Originální popis anglicky:
getsid - get the process group ID of a session leader
Návod, kniha: POSIX Programmer's Manual
#include <unistd.h>
pid_t getsid(pid_t
pid);
The
getsid() function shall obtain the process group ID of the process
that is the session leader of the process specified by
pid. If
pid is (
pid_t)0, it specifies the calling process.
Upon successful completion,
getsid() shall return the process group ID of
the session leader of the specified process. Otherwise, it shall return (
pid_t)-1 and set
errno to indicate the error.
The
getsid() function shall fail if:
- EPERM
- The process specified by pid is not in the same
session as the calling process, and the implementation does not allow
access to the process group ID of the session leader of that process from
the calling process.
- ESRCH
- There is no process with a process ID equal to pid.
The following sections are informative.
None.
None.
None.
None.
exec() ,
fork() ,
getpid() ,
getpgid() ,
setpgid() ,
setsid() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<unistd.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
