--- /dev/null
+/*
+ * consoles.c Routines to detect the system consoles
+ *
+ * Copyright (c) 2011 SuSE LINUX Products GmbH, All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program (see the file COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ *
+ * Author: Werner Fink <werner@suse.de>
+ */
+
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include "consoles.h"
+
+#if !defined(__STDC_VERSION__) || (__STDC_VERSION__ < 199901L)
+# ifndef typeof
+# define typeof __typeof__
+# endif
+# ifndef restrict
+# define restrict __restrict__
+# endif
+#endif
+
+#define alignof(type) ((sizeof(type)+(sizeof(void*)-1)) & ~(sizeof(void*)-1))
+
+struct console *consoles;
+
+static dev_t comparedev;
+static char* scandev(DIR *dir)
+{
+ char *name = (char*)0;
+ struct dirent *dent;
+ int fd;
+
+ fd = dirfd(dir);
+ rewinddir(dir);
+ while ((dent = readdir(dir))) {
+ char path[PATH_MAX];
+ struct stat st;
+ if (fstatat(fd, dent->d_name, &st, 0) < 0)
+ continue;
+ if (!S_ISCHR(st.st_mode))
+ continue;
+ if (comparedev != st.st_rdev)
+ continue;
+ if ((size_t)snprintf(path, sizeof(path), "/dev/%s", dent->d_name) >= sizeof(path))
+ continue;
+ name = realpath(path, NULL);
+ break;
+ }
+ return name;
+}
+
+void detect_consoles(void)
+{
+ FILE *fc;
+ if ((fc = fopen("/proc/consoles", "r"))) {
+ char fbuf[16];
+ int maj, min;
+ DIR *dir;
+ dir = opendir("/dev");
+ if (!dir)
+ goto out;
+ while ((fscanf(fc, "%*s %*s (%[^)]) %d:%d", &fbuf[0], &maj, &min) == 3)) {
+ struct console *restrict tail;
+ char * name;
+
+ if (!strchr(fbuf, 'E'))
+ continue;
+ comparedev = makedev(maj, min);
+ name = scandev(dir);
+
+ if (!name)
+ continue;
+
+ if (posix_memalign((void*)&tail, sizeof(void*), alignof(typeof(struct console))) != 0)
+ perror("memory allocation");
+
+ tail->next = (struct console*)0;
+ tail->tty = name;
+
+ if (!consoles)
+ consoles = tail;
+ else
+ consoles->next = tail;
+ }
+ closedir(dir);
+out:
+ fclose(fc);
+ }
+}