[PATCH 15/24] libxl: remove ctx->waitpid_instead

[Ian Jackson <ian.jackson@eu.citrix.com>]

Remove this obsolete hook.  Callers inside libxl which create and reap
children should use the mechanisms provided by the event system.

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
---
 tools/libxl/libxl_exec.c     |   12 +++---------
 tools/libxl/libxl_internal.h |    3 ---
 2 files changed, 3 insertions(+), 12 deletions(-)

diff --git a/tools/libxl/libxl_exec.c b/tools/libxl/libxl_exec.c
index b10e79f..2ee2154 100644
--- a/tools/libxl/libxl_exec.c
+++ b/tools/libxl/libxl_exec.c
@@ -19,11 +19,6 @@
 
 #include "libxl_internal.h"
 
-static int call_waitpid(pid_t (*waitpid_cb)(pid_t, int *, int), pid_t pid, int *status, int options)
-{
-    return (waitpid_cb) ? waitpid_cb(pid, status, options) : waitpid(pid, status, options);
-}
-
 static void check_open_fds(const char *what)
 {
     const char *env_debug;
@@ -344,7 +339,7 @@ int libxl__spawn_spawn(libxl__gc *gc,
 
     if (!for_spawn) _exit(0); /* just detach then */
 
-    got = call_waitpid(ctx->waitpid_instead, child, &status, 0);
+    got = waitpid(child, &status, 0);
     assert(got == child);
 
     rc = (WIFEXITED(status) ? WEXITSTATUS(status) :
@@ -404,7 +399,7 @@ int libxl__spawn_detach(libxl__gc *gc,
                          (unsigned long)for_spawn->intermediate);
             abort(); /* things are very wrong */
         }
-        got = call_waitpid(ctx->waitpid_instead, for_spawn->intermediate, &status, 0);
+        got = waitpid(for_spawn->intermediate, &status, 0);
         assert(got == for_spawn->intermediate);
         if (!(WIFSIGNALED(status) && WTERMSIG(status) == SIGKILL)) {
             report_spawn_intermediate_status(gc, for_spawn, status);
@@ -421,14 +416,13 @@ int libxl__spawn_detach(libxl__gc *gc,
 
 int libxl__spawn_check(libxl__gc *gc, libxl__spawn_starting *for_spawn)
 {
-    libxl_ctx *ctx = libxl__gc_owner(gc);
     pid_t got;
     int status;
 
     if (!for_spawn) return 0;
 
     assert(for_spawn->intermediate);
-    got = call_waitpid(ctx->waitpid_instead, for_spawn->intermediate, &status, WNOHANG);
+    got = waitpid(for_spawn->intermediate, &status, WNOHANG);
     if (!got) return 0;
 
     assert(got == for_spawn->intermediate);
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index 74dc2c5..ae71f70 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -334,9 +334,6 @@ struct libxl__ctx {
     int sigchld_selfpipe[2]; /* [0]==-1 means handler not installed */
     LIBXL_LIST_HEAD(, libxl__ev_child) children;
 
-    /* This is obsolete and must be removed: */
-    int (*waitpid_instead)(pid_t pid, int *status, int flags);
-
     libxl_version_info version_info;
 };
 
-- 
1.7.2.5