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comparison: nsprpub/pr/tests/pipepong.c
nsprpub/pr/tests/pipepong.c
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| 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 { | |
| 30 char buf[1024]; | |
| 31 size_t nBytes; | |
| 32 int idx; | |
| 33 | |
| 34 for (idx = 0; idx < NUM_ITERATIONS; idx++) { | |
| 35 memset(buf, 0, sizeof(buf)); | |
| 36 nBytes = fread(buf, 1, 5, stdin); | |
| 37 fprintf(stderr, "pong process: received \"%s\"\n", buf); | |
| 38 if (nBytes != 5) { | |
| 39 fprintf(stderr, "pong process: expected 5 bytes but got %d bytes\n", | |
| 40 nBytes); | |
| 41 exit(1); | |
| 42 } | |
| 43 if (strcmp(buf, "ping") != 0) { | |
| 44 fprintf(stderr, "pong process: expected \"ping\" but got \"%s\"\n", | |
| 45 buf); | |
| 46 exit(1); | |
| 47 } | |
| 48 | |
| 49 strcpy(buf, "pong"); | |
| 50 fprintf(stderr, "pong process: sending \"%s\"\n", buf); | |
| 51 nBytes = fwrite(buf, 1, 5, stdout); | |
| 52 if (nBytes != 5) { | |
| 53 fprintf(stderr, "pong process: fwrite failed\n"); | |
| 54 exit(1); | |
| 55 } | |
| 56 fflush(stdout); | |
| 57 } | |
| 58 | |
| 59 return 0; | |
| 60 } |
