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/**
* \file mtp-probe.c
* Program to probe newly connected device interfaces from
* userspace to determine if they are MTP devices, used for
* udev rules.
*
* Invoke the program from udev to check it for MTP signatures,
* e.g.
* ATTR{bDeviceClass}=="ff",
* PROGRAM="<path>/mtp-probe /sys$env{DEVPATH} $attr{busnum} $attr{devnum}",
* RESULT=="1", ENV{ID_MTP_DEVICE}="1", ENV{ID_MEDIA_PLAYER}="1",
* SYMLINK+="libmtp-%k", MODE="666"
*
* Is you issue this before testing your /var/log/messages
* will be more verbose:
*
* udevadm control --log-priority=debug
*
* Exits with status code 1 if the device is an MTP device,
* else exits with 0.
*
* Copyright (C) 2011-2012 Linus Walleij <triad@df.lth.se>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __linux__
#error "This program should only be compiled for Linux!"
#endif
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <syslog.h>
#include <libmtp.h>
int main (int argc, char **argv)
{
char *fname;
int busno;
int devno;
int ret;
if (argc < 4) {
syslog(LOG_INFO, "need device path, busnumber, device number as argument\n");
printf("0");
exit(0);
}
fname = argv[1];
busno = atoi(argv[2]);
devno = atoi(argv[3]);
syslog(LOG_INFO, "checking bus %d, device %d: \"%s\"\n", busno, devno, fname);
ret = LIBMTP_Check_Specific_Device(busno, devno);
if (ret) {
syslog(LOG_INFO, "bus: %d, device: %d was an MTP device\n", busno, devno);
printf("1");
} else {
syslog(LOG_INFO, "bus: %d, device: %d was not an MTP device\n", busno, devno);
printf("0");
}
exit(0);
}
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