guestfs(3): Document that old callback functions still work.

[libguestfs.git] / src / guestfs.pod

diff --git a/src/guestfs.pod b/src/guestfs.pod
index 4e216f1..e546029 100644 (file)
--- a/src/guestfs.pod
+++ b/src/guestfs.pod
@@ -354,7 +354,7 @@ doing:
 
  guestfs_download (g, filename, "/dev/stdout");
 
 
  guestfs_download (g, filename, "/dev/stdout");
 

-and you can write tar output to a pipe C<fd> by doing:
+and you can write tar output to a file descriptor C<fd> by doing:

 
  char devfd[64];
  snprintf (devfd, sizeof devfd, "/dev/fd/%d", fd);
 
  char devfd[64];
  snprintf (devfd, sizeof devfd, "/dev/fd/%d", fd);


@@ -775,6 +775,9 @@ them.
 
 =item Autosync / forgetting to sync.
 
 
 =item Autosync / forgetting to sync.
 

+I<Update:> Autosync is enabled by default for all API users starting
+from libguestfs 1.5.24.  This section only applies to older versions.
+

 When modifying a filesystem from C or another language, you B<must>
 unmount all filesystems and call L</guestfs_sync> explicitly before
 you close the libguestfs handle.  You can also call:
 When modifying a filesystem from C or another language, you B<must>
 unmount all filesystems and call L</guestfs_sync> explicitly before
 you close the libguestfs handle.  You can also call:


@@ -793,9 +796,6 @@ Note that in L<guestfish(3)> autosync is the default.  So quick and
 dirty guestfish scripts that forget to sync will work just fine, which
 can make this very puzzling if you are trying to debug a problem.
 
 dirty guestfish scripts that forget to sync will work just fine, which
 can make this very puzzling if you are trying to debug a problem.
 

-Update: Autosync is enabled by default for all API users starting from
-libguestfs 1.5.24.
-

 =item Mount option C<-o sync> should not be the default.
 
 If you use L</guestfs_mount>, then C<-o sync,noatime> are added
 =item Mount option C<-o sync> should not be the default.
 
 If you use L</guestfs_mount>, then C<-o sync,noatime> are added


@@ -1285,7 +1285,7 @@ Create a handle by calling L</guestfs_create>.  Call L</guestfs_close>
 to free the handle and release all resources used.
 
 For information on using multiple handles and threads, see the section
 to free the handle and release all resources used.
 
 For information on using multiple handles and threads, see the section

-L</MULTIPLE HANDLES AND MULTIPLE THREADS> below.
+L</MULTIPLE HANDLES AND MULTIPLE THREADS> above.

 
 =head2 guestfs_create
 
 
 =head2 guestfs_create
 


@@ -1293,15 +1293,16 @@ L</MULTIPLE HANDLES AND MULTIPLE THREADS> below.
 
 Create a connection handle.
 
 
 Create a connection handle.
 

-You have to call L</guestfs_add_drive_opts> (or one of the equivalent
-calls) on the handle at least once.
+On success this returns a non-NULL pointer to a handle.  On error it
+returns NULL.

 
 

-This function returns a non-NULL pointer to a handle on success or
-NULL on error.
+You have to "configure" the handle after creating it.  This includes
+calling L</guestfs_add_drive_opts> (or one of the equivalent calls) on
+the handle at least once.

 
 After configuring the handle, you have to call L</guestfs_launch>.
 
 
 After configuring the handle, you have to call L</guestfs_launch>.
 

-You may also want to configure error handling for the handle.  See
+You may also want to configure error handling for the handle.  See the

 L</ERROR HANDLING> section below.
 
 =head2 guestfs_close
 L</ERROR HANDLING> section below.
 
 =head2 guestfs_close


@@ -1310,6 +1311,12 @@ L</ERROR HANDLING> section below.
 
 This closes the connection handle and frees up all resources used.
 
 
 This closes the connection handle and frees up all resources used.
 

+If autosync was set on the handle and the handle was launched, then
+this implicitly calls various functions to unmount filesystems and
+sync the disk.  See L</guestfs_set_autosync> for more details.
+
+If a close callback was set on the handle, then it is called.
+

 =head1 ERROR HANDLING
 
 API functions can return errors.  For example, almost all functions
 =head1 ERROR HANDLING
 
 API functions can return errors.  For example, almost all functions


@@ -1665,7 +1672,8 @@ old functions C<guestfs_set_log_message_callback>,
 C<guestfs_set_subprocess_quit_callback>,
 C<guestfs_set_launch_done_callback>, C<guestfs_set_close_callback> and
 C<guestfs_set_progress_callback> are no longer documented in this
 C<guestfs_set_subprocess_quit_callback>,
 C<guestfs_set_launch_done_callback>, C<guestfs_set_close_callback> and
 C<guestfs_set_progress_callback> are no longer documented in this

-manual page.
+manual page.  Because of the ABI guarantee, the old functions continue
+to work.

 
 Handles generate events when certain things happen, such as log
 messages being generated, progress messages during long-running
 
 Handles generate events when certain things happen, such as log
 messages being generated, progress messages during long-running