Allow active VT to be queried from tdm Only display media notification messages on active VT Hide logout action buttons if logout process unstallspull/2/head
Timothy Pearson
11 years ago
parent
3a84ecae5d
commit
960cc8392d
@ -0,0 +1,75 @@
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <unistd.h>
|
||||
#include <fcntl.h>
|
||||
#include <errno.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <linux/kd.h>
|
||||
#include "getfd.h"
|
||||
|
||||
/*
|
||||
* getfd.c
|
||||
*
|
||||
* Get an fd for use with kbd/console ioctls.
|
||||
* We try several things because opening /dev/console will fail
|
||||
* if someone else used X (which does a chown on /dev/console).
|
||||
*/
|
||||
|
||||
static int
|
||||
is_a_console(int fd) {
|
||||
char arg;
|
||||
|
||||
arg = 0;
|
||||
return (ioctl(fd, KDGKBTYPE, &arg) == 0
|
||||
&& ((arg == KB_101) || (arg == KB_84)));
|
||||
}
|
||||
|
||||
static int
|
||||
open_a_console(const char *fnam) {
|
||||
int fd;
|
||||
|
||||
/*
|
||||
* For ioctl purposes we only need some fd and permissions
|
||||
* do not matter. But setfont:activatemap() does a write.
|
||||
*/
|
||||
fd = open(fnam, O_RDWR);
|
||||
if (fd < 0 && errno == EACCES)
|
||||
fd = open(fnam, O_WRONLY);
|
||||
if (fd < 0 && errno == EACCES)
|
||||
fd = open(fnam, O_RDONLY);
|
||||
if (fd < 0)
|
||||
return -1;
|
||||
if (!is_a_console(fd)) {
|
||||
close(fd);
|
||||
return -1;
|
||||
}
|
||||
return fd;
|
||||
}
|
||||
|
||||
int getfd() {
|
||||
int fd;
|
||||
|
||||
fd = open_a_console("/dev/tty");
|
||||
if (fd >= 0)
|
||||
return fd;
|
||||
|
||||
fd = open_a_console("/dev/tty0");
|
||||
if (fd >= 0)
|
||||
return fd;
|
||||
|
||||
fd = open_a_console("/dev/vc/0");
|
||||
if (fd >= 0)
|
||||
return fd;
|
||||
|
||||
fd = open_a_console("/dev/console");
|
||||
if (fd >= 0)
|
||||
return fd;
|
||||
|
||||
for (fd = 0; fd < 3; fd++)
|
||||
if (is_a_console(fd))
|
||||
return fd;
|
||||
|
||||
// "Couldnt get a file descriptor referring to the console
|
||||
return -1;
|
||||
}
|
||||
|
||||
@ -0,0 +1 @@
|
||||
extern int getfd();
|
||||
Loading…
Reference in new issue