When is SIGCHLD is raised. Post: 87255

9 More Discussions You Might Find Interesting

1. Programming

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...

2. Programming

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...

3. 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

4. Shell Programming and Scripting

automatically answer a question raised by a command

i have installed vmware on a text base linux node now i have to vmware-configure.pl to do the initial configuration now 1st step it askes for agreeing for a " License Agreement" for that i have to say "q" and "yes" to Accept it i want to run a script with does these 3 steps...

5. UNIX for Dummies Questions & Answers

Who sent the process SIGCHLD ?

I want to know whicj process send the signal SIGCHLD to the parent's child. Thank you in advance,

6. 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....

7. Shell Programming and Scripting

Populating array raised an error

Hi, The following test case populate an array named: array3. Since array1 and array2 are equal in length and values array3 will remain empty. #!/usr/bin/ksh test() { set -A array1 "A" set -A array2 "A" NUM_1=`echo ${#array1}` print "num elenemt in NUM_1 is ${NUM_1}" i=1 for ELE2 in...

8. 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....

9. 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...

LEARN ABOUT DEBIAN

read_deallocate

read_allocate(3)						  Staden Package						  read_allocate(3)

NAME

       read_allocate, read_deallocate - Allocate and deallocate the Read structure.

SYNOPSIS

       #include <Read.h>

       Read *read_allocate(
	    int num_points,
	    int num_bases);

       void read_deallocate(
	    Read *read);

DESCRIPTION

       These  functions  create  and  destroy Read structures. The Read structure is a generalised in-memory data structure used for holding trace
       data information.

       read_allocate() creates a Read structure large enough to hold num_points trace sample points and num_bases called bases. The allocated data
       is then initialised to appropriate defaults, which are mainly zeros and null pointers.

       read_deallocate() destroys a previously created Read structure. It is not sufficient to simply use the free() call instead.

RETURN VALUES

       On  successful  completion,  the  read_allocate()  function  returns  a pointer to a Read structure. Otherwise this function returns a null
       pointer.

       The read_deallocate() function returns no value.

SEE ALSO

       read_reading(3), fread_reading(3), write_reading(3), fwrite_reading(3)

																  read_allocate(3)