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Hi, I have an application that I run on a
TS7260 that I'd like to be able to start and stop via calling a URL on
the 7260's webserver. The application and its
libraries write to stderr and stdout. When I launch the it from
/etc/init.d during bootup, I background it and redirect stdout and
stderr to syslog fromt the init bash script. $PGMPATH/$PGM 2>&1 | logger & That
all works perfectly. But if I call this same script from cgi-bin via
apache (parsing QUERY_STRING for the start/stop arguments instead), the
program launches in the background properly. The bash/cgi-script
executes completely (I print out a "DONE" message at the end), but the
script remains behind as a zombie process.
Apache also keeps that process alive --
firefox never shows the connection as completed, and the apache log
never records the GET in the syslog -- until I kill the backgrounded
daemon. I rebuilt my program as a true daemon
that forks/detaches and closes stderr/stdout, and the cgi-bin program
executes and exits properly -- I verified that it is the open file
handles to stderr/stdout that triggers the zombie problem in apache. So two questions: 1) Why does running the startup script from /etc/init.d not care about open file handles, but apache cgi-bin does? 2) Without
rebuilding all of my libraries to talk to syslog directly rather than
stderr/stdout, is there way to launch an application, background it and
redirect stderr/out to logger, minus the
zombies? Thanks! David__._,_.___
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