1 files changed, 68 insertions, 0 deletions

diff --git a/lib/libpthread/thread/thr_execve.c b/lib/libpthread/thread/thr_execve.c
new file mode 100644
index 000000000000..db5b8587e123
--- /dev/null
+++ b/lib/libpthread/thread/thr_execve.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2004 Daniel Eischen <deischen@freebsd.org>
+ * 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(s), this list of conditions and the following disclaimer as
+ *    the first lines of this file unmodified other than the possible
+ *    addition of one or more copyright notices.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice(s), this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``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 HOLDER(S) 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <errno.h>
+#include <pthread.h>
+#include <unistd.h>
+#include "thr_private.h"
+
+__weak_reference(_execve, execve);
+
+int 
+_execve(const char *name, char *const *argv, char *const *envp)
+{
+	sigset_t omask;
+	struct pthread *curthread;
+	kse_critical_t crit;
+	int saved_errno;
+	int ret;
+
+	/*
+	 * When exec'ing, set the kernel signal mask to the thread's
+	 * signal mask to satisfy POSIX requirements.  We have to enter
+	 * a critical region so that the kernel thread doesn't get
+	 * changed out from under us after setting the signal mask.
+	 */
+	curthread = _get_curthread();
+	crit = _kse_critical_enter();
+	__sys_sigprocmask(SIG_SETMASK, &curthread->sigmask, &omask);
+	 ret = __sys_execve(name, argv, envp);
+
+	/*
+	 * If something went wrong, set the signal mask back but don't
+	 * destroy errno.
+	 */
+	saved_errno = errno;
+	__sys_sigprocmask(SIG_SETMASK, &omask, NULL);
+	errno = saved_errno;
+	_kse_critical_leave(crit);
+	return (ret);
+}