[PATCH 07/11] libxl: Expose libxl_report_exitstatus

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

xl would like to use libxl_report_exitstatus, so expose it in
libxl_utils.h to avoid having to write it twice.  Also, give it a
"level" argument to set the loglevel of the resulting message.

Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
---
 tools/libxl/libxl_exec.c     |   16 +++++++---------
 tools/libxl/libxl_internal.h |    5 -----
 tools/libxl/libxl_utils.h    |   11 +++++++++++
 3 files changed, 18 insertions(+), 14 deletions(-)

diff --git a/tools/libxl/libxl_exec.c b/tools/libxl/libxl_exec.c
index 6d4a5c5..52dda97 100644
--- a/tools/libxl/libxl_exec.c
+++ b/tools/libxl/libxl_exec.c
@@ -57,34 +57,32 @@ void libxl_exec(int stdinfd, int stdoutfd, int stderrfd, char *arg0, char **args
     _exit(-1);
 }
 
-void libxl_report_child_exitstatus(struct libxl_ctx *ctx,
+void libxl_report_child_exitstatus(struct libxl_ctx *ctx, int level,
                                    const char *what, pid_t pid, int status)
 {
-    /* treats all exit statuses as errors; if that's not what you want,
-     * check status yourself first */
 
     if (WIFEXITED(status)) {
         int st = WEXITSTATUS(status);
         if (st)
-            XL_LOG(ctx, XL_LOG_ERROR, "%s [%ld] exited"
+            XL_LOG(ctx, level, "%s [%ld] exited"
                    " with error status %d", what, (unsigned long)pid, st);
         else
-            XL_LOG(ctx, XL_LOG_ERROR, "%s [%ld] unexpectedly"
+            XL_LOG(ctx, level, "%s [%ld] unexpectedly"
                    " exited status zero", what, (unsigned long)pid);
     } else if (WIFSIGNALED(status)) {
         int sig = WTERMSIG(status);
         const char *str = strsignal(sig);
         const char *coredump = WCOREDUMP(status) ? " (core dumped)" : "";
         if (str)
-            XL_LOG(ctx, XL_LOG_ERROR, "%s [%ld] died due to"
+            XL_LOG(ctx, level, "%s [%ld] died due to"
                    " fatal signal %s%s", what, (unsigned long)pid,
                    str, coredump);
         else
-            XL_LOG(ctx, XL_LOG_ERROR, "%s [%ld] died due to unknown"
+            XL_LOG(ctx, level, "%s [%ld] died due to unknown"
                    " fatal signal number %d%s", what, (unsigned long)pid,
                    sig, coredump);
     } else {
-        XL_LOG(ctx, XL_LOG_ERROR, "%s [%ld] gave unknown"
+        XL_LOG(ctx, level, "%s [%ld] gave unknown"
                " wait status 0x%x", what, (unsigned long)pid, status);
     }
 }
@@ -145,7 +143,7 @@ static void report_spawn_intermediate_status(struct libxl_ctx *ctx,
         char *intermediate_what = libxl_sprintf(ctx,
                           "%s intermediate process (startup monitor)",
                           for_spawn->what);
-        libxl_report_child_exitstatus(ctx, intermediate_what,
+        libxl_report_child_exitstatus(ctx, XL_LOG_ERROR, intermediate_what,
                                       for_spawn->intermediate, status);
     }
 }
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index 10e72e5..d1e355c 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -49,11 +49,6 @@
 #endif
   /* all of these macros preserve errno (saving and restoring) */
 
-#define XL_LOG_DEBUG 3
-#define XL_LOG_INFO 2
-#define XL_LOG_WARNING 1
-#define XL_LOG_ERROR 0
-
 /* logging */
 void xl_logv(struct libxl_ctx *ctx, int errnoval, int loglevel, const char *file, int line, const char *func, char *fmt, va_list al);
 void xl_log(struct libxl_ctx *ctx, int errnoval, int loglevel, const char *file, int line, const char *func, char *fmt, ...);
diff --git a/tools/libxl/libxl_utils.h b/tools/libxl/libxl_utils.h
index fe8b975..4c04c46 100644
--- a/tools/libxl/libxl_utils.h
+++ b/tools/libxl/libxl_utils.h
@@ -48,5 +48,16 @@ pid_t libxl_fork(struct libxl_ctx *ctx);
 int libxl_pipe(struct libxl_ctx *ctx, int pipes[2]);
   /* Just like fork(2), pipe(2), but log errors. */
 
+void libxl_report_child_exitstatus(struct libxl_ctx *ctx, int level,
+                                   const char *what, pid_t pid, int status);
+    /* treats all exit statuses as errors; if that's not what you want,
+     * check status yourself first */
+
+/* log levels: */
+#define XL_LOG_DEBUG 3
+#define XL_LOG_INFO 2
+#define XL_LOG_WARNING 1
+#define XL_LOG_ERROR 0
+
 #endif
 
-- 
1.5.6.5