gpxe/src/core/cpio.c

   1 /*
   2  * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of the
   7  * License, or any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18
  19 FILE_LICENCE ( GPL2_OR_LATER );
  20
  21 /** @file
  22  *
  23  * CPIO archives
  24  *
  25  */
  26
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <gpxe/cpio.h>
  30
  31 /**
  32  * Set field within a CPIO header
  33  *
  34  * @v field             Field within CPIO header
  35  * @v value             Value to set
  36  */
  37 void cpio_set_field ( char *field, unsigned long value ) {
  38         char buf[9];
  39
  40         snprintf ( buf, sizeof ( buf ), "%08lx", value );
  41         memcpy ( field, buf, 8 );
  42 }