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| | /*
* Copyright (C) 2012-2020 all contributors <cmogstored-public@yhbt.net>
* License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
*/
#include "check.h"
#include "iov_str.h"
static void writev_simple(void)
{
struct iovec iov[1];
int fds[2];
pipe_or_die(fds);
IOV_STR(iov, "HELLO");
{
void *x = mog_trywritev(fds[1], iov, 1);
assert(x == NULL && "couldn't write 5 bytes to pipe");
}
close_pipe(fds);
}
static void write_wrong(void)
{
struct iovec iov[1];
int fds[2];
pipe_or_die(fds);
IOV_STR(iov, "HELLO");
{
int null = open("/dev/null", O_RDONLY);
void *x;
assert(null >= 0 && "invalid FD opening /dev/nulL");
x = mog_trywritev(null, iov, 1);
assert(x == MOG_WR_ERROR && "did not return error");
close(null);
}
if (0) { /* FIXME: this makes valgrind unhappy */
void *x = mog_trysend(fds[0], (void *)1, 3, 0);
assert(x == MOG_WR_ERROR && "bad addr did not return error");
}
close_pipe(fds);
{
void *x = mog_trywritev(fds[1], iov, 1);
assert(x == MOG_WR_ERROR && "did not return error");
}
{
char buf[3] = { 0 };
void *x = mog_trysend(fds[1], buf, 3, 0);
assert(x == MOG_WR_ERROR && "bad FD did not return error");
}
}
static void writev_buffer(void)
{
struct iovec iov[1];
int fds[2];
ssize_t total = 0;
void *x;
struct mog_wbuf *wbuf = NULL;
int nread;
enum mog_write_state state;
pipe_or_die(fds);
IOV_STR(iov, "HELLO");
mog_set_nonblocking(fds[1], true);
for (;;) {
x = mog_trywritev(fds[1], iov, 1);
if (x == NULL) {
total += iov[0].iov_len = 5;
} else if (x == MOG_WR_ERROR) {
assert(0 && "unexpected MOG_WR_ERROR");
} else {
assert(x && "wtf");
wbuf = x;
break;
}
}
assert(wbuf && "wbuf not initialized, how did we break from loop?");
/* pipe is blocked */
{
ioctl(fds[0], FIONREAD, &nread);
assert(nread == total && "nread != total");
}
/* pipe should be busy */
{
state = mog_tryflush(fds[1], &wbuf);
assert(MOG_WRSTATE_BUSY == state && "not busy?");
assert(wbuf && "wbuf got nulled");
}
/* drain some */
{
char * tmp = xmalloc(nread);
ssize_t r = read(fds[0], tmp, nread);
assert(r == nread && "couldn't drain all");
free(tmp);
}
/* flush (succeed) */
{
state = mog_tryflush(fds[1], &wbuf);
assert(MOG_WRSTATE_DONE == state && "didn't finish");
assert(wbuf == NULL && "didn't null");
}
close_pipe(fds);
}
static void trysend_buffer(void)
{
int fds[2];
ssize_t total = 0;
void *x;
struct mog_wbuf *wbuf = NULL;
int nread;
char buf[5] = { 0 };
size_t len = sizeof(buf);
socketpair_or_die(fds);
mog_set_nonblocking(fds[1], true);
for (;;) {
x = mog_trysend(fds[1], buf, len, 0);
if (x == NULL) {
total += len;
} else if (x == MOG_WR_ERROR) {
assert(0 && "unexpected MOG_WR_ERROR");
} else {
assert(x && "wtf");
wbuf = x;
break;
}
}
assert(wbuf && "wbuf not initialized, how did we break from loop?");
free(wbuf); /* for valgrind, we should never actually do this */
/* socket is/was blocked, it should be readable */
{
ioctl(fds[0], FIONREAD, &nread);
assert(nread > 0 && "nread non-zero");
}
/* ignore errors when closing sockets, BSDs can return weird values */
close(fds[1]);
close(fds[0]);
}
static void writev_big(size_t len)
{
struct iovec iov[3];
void *ptrv[3];
int fds[2];
void *x;
int i;
pipe_or_die(fds);
for (i = 0; i < 3; i++) {
ptrv[i] = iov[i].iov_base = xmalloc(len);
iov[i].iov_len = len;
memset(ptrv[i], 'a' + i, len);
}
mog_set_nonblocking(fds[1], true);
x = mog_trywritev(fds[1], iov, 3);
assert(x != MOG_WR_ERROR && x != NULL && "did not buffer on busy");
free(x);
close_pipe(fds);
for (i = 0; i < 3; i++)
free(ptrv[i]);
}
int main(void)
{
writev_simple();
write_wrong();
writev_buffer();
writev_big(166331);
writev_big(65536);
trysend_buffer();
return 0;
}
|