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 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 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
