1 files changed, 130 insertions, 0 deletions
diff --git a/Linux-PAM/modules/pam_motd/pam_motd.c b/Linux-PAM/modules/pam_motd/pam_motd.c
new file mode 100644
index 00000000..abf10a2f
--- /dev/null
+++ b/Linux-PAM/modules/pam_motd/pam_motd.c
@@ -0,0 +1,130 @@
+/* pam_motd module */
+
+/*
+ * Modified for pam_motd by Ben Collins <bcollins@debian.org>
+ *
+ * Based off of:
+ * $Id: pam_motd.c,v 1.12 2005/10/04 11:35:18 ldv Exp $
+ *
+ * Written by Michael K. Johnson <johnsonm@redhat.com> 1996/10/24
+ *
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <pwd.h>
+#include <syslog.h>
+
+#include <security/_pam_macros.h>
+#include <security/pam_ext.h>
+/*
+ * here, we make a definition for the externally accessible function
+ * in this file (this definition is required for static a module
+ * but strongly encouraged generally) it is used to instruct the
+ * modules include file to define the function prototypes.
+ */
+
+#define PAM_SM_SESSION
+#define DEFAULT_MOTD	"/etc/motd"
+
+#include <security/pam_modules.h>
+#include <security/pam_modutil.h>
+
+/* --- session management functions (only) --- */
+
+PAM_EXTERN int
+pam_sm_close_session (pam_handle_t *pamh UNUSED, int flags UNUSED,
+		      int argc UNUSED, const char **argv UNUSED)
+{
+     return PAM_IGNORE;
+}
+
+static char default_motd[] = DEFAULT_MOTD;
+
+PAM_EXTERN
+int pam_sm_open_session(pam_handle_t *pamh, int flags,
+			int argc, const char **argv)
+{
+    int retval = PAM_IGNORE;
+    int fd;
+    const char *motd_path = NULL;
+    char *mtmp = NULL;
+
+    if (flags & PAM_SILENT) {
+	return retval;
+    }
+
+    for (; argc-- > 0; ++argv) {
+        if (!strncmp(*argv,"motd=",5)) {
+
+            motd_path = 5 + *argv;
+            if (*motd_path != '\0') {
+                D(("set motd path: %s", motd_path));
+	    } else {
+		motd_path = NULL;
+		pam_syslog(pamh, LOG_ERR,
+			   "motd= specification missing argument - ignored");
+	    }
+	}
+	else
+	    pam_syslog(pamh, LOG_ERR, "unknown option: %s", *argv);
+    }
+
+    if (motd_path == NULL)
+	motd_path = default_motd;
+
+    while ((fd = open(motd_path, O_RDONLY, 0)) >= 0) {
+	struct stat st;
+
+	/* fill in message buffer with contents of motd */
+	if ((fstat(fd, &st) < 0) || !st.st_size || st.st_size > 0x10000)
+	    break;
+
+	if (!(mtmp = malloc(st.st_size+1)))
+	    break;
+
+	if (pam_modutil_read(fd, mtmp, st.st_size) != st.st_size)
+	    break;
+
+	if (mtmp[st.st_size-1] == '\n')
+	    mtmp[st.st_size-1] = '\0';
+	else
+	    mtmp[st.st_size] = '\0';
+
+	pam_info (pamh, "%s", mtmp);
+	break;
+    }
+
+    _pam_drop (mtmp);
+
+    if (fd >= 0)
+	close(fd);
+
+     return retval;
+}
+
+
+#ifdef PAM_STATIC
+
+/* static module data */
+
+struct pam_module _pam_motd_modstruct = {
+     "pam_motd",
+     NULL,
+     NULL,
+     NULL,
+     pam_sm_open_session,
+     pam_sm_close_session,
+     NULL,
+};
+
+#endif
+
+/* end of module definition */