From d9f7e29ee5a6915caa049ba64c0a9f28766351d2 Mon Sep 17 00:00:00 2001 From: Eduardo Habkost Date: Wed, 8 Apr 2015 14:57:31 -0300 Subject: [PATCH] qemu-config: Accept empty option values Currently it is impossible to set an option in a config file to an empty string, because the parser matches only lines containing non-empty strings between double-quotes. As sscanf() "[" conversion specifier only matches non-empty strings, add a special case for empty strings. Reviewed-by: Eric Blake Acked-by: Paolo Bonzini Signed-off-by: Eduardo Habkost --- util/qemu-config.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/util/qemu-config.c b/util/qemu-config.c index 2d32ce7e91..a393a3d785 100644 --- a/util/qemu-config.c +++ b/util/qemu-config.c @@ -413,7 +413,9 @@ int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname) opts = qemu_opts_create(list, NULL, 0, &error_abort); continue; } - if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) { + value[0] = '\0'; + if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2 || + sscanf(line, " %63s = \"\"", arg) == 1) { /* arg = value */ if (opts == NULL) { error_report("no group defined"); -- 2.11.0