On Fri, Nov 23, 2012 at 07:12:17PM +0100, Markus Armbruster wrote: > diff --git a/hw/pc_sysfw.c b/hw/pc_sysfw.c > index 9d7c5f4..066c4fe 100644 > --- a/hw/pc_sysfw.c > +++ b/hw/pc_sysfw.c > @@ -84,6 +84,11 @@ static void pc_fw_add_pflash_drv(void) > bios_name = BIOS_FILENAME; > } > filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); > + if (!filename) { > + error_report("Can't open BIOS image %s: %s", > + bios_name, strerror(errno));
qemu_find_file() does not document that errno is set when returning NULL. I can't find other callers to qemu_find_file() that use errno either. Please add a doc comment to qemu_find_file() that errno will be set on NULL return, otherwise we can't rely on it in the caller. Stefan