2 files changed, 4 insertions, 1 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 0840e5ec9f0..266ff2f58a6 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,6 +1,7 @@
 2011-03-14  Paul Eggert  <eggert@cs.ucla.edu>
 
         * sysdep.c (system_process_attributes): Rename vars to avoid shadowing.
+        Fix pointer signedness issue.
 
         * process.c (serial_open, serial_configure): Move decls from here ...
         * systty.h: ... to here, so that they can be checked.
diff --git a/src/sysdep.c b/src/sysdep.c
index b8fbf863074..e19f9ca829e 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -2845,8 +2845,10 @@ system_process_attributes (Lisp_Object pid)
   fd = emacs_open (fn, O_RDONLY, 0);
   if (fd >= 0)
     {
-      for (cmdline_size = 0; emacs_read (fd, &c, 1) == 1; cmdline_size++)
+      char ch;
+      for (cmdline_size = 0; emacs_read (fd, &ch, 1) == 1; cmdline_size++)
         {
+          c = ch;
           if (isspace (c) || c == '\\')
             cmdline_size++;     /* for later quoting, see below */
         }