kaguya
54 lines
943 B
C
54 lines
943 B
C
#include <assert.h>
|
|
#include <fcntl.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <sys/uio.h>
|
|
|
|
#ifdef USE_HOST_LIBC
|
|
#define TEST_FILE "readv-writev-host-libc.tmp"
|
|
#else
|
|
#define TEST_FILE "readv-writev.tmp"
|
|
#endif
|
|
|
|
int main() {
|
|
// Make sure that it wasn't created by a previous test run
|
|
unlink(TEST_FILE);
|
|
|
|
int fd = open(TEST_FILE, O_RDWR | O_CREAT, 0644);
|
|
assert(fd != -1);
|
|
|
|
char str0[] = "hello ";
|
|
char str1[] = "world!";
|
|
|
|
struct iovec bufs[2] = {
|
|
{
|
|
.iov_base = &str0,
|
|
.iov_len = strlen(str0),
|
|
},
|
|
{
|
|
.iov_base = &str1,
|
|
.iov_len = strlen(str1),
|
|
},
|
|
};
|
|
|
|
ssize_t written = writev(fd, bufs, 2);
|
|
assert(written == 12);
|
|
|
|
memset(&str0, 0, strlen(str0));
|
|
memset(&str1, 0, strlen(str1));
|
|
|
|
assert(!lseek(fd, 0, SEEK_SET));
|
|
|
|
ssize_t read = readv(fd, bufs, 2);
|
|
assert(read == 12);
|
|
|
|
assert(!strncmp(str0, "hello ", 7));
|
|
assert(!strncmp(str1, "world!", 7));
|
|
|
|
assert(!close(fd));
|
|
|
|
unlink(TEST_FILE);
|
|
|
|
return 0;
|
|
}
|