getpid() -- System Call (libc)

Get process identifier
#include <unistd.h>
getpid()

Every process  has a unique  number, called its process  id. fork() returns
the process id of a created child process to the parent process.

getpid() returns  the process  id of  the requesting process.   Typically a
process uses getpid() to pass its process id to another process which wants
to send it a signal, or to generate a unique temporary file name.

Example

For an example of using this system call in a C program, see signal().

See Also

fork(),
getppid(),
kill,
libc,
mktemp,
unistd.h
POSIX Standard, §4.1.1

© 2012 by Stephen A. Ness