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
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.