[libgsystem] GSSubprocess: Add new helper API to synchronously spawn

[Colin Walters <walters src gnome org>]

commit b11ad335f459e3c61b317308da57de441660efd0
Author: Colin Walters <walters verbum org>
Date:   Fri Dec 21 11:51:15 2012 -0500

    GSSubprocess: Add new helper API to synchronously spawn
    
    This ends up being used a lot in ostree.

 gsystem-subprocess.c |   45 +++++++++++++++++++++++++++++++++++++++++++++
 gsystem-subprocess.h |    7 +++++++
 2 files changed, 52 insertions(+), 0 deletions(-)
---
diff --git a/gsystem-subprocess.c b/gsystem-subprocess.c
index b1980c0..383e921 100644
--- a/gsystem-subprocess.c
+++ b/gsystem-subprocess.c
@@ -891,3 +891,48 @@ gs_subprocess_new_simple_argv (gchar                       **argv,
 
   return result;
 }
+
+/**
+ * gs_subprocess_simple_run_sync:
+ * @cwd: Current working directory
+ * @stdin_disposition: What to do with standard input
+ * @cancellable: a #GCancellable
+ * @error: a #GError
+ * @first_arg: First argument
+ * @...: Remaining arguments, %NULL terminated
+ *
+ * Run a process synchronously, throw an error if it fails.
+ */
+gboolean
+gs_subprocess_simple_run_sync (const char                    *cwd,
+                               GSSubprocessStreamDisposition  stdin_disposition,
+                               GCancellable                  *cancellable,
+                               GError                       **error,
+                               const char                    *first_arg,
+                               ...)
+{
+  gboolean ret = FALSE;
+  va_list args;
+  GSSubprocess *proc = NULL;
+  GSSubprocessContext *context = NULL;
+
+  va_start (args, first_arg);
+  context = gs_subprocess_context_newa (first_arg, args);
+  va_end (args);
+  gs_subprocess_context_set_stdin_disposition (context, stdin_disposition);
+  gs_subprocess_context_set_cwd (context, cwd);
+  proc = gs_subprocess_new (context, cancellable, error);
+  if (!proc)
+    goto out;
+
+  if (!gs_subprocess_wait_sync_check (proc, cancellable, error))
+    goto out;
+
+  ret = TRUE;
+ out:
+  if (context)
+    g_object_unref (context);
+  if (proc)
+    g_object_unref (proc);
+  return ret;
+}
diff --git a/gsystem-subprocess.h b/gsystem-subprocess.h
index 7ca6417..cc66978 100644
--- a/gsystem-subprocess.h
+++ b/gsystem-subprocess.h
@@ -84,6 +84,13 @@ GSSubprocess *    gs_subprocess_new_simple_argv (char                         **
                                                  GCancellable                  *cancellable,
                                                  GError                       **error);
 
+gboolean          gs_subprocess_simple_run_sync (const char                    *cwd,
+                                                 GSSubprocessStreamDisposition  stdin_disposition,
+                                                 GCancellable                  *cancellable,
+                                                 GError                       **error,
+                                                 const char                    *first_arg,
+                                                 ...) G_GNUC_NULL_TERMINATED;
+
 G_END_DECLS
 
 #endif