Get the pid of the process running in the background

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1

If i got a piece of code:

system(“cp -vcLR /source /destination &”);

it spaws a shell and running it in the background. how can i get the PID of
it??

2

ran zhang <rzhang@vamcointernational.com> wrote:

If i got a piece of code:

system(“cp -vcLR /source /destination &”);

it spaws a shell and running it in the background. how can i get the PID of
it??

You don’t.

If you need the pid of the “cp” command, don’t use system() – system()
starts a process (/bin/sh) which runs the command, then exits. You’re
starting two processes when you only need one.

Try:

pid = spawnl( P_NOWAIT, “/bin/cp”, “cp”, “-vcLR”, “/source”,
“/destination”, NULL );

-David

QNX Training Services
dagibbs@qnx.com