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[image] Fail "imgexec"/"boot" if the image to execute is ambiguous

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If there is more than one loaded image, refuse to automatically select
the image to execute.  There are at least two possible cases, with
different "correct" answers:

1. User loads image A by mistake, then loads image B and types "boot".
   User wants to execute image B.

2. User loads image A, then loads image B (which patches image A), then
   types "boot".  User wants to execute image A.

If a user actually wants to load multiple images, they must explicitly
specify which image is to be executed.
This commit is contained in:
Michael Brown 2008-07-08 03:50:44 +01:00
parent 4f2861a376
commit 0436e417bc
2 changed files with 10 additions and 6 deletions
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2
src/hci/commands/image_cmd.c
View File

@ -407,7 +407,7 @@ static int imgexec_exec ( int argc, char **argv ) {
} else {
image = imgautoselect();
if ( ! image ) {
printf ( "No loaded images\n" );
printf ( "No (unique) loaded image\n" );
return 1;
}
}

14
src/usr/imgmgmt.c
View File

@ -86,19 +86,23 @@ int imgexec ( struct image *image ) {
}
/**
* Identify the first loaded image
* Identify the only loaded image
*
* @ret image Image, or NULL
* @ret image Image, or NULL if 0 or >1 images are loaded
*/
struct image * imgautoselect ( void ) {
struct image *image;
struct image *selected_image = NULL;
int flagged_images = 0;
for_each_image ( image ) {
if ( image->flags & IMAGE_LOADED )
return image;
if ( image->flags & IMAGE_LOADED ) {
selected_image = image;
flagged_images++;
}
}
return NULL;
return ( ( flagged_images == 1 ) ? selected_image : NULL );
}
/**