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/*
*
* Copyright 2015 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <grpc/support/port_platform.h>
#ifdef GPR_POSIX_TMPFILE
#include "src/core/lib/gpr/tmpfile.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#include "src/core/lib/gpr/string.h"
FILE* gpr_tmpfile(const char* prefix, char** tmp_filename) {
FILE* result = nullptr;
char* filename_template;
int fd;
if (tmp_filename != nullptr) *tmp_filename = nullptr;
gpr_asprintf(&filename_template, "/tmp/%s_XXXXXX", prefix);
GPR_ASSERT(filename_template != nullptr);
fd = mkstemp(filename_template);
if (fd == -1) {
gpr_log(GPR_ERROR, "mkstemp failed for filename_template %s with error %s.",
filename_template, strerror(errno));
goto end;
}
result = fdopen(fd, "w+");
if (result == nullptr) {
gpr_log(GPR_ERROR, "Could not open file %s from fd %d (error = %s).",
filename_template, fd, strerror(errno));
unlink(filename_template);
close(fd);
goto end;
}
end:
if (result != nullptr && tmp_filename != nullptr) {
*tmp_filename = filename_template;
} else {
gpr_free(filename_template);
}
return result;
}
#endif /* GPR_POSIX_TMPFILE */
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