1//
2// Copyright (C) 2012 The Android Open Source Project
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
17// This is a simple program used to test interaction with update_engine when
18// executing other programs. This program receives pre-programmed actions in the
19// command line and executes them in order.
20
21#include <errno.h>
22#include <stdlib.h>
23#include <sys/stat.h>
24#include <sys/types.h>
25#include <unistd.h>
26
27#include <string>
28
29#define EX_USAGE_ERROR 100
30
31void usage(const char* program, const char* error) {
32  if (error)
33    fprintf(stderr, "ERROR: %s\n", error);
34  fprintf(stderr, "Usage: %s <cmd> [args..]\n", program);
35  exit(EX_USAGE_ERROR);
36}
37
38int main(int argc, char** argv, char** envp) {
39  if (argc < 2)
40    usage(argv[0], "No command passed");
41
42  std::string cmd(argv[1]);
43  if (cmd == "fstat") {
44    // Call fstat on the passed file descriptor number
45    if (argc < 3)
46      usage(argv[0], "No fd passed to fstat");
47    int fd = atoi(argv[2]);
48    struct stat buf;
49    int rc = fstat(fd, &buf);
50    if (rc < 0) {
51      int ret = errno;
52      perror("fstat");
53      return ret;
54    }
55    return 0;
56  }
57
58  usage(argv[0], "Unknown command");
59}
60