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GUnixMount: port unmount to GSubprocess
The existing code is buggy and now that we have GSubprocess, we should just use it instead, allowing for some substantial reduction in complexity. https://bugzilla.gnome.org/show_bug.cgi?id=724916
This commit is contained in:
Ryan Lortie
parent
cee80dc8c4
commit
64ec757d05
158
gio/gunixmount.c
158
gio/gunixmount.c
@ -28,6 +28,8 @@
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#include <unistd.h>
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#include <glib.h>
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#include "gsubprocess.h"
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#include "gioenums.h"
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#include "gunixvolumemonitor.h"
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#include "gunixmount.h"
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#include "gunixmounts.h"
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@ -240,147 +242,55 @@ g_unix_mount_can_eject (GMount *mount)
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return unix_mount->can_eject;
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}
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typedef struct {
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GUnixMount *unix_mount;
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int error_fd;
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GIOChannel *error_channel;
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GSource *error_channel_source;
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GString *error_string;
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gchar **argv;
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} UnmountEjectOp;
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static void
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unmount_eject_op_free (UnmountEjectOp *data)
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{
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if (data->error_channel_source)
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{
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g_source_destroy (data->error_channel_source);
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g_source_unref (data->error_channel_source);
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}
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g_io_channel_unref (data->error_channel);
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g_string_free (data->error_string, TRUE);
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g_strfreev (data->argv);
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close (data->error_fd);
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g_free (data);
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}
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static void
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eject_unmount_cb (GPid pid, gint status, gpointer user_data)
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eject_unmount_done (GObject *source,
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GAsyncResult *result,
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gpointer user_data)
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{
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GSubprocess *subprocess = G_SUBPROCESS (source);
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GTask *task = user_data;
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UnmountEjectOp *data = g_task_get_task_data (task);
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GError *error = NULL;
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gchar *stderr_str;
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if (g_task_return_error_if_cancelled (task))
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return;
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g_spawn_close_pid (pid);
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if (WEXITSTATUS (status) != 0)
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if (!g_subprocess_communicate_utf8_finish (subprocess, result, NULL, &stderr_str, &error))
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{
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g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED,
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"%s", data->error_string->str);
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g_task_return_error (task, error);
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g_error_free (error);
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}
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else /* successful communication */
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{
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if (!g_subprocess_get_successful (subprocess))
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/* ...but bad exit code */
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g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED, "%s", stderr_str);
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else
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/* ...and successful exit code */
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g_task_return_boolean (task, TRUE);
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g_free (stderr_str);
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}
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else
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g_task_return_boolean (task, TRUE);
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g_object_unref (task);
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}
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static gboolean
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eject_unmount_read_error (GIOChannel *channel,
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GIOCondition condition,
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gpointer user_data)
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{
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GTask *task = user_data;
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UnmountEjectOp *data = g_task_get_task_data (task);
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char buf[BUFSIZ];
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gsize bytes_read;
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GError *error;
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GIOStatus status;
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if (g_task_return_error_if_cancelled (task))
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return FALSE;
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error = NULL;
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read:
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status = g_io_channel_read_chars (channel, buf, sizeof (buf), &bytes_read, &error);
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if (status == G_IO_STATUS_NORMAL)
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{
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g_string_append_len (data->error_string, buf, bytes_read);
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if (bytes_read == sizeof (buf))
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goto read;
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}
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else if (status == G_IO_STATUS_EOF)
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g_string_append_len (data->error_string, buf, bytes_read);
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else if (status == G_IO_STATUS_ERROR)
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{
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if (data->error_string->len > 0)
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g_string_append (data->error_string, "\n");
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g_string_append (data->error_string, error->message);
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g_error_free (error);
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if (data->error_channel_source)
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{
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g_source_unref (data->error_channel_source);
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data->error_channel_source = NULL;
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}
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return FALSE;
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}
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return TRUE;
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}
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static gboolean
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eject_unmount_do_cb (gpointer user_data)
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{
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GTask *task = user_data;
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UnmountEjectOp *data = g_task_get_task_data (task);
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GPid child_pid;
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GSource *child_watch;
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GError *error = NULL;
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GSubprocess *subprocess;
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const gchar **argv;
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argv = g_task_get_task_data (task);
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if (g_task_return_error_if_cancelled (task))
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return G_SOURCE_REMOVE;
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if (!g_spawn_async_with_pipes (NULL, /* working dir */
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data->argv,
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NULL, /* envp */
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G_SPAWN_DO_NOT_REAP_CHILD|G_SPAWN_SEARCH_PATH,
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NULL, /* child_setup */
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NULL, /* user_data for child_setup */
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&child_pid,
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NULL, /* standard_input */
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NULL, /* standard_output */
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&(data->error_fd),
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&error)) {
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g_assert (error != NULL);
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goto handle_error;
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}
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subprocess = g_subprocess_newv (argv, G_SUBPROCESS_FLAGS_STDOUT_SILENCE | G_SUBPROCESS_FLAGS_STDERR_PIPE, &error);
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g_assert_no_error (error);
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data->error_string = g_string_new ("");
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data->error_channel = g_io_channel_unix_new (data->error_fd);
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g_io_channel_set_flags (data->error_channel, G_IO_FLAG_NONBLOCK, &error);
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if (error != NULL)
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goto handle_error;
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data->error_channel_source = g_io_create_watch (data->error_channel, G_IO_IN);
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g_task_attach_source (task, data->error_channel_source,
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(GSourceFunc) eject_unmount_read_error);
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child_watch = g_child_watch_source_new (child_pid);
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g_task_attach_source (task, data->error_channel_source,
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(GSourceFunc) eject_unmount_cb);
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g_source_unref (child_watch);
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handle_error:
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if (error != NULL)
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{
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g_task_return_error (task, error);
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g_object_unref (task);
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}
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g_subprocess_communicate_utf8_async (subprocess, NULL,
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g_task_get_cancellable (task),
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eject_unmount_done, task);
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return G_SOURCE_REMOVE;
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}
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@ -393,15 +303,11 @@ eject_unmount_do (GMount *mount,
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char **argv)
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{
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GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
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UnmountEjectOp *data;
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GTask *task;
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GSource *timeout;
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data = g_new0 (UnmountEjectOp, 1);
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data->argv = g_strdupv (argv);
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task = g_task_new (mount, cancellable, callback, user_data);
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g_task_set_task_data (task, data, (GDestroyNotify)unmount_eject_op_free);
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g_task_set_task_data (task, g_strdupv (argv), (GDestroyNotify) g_strfreev);
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if (unix_mount->volume_monitor != NULL)
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g_signal_emit_by_name (unix_mount->volume_monitor, "mount-pre-unmount", mount);
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