Index: b/usr/src/lib/libc/port/gen/execvp.c
===================================================================
--- a/usr/src/lib/libc/port/gen/execvp.c
+++ b/usr/src/lib/libc/port/gen/execvp.c
@@ -104,7 +104,7 @@ execlp(const char *name, const char *arg
 }
 
 int
-execvp(const char *name, char *const *argv)
+execvpe(const char *name, char *const *argv, char *const *envp)
 {
 	const char	*pathstr;
 	char	fname[PATH_MAX+2];
@@ -164,7 +164,10 @@ execvp(const char *name, char *const *ar
 			fname[0] = '.';
 			fname[1] = '/';
 		}
-		(void) execv(fname, argv);
+		if (1 == (uintptr_t)envp)
+			(void) execv(fname, argv);
+		else
+			(void) execve(fname, argv, envp);
 		switch (errno) {
 		case ENOEXEC:
 			newargs[0] = "sh";
@@ -175,7 +178,10 @@ execvp(const char *name, char *const *ar
 					return (-1);
 				}
 			}
-			(void) execv(_PATH_BSHELL, newargs);
+			if (1 == (uintptr_t)envp)
+				(void) execve(_PATH_BSHELL, newargs, envp);
+			else
+				(void) execv(_PATH_BSHELL, newargs);
 			return (-1);
 		case ETXTBSY:
 			if (++etxtbsy > 5)
@@ -196,6 +202,13 @@ execvp(const char *name, char *const *ar
 	return (-1);
 }
 
+int
+execvp(const char *name, char *const *argv)
+{
+	/* 1 is an invalid pointer and means: run ins current environment.  */
+	return execvpe(name, argv, (char * const *)(uintptr_t)1);
+}
+
 static const char *
 execat(const char *s1, const char *s2, char *si)
 {
Index: b/usr/src/lib/libc/port/mapfile-vers
===================================================================
--- a/usr/src/lib/libc/port/mapfile-vers
+++ b/usr/src/lib/libc/port/mapfile-vers
@@ -269,6 +269,7 @@ SYMBOL_VERSION DYSON_1 {
         error_message_count;
         error_one_per_line;
         error_print_progname;
+        execvpe;
         flock;
         fts_children;
         fts_close;
Index: b/usr/src/head/unistd.h
===================================================================
--- a/usr/src/head/unistd.h
+++ b/usr/src/head/unistd.h
@@ -290,6 +290,9 @@ extern int execlp(const char *, const ch
 extern int execv(const char *, char *const *);
 extern int execve(const char *, char *const *, char *const *);
 extern int execvp(const char *, char *const *);
+#if defined(_GNU_SOURCE) || defined(__EXTENSIONS__)
+extern int execvpe(const char *, char *const *, char *const *);
+#endif
 extern void _exit(int)
 	__NORETURN;
 /*