GETPID(2) |
FreeBSD System Calls Manual |
GETPID(2) |
NAME
getpid,
getppid —
get parent or calling process identification
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include < sys/types.h>
#include < unistd.h>
pid_t
getpid( void);
pid_t
getppid( void);
DESCRIPTION
The
getpid() 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.
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.