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#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "include/ceph_assert.h"
#define REGION 1048576
int main(int argc, char *argv[]) {
pid_t p = fork();
char buf[REGION];
memset(buf, 0, sizeof(buf));
if (p != 0) {
int done = 0;
int fd = open(argv[1], O_RDWR|O_CREAT, 0644);
if (fd < 0) {
perror(argv[1]);
return 1;
}
int i = 0;
while(!done) {
printf("writing %d\n", i++);
ceph_assert(pwrite(fd, buf, REGION, 0) == REGION);
int status;
int ret = waitpid(p, &status, WNOHANG);
ceph_assert(ret >= 0);
if (ret > 0) {
done = 1;
}
}
close(fd);
} else {
sleep(1);
int fd = open(argv[2], O_RDONLY, 0644);
if (fd < 0) {
perror(argv[2]);
return 1;
}
printf("reading\n");
ceph_assert(pread(fd, buf, REGION, 0) == REGION);
close(fd);
}
return 0;
}
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