getpid, getppid -- get parent or calling process identification
Standard C Library (libc, -lc)
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)
The getppid() system call returns the process ID of the parent of the
The getpid() and getppid() system calls are always successful, and no
return value is reserved to indicate an error.
The getpid() and getppid() system calls are expected to conform to
ISO/IEC 9945-1:1990 (``POSIX.1'').
The getpid() function appeared in Version 7 AT&T UNIX.
FreeBSD 5.2.1 June 4, 1993 FreeBSD 5.2.1 [ Back ]