Bin/bash - xmessage very slow Post: 303001887

Sponsored Content

Top Forums Shell Programming and Scripting Bin/bash - xmessage very slow Post 303001887 by Don Cragun on Sunday 13th of August 2017 08:00:33 PM

08-13-2017

Registered User

It isn't xmessage nor bash that is taking so long, it is vcgencmd. With the path that you are using to invoke that command, we have to assume that this command is not a standard part your operating system and has been installed from a third party vendor or written by someone at your company.

Do you have a manual page for this utility? If so, does it saying anything about options or configuration parameters to shorten the time allowed for a device to respond to a probe?

Have you tried the commands:

Code:

/opt/vc/bin/vcgencmd -h

and:

Code:

/opt/vc/bin/vcgencmd -"?"

to see if there are any built-in help messages that might tell you?

If there is an option or configuration value that can be used to shorten the timeout that program uses before deciding that no camera is connected to your system, note that you may get false negatives if you shorten the time too much. Some devices take a while to warm up and be able to respond when they are probed. And, if the camera you're probing is a device that is accessed through a network (i.e., not directly attached to your computer), network delays can exacerbate any delays imposed by the device itself.

Don Cragun

View Public Profile for Don Cragun

Find all posts by Don Cragun

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

xmessage

i want to maximise the xmessage window?for that what i have to do?

2. Shell Programming and Scripting

#!/bin/bash has stopped working

Hi I'm writing a script and I've put #!/bin/bash as the first line so that I can just type my scripts name 'whodate' at PS1 instead of ./whodate. This has suddenly stopped working for me. It used to be the case that I could start a script with #!/bin/bash and it would work, but for this script...

3. Shell Programming and Scripting

/bin/bash - variable substitution.

Is it possible with a bash variable to perform multiple substitution strings to one variable? I have this variable: echo $clock TIMEZONE="US/Central" What I would like to do with bash only it pull out just the "US" part of the variable.. which could be any number of countries. this is...

4. Shell Programming and Scripting

Bash script too slow

I have a bash script that will take approx. 130 days to complete. I am trying to grep a list of 1,144 user ID's out of 41 (1 GB each) files. The 41 files were originally one 41 G file, but that was horrendously too slow.:eek: This is my current file: #!/bin/bash for i in `cat...

5. Shell Programming and Scripting

BIN/BASH.

THANKS UNIX SYSTEM�.I was found my job from UNIX�.I USE MONKEY WRENCH WITH WARTER.I am now studying my studio with UNIX SYSTEM�. THANKS UNIX SYSTEM�. THANKS OUR OPEN GROUP. from Takayasu Sakashita.My name is Takayasu Sakashita. I respect you. Austin.PEACE!Bey bey. Your friend TAKA.Good...

6. Shell Programming and Scripting

bin bash decimal compare

I need decimal comparing with if. Check if apache version is less than 2.2.17. I tried this and not working. #!/bin/bash apachever=`/usr/local/apache/bin/httpd -v | head -1 | awk '{print $3}' |cut -d/ -f 2` if ]; then echo "Apache version less than 2.2.17" else ...

7. Shell Programming and Scripting

/bin/bash: Event not found.

Hi I'm new to scripting - please help me... I'm trying to run a script written by a friend: #!/bin/bash for aStat in .... do .... done when coping the script to the terminal I get: /bin/bash: Event not found. for: Command not found.

8. Shell Programming and Scripting

BASH Slow Under Cron Only!

I've got a BASH script that runs much faster from the command line than when invoked under CRON. Ideas? Priority? IO?

9. Shell Programming and Scripting

Usage of #!/bin/sh vs #!/bin/bash shell scripts?

Some question about the usage of shell scripts: 1.) Are the commands of the base shell scripts a subset of bash commands? 2.) Assume I got a long, long script WITHOUT the first line. How can I find out if the script was originally designed f�r "sh" or "bash"? 3.) How can I check a given...

10. UNIX for Beginners Questions & Answers

In Bash shell - the ps -ef shows only the /bin/bash but the script name is not displayed

In Bash shell - the ps -ef shows only the /bin/bash but the script name is not displayed ? Is there any way to get the script names for the process command ? --- Post updated at 08:39 AM --- in KSH (Korn Shell), my command output shows the script names but when run in the Bash Shell...

LEARN ABOUT OPENSOLARIS

device

DEVICE(9)						   BSD Kernel Developer's Manual						 DEVICE(9)

NAME

     device -- an abstract representation of a device

SYNOPSIS

     typedef struct device *device_t;

DESCRIPTION

     The device object represents a piece of hardware attached to the system such as an expansion card, the bus which that card is plugged into,
     disk drives attached to the expansion card etc.  The system defines one device, root_bus and all other devices are created dynamically during
     autoconfiguration.  Normally devices representing top-level busses in the system (ISA, PCI etc.) will be attached directly to root_bus and
     other devices will be added as children of their relevant bus.

     The devices in a system form a tree.  All devices except root_bus have a parent (see device_get_parent(9)).  In addition, any device can have
     children attached to it (see device_add_child(9), device_add_child_ordered(9), device_find_child(9), device_get_children(9), and
     device_delete_child(9)).

     A device which has been successfully probed and attached to the system will also have a driver (see device_get_driver(9) and driver(9)) and a
     devclass (see device_get_devclass(9) and devclass(9)).  Various other attributes of the device include a unit number (see
     device_get_unit(9)), verbose description (normally supplied by the driver, see device_set_desc(9) and device_get_desc(9)), a set of bus-spe-
     cific variables (see device_get_ivars(9)) and a set of driver-specific variables (see device_get_softc(9)).

     Devices can be in one of several states:

     DS_NOTPRESENT  the device has not been probed for existence or the probe failed

     DS_ALIVE	    the device probe succeeded but not yet attached

     DS_ATTACHED    the device has been successfully attached

     DS_BUSY	    the device is currently open

     The current state of the device can be determined by calling device_get_state(9).

SEE ALSO

     devclass(9), driver(9)

AUTHORS

     This manual page was written by Doug Rabson.

BSD
								   June 16, 1998							       BSD

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

xmessage

Discussion started by: lakshmananindia

2. Shell Programming and Scripting

#!/bin/bash has stopped working

Discussion started by: zorrokan

3. Shell Programming and Scripting

/bin/bash - variable substitution.

Discussion started by: trey85stang

4. Shell Programming and Scripting

Bash script too slow

Discussion started by: tigta09