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Man Pages


Manual Reference Pages  -  GETSID (2)

NAME

getsid - get process session

CONTENTS

Library
Synopsis
Description
Return Values
Errors
See Also
History

LIBRARY


.Lb libc

SYNOPSIS


.In unistd.h pid_t getsid pid_t pid

DESCRIPTION

The session ID of the process identified by pid is returned by getsid. If pid is zero, getsid returns the session ID of the current process.

RETURN VALUES

Upon successful completion, the getsid system call returns the session ID of the specified process; otherwise, it returns a value of -1 and sets errno to indicate an error.

ERRORS

The getsid system call will succeed unless:
[ESRCH]
  if there is no process with a process ID equal to pid.

Note that an implementation may restrict this system call to processes within the same session ID as the calling process.

SEE ALSO

getpgid(2), getpgrp(2), setpgid(2), setsid(2), termios(4)

HISTORY

The getsid system call appeared in
.Fx 3.0 . The getsid system call is derived from its usage in AT&T V .
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