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Command: getpid | Section: 2 | Source: OpenBSD | File: getpid.2
GETPID(2) FreeBSD System Calls Manual GETPID(2)
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").
HISTORY
The getpid() system call first appeared in Version 5 AT&T UNIX. The
getppid() function appeared in Version 7 AT&T UNIX/32V.
FreeBSD 14.1-RELEASE-p8 December 30, 2022 FreeBSD 14.1-RELEASE-p8