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install: create destination file with safer modes before copy

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Chen Chen 2024-07-28 12:08:36 -05:00 • committed by Sylvestre Ledru
parent d6d6d02f00
commit a5867bdf34
2 changed files with 80 additions and 14 deletions
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38
tests/by-util/test_install.rs
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@ -1717,3 +1717,41 @@ fn test_install_root_combined() {
run_and_check(&["-Cv", "c", "d"], "d", 0, 0);
run_and_check(&["-Cv", "c", "d"], "d", 0, 0);
}
#[cfg(all(unix, feature = "chmod"))]
#[test]
fn test_install_copy_failures() {
let scene = TestScenario::new(util_name!());
let at = &scene.fixtures;
let file1 = "source_file";
let file2 = "target_file";
at.touch(file1);
scene.ccmd("chmod").arg("000").arg(file1).succeeds();
// if source file is not readable, it will raise a permission error.
// since we create the file with mode 0600 before `fs::copy`, if the
// copy failed, the file should be removed.
scene
.ucmd()
.arg(file1)
.arg(file2)
.arg("--mode=400")
.fails()
.stderr_contains("permission denied");
assert!(!at.file_exists(file2));
// if source file is good to copy, it should succeed and set the
// destination file permissions accordingly
scene.ccmd("chmod").arg("644").arg(file1).succeeds();
scene
.ucmd()
.arg(file1)
.arg(file2)
.arg("--mode=400")
.succeeds();
assert!(at.file_exists(file2));
assert_eq!(0o100_400_u32, at.metadata(file2).permissions().mode());
}