/* 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/. */
/*
* 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>
static char * child_argv[] = {
"pipepong" , NULL};
#define NUM_ITERATIONS
10
int main(
int argc,
char ** argv) {
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 ;
}
}
Messung V0.5 in Prozent C=91 H=93 G=91
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-09-27)
¤
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