tools: xl: more const-correctness

The implementation of xl was lacking a lot of consts on its char*s.
In this patch we improve matters.  It doesn't fix everything.  In
particular:

  * I only changed char*s and not other structs that ought to be const.

  * libxl_send_debug_keys should take a const char* but the pointer
    ends up getting sent to DECLARE_HYPERCALL_BOUNCE from xc_private.h
    and that won't take a const char*.  I wasn't sure what to do so
    I have left it.

  * There is a great deal of in-place string tokenisation (both
    ad-hoc, and using strtok_r).  I haven't changed any of that.

  * I haven't changed any of the occurrences of char **argv because of
    the castless assignment incompatibility between const char** and
    char **.

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/tools/libxl/xl.h b/tools/libxl/xl.h
index cc935085aa..69eb9dfc88 100644
--- a/tools/libxl/xl.h
+++ b/tools/libxl/xl.h
@@ -86,7 +86,7 @@ int main_cpupoolcpuadd(int argc, char **argv);
 int main_cpupoolcpuremove(int argc, char **argv);
 int main_cpupoolmigrate(int argc, char **argv);
 
-void help(char *command);
+void help(const char *command);
 
 extern struct cmd_spec cmd_table[];
 extern int cmdtable_len;