pipepong.c (1688B)
1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* This Source Code Form is subject to the terms of the Mozilla Public 3 * License, v. 2.0. If a copy of the MPL was not distributed with this 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 5 6 /* 7 * File: pipepong.c 8 * 9 * Description: 10 * This test runs in conjunction with the pipeping test. 11 * The pipeping test creates two pipes and redirects the 12 * stdin and stdout of this test to the pipes. Then the 13 * pipeping test writes "ping" to this test and this test 14 * writes "pong" back. Note that this test does not depend 15 * on NSPR at all. To run this pair of tests, just invoke 16 * pipeping. 17 * 18 * Tested areas: process creation, pipes, file descriptor 19 * inheritance, standard I/O redirection. 20 */ 21 22 #include <stdio.h> 23 #include <string.h> 24 #include <stdlib.h> 25 26 #define NUM_ITERATIONS 10 27 28 int main(int argc, char** argv) { 29 char buf[1024]; 30 size_t nBytes; 31 int idx; 32 33 for (idx = 0; idx < NUM_ITERATIONS; idx++) { 34 memset(buf, 0, sizeof(buf)); 35 nBytes = fread(buf, 1, 5, stdin); 36 fprintf(stderr, "pong process: received \"%s\"\n", buf); 37 if (nBytes != 5) { 38 fprintf(stderr, "pong process: expected 5 bytes but got %d bytes\n", 39 nBytes); 40 exit(1); 41 } 42 if (strcmp(buf, "ping") != 0) { 43 fprintf(stderr, "pong process: expected \"ping\" but got \"%s\"\n", buf); 44 exit(1); 45 } 46 47 strcpy(buf, "pong"); 48 fprintf(stderr, "pong process: sending \"%s\"\n", buf); 49 nBytes = fwrite(buf, 1, 5, stdout); 50 if (nBytes != 5) { 51 fprintf(stderr, "pong process: fwrite failed\n"); 52 exit(1); 53 } 54 fflush(stdout); 55 } 56 57 return 0; 58 }