NAME
setsid —
create session and set process group
ID
LIBRARY
library “libc”
SYNOPSIS
#include
<unistd.h>
pid_t
setsid(void);
DESCRIPTION
Thesetsid()
system call 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.
RETURN VALUES
Upon successful completion, the setsid()
system call returns the value of the process group ID of the new process
group, which is the same as the process ID of the calling process. If an
error occurs, setsid() returns -1 and the global
variable errno is set to indicate the error.
ERRORS
The setsid() system call will fail if:
- [
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
STANDARDS
The setsid() system call is expected to be
compliant with the IEEE Std 1003.1-1990
(“POSIX.1”) specification.