NAME

getpid, getppid — get parent or calling process identification

SYNOPSIS

#include <unistd.h>

pid_t
getpid(void);

pid_t
getppid(void);

DESCRIPTION

getpid() returns the process ID of the calling process. Though the ID is guaranteed to be unique, it should NOT be used for constructing temporary file names; see mkstemp(3) instead.

getppid() returns the process ID of the parent of the calling process.

RETURN VALUES

These functions are always successful, and no return value is reserved to indicate an error.

SEE ALSO

gethostid(3)

STANDARDS

getpid() and getppid() conform to IEEE Std 1003.1-2008 (“POSIX.1”).