.PU
.TH FILED 1 "06 Feb 14" "filed 1.0"
.SH NAME
filed \- serve files over HTTP
.SH SYNOPSIS
.ll +10
.B filed
.RB [{ \-h | \-\-help }]
.RB [{ \-d | \-\-daemon }]
.RB [{ \-b | \-\-bind }
.IR address ]
.RB [{ \-p | \-\-port }
.IR port ]
.RB [{ \-t | \-\-threads }
.IR count ]
.RB [{ \-c | \-\-cache }

serves files over HTTP as minimally as possible.  Only static files (i.e., files that never change or are replaced) are supported.

.SH OPTIONS
.TP
.B -h (or --help)
Prints detailed usage information

.TP
.B -d (or --daemon)
Instructs filed to become a daemon after initializing
the listening TCP socket and log files.

.TP
.B -b (or --bind)
Specifies the address to listen for incoming HTTP
requests on.

.TP
.B -p (or --port)

#include <sys/sendfile.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <pthread.h>
#include <strings.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <getopt.h>

	if (extra) {
		fprintf(output, "%s\n", extra);
	}

	fprintf(output, "Usage: filed [<options>]\n");
	fprintf(output, "  Options:\n");
	fprintf(output, "      -h, --help\n");
	fprintf(output, "      -d, --daemon\n");
	fprintf(output, "      -b <address>, --bind <address>\n");
	fprintf(output, "      -p <port>, --port <port>\n");
	fprintf(output, "      -t <count>, --threads <count>\n");
	fprintf(output, "      -c <entries>, --cache <entries>\n");
	fprintf(output, "      -u <user>, --user <user>\n");
	fprintf(output, "      -r <directory>, --root <directory>\n");

	if (long_help) {
		fprintf(output, "\n");
		fprintf(output, "  Usage:\n");
		fprintf(output, "      -h (or --help) prints this usage information\n");
		fprintf(output, "\n");
		fprintf(output, "      -d (or --daemon) instructs filed to become a daemon after initializing\n");
		fprintf(output, "                       the listening TCP socket and log files.\n");
		fprintf(output, "\n");
		fprintf(output, "      -b (or --bind) specifies the address to listen for incoming HTTP\n");
		fprintf(output, "                     requests on.  The default value is \"%s\".\n", BIND_ADDR);
		fprintf(output, "\n");
		fprintf(output, "      -p (or --port) specifies the TCP port number to listen for incoming HTTP\n");
		fprintf(output, "                     requests on.  The default is %u.\n", (unsigned int) PORT);
		fprintf(output, "\n");

		return(1);
	}

	*user_id = user_id_check;

	return(0);
}

/* Daemonize */
static int filed_daemonize(void) {
	pid_t setsid_ret, fork_ret;
	int chdir_ret, dup2_ret;
	int fd_in, fd_out;

	chdir_ret = chdir("/");
	if (chdir_ret != 0) {
		return(1);
	}

	fork_ret = fork();
	if (fork_ret < 0) {
		return(1);
	}

	if (fork_ret > 0) {
		/* Parent */
		waitpid(fork_ret, NULL, 0);

		exit(EXIT_SUCCESS);
	}

	/* Child */
	if (fork() != 0) {
		/* Child */
		exit(EXIT_SUCCESS);
	}

	/* Grand child */
	setsid_ret = setsid();
	if (setsid_ret == ((pid_t) -1)) {
		return(1);
	}

	fd_in = open("/dev/null", O_RDONLY);
	fd_out = open("/dev/null", O_WRONLY);
	if (fd_in < 0 || fd_out < 0) {
		return(1);
	}

	dup2_ret = dup2(fd_in, STDIN_FILENO);
	if (dup2_ret != STDIN_FILENO) {
		return(1);
	}

	dup2_ret = dup2(fd_out, STDOUT_FILENO);
	if (dup2_ret != STDOUT_FILENO) {
		return(1);
	}

	dup2_ret = dup2(fd_out, STDERR_FILENO);
	if (dup2_ret != STDERR_FILENO) {
		return(1);
	}

	close(fd_in);
	close(fd_out);

	return(0);
}

/* Run process */
int main(int argc, char **argv) {
	struct option options[9];
	const char *bind_addr = BIND_ADDR, *newroot = NULL;
	uid_t user = 0;
	int port = PORT, thread_count = THREAD_COUNT;
	int cache_size = CACHE_SIZE;
	int init_ret, chroot_ret, setuid_ret, lookup_ret, chdir_ret;
	int setuid_enabled = 0, daemon_enabled = 0;
	int ch;
	int fd;

	/* Process arguments */
	filed_getopt_long_setopt(&options[0], "port", required_argument, 'p');
	filed_getopt_long_setopt(&options[1], "threads", required_argument, 't');
	filed_getopt_long_setopt(&options[2], "cache", required_argument, 'c');
	filed_getopt_long_setopt(&options[3], "bind", required_argument, 'b');
	filed_getopt_long_setopt(&options[4], "user", required_argument, 'u');
	filed_getopt_long_setopt(&options[5], "root", required_argument, 'r');
	filed_getopt_long_setopt(&options[6], "help", no_argument, 'h');
	filed_getopt_long_setopt(&options[7], "daemon", no_argument, 'd');
	filed_getopt_long_setopt(&options[8], NULL, 0, 0);
	while ((ch = getopt_long(argc, argv, "p:t:c:b:u:r:hd", options, NULL)) != -1) {
		switch(ch) {
			case 'p':
				port = atoi(optarg);
				break;
			case 't':
				thread_count = atoi(optarg);
				break;

					return(1);
				}
				break;
			case 'r':
				newroot = strdup(optarg);
				break;
			case 'd':
				daemon_enabled = 1;
				break;
			case '?':
			case ':':
				filed_print_help(stderr, 0, NULL);

				return(1);
			case 'h':
				filed_print_help(stdout, 1, NULL);

			perror("setuid");

			return(1);
		}
	}

	/* Become a daemon */
	if (daemon_enabled) {
		filed_daemonize();
	}

	/* Initialize */
	init_ret = filed_init(cache_size);
	if (init_ret != 0) {
		perror("filed_init");

		return(3);