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-rw-r--r--libpam/pam_syslog.c115
1 files changed, 115 insertions, 0 deletions
diff --git a/libpam/pam_syslog.c b/libpam/pam_syslog.c
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+++ b/libpam/pam_syslog.c
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+/*
+ * 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, and the entire permission notice in its entirety,
+ * including the disclaimer of warranties.
+ * 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 author may not be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * ALTERNATIVELY, this product may be distributed under the terms of
+ * the GNU Public License, in which case the provisions of the GPL are
+ * required INSTEAD OF the above restrictions. (This clause is
+ * necessary due to a potential bad interaction between the GPL and
+ * the restrictions contained in a BSD-style copyright.)
+ *
+ * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <errno.h>
+
+#include <security/pam_modules.h>
+#include <security/_pam_macros.h>
+#include <security/pam_ext.h>
+
+#include "pam_private.h"
+
+#ifndef LOG_AUTHPRIV
+#define LOG_AUTHPRIV LOG_AUTH
+#endif
+
+static const char *
+_pam_choice2str (int choice)
+{
+ switch (choice)
+ {
+ case PAM_AUTHENTICATE:
+ return "auth";
+ case PAM_SETCRED:
+ return "setcred";
+ case PAM_ACCOUNT:
+ return "account";
+ case PAM_OPEN_SESSION:
+ case PAM_CLOSE_SESSION:
+ return "session";
+ case PAM_CHAUTHTOK:
+ return "chauthtok";
+ }
+ return "";
+}
+
+void
+pam_vsyslog (const pam_handle_t *pamh, int priority,
+ const char *fmt, va_list args)
+{
+ char *msgbuf1 = NULL, *msgbuf2 = NULL;
+ int save_errno = errno;
+
+ if (pamh && pamh->mod_name)
+ {
+ if (asprintf (&msgbuf1, "%s(%s:%s):", pamh->mod_name,
+ pamh->service_name?pamh->service_name:"<unknown>",
+ _pam_choice2str (pamh->choice)) < 0)
+ {
+ syslog (LOG_AUTHPRIV|LOG_ERR, "asprintf: %m");
+ return;
+ }
+ }
+
+ errno = save_errno;
+ if (vasprintf (&msgbuf2, fmt, args) < 0)
+ {
+ syslog (LOG_AUTHPRIV|LOG_ERR, "vasprintf: %m");
+ _pam_drop (msgbuf1);
+ return;
+ }
+
+ errno = save_errno;
+ syslog (LOG_AUTHPRIV|priority, "%s %s",
+ (msgbuf1 ? msgbuf1 : _PAM_SYSTEM_LOG_PREFIX), msgbuf2);
+
+ _pam_drop (msgbuf1);
+ _pam_drop (msgbuf2);
+}
+
+void
+pam_syslog (const pam_handle_t *pamh, int priority,
+ const char *fmt, ...)
+{
+ va_list args;
+
+ va_start (args, fmt);
+ pam_vsyslog (pamh, priority, fmt, args);
+ va_end (args);
+}