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/* Copyright (c) 2018, Curtis McEnroe <programble@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sysexits.h>
#include <unistd.h>
int main(int argc, char *argv[]) {
if (argc < 2) return EX_USAGE;
const char *path = argv[1];
int remote = STDIN_FILENO;
int stream = open(path, O_WRONLY);
if (stream < 0) err(EX_NOINPUT, "%s", path);
struct winsize window;
ssize_t size = read(remote, &window, sizeof(window));
if (size < 0) err(EX_IOERR, "read(%d)", remote);
if ((size_t)size < sizeof(window)) errx(EX_IOERR, "short read(%d)", remote);
for (;;) {
int error = ftruncate(stream, 0);
if (error) err(EX_IOERR, "%s", path);
off_t offset = lseek(stream, 0, SEEK_SET);
if (offset < 0) err(EX_IOERR, "%s", path);
ssize_t size = write(stream, &window, sizeof(window));
if (size < 0) err(EX_IOERR, "write(%d)", stream);
if ((size_t)size < sizeof(window)) errx(EX_IOERR, "short write(%d)", stream);
char buf[4096];
ssize_t totalSize = 0;
while (totalSize < 1024 * 1024) {
ssize_t readSize = read(remote, buf, sizeof(buf));
if (readSize < 0) err(EX_IOERR, "read(%d)", remote);
if (!readSize) return EX_OK;
ssize_t writeSize = write(stream, buf, readSize);
if (writeSize < 0) err(EX_IOERR, "write(%d)", stream);
if (writeSize < readSize) errx(EX_IOERR, "short write(%d)", stream);
totalSize += readSize;
}
}
}
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