/* 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, long long pos, int rw, int expect) { struct iocb iocb; int res; switch(rw) { case READ: io_prep_pread (&iocb, fd, buf, count, pos); break; case WRITE: io_prep_pwrite(&iocb, fd, buf, count, pos); break; } printf("expect %3d: (%c), res = ", expect, rw); fflush(stdout); res = sync_submit(&iocb); printf("%3d [%s]%s\n", res, (res <= 0) ? strerror(-res) : "Success", (res != expect) ? " -- FAILED" : ""); 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("testdir/rofile", O_RDONLY); assert(rofd != -1); wofd = open("testdir/wofile", O_WRONLY); assert(wofd != -1); rwfd = open("testdir/rwfile", O_RDWR); assert(rwfd != -1); status |= attempt(rofd, buf, SIZE, 0, WRITE, -EBADF); status |= attempt(wofd, buf, SIZE, 0, READ, -EBADF); status |= attempt(rwfd, buf, SIZE, 0, WRITE, SIZE); status |= attempt(rwfd, buf, SIZE, 0, READ, SIZE); status |= attempt(rwfd, buf, SIZE, -1, READ, -EINVAL); status |= attempt(rwfd, buf, SIZE, -1, WRITE, -EINVAL); rwfd = open("testdir/rwfile", O_RDWR|O_APPEND); assert(rwfd != -1); res = ftruncate(rwfd, 0); assert(res == 0); status |= attempt(rwfd, buf, SIZE, 0, READ, 0); status |= attempt(rwfd, "1234", 4, 0, WRITE, 4); status |= attempt(rwfd, "5678", 4, 0, WRITE, 4); memset(buf, 0, SIZE); status |= attempt(rwfd, buf, SIZE, 0, READ, 8); printf("read after append: [%s]\n", buf); assert(memcmp(buf, "12345678", 8) == 0); status |= attempt(rwfd, KERNEL_RW_POINTER, SIZE, 0, READ, -EFAULT); status |= attempt(rwfd, KERNEL_RW_POINTER, SIZE, 0, WRITE, -EFAULT); /* Some architectures map the 0 page. Ugh. */ #if !defined(__ia64__) status |= attempt(rwfd, NULL, SIZE, 0, WRITE, -EFAULT); #endif return status; }