From: Martin Mares <mj@ucw.cz>
Date: Tue, 12 Mar 2024 19:47:28 +0000 (+0100)
Subject: sysfs: Avoid close() potentially clobbering errno
X-Git-Tag: v3.13.0~33
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=9b31027f1d78c75bc41c5511ca50545a66229b59;p=pciutils.git

sysfs: Avoid close() potentially clobbering errno
---

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);