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#include "kernel/types.h"
#include "kernel/stat.h"
#include "user/user.h"
#include "kernel/fcntl.h"
#include "kernel/fs.h"
int
main()
{
char buf[BSIZE];
int fd, i, blocks;
fd = open("big.file", O_CREATE | O_WRONLY);
if(fd < 0){
printf("bigfile: cannot open big.file for writing\n");
exit(-1);
}
blocks = 0;
while(1){
*(int*)buf = blocks;
int cc = write(fd, buf, sizeof(buf));
if(cc <= 0)
break;
blocks++;
if (blocks % 100 == 0)
printf(".");
}
printf("\nwrote %d blocks\n", blocks);
if(blocks != 65803) {
printf("bigfile: file is too small\n");
exit(-1);
}
close(fd);
fd = open("big.file", O_RDONLY);
if(fd < 0){
printf("bigfile: cannot re-open big.file for reading\n");
exit(-1);
}
for(i = 0; i < blocks; i++){
int cc = read(fd, buf, sizeof(buf));
if(cc <= 0){
printf("bigfile: read error at block %d\n", i);
exit(-1);
}
if(*(int*)buf != i){
printf("bigfile: read the wrong data (%d) for block %d\n",
*(int*)buf, i);
exit(-1);
}
}
printf("bigfile done; ok\n");
exit(0);
}
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