1 files changed, 60 insertions, 0 deletions
diff --git a/examples/check_user.c b/examples/check_user.c
new file mode 100644
index 0000000..89cc137
--- /dev/null
+++ b/examples/check_user.c
@@ -0,0 +1,60 @@
+/*
+  $Id$
+
+  This program was contributed by Shane Watts <shane@icarus.bofh.asn.au>
+  slight modifications by AGM.
+
+  You need to add the following (or equivalent) to the /etc/pam.conf file.
+  # check authorization
+  check   auth       required     pam_unix_auth.so
+  check   account    required     pam_unix_acct.so
+*/
+
+#include <security/pam_appl.h>
+#include <security/pam_misc.h>
+#include <stdio.h>
+
+static struct pam_conv conv = {
+    misc_conv,
+    NULL
+};
+
+int main(int argc, char *argv[])
+{
+    pam_handle_t *pamh=NULL;
+    int retval;
+    const char *user="nobody";
+
+    if(argc == 2) {
+	user = argv[1];
+    }
+
+    if(argc > 2) {
+	fprintf(stderr, "Usage: check_user [username]\n");
+	exit(1);
+    }
+
+    retval = pam_start("check", user, &conv, &pamh);
+
+    if (retval == PAM_SUCCESS)
+        retval = pam_authenticate(pamh, 0);    /* is user really user? */
+
+    if (retval == PAM_SUCCESS)
+        retval = pam_acct_mgmt(pamh, 0);       /* permitted access? */
+
+    /* This is where we have been authorized or not. */
+
+    if (retval == PAM_SUCCESS) {
+	fprintf(stdout, "Authenticated\n");
+    } else {
+	fprintf(stdout, "Not Authenticated\n");
+    }
+
+    if (pam_end(pamh,retval) != PAM_SUCCESS) {     /* close Linux-PAM */
+	pamh = NULL;
+	fprintf(stderr, "check_user: failed to release authenticator\n");
+	exit(1);
+    }
+
+    return ( retval == PAM_SUCCESS ? 0:1 );       /* indicate success */
+}