GETPID(2,L)                 AIX Technical Reference                 GETPID(2,L)



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getpid, getpgrp, getppid



PURPOSE

Gets the process, process group, and parent process IDs.

SYNTAX

pid_t getpid ( )

pid_t getpgrp ( )

pid_t getppid ( )

DESCRIPTION

The getpid system call returns the process ID of the calling process.

The getpgrp system call returns the process group ID of the calling process.

The getppid system call returns the process ID of the calling process's parent
process.

If a parent process terminates without waiting for all of its child processes
to terminate, the remaining child processes become "orphans" and the parent
process ID of each remaining child process is set to -1.  However, in this
case, the getppid system call returns 1 to allow for POSIX conformance.

RELATED INFORMATION

In this book:  "exec:  execl, execv, execle, execve, execlp, execvp,"  "fork,
vfork,"  "setpgid, setpgrp, setsid," and "sigaction, sigvec, signal."




















Processed November 7, 1990        GETPID(2,L)                                 1