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nixpkgs/pkgs/misc/drivers/epkowa/sscanf.patch
Dominik Honnef e22eb2d7b5
epkowa: fix parsing of interpreters (#82909)
Building with -std=c99 breaks the obsolete "%as" format string, which
completely breaks the parsing of epkowa interpreters. This means that
no scanner requiring plugins worked.
2020-03-19 13:40:45 -04:00

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Diff

The "%as" verb requests sscanf to allocate a buffer for us. However,
this use of 'a' has been long deprecated, and gcc doesn't support it
in this manner when using -std=c99. The modern replacement is "%ms".
Without this change, iscan couldn't read the interpreter file, in turn
breaking all scanners that require plugins.
--- backend/cfg-obj.c.orig 2020-03-19 01:27:17.254762077 +0100
+++ backend/cfg-obj.c 2020-03-19 02:01:52.293329873 +0100
@@ -1026,7 +1026,7 @@
char *vendor = NULL;
char *model = NULL;
- sscanf (string, "%*s %as %as", &vendor, &model);
+ sscanf (string, "%*s %ms %ms", &vendor, &model);
if (list_append (_cfg->seen[CFG_KEY_SCSI], info))
{
@@ -1108,10 +1112,10 @@
char *library = NULL;
char *firmware = NULL;
- sscanf (string, "%*s %*s %x %x %as %as",
+ sscanf (string, "%*s %*s %x %x %ms %ms",
&vendor, &product, &library, &firmware);
if (library && _cfg_have_interpreter (library, firmware)
&& list_append (_cfg->seen[CFG_KEY_INTERPRETER], info))
{