/* 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 : pipepong2 . c
*
* Description :
* This test runs in conjunction with the pipeping2 test .
* The pipeping2 test creates two pipes and passes two
* pipe fd ' s to this test . Then the pipeping2 test writes
* " ping " to this test and this test writes " pong " back .
* To run this pair of tests , just invoke pipeping2 .
*
* Tested areas : process creation , pipes , file descriptor
* inheritance .
*/
#include "prerror.h"
#include "prio.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define NUM_ITERATIONS
10
int main(
int argc,
char ** argv) {
PRFileDesc *pipe_read, *pipe_write;
PRStatus status;
char buf[
1024 ];
PRInt32 nBytes;
int idx;
pipe_read = PR_GetInheritedFD(
"PIPE_READ" );
if (pipe_read == NULL) {
fprintf(stderr,
"PR_GetInheritedFD failed\n" );
exit (
1 );
}
status = PR_SetFDInheritable(pipe_read, PR_FALSE);
if (status == PR_FAILURE) {
fprintf(stderr,
"PR_SetFDInheritable failed\n" );
exit (
1 );
}
pipe_write = PR_GetInheritedFD(
"PIPE_WRITE" );
if (pipe_write == NULL) {
fprintf(stderr,
"PR_GetInheritedFD failed\n" );
exit (
1 );
}
status = PR_SetFDInheritable(pipe_write, PR_FALSE);
if (status == PR_FAILURE) {
fprintf(stderr,
"PR_SetFDInheritable failed\n" );
exit (
1 );
}
for (idx =
0 ; idx < NUM_ITERATIONS; idx++) {
memset(buf,
0 ,
sizeof (buf));
nBytes = PR_Read(pipe_read, buf,
sizeof (buf));
if (nBytes == -
1 ) {
fprintf(stderr,
"PR_Read failed: (%d, %d)\n" , PR_GetError(),
PR_GetOSError());
exit (
1 );
}
printf(
"pong process: received \" %s\
"\n" , buf);
if (nBytes !=
5 ) {
fprintf(stderr,
"pong process: expected 5 bytes but got %d bytes\n" ,
nBytes);
exit (
1 );
}
if (strcmp(buf,
"ping" ) !=
0 ) {
fprintf(stderr,
"pong process: expected \" ping\
" but got \" %s\
"\n" , buf);
exit (
1 );
}
strcpy(buf,
"pong" );
printf(
"pong process: sending \" %s\
"\n" , buf);
nBytes = PR_Write(pipe_write, buf,
5 );
if (nBytes == -
1 ) {
fprintf(stderr,
"PR_Write failed\n" );
exit (
1 );
}
}
status = PR_Close(pipe_read);
if (status == PR_FAILURE) {
fprintf(stderr,
"PR_Close failed\n" );
exit (
1 );
}
status = PR_Close(pipe_write);
if (status == PR_FAILURE) {
fprintf(stderr,
"PR_Close failed\n" );
exit (
1 );
}
return 0 ;
}
Messung V0.5 in Prozent C=89 H=97 G=93
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-09-29)
¤
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