SWI-Prolog -- http_write_passwd_file/2

Documentation
- Reference manual
- Packages
  - SWI-Prolog HTTP support
    - The HTTP server libraries
      - library(http/http_authenticate): Authenticate HTTP connections using 401 headers
        
        http_authenticate/3
        
        http_authorization_data/2
        
        http_current_user/3
        
        http_read_passwd_file/2
        
        http_write_passwd_file/2
        
        authenticate/3

Availability::- use_module(library(http/http_authenticate)).

Source

[det]http_write_passwd_file(+File, +Data:list)

Write password data Data to File. Data is a list of entries as below. See http_read_passwd_file/2 for details.

passwd(User, Hash, Fields)

To be done: Write to a new file and atomically replace the old one.