[icecast-dev] PROBLEM REPORT (and example): EPIPE errors

Ricardo Galli gallir at uib.es
Sun Mar 3 08:32:53 PST 2002

This small example will make icecast unusable after few seconds. The problem 
resides on EPIPE received when trying to send the first (58) bytes of the 
vorbis predata.

Change the URL for your own, and try it in a LAN.

I have no idea on the reasons of these errors, altough I suspect it's related 
to the fact that the headers are sent in blocking state and then we change to 
non-blocking. I will try to put all headers in a refbuf and append it to the 
client queue.

for i in `seq 100`
do echo $i
timelimit -s 3 wget -q http://mcrg.uib.es:8000/live.ogg & 
timelimit -s 3 wget -q http://mcrg.uib.es:8000/live.ogg & 
timelimit -s 3 wget -q http://mcrg.uib.es:8000/live.ogg

<p>(timelimit is a small program in C to limit the execution of the command to 3 
wallclock seconds).

#include <stdlib.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

<p><p>pid_t pid, ended=0;

void wakeup(int s)
        printf("Signal %d received\n", s);
        kill(pid, SIGTERM);

        printf("timelimit {-s secs | -m mins} commands arg1 arg2...\n");

<p>main(int argc, char *argv[])
        int i, seconds = -1;

        i = 1;
        if (argc > 3) {
                if (strcmp(argv[i], "-s") == 0)
                        seconds = atoi(argv[i+1]);
                else if (strcmp(argv[i], "-m") == 0)
                        seconds = atoi(argv[i+1]) * 60;
        if (seconds <= 0) usage();

        if((pid = fork()) == 0) {
                execvp(argv[3], &argv[3]);
                printf("Error in exec\n");

<p>        signal(SIGALRM, wakeup);
        while(ended != pid) {
                ended = wait(NULL);


"I just stopped using Windows and now you tell me to use Mirrors?" 
    - said Aunt Tillie, just before downloading 2.5.3 kernel.

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