mirror of
https://github.com/troglobit/finit.git
synced 2026-10-01 05:22:48 +07:00
Joachim Wiberg
c22d123ab0
The bootmisc plugin sets up the base path for finit and figures out if the system has /run or /var/run -- needed by the other plugins. Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
138 lines
3.3 KiB
C
138 lines
3.3 KiB
C
/* User-defined condition event monitor for the Finit condition engine
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*
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* Copyright (c) 2021-2022 Joachim Wiberg <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 <fnmatch.h>
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#include <glob.h>
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#include <limits.h>
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#include <paths.h>
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#include "finit.h"
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#include "cond.h"
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#include "pid.h"
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#include "plugin.h"
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#include "iwatch.h"
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static struct iwatch iw_usr;
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static void usr_cond(char *name, uint32_t mask)
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{
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char cond[MAX_COND_LEN] = COND_USR;
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strlcat(cond, name, sizeof(cond));
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cond_update(cond);
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}
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static void usr_callback(void *arg, int fd, int events)
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{
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static char ev_buf[8 *(sizeof(struct inotify_event) + NAME_MAX + 1) + 1];
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struct inotify_event *ev;
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ssize_t sz;
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size_t off;
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sz = read(fd, ev_buf, sizeof(ev_buf) - 1);
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if (sz <= 0) {
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err(1, "invalid inotify event");
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return;
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}
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ev_buf[sz] = 0;
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for (off = 0; off < (size_t)sz; off += sizeof(*ev) + ev->len) {
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if (off + sizeof(*ev) > (size_t)sz)
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break;
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ev = (struct inotify_event *)&ev_buf[off];
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if (off + sizeof(*ev) + ev->len > (size_t)sz)
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break;
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dbg("name %s, event: 0x%08x", ev->name, ev->mask);
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if (!ev->mask)
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continue;
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if (ev->mask & IN_ISDIR)
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continue; /* unsupported */
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if (ev->mask & IN_DELETE)
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sync(); /* dont ask */
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usr_cond(ev->name, ev->mask);
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}
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}
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static void usr_init(void *arg)
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{
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char usrdir[MAX_ARG_LEN];
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char *path;
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mkpath(_PATH_COND, 0755);
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if (mkpath(pid_runpath(_PATH_CONDUSR, usrdir, sizeof(usrdir)), 0755) && errno != EEXIST) {
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err(1, "Failed creating %s condition directory, %s", COND_USR, _PATH_CONDUSR);
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return;
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}
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path = realpath(_PATH_CONDUSR, NULL);
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if (!path) {
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err(1, "Cannot figure out real path to %s, aborting", _PATH_CONDUSR);
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return;
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}
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if (iwatch_add(&iw_usr, path, IN_ONLYDIR))
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iwatch_exit(&iw_usr);
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free(path);
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}
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static plugin_t plugin = {
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.name = __FILE__,
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.hook[HOOK_BASEFS_UP] = { .cb = usr_init },
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.depends = { "bootmisc", },
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};
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PLUGIN_INIT(plugin_init)
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{
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int fd;
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fd = iwatch_init(&iw_usr);
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if (fd < 0)
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return;
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plugin.io.fd = fd;
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plugin.io.cb = usr_callback;
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plugin.io.flags = PLUGIN_IO_READ;
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plugin_register(&plugin);
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}
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PLUGIN_EXIT(plugin_exit)
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{
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plugin_unregister(&plugin);
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iwatch_exit(&iw_usr);
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}
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/**
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* Local Variables:
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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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