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citadel-realmfs moved into citadel-tool binary

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Bruce Leidl 2019-04-02 15:20:38 -04:00
parent a984632123
commit ce10df3dfc
1 changed files with 244 additions and 0 deletions
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citadel-tool/src/realmfs/mod.rs Normal file
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use clap::App;
use clap::ArgMatches;
use libcitadel::{Result,RealmFS,Logger,LogLevel};
use clap::SubCommand;
use clap::AppSettings::*;
use clap::Arg;
use libcitadel::ResizeSize;
use libcitadel::format_error;
use std::process::exit;
pub fn main(args: Vec<String>) {
Logger::set_log_level(LogLevel::Debug);
let app = App::new("citadel-realmfs")
.about("Citadel realmfs image tool")
.settings(&[ArgRequiredElseHelp,ColoredHelp, DisableHelpSubcommand, DisableVersion, DeriveDisplayOrder,SubcommandsNegateReqs])
.subcommand(SubCommand::with_name("resize")
.about("Resize an existing RealmFS image. If the image is currently sealed, it will also be unsealed.")
.arg(Arg::with_name("image")
.help("Path or name of RealmFS image to resize")
.required(true))
.arg(Arg::with_name("size")
.help("Size to increase RealmFS image to (or by if prefixed with '+')")
.long_help("\
The size can be followed by a 'g' or 'm' character \
to indicate a quantity of gigabytes or megabytes. If no size unit \
is provided the size is measured in blocks (of 4096 bytes). \
\
If the size is prefixed with a '+' character it is understood \
as a quantity to increase the current size by. Otherwise the size \
is the final absolute size of the image.")
.required(true)))
.subcommand(SubCommand::with_name("fork")
.about("Create a new RealmFS image as an unsealed copy of an existing image")
.arg(Arg::with_name("image")
.help("Path or name of RealmFS image to fork")
.required(true))
.arg(Arg::with_name("forkname")
.help("Name of new image to create")
.required(true)))
.subcommand(SubCommand::with_name("seal")
.about("Seal an unsealed RealmFS image")
.arg(Arg::with_name("image")
.help("Path or name of RealmFS image to seal")
.required(true)))
.subcommand(SubCommand::with_name("autoresize")
.about("Increase size of RealmFS image if not enough free space remains")
.arg(Arg::with_name("image")
.help("Path or name of RealmFS image")
.required(true)))
.subcommand(SubCommand::with_name("update")
.about("Open an update shell on the image")
.arg(Arg::with_name("image")
.help("Path or name of RealmFS image")
.required(true)))
.subcommand(SubCommand::with_name("activate")
.about("Activate a RealmFS by creating a block device for the image and mounting it.")
.arg(Arg::with_name("image")
.help("Path or name of RealmFS image to activate")
.required(true)))
.subcommand(SubCommand::with_name("deactivate")
.about("Deactivate a RealmFS by unmounting it and removing block device created during activation.")
.arg(Arg::with_name("image")
.help("Path or name of RealmFS image to deactivate")
.required(true)))
.arg(Arg::with_name("image")
.help("Name of or path to RealmFS image to display information about")
.required(true));
let matches = app.get_matches_from(args);
let result = match matches.subcommand() {
("resize", Some(m)) => resize(m),
("autoresize", Some(m)) => autoresize(m),
("fork", Some(m)) => fork(m),
("seal", Some(m)) => seal(m),
("update", Some(m)) => update(m),
("activate", Some(m)) => activate(m),
("deactivate", Some(m)) => deactivate(m),
_ => image_info(&matches),
};
if let Err(ref e) = result {
eprintln!("Error: {}", format_error(e));
exit(1);
}
}
fn realmfs_image(arg_matches: &ArgMatches) -> Result<RealmFS> {
let image = match arg_matches.value_of("image") {
Some(s) => s,
None => bail!("Image argument required."),
};
let realmfs = if RealmFS::is_valid_name(image) {
RealmFS::load_by_name(image)?
} else if RealmFS::is_valid_realmfs_image(image) {
RealmFS::load_from_path(image)?
} else {
bail!("Not a valid realmfs name or path to realmfs image file: {}", image);
};
Ok(realmfs)
}
fn image_info(arg_matches: &ArgMatches) -> Result<()> {
let img = realmfs_image(arg_matches)?;
print!("{}", String::from_utf8(img.header().metainfo_bytes())?);
Ok(())
}
fn parse_resize_size(s: &str) -> Result<ResizeSize> {
let unit = s.chars().last().filter(|c| c.is_alphabetic());
let skip = if s.starts_with("+") { 1 } else { 0 };
let size = s.chars()
.skip(skip)
.take_while(|c| c.is_numeric())
.collect::<String>()
.parse::<usize>()
.map_err(|_| format_err!("Unable to parse size value '{}'",s))?;
match unit {
Some('g') | Some('G') => Ok(ResizeSize::gigs(size)),
Some('m') | Some('M') => Ok(ResizeSize::megs(size)),
Some(c) => Err(format_err!("Unknown size unit '{}'", c)),
None => Ok(ResizeSize::blocks(size)),
}
}
fn resize(arg_matches: &ArgMatches) -> Result<()> {
let img = realmfs_image(arg_matches)?;
info!("image is {}", img.path().display());
let size_arg = match arg_matches.value_of("size") {
Some(size) => size,
None => "No size argument",
};
info!("Size is {}", size_arg);
let mode_add = size_arg.starts_with("+");
let size = parse_resize_size(size_arg)?;
if mode_add {
img.resize_grow_by(size)
} else {
img.resize_grow_to(size)
}
}
fn autoresize(arg_matches: &ArgMatches) -> Result<()> {
let img = realmfs_image(arg_matches)?;
if let Some(size) = img.auto_resize_size() {
img.resize_grow_to(size)
} else {
info!("RealmFS image {} has sufficient free space, doing nothing", img.path().display());
Ok(())
}
}
fn fork(arg_matches: &ArgMatches) -> Result<()> {
let img = realmfs_image(arg_matches)?;
let forkname = match arg_matches.value_of("forkname") {
Some(name) => name,
None => bail!("No fork name argument"),
};
if !RealmFS::is_valid_name(forkname) {
bail!("Not a valid RealmFS image name '{}'", forkname);
}
if RealmFS::named_image_exists(forkname) {
bail!("A RealmFS image named '{}' already exists", forkname);
}
img.fork(forkname)?;
Ok(())
}
fn seal(arg_matches: &ArgMatches) -> Result<()> {
let img = realmfs_image(arg_matches)?;
let img_arg = arg_matches.value_of("image").unwrap();
if img.is_sealed() {
info!("RealmFS image {} is already sealed", img_arg);
} else if img.is_activated() {
info!("RealmFS image {} cannot be sealed because it is currently activated", img_arg);
} else {
img.seal(None)?;
}
Ok(())
}
fn update(arg_matches: &ArgMatches) -> Result<()> {
let img = realmfs_image(arg_matches)?;
let mut update = img.update();
update.setup()?;
update.open_update_shell()?;
update.apply_update()?;
update.cleanup()?;
Ok(())
}
fn activate(arg_matches: &ArgMatches) -> Result<()> {
let img = realmfs_image(arg_matches)?;
let img_arg = arg_matches.value_of("image").unwrap();
let activation = if let Some(activation) = img.activation() {
info!("RealmFS image {} is already activated", img_arg);
activation
} else {
info!("Activating {}", img_arg);
img.activate()?
};
info!("Read-Only mountpoint: {}", activation.mountpoint());
if let Some(rw) = activation.mountpoint_rw() {
info!("Read-Write mountpoint: {}", rw);
}
Ok(())
}
fn deactivate(arg_matches: &ArgMatches) -> Result<()> {
let img = realmfs_image(arg_matches)?;
let img_arg = arg_matches.value_of("image").unwrap();
if !img.is_activated() {
info!("RealmFS image {} is not activated", img_arg);
} else if img.is_in_use() {
info!("Cannot deactivate RealmFS image {} because it is currently in use", img_arg);
} else {
info!("Deactivating {}", img_arg);
img.deactivate()?;
}
Ok(())
}