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SETSID(2) Linux Programmer's Manual SETSID(2) NAME setsid - creates a session and sets the process group ID SYNOPSIS #include <unistd.h> pid_t setsid(void); DESCRIPTION setsid() creates a new session if the calling process is not a process group leader. The calling process is the leader of the new session, the process group leader of the new process group, and has no control- ling tty. The process group ID and session ID of the calling process are set to the PID of the calling process. The calling process will be the only process in this new process group and in this new session. RETURN VALUE The session ID of the calling process. ERRORS On error, -1 will be returned. The only error which can happen is EPERM. It is returned when the process group ID of any process equals the PID of the calling process. Thus, in particular, setsid fails if the calling process is already a process group leader. NOTES A process group leader is a process with process group ID equal to its PID. In order to be sure that setsid will succeed, fork and exit, and have the child do setsid(). CONFORMING TO POSIX, SVr4. SEE ALSO setpgid(2), setpgrp(2) Linux 1.0.0 1994-08-27 SETSID(2)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | NOTES | CONFORMING TO | SEE ALSO
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