From 9b31027f1d78c75bc41c5511ca50545a66229b59 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Tue, 12 Mar 2024 20:47:28 +0100
Subject: sysfs: Avoid close() potentially clobbering errno

---
 lib/sysfs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/sysfs.c b/lib/sysfs.c
index cd2379e..48ed6da 100644
--- a/lib/sysfs.c
+++ b/lib/sysfs.c
@@ -105,12 +105,13 @@ sysfs_get_string(struct pci_dev *d, char *object, char *buf, int mandatory)
       return 0;
     }
   n = read(fd, buf, OBJBUFSIZE);
+  int read_errno = errno;
   close(fd);
   if (n < 0)
     {
-      warn("Error reading %s: %s", namebuf, strerror(errno));
+      warn("Error reading %s: %s", namebuf, strerror(read_errno));
       return 0;
-     }
+    }
   if (n >= OBJBUFSIZE)
     {
       warn("Value in %s too long", namebuf);
-- 
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