NAME
getpid, getppid
— get parent or calling process
identification
LIBRARY
library “libc”
SYNOPSIS
#include
<unistd.h>
pid_t
getpid(void);
pid_t
getppid(void);
DESCRIPTION
Thegetpid()
system call 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, for security reasons; see
mkstemp(3) instead.
The
getppid()
system call returns the process ID of the parent of the calling process.
ERRORS
The getpid() and
getppid() system calls are always successful, and no
return value is reserved to indicate an error.
SEE ALSO
fork(2), getpgrp(2), kill(2), setpgid(2), setsid(2), exec(3)
STANDARDS
The getpid() and
getppid() system calls are expected to conform to
IEEE Std 1003.1-1990 (“POSIX.1”).
HISTORY
The getpid() function appeared in
Version 7 AT&T UNIX.