SIGCHLD trace problem Post: 302239195

10 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. UNIX for Advanced & Expert Users

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

3. 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...

4. Programming

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...

5. 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...

6. 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

7. 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,

8. Solaris

Log Trace

Hi I would like to display only error messages from my log files while monotring application on my solaris box using tail command. Is there other way we can monitor please let me know? In general # tail -f "xyz.log' ---> this will display current activity of the logs, instead i would like...

9. 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....

10. 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 PHP

ntp-wait

ntp-wait(1)							   User Commands						       ntp-wait(1)

NAME

       ntp-wait - Wait for ntpd to stabilize the system clock

SYNOPSIS

       ntp-wait [-flags] [-flag [value]] [--option-name[[=| ]value]]

       All arguments must be options.

DESCRIPTION

       ntp-wait will send at most num-tries queries to ntpd(8), sleeping for secs-between-tries after each status return that says ntpd(8) has not
       yet produced a synchronized and stable system clock.

       ntp-wait will do this quietly, unless the -v flag is provided.  This can be useful at boot time, to delay the  boot  sequence  until  after
       ntpd -g has set the time.

OPTIONS

       -n number, --tries=number
	      Number of times to check ntpd.  This option takes an integer number as its argument.  The default number for this option is:
		   100

		      The maximum number of times we will check ntpd to see if
		      it has been able to synchronize and stabilize the system clock.

       -s secs-between-tries, --sleep=secs-between-tries
	      How  long  to  sleep  between  tries.  This option takes an integer number as its argument.  The default secs-between-tries for this
	      option is:
		   6

		      We will sleep for secs-between-tries after each query
		      of ntpd that returns "the time is not yet stable".

       -v, --verbose
	      Be verbose.

		      By default, ntp-wait is silent.
		      With this option, ntp-wait will provide status information.

       -?, --help
	      Display usage information and exit.

       -!, --more-help
	      Pass the extended usage information through a pager.

       -v [{v|c|n --version [{v|c|n}]}]
	      Output version of program and exit.  The default mode is `v', a simple version.  The `c' mode will print copyright  information  and
	      `n' will print the full copyright notice.

EXIT STATUS

       One of the following exit values will be returned:

       0  (EXIT_SUCCESS)
	      Successful program execution.

       1  (EXIT_FAILURE)
	      The operation failed or the command syntax was not valid.

       70  (EX_SOFTWARE)
	      libopts had an internal operational error.  Please report it to autogen-users@lists.sourceforge.net.  Thank you.

AUTHORS

       Harlan Stenn

NOTES

       This document corresponds to version 4.2.8p13 of NTP.

       This manual page was AutoGen-erated from the ntp-wait option definitions.

ntp (4.2.8p13)							    20 Feb 2019 						       ntp-wait(1)