1 files changed, 45 insertions, 0 deletions
diff --git a/riemann.fmi.uni-sofia.bg/ngetty/ngetty-1.1/check_first.c b/riemann.fmi.uni-sofia.bg/ngetty/ngetty-1.1/check_first.c
new file mode 100644
index 0000000..129a84a
--- /dev/null
+++ b/riemann.fmi.uni-sofia.bg/ngetty/ngetty-1.1/check_first.c
@@ -0,0 +1,45 @@
+#include <sys/stat.h>
+#include "sysinfo_defs.h"
+#include "boottime_defs.h"
+
+#if !defined(HAVE_SYSTEM_SYSINFO) && !defined(HAVE_SYSTEM_BOOTTIME)
+int check_first(char *lock, struct stat *st) { return 0; }
+
+#else
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <time.h>
+extern int get_uptime(time_t *t);
+
+int check_first(char *lock, struct stat *st) /*EXTRACT_INCL*/{
+  int k;
+  /* If a stat error other than "no such file" occurs, I don't
+     know what went wrong, so I'll proceed with caution by
+     denying the autologin request. */
+  if ((k=stat(lock, st)) && errno != ENOENT)
+    return 0;
+
+  if (k==0) {
+    time_t uptime;
+    if (get_uptime(&uptime))
+      return 0;
+ 
+    /* If there's been an autologin granted since the last boot,
+       deny this and any subsequent attempts.  Note that this test
+       is skipped if the LOCK file doesn't exist. */
+    if (time(0) - uptime < st->st_mtime)
+      return 0;
+  }
+
+  /* Create the LOCK file.  The mtime of this file provides
+     a persistent record of the last time that an autologin
+     request was granted.  Deny the autologin request if either
+     the file open or file close fails. */
+  if ((k=open(lock, O_WRONLY|O_CREAT|O_TRUNC, 0644)) < 0 || close(k))
+    return 0;
+
+  /* All tests are okay, so grant the autologin request. */
+  return 1;
+}
+#endif