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Author Message
 subprocess exits with status 2, and sh script stops
I'm writing a /bin/sh script that calls lynx to run a menu system.  If
lynx exits normall, the script continute, and if lynx exits with status
1, the script continues.  But if the user kill lynx with control-c, the
script that calls it dies.

How can I prevent this?

I've tried to rtfm, but I'm not as good as I'd like to be at finding
stuff like this.


 Wed, 24 Sep 1997 03:00:00 GMT   
 subprocess exits with status 2, and sh script stops

Try the following:


# ignore signal INT (#2),
# thus preventing the shell script from dying
# (typing the interrupt character sends the signal SIGINT to
# all processes in the current foreground job's process
# group).

trap "" 2

# do something before call to lynx

# ...

# before calling lynx, install a trap for SIGINT, because
# keeping it being ignored would make lynx uninterruptible
# by SIGINT also.

trap ":" 2

# call lynx - because SIGINT is not ignored but caught,
# lynx is interruptable by SIGINT look at manual page sh(1),
paragraph "Special Commands", command trap


# ignore SIGINT again

trap "" 2

# do something after lynx...

# ...

# end of script

Hope that helps.

Shalom, Friedhelm.

 Mon, 29 Sep 1997 03:00:00 GMT   
   [ 2 post ] 

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