1 /*
2 * Copyright (c) 2017 IBM Corporation
3 *
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
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
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.
15 */
16 #include <stdarg.h>
17 #include <stdio.h>
18
cmd_scanf(const char * cmd,const char * fmt,...)19 int cmd_scanf(const char *cmd, const char *fmt, ...) {
20 va_list args;
21 FILE *pipe;
22
23 va_start(args, fmt);
24 pipe = popen(cmd, "r");
25 if (pipe == NULL) {
26 va_end(args);
27 return -1;
28 }
29
30 vfscanf(pipe, fmt, args);
31 va_end(args);
32 pclose(pipe);
33 return 0;
34 }
35