From d21dd12d90f94e86ef67d27abe1c20b2df06fc05 Mon Sep 17 00:00:00 2001
From: Gerd Moellmann <gerd@gnu.org>
Date: Wed, 18 Apr 2001 15:34:35 +0000
Subject: [PATCH] (Finsert_file_contents): If the file size returned from stat
is zero, set END to READ_BUF_SIZE. This makes sure we can read from files on
a procfs whose contents are generated dynamically.
---
src/fileio.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/fileio.c b/src/fileio.c
index 84a0c6c625c..8b6c0bd165a 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -3589,6 +3589,12 @@ actually used.")
if (XINT (end) != st.st_size
|| ((int) st.st_size * 4) / 4 != st.st_size)
error ("Maximum buffer size exceeded");
+
+ /* The file size returned from stat may be zero, but data
+ may be readable nonetheless, for example when this is a
+ file in the /proc filesystem. */
+ if (st.st_size == 0)
+ XSETINT (end, READ_BUF_SIZE);
}
}
--
2.39.5