src/usr/imgmgmt.c

   1 /*
   2  * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of the
   7  * License, or any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18
  19 #include <stdint.h>
  20 #include <stdlib.h>
  21 #include <stdio.h>
  22 #include <errno.h>
  23 #include <gpxe/image.h>
  24 #include <gpxe/downloader.h>
  25 #include <gpxe/monojob.h>
  26 #include <gpxe/open.h>
  27 #include <gpxe/uri.h>
  28 #include <usr/imgmgmt.h>
  29
  30 /** @file
  31  *
  32  * Image management
  33  *
  34  */
  35
  36 /**
  37  * Fetch an image
  38  *
  39  * @v uri_string        URI as a string (e.g. "http://www.nowhere.com/vmlinuz")
  40  * @v name              Name for image, or NULL
  41  * @v register_image    Image registration routine
  42  * @ret rc              Return status code
  43  */
  44 int imgfetch ( struct image *image, const char *uri_string,
  45                int ( * image_register ) ( struct image *image ) ) {
  46         struct uri *uri;
  47         int rc;
  48
  49         if ( ! ( uri = parse_uri ( uri_string ) ) )
  50                 return -ENOMEM;
  51
  52         image_set_uri ( image, uri );
  53
  54         if ( ( rc = create_downloader ( &monojob, image, image_register,
  55                                         LOCATION_URI, uri ) ) == 0 )
  56                 rc = monojob_wait ( uri_string );
  57
  58         uri_put ( uri );
  59         return rc;
  60 }
  61
  62 /**
  63  * Load an image
  64  *
  65  * @v image             Image
  66  * @ret rc              Return status code
  67  */
  68 int imgload ( struct image *image ) {
  69         int rc;
  70
  71         /* Try to load image */
  72         if ( ( rc = image_autoload ( image ) ) != 0 )
  73                 return rc;
  74
  75         return 0;
  76 }
  77
  78 /**
  79  * Execute an image
  80  *
  81  * @v image             Image
  82  * @ret rc              Return status code
  83  */
  84 int imgexec ( struct image *image ) {
  85         return image_exec ( image );
  86 }
  87
  88 /**
  89  * Identify the first loaded image
  90  *
  91  * @ret image           Image, or NULL
  92  */
  93 struct image * imgautoselect ( void ) {
  94         struct image *image;
  95
  96         for_each_image ( image ) {
  97                 if ( image->flags & IMAGE_LOADED )
  98                         return image;
  99         }
 100
 101         return NULL;
 102 }
 103
 104 /**
 105  * Display status of an image
 106  *
 107  * @v image             Executable/loadable image
 108  */
 109 void imgstat ( struct image *image ) {
 110         printf ( "%s: %zd bytes", image->name, image->len );
 111         if ( image->type )
 112                 printf ( " [%s]", image->type->name );
 113         if ( image->flags & IMAGE_LOADED )
 114                 printf ( " [LOADED]" );
 115         if ( image->cmdline )
 116                 printf ( " \"%s\"", image->cmdline );
 117         printf ( "\n" );
 118 }
 119
 120 /**
 121  * Free an image
 122  *
 123  * @v image             Executable/loadable image
 124  */
 125 void imgfree ( struct image *image ) {
 126         unregister_image ( image );
 127 }