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/* Copyright 2021 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "test_util.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "util.h"
#define MAX_PIPE_CAPACITY (4096)
FILE *write_to_pipe(const std::string& content)
{
int pipefd[2];
if (pipe(pipefd) == -1) {
die("pipe(pipefd) failed");
}
size_t len = content.length();
if (len > MAX_PIPE_CAPACITY)
die("write_to_pipe cannot handle >4KB content.");
size_t i = 0;
unsigned int attempts = 0;
ssize_t ret;
while (i < len) {
ret = write(pipefd[1], content.c_str() + i, len - i);
if (ret == -1) {
close(pipefd[0]);
close(pipefd[1]);
return NULL;
}
/* If we write 0 bytes three times in a row, fail. */
if (ret == 0) {
if (++attempts >= 3) {
close(pipefd[0]);
close(pipefd[1]);
warn("write() returned 0 three times in a row");
return NULL;
}
continue;
}
attempts = 0;
i += (size_t)ret;
}
close(pipefd[1]);
return fdopen(pipefd[0], "r");
}
std::string source_path(const std::string& file) {
std::string srcdir = getenv("SRC") ? : ".";
return srcdir + "/" + file;
}
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