libc/stdio/rename.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2009  Tomas 'ZeXx86' Jedrzejek (zexx86@gmail.com)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #include <errno.h>
  21
  22 int rename (const char *oldpath, const char *newpath)
  23 {
  24         int *ret = (int *) 0;
  25
  26         asm volatile (
  27                 "movl $63, %%eax;"
  28                 "movl %1, %%ebx;"
  29                 "movl %2, %%ecx;"
  30                 "int $0x80;"
  31                 "movl %%eax, %0;" : "=g" (ret) : "b" (oldpath), "g" (newpath) : "%eax", "memory");
  32
  33         errno_update ();
  34
  35         return (int) *ret;
  36 }