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GETPID, GETPPID - reference manual online

Get parent or calling process identification.

Chapter
November 2, 2006
GETPID(2)                            BSD 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.
SEE ALSO fork(2), getpgrp(2), kill(2), setpgid(2), setsid(2), exec(3)
STANDARDS The getpid() and getppid() system calls are expected to conform to ISO/IEC 9945-1:1990 (“POSIX.1”).
HISTORY The getpid() function appeared in Version 7 AT&T UNIX.
BSD November 2, 2006 BSD
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getpid(2freebsd) referred by
refer to exec(3) | fork(2) | getpid(2) | kill(2) | mkstemp(3) | setpgid(2) | setsid(2)