summaryrefslogtreecommitdiffstats
path: root/libmisc/hushed.c
diff options
context:
space:
mode:
Diffstat (limited to 'libmisc/hushed.c')
-rw-r--r--libmisc/hushed.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/libmisc/hushed.c b/libmisc/hushed.c
new file mode 100644
index 0000000..b71b99c
--- /dev/null
+++ b/libmisc/hushed.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 1991 - 1993, Julianne Frances Haugh
+ * Copyright (c) 1991 - 1993, Chip Rosenthal
+ * Copyright (c) 1996 - 2000, Marek Michałkiewicz
+ * Copyright (c) 2003 - 2005, Tomasz Kłoczko
+ * Copyright (c) 2008 - 2010, Nicolas François
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not be used to
+ * endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <pwd.h>
+#include "defines.h"
+#include "prototypes.h"
+#include "getdef.h"
+/*
+ * hushed - determine if a user receives login messages
+ *
+ * Look in the hushed-logins file (or user's home directory) to see
+ * if the user is to receive the login-time messages.
+ */
+bool hushed (const char *username)
+{
+ struct passwd *pw;
+ const char *hushfile;
+ char buf[BUFSIZ];
+ bool found;
+ FILE *fp;
+
+ /*
+ * Get the name of the file to use. If this option is not
+ * defined, default to a noisy login.
+ */
+
+ hushfile = getdef_str ("HUSHLOGIN_FILE");
+ if (NULL == hushfile) {
+ return false;
+ }
+
+ pw = getpwnam (username);
+ if (NULL == pw) {
+ return false;
+ }
+
+ /*
+ * If this is not a fully rooted path then see if the
+ * file exists in the user's home directory.
+ */
+
+ if (hushfile[0] != '/') {
+ (void) snprintf (buf, sizeof (buf), "%s/%s", pw->pw_dir, hushfile);
+ return (access (buf, F_OK) == 0);
+ }
+
+ /*
+ * If this is a fully rooted path then go through the file
+ * and see if this user, or its shell is in there.
+ */
+
+ fp = fopen (hushfile, "r");
+ if (NULL == fp) {
+ return false;
+ }
+ for (found = false; !found && (fgets (buf, (int) sizeof buf, fp) == buf);) {
+ buf[strlen (buf) - 1] = '\0';
+ found = (strcmp (buf, pw->pw_shell) == 0) ||
+ (strcmp (buf, pw->pw_name) == 0);
+ }
+ (void) fclose (fp);
+ return found;
+}
+