static int cgdb_resize_term(int fd)
{
int c, result;
if (read(resize_pipe[0], &c, sizeof (int)) < sizeof (int)) {
logger_write_pos(logger, __FILE__, __LINE__, "read from resize pipe");
return -1;
}
/* If there is more input in the pipe, that means another resize has
* been recieved, and we still have not handled this one. So, skip this
* one and only handle the next one.
*/
result = io_data_ready(resize_pipe[0], 0);
if (result == -1) {
logger_write_pos(logger, __FILE__, __LINE__, "io_data_ready");
return -1;
}
if (result)
return 0;
if (if_resize_term() == -1) {
logger_write_pos(logger, __FILE__, __LINE__, "if_resize_term error");
return -1;
}
return 0;
}
int io_getchar(int fd, unsigned int ms, int *key)
{
char c;
int ret;
int flag = 0;
int val;
if (!key)
return -1;
val = io_data_ready(fd, ms);
if (val == -1) {
logger_write_pos(logger, __FILE__, __LINE__, "Errno(%d)\n", errno);
return -1;
}
if (val == 0)
return 0; /* Nothing to read. */
/* Set nonblocking */
flag = fcntl(fd, F_GETFL, 0);
fcntl(fd, F_SETFL, flag | O_NONBLOCK);
read_again:
/* Read a char */
ret = read(fd, &c, 1);
if (ret == -1 && errno == EAGAIN)
c = 0; /* No data available */
else if (ret == -1 && errno == EINTR)
goto read_again;
else if (ret == -1) {
c = 0;
logger_write_pos(logger, __FILE__, __LINE__, "Errno(%d)\n", errno);
} else if (ret == 0) {
c = 0;
ret = -1;
logger_write_pos(logger, __FILE__, __LINE__, "Read returned nothing\n");
}
/* Set to original state */
fcntl(fd, F_SETFL, flag);
if (ret == -1)
return -1;
*key = c;
return 1;
}
int kui_callback(const int fd, const unsigned int ms, const void *obj, int *key)
{
struct kuictx *kctx = (struct kuictx *) obj;
int result;
if (!key)
return -1;
result = kui_cangetkey(kctx);
if (result == -1)
return -1;
if (result == 1) {
*key = kui_getkey(kctx);
if (*key == -1)
return -1;
}
/* If there is no data ready, check the I/O */
if (result == 0) {
result = io_data_ready(kctx->fd, ms);
if (result == -1)
return -1;
if (result == 1) {
*key = kui_getkey(kctx);
if (*key == -1)
return -1;
}
if (result == 0)
return 0;
}
return 1;
}