The Tor Browser: nsprpub/pr/tests/pipepong.c@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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/. */

     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  */

    22 #include <stdio.h>

    23 #include <string.h>

    24 #include <stdlib.h>

    26 #define NUM_ITERATIONS 10

    28 int main(int argc, char **argv)

    29 {

    30     char buf[1024];

    31     size_t nBytes;

    32     int idx;

    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         }

    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     }

    59     return 0;

    60 }

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