123 lines
2.5 KiB
C
123 lines
2.5 KiB
C
/**************************************************************************
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* *
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* Copyright (C) 1986, Silicon Graphics, Inc. *
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* *
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* These coded instructions, statements, and computer programs contain *
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* unpublished proprietary information of Silicon Graphics, Inc., and *
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* are protected by Federal copyright law. They may not be disclosed *
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* to third parties or copied or duplicated in any form, in whole or *
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* in part, without the prior written consent of Silicon Graphics, Inc. *
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* *
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**************************************************************************/
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#ident "$Revision: 1.7 $ $Author: sfc $"
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/*
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* Parent maps a zero-length PRIVATE file with AUTOGROW.
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* Stores to the file and msync-s all of user address
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* space and checks that file length remains 0.
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*
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* Process forks and each process stores private data
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* into the address space and checks that its data has
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* not been trashed by the other.
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <sys/signal.h>
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#include <fcntl.h>
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#include <errno.h>
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#define MPSZ 8192
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int pid, ppid;
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caddr_t addr;
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main(agrc, argv)
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char **argv;
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{
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int fd;
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char c;
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register int i, j;
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struct stat statbuf;
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int dosleep = 0;
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char *filename;
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pid = getpid();
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filename = tempnam(NULL, "fkpriv");
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fd = open(filename, O_CREAT|O_RDWR, 0666);
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if (fd < 0) {
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perror("open");
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exit(1);
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}
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addr = mmap(0, MPSZ, PROT_READ|PROT_WRITE,
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MAP_PRIVATE|MAP_AUTOGROW, fd, 0);
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if (addr == (caddr_t)-1L) {
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perror("map");
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unlink(filename);
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exit(1);
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}
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for (i = 0; i < MPSZ; i++)
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*(addr+i) = 0;
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if (msync(addr, MPSZ, 0)) {
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perror("msync");
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exit(1);
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}
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if (fstat(fd, &statbuf)) {
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perror("fstat");
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exit(1);
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}
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if (statbuf.st_size) {
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fprintf(stderr, "Error: temp file %s non-zero!\n", filename);
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exit(1);
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}
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ppid = getpid();
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switch(pid = fork()) {
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case -1:
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perror("fork");
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unlink(filename);
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exit(1);
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/* NOTREACHED */
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case 0:
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pid = getpid();
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dosleep++;
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break;
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}
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unlink(filename);
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c = pid & 0xff;
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for (i = 0; i < MPSZ; i++)
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*(addr+i) = c;
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for (j = 3; j > 0; j--) {
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sleep(1);
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for (i = 0; i < MPSZ; i++) {
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if (*(addr+i) != c) {
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printf("%s: found %c instead of %c!\n",
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argv[0], *(argv+i), c);
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printf(" test FAILED!\n");
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kill(getpid() == ppid ? pid : ppid, SIGKILL);
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exit(1);
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}
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}
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}
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if (dosleep) {
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sleep(3);
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exit(0);
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}
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sleep(2);
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printf("%s: test PASSED!\n", argv[0]);
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}
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