03-02-2019
Thanks @Corona688,
stdin> this is the shell stdin
I was hoping that it would be clear from the context that the stdin> is the entrance to the shell. I guess I need to work on the design of the presentation.
It seemed to me funny, for example, "echo" and "eval" commands. Both commands take parameters and do the same work. Only the first returns a string of them to the stdout and the second command to the stdin (shell stdin).
I'v added the feature of Xargs, above noted to my notes.
Last edited by nezabudka; 03-02-2019 at 07:58 AM..
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
My script has the following for loop in it.
foreach id (CLKM4 DGTM4 GNNM4)
eval echo $id \$${id}sf \$${id}sfk
end
so "id" is a variable defined in the loop, and "idsf" and "idsfk" are variables defined in another part of the script, they return values of 0 or more. The problem i'm... (2 Replies)
Discussion started by: wxornot
2 Replies
2. Shell Programming and Scripting
Hi All,
I'm running some encrypted data through a script I wrote. In order to do this, I'm using eval to resolve some of my variables. At the moment, when I use eval to resolve, it strips out some of my encrypted values, and totally drops some others. For example if I have the value ab1"3 it drops... (1 Reply)
Discussion started by: Khoomfire
1 Replies
3. UNIX for Dummies Questions & Answers
Bit of a weird one i suppose, i want to use an echo inside an echo... For example...
i have a script that i want to use to take users input and create another script. Inside this script it creates it also needs to use echos...
echo "echo "hello"" >$file
echo "echo "goodbye"" >$file
... (3 Replies)
Discussion started by: mokachoka
3 Replies
4. UNIX for Dummies Questions & Answers
So, I'm looking over /proc/cpuinfo and have a question... I've read that "siblings" refers to hyperthreading, but that seems odd considering the contents of cpuinfo. Here's a part:
model name : Intel(R) Xeon(R) CPU E5410 @ 2.33GHz
physical id : 0
siblings : 4
core... (1 Reply)
Discussion started by: treesloth
1 Replies
5. UNIX for Dummies Questions & Answers
Hi:
how come this command does not work? the error message is:
xargs: cd: No such file or directory
yet, in the same time, 'echo dir_path | xargs ls' works.
Does it work in bash? We use csh.
Thanks.
NB Phil (7 Replies)
Discussion started by: phil518
7 Replies
6. Shell Programming and Scripting
my command deletes the oldest file from a folder and I'd like to have some type of output when the file is selected or deleted.
ls -t -1 | tail -n 1 | xargs rm
I'm not sure how to incorporate echo into this.
Thanks, (2 Replies)
Discussion started by: evanlivingston
2 Replies
7. Shell Programming and Scripting
Hi all,
some small script with eval turned me to crazy.
my OS is linux
Linux s10-1310 2.6.16.53-0.8.PTF.434477.3.TDC.0-smp #1 SMP Fri Aug 31 06:07:27 PDT 2007 x86_64 x86_64 x86_64 GNU/Linux
below script works well
#!/bin/bash
eval ssh remotehost date
eval ssh remotehost ls
below... (1 Reply)
Discussion started by: summer_cherry
1 Replies
8. Shell Programming and Scripting
anyone has any info on why this is complaining???
vivek@vivek-c5e55ef2e ~/TAC
$ zoneCounter=1
vivek@vivek-c5e55ef2e ~/TAC
$ optUsage1=23%
vivek@vivek-c5e55ef2e ~/TAC
$ eval eval echo "<th>Zone $zoneCounter </th><th align=\"left\"> \$optUsage$zoneCounter </th>"
-bash: syntax error... (1 Reply)
Discussion started by: vivek d r
1 Replies
9. Shell Programming and Scripting
anyone has any info on why this is complaining???
vivek@vivek-c5e55ef2e ~/TAC
$ zoneCounter=1
vivek@vivek-c5e55ef2e ~/TAC
$ optUsage1=23%
vivek@vivek-c5e55ef2e ~/TAC
$ eval eval echo "<th>Zone $zoneCounter </th><th align=\"left\"> \$optUsage$zoneCounter </th>"
-bash: syntax error... (13 Replies)
Discussion started by: vivek d r
13 Replies
10. Shell Programming and Scripting
thank you (35 Replies)
Discussion started by: ratnalein88
35 Replies
LEARN ABOUT DEBIAN
gpiv_mktestimg
GPIV_MKTESTIMG(1) General Commands Manual GPIV_MKTESTIMG(1)
NAME
gpiv_mktestimg - Generates a simplified image for image processing.
SYNOPSIS
gpiv_mktestimg [-h | --help] [-p | --print] [-t N | --threshold N] [-w N] [-v | --version] [filename] < stdin > stdout
DESCRIPTION
gpiv_mktestimg generates an image (pair) in order to be processed by the processing tools. This program is provided for developing and
testing image processing tools.
The parameters read from the configuration resources (containing the key GPIV_IMGPROC) may be overruled by the command line options, as
explained below.
Options
-h | --help
On-line help
-t N | --threshold N
Threshold value
-v | --version
Print version information on standard output, then exit successfully.
-w N window size (default: 15)
filename
Input image filename. Overrides stdin and stdout with the full filename of the image. Output will be written to filename.png. Param-
eters are stored in filename.par and may be used for future use by including them in ./gpivrc. If stdin and stdout are used, the
input is expected to be a PNG formatted image.
SEE ALSO
gpivtools
AUTHOR
Gerber Van der Graaf
7 November 2006 GPIV_MKTESTIMG(1)