292 lines
10 KiB
C
292 lines
10 KiB
C
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/*
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* gpn.c - support functions for gpm-Linux
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*
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* Copyright (C) 1993 Andreq Haylett <ajh@gec-mrc.co.uk>
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* Copyright (C) 1994-1999 Alessandro Rubini <rubini@linux.it>
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* Copyright (C) 1998 Ian Zimmerman <itz@rahul.net>
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* Copyright (c) 2001 Nico Schottelius <nico@schottelius.org>
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*
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* Tue, 5 Jan 1999 23:26:10 +0000, modified by James Troup <james@nocrew.org>
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* (usage): typo (s/an unexistent/a non-existent/)
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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 <stdio.h>
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#include <stdlib.h>
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#include <string.h> /* strerror(); ?!? memcpy() */
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#include <ctype.h> /* isdigit */
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#include <signal.h>
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#include <stdarg.h> /* Log uses it */
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#include <errno.h>
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#include <unistd.h> /* getopt(),symlink() */
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#include <sys/stat.h> /* mkdir() */
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#include <sys/param.h>
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#include <sys/time.h> /* timeval */
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#include <sys/wait.h> /* wait() */
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#include <sys/types.h> /* socket() */
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#include <sys/socket.h> /* socket() */
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#include <sys/un.h> /* struct sockaddr_un */
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#include <asm/types.h> /* __u32 */
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#ifdef SIGTSTP /* true if BSD system */
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#include <sys/file.h>
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#include <sys/ioctl.h>
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#endif
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#ifndef HAVE___U32
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# ifndef _I386_TYPES_H /* /usr/include/asm/types.h */
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typedef unsigned int __u32;
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# endif
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#endif
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#include "headers/message.h"
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#include "headers/gpmInt.h"
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#include "headers/gpm.h"
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#include "headers/daemon.h"
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extern int errno;
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/*===================================================================*/
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/* octal digit */
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static int isodigit(const unsigned char c)
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{
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return ((c & ~7) == '0');
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}
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/* routine to convert digits from octal notation (Andries Brouwer) */
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static int getsym(const unsigned char *p0, unsigned char *res)
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{
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const unsigned char *p = p0;
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char c;
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c = *p++;
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if (c == '\\' && *p) {
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c = *p++;
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if (isodigit(c)) {
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c -= '0';
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if (isodigit(*p)) c = 8*c + (*p++ - '0');
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if (isodigit(*p)) c = 8*c + (*p++ - '0');
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}
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}
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*res = c;
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return (p - p0);
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}
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/* description missing! FIXME */
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int loadlut(char *charset)
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{
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int i, c, fd;
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unsigned char this, next;
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static __u32 long_array[9]={
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0x05050505, /* ugly, but preserves alignment */
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0x00000000, /* control chars */
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0x00000000, /* digits */
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0x00000000, /* uppercase and '_' */
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0x00000000, /* lowercase */
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0x00000000, /* Latin-1 control */
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0x00000000, /* Latin-1 misc */
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0x00000000, /* Latin-1 uppercase */
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0x00000000 /* Latin-1 lowercase */
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};
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#define inwordLut (long_array+1)
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for (i=0; charset[i]; ) {
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i += getsym(charset+i, &this);
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if (charset[i] == '-' && charset[i + 1] != '\0')
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i += getsym(charset+i+1, &next) + 1;
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else
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next = this;
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for (c = this; c <= next; c++)
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inwordLut[c>>5] |= 1 << (c&0x1F);
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}
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if ((fd=open(option.consolename, O_WRONLY)) < 0) {
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/* try /dev/console, if /dev/tty0 failed -- is that really senseful ??? */
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free(option.consolename); /* allocated by main */
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if((option.consolename=malloc(strlen(GPM_SYS_CONSOLE)+1)) == NULL)
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gpm_report(GPM_PR_OOPS,GPM_MESS_NO_MEM);
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strcpy(option.consolename,GPM_SYS_CONSOLE);
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if ((fd=open(option.consolename, O_WRONLY)) < 0) gpm_report(GPM_PR_OOPS,GPM_MESS_OPEN_CON);
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}
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if (ioctl(fd, TIOCLINUX, &long_array) < 0) { /* fd <0 is checked */
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if (errno==EPERM && getuid())
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gpm_report(GPM_PR_WARN,GPM_MESS_ROOT); /* why do we still continue?*/
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else if (errno==EINVAL)
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gpm_report(GPM_PR_OOPS,GPM_MESS_CSELECT);
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}
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close(fd);
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return 0;
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}
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/* usage: display for usage informations */
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int usage(char *whofailed)
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{
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if (whofailed) {
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gpm_report(GPM_PR_ERR,GPM_MESS_SPEC_ERR,whofailed,option.progname);
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return 1;
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}
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printf(GPM_MESS_USAGE,option.progname, DEF_ACCEL, DEF_BAUD, DEF_SEQUENCE,
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DEF_DELTA, DEF_TIME, DEF_LUT,DEF_SCALE, DEF_SAMPLE, DEF_TYPE);
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return 1;
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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 check_kill(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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/* 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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/*****************************************************************************
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* the function returns a valid type pointer or NULL if not found
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*****************************************************************************/
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struct Gpm_Type *find_mouse_by_name(char *name)
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{
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Gpm_Type *type;
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char *s;
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int len = strlen(name);
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for (type=mice; type->fun; type++) {
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if (!strcasecmp(name, type->name)) break;
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/* otherwise, look in the synonym list */
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for (s = type->synonyms; s; s = strchr(s, ' ')) {
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while (*s && isspace(*s)) s++; /* skip spaces */
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if(!strncasecmp(name, s, len) && !isprint(*(s + len))) break;/*found*/
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}
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if(s) break; /* found a synonym */
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}
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if (!type->fun) return NULL;
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return type;
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}
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/*****************************************************************************
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* Check the command line and / or set the appropriate variables
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* Can't believe it, today cmdline() really does what the name tries to say
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*****************************************************************************/
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void cmdline(int argc, char **argv)
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{
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extern struct options option;
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char options[]="a:A::b:B:d:Dg:hi:kl:m:Mo:pr:R::s:S:t:TuvV::23";
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int opt;
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/* initialize for the dual mouse */
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mouse_table[2]=mouse_table[1]=mouse_table[0]; /* copy defaults */
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which_mouse=mouse_table+1; /* use the first */
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while ((opt = getopt(argc, argv, options)) != -1) {
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switch (opt) {
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case 'a': opt_accel = atoi(optarg); break;
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case 'A': opt_aged++;
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if (optarg)
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opt_age_limit = atoi(optarg); break;
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case 'b': opt_baud = atoi(optarg); break;
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case 'B': opt_sequence = optarg; break;
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case 'd': opt_delta = atoi(optarg); break;
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case 'D': option.run_status = GPM_RUN_DEBUG; break;
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case 'g': opt_glidepoint_tap=atoi(optarg); break;
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case 'h': exit(usage(NULL));
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case 'i': opt_time=atoi(optarg); break;
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case 'k': check_kill(); break;
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case 'l': opt_lut = optarg; break;
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case 'm': add_mouse(GPM_ADD_DEVICE,optarg);
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opt_dev = optarg; break; /* GO AWAY!*/
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case 'M': opt_double++; option.repeater++;
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if (option.repeater_type == 0)
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option.repeater_type = "msc";
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which_mouse=mouse_table+2; break;
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case 'o': add_mouse(GPM_ADD_OPTIONS,optarg);
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gpm_report(GPM_PR_DEBUG,"options: %s",optarg);
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opt_options = optarg; break; /* GO AWAY */
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case 'p': opt_ptrdrag = 0; break;
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case 'r':
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/* being called responsiveness, I must take the inverse */
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opt_scale=atoi(optarg);
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if(!opt_scale || opt_scale > 100) opt_scale=100; /* the maximum */
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else opt_scale=100/opt_scale; break;
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case 'R':
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option.repeater++;
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if (optarg) option.repeater_type = optarg;
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else option.repeater_type = "msc"; break;
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case 's': opt_sample = atoi(optarg); break;
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case 'S': if (optarg) opt_special = optarg;
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else opt_special=""; break;
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case 't': add_mouse(GPM_ADD_TYPE,optarg);
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opt_type = optarg; break; /* GO AWAY */
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case 'u': option.autodetect = 1; break;
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case 'T': opt_test++; break;
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case 'v': printf(GPM_MESS_VERSION "\n"); exit(0);
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case '2': opt_three = -1; break;
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case '3': opt_three = 1; break;
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default: exit(usage("commandline"));
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}
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}
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}
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