pipeping.c

Netscape NSPR库源码

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is the Netscape Portable Runtime (NSPR).
 * 
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are 
 * Copyright (C) 1999-2000 Netscape Communications Corporation.  All
 * Rights Reserved.
 * 
 * Contributor(s):
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL"), in which case the provisions of the GPL are applicable 
 * instead of those above.  If you wish to allow use of your 
 * version of this file only under the terms of the GPL and not to
 * allow others to use your version of this file under the MPL,
 * indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by
 * the GPL.  If you do not delete the provisions above, a recipient
 * may use your version of this file under either the MPL or the
 * GPL.
 */

/*
 * File: pipeping.c
 *
 * Description:
 * This test runs in conjunction with the pipepong test.
 * This test creates two pipes and redirects the stdin and
 * stdout of the pipepong test to the pipes.  Then this
 * test writes "ping" to the pipepong test and the pipepong
 * test writes "pong" back.  To run this pair of tests,
 * just invoke pipeping.
 *
 * Tested areas: process creation, pipes, file descriptor
 * inheritance, standard I/O redirection.
 */

#include "prerror.h"
#include "prio.h"
#include "prproces.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#ifdef XP_OS2
static char *child_argv[] = { "pipepong.exe", NULL };
#else
static char *child_argv[] = { "pipepong", NULL };
#endif

#define NUM_ITERATIONS 10

int main()
{
    PRFileDesc *in_pipe[2];
    PRFileDesc *out_pipe[2];
    PRStatus status;
    PRProcess *process;
    PRProcessAttr *attr;
    char buf[1024];
    PRInt32 nBytes;
    PRInt32 exitCode;
    int idx;

    status = PR_CreatePipe(&in_pipe[0], &in_pipe[1]);
    if (status == PR_FAILURE) {
        fprintf(stderr, "PR_CreatePipe failed\n");
        exit(1);
    }
    status = PR_CreatePipe(&out_pipe[0], &out_pipe[1]);
    if (status == PR_FAILURE) {
        fprintf(stderr, "PR_CreatePipe failed\n");
        exit(1);
    }

    status = PR_SetFDInheritable(in_pipe[0], PR_FALSE);
    if (status == PR_FAILURE) {
        fprintf(stderr, "PR_SetFDInheritable failed\n");
        exit(1);
    }
    status = PR_SetFDInheritable(in_pipe[1], PR_TRUE);
    if (status == PR_FAILURE) {
        fprintf(stderr, "PR_SetFDInheritable failed\n");
        exit(1);
    }
    status = PR_SetFDInheritable(out_pipe[0], PR_TRUE);
    if (status == PR_FAILURE) {
        fprintf(stderr, "PR_SetFDInheritable failed\n");
        exit(1);
    }
    status = PR_SetFDInheritable(out_pipe[1], PR_FALSE);
    if (status == PR_FAILURE) {
        fprintf(stderr, "PR_SetFDInheritable failed\n");
        exit(1);
    }

    attr = PR_NewProcessAttr();
    if (attr == NULL) {
        fprintf(stderr, "PR_NewProcessAttr failed\n");
        exit(1);
    }

    PR_ProcessAttrSetStdioRedirect(attr, PR_StandardInput, out_pipe[0]);
    PR_ProcessAttrSetStdioRedirect(attr, PR_StandardOutput, in_pipe[1]);

    process = PR_CreateProcess(child_argv[0], child_argv, NULL, attr);
    if (process == NULL) {
        fprintf(stderr, "PR_CreateProcess failed\n");
        exit(1);
    }
    PR_DestroyProcessAttr(attr);
    status = PR_Close(out_pipe[0]);
    if (status == PR_FAILURE) {
        fprintf(stderr, "PR_Close failed\n");
        exit(1);
    }
    status = PR_Close(in_pipe[1]);
    if (status == PR_FAILURE) {
        fprintf(stderr, "PR_Close failed\n");
        exit(1);
    }

    for (idx = 0; idx < NUM_ITERATIONS; idx++) {
        strcpy(buf, "ping");
        printf("ping process: sending \"%s\"\n", buf);
        nBytes = PR_Write(out_pipe[1], buf, 5);
        if (nBytes == -1) {
            fprintf(stderr, "PR_Write failed: (%d, %d)\n", PR_GetError(),
                    PR_GetOSError());
            exit(1);
        }
        memset(buf, 0, sizeof(buf));
        nBytes = PR_Read(in_pipe[0], buf, sizeof(buf));
        if (nBytes == -1) {
            fprintf(stderr, "PR_Read failed: (%d, %d)\n",
                    PR_GetError(), PR_GetOSError());
            exit(1);
        }
        printf("ping process: received \"%s\"\n", buf);
        if (nBytes != 5) {
            fprintf(stderr, "ping process: expected 5 bytes but got %d bytes\n",
                    nBytes);
            exit(1);
        }
        if (strcmp(buf, "pong") != 0) {
            fprintf(stderr, "ping process: expected \"pong\" but got \"%s\"\n",
                    buf);
            exit(1);
        }
    }

    status = PR_Close(in_pipe[0]);
    if (status == PR_FAILURE) {
        fprintf(stderr, "PR_Close failed\n");
        exit(1);
    }
    status = PR_Close(out_pipe[1]);
    if (status == PR_FAILURE) {
        fprintf(stderr, "PR_Close failed\n");
        exit(1);
    }
    status = PR_WaitProcess(process, &exitCode);
    if (status == PR_FAILURE) {
        fprintf(stderr, "PR_WaitProcess failed\n");
        exit(1);
    }
    if (exitCode == 0) {
        printf("PASS\n");
        return 0;
    } else {
        printf("FAIL\n");
        return 1;
    }
}