I am working on Solaris and working on a script that turns on any disabled service .
Here is the output file:
disabled 7:22:05 svc:/network/bla-bla:default
online Jun_14 svc:/network/blu-blu:default
I would like my code to parse this and turn the disabled one on using nawk itself
Here is what I have tried by it doesn't work for some reason:
cat output | nawk '/disabled/ {system(svcadm enable $3)}'
here is the output it gives:
**sh: line 1: svc:/network/bla-bla:default: not found**
The output i need on cat output |grep bl* is :
online 7:22:05 svc:/network/bla-bla:default
online Jun_14 svc:/network/blu-blu:default
Can anyone explain to me why this happens and how to make this nawk work. All I want is
svcadm enable svc:/network/bla-bla:default
to be executed.
Because it's treating svcadm as a variable name, which has no value. Try
nawk '{system("svcadm enable " $3)}'
(Sorry, I meant that as the nawk program -- corrected now.)
Related
For my powerlevel10k custom prompt, I currently have this function to display the seconds since the epoch, comma separated. I display it under the current time so I always have a cue to remember roughly what the current epoch time is.
function prompt_epoch() {
MYEPOCH=$(/bin/date +%s | sed ':a;s/\B[0-9]\{3\}\>/,&/;ta')
p10k segment -f 66 -t ${MYEPOCH}
}
My prompt looks like this: https://imgur.com/0IT5zXi
I've been told I can do this without the forked processes using these commands:
$ zmodload -F zsh/datetime p:EPOCHSECONDS
$ printf "%'d" $EPOCHSECONDS
1,648,943,504
But I'm not sure how to do that without the forking. I know to add the zmodload line in my ~/.zshrc before my powerlevel10k is sourced, but formatting ${EPOCHSECONDS} isn't something I know how to do without a fork.
If I were doing it the way I know, this is what I'd do:
function prompt_epoch() {
MYEPOCH=$(printf "%'d" ${EPOCHSECONDS})
p10k segment -f 66 -t ${MYEPOCH}
}
But as far as I understand it, that's still forking a process every time the prompt is called, correct? Am I misunderstanding the advice given because I don't think I can see a way to get the latest epoch seconds without running some sort of process, which requires a fork, correct?
The printf zsh builtin can assign the value to a variable using the -v flag. Therefore my function can be rewritten as:
function prompt_epoch() {
printf -v MYEPOCH "%'d" ${EPOCHSECONDS}
p10k segment -f 66 -t ${MYEPOCH}
}
Thanks to this answer in Unix Stackoverflow: https://unix.stackexchange.com/a/697807/101884
I want to insert a line "new line" into a file "Textfile.txt" at line number 3 in AIX.
Before insertion Textfile.txt looks like
one
two
four
After Insertion Textfile.txt looks like
one
two
new line
four
I have already done it on Linux how ever with AIX I am finding it not working with solution of Linux.
Surprisingly I couldn't find a simple solution for this problem anywhere.
I am using this command in Linux and is working
echo "target_node = ${arr[0]}"
echo "target_file = ${arr[1]}"
echo "target_line = ${arr[2]}"
echo "target_text = ${arr[3]}"
escape "$(ssh -f ${arr[0]} "sed -i "${arr[2]}i$(escape ${arr[3]})" ${arr[1]}; exit")"
To sum the previous bits of information written as comments:
Option -i doesn't exist in AIX!sed, use a temporary file; the syntax of command is more strict than in Linux.
sed '2a\
Insert this after the 2nd line' "$target_file" >"$target_file.tmp"
mv -- "$target_file.tmp" "$target_file"
Hi Thanks for the help,
I created script in such a way that it copies the file to linux update changes and movies to AIX.
I created a batch script for windows that I use for mux mkv files.
When launch this command:
ffprobe -v 0 -select_streams s -show_entries stream=index:disposition=default -of compact=nk=0 file.mkv | findstr disposition:default=1
Output is:
stream|index=3|disposition:default=1
How can filter and print only number "3" and put it in a variable?
I submit a new command that simplify output:
ffprobe -v 0 -select_streams s -show_entries stream=index:disposition=forced:stream_tags=language -of csv=nk=1:p=0 file.mkv | FINDSTR /C:"1,ita"
Output is:
3,1,ita
"3" is track id, "1" is forced flag, "ita" is track language. To create a variable that contains only the track id (e.g. 3) to be inserted in a mkvmerge command, I ran this command:
FOR /F "delims=, tokens=1" %%# IN ('ffprobe -v 0 -select_streams s -show_entries stream=index:disposition=forced:stream_tags=language -of csv=nk=1:p=0 file.mkv ^| FINDSTR /C:"1,ita"') DO SET subid=%%#
But nothing happens! Mkvmerge report this error: Error: Invalid track ID or language code in '-s '.
I don't really know where the mistake is!
Batchfile approach
You need to execute your command inside a for statement inside a batch file to be able to capture the output lines and process them further. Check for /? on the command line and the part with for /f and learn about "usebackq".
The key point is, that you need to escape several special characters from your command, if it is executed in the for statement and not on the command line prompt directly.
Try getting this piece to work and post your solution as update to your answer if you like. Then we can get to the second part of extracting the number.
Im having an issue writing a DCL in OpenVMS in that I need the DCL to call a command and capture its output (but not output the output to the screen) Later on in the DCL I then need to print that output I stored.
Heres an example:
ICE SET FASTER !This command sets my environment to the "Faster" environment.
The above command outputs this if executed directly in OpenVMS:
Initialising TEST Environment to FASTER
--------------------------------------------------------------------------------
Using Test Search rules FASTER
Using Test Search rules FASTER
--------------------------------------------------------------------------------
dcl>
So I created a DCL in an attempt to wrap this output in order to display a more simplified output. Heres my code so far:
!************************************************************************
$ !* Wrapper for setting ICE account. Outputs Environment
$ !************************************************************************
$ on error then goto ABORT_PROCESS
$ICE_DCL_MAIN:
$ ice set 'P1'
$ ICE SHOW
$ EXIT
$ABORT_PROCESS:
$ say "Error ICING to: " + P1
$ EXIT 2
[End of file]
In the lines above ICE SET 'P1' is setting the ice environment, but I dont want this output to be echoed to VMS. But what I do want is to write the output of $ICE SHOW into a variable and then echo that out later on in the DCL (most of which ive omitted for simplification purposes)
So what should be outputted should be:
current Test Environment is DISK$DEVELOPERS:[FASTER.DEVELOP]
Instead of:
Initialising TEST Environment to FASTER
--------------------------------------------------------------------------------
Using Test Search rules FASTER
Using Test Search rules FASTER
--------------------------------------------------------------------------------
current Test Environment is DISK$DEVELOPERS:[FASTER.DEVELOP]
Ive had a look through the manual and im getting a bit confused so I figured I tried here. Id appreciate any pointers. Thanks.
EDIT
Here is what ive come up with after the comments, the problem im having is when I connect to VMS using an emulator such as SecureCRT the correct output is echoed. But when I run the DCL via my SSH2 library in .NET it doesnt output anything. I guess thats because it closes the SYS$OUTPUT stream temporarily or something?
$ !************************************************************************
$ !* Wrapper for setting ICE account. Outputs Environment
$ !************************************************************************
$ on error then goto ABORT_PROCESS
$ICE_DCL_MAIN:
$ DEFINE SYS$OUTPUT NL:
$ ice set 'P1'
$ DEASSIGN SYS$OUTPUT
$ ice show
$ EXIT
$ABORT_PROCESS:
$ say "Error ICING to: " + P1
$ EXIT 2
[End of file]
EDIT 2
So I guess really I need to clarify what im trying to do here. Blocking the output doesnt so matter so much, im merely trying to capture it into a Symbol for example.
So in C# for example you can have a method that returns a string. So you'd have string myResult = vms.ICETo("FASTER"); and it would return that and store it in the variable.
I guess im looking for a similar thing in VMS so that once ive iced to the environment I can call:
$ environment == $ICE SHOW
But I of course get errors with that statement
The command $ assign/user_mode Thing Sys$Output will cause output to be redirected to Thing until you $ deassign/user_mode Sys$Output or next executable image exits. An assignment without the /USER_MODE qualifier will persist until deassigned.
Thing can be a logical name, a file specification (LOG.TXT) or the null device (NLA0:) if you simply want to flush the output.
When a command procedure is executed the output can be redirected using an /OUTPUT qualifier, e.g. $ #FOO/output=LOG.TXT.
And then there is piping ... .
You can redirect the output to a temp file and then print its content later:
$ pipe write sys$output "hi" > tmp.tmp
$ ty tmp.tmp
VMS is not Unix, DCL is not Bash: you can not easily set a DCL symbol from the output of a command.
Your ICE SHOW prints one line, correct? The first word is always "current", correct?
So you can create a hack.
First let me fake your ICE command:
$ create ice.com
$ write sys$output "current Test Environment is DISK$DEVELOPERS:[FASTER.DEVELOP]"
^Z
$
and I define a dcl$path pointing to the directory where this command procedure is
so that I can use/fake the command ICE
$ define dcl$path sys$disk[]
$ ice show
current Test Environment is DISK$DEVELOPERS:[FASTER.DEVELOP]
$
Now what you need, create a command procedure which sets a job logical
$ cre deflog.com
$ def/job/nolog mylog "current''p1'"
^Z
$
And I define a command "current" to run that command procedure:
$ current="#deflog """
Yes, you need three of the double quotes at the end of the line!
And finally:
$ pipe (ice show | #sys$pipe) && mysym="''f$log("mylog")'"
$ sh symb mysym
MYSYM = "current Test Environment is DISK$DEVELOPERS:[FASTER.DEVELOP]"
$
On the other hand, I don't know what you are referring to C# and Java. Can you elaborate on that and tell us what runs where?
You can try using: DEFINE /USER SYS$OUTPUT NL:.
It works only for the next command and you dont need to deassign.
Sharing some of my experience here. I used below methods to redirect outputs to files.
Define/Assign the user output and then execute the required command/script afterwards. Output will be written to .
$define /user sys$output <file_path>
execute your command/script
OR
assign /user <file_path> sys$output
execute your command/script
deassign sys$output
To re-direct in to null device like in Unix (mentioned in above answers), you can use 'nl:' instead of
define /user sys$output nl:
or
assign /user nl: sys$output
Not sure if you can do this through tail and grep. Lets say I have a log file that I would like to tail. It spits out quite a bit of information when in debug mode. I want to grep for information pertaining to only my module, and the module name is in the log like so:
/*** Module Name | 2014.01.29 14:58:01
a multi line
dump of some stacks
or whatever
**/
/*** Some Other Module Name | 2014.01.29 14:58:01
this should show up in the grep
**/
So as you can imagine, the number of lines that would be spit out pertaining to "Module Name" could be 2, or 50 until the end pattern appears (**/)
From your description, it seems like this should work:
tail -f log | awk '/^\/\*\*\* Module Name/,/^\*\*\//'
but be wary of buffering issues. (Lines printed to the file will very likely see high latency before actually being printed.)
I think you will have to install pcregrep for this. Then this will work:
tail -f logfile | pcregrep -M "^\/\*\*\* Some Other Module Name \|.*(\n|.)*?^\*\*/$"
This worked in testing, but for some reason, I had to append your example text to the log file over 100 times before output started showing up. However, all of the "Some other Module Name" data that was written to the log file as soon as this line was invoked was eventually printed to stdout.