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[image] Add "--autofree" option

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Allow images to be automatically freed after execution completes
(successfully or otherwise).

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2012-07-20 10:37:24 +01:00
parent 23b70323c7
commit d3c660b671
4 changed files with 38 additions and 14 deletions
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32
src/core/image.c
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@@ -194,6 +194,10 @@ int register_image ( struct image *image ) {
*/
void unregister_image ( struct image *image ) {
/* Do nothing unless image is registered */
if ( ! ( image->flags & IMAGE_REGISTERED ) )
return;
DBGC ( image, "IMAGE %s unregistered\n", image->name );
list_del ( &image->list );
image->flags &= ~IMAGE_REGISTERED;
@@ -259,23 +263,13 @@ int image_probe ( struct image *image ) {
*/
int image_exec ( struct image *image ) {
struct image *saved_current_image;
struct image *replacement;
struct image *replacement = NULL;
struct uri *old_cwuri;
int rc;
/* Sanity check */
assert ( image->flags & IMAGE_REGISTERED );
/* Check that this image can be selected for execution */
if ( ( rc = image_select ( image ) ) != 0 )
return rc;
/* Check that image is trusted (if applicable) */
if ( require_trusted_images && ! ( image->flags & IMAGE_TRUSTED ) ) {
DBGC ( image, "IMAGE %s is not trusted\n", image->name );
return -EACCES_UNTRUSTED;
}
/* Switch current working directory to be that of the image itself */
old_cwuri = uri_get ( cwuri );
churi ( image->uri );
@@ -289,6 +283,17 @@ int image_exec ( struct image *image ) {
*/
current_image = image_get ( image );
/* Check that this image can be selected for execution */
if ( ( rc = image_select ( image ) ) != 0 )
goto err;
/* Check that image is trusted (if applicable) */
if ( require_trusted_images && ! ( image->flags & IMAGE_TRUSTED ) ) {
DBGC ( image, "IMAGE %s is not trusted\n", image->name );
rc = -EACCES_UNTRUSTED;
goto err;
}
/* Record boot attempt */
syslog ( LOG_NOTICE, "Executing \"%s\"\n", image->name );
@@ -317,6 +322,11 @@ int image_exec ( struct image *image ) {
if ( replacement )
assert ( replacement->flags & IMAGE_REGISTERED );
err:
/* Unregister image if applicable */
if ( image->flags & IMAGE_AUTO_UNREGISTER )
unregister_image ( image );
/* Drop temporary reference to the original image */
image_put ( image );