Is it possible to add a custom keymap to lynx (in the config file ~/.lynxrc), which sends information (e.g. the current URL, html, title, etc.) to a shell command?
An example use case:
I am on OSX and the shell has a command open, which attempts to open anything given to it in a default fashion. So, if I am in lynx and want to move the current webpage to the default browser I would want to call open current-url from the shell.
Another:
Collating an organized bookmark file by sending URL and title to a shell script (or something else).
Using the default keymap ! opens up the default shell, but it doesn't give me the URL nor does it run a single command and exit back to lynx as I would want for this.
Any ideas would be greatly appreciated.
I actually ended up finding a couple ways to handle this. Some are more ideal than others. It took some digging through the default lynx.cfg file to figure some of this out.
The following are the two most successful ways I accomplished sending info to a shell command from lynx:
place a variation of this in your lynx.cfg file. It can only send the URL, so it is limited by not being able to handle the title or any other information from the webpage without parsing a lynx dump itself. (This must be configured with --enable-extern, which is not available with MacPorts version of lynx, so you gotta install from source).
# in lynx.cfg
# EXTERNAL:<url>:<command> %s:<norestriction>:<allow_for_activate>[:environment]
# Ex 1: send the url to `open <url>` to open default browser
EXTERNAL:http:open %s:TRUE
# Ex 2: download with wget if ftp page
EXTERNAL:ftp:wget %s &:TRUE
# By default ',' and '.' map to running EXTERNAL on the page and link respectively
# KEYMAP:,:EXTERN_PAGE # Run external program with current page
# KEYMAP:.:EXTERN_LINK # Run external program with current link
Create a script and run it with printer to collect print environment variables.
# in lynx.cfg
# PRINTER:<name>:<command>:<option>:<lines/page>[:<environment>]
PRINTER:openurl:/Users/username/bin/openurl %s:TRUE
Then the script openurl, which opens the url in a default browser (OSX) contains:
#!/bin/sh
# /Users/username/bin/openurl
url=$LYNX_PRINT_URL
title=$LYNX_PRINT_TITLE
# other variables exist like the date etc... look them up :)
# http://osr600doc.sco.com/en/INT_lynxDoc/keystrokes/environments.html
# perform magic ...
/usr/bin/open $url
There may be other ways like using the lynxified proxies lynxexec, lynxprog, and lynxcgi, but I was unable to successfully pass variables with these methods in my own tests. If you know a way to get title and url information from these methods I would be interested in hearing it. The example #1 above could essentially grab the title and other information by invoking lynx or some other browser, so it is essentially possible to get everything done with that method. Also, it allows a single key mapped to perform the function, which the print screen adds several keystrokes to the mix, which is undesirable. I recommend #1 above.
Related
I'm working on cluster and using custom toolkits (more specifically SRA toolkit). In order to use it, I fist had to download (and unpack it) to a specific folder in my directory.
Then I had to modify .bashsrc to include the following segment:
# User specific aliases and functions
export PATH="$PATH:/home/MYNAME/APPS/SRATOOLS/bin"
Now I can use a stuff from SRATools in bash command line, e.g.
prefetch SR111111
My question is, can I use those tools without modifying my .bashsrc?
The reason that I want to do that is because I wrote a .sh script that takes a long time to run, and my cluster has Sun Grid Engine job management system, and I submitted my script to it, only to see the process fail - because a SRA Toolkit command I used was unrecognized.
EDIT (1):
I modified the location where my prefetch command is, and now it looks like:
/MYNAME/APPS/SRA_TOOLS/bin
different from how it is in .bashsrc:
export PATH="$PATH:/home/MYNAME/APPS/SRATOOLS/bin"
And run what #Darkman suggested (put IF THEN ELSE FI and under ELSE put export). The output is that it didn't find SRATools (because path in .bashsrc is different), but it found them under ELSE and script is running normally. Weird. It works on my job management system.
Thanks everybody.
I have to build one application which on button click starts passing command with putty.exe how can it be done with process.start ?
Process.start(#"C:\putty.exe")
ProcessStartInfo startinfo = new ProcessStartInfo();
startInfo.FileName=#"C:\putty.exe"
startInfo.Arguments = "some load session";
this is my current code but i want to push certain script and commands to putty terminal as well
It looks like PuTTY's command line support is rather minimal, but the -m option may work:
From http://the.earth.li/~sgtatham/putty/0.67/htmldoc/Chapter3.html#using-cmdline
3.8.3.6 -m: read a remote command or script from a file
The -m option performs a similar function to the ‘Remote command’ box in the SSH panel of the PuTTY configuration box (see section 4.18.1). However, the -m option expects to be given a local file name, and it will read a command from that file.
With some servers (particularly Unix systems), you can even put multiple lines in this file and execute more than one command in sequence, or a whole shell script; but this is arguably an abuse, and cannot be expected to work on all servers. In particular, it is known not to work with certain ‘embedded’ servers, such as Cisco routers.
You'll have to put your command(s) in a file before and pass that to PuTTY, but for simple tasks, it could work.
As mentioned in a comment on the question, Plink sounds much more amenable to what you're trying to do, as it (appears to) support a fully interactive session via the StandardInput and StandardOutput properties on the object you'll get back from Process.Start().
I am creating a new CLI application, where I want to get some sensitive input from the user. Since, this input can be quite descriptive as well as the information is a bit sensitive, I wanted to allow user to enter a command like this from this app:
app new entry
after which, I want to provide user with a VIM session where he can write this descriptive input, which when he exits from this VIM session, will be captured by my script and used for further processing.
Can someone tell me a way (probably some hidden VIM feature - since, I am always amazed by them) so that I can do so, without creating any temporary file? As explained in a comment below, I would prefer a some-what in-memory file, since the information can be a bit sensitive, and hence, I would like to process it first via my script and then only, write it to disk in an encrypted manner.
Git actually does this: when you type git commit, a new Vim instance is created and a temporary file is used in this instance. In that file, you type your commit message
Once Vim gets closed again, the content of the temporary file is read and used by Git. Afterwards, the temporary file gets deleted again.
So, to get what you want, you need the following steps:
create a unique temporary file (Create a tempfile without opening it in Ruby)
open Vim on that file (Ruby, Difference between exec, system and %x() or Backticks)
wait until Vim gets terminated again (also contained in the above SO thread)
read the tempoarary file (How can I read a file with Ruby?)
delete the temporary file (Deleting files in ruby)
That's it.
You can make shell create file descriptors attached to your function and make vim write there, like this: (but you need to split script in two parts: one that calls vim and one that processes its input):
# First script
…
vim --cmd $'aug ScriptForbidReading\nau BufReadCmd /proc/self/fd/* :' --cmd 'aug END' >(second-script)
. Notes:
second-script might actually be a function defined in first script (at least in zsh). This also requires bash or zsh (tested only on the latter).
Requires *nix, maybe won’t work on some OSes considered to be *nix.
BufReadCmd is needed because vim hangs when trying to read write-only descriptor.
It is suggested that you set filetype (if needed) right away, without using ftdetect plugins: in case your script is not the only one which will use this method.
Zsh will wait for second-script to finish, so you may continue script right after vim command in case information from second-script is not needed (it would be hard to get from there).
Second script will be launched from a subshell. Thus no variable modifications will be seen in code running after vim call.
Second script will receive whatever vim saves on standard input. Parent standard input is not directly accessible, but using </dev/tty will probably work.
This is for zsh/bash script. Nothing will really prevent you from using the same idea in ruby (it is likely more convenient and does not require splitting into two scripts), but I do not know ruby enough to say how one can create file descriptors in ruby.
Using vim for this seems like overkill.
The highline ruby gem might do what you need:
require 'highline'
irb> pw = HighLine.new.ask('info: ') {|q| q.echo = false }
info:
=> "abc"
The user's text is not displayed when you set echo to false.
This is also safer than creating a file and then deleting it, because then you'd have to ensure that the delete was secure (overwriting the file several times with random data so it can't be recovered; see the shred or srm utilities).
I am currently trying to write a script that uses expect to logon to SSH. Logging on to a server every prompt appears as [user#host]~/directory$ when I use a xterm color terminal. However, if I read the output from SSH directly with expect I see the following <ESC>]0;user#host:~/directory[user#host]~/directory$. Using export PS1="#-->" changes the result to <ESC>]0;user#host:~/directory#-->.
My question is: What does the sequence <ESC>]0;do? And which class of terminals does it belong to? I could not find it for neither VT52 nor VT100.
by default, the label of each tab is the name of the job that's running in that session. some systems are configured to augment this with additional information such as the hostname you're logged in to or your current directory; this is done by sending a special code of:
ESC]0;<string>^G
such as, ESC]0;david#Scott:~^G, would put "david#Scott:~" in my tab title
this is referred to as the XTERM hardstatus hack.
I am a newbie to unix scripting, I want to do following and I have little clue how to proceed.
I want to log the input and output of certain set of commands, given on the terminal, to a trace file. I should be able to switch it on and off.
E.g.
switch trace on
user:echo Hello World
user:Hello World
switch trace off
Then the trace log file, e.g. trace.log, it's content should be
echo Hello World
Hello World
One thing that I can think to do is to use set -x, redirecting its output to some file, but couldn't find a way to do that. I did man set, or man -x but I found no entry. Maybe I am being too naive, but some guidance will be very helpful.
I am using bash shell.
See script(1), "make typescript of terminal session". To start a new transcript in file xyz: script xyz. To add on to an existing transcript in file xyz: script -a xyz.
There will be a few overhead lines, like Script started on ... and Script done on ... which you could use awk or sed to filter out on printout. The -t switch allows a realtime playback.
I think there might have been a recent question regarding how to display a transcript in less, and although I can't find it, this question and this one address some of the same issues of viewing a file that contains control characters. (Captured transcripts often contain ANSI control sequences and usually contain Returns as well as Linefeeds.)
Update 1 A Perl program script-declutter is available to remove special characters from script logs.
The program is about 45 lines of code found near the middle of the link. Save those lines of code in a file called script-declutter, in a subdirectory that's on your PATH (for example, $HOME/bin if that's on your search path, else (eg) /usr/local/bin) and make the file executable. After that, a command like
script-declutter typescript > out
will remove most special characters from file typescript,
while directing the result to file out.