What is the difference between these settings? $SIG{CHLD} = 'IGNORE' $SIG{CHLD} = 'DEFAULT' $SIG{CHLD} = '' $SIG{CHLD} = undef According to "Advanced Programming in the UNIX Environment, 2nd ...

I've got a program with a specialized Process-type class which handles executing the processes natively on Linux. It does not use Java's Process class at all, because it needs to do some special ...

I'm writing a debugging utility, and I want to fork a child while preventing that child's termination from triggering a SIGCHLD to its parent. I still want other children to normally cause a SIGCHL...

In Unix, when a child process in background terminates, it sends a SIGCHLD signal to the parent to inform it that it terminated. Does the same happen even if the process was in foreground? If so, ...

Here's a sample code where a shell script launches a few jobs in the background and upon receiving the CHLD signal (i.e. the child process termination) it will take some actions... The problem is t...

I'm currently in the process of writing a shell. I execute processes and utilize a SIGCHLD signal handler to clean up (wait on them) when they are complete. Everything has been working -- except w...

I need to handle SIGCHLD properly. How can I use it with my existing code? at the moment I cant wait for the child process unless I use 0 instead of WNOHANG|WUNTRACED. status = 0; pid_t child, e...

I've seen monitoring programs either in scripts that check process status using 'ps' or 'service status(on Linux)' periodically, or in C/C++ that forks and wait on the process... I wonder if it i...