67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
/*
|
|
* This file is part of Jehanne.
|
|
*
|
|
* Copyright (C) 2016 Giacomo Tesio <giacomo@tesio.it>
|
|
*
|
|
* Jehanne is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, version 2 of the License.
|
|
*
|
|
* Jehanne is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with Jehanne. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include <u.h>
|
|
#include <lib9.h>
|
|
|
|
int spin;
|
|
int ok[2];
|
|
void
|
|
main(void)
|
|
{
|
|
char **test;
|
|
test = (char **)privalloc();
|
|
*test = smprint("Hello from %d (at %p)\n", getpid(), test);
|
|
|
|
rfork(RFNOTEG);
|
|
switch(rfork(RFPROC|RFMEM)){
|
|
case -1:
|
|
exits("rfork");
|
|
case 0:
|
|
*test = smprint("Hello from %d (at %p)\n", getpid(), test);
|
|
spin = 1;
|
|
while(spin)
|
|
;
|
|
print("on %d: %s", getpid(), *test);
|
|
exits(nil);
|
|
break;
|
|
default:
|
|
while(spin == 0)
|
|
;
|
|
}
|
|
switch(rfork(RFPROC|RFMEM)){
|
|
case -1:
|
|
exits("rfork");
|
|
case 0:
|
|
*test = smprint("Hello from %d (at %p)\n", getpid(), test);
|
|
spin = 2;
|
|
while(spin)
|
|
;
|
|
print("on %d: %s", getpid(), *test);
|
|
exits(nil);
|
|
break;
|
|
default:
|
|
while(spin == 1)
|
|
;
|
|
}
|
|
|
|
spin = 0;
|
|
sleep(500);
|
|
print("on %d: %s", getpid(), *test);
|
|
exits("PASS");
|
|
}
|