descriptor into non-blocking mode temporarily, and correctly handle returns
of EAGAIN from write(). This should fix unix-plink-stdout-nonblock, while
avoiding EAGAIN turning up where we aren't expecting it.
git-svn-id: svn://svn.tartarus.org/sgt/putty@7748
cda61777-01e9-0310-a592-
d414129be87e
bufchain *chain = (is_stderr ? &stderr_data : &stdout_data);
int fd = (is_stderr ? STDERR_FILENO : STDOUT_FILENO);
void *senddata;
bufchain *chain = (is_stderr ? &stderr_data : &stdout_data);
int fd = (is_stderr ? STDERR_FILENO : STDOUT_FILENO);
void *senddata;
if (bufchain_size(chain) == 0)
return;
bufchain_prefix(chain, &senddata, &sendlen);
if (bufchain_size(chain) == 0)
return;
bufchain_prefix(chain, &senddata, &sendlen);
+ fl = fcntl(fd, F_GETFL);
+ if (fl != -1 && !(fl & O_NONBLOCK))
+ fcntl(fd, F_SETFL, fl | O_NONBLOCK);
ret = write(fd, senddata, sendlen);
ret = write(fd, senddata, sendlen);
+ if (fl != -1 && !(fl & O_NONBLOCK))
+ fcntl(fd, F_SETFL, fl);
if (ret > 0)
bufchain_consume(chain, ret);
if (ret > 0)
bufchain_consume(chain, ret);
+ else if (ret < 0 && errno != EAGAIN) {
perror(is_stderr ? "stderr: write" : "stdout: write");
exit(1);
}
perror(is_stderr ? "stderr: write" : "stdout: write");
exit(1);
}