Move platform_disable_tracing into its own file.

Prevents link errors resolving the extern "options" when platform.o
gets linked into ssh-agent when building --with-pam.

1 files changed, 43 insertions, 0 deletions

diff --git a/platform-tracing.c b/platform-tracing.c
new file mode 100644
index 000000000..81020e7f7
--- /dev/null
+++ b/platform-tracing.c
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2016 Darren Tucker.  All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "includes.h"
+
+#include <sys/types.h>
+#if defined(HAVE_SYS_PRCTL_H)
+#include <sys/prctl.h>  /* For prctl() and PR_SET_DUMPABLE */
+#endif
+#ifdef HAVE_PRIV_H
+#include <priv.h> /* For setpflags() and __PROC_PROTECT  */
+#endif
+#include <stdarg.h>
+
+#include "log.h"
+
+void
+platform_disable_tracing(int strict)
+{
+#if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE)
+        /* Disable ptrace on Linux without sgid bit */
+        if (prctl(PR_SET_DUMPABLE, 0) != 0 && strict)
+                fatal("unable to make the process undumpable");
+#endif
+#if defined(HAVE_SETPFLAGS) && defined(__PROC_PROTECT)
+        /* On Solaris, we should make this process untraceable */
+        if (setpflags(__PROC_PROTECT, 1) != 0 && strict)
+                fatal("unable to make the process untraceable");
+#endif
+}