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.)
113
questions
1
vote
0answers
53 views
Why does calling `term-send-backspace` (just pressing backspace) create a newline in the `*terminal*` buffer in `term-mode`?
Specs:
i@debord:~$ emacs --version
GNU Emacs 26.3.50
Copyright (C) 2019 Free Software Foundation, Inc.
GNU Emacs comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of GNU Emacs
under the ...
1
vote
1answer
25 views
Process shell exited abnormally with code 53 on windows 10
I'm using emacs 26.2 installed through msys2.
Recently starting subprocesses from emacs has stopped working for me. Specifically M-x shell and shell-command-to-string.
I get the feeling this is due to ...
0
votes
0answers
24 views
Is it possible to control DTR and/or RTS for a serial process (serial-term)?
I create a serial port process with (serial-term), or the underlying (make-serial-process ...). Is it possible to control the DTR and/or RTS pins for the port from within Emacs?
Looking at the source ...
0
votes
0answers
33 views
Can emacs control other programs windows?
I am using start-process to start other programs as part of my workflow. For example starting a browser to display the HTML file I am working on, or Visual Studio to debug the EXE I just compiled.
...
1
vote
0answers
40 views
Elpy: how to stop the underlying RPC process?
Whenever elpy-mode is activated upon visiting a python file, I see a py.exe executable start, with a subtree of processes. This should be the remote procedure call (thanks @al0 for the explanation). ...
2
votes
1answer
52 views
How to pipe data through multiple processes?
Currently I'm generating text from a command, eg:
(with-temp-buffer
(call-process "my-command" nil t nil "my" "args")
;; operate on output in current buffer.
)
How can I use pipes, something ...
0
votes
0answers
20 views
How does one debug errors in a process filter, (setq debug-on-error t) does not pop up a *Backtrace*?
With annoying frequency I get errors in my *Messages* buffer that seem to come from process-filters however, I never get a *Backtrace* for them. So, I have to play around and do similar experiments ...
1
vote
1answer
67 views
Get process id for the Emacs own process
I'm supporting some elisp code that creates a temporary filename using a prefix and the user id. When I develop this, that is not enough since I will be running multiple instances concurrently.
So I'...
1
vote
0answers
32 views
Send a command to Emacs from an inferior process
Is it possible to send a command to Emacs from an inferior process? For my particular use-case, I would like to instruct Emacs to run the command inferior-ess-r-reload-hook (part of the ESS package) ...
0
votes
0answers
145 views
Emacs 26.3 + GnuTLS 3.6.11 does not validate TLS certificates
I am trying to check if the integrated GnuTLS library correctly validates a certificate provided from the server when a TLS connection is established.
First, I checked gnutls-cli works fine on my ...
0
votes
1answer
22 views
Clojure nrepl: 'cider-jack-in returns error: “Spawning child process: Invalid argument”
Running GNUEmacs 26.3 on Windows 10, trying to set up environment per instructions for 'Clojure for the Brave and True' from here:
https://github.com/flyingmachine/emacs-for-clojure/
I was able to ...
0
votes
1answer
48 views
how can I change the inferior Python process
I would like to be able to start Python 3 and ipython from Emacs in an inferior mode buffer. Currently start interpreter C-c C-p starts 2.7.
I know there must be a way to change to start another ...
2
votes
1answer
60 views
How can I query Emacs from a separate process?
I'm interested in tracking how I spend my time at work. I have been using ManicTime, and it does much of what I want.
However, I use Emacs as my primary editor, and ManicTime doesn't know how to get ...
1
vote
1answer
35 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
49 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
46 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
58 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
68 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
196 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
48 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 ...
5
votes
1answer
108 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
34 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
71 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"...
4
votes
1answer
69 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
70 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 ...
1
vote
0answers
88 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
32 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
88 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 ...
1
vote
0answers
63 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
106 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
34 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
110 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
578 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
63 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
95 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
233 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
33 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 ...
4
votes
1answer
651 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
313 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
551 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
71 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
1k 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
404 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
296 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
52 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
236 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
809 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
55 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
1answer
269 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
296 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'" ...
