SETSID(2)                 NetBSD System Calls Manual                 SETSID(2)


NAME
setsid -- create session and set process group ID
LIBRARY
Standard C Library (libc, -lc)
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 process 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 conforms to ISO/IEC 9945-1:1990 (``POSIX.1''). NetBSD 8.1 April 4, 2011 NetBSD 8.1

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