Cat Write Error Invalid Argument
Contents |
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us ubuntu cat write error invalid argument Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community
Echo Write Error Invalid Argument Linux
Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up bash - bash echo write error invalid argument echo: write error: invalid argument up vote 2 down vote favorite I am new to bash and trying to write a script that disables kworker business as in aMaia's answer here. So far, I have this, which I run from root: 1 echo erreur d écriture argument invalide #!/bin/bash 2 3 cd /sys/firmware/acpi/interrupts 4 for i in gpe[[:digit:]]* # Don't mess with gpe_all 5 do 6 num=`awk '{print $1}' $i` 7 if (( $num >= 1000 )); then # potential CPU hogs? 8 # Back it up and then disable it!! 9 cp $i /root/${i}.backup 10 echo "disable" > $i 11 fi 12 done But running it results in: ./kkiller: line 10: echo: write error: Invalid argument What is going on here? I thought $i was just the file name, which seems like
Cat Is Invalid Command
the correct syntax for echo. Suggestions for cleaning up/improving the script in general are also appreciated! Update: With set -vx added to the top of the script, here is a problematic iteration: + for i in 'gpe[[:digit:]]*' awk '{print $1}' $i ++ awk '{print $1}' gpe66 + num=1024908 + (( 1024908 >= 1000 )) + cp gpe66 /root/gpe66.backup + echo disable ./kkiller: line 10: echo: write error: Invalid argument bash shell scripting echo sh share|improve this question edited Jan 1 '15 at 21:37 asked Jan 1 '15 at 21:19 nicole 1,16722249 you need to see what value is being stored in $i, add set -vx after the first line of your script. You'll get the shell debug/trace output. I think you'll see that $i will be value like gpe99, which won't work in your test (( $num > = 1000 )). I'm not sure about echo "disable" > $i, so include more debugging output in your question so we can help you. (Cmd executed, and error msg as they occur in your output). Good luck. –shellter Jan 1 '15 at 21:29 add a comment| 2 Answers 2 active oldest votes up vote 0 down vote accepted I think it has something to with permissions. I don't think root has write access to those files by default. Try echoing manually 'disable' to that file, even as root you get the same error shown. So to make your script work, first do chmod 744 on $i before your echo, it should do the tr
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of fatal write error invalid argument this site About Us Learn more about Stack Overflow the company Business git write error invalid argument Learn more about hiring developers or posting ads with us Super User Questions Tags Users Badges Unanswered Ask Question
Sha1 File Stdout Write Error Invalid Argument
_ Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a http://stackoverflow.com/questions/27734792/bash-echo-write-error-invalid-argument question Anybody can answer The best answers are voted up and rise to the top Bash Script: Invalid argument up vote 4 down vote favorite Why can't I use echo $1 > /sys/class/backlight/acpi_video0/brightness in a simple bash script? It gives me the error: echo: write error: Invalid argument. bash unix share|improve this question edited Feb 4 '12 at 6:29 Garrett 3,66411330 asked Feb 3 http://superuser.com/questions/385761/bash-script-invalid-argument '12 at 22:31 David Thorisson 12826 Having the same issue while trying to do the same thing. I've tried things like function brightness { bright=$1; sudo su -c 'echo "$bright" > /sys/class/backlight/acpi_video0/brightness'; } too, but I still haven't figured it out. –hangtwenty Nov 2 '12 at 12:15 add a comment| 4 Answers 4 active oldest votes up vote 1 down vote accepted Try echo "$1" > /sys/class/backlight/acpi_video0/brightness. I bet the shell is expanding $1 and thus echo thinks it is receiving a bunch of arguments, rather than a string. share|improve this answer answered Feb 4 '12 at 0:35 surfasb 19.2k33663 add a comment| up vote 0 down vote You should check what the actual value of $1 is. This error means you are trying to write an invalid value -- either it's out of range or just in general not a meaningful value. At a glance, it appears that it accepts an integer in the range 0 to 8 (for me at least). share|improve this answer answered Feb 4 '12 at 6:42 FatalError 1,388813 add a comment| up vote 0 down vote Try using let #!/bin/bash POLKU='/sys/class/backlig
Sign in Pricing Blog Support Search GitHub This repository https://github.com/Sepero/temp-throttle/issues/5 Watch 12 Star 77 Fork 23 Sepero/temp-throttle Code Issues https://bugzilla.kernel.org/show_bug.cgi?id=7249 11 Pull requests 1 Projects 0 Pulse Graphs New issue Line 82: echo: write error: Invalid argument #5 Closed andyforceno opened this Issue Apr 27, 2014 · 21 comments Projects None yet Labels None yet write error Milestone No milestone Assignees Sepero 5 participants andyforceno commented Apr 27, 2014 When I run temp_throttle.sh with root privileges, the following error is displayed in the shell terminal: Lines 80 - 83 are: echo $FREQ_TO_SET for i in $(seq 0 $CORES); do echo $FREQ_TO_SET write error invalid > /sys/devices/system/cpu/cpu$i/cpufreq/scaling_max_freq done I'm wondering will this error affect the function of the script? It seems to be working OK, my laptop isn't going above 60c, which is the desired threshold. I am running Peppermint Linux 3. If you need any other info, let me know! Sepero self-assigned this Apr 28, 2014 Owner Sepero commented Apr 28, 2014 Fascinating error. I can try to solve it for you, but I'll need some more info about your system. Run this- find /sys/ -iname "*freq*" > freq_list.txt It will save output into a file named "freq_list.txt". I need to view the that output. andyforceno commented Apr 28, 2014 Here is the output from that file: /sys/devices/pnp0/00:05/rtc/rtc0/max_user_freq /sys/devices/pci0000:00/0000:00:02.0/drm/card0/gt_RP1_freq_mhz /sys/devices/pci0000:00/0000:00:02.0/drm/card0/gt_min_freq_mhz /sys/devices/pci0000:00/0000:00:02.0/drm/card0/gt_RPn_freq_mhz /sys/devices/pci0000:00/0000:00:02.0/drm/card0/gt_RP0_freq_mhz /sys/devices/pci0000:00/0000:00:02.0/drm/card0/gt_cur_freq_mhz /sys/devices/pci0000:00/0000:00:02.0/drm/card0/gt_max_freq_mhz /sys/devices/system/cpu/cpu0/cpufreq /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq /sys/devices/system/cpu/cpu1/cpufreq /sys/devices/system/cpu/cpu1/cpufreq/cpuinfo_cur_freq /sys/devices/system/cpu/cpu1/cpufreq/cpuinfo_max_freq /sys/devices/system/cpu/cpu1/cpufreq/cpuinfo_min_freq /sys/devices/system/cpu/cpu1/cpufreq/scaling_max_freq /sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq /sys/devices/system/cpu/cpu2/cpufreq /sys/devices
[x] First Last Prev Next This bug is not in your last search results. Bug7249 - "write error: Invalid argument" when onlining already onlined CPU Summary: "write error: Invalid argument" when onlining already onlined CPU Status: REJECTED WILL_NOT_FIX Product: Platform Specific/Hardware Classification: Unclassified Component: x86-64 Hardware: i386 Linux Importance: P2 normal Assigned To: Andi Kleen URL: Keywords: Depends on: Blocks: Show dependency tree /graph Reported: 2006-10-02 15:08 UTC by Bryce Harrington Modified: 2008-09-05 04:09 UTC (History) CC List: 2 users (show) Markus.Rechberger protasnb See Also: Kernel Version: 2.6.18 Tree: Mainline Regression: --- Attachments Add an attachment (proposed patch, testcase, etc.) Description Bryce Harrington 2006-10-02 15:08:11 UTC Most recent kernel where this bug did not occur: Has been present in the 2.6.17 and 2.6.18 releases, -rc, -mm, and -git trees Distribution: Gentoo Hardware Environment: x86_64, 2x AMD Opteron Software Environment: See http://crucible.osdl.org/runs/2328/sysinfo/amd01.1/ Problem Description: In testing hotplug cpu recently, I notice a discrepancy in how it's handled on x86_64 vs. other architectures. Normally, if you attempt to online an already onlined cpu, it returns an exit code of 1 but no error message. However, on x86_64 it produces this error message: x86_64: # echo 1 > /sys/devices/system/cpu/cpu1/online -bash: echo: write error: Invalid argument # echo 0 > /sys/devices/system/cpu/cpu1/online # echo 0 > /sys/devices/system/cpu/cpu1/online -bash: echo: write error: Device or resource busy # echo 1 > /sys/devices/system/cpu/cpu1/online # echo 1 > /sys/devices/system/cpu/cpu1/online -bash: echo: write error: Invalid argument I think it should not be printing an error message in this case. Here is sample output on a couple other architectures: ia64, ppc64: # echo 1 > /sys/devices/system/cpu/cpu1/online # echo 1 > /sys/devices/system/cpu/cpu1/online # ec