1 files changed, 32 insertions, 0 deletions
diff --git a/manual/examples/genpass.c b/manual/examples/genpass.c
new file mode 100644
index 0000000..a7626db
--- /dev/null
+++ b/manual/examples/genpass.c
@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <time.h>
+#include <unistd.h>
+#include <crypt.h>
+
+int 
+main(void)
+{
+  unsigned long seed[2];
+  char salt[] = "$1$........";
+  const char *const seedchars = 
+    "./0123456789ABCDEFGHIJKLMNOPQRST"
+    "UVWXYZabcdefghijklmnopqrstuvwxyz";
+  char *password;
+  int i;
+  
+  /* Generate a (not very) random seed.  
+     You should do it better than this...  */
+  seed[0] = time(NULL);
+  seed[1] = getpid() ^ (seed[0] >> 14 & 0x30000);
+  
+  /* Turn it into printable characters from `seedchars'.  */
+  for (i = 0; i < 8; i++)
+    salt[3+i] = seedchars[(seed[i/5] >> (i%5)*6) & 0x3f];
+  
+  /* Read in the user's password and encrypt it.  */
+  password = crypt(getpass("Password:"), salt);
+  
+  /* Print the results.  */
+  puts(password);
+  return 0;
+}