask/sigaction resets in the { perror("fork failed"); exit(-1); } section, otherwise you won't reset them when fork throws an error. Otherwise, it looks OK now. Smilie
# 19  
Old 03-17-2011
ok i re-modified the previous post
# 20  
Old 03-17-2011
Looks very good now Smilie
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