/ **************************************************************** * * Purpose: Basic example of pipe. * Read and write variable length records across a pipe. * * Author: M J Leslie * * Date: 17 Apr 96 * ****************************************************************/ #include <sys/types.h> #include <unistd.h> /* pipe. */ #include <signal.h> void Child (pid_t Handle); void Parent (pid_t Handle); main() { pid_t Pid; int fd[2]; pipe(fd); /* Create two file descriptors */ Pid = fork(); if ( Pid == 0) /* Child */ { close(fd[0]); Child(fd[1]); puts("Child end"); } else /* Parent */ { close(fd[1]); Parent(fd[0]); puts("Parent end"); } } /**************************************************************** * * The Child sends data to the parent. * ****************************************************************/ void Child(pid_t Handle) { int Len; char Buff[50]="Bass Beer"; Len = strlen(Buff)+1; write(Handle, &Len, sizeof(Len)); write(Handle, Buff, Len); strcpy(Buff, "Wild times."); Len = strlen(Buff)+1; write(Handle, &Len, sizeof(Len)); write(Handle, Buff, Len); strcpy(Buff, "Alex was ere."); Len = strlen(Buff)+1; write(Handle, &Len, sizeof(Len)); write(Handle, Buff, Len); strcpy(Buff, "Bon Jovi rules the world."); Len = strlen(Buff)+1; write(Handle, &Len, sizeof(Len)); write(Handle, Buff, Len); close(Handle); } /**************************************************************** * * Read the data sent by the child. * ****************************************************************/ void Parent(pid_t Handle) { int Len; char Buff[50]; /* ... Perform two reads. THe first gets the length of the data ... the second gets the actual data. */ while (read(Handle, &Len, sizeof(Len)) > 0) { read(Handle,Buff, Len); printf("%s\n", Buff); } }
file: /Techref/language/ccpp/cref/EXAMPLES/pipe2.c, 1KB, , updated: 1997/4/21 09:52, local time: 2024/8/14 18:30,
18.191.240.50:LOG IN
|
©2024 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions? <A HREF="http://piclist.com/techref/language/ccpp/cref/EXAMPLES/pipe2.c"> language ccpp cref EXAMPLES pipe2</A> |
Did you find what you needed? |
![]() o List host: MIT, Site host massmind.org, Top posters @none found - Page Editors: James Newton, David Cary, and YOU! * Roman Black of Black Robotics donates from sales of Linistep stepper controller kits. * Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters. * Monthly Subscribers: Gregg Rew. on-going support is MOST appreciated! * Contributors: Richard Seriani, Sr. |
Welcome to piclist.com! |
.