gecko-dev/nsprpub/pr/tests/forktest.c

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/***********************************************************************
**
** Name: forktest.c
**
** Description: UNIX test for fork functions.
**
** Modification History:
** 15-May-97 AGarcia- Converted the test to accomodate the debug_mode flag.
**                 The debug mode will print all of the printfs associated with this test.
**                         The regress mode will be the default mode. Since the regress tool limits
**           the output to a one line status:PASS or FAIL,all of the printf statements
**                         have been handled with an if (debug_mode) statement.
** 04-June-97 AGarcia removed the Test_Result function. Regress tool has been updated to
**                        recognize the return code from tha main program.
** 12-June-97 AGarcic - Revert to return code 0 and 1, remove debug option (obsolete).
***********************************************************************/

/***********************************************************************
** Includes
***********************************************************************/
/* Used to get the command line option */
#include "plgetopt.h"

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

PRIntn failed_already=0;

#ifdef XP_UNIX

#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <errno.h>

static char *message = "Hello world!";

static void
ClientThreadFunc(void *arg)
{
    PRNetAddr addr;
    PRFileDesc *sock = NULL;
    PRInt32 tmp = (PRInt32)arg;

    /*
     * Make sure the PR_Accept call will block
     */

    printf("Wait one second before connect\n");
    fflush(stdout);
    PR_Sleep(PR_SecondsToInterval(1));

    addr.inet.family = AF_INET;
    addr.inet.ip = PR_htonl(INADDR_ANY);
    addr.inet.port = 0;
    if ((sock = PR_NewTCPSocket()) == NULL) {
        fprintf(stderr, "failed to create TCP socket: error code %d\n",
                PR_GetError());
        failed_already = 1;
        goto finish;
    }
    if (PR_Bind(sock, &addr) != PR_SUCCESS) {
        fprintf(stderr, "PR_Bind failed: error code %d\n",
                PR_GetError());
        failed_already = 1;
        goto finish;
    }
    addr.inet.ip = PR_htonl(INADDR_LOOPBACK);
    addr.inet.port = PR_htons((PRInt16)tmp);
    printf("Connecting to port %hu\n", PR_ntohs(addr.inet.port));
    fflush(stdout);
    if (PR_Connect(sock, &addr, PR_SecondsToInterval(5)) !=
        PR_SUCCESS) {
        fprintf(stderr, "PR_Connect failed: error code %d\n",
                PR_GetError());
        failed_already = 1;
        goto finish;
    }
    printf("Writing message \"%s\"\n", message);
    fflush(stdout);
    if (PR_Send(sock, message, strlen(message) + 1, 0, PR_INTERVAL_NO_TIMEOUT) ==
        -1) {
        fprintf(stderr, "PR_Send failed: error code %d\n",
                PR_GetError());
        failed_already = 1;
        goto finish;
    }
finish:
    if (sock) {
        PR_Close(sock);
    }
    return;
}

/*
 * DoIO --
 *     This function creates a thread that acts as a client and itself.
 *     acts as a server.  Then it joins the client thread.
 */
static void
DoIO(void)
{
    PRThread *clientThread;
    PRFileDesc *listenSock = NULL;
    PRFileDesc *sock = NULL;
    PRNetAddr addr;
    PRInt32 nBytes;
    char buf[128];

    listenSock = PR_NewTCPSocket();
    if (!listenSock) {
        fprintf(stderr, "failed to create a TCP socket: error code %d\n",
                PR_GetError());
        failed_already = 1;
        goto finish;
    }
    addr.inet.family = AF_INET;
    addr.inet.ip = PR_htonl(INADDR_ANY);
    addr.inet.port = 0;
    if (PR_Bind(listenSock, &addr) == PR_FAILURE) {
        fprintf(stderr, "failed to bind socket: error code %d\n",
                PR_GetError());
        failed_already = 1;
        goto finish;
    }
    if (PR_GetSockName(listenSock, &addr) == PR_FAILURE) {
        fprintf(stderr, "failed to get socket port number: error code %d\n",
                PR_GetError());
        failed_already = 1;
        goto finish;
    }
    if (PR_Listen(listenSock, 5) == PR_FAILURE) {
        fprintf(stderr, "PR_Listen failed: error code %d\n",
                PR_GetError());
        failed_already = 1;
        goto finish;
    }
    clientThread = PR_CreateThread( PR_USER_THREAD, ClientThreadFunc,
                                    (void *) PR_ntohs(addr.inet.port), PR_PRIORITY_NORMAL, PR_LOCAL_THREAD,
                                    PR_JOINABLE_THREAD, 0);
    if (clientThread == NULL) {
        fprintf(stderr, "Cannot create client thread: (%d, %d)\n",
                PR_GetError(), PR_GetOSError());
        failed_already = 1;
        goto finish;
    }
    printf("Accepting connection at port %hu\n", PR_ntohs(addr.inet.port));
    fflush(stdout);
    sock = PR_Accept(listenSock, &addr, PR_SecondsToInterval(5));
    if (!sock) {
        fprintf(stderr, "PR_Accept failed: error code %d\n",
                PR_GetError());
        failed_already = 1;
        goto finish;
    }
    nBytes = PR_Recv(sock, buf, sizeof(buf), 0, PR_INTERVAL_NO_TIMEOUT);
    if (nBytes == -1) {
        fprintf(stderr, "PR_Recv failed: error code %d\n",
                PR_GetError());
        failed_already = 1;
        goto finish;
    }

    /*
     * Make sure it has proper null byte to mark end of string
     */

    buf[sizeof(buf) - 1] = '\0';
    printf("Received \"%s\" from the client\n", buf);
    fflush(stdout);
    if (!strcmp(buf, message)) {
        PR_JoinThread(clientThread);

        printf("The message is received correctly\n");
        fflush(stdout);
    } else {
        fprintf(stderr, "The message should be \"%s\"\n",
                message);
        failed_already = 1;
    }

finish:
    if (listenSock) {
        PR_Close(listenSock);
    }
    if (sock) {
        PR_Close(sock);
    }
    return;
}

int main(int argc, char **argv)
{
    pid_t pid;

    /* main test program */

    DoIO();

    pid = fork();

    if (pid  == (pid_t) -1) {
        fprintf(stderr, "Fork failed: errno %d\n", errno);
        failed_already=1;
        return 1;
    } else if (pid > 0) {
        int childStatus;

        printf("Fork succeeded.  Parent process continues.\n");
        DoIO();
        if (waitpid(pid, &childStatus, 0) != pid) {
            {
                fprintf(stderr, "waitpid failed: %d\n", errno);
                failed_already = 1;
            }
        } else if (!WIFEXITED(childStatus)
                   || WEXITSTATUS(childStatus) != 0) {
            failed_already = 1;
        }
        printf("Parent process exits.\n");
        if (!failed_already) {
            printf("PASSED\n");
        } else {
            printf("FAILED\n");
        }
        return failed_already;
    } else {
        printf("Fork succeeded.  Child process continues.\n");
        DoIO();
        printf("Child process exits.\n");
        return failed_already;
    }
}

#else  /* XP_UNIX */

int main(    int     argc,
             char   *argv[]
        )
{

    printf("The fork test is applicable to Unix only.\n");
    return 0;

}

#endif  /* XP_UNIX */