Solved

Killing an exec'ed process

Posted on 2000-03-14
1
269 Views
Last Modified: 2010-04-21
I have installed a signal handler using sigaction to catch SIGTERM. However the main process vforks, and then execs a new process in the resulting child process.

Is there any way to kill that process which has been exec'ed ? From all the man pages, I know that the exec set of calls resets any signal's dispositions to their default handlers.

Any pointers ?
fstab.
0
Comment
Question by:fstab
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 14

Accepted Solution

by:
chris_calabrese earned 50 total points
ID: 2617356
Since you know the process number of the child from the return value of vfork(), you can send the child a SIGTERM.

The code would look something like this:

pid_t child_pid=-1;

....

child_pid=vfork();
if(child_pid == 0) {
    /* this is the child */
    execve(.....)
   ...
} else if(child_pid < 0) {
    /* an error occurred */
   perror(...)
   ...
}

....

void handler(int mysig) {
    ...
    if(child_pid > 0)
        kill(child_pid, mysig)
    ...
}

....

signal(SIGTERM, handler);

....
0

Featured Post

The Ultimate Checklist to Optimize Your Website

Websites are getting bigger and complicated by the day. Video, images, custom fonts are all great for showcasing your product/service. But the price to pay in terms of reduced page load times and ultimately, decreased sales, can lead to some difficult decisions about what to cut.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Attention: This article will no longer be maintained. If you have any questions, please feel free to mail me. jgh@FreeBSD.org Please see http://www.freebsd.org/doc/en_US.ISO8859-1/articles/freebsd-update-server/ for the updated article. It is avail…
I promised to write further about my project, and here I am.  First, I needed to setup the Primary Server.  You can read how in this article: Setup FreeBSD Server with full HDD encryption (http://www.experts-exchange.com/OS/Unix/BSD/FreeBSD/A_3660-S…
Learn how to get help with Linux/Unix bash shell commands. Use help to read help documents for built in bash shell commands.: Use man to interface with the online reference manuals for shell commands.: Use man to search man pages for unknown command…
Learn how to find files with the shell using the find and locate commands. Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:

688 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question