- patch from Denis Vlasenko to add and use bb_xchdir()

libbb/Makefile.in

@@ -30,7 +30,7 @@ LIBBB-y:= \
 	trim.c u_signal_names.c vdprintf.c verror_msg.c \
 	vherror_msg.c vperror_msg.c wfopen.c xconnect.c xgetcwd.c xstat.c \
 	xgethostbyname.c xgethostbyname2.c xreadlink.c xregcomp.c xgetlarg.c \
-	bb_xsocket.c bb_xdaemon.c bb_xbind.c bb_xlisten.c \
+	bb_xsocket.c bb_xdaemon.c bb_xbind.c bb_xlisten.c bb_xchdir.c \
 	get_terminal_width_height.c fclose_nonstdin.c fflush_stdout_and_exit.c \
 	getopt_ulflags.c default_error_retval.c wfopen_input.c speed_table.c \
 	perror_nomsg_and_die.c perror_nomsg.c skip_whitespace.c bb_askpass.c \

libbb/bb_xchdir.c

@@ -0,0 +1,17 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * bb_xchdir.c - a chdir() which dies on failure with error message
+ *
+ * Copyright (C) 2006 Denis Vlasenko
+ *
+ * Licensed under LGPL, see file docs/lesser.txt in this tarball for details.
+ */
+#include <unistd.h>
+#include "libbb.h"
+
+void bb_xchdir(const char *path)
+{
+	if (chdir(path))
+		bb_perror_msg_and_die("chdir(%s)", path);
+}
+