Manual Pages  — GETPID

getpid, getppid – get parent or calling process identification

LIBRARY SYNOPSIS DESCRIPTION ERRORS SEE ALSO STANDARDS HISTORY

Standard C Library (libc, -lc)

#include <unistd.h>

pid_t
getpid(void);

pid_t
getppid(void);

The getpid() and getppid() system calls are always successful, and no return value is reserved to indicate an error.

The getpid() and getppid() system calls are expected to conform to IEEE Std 1003.1-90 ("POSIX.1").

The getpid() function appeared in AT&T v7 .