Hello, i have done a script that is supposed to read urls from the SOURCE. When a user types in vg.no in stdin or read a file that contains vg.no it gets the last 5/6 topics from the newspaper. the problem here is that from pipe 0 to write pipe 1 somthing goes wrong and it doenst do the cut,grep or sed ? can any 1 help me out here ?
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <string.h>
#include <errno.h>
#define SOURCE "http://startsiden.no/sport/nyheter/"
#define LESFRA 0 //read from
#define SKRIVTIL 1 //write to
#define STDIN 0
#define STDOUT 1
#define STDERR 2
int lesURL(char* URL); //url from stdinn
int main(int argc,char *argv[]){
int antall;
int omFil = open(argv[1], O_RDONLY);
char buffer[256];
if (omFil >= 0)
{ /* argument er fil */ //if file
while ( (antall=read(omFil, buffer, 254)) ) {
buffer[antall-1]=0;
lesURL(buffer);
}
return 0;
exit(0);
}
else
{ /* Les argumenter fra stdin if stdin */
while ( (antall = read(0, buffer, 254)) )
{
buffer[antall-1]=0;
lesURL(buffer);
}
}
return 0;
exit(0);
}
int lesURL(char* URL) {
pid_t nyPid[4];
//int nyPid[4];
int piper[4][3];
/* lynx SOURCE*/
pipe(piper[0]);
nyPid[1] = fork();
if (nyPid[1]==0) {
dup2(piper[0][SKRIVTIL],STDOUT);
execl( "/usr/bin/lynx", "lynx", "-dump", SOURCE, 0);
}
/* grep URL */
pipe(piper[1]);
nyPid[2]=fork();
if(nyPid[2]==0) {
dup2(piper[0][LESFRA], STDIN);
dup2(piper[2][SKRIVTIL], STDOUT);
execlp("grep", "grep", URL, 0);
}
/* cut -d '.' -f1 */
pipe(piper[2]);
nyPid[3] = fork();
if (nyPid[3]==0) {
dup2(piper[1][LESFRA],STDIN);
dup2(piper[2][SKRIVTIL], STDOUT);
execlp("cut", "cut","-d", ".", "-f1",0);
}
/* sed -e s/\ //g */
/* pipe(piper[3]);*/
nyPid[4] = fork();
if (nyPid[4] == 0) {
dup2(piper[2][LESFRA], STDIN);
execlp("sed", "sed", "-e", "s/\\ //g", 0);
}
waitpid(nyPid[1], NULL, 0);
waitpid(nyPid[2], NULL, 0);
waitpid(nyPid[3], NULL, 0);
waitpid(nyPid[4], NULL, 0);
return (0);
}:rolleyes: