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ShellPkg: Refine code to use Strn**S safe functions instead of Str**S ones in some cases.

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Safe string functions may ASSERT when the source length is larger than the MaxDest. This patch use Strn**S to indicate the copy length. 

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Qiu Shumin <shumin.qiu@intel.com>
Reviewed-by: Tapan Shah <<tapandshah@hp.com>>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17894 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Qiu Shumin
2015-07-09 03:19:06 +00:00
committed by shenshushi
parent 3b87e3881e
commit 4dc0d578b8
5 changed files with 44 additions and 39 deletions
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4
ShellPkg/Application/Shell/FileHandleWrappers.c
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@@ -509,7 +509,7 @@ FileInterfaceStdInRead(
if (StrStr(CurrentString + TabPos, L":") == NULL) {
Cwd = ShellInfoObject.NewEfiShellProtocol->GetCurDir(NULL);
if (Cwd != NULL) {
StrCpyS(TabStr, (*BufferSize)/sizeof(CHAR16), Cwd);
StrnCpyS(TabStr, (*BufferSize)/sizeof(CHAR16), Cwd, (*BufferSize)/sizeof(CHAR16) - 1);
if (TabStr[StrLen(TabStr)-1] == L'\\' && *(CurrentString + TabPos) == L'\\' ) {
TabStr[StrLen(TabStr)-1] = CHAR_NULL;
}
@@ -523,7 +523,7 @@ FileInterfaceStdInRead(
StrnCatS(TabStr, (*BufferSize)/sizeof(CHAR16), CurrentString + TabPos, StringLen - TabPos);
}
} else {
StrCpyS(TabStr, (*BufferSize)/sizeof(CHAR16), CurrentString + TabPos);
StrnCpyS(TabStr, (*BufferSize)/sizeof(CHAR16), CurrentString + TabPos, (*BufferSize)/sizeof(CHAR16) - 1);
}
StrnCatS(TabStr, (*BufferSize)/sizeof(CHAR16), L"*", (*BufferSize)/sizeof(CHAR16) - 1 - StrLen(TabStr));
FoundFileList = NULL;