why the process cannot catch the HUP signal

alpinist_dou · 02-03-2010, 01:21 AM

i'm crazy for this problem.

i write one program,which can dynamiclly be configure by user,using signal SIGHUP.
if i start the program in console,it can works well.i.e,i send HUP signal to the process,it can be catched and load the configure file.

but,if the program is started from init shell script,in this way,the ppid of the program is 1,the process can not catch the HUP signal but other signal ,such as USR1,can be catched.

i don't know if i express clearly.i am not family with shell script.i don't know if it dues to starting from shell script.

can anyone help me?

TB0ne · 02-03-2010, 10:01 AM

Quote:

Originally Posted by alpinist_dou

i'm crazy for this problem.

i write one program,which can dynamiclly be configure by user,using signal SIGHUP.
if i start the program in console,it can works well.i.e,i send HUP signal to the process,it can be catched and load the configure file.

but,if the program is started from init shell script,in this way,the ppid of the program is 1,the process can not catch the HUP signal but other signal ,such as USR1,can be catched.

i don't know if i express clearly.i am not family with shell script.i don't know if it dues to starting from shell script.

can anyone help me?

Well, since you're not posting any of your program, shell-script, or giving us any details (like version/distro of Linux, etc.), it's doubtful. You don't even say what you've written this program IN, or what it does.