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-rw-r--r--libmisc/hushed.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/libmisc/hushed.c b/libmisc/hushed.c
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+/*
+ * SPDX-FileCopyrightText: 1991 - 1993, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1991 - 1993, Chip Rosenthal
+ * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008 - 2010, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#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[strcspn (buf, "\n")] = '\0';
+ found = (strcmp (buf, pw->pw_shell) == 0) ||
+ (strcmp (buf, pw->pw_name) == 0);
+ }
+ (void) fclose (fp);
+ return found;
+}
+