162 lines
5.3 KiB
C
162 lines
5.3 KiB
C
/*
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* general purpose mouse support for Linux
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*
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* *Startup and Daemon functions*
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*
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* Copyright (c) 2002 Nico Schottelius <nico-gpm@schottelius.org>
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*
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*
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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 of the License, or
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* (at your option) 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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#include <stdlib.h> /* atexit() */
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#include <string.h> /* strlen() */
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#include <errno.h> /* errno */
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#include <unistd.h> /* unlink,geteuid */
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#include <signal.h>
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#include <sys/types.h> /* geteuid, mknod */
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#include <sys/stat.h> /* mknod */
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#include <fcntl.h> /* mknod */
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#include <unistd.h> /* mknod */
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#include "headers/gpmInt.h"
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#include "headers/message.h"
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#include "headers/console.h"
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#include "headers/selection.h"
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/* what todo atexit */
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static void gpm_exited(void)
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{
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gpm_report(GPM_PR_DEBUG, GPM_MESS_REMOVE_FILES, GPM_NODE_PID, GPM_NODE_CTL);
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unlink(GPM_NODE_PID);
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unlink(GPM_NODE_CTL);
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}
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void startup(int argc, char **argv)
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{
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extern struct options option;
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extern int errno;
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/* basic settings */
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option.run_status = GPM_RUN_STARTUP; /* 10,9,8,... let's go */
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option.autodetect = 0; /* no mouse autodection */
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option.progname = argv[0]; /* who we are */
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get_console_name();
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cmdline(argc, argv); /* parse command line */
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if (geteuid() != 0) gpm_report(GPM_PR_OOPS,GPM_MESS_ROOT); /* root or exit */
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/* Planned for gpm-1.30, but only with devfs */
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/* if(option.autodetect) autodetect(); */
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/****************** OLD CODE from gpn.c ***********************/
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openlog(option.progname, LOG_PID,
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option.run_status != GPM_RUN_DEBUG ? LOG_DAEMON : LOG_USER);
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console_load_lut();
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if (repeater.raw || repeater.type) {
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if (mkfifo(GPM_NODE_FIFO, 0666) && errno != EEXIST)
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gpm_report(GPM_PR_OOPS, GPM_MESS_CREATE_FIFO, GPM_NODE_FIFO);
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if ((repeater.fd = open(GPM_NODE_FIFO, O_RDWR|O_NONBLOCK)) < 0)
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gpm_report(GPM_PR_OOPS, GPM_MESS_OPEN, GPM_NODE_FIFO);
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}
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if(option.run_status == GPM_RUN_FORK) { /* else is debugging */
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/* goto background and become a session leader (Stefan Giessler) */
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switch(fork()) {
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case -1: gpm_report(GPM_PR_OOPS,GPM_MESS_FORK_FAILED); /* error */
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// case 0: option.run_status = GPM_RUN_DAEMON; break; /* child */
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default: _exit(0); /* parent */
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}
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if (setsid() < 0) gpm_report(GPM_PR_OOPS,GPM_MESS_SETSID_FAILED);
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}
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/* now we are a daemon */
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option.run_status = GPM_RUN_DAEMON;
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/* damon init: check whether we run or not, display message */
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check_uniqueness();
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gpm_report(GPM_PR_INFO,GPM_MESS_STARTED);
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/* is changing to root needed, because of relative paths ? or can we just
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* remove and ignore it ?? FIXME */
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if (chdir("/") < 0) gpm_report(GPM_PR_OOPS,GPM_MESS_CHDIR_FAILED);
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atexit(gpm_exited); /* call gpm_exited at the end */
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}
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/* itz Sat Sep 12 10:30:05 PDT 1998 this function used to mix two
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completely different things; opening a socket to a running daemon
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and checking that a running daemon existed. Ugly. */
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/* rewritten mostly on 20th of February 2002 - nico */
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void check_uniqueness(void)
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{
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FILE *fp = 0;
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int old_pid = -1;
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if ((fp = fopen(GPM_NODE_PID, "r")) != NULL) {
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fscanf(fp, "%d", &old_pid);
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if (kill(old_pid, 0) == -1) {
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gpm_report(GPM_PR_INFO,GPM_MESS_STALE_PID, GPM_NODE_PID);
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unlink(GPM_NODE_PID);
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} else /* we are really running, exit asap! */
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gpm_report(GPM_PR_OOPS, GPM_MESS_ALREADY_RUN, old_pid);
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}
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/* now try to sign ourself */
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if ((fp = fopen(GPM_NODE_PID,"w")) != NULL) {
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fprintf(fp,"%d\n",getpid());
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fclose(fp);
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} else {
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gpm_report(GPM_PR_OOPS,GPM_MESS_NOTWRITE,GPM_NODE_PID);
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}
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}
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/* itz Sat Sep 12 10:55:51 PDT 1998 Added this as replacement for the
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unwanted functionality in check_uniqueness. */
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void kill_gpm(void)
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{
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int old_pid;
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FILE* fp = fopen(GPM_NODE_PID, "r");
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/* if we cannot find the old pid file, leave */
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if (fp == NULL) gpm_report(GPM_PR_OOPS,GPM_MESS_OPEN, GPM_NODE_PID);
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/* else read the pid */
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if (fscanf(fp, "%d", &old_pid) != 1)
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gpm_report(GPM_PR_OOPS, GPM_MESS_READ_PROB, GPM_NODE_PID);
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fclose(fp);
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gpm_report(GPM_PR_DEBUG, GPM_MESS_KILLING, old_pid);
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/* first check if we run */
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if (kill(old_pid,0) == -1) {
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gpm_report(GPM_PR_INFO, GPM_MESS_STALE_PID, GPM_NODE_PID);
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unlink(GPM_NODE_PID);
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}
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/* then kill us (not directly, but the other instance ... ) */
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if (kill(old_pid, SIGTERM) == -1)
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gpm_report(GPM_PR_OOPS, GPM_MESS_CANT_KILL, old_pid);
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gpm_report(GPM_PR_INFO, GPM_MESS_KILLED, old_pid);
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exit(0);
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}
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