BASH redirect & grep -v help needed
Hi All,
I am trying to get the standard output and error streams to be filtered so that any output with the string 'saved as' is discarded and the rest is appended to /home/dave/kmotion2/www/motion_output Me and BASH just do not get on, I have tried motion -c /home/dave/kmotion2/core/motion_conf/motion.conf &> | grep -v 'saved as' >> /home/dave/kmotion2/www/motion_output bash: syntax error near unexpected token `|' Any idea how to make this work Cheers Dave -- Please avoid sending me Word or PowerPoint attachments. See http://www.gnu.org/philosophy/no-word-attachments.html -- ubuntu-users mailing list ubuntu-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-users |
BASH redirect & grep -v help needed
On Wed, 2009-02-18 at 20:44 +0000, dave selby wrote:
> Hi All, > > I am trying to get the standard output and error streams to be > filtered so that any output with the string 'saved as' is discarded > and the rest is appended to /home/dave/kmotion2/www/motion_output > Me and BASH just do not get on, I have tried > > motion -c /home/dave/kmotion2/core/motion_conf/motion.conf &> | grep > -v 'saved as' >> /home/dave/kmotion2/www/motion_output > bash: syntax error near unexpected token `|' > > Any idea how to make this work motion -c /home/dave/kmotion2/core/motion_conf/motion.conf 2>&1 | grep -v 'saved as' >> /home/dave/kmotion2/www/motion_output This will pipe both the stdout and stderr through grep. e.g. redirect stderr (file descriptor 2) to file descriptor 1 (stdout). -- Smoot Carl-Mitchell Computer Systems and Network Consultant smoot@tic.com +1 480 922 7313 cell: +1 602 421 9005 -- ubuntu-users mailing list ubuntu-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-users |
BASH redirect & grep -v help needed
> motion -c /home/dave/kmotion2/core/motion_conf/motion.conf 2>&1 | grep
> -v 'saved as' >> /home/dave/kmotion2/www/motion_output > > This will pipe both the stdout and stderr through grep. e.g. redirect > stderr (file descriptor 2) to file descriptor 1 (stdout). Many thanks :) Still having a bit of trouble though - have slightly changed the code dave@main-system:~$ motion -c /home/dave/kmotion2/core/motion_conf/motion.conf 2>&1 | grep -v 'saved to' [0] Processing thread 0 - config file /home/dave/kmotion2/core/motion_conf/motion.conf [0] Processing config file /home/dave/kmotion2/core/motion_conf/thread01.conf [0] Processing config file /home/dave/kmotion2/core/motion_conf/thread02.conf [0] Motion 3.2.9 Started [0] ffmpeg LIBAVCODEC_BUILD 3352064 LIBAVFORMAT_BUILD 3344896 [0] Thread 1 is from /home/dave/kmotion2/core/motion_conf/thread01.conf [1] Thread 1 started [1] cap.driver: "uvcvideo" [1] cap.card: "UVC Camera (046d:08cc)" [1] cap.bus_info: "0000:00:10.4" [1] cap.capabilities=0x04000001 [1] - VIDEO_CAPTURE [1] - STREAMING [1] Supported palettes: [1] 0: MJPG (MJPEG) [1] 1: YUYV (YUV 4:2:2 (YUYV)) [0] Thread 2 is from /home/dave/kmotion2/core/motion_conf/thread02.conf [2] Thread 2 started [0] motion-httpd/3.2.9 running, accepting connections [0] motion-httpd: waiting for data on port TCP 8080 [1] Test palette YUYV (352x288) [1] Using palette YUYV (352x288) bytesperlines 704 sizeimage 202752 colorspace 00000008 [1] found control 0x00980900, "Brightness", range 0,255 [1] "Brightness", default 127, current 127 [1] found control 0x00980901, "Contrast", range 0,255 [1] "Contrast", default 32, current 32 [1] found control 0x00980902, "Saturation", range 0,255 [1] "Saturation", default 32, current 32 [1] found control 0x00980913, "Gain", range 0,255 [1] "Gain", default 0, current 0 [1] found control 0x08000000, "Backlight Compensation", range 0,2 [1] "Backlight Compensation", default 1, current 1 [1] found control 0x08000001, "Power Line Frequency", range 0,2 [1] "Power Line Frequency", default 2, current 2 [1] mmap information: [1] frames=4 [1] 0 length=202752 [1] 1 length=202752 [1] 2 length=202752 [1] 3 length=202752 [1] Using V4L2 Thats what I want outputed to a file dave@main-system:~$ dave@main-system:~$ dave@main-system:~$ dave@main-system:~$ motion -c /home/dave/kmotion2/core/motion_conf/motion.conf 2>&1 | grep -v 'saved to' >> xxx.out dave@main-system:~$ dave@main-system:~$ dave@main-system:~$ cat xxx.out dave@main-system:~$ So any idea why xxx.out contains zsip instead of the above ? Cheers Dave -- ubuntu-users mailing list ubuntu-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-users |
BASH redirect & grep -v help needed
On Wed, 2009-02-18 at 21:12 +0000, dave selby wrote:
> dave@main-system:~$ motion -c > /home/dave/kmotion2/core/motion_conf/motion.conf 2>&1 | grep -v 'saved > to' >> xxx.out > > dave@main-system:~$ > dave@main-system:~$ > dave@main-system:~$ cat xxx.out > dave@main-system:~$ > > So any idea why xxx.out contains zsip instead of the above ? No idea. What happens without the stderr redirection? -- Smoot Carl-Mitchell Computer Systems and Network Consultant smoot@tic.com +1 480 922 7313 cell: +1 602 421 9005 -- ubuntu-users mailing list ubuntu-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-users |
BASH redirect & grep -v help needed
>> So any idea why xxx.out contains zsip instead of the above ?
> > No idea. What happens without the stderr redirection? motion -c /home/dave/kmotion2/core/motion_conf/motion.conf 2>&1 | grep -v 'saved to' works a treat. 'motion' starts, outputs and keeps running and I have to ctrl-c to stop it. motion -c /home/dave/kmotion2/core/motion_conf/motion.conf 2>&1 | grep -v 'saved to' >> xxx.out outputs nothing, but zip in xxx.out I am wondering if the output to the BASH shell is 'instant' but the output to >> is only processed on 'motion' ending in some way ? Dave -- Please avoid sending me Word or PowerPoint attachments. See http://www.gnu.org/philosophy/no-word-attachments.html -- ubuntu-users mailing list ubuntu-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-users |
BASH redirect & grep -v help needed
Interesting ... after a few mins suddenly xxx.out is filled ?!??
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BASH redirect & grep -v help needed
dave selby wrote:
> Hi All, > > I am trying to get the standard output and error streams to be > filtered so that any output with the string 'saved as' is discarded > and the rest is appended to /home/dave/kmotion2/www/motion_output > Me and BASH just do not get on, I have tried > > motion -c /home/dave/kmotion2/core/motion_conf/motion.conf &> | grep > -v 'saved as' >> /home/dave/kmotion2/www/motion_output > bash: syntax error near unexpected token `|' > > This is kind of a work around but try making a script called myMotion #!/bin/sh motion -c /home/dave/kmotion2/core/motion_conf/motion.conf | grep -v 'saved as' >> /home/dave/kmotion2/www/motion_output Then call myMotion to run the command. This should be especially useful since you don't have to type in that long command every time you restart the system. -- -john To be or not to be, that is the question 2b || !2b (0b10)*(0b1100010) || !(0b10)*(0b1100010) 0b11000100 || !0b11000100 0b11000100 || 0b00111011 0b11111111 255, that is the answer. -- ubuntu-users mailing list ubuntu-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-users |
BASH redirect & grep -v help needed
On Wed, 2009-02-18 at 21:34 +0000, dave selby wrote:
> >> So any idea why xxx.out contains zsip instead of the above ? > > > > No idea. What happens without the stderr redirection? > > motion -c /home/dave/kmotion2/core/motion_conf/motion.conf 2>&1 | grep > -v 'saved to' > > works a treat. 'motion' starts, outputs and keeps running and I have > to ctrl-c to stop it. > > motion -c /home/dave/kmotion2/core/motion_conf/motion.conf 2>&1 | grep > -v 'saved to' >> xxx.out > > outputs nothing, but zip in xxx.out > > I am wondering if the output to the BASH shell is 'instant' but the > output to >> is only processed on 'motion' ending > in some way ? Are you saying "motion -c" has continuous output? If that is the case then you are seeing I/O buffering side effects. Try adding --line-buffered to the grep command. That will flush the output buffer after each line. -- Smoot Carl-Mitchell Computer Systems and Network Consultant smoot@tic.com +1 480 922 7313 cell: +1 602 421 9005 -- ubuntu-users mailing list ubuntu-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-users |
BASH redirect & grep -v help needed
2009/2/18 Smoot Carl-Mitchell <smoot@tic.com>:
> On Wed, 2009-02-18 at 21:34 +0000, dave selby wrote: >> >> So any idea why xxx.out contains zsip instead of the above ? >> > >> > No idea. What happens without the stderr redirection? >> >> motion -c /home/dave/kmotion2/core/motion_conf/motion.conf 2>&1 | grep >> -v 'saved to' >> >> works a treat. 'motion' starts, outputs and keeps running and I have >> to ctrl-c to stop it. >> >> motion -c /home/dave/kmotion2/core/motion_conf/motion.conf 2>&1 | grep >> -v 'saved to' >> xxx.out >> >> outputs nothing, but zip in xxx.out >> >> I am wondering if the output to the BASH shell is 'instant' but the >> output to >> is only processed on 'motion' ending >> in some way ? > > Are you saying "motion -c" has continuous output? It appears to have. If that is the case > then you are seeing I/O buffering side effects. Try adding > --line-buffered to the grep command. That will flush the output buffer > after each line. OK I did not realize grep could do this. Many thanks, Sorry for the delay, work related Cheers Dave > Smoot Carl-Mitchell > Computer Systems and > Network Consultant > smoot@tic.com > +1 480 922 7313 > cell: +1 602 421 9005 > > -- > ubuntu-users mailing list > ubuntu-users@lists.ubuntu.com > Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-users > -- Please avoid sending me Word or PowerPoint attachments. See http://www.gnu.org/philosophy/no-word-attachments.html -- ubuntu-users mailing list ubuntu-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-users |
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