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Length: 1091 (0x443)
Types: TextFile
Notes: UNIX file
Names: »vhangup.2v«
└─⟦26887b7e0⟧ Bits:30009717 Comet 32 harddisk image
└─⟦28c352965⟧ »/a« UNIX Filesystem
└─⟦this⟧ »usr/man/man2/vhangup.2v«
.ig @(#)vhangup.2v 2.1 7/1/84 @(#)Copyright (C) 1983 by National Semiconductor Corp. .. .TH VHANGUP 2V .SH NAME vhangup \- virtually ``hangup'' the current control terminal .SH SYNOPSIS .B vhangup() .SH DESCRIPTION .I Vhangup is used by the initialization process .IR init (8) to arrange that users are given \*(lqclean\*(rq' terminals at login, by revoking access of the previous users' processes to the terminal. To effect this, .I vhangup searches the system tables for references to the control terminal of the invoking process, revoking access permissions on each instance of the terminal which it finds. Further attempts to access the terminal by the affected processes will yield i/o errors (EBADF). Finally, a hangup signal (SIGHUP) is sent to the process group of the control terminal. .PP This call is restricted to the super-user. .SH SEE ALSO init (8) .SH BUGS Access to the control terminal via .I /dev/tty is still possible. .PP This call is peculiar to this version of UNIX. The options and specifications of this system call and even the call itself are subject to change.