RunApp: safer chdir. Overhauled "sparn a child and get its output" in general

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/Utils/xfuncs.cpp b/lib/Utils/xfuncs.cpp
index 8621b5f..3ab3739 100644
--- a/lib/Utils/xfuncs.cpp
+++ b/lib/Utils/xfuncs.cpp
@@ -141,6 +141,12 @@ off_t xlseek(int fd, off_t offset, int whence)
 	return off;
 }
 
+void xchdir(const char *path)
+{
+	if (chdir(path))
+		perror_msg_and_die("chdir(%s)", path);
+}
+
 char* xvasprintf(const char *format, va_list p)
 {
 	int r;