60 lines
1.1 KiB
C++
60 lines
1.1 KiB
C++
/*
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* \brief Standalone POSIX pipe
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* \author Emery Hemingway
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* \date 2018-03-06
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*/
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/*
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* Copyright (C) 2018 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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/* Genode includes */
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#include <base/log.h>
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/* Libc includes */
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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int main()
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{
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enum { SIXTEEN_K = 1 << 14 };
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static char buf[SIXTEEN_K];
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Genode::uint64_t total = 0;
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while (true) {
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auto const nr = fread(buf, 1, sizeof(buf), stdin);
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if (nr == 0 && feof(stdin))
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break;
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if (nr < 1 || nr > sizeof(buf)) {
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int res = errno;
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Genode::error((char const *)strerror(res));
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return res;
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}
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auto remain = nr;
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auto off = 0;
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while (remain > 0) {
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auto const nw = fwrite(buf+off, 1, remain, stdout);
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if (nw < 1 || nw > remain) {
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int res = errno;
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Genode::error((char const *)strerror(res));
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return res;
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}
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remain -= nw;
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off += nw;
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total += nw;
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}
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}
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Genode::log("piped ", total, " bytes");
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return 0;
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};
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