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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <stdarg.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/vt.h>
#include "get-edid.h"
int verbose = 0;
static void timeout_handler(int signal)
{
fprintf(stderr, "ERROR: timeout during EDID probe\n");
exit(3);
}
int main(int argc, char **argv)
{
struct sigaction timeout_action;
char edid[(1 + MAX_EXTENSION_COUNT) * EDID_BLOCK_SIZE];
int try_in_console = 0;
int skip_vbe_check = 0;
int port = 0;
int no_timeout = 0;
int i;
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (strcmp(arg, "-v") == 0) verbose = 1;
else if (strcmp(arg, "--port") == 0 && i+1 < argc) port = atoi(argv[++i]);
else if (strcmp(arg, "--try-in-console") == 0) try_in_console = 1;
else if (strcmp(arg, "--skip-vbe-check") == 0) skip_vbe_check = 1;
else if (strcmp(arg, "--no-timeout") == 0) no_timeout = 1;
else if (strcmp(arg, "-h") == 0 ||
strcmp(arg, "--help") == 0) {
printf("usage: monitor-get-edid [-v] [--port <0-3>] [--try-in-console]\n"
" [--skip-vbe-check] [--no-timeout]\n");
exit(1);
}
}
if (!no_timeout) {
timeout_action.sa_handler = timeout_handler;
sigaction(SIGALRM, &timeout_action, NULL);
alarm(15);
}
int size = get_edid(edid, port, skip_vbe_check);
if (size < 0 && try_in_console) {
int non_X_console = 1;
struct vt_stat current;
int fd = open("/dev/console", O_RDWR);
if (getenv("DISPLAY") != NULL &&
ioctl(fd, VT_GETSTATE, ¤t) == 0 &&
current.v_active != non_X_console &&
ioctl(fd, VT_ACTIVATE, non_X_console) == 0 &&
ioctl(fd, VT_WAITACTIVE, non_X_console) == 0) {
/* retrying */
size = get_edid(edid, port, skip_vbe_check);
/* restore */
if (ioctl(fd, VT_ACTIVATE, current.v_active) == 0)
ioctl(fd, VT_WAITACTIVE, current.v_active);
}
close(fd);
}
if (size >= 0) {
if (write(STDOUT_FILENO, edid, size)) {
}
return 0;
}
/* returns 1 on error before any successful calls; no ports work;
* calling program may skip other ports
* returns 2 on other errors; a different port may still work (call to VBE was ok);
* calling program may speedup call on other ports with --skip-vbe-check
* returns 3 on timeout
*/
return -size;
}
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