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- Committer: Bazaar Package Importer
- Author(s): Thom May
- Date: 2005-04-01 11:39:55 UTC
- Revision ID: james.westby@ubuntu.com-20050401113955-nnsv7bovk07obxa9
Tags: upstream-0.3
Import upstream version 0.3
- files added:
- etc
- src
added
removed
src/fnfxd_init.c
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/*
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* Author: Timo Hoenig <thoenig@nouse.net>
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* Copyright (c) 2003, 2004 Timo Hoenig <thoenig@nouse.net>
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* All rights reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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/*
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* Defines
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*
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*/
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/*
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* Includes
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*
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*/
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include "fnfx.h"
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/*
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* Declarations
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*
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*/
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void sigterm_handler(int signal);
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int check_pid(void);
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int init_sig_handler(void);
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int init_fnfxd(int *, int *);
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int init_shmem(t_daemon_cfg *);
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int cp_cfg(t_daemon_cfg *);
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int set_flags(int *, int *);
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int init_pid(void);
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int init_acpi(void);
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int init_sem(void);
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/*
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* External functions
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*
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*/
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extern void debug(const char *, ...);
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extern void fatal(const char *, ...);
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extern int init_config(void);
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extern t_daemon_cfg *cfg;
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/*
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* Globals
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*
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*/
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/*
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* Functions
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*
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*/
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/*
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* sigterm_handler()
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*
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* Signal handler for terminating signals.
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*
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* - Remove pid file
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* - Free shared memory
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*/
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void sigterm_handler(int signal)
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{
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debug("Received signal %d. Terminating.", signal);
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/* destory shared memory */
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shmctl(cfg->shmem.id, IPC_RMID, cfg->shmem.addr);
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/* remove semaphore */
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semctl(cfg->sem.id, 0, IPC_RMID);
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/* remove pid file */
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unlink(PIDFILE);
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exit(255);
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}
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/*
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* init_sig_handler()
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*
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* Register the signal handler for terminating signals.a
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*
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*/
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int init_sig_handler()
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{
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signal(SIGTERM, sigterm_handler);
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signal(SIGKILL, sigterm_handler);
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signal(SIGQUIT, sigterm_handler);
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signal(SIGINT, sigterm_handler);
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return 0;
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}
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/*
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* check_pid()
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*
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* Check if another instance of fnfxd is running.
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*
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*/
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int check_pid()
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{
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FILE *f;
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pid_t pid, read_pid;
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pid = (unsigned int) getpid();
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read_pid = 0;
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f = fopen(PIDFILE, "r+");
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if (f) {
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fscanf(f, "%i", &read_pid);
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fatal
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("According to %s, another instance of `fnfxd` is already running (PID = %i).\n"
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"If this is not the case, please remove %s.", PIDFILE, read_pid,
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PIDFILE);
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fclose(f);
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return 1;
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}
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return 0;
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}
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/*
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* init_shmem()
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*
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* - Initialize shared memory segment
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* - Attach shared memory segment
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*
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*/
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int init_shmem(t_daemon_cfg * config)
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{
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key_t shmkey = (int) SHMKEY;
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config->shmem.key = shmkey;
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config->shmem.id =
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shmget(config->shmem.key, (int) SHMSIZE, IPC_CREAT | 0666);
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if (config->shmem.id < 0) {
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fatal("Failed to create shared memory segment.");
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return 1;
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}
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if ((config->shmem.addr = shmat(config->shmem.id, NULL, 0)) == (char *) -1) {
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fatal("Error while attaching shared memory segment.");
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return 1;
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}
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return 0;
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}
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/*
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* cp_cfg()
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*
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* - Copy configuration to shared memory segment
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* - Let the global t_daemon_cfg *cfg point to it
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*
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*/
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int cp_cfg(t_daemon_cfg * config)
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{
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memcpy((config->shmem.addr + DCFG_OFFSET), (void *) config,
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sizeof(*config));
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cfg = config->shmem.addr + DCFG_OFFSET;
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return 0;
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}
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/*
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* set_flags()
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*
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* Set the command line flags in the configuration (in memory).
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*
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*/
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int set_flags(int *debug_flag, int *nodetach_flag)
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{
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cfg->debug_flag = *debug_flag;
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cfg->nodetach_flag = *nodetach_flag;
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return 0;
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}
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/*
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* init_pid()
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*
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* Check for other instances of fnfxd and register PID file.
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*
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*/
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int init_pid()
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{
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FILE *f;
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cfg->pid = getpid();
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f = fopen(PIDFILE, "w");
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if (f) {
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fprintf(f, "%u\n", cfg->pid);
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fclose(f);
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}
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else {
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fatal("Could not access pid file %s.", PIDFILE);
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return 1;
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}
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return 0;
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}
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/*
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* init_acpi()
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*
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* - Check if /proc/acpi/toshiba and subkeys are available
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*
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*/
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int init_acpi()
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{
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FILE *f;
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int i;
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const char *acpi_proc_keys[9] = {
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ACPI_TOSHIBA,
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ACPI_FAN,
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ACPI_KEYS,
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ACPI_LCD,
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ACPI_VERSION,
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ACPI_VIDEO,
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ACPI_SLEEP,
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ACPI_CPU,
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ACPI_BLUETOOTH
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};
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for (i = 1; i < 7; i++) {
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if ((f = fopen(acpi_proc_keys[i], "r+"))) {
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cfg->acpi.config |= 1 << i;
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fclose(f);
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}
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else if ((i == 2) || (i == 3)) {
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fatal("Could open %s.", acpi_proc_keys[i]);
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fprintf(stderr,
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"Please make sure that your kernel has enabled the Toshiba option in the ACPI section.\n"
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"For more information read the documentation and/or http://fnfx.sf.net/index.php?section=doc#kernel.\n\n");
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return 1;
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}
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}
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cfg->acpi.config |= 1 << 0;
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return 0;
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}
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/*
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* init_sem()
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*
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* Initialize semaphores.
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*
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*/
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int init_sem()
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{
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cfg->sem.key = SEMKEY;
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cfg->sem.id = semget(cfg->sem.key, 3, IPC_CREAT | 0666);
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if (cfg->sem.id < 0) {
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fatal("Could not create semaphore with key 0x%i.", cfg->sem.key);
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return 1;
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}
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if (semctl(cfg->sem.id, 0, SETVAL, 0)) {
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fatal("Could not initialize semaphore %i (id = %i) with 0.", 0,
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cfg->sem.id);
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return 1;
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}
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if (semctl(cfg->sem.id, 1, SETVAL, 0)) {
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fatal("Could not initialize semaphore %i (id = %i) with 0.", 1,
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cfg->sem.id);
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return 1;
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}
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if (semctl(cfg->sem.id, 2, SETVAL, 0)) {
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fatal("Could not initialize semaphore %i (id = %i) with 0.", 2,
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cfg->sem.id);
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return 1;
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}
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return 0;
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}
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/*
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* init_fnfxd()
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*
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* Call initialization routines.
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*
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*/
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int init_fnfxd(int *debug_flag, int *nodetach_flag)
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{
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t_daemon_cfg config;
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if (check_pid())
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return 1;
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if (init_shmem(&config))
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return 1;
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if (cp_cfg(&config))
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return 1;
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if (set_flags(debug_flag, nodetach_flag))
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return 1;
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if (init_acpi())
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return 1;
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if (init_config())
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return 1;
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if (init_sem())
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return 1;
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return 0;
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}
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