This is a utility for the tortured 600 II N user who wants to
switch the scanner off after a program crash or if it gets not
correctly switched off upon program exit.
Could please somebody integrate this file into the source tree
(with a Makefile if you want, but it is for a somewhat exotic
scanner so only few feople will need it, and they probably will
be able to compile it on their own...) ?
Regards,
Andreas.
------------------------- cut here --------------------------
/*
off.c - Switch the Mustek 600 II N off
This utility accesses the I/O-ports directly and must therefore be
run with euid root, or must at least have access to /dev/port.
Compile with:
gcc -DHAVE_SYS_IO_H -O2 -Wall -s -o off off.c
The -O2 optimization is needed to allow inline functions !
Copyright (C) 1997-1999 Andreas Czechanowski, DL4SDC
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
andreas.czechanowski@ins.uni-stuttgart.de
*/
#define MUSTEK_CONF "/usr/local/etc/sane.d/mustek.conf"
#define PORT_DEV "/dev/port"
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#ifdef HAVE_SYS_IO_H
# include <sys/io.h> /* use where available (glibc 2.x, for example) */
#elif HAVE_ASM_IO_H
# include <asm/io.h> /* ugly, but backwards compatible */
#elif defined(__i386__) && defined (__GNUC__)
static __inline__ void
outb (u_char value, u_long port)
{
__asm__ __volatile__ ("outb %0,%1" : : "a" (value), "d" ((u_short) port));
}
static __inline__ u_char
inb (u_long port)
{
u_char value;
__asm__ __volatile__ ("inb %1,%0" : "=a" (value) : "d" ((u_short)port));
return value;
}
#endif
char *Mustek_Conf = MUSTEK_CONF;
int allowed_ports[] = {
0x26b, 0x26c,
0x2ab, 0x2ac,
0x2eb, 0x2ec,
0x22b, 0x22c,
0x32b, 0x32c,
0x36b, 0x36c,
0x3ab, 0x3ac,
0x3eb, 0x3ec,
-1
};
void
usage(void)
{
fprintf(stderr, "Usage: off [port]\n"
" switches the Mustek 600 II N off that is connected to\n"
" base address <port>. If address is not given, reads it\n"
" from SANE config file <%s>.\n", Mustek_Conf);
}
void
noaccess(int portaddr)
{
fprintf(stderr, "Access to port 0x%03x not allowed !\n", portaddr);
}
int
check_port(int portaddr)
{
int i, j;
for (i = 0; (j = allowed_ports[i]) != -1; i++) {
if (j == portaddr)
return j;
}
return -1;
}
int
str2int(char *ch)
{
int i;
i = strtol(ch, NULL, 0);
return i;
}
int
main(int argc, char **argv)
{
char *cp;
int portaddr = 0;
FILE *fp;
int pfd;
/* get config file name from environment if variable is set */
if (NULL != (cp = getenv("MUSTEK_CONF")))
{
Mustek_Conf = cp;
}
/* if port is explicitly given, try this one */
if (argc > 1)
{
portaddr = str2int(argv[1]);
}
/* else try to look it up from SANE's mustek.conf file */
else
if (NULL != (fp = fopen(MUSTEK_CONF, "r")))
{
char line[256];
while (NULL != fgets(line, 255, fp))
{
if ('#' == *line)
continue;
if (0 != (portaddr = str2int(line)))
break;
}
fclose(fp);
}
else
{
fprintf(stderr, "Mustek config file <%s> not found\n", Mustek_Conf);
usage();
exit(1);
}
if (check_port(portaddr) < 0 || check_port(portaddr + 1) < 0)
{
fprintf(stderr, "invalid port address specified !\n");
usage();
exit(1);
}
/* we need the control port, not the data port, so... */
portaddr++;
fprintf(stderr, "using control port address 0x%03x\n", portaddr);
/* try to get I/O permission from the kernel */
if (ioperm(portaddr, 1, 1) == 0)
{
outb(0x00, portaddr);
}
/* else try to open /dev/port to access the I/O port */
else
if ((pfd = open(PORT_DEV, O_RDWR, 0666)) >= 0)
{
char offcmd[] = { 0x00 };
if ((lseek(pfd, portaddr, SEEK_SET) != portaddr)
|| (write(pfd, offcmd, 1) != 1))
{
perror("error handling /dev/port");
exit(1);
}
close(pfd);
}
else
{
fprintf(stderr, "Could not get port access:\n"
"Neither via ioperm(), nor via /dev/port.\n"
"This program must be run setuid root,\n"
"or the user must have access to /dev/port.\n");
exit(1);
}
printf("successfully sent OFF-command to control port at 0x%03x.\n",
portaddr);
exit(0);
}
------------------------- cut here --------------------------
-- Dipl.-Ing. Andreas Czechanowski andreas.czechanowski@ins.uni-stuttgart.de Institut fuer Netzwerk- und Systemtheorie Universitaet Stuttgart
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