35 lines
854 B
C
35 lines
854 B
C
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// Demonstrates fillling a pipe which only occasionally gets read from
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#define BUFSIZE 1024
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int main(int argc, char *argv[]){
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int pip[2];
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pipe(pip);
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int pid = fork();
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if(pid == 0){ // CHILD
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char buf[BUFSIZE];
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while(1){
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sleep(1); // sleep then...
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printf("Reading ...\n");
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fflush(stdout);
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read(pip[0], buf, BUFSIZE); // empty the pipe a bit
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}
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}
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else{ // PARENT
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for(int i=1; ; i++){ // keep writing to the pipe
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char c = '-';
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write(pip[1], &c, 1); // blocks when pipe is full
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printf("Wrote %d so far\n",i);
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fflush(stdout);
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}
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}
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return 0;
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}
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