mirror of
https://gitlab.freedesktop.org/xorg/xserver.git
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389b528203
These functions shouldn't be called by drivers or extensions, thus shouldn't be exported. Also moving it to separate header, so the already huge ones aren't cluttered with even more things. Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net> Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1334>
417 lines
12 KiB
C
417 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 "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_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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