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/* 4.t
- read of descriptor without read permission (4.t)
- write to descriptor without write permission (4.t)
- check that O_APPEND writes actually append
*/
#include "aio_setup.h"
#define SIZE 512
#define READ 'r'
#define WRITE 'w'
int attempt(int fd, void *buf, int count, int rw, int expect)
{
struct iocb iocb;
int res;
switch(rw) {
case READ: io_prep_pread (&iocb, fd, buf, count, 0); break;
case WRITE: io_prep_pwrite(&iocb, fd, buf, count, 0); break;
}
printf("expect %3d: (%c), res = ", expect, rw);
fflush(stdout);
res = sync_submit(&iocb);
printf("%3d [%s]\n", res, (res <= 0) ? strerror(-res) : "Success");
if (res != expect)
return 1;
return 0;
}
int test_main(void)
{
char buf[SIZE];
int rofd, wofd, rwfd;
int status = 0, res;
memset(buf, 0, SIZE);
rofd = open("rofile", O_RDONLY); assert(rofd != -1);
wofd = open("wofile", O_WRONLY); assert(wofd != -1);
rwfd = open("rwfile", O_RDWR); assert(rwfd != -1);
status |= attempt(rofd, buf, SIZE, WRITE, -EBADF);
status |= attempt(wofd, buf, SIZE, READ, -EBADF);
status |= attempt(rwfd, buf, SIZE, WRITE, SIZE);
status |= attempt(rwfd, buf, SIZE, READ, SIZE);
rwfd = open("rwfile", O_RDWR | O_APPEND); assert(rwfd != -1);
res = ftruncate(rwfd, 0); assert(res == 0);
status |= attempt(rwfd, buf, SIZE, READ, 0);
status |= attempt(rwfd, "1234", 4, WRITE, 4);
status |= attempt(rwfd, "5678", 4, WRITE, 4);
memset(buf, 0, SIZE);
status |= attempt(rwfd, buf, SIZE, READ, 8);
printf("read after append: [%s]\n", buf);
assert(memcmp(buf, "12345678", 8) == 0);
return status;
}
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