From 38b79bc5f4587d7aec1fc4277c17415eee029b53 Mon Sep 17 00:00:00 2001
From: Steve Grubb <sgrubb@redhat.com>
Date: Thu, 25 May 2023 14:37:58 -0400
Subject: [PATCH] fix compiler warning

---
 src/library/file.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/library/file.c b/src/library/file.c
index f9e9391d..3ea66d8b 100644
--- a/src/library/file.c
+++ b/src/library/file.c
@@ -221,6 +221,9 @@ char *get_file_from_fd(int fd, pid_t pid, size_t blen, char *buf)
 	char procfd_path[32];
 	ssize_t path_len;
 
+	if (blen == 0)
+		return NULL;
+
 	snprintf(procfd_path, sizeof(procfd_path)-1,
 		"/proc/self/fd/%d", fd);
 	path_len = readlink(procfd_path, buf, blen - 1);