52 lines
1.4 KiB
Rust
52 lines
1.4 KiB
Rust
use std::{env, process};
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use wasi::wasi_unstable;
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use wasi_misc_tests::open_scratch_directory;
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use wasi_misc_tests::utils::cleanup_file;
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use wasi_misc_tests::wasi_wrappers::{wasi_path_readlink, wasi_path_symlink};
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unsafe fn test_readlink_no_buffer(dir_fd: wasi_unstable::Fd) {
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// First create a dangling symlink.
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assert!(
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wasi_path_symlink("target", dir_fd, "symlink").is_ok(),
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"creating a symlink"
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);
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// Readlink it into a non-existent buffer.
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let mut bufused: usize = 1;
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let status = wasi_path_readlink(dir_fd, "symlink", &mut [], &mut bufused);
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assert_eq!(
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status,
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wasi_unstable::raw::__WASI_ESUCCESS,
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"readlink with a 0-sized buffer should succeed"
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);
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assert_eq!(
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bufused, 0,
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"readlink with a 0-sized buffer should return 'bufused' 0"
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);
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// Clean up.
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cleanup_file(dir_fd, "symlink");
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}
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fn main() {
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let mut args = env::args();
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let prog = args.next().unwrap();
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let arg = if let Some(arg) = args.next() {
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arg
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} else {
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eprintln!("usage: {} <scratch directory>", prog);
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process::exit(1);
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};
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// Open scratch directory
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let dir_fd = match open_scratch_directory(&arg) {
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Ok(dir_fd) => dir_fd,
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Err(err) => {
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eprintln!("{}", err);
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process::exit(1)
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}
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};
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// Run the tests.
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unsafe { test_readlink_no_buffer(dir_fd) }
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}
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