Jeremy Soller
84 lines
2.4 KiB
Rust
84 lines
2.4 KiB
Rust
#![deny(warnings)]
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#[macro_use]
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extern crate clap;
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extern crate extra;
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extern crate redox_users;
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use extra::option::OptionalExt;
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use std::process::exit;
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use redox_users::{All, AllGroups, Config, UsersError};
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const _MAN_PAGE: &'static str = /* @MANSTART{groupadd} */ r#"
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NAME
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groupadd - add a user group
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SYNOPSIS
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groupadd [ -f | --force ] GROUP
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groupadd [ -h | --help ]
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DESCRIPTION
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The groupadd utility adds a new user group using values
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passed on the command line and system defaults.
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OPTIONS
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-f, --force
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Simply forces the exit status of the program to 0
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even if the group already exists. A message is still
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printed to stdout.
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-g, --gid GID
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The group id to use. This value must not be used and must
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be non-negative. The default is to pick the smallest available
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group id (between values defined in redox_users).
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-h, --help
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Display this help and exit.
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AUTHOR
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Written by Wesley Hershberger.
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"#; /* @MANEND */
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fn main() {
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let args = clap_app!(groupadd =>
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(author: "Wesley Hershberger")
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(about: "Add groups based on the system's redox_users backend")
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(@arg GROUP: +required "Add group GROUP")
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(@arg FORCE: -f --force "Force the status of the program to be 0 even if the group exists")
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(@arg GID: -g --gid +takes_value "Group id. Positive integer and must not be in use")
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).get_matches();
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let mut sys_groups = AllGroups::new(Config::default()).unwrap_or_exit(1);
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let groupname = args.value_of("GROUP").unwrap();
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let gid = match args.value_of("GID") {
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Some(gid) => {
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let id = gid.parse::<usize>().unwrap_or_exit(1);
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if let Some(_group) = sys_groups.get_by_id(id) {
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eprintln!("groupadd: group already exists");
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exit(1);
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}
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id
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},
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None => sys_groups.get_unique_id().unwrap_or_else(|| {
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eprintln!("groupadd: no available gid");
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exit(1);
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})
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};
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match sys_groups.add_group(groupname, gid, &[""]) {
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Ok(_) => { },
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Err(ref err) if err.downcast_ref::<UsersError>() == Some(&UsersError::AlreadyExists) && args.is_present("FORCE") => {
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exit(0);
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},
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Err(err) => {
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eprintln!("groupadd: {}", err);
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exit(1);
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}
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}
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sys_groups.save().unwrap_or_exit(1);
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}
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