104 lines
1.7 KiB
C
104 lines
1.7 KiB
C
/*
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* This is just some code behind the curtain.
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* You really don't need to touch this.
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*
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*/
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#include <stdio.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <errno.h>
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#include "helpers.h"
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int do_quit = 0;
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int do_reload = 0;
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int load_config(void) {
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static char firsttime_message[] = "Loading";
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static char subsequent_message[] = "Reloading";
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static char *message = firsttime_message;
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fprintf(stderr, "%s configuration... ", message);
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fprintf(stderr, "done.\n");
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message = subsequent_message;
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do_reload = 0;
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return 1;
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}
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int main_loop(void) {
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fd_set rfds;
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struct timeval tv;
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int retval;
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char buf[1024];
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ssize_t len;
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#if 0
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/* fork() to the background */
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if(fork()) return 0;
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#endif
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fprintf(stderr, "I'm just a simple daemon, my PID is: %i\n",
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getpid());
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while (!do_quit) {
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/*
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* Let's just do our really simple job:
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* Copy stdin to stdout (just another cat(1)).
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*/
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if (do_reload) {
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load_config();
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}
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/* Watch stdin (fd 0) to see when it has input. */
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FD_ZERO(&rfds);
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FD_SET(0, &rfds);
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/* Wait up to five seconds. */
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tv.tv_sec = 5;
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tv.tv_usec = 0;
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retval = select(1, &rfds, NULL, NULL, &tv);
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/* Don't rely on the value of tv now! */
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if (retval == -1) {
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if (errno == EINTR) {
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continue;
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}
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perror("select()");
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continue;
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}
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if (retval == 0) {
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/* fprintf(stderr, "Timeout reached.\n"); */
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continue;
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}
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if (!FD_ISSET(0, &rfds)) {
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fprintf(stderr, "BUG: Empty read-set, this should"
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" never happen. Never ever. Really! :-)\n");
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continue;
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}
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len = read(0, buf, sizeof(buf) - 1);
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if (len < 0) {
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perror("read()");
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continue;
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}
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buf[len] = 0;
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printf("%s", buf);
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if (len == 0) {
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do_quit = 1;
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}
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}
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return 1;
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}
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