mirror of
https://github.com/troglobit/finit.git
synced 2026-10-01 05:22:48 +07:00
Joachim Nilsson
fbfffbc9a4
Tried to solve the signal.h name clash by using #include_next, but seeing as this is not recommended[1] and breaks builds on some cross compilers, the files were simply renamed: signal.[ch] --> sig.[ch] [1] - http://gcc.gnu.org/onlinedocs/cpp/Wrapper-Headers.html Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/* Optional /dev/initctl FIFO monitor
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*
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* Copyright (c) 2008-2010 Claudio Matsuoka <cmatsuoka@gmail.com>
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* Copyright (c) 2008-2012 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 <errno.h>
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#include <signal.h>
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#include <string.h>
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#include "finit.h"
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#include "plugin.h"
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#define INIT_MAGIC 0x03091969
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#define INIT_CMD_RUNLVL 1
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struct init_request {
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int magic; /* Magic number */
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int cmd; /* What kind of request */
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int runlevel; /* Runlevel to change to */
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int sleeptime; /* Time between TERM and KILL */
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char data[368];
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};
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#ifdef LISTEN_INITCTL
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/* Standard reboot/shutdown utilities talk to init using /dev/initctl.
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* We should check if the fifo was recreated and reopen it.
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*/
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static void read_initctl(void *UNUSED(arg), int fd, int UNUSED(events))
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{
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struct init_request request;
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_d("Receiving request on %s...", FINIT_FIFO);
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while (1) {
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ssize_t len = read(fd, &request, sizeof(request));
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if (-1 == len) {
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_d("Error %d", errno);
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break; /* Probably EAGAIN */
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}
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if (request.magic != INIT_MAGIC)
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continue;
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_d("Magic OK...");
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if (request.cmd == INIT_CMD_RUNLVL) {
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switch (request.runlevel) {
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case '0':
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_d("Halting system (SIGUSR2)");
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do_shutdown(SIGUSR2);
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break;
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case '6':
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_d("Rebooting system (SIGUSR1)");
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do_shutdown(SIGUSR1);
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break;
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default:
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_d("Unsupported runlevel: %d", request.runlevel);
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break;
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}
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} else {
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_d("Unsupported cmd: %d", request.cmd);
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}
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}
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}
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static plugin_t plugin = {
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.io = {
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.cb = read_initctl,
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.flags = PLUGIN_IO_READ,
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},
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};
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PLUGIN_INIT(plugin_init)
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{
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_d("Setting up %s", FINIT_FIFO);
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mkfifo(FINIT_FIFO, 0600);
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plugin.io.fd = open(FINIT_FIFO, O_RDONLY | O_NONBLOCK);
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if (-1 == plugin.io.fd) {
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_e("Failed opening %s FIFO, error %d: %s", FINIT_FIFO, errno, strerror(errno));
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return;
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}
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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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}
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#endif /* LISTEN_INITCTL */
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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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