Questions tagged [process]
A process is a running instance of a program. Use this tag for how Emacs interacts with programs that it runs (compilers, viewers, network backends, etc.)
103
questions
0
votes
1answer
22 views
Troubleshooting a hanging `list-processes`
Normally I'd use M-x list-processes to see what Emacs is running in the background. But in this case list-processes itself hangs. What is the right thing to do in this situation?
0
votes
1answer
41 views
Is variable assignment an atomic operation in elisp?
I have a situation in a mode I'm writing that saves a portion of the output of a long-running asynchronous process to a variable at intermittent intervals. I need to access this data periodically. My ...
1
vote
1answer
42 views
Lexical binding in a process filter
The code constantly prints server-process: nil instead of the server process name:
-*- lexical-binding: t; -*-
(let* ((port 1234)
(server-process 'something))
(setq server-process
(...
0
votes
1answer
35 views
“call-process” hangs and does not launch the program
I’m dipping my toes into reading news with Gnus. I’d like to continue using the same editor as before for composing posts, so I put these forms in my gnus.el:
(setq message-tab-body-function 'edit-in-...
1
vote
1answer
62 views
How can I tell when non-interactive bash process is done executing a command?
I'm trying to write a different shell command line interface where the input line stays at the top. Output of previous commands should stack below:
> INPUT LINE
LAST OUTPUT (of command 1)
...
3
votes
3answers
104 views
How to determine which program is running inside an emacs shell buffer?
I have an emacs shell buffer which may or may not be running a certain interactive program such as ftp or python. I wish to write a lisp function which will interact with this program, but I would ...
0
votes
0answers
34 views
Filter to track end of process output in buffer by default
Taking advice from the manual as per this link:
https://www.gnu.org/software/emacs/manual/html_node/elisp/Filter-Functions.html
I've created a filter for a process I'm running under emacs.
(defun ...
0
votes
0answers
45 views
How can I make multiple calls to external binaries?
I want to write an interactive function to
Call an external binary
Write the output of the binary into a buffer
Process the buffer to extracts args for next call
Call another external binary using ...
4
votes
1answer
60 views
Send content of region or current line to a tmp file, then execute shell script with filename as argument
I am transitioning to Emacs with evil-mode after years of Vim. For work reasons I have to use a GUI statistics program (Stata) frequently. This program does not integrate well with external editors. ...
0
votes
1answer
25 views
Replacement for the sit-for function
Using currently the sit-for function, every time i hit any key and cause user input the sit-for will stop. Is there any possibility to have something like sit-for, while being able to move the cursor ...
1
vote
1answer
45 views
How to create shortcut that will kill process for buffer with fixed name
I have code like this to run R command from Emacs:
(defun call-r-command (command-list)
"run R command in shell buffer window
if there is displayed buffer that have shell it will use that window"...
0
votes
0answers
68 views
Check for active ERC process in Elisp and join channel
I try to join an IRC channel with ERC in my elisp script. If there is no active ERC process running I want to create one. So far I got this:
(progn
(if (not (and (fboundp 'erc-buffer-list)
...
0
votes
0answers
15 views
Emacs prompt a inexistent pid when initiate [duplicate]
Every time I launch emacs, it prompts that:
desktop file appears to be in use by PID ***,Use it may cause a conflicts.
Actually, I only run a single one emacs
me@host:~$ ps -aux | grep 'emacs' ...
4
votes
1answer
60 views
How to partially block user input while Emacs subprocess is running
I have a custom function that updates the etags file before prompting the user to input a desired tag to be located. Although I am pretty good about setting the current buffer to read-only before ...
1
vote
1answer
53 views
Launch ncurses application and cleanup once it exits
I'd like to occasionally use hg split and hg commit --interactive from Emacs, but those commands bring up a GUI. At the moment I either use a separate terminal or ansi-term for those, but would like ...
0
votes
0answers
53 views
How to kill a running process in compilation buffer in MS Windows?
I have tried using M-x kill-compilation and it doesn't kill the process (on Microsoft Windows). It just sends ^C, which makes my script to retry.
When I try to M-x kill-buffer on the compilation ...
0
votes
0answers
30 views
Emacs report a process which does not exist
When start Emacs from the terminal as
me@mbp: ~$ emacs --deamon
It prompts that
However, there does not exist such a pocesses
me@mbp~$ ps 8559
PID TTY STAT TIME COMMAND
me@mbp:~$ ps -el ...
1
vote
1answer
46 views
Open another emacs and cause conflicts
I have a GUI emacs running as the major working area,
When I reading articles from web, need to open a emacs as a tool to keep note;
Web on the left and new emacs on the right,
Usually, get ...
0
votes
0answers
53 views
Unknown *emacs* process
I recently realized that every time I lunch emacs, after a minute, a strange buffer appear in buffers list that is linked to an emacs process, infact it also appear in system's process list:
When I ...
1
vote
0answers
46 views
How to make process in compilation-mode think it's not running in interactive terminal?
I use minitest-mode which starts Ruby tests in compilation-mode:
(compilation-start
actual-command
'minitest-compilation-mode
(lambda (arg) (minitest-buffer-name (or file-name ""))))
Tests invoke ...
0
votes
1answer
25 views
External process hangs
I have written a simple Python 3 script:
#!/usr/bin/env python3
print('Hello world!')
The script works from the shell:
$ ./hello-world
Hello world!
Then, I have written some Lisp to run the ...
1
vote
1answer
88 views
Why does :command argument of make-process not work when string passed as a variable? [duplicate]
This works fine:
(make-process :name "my-proc2"
:buffer " *my-proc2*"
:command '("sh" "-c" "echo \"hi\"\nsleep 10\necho \"there\"")
:connection-type 'pipe
:...
2
votes
2answers
357 views
Kill inferior python in python.el mode
At the moment I am killing the Python interpreter with C-d each time I want to quit Python interpreter.
What is the name of the function to kill the Python interpreter in Python mode (the one which ...
0
votes
1answer
50 views
Inconsistent point in an elisp program and in a visible non-focused process buffer
I am able to collect output data from a process, but I don't understand the
coordination of point and process-mark. In particular, the visible cursor in
a non-selected window visiting the buffer does ...
0
votes
1answer
57 views
Asynchrony when collecting output in a process buffer?
I want to capture output from a process buffer. This is not a duplicate of How do I reliably get output from a process? because that questioner is presupposing comint and an architecture for a ...
0
votes
2answers
156 views
shell command on region with process substitution
If I want to execute a shell command on a region I know I can use
shell-command-on-region via M-|, what if the command I want to
redirect my selection does not accept redirection to it's standard ...
0
votes
1answer
32 views
How Can I Prevent make-process from failing if the default-directory doesn't exist?
Usually, when you open a file, Emacs prompts you to run M-x make-directory RET RET if the directory doesn't exist.
However, after writing my own advice, I realized that opening files in directories ...
2
votes
1answer
420 views
Differences between cmdproxy.exe and cmd.exe
What is the difference between:
(call-process "cmdproxy" nil "foo" nil "/c" "dir")
(call-process "cmd" nil "foo" nil "/c" "dir")
?
I seem to get exactly the same results in Emacs 25.1 on ...
3
votes
2answers
232 views
Run a process synchronously and obtain stdout and stderr in different buffers?
I'm using emacs version 25.1.1.
I would like to run a process synchronously and have its stdout and stderr end up in two different buffers. I know I can use make-process to separate stdout and stderr ...
5
votes
2answers
346 views
Set environment variables for spawned subprocesses
I would like to set the environment variables for a spawned subprocess only.
They are controlled by process-environment. The documentation says:
binding that variable with let is also reasonable ...
2
votes
1answer
56 views
What's the idiomatic way of writing an Emacs front-end to a command which supports streaming input and output like Telnet?
I would like to write an Emacs front-end to a server which supports Telnet connections, and I was wondering if there is an idiomatic way of doing this. Specifically, the program will work like this:
...
2
votes
1answer
720 views
Error in process filter
I am trying to play with the make-process function and get information from it. I am getting some errors in my process filter that I am having trouble understanding. When I run my ceedling-version ...
2
votes
0answers
303 views
How to get process name (or process) from PID in lisp?
I would like to check if my shell is running ssh or not by checking the process name. I tried to get the process name by:
(let* ((proc (get-process "shell")) (proc-child-id (process-running-child-p ...
6
votes
1answer
262 views
Process input seems buggy in Emacs on OS X
I have a process that I'm trying to send input to on OS X. I'm using Emacs' builtin functions for doing this: process-send-string and process-send-region. However, it seems that there are issues when ...
0
votes
1answer
42 views
Can I merge the buffers opened in one emacs process into the other emacs process?
In bash in a terminal emulator, I run two independent emacs processes.
I created them in bash by emacs -nw and in each, I opened several buffers.
I switch between them by making one process into ...
5
votes
1answer
182 views
Asynchronous version of shell-command-on-region?
I have a problem which is very similar to this one. I have some text that I'd like to listen to with macOS's say utility. Unfortunately, Emacs locks up when I use shell-command-on-region because it is ...
4
votes
0answers
564 views
Run interactive shell script in new buffer using elisp
I am looking for a way to display and interact with long running shell scripts in a separate buffer. While using eshell works, I'd like to automate most shell tasks using elisp.
The best way I came ...
0
votes
0answers
53 views
Running a single Emacs instance
I'd like to set in my dot-emacs a function to detect if an Emacs instance is already running, possibly exiting Emacs informing user.
To do this I should query the OS for running processes. However
(...
4
votes
0answers
186 views
Shell coding system
If, before M-x shell, I run C-x RET c
(universal-coding-system-argument) I can change the coding system used by the shell.
Therefore, given
echo Straße > foo
foo will be encoded in the related ...
2
votes
1answer
206 views
Interpolate environment variables in string
I am trying to write a function that will interpolate the enviroment variables stored in process-environment in a string. For example, if I have the string "This is $Foo and ${Bar}_none and '$skip'" ...
0
votes
1answer
179 views
ansi colors for bash process
I'm trying to get ansi colors from my bash process, but I can't get this to work.
(setq shell-process-name "shell-process-name")
(setq shell-process-buffer "*shell-process-buffer*")
(defun open-...
0
votes
1answer
63 views
Is it possible to safely eject flash drive from Emacs
Windows 10, Emacs 25.1.
If I want to safe eject usb flash drive I use this (on system tray)
Is it possible to do this in Emacs?
0
votes
1answer
77 views
file-notify-add-watch : get file path string
I would to do a specific action (create an org-mod link) when a new file appears in a given directory. For that I need to catch the event but also the path of the new file. I managed to use file-...
0
votes
1answer
220 views
Reuse tramp connection details to start putty session
I often connect to remote servers using tramp to do some work, however sometimes after editing files I need to connect using PuTTY in order to do some specific task.
At the moment I open up PuTTY, ...
4
votes
2answers
455 views
Pass an argument to a sentinel
From the Elisp manual at the Sentinels chapter:
The sentinel receives two arguments: the process for which the event occurred, and a string describing the type of event.
But I need it to receive ...
0
votes
1answer
108 views
redirect stderr to a file in call-process-region
I have been reading the documentation for call-process-region here and I am trying to redirect stderr to a file. from the the documentation, this looks correct
(call-process-region beg end perltidy-...
2
votes
2answers
66 views
Introspect whether a process created with `start_process` is still running and when it exits
I'm using start-process to run a process upon certain events picked up with hooks
(start-process "foo" "*Foo*" foo-command foo-args)
I would like to do 2 things with this.
Prevent the process from ...
1
vote
0answers
26 views
ANSI coloring in emacs start-process output buffer [duplicate]
I am running a process from within emacs which uses ANSI color codes in its output.
I'm using start-process to create the process, and provided a custom buffer name for the process's output
(start-...
0
votes
2answers
254 views
kill-process doesn't kill process
Why does the following sexp hang?
(let ((buf
"*Async Shell Command*"))
(async-shell-command "cat")
(while (get-buffer-process buf)
(message "still has proc")
(kill-...
0
votes
1answer
118 views
Window's PID of the current emacs' process
I use to edit LaTeX documents with okular as pdf viewer in Ubuntu Linux. I have this code:
(defun okular-forward-search ()
(interactive)
(start-process
"okular"
"okular-output"
"okular" ;...
