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
usage(const char * program,const char * error)31 void 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
main(int argc,char ** argv,char ** envp)38 int 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