178 lines
4.0 KiB
C
178 lines
4.0 KiB
C
/* $XConsortium: SmHftRing.c /main/5 1996/11/01 10:17:15 drk $ */
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/* *
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* (c) Copyright 1993, 1994 Hewlett-Packard Company *
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* (c) Copyright 1993, 1994 International Business Machines Corp. *
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* (c) Copyright 1993, 1994 Sun Microsystems, Inc. *
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* (c) Copyright 1993, 1994 Novell, Inc. *
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*/
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/*************************************<+>*************************************
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*****************************************************************************
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**
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** File: SmHftRing.c
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**
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** Project: DT Session Manager (dtsession)
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**
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** Description:
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** -----------
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** This file contains the AIX 3.2.x specific code required to enable and
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** disable the HFT ring. This is used for session locking.
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**
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*****************************************************************************
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*************************************<+>*************************************/
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#include <stdio.h>
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#include <sys/hft.h>
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#include <fcntl.h>
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#include "Sm.h"
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#include <X11/Xosdefs.h>
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#include <errno.h>
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#ifdef X_NOT_STDC_ENV
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extern int errno;
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#endif
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/*
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* Local functions.
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*/
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static int open_hft_file(char *);
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static void close_hft_file(int);
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static int get_hft_ring(void);
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static int process_hft(int, unsigned int);
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static int scan_hft_ring(int);
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static int my_strpos(char *, char);
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static int is_local_display(void);
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#define HFTRFILE "/dev/hft/0"
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#define HFQSTAT hftqstat
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#define HFSMGRCMD hftsmgrcmd
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#define HFQEIO HFQERROR
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#define HFCSMGR HFTCSMGR
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#define HFQSMGR HFTQSMGR
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#define HFVTSTATUS (HFVTACTIVE | HFVTNOHOTKEY)
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#define HF_VTIODN hf_vtid
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/*
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* Global variables.
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*/
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int hft_file;
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struct HFQSTAT hft_ring;
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static int
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open_hft_file(char *hft_file_name)
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{
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return(open(hft_file_name, O_RDONLY));
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}
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static void
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close_hft_file(int hft_file)
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{
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close(hft_file);
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}
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static int
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get_hft_ring(void)
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{
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int rc = -1;
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struct hfbuf hft_buffer;
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hft_buffer.hf_bufp = (char *)&hft_ring;
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hft_buffer.hf_buflen = sizeof(hft_ring);
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/*
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* Open the hft queue manager.
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*/
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if ((hft_file = open_hft_file(HFTRFILE)) >= 0)
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{
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rc = ioctl(hft_file, HFQSMGR, &hft_buffer);
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close_hft_file(hft_file);
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}
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return(rc);
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}
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static int
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process_hft(int hft_action, unsigned int hft_vtid)
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{
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struct HFSMGRCMD hft_manager;
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char hft_file_name[20];
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int rc = -1;
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hft_manager.hf_cmd = hft_action;
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hft_manager.hf_vtid = hft_vtid;
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sprintf(hft_file_name, "/dev/hft/%u", hft_vtid);
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if ((hft_file = open_hft_file(hft_file_name)) >= 0)
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{
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rc = ioctl(hft_file, HFCSMGR, &hft_manager);
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close_hft_file(hft_file);
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}
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return(rc);
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}
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static int
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scan_hft_ring(int hft_action)
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{
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int hft;
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int rc = 0;
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if (get_hft_ring() != 0)
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{
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return(-1);
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}
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for (hft = 0; hft < hft_ring.hf_numvts; hft++)
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{
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if (!(hft_ring.hf_vtinfo[hft].hf_vtstate & HFVTSTATUS))
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{
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if (process_hft(hft_action, hft_ring.hf_vtinfo[hft].HF_VTIODN) != 0)
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{
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return(-1);
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}
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}
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}
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return(0);
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}
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static int
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my_strpos(char *s, char c)
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{
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char *t;
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return((t=strchr(s,c)) == NULL ? -1 : t - s);
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}
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static int
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is_local_display(void)
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{
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static int is_local = -1; /* display status */
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char *dpyname; /* display name */
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int n; /* position of colon char */
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char hostname[MAXHOSTNAMELEN]; /* host name */
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if (is_local == -1)
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{
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is_local =
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(((dpyname = getenv("DISPLAY")) != NULL) && /* name not null */
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((n = my_strpos(dpyname, ':')) != -1) && /* name has a colon */
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((n == 0) || /* name is :n */
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(strncmp(dpyname, "unix", n) == 0) || /* name is unix:n */
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(strncmp(dpyname, "localhost", n) == 0) || /* name is localhost:n */
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((gethostname(hostname, MAXHOSTNAMELEN) == 0) && /* hostname ok */
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(strncmp(dpyname, hostname, n) == 0)))); /* name == hostname */
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}
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return(is_local);
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}
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void
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AixEnableHftRing(int enable)
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{
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if (is_local_display())
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{
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scan_hft_ring(enable ? SMUNHIDE : SMHIDE);
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}
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}
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