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/* Copyright (C) 2018 Causal Agent June <june@causal.agency>
*
* 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 <sys/ioctl.h>
#include <sysexits.h>
#include <unistd.h>
int main(int argc, char *argv[]) {
if (argc < 2) errx(EX_USAGE, "missing private id");
const char *path = argv[1];
int local = open(path, O_WRONLY);
if (local < 0) err(EX_NOINPUT, "%s", path);
int remote = STDIN_FILENO;
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_DATAERR, "short read(%d)", remote);
for (;;) {
ftruncate(local, 0);
lseek(local, 0, SEEK_SET);
ssize_t size = write(local, &window, sizeof(window));
if (size < 0) err(EX_IOERR, "write(%d)", local);
char buf[4096];
for (size_t totalSize = 0; totalSize < 1024 * 1024; totalSize += size) {
size = read(remote, buf, sizeof(buf));
if (size < 0) err(EX_IOERR, "read(%d)", remote);
if (!size) return EX_OK;
size = write(local, buf, size);
if (size < 0) err(EX_IOERR, "write(%d)", local);
}
}
}
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