Commit 747c3c2b authored by Chad MILLER's avatar Chad MILLER
Browse files

Bug#30394: Empty HOME environment variable causes several utilities to crash 

Tilde expansion could fail when it was to expand to an empty string (such as
when HOME is set to an empty string), especially on systems where size_t is
unsigned.
parent 29410248

mysys/mf_pack.c

+1 −1
Original line number Diff line number Diff line
@@ -343,7 +343,7 @@ uint unpack_dirname(my_string to, const char *from) 
      length-=(uint) (suffix-buff)-1;

      if (length+(h_length= (uint) strlen(tilde_expansion)) <= FN_REFLEN)

      {

	if (tilde_expansion[h_length-1] == FN_LIBCHAR)

	if ((h_length > 0) && (tilde_expansion[h_length-1] == FN_LIBCHAR))

	  h_length--;

	if (buff+h_length < suffix)

	  bmove(buff+h_length,suffix,length);