From: Paul Eggert <eggert@cs.ucla.edu>
Date: Wed, 3 Nov 2004 09:24:17 +0000 (+0000)
Subject: xreadlink.c (xreadlink): AIX and HP-UX readlink return -1
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f792a03ccf327e0e80b60e6b7a013e7f89f9f5ca;p=pspp

xreadlink.c (xreadlink): AIX and HP-UX readlink return -1
with errno == ERANGE if the buffer is too small.
---

diff --git a/lib/xreadlink.c b/lib/xreadlink.c
index c38e2d3aad..0f5e7d26f2 100644
--- a/lib/xreadlink.c
+++ b/lib/xreadlink.c
@@ -66,7 +66,9 @@ xreadlink (char const *filename, size_t size)
       ssize_t r = readlink (filename, buffer, buf_size);
       size_t link_length = r;
 
-      if (r < 0)
+      /* On AIX 5L v5.3 and HP-UX 11i v2 04/09, readlink returns -1
+	 with errno == ERANGE if the buffer is too small.  */
+      if (r < 0 && errno != ERANGE)
 	{
 	  int saved_errno = errno;
 	  free (buffer);