NAME
getpid, getppid
— get parent or calling process
identification
LIBRARY
library “libc”
SYNOPSIS
#include
<sys/types.h>
#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, for security reasons; see
mkstemp(3) instead.
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
STANDARDS
The getpid() and
getppid() function calls are expected to conform to
IEEE Std 1003.1-1990 (“POSIX.1”).
HISTORY
A getpid() function call appeared in
Version 7 AT&T UNIX.