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Full Discussion: the parent receive SIGTERM from its child (httpd) ?
Top Forums Programming the parent receive SIGTERM from its child (httpd) ? Post 302222568 by aaronwong on Thursday 7th of August 2008 03:37:19 AM
Old 08-07-2008
Question the parent receive SIGTERM from its child (httpd) ?
the parent is a process manager in our design, and httpd service is one of its child processes, which is started in foreground mode (with "-D FOREGROUND" options) according to our requirements.

when httpd service is started, one main httpd process and eight sub httpd processes can be found by "ps -ef | grep httpd". (the eight sub httpd processes are child processes of this main httpd process)

The problem is that:
-> if use "kill pid_of_httpd" to kill the main httpd process, its parent(the process manager) receives SIGTERM from it, but not SIGCHLD, which is unexpected.
-> if use "kill -9 pid_of_httpd" to kill the main httpd process, its parent receives SIGCHLD from it, which is expected.

Can anybody tell me why? Or is there any method to make httpd send SIGCHLD but not SIGTERM to its parent when killed by "kill pid_of_httpd"?

Thanks in advance !
 

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LEARN ABOUT LINUX

git-instaweb

GIT-INSTAWEB(1) 						    Git Manual							   GIT-INSTAWEB(1)

NAME

       git-instaweb - Instantly browse your working repository in gitweb

SYNOPSIS

       git instaweb [--local] [--httpd=<httpd>] [--port=<port>]
		      [--browser=<browser>]
       git instaweb [--start] [--stop] [--restart]

DESCRIPTION

       A simple script to set up gitweb and a web server for browsing the local repository.

OPTIONS

       -l, --local
	   Only bind the web server to the local IP (127.0.0.1).

       -d, --httpd
	   The HTTP daemon command-line that will be executed. Command-line options may be specified here, and the configuration file will be
	   added at the end of the command-line. Currently apache2, lighttpd, mongoose, plackup and webrick are supported. (Default: lighttpd)

       -m, --module-path
	   The module path (only needed if httpd is Apache). (Default: /usr/lib/apache2/modules)

       -p, --port
	   The port number to bind the httpd to. (Default: 1234)

       -b, --browser
	   The web browser that should be used to view the gitweb page. This will be passed to the git web--browse helper script along with the
	   URL of the gitweb instance. See git-web--browse(1) for more information about this. If the script fails, the URL will be printed to
	   stdout.

       start, --start
	   Start the httpd instance and exit. Regenerate configuration files as necessary for spawning a new instance.

       stop, --stop
	   Stop the httpd instance and exit. This does not generate any of the configuration files for spawning a new instance, nor does it close
	   the browser.

       restart, --restart
	   Restart the httpd instance and exit. Regenerate configuration files as necessary for spawning a new instance.

CONFIGURATION

       You may specify configuration in your .git/config

	   [instaweb]
		   local = true
		   httpd = apache2 -f
		   port = 4321
		   browser = konqueror
		   modulepath = /usr/lib/apache2/modules

       If the configuration variable instaweb.browser is not set, web.browser will be used instead if it is defined. See git-web--browse(1) for
       more information about this.

SEE ALSO

       gitweb(1)

GIT

       Part of the git(1) suite

Git 1.8.5.3							    01/14/2014							   GIT-INSTAWEB(1)
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