{}
#include <stdio.h>
#include <unistd.h>
#include <string.h>
int main() {
int fd[2];
pipe(fd);
if (fork() == 0) {
// Filho = filtro (grep ERROR)
close(fd[1]);
char buffer[256];
ssize_t n;
while ((n = read(fd[0], buffer, sizeof(buffer) - 1)) > 0) {
buffer[n] = '\0';
if (strstr(buffer, "ERROR")) {
printf("Filtrado: %s", buffer);
}
}
} else {
// Pai = produtor de logs
close(fd[0]);
char *logs[] = {
"INFO Sistema OK\n",
"ERROR Falha no disco\n",
"INFO Reiniciando\n",
"ERROR Timeout\n"
};
for (int i = 0; i < 4; i++) {
write(fd[1], logs[i], strlen(logs[i]));
sleep(1);
}
}
}