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pipeping.c
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00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
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00015  * The Original Code is the Netscape Portable Runtime (NSPR).
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00024  * Alternatively, the contents of this file may be used under the terms of
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00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 /*
00039  * File: pipeping.c
00040  *
00041  * Description:
00042  * This test runs in conjunction with the pipepong test.
00043  * This test creates two pipes and redirects the stdin and
00044  * stdout of the pipepong test to the pipes.  Then this
00045  * test writes "ping" to the pipepong test and the pipepong
00046  * test writes "pong" back.  To run this pair of tests,
00047  * just invoke pipeping.
00048  *
00049  * Tested areas: process creation, pipes, file descriptor
00050  * inheritance, standard I/O redirection.
00051  */
00052 
00053 #include "prerror.h"
00054 #include "prio.h"
00055 #include "prproces.h"
00056 
00057 #include <stdio.h>
00058 #include <stdlib.h>
00059 #include <string.h>
00060 
00061 #ifdef XP_OS2
00062 static char *child_argv[] = { "pipepong.exe", NULL };
00063 #else
00064 static char *child_argv[] = { "pipepong", NULL };
00065 #endif
00066 
00067 #define NUM_ITERATIONS 10
00068 
00069 int main()
00070 {
00071     PRFileDesc *in_pipe[2];
00072     PRFileDesc *out_pipe[2];
00073     PRStatus status;
00074     PRProcess *process;
00075     PRProcessAttr *attr;
00076     char buf[1024];
00077     PRInt32 nBytes;
00078     PRInt32 exitCode;
00079     int idx;
00080 
00081     status = PR_CreatePipe(&in_pipe[0], &in_pipe[1]);
00082     if (status == PR_FAILURE) {
00083         fprintf(stderr, "PR_CreatePipe failed\n");
00084         exit(1);
00085     }
00086     status = PR_CreatePipe(&out_pipe[0], &out_pipe[1]);
00087     if (status == PR_FAILURE) {
00088         fprintf(stderr, "PR_CreatePipe failed\n");
00089         exit(1);
00090     }
00091 
00092     status = PR_SetFDInheritable(in_pipe[0], PR_FALSE);
00093     if (status == PR_FAILURE) {
00094         fprintf(stderr, "PR_SetFDInheritable failed\n");
00095         exit(1);
00096     }
00097     status = PR_SetFDInheritable(in_pipe[1], PR_TRUE);
00098     if (status == PR_FAILURE) {
00099         fprintf(stderr, "PR_SetFDInheritable failed\n");
00100         exit(1);
00101     }
00102     status = PR_SetFDInheritable(out_pipe[0], PR_TRUE);
00103     if (status == PR_FAILURE) {
00104         fprintf(stderr, "PR_SetFDInheritable failed\n");
00105         exit(1);
00106     }
00107     status = PR_SetFDInheritable(out_pipe[1], PR_FALSE);
00108     if (status == PR_FAILURE) {
00109         fprintf(stderr, "PR_SetFDInheritable failed\n");
00110         exit(1);
00111     }
00112 
00113     attr = PR_NewProcessAttr();
00114     if (attr == NULL) {
00115         fprintf(stderr, "PR_NewProcessAttr failed\n");
00116         exit(1);
00117     }
00118 
00119     PR_ProcessAttrSetStdioRedirect(attr, PR_StandardInput, out_pipe[0]);
00120     PR_ProcessAttrSetStdioRedirect(attr, PR_StandardOutput, in_pipe[1]);
00121 
00122     process = PR_CreateProcess(child_argv[0], child_argv, NULL, attr);
00123     if (process == NULL) {
00124         fprintf(stderr, "PR_CreateProcess failed\n");
00125         exit(1);
00126     }
00127     PR_DestroyProcessAttr(attr);
00128     status = PR_Close(out_pipe[0]);
00129     if (status == PR_FAILURE) {
00130         fprintf(stderr, "PR_Close failed\n");
00131         exit(1);
00132     }
00133     status = PR_Close(in_pipe[1]);
00134     if (status == PR_FAILURE) {
00135         fprintf(stderr, "PR_Close failed\n");
00136         exit(1);
00137     }
00138 
00139     for (idx = 0; idx < NUM_ITERATIONS; idx++) {
00140         strcpy(buf, "ping");
00141         printf("ping process: sending \"%s\"\n", buf);
00142         nBytes = PR_Write(out_pipe[1], buf, 5);
00143         if (nBytes == -1) {
00144             fprintf(stderr, "PR_Write failed: (%d, %d)\n", PR_GetError(),
00145                     PR_GetOSError());
00146             exit(1);
00147         }
00148         memset(buf, 0, sizeof(buf));
00149         nBytes = PR_Read(in_pipe[0], buf, sizeof(buf));
00150         if (nBytes == -1) {
00151             fprintf(stderr, "PR_Read failed: (%d, %d)\n",
00152                     PR_GetError(), PR_GetOSError());
00153             exit(1);
00154         }
00155         printf("ping process: received \"%s\"\n", buf);
00156         if (nBytes != 5) {
00157             fprintf(stderr, "ping process: expected 5 bytes but got %d bytes\n",
00158                     nBytes);
00159             exit(1);
00160         }
00161         if (strcmp(buf, "pong") != 0) {
00162             fprintf(stderr, "ping process: expected \"pong\" but got \"%s\"\n",
00163                     buf);
00164             exit(1);
00165         }
00166     }
00167 
00168     status = PR_Close(in_pipe[0]);
00169     if (status == PR_FAILURE) {
00170         fprintf(stderr, "PR_Close failed\n");
00171         exit(1);
00172     }
00173     status = PR_Close(out_pipe[1]);
00174     if (status == PR_FAILURE) {
00175         fprintf(stderr, "PR_Close failed\n");
00176         exit(1);
00177     }
00178     status = PR_WaitProcess(process, &exitCode);
00179     if (status == PR_FAILURE) {
00180         fprintf(stderr, "PR_WaitProcess failed\n");
00181         exit(1);
00182     }
00183     if (exitCode == 0) {
00184         printf("PASS\n");
00185         return 0;
00186     } else {
00187         printf("FAIL\n");
00188         return 1;
00189     }
00190 }