xl: Remove some duplicated boilerplate. (Improves logging slightly.)

We remove six lines of boilerplate from the top of each function, and
instead have a single struct libxl_ctx which is initialised once at
the top of main.

Likewise we wrap domain_qualifier_to_domid in a new function
find_domain, which does the error handling, and stores the domid and
the specified name (if applicable).

This reduces the size of xl.c by 7% (!)

As a beneficial side effect, the earlier call to libxl_ctx_set_log in
main makes some lost messages appear.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/tools/libxl/libxl_utils.h b/tools/libxl/libxl_utils.h
index 4c04c46dea..5d8018109a 100644
--- a/tools/libxl/libxl_utils.h
+++ b/tools/libxl/libxl_utils.h
@@ -19,7 +19,7 @@
 #include "libxl.h"
 
 unsigned long libxl_get_required_shadow_memory(unsigned long maxmem_kb, unsigned int smp_cpus);
-int libxl_name_to_domid(struct libxl_ctx *ctx, char *name, uint32_t *domid);
+int libxl_name_to_domid(struct libxl_ctx *ctx, const char *name, uint32_t *domid);
 char *libxl_domid_to_name(struct libxl_ctx *ctx, uint32_t domid);
 int libxl_get_stubdom_id(struct libxl_ctx *ctx, int guest_domid);
 int libxl_is_stubdom(struct libxl_ctx *ctx, uint32_t domid, uint32_t *target_domid);