Please modify libgphoto2 instructions in the Wiki as described below.
0) Install libgphoto2 as usual
1) After installation, create the "camera" group:
groupadd camera
2) Compile the attached C program (origin: Debian):
gcc -I/usr/include/gphoto2 -o print-udev-rules -lgphoto2 print-udev-rules.c
3) Run it in order to generate and install udev rules:
packaging/linux-hotplug/print-usb-usermap | ./print-udev-rules \
>/etc/udev/rules.d/31-libgphoto2.rules
Result: all raw USB nodes for all known cameras are owned by the "camera" group.
--
Alexander E. Patrakov
/* $Id$
*
* Copyright © 2002 Hans Ulrich Niedermann <[EMAIL PROTECTED]>
* Portions Copyright © 2002 Lutz Müller <[EMAIL PROTECTED]>
* Portions Copyright © 2002 FIXME
* Portions Copyright © 2005 Julien BLACHE <[EMAIL PROTECTED]>
*
* This program 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.
*/
#define GP_USB_HOTPLUG_SCRIPT "/etc/hotplug/usb/usbcam"
#define GP_CAMERA_GROUP "camera"
#define HELP_TEXT \
"print-udev-rules - print rules file for udev\n" \
"\n" \
"Syntax:\n" \
" print-udev-rules [ --verbose ] [ --debug ] [ <scriptname> ]\n" \
"\n" \
" --verbose also print comments with camera model names\n" \
" --debug print all debug output\n" \
"\n" \
"print-udev-rules prints the lines for the rules file on stdout.\n" \
"All other messages are printed on stderr. In case of any error, the \n" \
"program aborts regardless of data printed on stdout and returns a non-zero\n" \
"status code.\n" \
"If no <scriptname> is given, print-udev-rules uses the script name\n" \
"\"" GP_USB_HOTPLUG_SCRIPT "\"."
#include <stdio.h>
#include <sys/time.h>
#include <time.h>
#include <string.h>
#include <gphoto2-camera.h>
#include <gphoto2-port-log.h>
#ifndef TRUE
#define TRUE (0==0)
#endif
#ifndef FALSE
#define FALSE (0!=0)
#endif
#define GP_USB_HOTPLUG_MATCH_VENDOR_ID 0x0001
#define GP_USB_HOTPLUG_MATCH_PRODUCT_ID 0x0002
#define GP_USB_HOTPLUG_MATCH_DEV_CLASS 0x0080
#define GP_USB_HOTPLUG_MATCH_DEV_SUBCLASS 0x0100
#define GP_USB_HOTPLUG_MATCH_DEV_PROTOCOL 0x0200
#ifdef __GNUC__
#define CR(result) \
do { \
int r = (result); \
if (r < 0) { \
fprintf(stderr, "print-usb-usermap: " \
"Fatal error running `%s'.\n" \
"Aborting.\n", #result ); \
return (r); \
} \
} while (0)
#else /* !__GNUC__ */
#define CR(result) \
do { \
int r = (result); \
if (r < 0) { \
fprintf(stderr, "print-usb-usermap: " \
"Fatal error detected, aborting.\n"); \
return (r); \
} \
} while (0)
#endif /* __GNUC__ */
/* print-udev-rules
*
* Print out lines that can be included into an udev rules file
* - for all cams supported by our instance of libgphoto2.
*
* written after list_cameras & print_usb_usermap
*/
static int print_udev_rules (const char *hotplug_script, const int add_comments)
{
int x, n;
CameraAbilitiesList *al;
CameraAbilities a;
CR (gp_abilities_list_new (&al));
CR (gp_abilities_list_load (al, NULL)); /* use NULL context */
CR (n = gp_abilities_list_count (al));
printf ("# udev rules file for libgphoto2\n#\n");
printf ("ACTION!=\"add\", GOTO=\"libgphoto2_rules_end\"\n\n");
for (x = 0; x < n; x++) {
int flags = 0;
int class = 0, subclass = 0, proto = 0;
int usb_vendor = 0, usb_product = 0;
CR (gp_abilities_list_get_abilities (al, x, &a));
if (!(a.port & GP_PORT_USB))
continue;
if (a.usb_vendor) { /* usb product id may be 0! */
class = 0;
subclass = 0;
proto = 0;
flags = GP_USB_HOTPLUG_MATCH_VENDOR_ID | GP_USB_HOTPLUG_MATCH_PRODUCT_ID;
usb_vendor = a.usb_vendor;
usb_product = a.usb_product;
} else if (a.usb_class) {
class = a.usb_class;
subclass = a.usb_subclass;
proto = a.usb_protocol;
flags = GP_USB_HOTPLUG_MATCH_DEV_CLASS;
if (subclass != -1)
flags |= GP_USB_HOTPLUG_MATCH_DEV_SUBCLASS;
else
subclass = 0;
if (proto != -1)
flags |= GP_USB_HOTPLUG_MATCH_DEV_PROTOCOL;
else
proto = 0;
usb_vendor = 0;
usb_product = 0;
} else {
flags = 0;
}
if (flags != 0) {
printf ("# %s\n",
a.model);
if (flags & GP_USB_HOTPLUG_MATCH_DEV_CLASS) {
printf("SYSFS{bDeviceClass}==\"%02x\", ", class);
if (flags & GP_USB_HOTPLUG_MATCH_DEV_SUBCLASS) {
printf("SYSFS{bDeviceSubClass}==\"%02x\", ", subclass);
}
if (flags & GP_USB_HOTPLUG_MATCH_DEV_PROTOCOL) {
printf("SYSFS{bDeviceProtocol}==\"%02x\", ", proto);
}
} else {
printf ("SYSFS{idVendor}==\"%04x\", SYSFS{idProduct}==\"%04x\", ",
a.usb_vendor, a.usb_product);
}
printf("MODE=\"0660\", GROUP=\"%s\"\n", GP_CAMERA_GROUP);
} else {
fputs ("Error: Neither vendor/product nor class/subclass matched\n", stderr);
return 2;
}
}
printf ("\nLABEL=\"libgphoto2_rules_end\"\n");
CR (gp_abilities_list_free (al));
return (0);
}
/* time zero for debug log time stamps */
struct timeval glob_tv_zero = { 0, 0 };
static void
debug_func (GPLogLevel level, const char *domain, const char *format,
va_list args, void *data)
{
struct timeval tv;
gettimeofday (&tv,NULL);
fprintf (stderr, "%li.%06li %s(%i): ",
tv.tv_sec - glob_tv_zero.tv_sec,
(1000000 + tv.tv_usec - glob_tv_zero.tv_usec) % 1000000,
domain, level);
vfprintf (stderr, format, args);
fprintf (stderr, "\n");
}
int main(int argc, char *argv[])
{
char *hotplug_script = NULL; /* script name to use */
int add_comments = FALSE; /* whether to add cam model as a comment */
int debug_mode = FALSE; /* whether we should output debug messages */
int i;
/* check command line arguments */
for (i=1; i<argc; i++) {
if (0 == strcmp(argv[i], "--verbose")) {
if (add_comments) {
fprintf(stderr, "Error: duplicate parameter: option \"%s\"\n", argv[i]);
return 1;
}
add_comments = TRUE;
} else if (0 == strcmp(argv[i], "--debug")) {
if (debug_mode) {
fprintf(stderr, "Error: duplicate parameter: option \"%s\"\n", argv[i]);
return 1;
}
debug_mode = TRUE;
/* now is time zero for debug log time stamps */
gettimeofday (&glob_tv_zero, NULL);
gp_log_add_func (GP_LOG_ALL, debug_func, NULL);
} else if (0 == strcmp(argv[i], "--help")) {
puts(HELP_TEXT);
return 0;
} else {
if (hotplug_script != NULL) {
fprintf(stderr, "Error: duplicate script parameter: \"%s\"\n", argv[i]);
return 1;
}
/* assume script name */
hotplug_script = argv[i];
}
}
if (NULL == hotplug_script) {
hotplug_script = GP_USB_HOTPLUG_SCRIPT;
}
return print_udev_rules(hotplug_script, add_comments);
}
/*
* Local Variables:
* c-file-style:"linux"
* indent-tabs-mode:t
* End:
*/
--
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