D55484.diff
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	diff --git a/lib/libc/stdlib/system.c b/lib/libc/stdlib/system.c
	--- a/lib/libc/stdlib/system.c
	+++ b/lib/libc/stdlib/system.c
	@@ -64,7 +64,7 @@
	pid_t pid;

	if (command == NULL) /* just checking... */
	- return (1);
	+ return (eaccess(_PATH_BSHELL, X_OK) == 0);

	/*
	* If we are the first concurrent instance, ignore SIGINT and
	diff --git a/lib/libc/tests/stdlib/system_test.c b/lib/libc/tests/stdlib/system_test.c
	--- a/lib/libc/tests/stdlib/system_test.c
	+++ b/lib/libc/tests/stdlib/system_test.c
	@@ -57,10 +57,20 @@
	ATF_TC_HEAD(system_null, tc)
	{
	atf_tc_set_md_var(tc, "descr", "system(NULL)");
	+ atf_tc_set_md_var(tc, "require.user", "root");
	}
	ATF_TC_BODY(system_null, tc)
	{
	+ /* First, test in a normal environment */
	ATF_REQUIRE_EQ(1, system(NULL));
	+
	+ /* Now enter an empty chroot */
	+ ATF_REQUIRE_EQ(0, chroot("."));
	+ ATF_REQUIRE_EQ(0, chdir("/"));
	+
	+ /* Test again with no shell available */
	+ ATF_REQUIRE_EQ(0, system(NULL));
	+ ATF_REQUIRE_EQ(W_EXITCODE(127, 0), system("true"));
	}

	/*