From ae160215ca02b2d48568dc595e0c8861900ed73c Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Sat, 21 Jan 2017 05:22:36 -0500
Subject: [PATCH] RHEL 5: p2v: Workarounds for limited partial match support in
 ancient PCRE.

In the ancient version of PCRE in RHEL 5, partial match support does
not support /.*/, returning PCRE_ERROR_BADPARTIAL.  However the
equivalent regular expression /(?:.)*/ works fine, so use that
instead.
---
 p2v/ssh.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/p2v/ssh.c b/p2v/ssh.c
index 9961e7a93..2dbc109d4 100644
--- a/p2v/ssh.c
+++ b/p2v/ssh.c
@@ -163,15 +163,21 @@ compile_regexps (void)
   } while (0)
 
   COMPILE (password_re, "password:", 0);
-  COMPILE (ssh_message_re, "(ssh: .*)", 0);
+  /* Note that (?:.)* is required in order to work around a problem
+   * with partial matching and PCRE in RHEL 5.
+   */
+  COMPILE (ssh_message_re, "(ssh: (?:.)*)", 0);
   COMPILE (sudo_password_re, "sudo: a password is required", 0);
   /* The magic synchronization strings all match this expression.  See
    * start_ssh function below.
    */
   COMPILE (prompt_re,
 	   "###((?:[0123456789abcdefghijklmnopqrstuvwxyz]){8})### ", 0);
+  /* Note that (?:.)* is required in order to work around a problem
+   * with partial matching and PCRE in RHEL 5.
+   */
   COMPILE (version_re,
-           "virt-v2v ([1-9].*)",
+           "virt-v2v ([1-9](?:.)*)",
 	   0);
   COMPILE (feature_libguestfs_rewrite_re, "libguestfs-rewrite", 0);
   COMPILE (feature_colours_option_re, "colours-option", 0);