2004-11-03 13:51:07 +00:00
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.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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2007-06-20 22:33:04 +00:00
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.TH "GETSID" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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2004-11-03 13:51:07 +00:00
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.\" getsid
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2007-09-20 06:03:25 +00:00
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.SH PROLOG
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This manual page is part of the POSIX Programmer's Manual.
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The Linux implementation of this interface may differ (consult
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the corresponding Linux manual page for details of Linux behavior),
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or the interface may not be implemented on Linux.
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2004-11-03 13:51:07 +00:00
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.SH NAME
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getsid \- get the process group ID of a session leader
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.SH SYNOPSIS
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.LP
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\fB#include <unistd.h>
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.br
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.sp
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pid_t getsid(pid_t\fP \fIpid\fP\fB); \fP
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\fB
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.br
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\fP
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.SH DESCRIPTION
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.LP
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The \fIgetsid\fP() function shall obtain the process group ID of the
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process that is the session leader of the process
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specified by \fIpid\fP. If \fIpid\fP is (\fBpid_t\fP)0, it specifies
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the calling process.
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.SH RETURN VALUE
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.LP
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Upon successful completion, \fIgetsid\fP() shall return the process
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group ID of the session leader of the specified process.
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Otherwise, it shall return (\fBpid_t\fP)-1 and set \fIerrno\fP to
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indicate the error.
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.SH ERRORS
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.LP
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The \fIgetsid\fP() function shall fail if:
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.TP 7
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.B EPERM
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The process specified by \fIpid\fP is not in the same session as the
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calling process, and the implementation does not allow
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access to the process group ID of the session leader of that process
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from the calling process.
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.TP 7
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.B ESRCH
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There is no process with a process ID equal to \fIpid\fP.
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.sp
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.LP
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\fIThe following sections are informative.\fP
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.SH EXAMPLES
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.LP
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None.
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.SH APPLICATION USAGE
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.LP
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None.
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.SH RATIONALE
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.LP
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None.
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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2007-09-20 06:11:55 +00:00
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\fIexec\fP(), \fIfork\fP(), \fIgetpid\fP(), \fIgetpgid\fP(), \fIsetpgid\fP()
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, \fIsetsid\fP(), the Base Definitions volume of IEEE\ Std\ 1003.1-2001,
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2004-11-03 13:51:07 +00:00
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\fI<unistd.h>\fP
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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