NAME
getpid,
getppid —
get
parent or calling process identification
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
pid_t
getpid(
void);
pid_t
getppid(
void);
DESCRIPTION
getpid() returns the process ID of the calling process. The ID
is guaranteed to be unique and is useful for constructing temporary file
names.
getppid() returns the process ID of the parent of the calling
process.
ERRORS
The
getpid() and
getppid() 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 1003.1-1990 (“POSIX.1”).
HISTORY
The
getpid() function appeared in
Version 5 AT&T UNIX.