mirror of
https://github.com/troglobit/finit.git
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138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/* Classic inetd services launcher for Finit
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*
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* Copyright (c) 2015 Joachim Nilsson <troglobit@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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//#include <unistd.h>
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//#include <sys/types.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include "finit.h"
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#include "svc.h"
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#include "helpers.h"
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#include "libuev/uev.h"
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/* Socket callback, looks up correct svc and starts it as an inetd service */
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static void socket_cb(uev_ctx_t *UNUSED(ctx), uev_t *w, void *arg, int UNUSED(events))
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{
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svc_t *svc = (svc_t *)arg;
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if (SVC_START != svc_enabled(svc, 1, NULL))
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return;
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if (!svc->forking)
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uev_io_stop(w);
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svc_start(svc);
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}
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/* Launch Inet socket for service.
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* TODO: Add filtering ALLOW/DENY per interface.
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*/
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static void spawn_socket(uev_ctx_t *ctx, svc_t *svc)
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{
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int sd;
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socklen_t len = sizeof(struct sockaddr);
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struct sockaddr_in s;
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if (!svc->sock_type) {
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FLOG_ERROR("Skipping invalid inetd service %s", svc->cmd);
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return;
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}
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sd = socket(AF_INET, svc->sock_type | SOCK_NONBLOCK, svc->proto);
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if (-1 == sd) {
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FLOG_PERROR("Failed opening inetd socket type %d proto %d", svc->sock_type, svc->proto);
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return;
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}
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memset(&s, 0, sizeof(s));
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s.sin_family = AF_INET;
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s.sin_addr.s_addr = INADDR_ANY;
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s.sin_port = htons(svc->port);
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if (bind(sd, (struct sockaddr *)&s, len) < 0) {
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FLOG_PERROR("Failed binding to port %d, maybe another %s server is already running",
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svc->port, svc->service);
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close(sd);
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return;
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}
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if (svc->port && svc->sock_type != SOCK_DGRAM) {
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if (-1 == listen(sd, 20)) {
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FLOG_PERROR("Failed listening to inetd service %s", svc->service);
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close(sd);
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return;
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}
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}
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_d("Initializing inetd %s service %s type %d proto %d on socket %d ...",
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svc->service, basename(svc->cmd), svc->sock_type, svc->proto, sd);
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uev_io_init(ctx, &svc->watcher, socket_cb, svc, sd, UEV_READ);
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}
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/* Inetd monitor, called by svc_monitor() */
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int inetd_respawn(pid_t pid)
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{
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svc_t *svc;
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for (svc = svc_iterator(1); svc; svc = svc_iterator(0)) {
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if (SVC_CMD_INETD != svc->type)
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continue;
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if (svc->pid == pid) {
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svc->pid = 0;
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if (!svc->forking)
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uev_io_set(&svc->watcher, svc->watcher.fd, UEV_READ);
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return 1; /* It was us! */
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}
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}
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return 0; /* Not an inetd service */
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}
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/* Called when changing runlevel to start Inet socket handlers */
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void inetd_runlevel(uev_ctx_t *ctx, int runlevel)
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{
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svc_t *svc;
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for (svc = svc_iterator(1); svc; svc = svc_iterator(0)) {
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if (SVC_CMD_INETD != svc->type)
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continue;
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if (!ISSET(svc->runlevels, runlevel))
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continue;
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spawn_socket(ctx, svc);
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}
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}
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/**
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* Local Variables:
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* version-control: t
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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