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 c38e2d3aad892630f37d84b906b272f93ad7f925..0f5e7d26f2fcd7d27ff462160e0437592d4cf6db 100644 (file)
--- 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);