https://github.com/jktr/arg-inject

add support for config files via LD_PRELOAD
https://github.com/jktr/arg-inject

command-line-arguments ld-preload shim

Last synced: 3 months ago
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add support for config files via LD_PRELOAD

• Host: GitHub
• URL: https://github.com/jktr/arg-inject
• Owner: jktr
• Created: 2019-04-22T04:59:52.000Z (almost 6 years ago)
• Default Branch: master
• Last Pushed: 2019-04-22T05:00:24.000Z (almost 6 years ago)
• Last Synced: 2024-08-03T17:10:21.865Z (6 months ago)
• Topics: command-line-arguments, ld-preload, shim
• Language: C
• Homepage:
• Size: 3.91 KB
• Stars: 15
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

• awesome-ld-preload - arg-inject - add support for config files (Libraries)

README

        
# Arg Inject

Have you ever wanted to add config file support into

binary-only applications? Or maybe your application takes a password

via command line and you don't want it showing up in `ps`?

Enter Arg Inject, a horrible bit of LD_PRELOAD trickery.

## usage

Build the shared object via `$ make`.

Place a file named `inject.conf` (or set a filename via

ENV_INJECT_FILE) in your $PWD that contains your program's

arguments. Note that each argument should be on a new line.

Example:

```

$ cat inject.conf

-l

-a

```

You can then proceed to call your program as follows:

```

$ LD_PRELOAD=$PWD/arg_inject.so ls -these-are-ignored -in-favor-of -inject.conf

total 44

drwx------ 1 jktr users   154 Apr 22 06:47 .

drwx------ 1 jktr users   126 Apr 22 06:36 ..

-rw------- 1 jktr users  2030 Apr 22 06:44 arg_inject.c

-rwx------ 1 jktr users 16576 Apr 22 06:46 arg_inject.so

-rw------- 1 jktr users     6 Apr 22 06:46 inject.conf

-rw------- 1 jktr users    82 Apr 22 06:46 Makefile

-rw------- 1 jktr users   648 Apr 22 06:47 README.md

```

## license 

This work is licensed (CC BY-SA 3.0); it's largely adapted from MvG's

Answer on Serverfault, which can be found

[here](https://serverfault.com/questions/592744/how-to-hide-a-password-passed-as-command-line-argument/592941#592941).