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setsid(2)

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RocketLink!--> Man page versions: OpenBSD FreeBSD NetBSD RedHat Solaris Others



SETSID(2)                 OpenBSD Programmer's Manual                SETSID(2)

NAME
     setsid - create session and set process group ID



SYNOPSIS
     #include <unistd.h>

     pid_t
     setsid(void);

DESCRIPTION
     The setsid function creates a new session.  The calling process is the
     session leader of the new session, is the process group leader of a new
     process group and has no controlling terminal.  The calling process is
     the only process in either the session or the process group.

     Upon successful completion, the setsid function returns the value of the
     process group ID of the new process group, which is the same as the pro-
     cess ID of the calling process.

ERRORS
     If an error occurs, setsid returns -1 and the global variable errno is
     set to indicate the error, as follows:

     [EPERM]       The calling process is already a process group leader, or
                   the process group ID of a process other than the calling
                   process matches the process ID of the calling process.

SEE ALSO
     getsid(2),  setpgid(2),  tcgetpgrp(3),  tcsetpgrp(3)

STANDARDS
     The setsid function is expected to be compliant with the IEEE
     Std1003.1-1988 (``POSIX'') specification.

OpenBSD 2.6                      June 4, 1993                                1

Source: OpenBSD 2.6 man pages. Copyright: Portions are copyrighted by BERKELEY
SOFTWARE DESIGN, INC., The Regents of the University of California, Massachusetts
Institute of Technology, Free Software Foundation, FreeBSD Inc., and others.



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