mirror of
https://github.com/uutils/coreutils
synced 2024-12-13 14:52:41 +00:00
install: implement -C / --compare (#1811)
* install: implement `-C` / `--compare` GNU coreutils [1] checks the following: whether - either file is nonexistent, - there's a sticky bit or set[ug]id bit in play, - either file isn't a regular file, - the sizes of both files mismatch, - the destination file's owner differs from intended, or - the contents of both files mismatch. [1] https://git.savannah.gnu.org/cgit/coreutils.git/tree/src/install.c?h=v8.32#n174 * Add test: non-regular files * Forgot a #[test] * Give up on non-regular file test * `cargo fmt` install.rs
This commit is contained in:
Antonio Gurgel
GitHub
parent
3ae714e88c
commit
35675fdfe7
5 changed files with 197 additions and 5 deletions
20
Cargo.lock
generated
20
Cargo.lock
generated
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@ -187,6 +187,7 @@ dependencies = [
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"glob 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.85 (registry+https://github.com/rust-lang/crates.io-index)",
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"nix 0.20.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"rand 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
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"regex 1.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
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"sha1 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -517,6 +518,11 @@ name = "fake-simd"
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version = "0.1.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "file_diff"
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version = "1.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "filetime"
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version = "0.2.14"
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@ -730,6 +736,17 @@ dependencies = [
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"void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "nix"
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version = "0.20.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"cc 1.0.61 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.85 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "nodrop"
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version = "0.1.14"
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@ -1658,6 +1675,7 @@ name = "uu_install"
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version = "0.0.4"
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dependencies = [
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"clap 2.33.3 (registry+https://github.com/rust-lang/crates.io-index)",
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"file_diff 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"filetime 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.85 (registry+https://github.com/rust-lang/crates.io-index)",
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"time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -2501,6 +2519,7 @@ dependencies = [
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"checksum either 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
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"checksum env_logger 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "44533bbbb3bb3c1fa17d9f2e4e38bbbaf8396ba82193c4cb1b6445d711445d36"
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"checksum fake-simd 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e88a8acf291dafb59c2d96e8f59828f3838bb1a70398823ade51a84de6a6deed"
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"checksum file_diff 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "31a7a908b8f32538a2143e59a6e4e2508988832d5d4d6f7c156b3cbc762643a5"
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"checksum filetime 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)" = "1d34cfa13a63ae058bfa601fe9e313bbdb3746427c1459185464ce0fcf62e1e8"
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"checksum fnv 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)" = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
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"checksum fs_extra 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2022715d62ab30faffd124d40b76f4134a550a87792276512b18d63272333394"
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@ -2532,6 +2551,7 @@ dependencies = [
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"checksum memchr 2.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
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"checksum memoffset 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "157b4208e3059a8f9e78d559edc658e13df41410cb3ae03979c83130067fdd87"
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"checksum nix 0.13.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4dbdc256eaac2e3bd236d93ad999d3479ef775c863dbda3068c4006a92eec51b"
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"checksum nix 0.20.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fa9b4819da1bc61c0ea48b63b7bc8604064dd43013e7cc325df098d49cd7c18a"
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"checksum nodrop 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)" = "72ef4a56884ca558e5ddb05a1d1e7e1bfd9a68d9ed024c21704cc98872dae1bb"
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"checksum num-integer 0.1.44 (registry+https://github.com/rust-lang/crates.io-index)" = "d2cc698a63b549a70bc047073d2949cce27cd1c7b0a4a862d08a8031bc2801db"
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"checksum num-traits 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)" = "9a64b1ec5cda2586e284722486d802acf1f7dbdc623e2bfc57e65ca1cd099290"
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@ -334,6 +334,7 @@ conv = "0.3"
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filetime = "0.2"
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glob = "0.3.0"
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libc = "0.2"
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nix = "0.20.0"
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rand = "0.7"
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regex = "1.0"
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sha1 = { version="0.6", features=["std"] }
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@ -20,6 +20,7 @@ path = "src/install.rs"
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[dependencies]
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clap = "2.33"
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filetime = "0.2"
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file_diff = "1.0.0"
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libc = ">= 0.2"
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uucore = { version=">=0.0.7", package="uucore", path="../../uucore", features=["mode", "perms", "entries"] }
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uucore_procs = { version=">=0.0.5", package="uucore_procs", path="../../uucore_procs" }
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@ -13,10 +13,12 @@ mod mode;
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extern crate uucore;
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use clap::{App, Arg, ArgMatches};
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use file_diff::diff;
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use filetime::{set_file_times, FileTime};
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use uucore::entries::{grp2gid, usr2uid};
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use uucore::perms::{wrap_chgrp, wrap_chown, Verbosity};
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use libc::{getegid, geteuid};
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use std::fs;
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use std::fs::File;
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use std::os::unix::fs::MetadataExt;
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@ -34,6 +36,7 @@ pub struct Behavior {
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group: String,
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verbose: bool,
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preserve_timestamps: bool,
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compare: bool,
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}
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#[derive(Clone, Eq, PartialEq)]
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@ -112,11 +115,10 @@ pub fn uumain(args: impl uucore::Args) -> i32 {
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.help("ignored")
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)
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.arg(
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// TODO implement flag
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Arg::with_name(OPT_COMPARE)
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.short("C")
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.long(OPT_COMPARE)
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.help("(unimplemented) compare each pair of source and destination files, and in some cases, do not modify the destination at all")
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.help("compare each pair of source and destination files, and in some cases, do not modify the destination at all")
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)
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.arg(
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Arg::with_name(OPT_DIRECTORY)
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@ -262,8 +264,6 @@ fn check_unimplemented<'a>(matches: &ArgMatches) -> Result<(), &'a str> {
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Err("--backup")
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} else if matches.is_present(OPT_BACKUP_2) {
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Err("-b")
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} else if matches.is_present(OPT_COMPARE) {
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Err("--compare, -C")
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} else if matches.is_present(OPT_CREATED) {
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Err("-D")
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} else if matches.is_present(OPT_STRIP) {
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@ -338,6 +338,7 @@ fn behavior(matches: &ArgMatches) -> Result<Behavior, i32> {
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group: matches.value_of(OPT_GROUP).unwrap_or("").to_string(),
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verbose: matches.is_present(OPT_VERBOSE),
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preserve_timestamps: matches.is_present(OPT_PRESERVE_TIMESTAMPS),
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compare: matches.is_present(OPT_COMPARE),
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})
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}
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@ -500,7 +501,13 @@ fn copy(from: &PathBuf, to: &PathBuf, b: &Behavior) -> Result<(), ()> {
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);
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return Err(());
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}
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} else if let Err(err) = fs::copy(from, to) {
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}
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if b.compare && !need_copy(from, to, b) {
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return Ok(());
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}
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if let Err(err) = fs::copy(from, to) {
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show_error!(
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"cannot install '{}' to '{}': {}",
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from.display(),
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@ -583,3 +590,81 @@ fn copy(from: &PathBuf, to: &PathBuf, b: &Behavior) -> Result<(), ()> {
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Ok(())
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}
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/// Return true if a file is necessary to copy. This is the case when:
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/// - _from_ or _to_ is nonexistent;
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/// - either file has a sticky bit or set[ug]id bit, or the user specified one;
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/// - either file isn't a regular file;
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/// - the sizes of _from_ and _to_ differ;
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/// - _to_'s owner differs from intended; or
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/// - the contents of _from_ and _to_ differ.
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///
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/// # Parameters
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///
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/// _from_ and _to_, if existent, must be non-directories.
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///
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/// # Errors
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///
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/// Crashes the program if a nonexistent owner or group is specified in _b_.
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///
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fn need_copy(from: &PathBuf, to: &PathBuf, b: &Behavior) -> bool {
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let from_meta = match fs::metadata(from) {
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Ok(meta) => meta,
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Err(_) => return true,
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};
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let to_meta = match fs::metadata(to) {
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Ok(meta) => meta,
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Err(_) => return true,
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};
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// setuid || setgid || sticky
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let extra_mode: u32 = 0o7000;
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if b.specified_mode.unwrap_or(0) & extra_mode != 0
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|| from_meta.mode() & extra_mode != 0
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|| to_meta.mode() & extra_mode != 0
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{
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return true;
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}
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if !from_meta.is_file() || !to_meta.is_file() {
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return true;
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}
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if from_meta.len() != to_meta.len() {
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return true;
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}
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// TODO: if -P (#1809) and from/to contexts mismatch, return true.
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if !b.owner.is_empty() {
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let owner_id = match usr2uid(&b.owner) {
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Ok(id) => id,
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_ => crash!(1, "no such user: {}", b.owner),
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};
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if owner_id != to_meta.uid() {
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return true;
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}
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} else if !b.group.is_empty() {
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let group_id = match grp2gid(&b.group) {
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Ok(id) => id,
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_ => crash!(1, "no such group: {}", b.group),
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};
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if group_id != to_meta.gid() {
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return true;
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}
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} else {
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#[cfg(not(target_os = "windows"))]
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unsafe {
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if to_meta.uid() != geteuid() || to_meta.gid() != getegid() {
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return true;
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}
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}
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}
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if !diff(from.to_str().unwrap(), to.to_str().unwrap()) {
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return true;
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}
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false
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}
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@ -1,4 +1,5 @@
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use crate::common::util::*;
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use filetime::FileTime;
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use rust_users::*;
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use std::os::unix::fs::PermissionsExt;
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@ -407,3 +408,87 @@ fn test_install_failing_no_such_file() {
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assert!(r.code == Some(1));
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assert!(r.stderr.contains("No such file or directory"));
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}
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#[test]
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fn test_install_copy_then_compare_file() {
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let scene = TestScenario::new(util_name!());
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let at = &scene.fixtures;
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let file1 = "test_install_copy_then_compare_file_a1";
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let file2 = "test_install_copy_then_compare_file_a2";
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at.touch(file1);
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scene
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.ucmd()
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.arg("-C")
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.arg(file1)
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.arg(file2)
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.succeeds()
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.no_stderr();
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let mut file2_meta = at.metadata(file2);
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let before = FileTime::from_last_modification_time(&file2_meta);
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scene
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.ucmd()
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.arg("-C")
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.arg(file1)
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.arg(file2)
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.succeeds()
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.no_stderr();
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file2_meta = at.metadata(file2);
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let after = FileTime::from_last_modification_time(&file2_meta);
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assert!(before == after);
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}
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#[test]
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#[cfg(target_os = "linux")]
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fn test_install_copy_then_compare_file_with_extra_mode() {
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let scene = TestScenario::new(util_name!());
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let at = &scene.fixtures;
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// XXX: can't tests introspect on their own names?
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let file1 = "test_install_copy_then_compare_file_with_extra_mode_a1";
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let file2 = "test_install_copy_then_compare_file_with_extra_mode_a2";
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at.touch(file1);
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scene
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.ucmd()
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.arg("-C")
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.arg(file1)
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.arg(file2)
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.succeeds()
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.no_stderr();
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let mut file2_meta = at.metadata(file2);
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let before = FileTime::from_last_modification_time(&file2_meta);
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scene
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.ucmd()
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.arg("-C")
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.arg(file1)
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.arg(file2)
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.arg("-m")
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.arg("1644")
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.succeeds()
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.no_stderr();
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file2_meta = at.metadata(file2);
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let after_install_sticky = FileTime::from_last_modification_time(&file2_meta);
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assert!(before != after_install_sticky);
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// dest file still 1644, so need_copy ought to return `true`
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scene
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.ucmd()
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.arg("-C")
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.arg(file1)
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.arg(file2)
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.succeeds()
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.no_stderr();
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file2_meta = at.metadata(file2);
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let after_install_sticky_again = FileTime::from_last_modification_time(&file2_meta);
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assert!(after_install_sticky != after_install_sticky_again);
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}
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Loading…
Reference in a new issue