Re: [Motion-user] File permissions

[GSO <gs...@ya...>]

OK, I think I've fathommed this one out

It appears Unix does not inherit rights, I was trained on Netware, which
does, I wasn't sure, so Lars, ignore my inital comment:

"permissions on a Unix-like system are not *inherited*. Files created within
a directory will not necessarily have the same permissions as that
directory"
https://secure.wikimedia.org/wikipedia/en/wiki/Filesystem_permissions

However I was still getting this:

root@amnesia:~# ls -ld /var/run/motion/
drwxr-xr-x 2 motion motion 40 2011-08-05 15:14 /var/run/motion/
root@amnesia:~# sudo -u motion /usr/bin/motion -p /var/run/motion/motion.pid
[0] Processing thread 0 - config file /etc/motion/motion.conf
[0] Processing config file /etc/motion/thread1.conf
[0] Processing config file /etc/motion/thread2.conf
[0] Processing config file /etc/motion/thread3.conf
[0] Processing config file /etc/motion/thread4.conf
[0] Motion 3.2.12 Started
[0] Motion going to daemon mode
root@amnesia:~# [0] Exit motion, cannot create process id file (pid file)
/var/run/motion.pid: Permission denied

Debian's motion init script does actually -chuid motion, but even without
using the init script the same permissions error results.

The solution was to not set the pid file on the command line, but in
/etc/motion/motion.conf:

process_id_file /var/run/motion/motion.pid

There must be some restrictions on setting the pid file in daemon mode
probably.

However I now seem to have another problem, running motion as root and all
is fine, but running motion as user motion:

sudo -u motion /usr/bin/motion

The following is /var/log/messages until the point that motion closes itself
down:

Aug  5 15:22:00 localhost motion: [0] Processing thread 0 - config file
/etc/motion/motion.conf
Aug  5 15:22:00 localhost motion: [0] Processing config file
/etc/motion/thread1.conf
Aug  5 15:22:00 localhost motion: [0] Processing config file
/etc/motion/thread2.conf
Aug  5 15:22:00 localhost motion: [0] Processing config file
/etc/motion/thread3.conf
Aug  5 15:22:00 localhost motion: [0] Processing config file
/etc/motion/thread4.conf
Aug  5 15:22:00 localhost motion: [0] Motion 3.2.12 Started
Aug  5 15:22:00 localhost motion: [0] Created process id file
/var/run/motion/motion.pid. Process ID is 19723
Aug  5 15:22:00 localhost motion: [0] Motion running as daemon process
Aug  5 15:22:00 localhost motion: [0] ffmpeg LIBAVCODEC_BUILD 3412993
LIBAVFORMAT_BUILD 3415808
Aug  5 15:22:00 localhost motion: [0] Thread 1 is from
/etc/motion/thread1.conf
Aug  5 15:22:00 localhost motion: [0] Thread 2 is from
/etc/motion/thread2.conf
Aug  5 15:22:00 localhost motion: [0] Thread 3 is from
/etc/motion/thread3.conf
Aug  5 15:22:00 localhost motion: [0] Thread 4 is from
/etc/motion/thread4.conf
Aug  5 15:22:00 localhost motion: [4] cap.driver: "uvcvideo"
Aug  5 15:22:00 localhost motion: [4] cap.card: "UVC Camera (046d:080f)"
Aug  5 15:22:00 localhost motion: [4] cap.bus_info:
"usb-0000:00:1d.7-1.3.1.1"
Aug  5 15:22:00 localhost motion: [4] cap.capabilities=0x04000001
Aug  5 15:22:00 localhost motion: [4] - VIDEO_CAPTURE
Aug  5 15:22:00 localhost motion: [4] - STREAMING
Aug  5 15:22:00 localhost motion: [4] Config palette index 8 (YU12) doesn't
work.
Aug  5 15:22:00 localhost motion: [4] Supported palettes:
Aug  5 15:22:00 localhost motion: [4] 0: YUYV (YUV 4:2:2 (YUYV))
Aug  5 15:22:00 localhost motion: [4] 1: MJPG (MJPEG)
Aug  5 15:22:00 localhost motion: [4] Selected palette YUYV
Aug  5 15:22:00 localhost motion: [4] Test palette YUYV (320x240)
Aug  5 15:22:00 localhost motion: [4] Using palette YUYV (320x240)
bytesperlines 640 sizeimage 153600 colorspace 00000008
Aug  5 15:22:00 localhost motion: [4] found control 0x00980900,
"Brightness", range 0,255
Aug  5 15:22:00 localhost motion: [4] #011"Brightness", default 128, current
50
Aug  5 15:22:00 localhost motion: [4] found control 0x00980901, "Contrast",
range 0,255
Aug  5 15:22:00 localhost motion: [4] #011"Contrast", default 32, current 32
Aug  5 15:22:00 localhost motion: [4] found control 0x00980902,
"Saturation", range 0,255
Aug  5 15:22:00 localhost motion: [4] #011"Saturation", default 38, current
38
Aug  5 15:22:00 localhost motion: [4] found control 0x00980913, "Gain",
range 0,255
Aug  5 15:22:00 localhost motion: [4] #011"Gain", default 0, current 0
Aug  5 15:22:00 localhost motion: [4] Resizing pre_capture buffer to 1 items
Aug  5 15:22:00 localhost motion: [2] cap.driver: "uvcvideo"
Aug  5 15:22:00 localhost motion: [2] cap.card: "Trust Webcam"
Aug  5 15:22:00 localhost motion: [2] cap.bus_info: "usb-0000:00:1d.7-1.2.4"
Aug  5 15:22:00 localhost motion: [2] cap.capabilities=0x04000001
Aug  5 15:22:00 localhost motion: [2] - VIDEO_CAPTURE
Aug  5 15:22:00 localhost motion: [2] - STREAMING
Aug  5 15:22:00 localhost motion: [2] Config palette index 8 (YU12) doesn't
work.
Aug  5 15:22:00 localhost motion: [2] Supported palettes:
Aug  5 15:22:00 localhost motion: [2] 0: YUYV (YUV 4:2:2 (YUYV))
Aug  5 15:22:00 localhost motion: [2] Selected palette YUYV
Aug  5 15:22:00 localhost motion: [2] Test palette YUYV (320x240)
Aug  5 15:22:00 localhost motion: [2] Using palette YUYV (320x240)
bytesperlines 640 sizeimage 153600 colorspace 00000008
Aug  5 15:22:00 localhost motion: [2] found control 0x00980900,
"Brightness", range -64,64
Aug  5 15:22:00 localhost motion: [2] #011"Brightness", default 2, current
-41
Aug  5 15:22:00 localhost motion: [2] found control 0x00980901, "Contrast",
range 0,64
Aug  5 15:22:00 localhost motion: [2] #011"Contrast", default 36, current 36
Aug  5 15:22:00 localhost motion: [2] found control 0x00980902,
"Saturation", range 1,128
Aug  5 15:22:00 localhost motion: [2] #011"Saturation", default 70, current
70
Aug  5 15:22:00 localhost motion: [2] found control 0x00980903, "Hue", range
-40,40
Aug  5 15:22:00 localhost motion: [2] #011"Hue", default 0, current 0
Aug  5 15:22:00 localhost motion: [2] found control 0x00980910, "Gamma",
range 72,500
Aug  5 15:22:00 localhost motion: [2] #011"Gamma", default 77, current 77
Aug  5 15:22:00 localhost motion: [2] found control 0x00980913, "Gain",
range 0,100
Aug  5 15:22:00 localhost motion: [2] #011"Gain", default 0, current 0
Aug  5 15:22:00 localhost motion: [2] Resizing pre_capture buffer to 1 items
Aug  5 15:22:00 localhost motion: [1] cap.driver: "zc3xx"
Aug  5 15:22:00 localhost motion: [1] cap.card: "USB Camera (046d:08af)"
Aug  5 15:22:00 localhost motion: [1] cap.bus_info: "usb-0000:00:1d.7-1.1"
Aug  5 15:22:00 localhost motion: [1] cap.capabilities=0x05000001
Aug  5 15:22:00 localhost motion: [1] - VIDEO_CAPTURE
Aug  5 15:22:00 localhost motion: [1] - READWRITE
Aug  5 15:22:00 localhost motion: [1] - STREAMING
Aug  5 15:22:00 localhost motion: [1] Config palette index 8 (YU12) doesn't
work.
Aug  5 15:22:00 localhost motion: [1] Supported palettes:
Aug  5 15:22:00 localhost motion: [1] 0: JPEG (JPEG)
Aug  5 15:22:00 localhost motion: [1] Selected palette JPEG
Aug  5 15:22:00 localhost motion: [1] Test palette JPEG (320x240)
Aug  5 15:22:00 localhost motion: [1] Using palette JPEG (320x240)
bytesperlines 320 sizeimage 29390 colorspace 00000007
Aug  5 15:22:00 localhost motion: [1] found control 0x00980900,
"Brightness", range 0,255
Aug  5 15:22:00 localhost motion: [1] #011"Brightness", default 128, current
39
Aug  5 15:22:00 localhost motion: [1] found control 0x00980901, "Contrast",
range 0,256
Aug  5 15:22:00 localhost motion: [1] #011"Contrast", default 128, current
128
Aug  5 15:22:00 localhost motion: [1] found control 0x00980910, "Gamma",
range 1,6
Aug  5 15:22:00 localhost motion: [1] #011"Gamma", default 4, current 4
Aug  5 15:22:00 localhost motion: [1] found control 0x00980912, "Auto Gain",
range 0,1
Aug  5 15:22:00 localhost motion: [1] #011"Auto Gain", default 1, current 1
Aug  5 15:22:01 localhost motion: [2] Resizing pre_capture buffer to 6 items
Aug  5 15:22:02 localhost motion: [1] Resizing pre_capture buffer to 1 items
Aug  5 15:22:02 localhost motion: [3] cap.driver: "uvcvideo"
Aug  5 15:22:02 localhost motion: [3] cap.card: "UVC Camera (046d:0819)"
Aug  5 15:22:02 localhost motion: [3] cap.bus_info: "usb-0000:00:1d.7-1.4.1"
Aug  5 15:22:02 localhost motion: [3] cap.capabilities=0x04000001
Aug  5 15:22:02 localhost motion: [3] - VIDEO_CAPTURE
Aug  5 15:22:02 localhost motion: [3] - STREAMING
Aug  5 15:22:02 localhost motion: [3] Config palette index 8 (YU12) doesn't
work.
Aug  5 15:22:02 localhost motion: [3] Supported palettes:
Aug  5 15:22:02 localhost motion: [3] 0: YUYV (YUV 4:2:2 (YUYV))
Aug  5 15:22:02 localhost motion: [3] 1: MJPG (MJPEG)
Aug  5 15:22:02 localhost motion: [3] Selected palette YUYV
Aug  5 15:22:02 localhost motion: [1] Resizing pre_capture buffer to 6 items
Aug  5 15:22:04 localhost motion: [3] Resizing pre_capture buffer to 1 items
Aug  5 15:22:04 localhost motion: [3] Resizing pre_capture buffer to 6 items
Aug  5 15:22:04 localhost motion: [1] Closing video device /dev/video0
Aug  5 15:22:04 localhost motion: [4] Resizing pre_capture buffer to 6 items
Aug  5 15:22:04 localhost motion: [2] Closing video device /dev/video1
Aug  5 15:22:04 localhost motion: [4] Closing video device /dev/video3
Aug  5 15:22:06 localhost motion: [0] Motion terminating
Aug  5 15:22:06 localhost motion: [0] Removed process id file (pid file).