diff options
Diffstat (limited to 'ShellPkg/Application/Shell/Shell.c')
| -rw-r--r-- | ShellPkg/Application/Shell/Shell.c | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/ShellPkg/Application/Shell/Shell.c b/ShellPkg/Application/Shell/Shell.c index 36063227a2..97b8c8d6fb 100644 --- a/ShellPkg/Application/Shell/Shell.c +++ b/ShellPkg/Application/Shell/Shell.c @@ -1288,13 +1288,40 @@ AddLineToCommandHistory( )
{
BUFFER_LIST *Node;
+ BUFFER_LIST *Walker;
+ UINT16 MaxHistoryCmdCount;
+ UINT16 Count;
+
+ Count = 0;
+ MaxHistoryCmdCount = PcdGet16(PcdShellMaxHistoryCommandCount);
+
+ if (MaxHistoryCmdCount == 0) {
+ return ;
+ }
+
Node = AllocateZeroPool(sizeof(BUFFER_LIST));
ASSERT(Node != NULL);
Node->Buffer = AllocateCopyPool(StrSize(Buffer), Buffer);
ASSERT(Node->Buffer != NULL);
- InsertTailList(&ShellInfoObject.ViewingSettings.CommandHistory.Link, &Node->Link);
+ for ( Walker = (BUFFER_LIST*)GetFirstNode(&ShellInfoObject.ViewingSettings.CommandHistory.Link)
+ ; !IsNull(&ShellInfoObject.ViewingSettings.CommandHistory.Link, &Walker->Link)
+ ; Walker = (BUFFER_LIST*)GetNextNode(&ShellInfoObject.ViewingSettings.CommandHistory.Link, &Walker->Link)
+ ){
+ Count++;
+ }
+ if (Count < MaxHistoryCmdCount){
+ InsertTailList(&ShellInfoObject.ViewingSettings.CommandHistory.Link, &Node->Link);
+ } else {
+ Walker = (BUFFER_LIST*)GetFirstNode(&ShellInfoObject.ViewingSettings.CommandHistory.Link);
+ RemoveEntryList(&Walker->Link);
+ if (Walker->Buffer != NULL) {
+ FreePool(Walker->Buffer);
+ }
+ FreePool(Walker);
+ InsertTailList(&ShellInfoObject.ViewingSettings.CommandHistory.Link, &Node->Link);
+ }
}
/**
|