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-rw-r--r--src/legacy/cuserid.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/legacy/cuserid.c b/src/legacy/cuserid.c
index 07866acf..dcaf73d4 100644
--- a/src/legacy/cuserid.c
+++ b/src/legacy/cuserid.c
@@ -9,12 +9,13 @@ char *cuserid(char *buf)
 	static char usridbuf[L_cuserid];
 	struct passwd pw, *ppw;
 	long pwb[256];
+	if (buf) *buf = 0;
 	getpwuid_r(geteuid(), &pw, (void *)pwb, sizeof pwb, &ppw);
 	if (!ppw)
-		return 0;
+		return buf;
 	size_t len = strnlen(pw.pw_name, L_cuserid);
 	if (len == L_cuserid)
-		return 0;
+		return buf;
 	if (!buf) buf = usridbuf;
 	memcpy(buf, pw.pw_name, len+1);
 	return buf;