2 * Copyright 2016 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include <folly/portability/Stdio.h>
21 #include <folly/ScopeGuard.h>
22 #include <folly/portability/Unistd.h>
25 int dprintf(int fd, const char* fmt, ...) {
28 SCOPE_EXIT { va_end(args); };
30 int len = vsnprintf(nullptr, 0, fmt, args);
34 char* buf = new char[len + 1];
35 SCOPE_EXIT { delete[] buf; };
36 if (vsnprintf(buf, len + 1, fmt, args) == len && write(fd, buf, len) == len) {
43 int pclose(FILE* f) { return _pclose(f); }
45 FILE* popen(const char* name, const char* mode) { return _popen(name, mode); }
47 void setbuffer(FILE* f, char* buf, size_t size) {
48 setvbuf(f, buf, _IOFBF, size);
51 int vasprintf(char** dest, const char* format, va_list ap) {
52 int len = vsnprintf(nullptr, 0, format, ap);
56 char* buf = *dest = (char*)malloc(len + 1);
57 if (vsnprintf(buf, len + 1, format, ap) == len) {