Who sent the process SIGCHLD ?

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1. UNIX for Dummies Questions & Answers

using SIGCHLD

I'm testing out how to use SIGCHLD and I had a question about intercepting the signal and executing an action in the signal handler. signal(SIGCHLD,countdown); What I'm trying to achieve is be able to printf(Hello) every second that child is set to sleep. I'm setting sleep = 3; so...

2. Programming

SIGCHLD interrupts its own handler

Hi. I have a program whose job it is to manage 15 child processes. Sometimes these children die (sometimes deliberately other times with a SEGV). This causes a SIGCHLD to be sent to my program which uses waitpid() in the signal handler to gather information and, in most cases, restart the child....

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4. Programming

SIGCHLD trace problem

Hello, I'd like to know whether it is possible to let the parent know who kills its child process. The case is likely as below: if there are four processes, we call them A, B, C and D. B is the child of A, and can be killed by both C and D. if B is killed, then A will receive SIGCHLD from B....

5. UNIX for Dummies Questions & Answers

About SIGCHLD

When the SIGCHLD is sent? SIGCHLD is sent either a child exits spontaneously (e.g. exit(0)) or it is killed ? thank you in advance

6. Programming

adv reqd on SIGCHLD on accept call

Hi, I have small problem. In my (concurrent)server programm, I am handling accept problem from client like this. sample of server code. /*******************/ end = 0; while (! end ) { sockfd = accept(...) if(sockfd == -1) { if (errno == EINTR) /* this is bcoz...

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When is SIGCHLD is raised.

Hi, I have 2 processes X and Y. Y is exec() from X. In Y i have an exit handler, which is called when i return from main. With in exit handler i delete and object which in turn calls the destructor of the object, which terminates all the threads of Y. I believe that SIGCHLD is raised by Y as...

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signal handler for SIGCHLD

Hi, I have an c++ application which uses the function fork and execvp(). The parent does not wait until the child ends. The parents just creates children and let them do their stuff. You can see the parent program as a batch-manager. I have added a SIGCHLD handler to the program: void...

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catch SIGCHLD signal in parent process

I want to catch SIGCHLD signal in parent process. I can't use wait() system call to catch SIGCHLD according to project requirment. Operating system linux 3.1 can any one have a solution for this. Thanking you, ranjan

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Need help with SIGCHLD

Hello everybody, this is my first post on this forum. I have a program that has a child process that sleeps for 5 second and exit. I'm suppose to modify this program so that when the child exits, the parent reports the exit status of the child, so I also have to deal with SIGINT and SIGQUIT. Can...

UNIX for Dummies Questions & Answers