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From e84b6d99c85043fa1ba54851ee500540ec206918 Mon Sep 17 00:00:00 2001
From: Michael Forney <mforney@mforney.org>
Date: Fri, 2 Apr 2021 17:27:48 -0700
Subject: [PATCH] util: Check for NULL string in writefile
This check was there previously, but was removed in f549b757 with
the addition of a check during parse that every rule has rspfile
if and only if it has rspfile_content. However, this fails to
consider the possibility of those variables coming from the edge
or global environment. So, re-add the check.
Fixes #67.
---
util.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/util.c b/util.c
index ea5c3ce..2a59881 100644
--- a/util.c
+++ b/util.c
@@ -258,7 +258,7 @@ writefile(const char *name, struct string *s)
return -1;
}
ret = 0;
- if (fwrite(s->s, 1, s->n, f) != s->n || fflush(f) != 0) {
+ if (s && (fwrite(s->s, 1, s->n, f) != s->n || fflush(f) != 0)) {
warn("write %s:", name);
ret = -1;
}
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