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#include "config.h"
#include <libgnome/libgnome.h>
#include "gdm.h"
#include "misc.h"
#include "getvt.h"
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <dirent.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
extern int GdmFirstVT;
extern gboolean GdmVTAllocation;
#ifdef __linux__
#include <sys/vt.h>
static int
open_vt (int vtno)
{
char *vtname = g_strdup_printf ("/dev/tty%d", vtno);
int fd = open (vtname, O_RDWR);
g_free (vtname);
return fd;
}
static int
get_free_vt (int *vtfd)
{
int fd, fdv;
int vtno;
GList *to_close_vts = NULL, *li;
*vtfd = -1;
fd = open ("/dev/console", O_WRONLY, 0);
if (fd < 0)
return -1;
if ((ioctl(fd, VT_OPENQRY, &vtno) < 0) || (vtno == -1)) {
IGNORE_EINTR (close (fd));
return -1;
}
fdv = open_vt (vtno);
if (fdv < 0) {
IGNORE_EINTR (close (fd));
return -1;
}
while (vtno < GdmFirstVT) {
int oldvt = vtno;
to_close_vts = g_list_prepend (to_close_vts,
GINT_TO_POINTER (fdv));
if ((ioctl(fd, VT_OPENQRY, &vtno) < 0) || (vtno == -1)) {
vtno = -1;
goto cleanup;
}
if (oldvt == vtno) {
vtno = -1;
goto cleanup;
}
fdv = open_vt (vtno);
if (fdv < 0) {
vtno = -1;
goto cleanup;
}
}
*vtfd = fdv;
cleanup:
for (li = to_close_vts; li != NULL; li = li->next) {
IGNORE_EINTR (close (GPOINTER_TO_INT (li->data)));
}
return vtno;
}
char *
gdm_get_empty_vt_argument (int *fd, int *vt)
{
if ( ! GdmVTAllocation) {
*fd = -1;
return NULL;
}
*vt = get_free_vt (fd);
if (*vt < 0)
return NULL;
else
return g_strdup_printf ("vt%d", *vt);
}
void
gdm_change_vt (int vt)
{
char *cmd;
if (vt < 0)
return;
/* kind of hack, we could do it ourselves if we weren't lazy */
/* FIXME: we should really do the vt thing ourselves */
if (access ("/usr/bin/chvt", X_OK) == 0)
cmd = g_strdup_printf ("/usr/bin/chvt %d", vt);
else if (access ("/bin/chvt", X_OK) == 0)
cmd = g_strdup_printf ("/bin/chvt %d", vt);
else
cmd = NULL;
if (cmd != NULL)
system (cmd);
g_free (cmd);
}
#else /* here this is just a stub, we don't know how to do this outside
of linux really */
char *
gdm_get_empty_vt_argument (int *fd, int *vt)
{
*fd = -1;
*vt = -1;
return NULL;
}
void
gdm_change_vt (int vt)
{
return;
}
#endif
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