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call GAL_SuspendVideo and GAL_ResumeVideo for VT switch

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This commit is contained in:
Vincent Wei
2019-06-14 15:49:53 +08:00
parent e45b4ccad8
commit 3f0ada1ee2
1 changed files with 92 additions and 88 deletions
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src/ial/linux-tty.c
+92 -88
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@@ -60,8 +60,6 @@
#include "cliprect.h"
#include "gal.h"
#include "internals.h"
#include "ctrlclass.h"
#include "dc.h"
#include "ial.h"
#include "linux-tty.h"
@@ -100,49 +98,31 @@ static void vt_switch_requested(int signo)
if (console_should_be_active) {
/* Performs a switch back. */
int new_fd;
IAL_ResumeMouse();
if ((new_fd = IAL_ResumeKeyboard()) >= 0)
ttyfd = new_fd;
ioctl (ttyfd, VT_RELDISP, VT_ACKACQ);
IAL_ResumeKeyboard();
GAL_ResumeVideo();
console_active = 1;
#ifndef _MGRM_THREADS
__mg_switch_away = FALSE;
#endif
if (ioctl (ttyfd, VT_RELDISP, VT_ACKACQ) == -1) {
_ERR_PRINTF("Linux>TTY: failed to switch VT back: %m\n");
}
#ifdef _MGRM_PROCESSES
UpdateTopmostLayer (NULL);
#else
SendNotifyMessage (HWND_DESKTOP, MSG_PAINT, 0, 0);
#endif
}
else {
/* Performs a switch away. */
#ifdef _MGRM_PROCESSES
DisableClientsOutput ();
#endif
if (ioctl (ttyfd, VT_RELDISP, 1) == -1) {
fprintf (stderr, "Error can't switch away from VT: %m\n");
return;
}
console_active = 0;
#ifndef _MGRM_THREADS
__mg_switch_away = TRUE;
#endif
GAL_SuspendVideo();
IAL_SuspendKeyboard();
IAL_SuspendMouse();
if (ioctl (ttyfd, VT_RELDISP, 1) == -1) {
_ERR_PRINTF("Linux>TTY: failed to switch away from VT: %m\n");
}
}
}
/* Init linux tty module, and returns the tty fd */
int mg_linux_tty_init(BOOL graf_mode, BOOL vt_switch)
int mg_linux_tty_init(BOOL graf_mode)
{
const char* tty_dev;
if (geteuid() == 0)
@@ -170,49 +150,6 @@ int mg_linux_tty_init(BOOL graf_mode, BOOL vt_switch)
}
}
if (vt_switch) {
struct sigaction sa;
struct vt_mode vtm;
struct vt_stat stat;
if (ioctl (ttyfd, VT_GETSTATE, &stat) == -1) {
_ERR_PRINTF("Linux>TTY: failed to get vt state: %m.\n");
goto fail;
}
current_vt = stat.v_active;
console_active = console_should_be_active = 1;
/* Hook the signals */
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGIO); /* block async IO during the VT switch */
sa.sa_flags = 0;
sa.sa_handler = vt_switch_requested;
if ((sigaction(SIGRELVT, &sa, NULL) < 0) || (sigaction(SIGACQVT, &sa, NULL) < 0)) {
_ERR_PRINTF("Linux>TTY: Unable to control VT switch.\n");
goto fail;
}
/* Save old mode, take control, and arrange for the signals
* to be raised. */
if (ioctl(ttyfd, VT_GETMODE, &saved_vtmode) == -1) {
_ERR_PRINTF("Linux>TTY: failed to get vt mode: %m.\n");
goto fail;
}
vtm = saved_vtmode;
vtm.mode = VT_PROCESS;
vtm.relsig = SIGRELVT;
vtm.acqsig = SIGACQVT;
if (ioctl(ttyfd, VT_SETMODE, &vtm) == -1) {
_ERR_PRINTF("Linux>TTY: failed to set vt mode: %m.\n");
goto fail;
}
vtswitch_initialized = 1;
}
return ttyfd;
fail:
@@ -224,24 +161,87 @@ fail:
return -1;
}
int mg_linux_tty_enable_vt_switch(void)
{
struct sigaction sa;
struct vt_mode vtm;
struct vt_stat stat;
if (ttyfd < 0) {
if (mg_linux_tty_init(FALSE) < 0)
goto fail;
}
if (ioctl (ttyfd, VT_GETSTATE, &stat) == -1) {
_ERR_PRINTF("Linux>TTY: failed to get vt state: %m.\n");
goto fail;
}
current_vt = stat.v_active;
console_active = console_should_be_active = 1;
/* Hook the signals */
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGIO); /* block async IO during the VT switch */
sa.sa_flags = 0;
sa.sa_handler = vt_switch_requested;
if ((sigaction(SIGRELVT, &sa, NULL) < 0) ||
(sigaction(SIGACQVT, &sa, NULL) < 0)) {
_ERR_PRINTF("Linux>TTY: Unable to control VT switch.\n");
goto fail;
}
/* Save old mode, take control, and arrange for the signals
* to be raised. */
if (ioctl(ttyfd, VT_GETMODE, &saved_vtmode) == -1) {
_ERR_PRINTF("Linux>TTY: failed to get vt mode: %m.\n");
goto fail;
}
vtm = saved_vtmode;
vtm.mode = VT_PROCESS;
vtm.relsig = SIGRELVT;
vtm.acqsig = SIGACQVT;
if (ioctl(ttyfd, VT_SETMODE, &vtm) == -1) {
_ERR_PRINTF("Linux>TTY: failed to set vt mode: %m.\n");
goto fail;
}
vtswitch_initialized = 1;
return 0;
fail:
return -1;
}
int mg_linux_tty_disable_vt_switch(void)
{
struct sigaction sa;
if (ttyfd < 0)
return -1;
/* Must turn off the signals before unhooking them... */
ioctl (ttyfd, VT_SETMODE, &saved_vtmode);
sigemptyset (&sa.sa_mask);
sa.sa_handler = SIG_DFL;
sa.sa_flags = SA_RESTART;
sigaction (SIGRELVT, &sa, NULL);
sigaction (SIGACQVT, &sa, NULL);
vtswitch_initialized = 0;
return 0;
}
int mg_linux_tty_fini(void)
{
if (ttyfd < 0)
return -1;
if (vtswitch_initialized) {
struct sigaction sa;
/* Must turn off the signals before unhooking them... */
ioctl (ttyfd, VT_SETMODE, &saved_vtmode);
sigemptyset (&sa.sa_mask);
sa.sa_handler = SIG_DFL;
sa.sa_flags = SA_RESTART;
sigaction (SIGRELVT, &sa, NULL);
sigaction (SIGACQVT, &sa, NULL);
vtswitch_initialized = 0;
mg_linux_tty_disable_vt_switch();
}
if (old_kd_mode >= 0) {
@@ -256,9 +256,13 @@ int mg_linux_tty_fini(void)
int mg_linux_tty_switch_vt(int vt)
{
if (ttyfd < 0 || !vtswitch_initialized || vt == current_vt)
return 1;
return -1;
if (ioctl (ttyfd, VT_ACTIVATE, vt) == -1) {
_ERR_PRINTF("Linux>TTY: failed to activiate VT (%d): %m\n", vt);
return -1;
}
ioctl (ttyfd, VT_ACTIVATE, vt);
return 0;
}