SETSID(2) BSD Programmer's Manual SETSID(2) NNAAMMEE sseettssiidd - create session and set process group ID SSYYNNOOPPSSIISS ##iinncclluuddee <<ssyyss//ttyyppeess..hh>> _p_i_d___t sseettssiidd(_v_o_i_d); DDEESSCCRRIIPPTTIIOONN The sseettssiidd 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 sseettssiidd 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. EERRRROORRSS If an error occurs, sseettssiidd returns -1 and the global variable _e_r_r_n_o 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. SSEEEE AALLSSOO setpgid(3), tcgetpgrp(3), tcsetpgrp(3) SSTTAANNDDAARRDDSS The sseettssiidd function is expected to be compliant with the IEEE Std1003.1-1988 (``POSIX'') specification. 4.4BSD June 4, 1993 1