420 lines
12 KiB
C
420 lines
12 KiB
C
/*
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* Copyright 1992 by Orest Zborowski <obz@Kodak.com>
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* Copyright 1993 by David Wexelblat <dwex@goblin.org>
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the names of Orest Zborowski and David Wexelblat
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* not be used in advertising or publicity pertaining to distribution of
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* the software without specific, written prior permission. Orest Zborowski
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* and David Wexelblat make no representations about the suitability of this
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* software for any purpose. It is provided "as is" without express or
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* implied warranty.
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*
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* OREST ZBOROWSKI AND DAVID WEXELBLAT DISCLAIMS ALL WARRANTIES WITH REGARD
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* TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL OREST ZBOROWSKI OR DAVID WEXELBLAT BE LIABLE
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* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include <errno.h>
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#include <X11/X.h>
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#include <X11/Xmd.h>
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#include "os/cmdline.h"
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#include "os/osdep.h"
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#include "compiler.h"
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#include "linux.h"
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#include "xf86.h"
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#include "xf86Priv.h"
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#include "xf86_os_support.h"
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#include "xf86_OSlib.h"
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#include <sys/stat.h>
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#ifdef HAVE_SYS_SYSMACROS_H
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#include <sys/sysmacros.h>
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#endif
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#ifndef K_OFF
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#define K_OFF 0x4
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#endif
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static Bool KeepTty = FALSE;
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static int activeVT = -1;
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static char vtname[11];
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static struct termios tty_attr; /* tty state to restore */
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static int tty_mode; /* kbd mode to restore */
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static void
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drain_console(int fd, void *closure)
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{
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errno = 0;
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if (tcflush(fd, TCIOFLUSH) == -1 && errno == EIO) {
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xf86SetConsoleHandler(NULL, NULL);
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}
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}
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static int
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switch_to(int vt, const char *from)
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{
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int ret;
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SYSCALL(ret = ioctl(xf86Info.consoleFd, VT_ACTIVATE, vt));
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if (ret < 0) {
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xf86Msg(X_WARNING, "%s: VT_ACTIVATE failed: %s\n", from, strerror(errno));
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return 0;
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}
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SYSCALL(ret = ioctl(xf86Info.consoleFd, VT_WAITACTIVE, vt));
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if (ret < 0) {
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xf86Msg(X_WARNING, "%s: VT_WAITACTIVE failed: %s\n", from, strerror(errno));
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return 0;
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}
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return 1;
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}
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wformat-nonliteral"
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int
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linux_parse_vt_settings(int may_fail)
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{
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int i, fd = -1, ret, current_vt = -1;
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struct vt_stat vts;
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struct stat st;
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MessageType from = X_PROBED;
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/* Only do this once */
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static int vt_settings_parsed = 0;
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if (vt_settings_parsed)
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return 1;
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/*
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* setup the virtual terminal manager
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*/
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if (xf86Info.vtno != -1) {
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from = X_CMDLINE;
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}
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else {
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fd = open("/dev/tty0", O_WRONLY, 0);
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if (fd < 0) {
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if (may_fail)
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return 0;
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FatalError("parse_vt_settings: Cannot open /dev/tty0 (%s)\n",
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strerror(errno));
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}
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if (xf86Info.ShareVTs) {
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SYSCALL(ret = ioctl(fd, VT_GETSTATE, &vts));
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if (ret < 0) {
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if (may_fail)
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return 0;
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FatalError("parse_vt_settings: Cannot find the current"
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" VT (%s)\n", strerror(errno));
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}
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xf86Info.vtno = vts.v_active;
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}
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else {
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SYSCALL(ret = ioctl(fd, VT_OPENQRY, &xf86Info.vtno));
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if (ret < 0) {
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if (may_fail)
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return 0;
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FatalError("parse_vt_settings: Cannot find a free VT: "
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"%s\n", strerror(errno));
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}
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if (xf86Info.vtno == -1) {
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if (may_fail)
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return 0;
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FatalError("parse_vt_settings: Cannot find a free VT\n");
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}
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}
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close(fd);
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}
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xf86Msg(from, "using VT number %d\n\n", xf86Info.vtno);
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/* Some of stdin / stdout / stderr maybe redirected to a file */
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for (i = STDIN_FILENO; i <= STDERR_FILENO; i++) {
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ret = fstat(i, &st);
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if (ret == 0 && S_ISCHR(st.st_mode) && major(st.st_rdev) == 4) {
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current_vt = minor(st.st_rdev);
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break;
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}
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}
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if (!KeepTty && current_vt == xf86Info.vtno) {
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xf86Msg(X_PROBED,
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"controlling tty is VT number %d, auto-enabling KeepTty\n",
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current_vt);
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KeepTty = TRUE;
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}
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vt_settings_parsed = 1;
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return 1;
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}
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int
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linux_get_keeptty(void)
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{
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return KeepTty;
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}
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void
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xf86OpenConsole(void)
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{
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int i, ret;
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struct vt_stat vts;
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struct vt_mode VT;
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const char *vcs[] = { "/dev/vc/%d", "/dev/tty%d", NULL };
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if (serverGeneration == 1) {
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linux_parse_vt_settings(FALSE);
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if (!KeepTty) {
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pid_t ppid = getppid();
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pid_t ppgid;
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ppgid = getpgid(ppid);
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/*
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* change to parent process group that pgid != pid so
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* that setsid() doesn't fail and we become process
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* group leader
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*/
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if (setpgid(0, ppgid) < 0)
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xf86Msg(X_WARNING, "xf86OpenConsole: setpgid failed: %s\n",
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strerror(errno));
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/* become process group leader */
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if ((setsid() < 0))
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xf86Msg(X_WARNING, "xf86OpenConsole: setsid failed: %s\n",
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strerror(errno));
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}
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i = 0;
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while (vcs[i] != NULL) {
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snprintf(vtname, sizeof(vtname), vcs[i], xf86Info.vtno); /* /dev/tty1-64 */
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if ((xf86Info.consoleFd = open(vtname, O_RDWR | O_NDELAY, 0)) >= 0)
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break;
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i++;
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}
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if (xf86Info.consoleFd < 0)
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FatalError("xf86OpenConsole: Cannot open virtual console"
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" %d (%s)\n", xf86Info.vtno, strerror(errno));
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/*
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* Linux doesn't switch to an active vt after the last close of a vt,
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* so we do this ourselves by remembering which is active now.
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*/
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SYSCALL(ret = ioctl(xf86Info.consoleFd, VT_GETSTATE, &vts));
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if (ret < 0)
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xf86Msg(X_WARNING, "xf86OpenConsole: VT_GETSTATE failed: %s\n",
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strerror(errno));
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else
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activeVT = vts.v_active;
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if (!xf86Info.ShareVTs) {
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struct termios nTty;
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/*
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* now get the VT. This _must_ succeed, or else fail completely.
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*/
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if (!switch_to(xf86Info.vtno, "xf86OpenConsole"))
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FatalError("xf86OpenConsole: Switching VT failed\n");
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SYSCALL(ret = ioctl(xf86Info.consoleFd, VT_GETMODE, &VT));
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if (ret < 0)
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FatalError("xf86OpenConsole: VT_GETMODE failed %s\n",
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strerror(errno));
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OsSignal(SIGUSR1, xf86VTRequest);
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VT.mode = VT_PROCESS;
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VT.relsig = SIGUSR1;
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VT.acqsig = SIGUSR1;
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SYSCALL(ret = ioctl(xf86Info.consoleFd, VT_SETMODE, &VT));
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if (ret < 0)
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FatalError
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("xf86OpenConsole: VT_SETMODE VT_PROCESS failed: %s\n",
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strerror(errno));
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SYSCALL(ret = ioctl(xf86Info.consoleFd, KDSETMODE, KD_GRAPHICS));
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if (ret < 0)
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FatalError("xf86OpenConsole: KDSETMODE KD_GRAPHICS failed %s\n",
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strerror(errno));
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tcgetattr(xf86Info.consoleFd, &tty_attr);
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SYSCALL(ioctl(xf86Info.consoleFd, KDGKBMODE, &tty_mode));
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/* disable kernel special keys and buffering */
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SYSCALL(ret = ioctl(xf86Info.consoleFd, KDSKBMODE, K_OFF));
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if (ret < 0)
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{
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/* fine, just disable special keys */
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SYSCALL(ret = ioctl(xf86Info.consoleFd, KDSKBMODE, K_RAW));
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if (ret < 0)
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FatalError("xf86OpenConsole: KDSKBMODE K_RAW failed %s\n",
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strerror(errno));
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/* ... and drain events, else the kernel gets angry */
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xf86SetConsoleHandler(drain_console, NULL);
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}
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nTty = tty_attr;
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nTty.c_iflag = (IGNPAR | IGNBRK) & (~PARMRK) & (~ISTRIP);
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nTty.c_oflag = 0;
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nTty.c_cflag = CREAD | CS8;
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nTty.c_lflag = 0;
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nTty.c_cc[VTIME] = 0;
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nTty.c_cc[VMIN] = 1;
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cfsetispeed(&nTty, 9600);
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cfsetospeed(&nTty, 9600);
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tcsetattr(xf86Info.consoleFd, TCSANOW, &nTty);
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}
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}
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else { /* serverGeneration != 1 */
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if (!xf86Info.ShareVTs && xf86Info.autoVTSwitch) {
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/* now get the VT */
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if (!switch_to(xf86Info.vtno, "xf86OpenConsole"))
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FatalError("xf86OpenConsole: Switching VT failed\n");
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}
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}
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}
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#pragma GCC diagnostic pop
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void
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xf86CloseConsole(void)
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{
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struct vt_mode VT;
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struct vt_stat vts;
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int ret;
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if (xf86Info.ShareVTs) {
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close(xf86Info.consoleFd);
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return;
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}
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/*
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* unregister the drain_console handler
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* - what to do if someone else changed it in the meantime?
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*/
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xf86SetConsoleHandler(NULL, NULL);
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/* Back to text mode ... */
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SYSCALL(ret = ioctl(xf86Info.consoleFd, KDSETMODE, KD_TEXT));
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if (ret < 0)
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xf86Msg(X_WARNING, "xf86CloseConsole: KDSETMODE failed: %s\n",
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strerror(errno));
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SYSCALL(ioctl(xf86Info.consoleFd, KDSKBMODE, tty_mode));
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tcsetattr(xf86Info.consoleFd, TCSANOW, &tty_attr);
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SYSCALL(ret = ioctl(xf86Info.consoleFd, VT_GETMODE, &VT));
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if (ret < 0)
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xf86Msg(X_WARNING, "xf86CloseConsole: VT_GETMODE failed: %s\n",
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strerror(errno));
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else {
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/* set dflt vt handling */
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VT.mode = VT_AUTO;
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SYSCALL(ret = ioctl(xf86Info.consoleFd, VT_SETMODE, &VT));
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if (ret < 0)
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xf86Msg(X_WARNING, "xf86CloseConsole: VT_SETMODE failed: %s\n",
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strerror(errno));
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}
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if (xf86Info.autoVTSwitch) {
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/*
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* Perform a switch back to the active VT when we were started if our
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* vt is active now.
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*/
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if (activeVT >= 0) {
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SYSCALL(ret = ioctl(xf86Info.consoleFd, VT_GETSTATE, &vts));
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if (ret < 0) {
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xf86Msg(X_WARNING, "xf86OpenConsole: VT_GETSTATE failed: %s\n",
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strerror(errno));
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} else {
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if (vts.v_active == xf86Info.vtno) {
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switch_to(activeVT, "xf86CloseConsole");
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}
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}
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activeVT = -1;
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}
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}
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close(xf86Info.consoleFd); /* make the vt-manager happy */
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}
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#define CHECK_FOR_REQUIRED_ARGUMENT() \
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if (((i + 1) >= argc) || (!argv[i + 1])) { \
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ErrorF("Required argument to %s not specified\n", argv[i]); \
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UseMsg(); \
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FatalError("Required argument to %s not specified\n", argv[i]); \
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}
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int
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xf86ProcessArgument(int argc, char *argv[], int i)
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{
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/*
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* Keep server from detaching from controlling tty. This is useful
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* when debugging (so the server can receive keyboard signals.
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*/
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if (!strcmp(argv[i], "-keeptty")) {
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KeepTty = TRUE;
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return 1;
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}
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if ((argv[i][0] == 'v') && (argv[i][1] == 't')) {
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if (sscanf(argv[i], "vt%2d", &xf86Info.vtno) == 0) {
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UseMsg();
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xf86Info.vtno = -1;
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return 0;
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}
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return 1;
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}
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if (!strcmp(argv[i], "-masterfd")) {
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CHECK_FOR_REQUIRED_ARGUMENT();
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if (PrivsElevated())
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FatalError("\nCannot specify -masterfd when server is setuid/setgid\n");
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if (sscanf(argv[++i], "%d", &xf86DRMMasterFd) != 1) {
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UseMsg();
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xf86DRMMasterFd = -1;
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return 0;
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}
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return 2;
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}
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return 0;
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}
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void
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xf86UseMsg(void)
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{
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ErrorF("vtXX use the specified VT number\n");
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ErrorF("-keeptty ");
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ErrorF("don't detach controlling tty (for debugging only)\n");
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ErrorF("-masterfd <fd> use the specified fd as the DRM master fd (not if setuid/gid)\n");
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}
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void
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xf86OSInputThreadInit(void)
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{
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return;
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}
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