[PATCH] Check for only regular files, not devices

[Stas Maximov]

>From 350a7ce8fd29a7c225bea2ecb7e2443ee6269ea7 Mon Sep 17 00:00:00 2001
From: Stas Maximov <address@hidden>
Date: Sat, 31 May 2008 14:14:31 -0700
Subject: [PATCH] Check for only regular files, not devices

* libltdl/config/ltmain.m4sh, functions func_lalib_p () and
  func_lalib_unsafe_p () should try reading only regular files and not
  device files. This will avoid blocking libtool executing gdb, when
  a pseudo-terminal device /dev/pts/NN is given as one of the arguments
  to gdb: libtool --mode=execute gdb -q -nw -i mi -tty /dev/pts/4 prog

Signed-off-by: Stas Maximov <address@hidden>
---
 libltdl/config/ltmain.m4sh |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/libltdl/config/ltmain.m4sh b/libltdl/config/ltmain.m4sh
index 144bc76..5638b2e 100644
--- a/libltdl/config/ltmain.m4sh
+++ b/libltdl/config/ltmain.m4sh
@@ -451,8 +451,9 @@ $opt_help || {
 # determined imposters.
 func_lalib_p ()
 {
-    $SED -e 4q "$1" 2>/dev/null \
-      | $GREP "^# Generated by .*$PACKAGE" > /dev/null 2>&1
+    test -f "$1" && 
+      $SED -e 4q "$1" 2>/dev/null \
+        | $GREP "^# Generated by .*$PACKAGE" > /dev/null 2>&1
 }
 
 # func_lalib_unsafe_p file
@@ -465,7 +466,7 @@ func_lalib_p ()
 func_lalib_unsafe_p ()
 {
     lalib_p=no
-    if test -r "$1" && exec 5<&0 <"$1"; then
+    if test -f "$1" -a -r "$1" && exec 5<&0 <"$1"; then
     for lalib_p_l in 1 2 3 4
     do
         read lalib_p_line
-- 
1.5.5.1