kernel/tests/test2.c

0001 /*                    The Quest Operating System
0002  *  Copyright (C) 2005-2010  Richard West, Boston University
0003  *
0004  *  This program is free software: you can redistribute it and/or modify
0005  *  it under the terms of the GNU General Public License as published by
0006  *  the Free Software Foundation, either version 3 of the License, or
0007  *  (at your option) any later version.
0008  *
0009  *  This program is distributed in the hope that it will be useful,
0010  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
0011  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
0012  *  GNU General Public License for more details.
0013  *
0014  *  You should have received a copy of the GNU General Public License
0015  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
0016  */
0017
0018 #include "syscall.h"
0019
0020 void
0021 putx (unsigned long l)
0022 {
0023
0024   int i, li;
0025
0026   for (i = 7; i >= 0; i--)
0027     if ((li = (l >> (i << 2)) & 0x0F) > 9)
0028       putchar ('A' + li - 0x0A);
0029     else
0030       putchar ('0' + li);
0031 }
0032
0033 void
0034 print (char *s)
0035 {
0036   while (*s) {
0037     putchar (*s++);
0038   }
0039 }
0040
0041 void
0042 _start ()
0043 {
0044   int pid;
0045   int var = 0;
0046
0047   if ((pid = fork ())) {
0048     waitpid (pid);
0049     print ("parent (");
0050     putx (var);
0051     print (")\n");
0052     _exit (0);
0053   } else {
0054     print ("child          \n");
0055     var = 1;
0056     _exit (0);
0057   }
0058 }
0059
0060 /*
0061  * Local Variables:
0062  * indent-tabs-mode: nil
0063  * mode: C
0064  * c-file-style: "gnu"
0065  * c-basic-offset: 2
0066  * End:
0067  */
0068
0069 /* vi: set et sw=2 sts=2: */