mirror of
https://gitlab.com/apparmor/apparmor.git
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117 lines
2.1 KiB
C
117 lines
2.1 KiB
C
/* $Id: mmap.c 6040 2006-01-11 00:15:48Z tonyj $ */
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/*
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* Copyright (C) 2002-2005 Novell/SUSE
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2 of the
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* License.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.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 <signal.h>
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#include <string.h>
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static int gotsigusr1;
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void handler(int sig)
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{
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++gotsigusr1;
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}
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int main(int argc, char *argv[])
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{
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int fd, rc, pass;
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const char *data="hello world";
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char *mptr;
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char buf[128];
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sigset_t sigset;
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if (argc != 2){
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fprintf(stderr, "usage: %s file\n",
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argv[0]);
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return 1;
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}
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if (signal(SIGUSR1, handler) == SIG_ERR){
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fprintf(stderr, "FAIL: internal error signal failed - %s\n",
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strerror(errno));
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return 1;
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}
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if (sigemptyset(&sigset) == -1) {
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perror ("FAIL: nullifying sigset");
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return 1;
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}
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fd=open(argv[1], O_CREAT|O_EXCL|O_RDWR, S_IWUSR|S_IRUSR);
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if (fd == -1){
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fprintf(stderr, "FAIL: create %s failed - %s\n",
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argv[1],
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strerror(errno));
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return 1;
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}
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if (ftruncate(fd, getpagesize()) == -1){
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fprintf(stderr, "FAIL: ftruncate %s failed - %s\n",
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argv[1],
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strerror(errno));
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}
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mptr=mmap(NULL, getpagesize(), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
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if (mptr == MAP_FAILED){
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fprintf(stderr, "FAIL: mmap failed - %s\n",
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strerror(errno));
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return 1;
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}
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pass=1;
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nextpass:
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(void)memcpy(mptr, data, strlen(data));
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if (msync(mptr, strlen(data), MS_SYNC) == -1){
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fprintf(stderr, "FAIL: msync failed - %s\n",
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strerror(errno));
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return 1;
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}
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(void)lseek(fd, 0, SEEK_SET);
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rc=read(fd, buf, strlen(data));
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if (rc != strlen(data)){
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fprintf(stderr, "FAIL: read failed - %s\n",
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strerror(errno));
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return 1;
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}
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if (memcmp(buf, mptr, strlen(data)) != 0){
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fprintf(stderr, "FAIL: read comparison failed\n");
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}
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gotsigusr1=0;
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if (pass == 1){
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while (!gotsigusr1){
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(void)sigsuspend(&sigset);
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}
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pass++;
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goto nextpass;
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}
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printf("PASS\n");
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return 0;
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}
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