f7f10c12b3
* Fix path_open granting more rights than requested * Add missing rights checks in: fd_fdstat_set_flags, fd_filestat_get, poll_oneoff * Fix `open_scratch_directory` not requesting any rights. * Properly request needed rights in various tests * Add some extra trace-level logging * Remove a no-op restriction of rights to the ones returned by `determine_type_rights`. It was redundant, because `FdEntry:from` internally also called `determine_type_rights` and only dropped some of them.
93 lines
2.8 KiB
Rust
93 lines
2.8 KiB
Rust
use more_asserts::assert_gt;
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use std::{env, process};
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use wasi_tests::open_scratch_directory;
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unsafe fn test_file_seek_tell(dir_fd: wasi::Fd) {
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// Create a file in the scratch directory.
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let file_fd = wasi::path_open(
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dir_fd,
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0,
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"file",
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wasi::OFLAGS_CREAT,
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wasi::RIGHTS_FD_READ | wasi::RIGHTS_FD_WRITE | wasi::RIGHTS_FD_SEEK | wasi::RIGHTS_FD_TELL,
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0,
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0,
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)
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.expect("opening a file");
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assert_gt!(
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file_fd,
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libc::STDERR_FILENO as wasi::Fd,
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"file descriptor range check",
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);
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// Check current offset
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let mut offset = wasi::fd_tell(file_fd).expect("getting initial file offset");
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assert_eq!(offset, 0, "current offset should be 0");
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// Write to file
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let buf = &[0u8; 100];
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let iov = wasi::Ciovec {
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buf: buf.as_ptr() as *const _,
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buf_len: buf.len(),
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};
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let nwritten = wasi::fd_write(file_fd, &[iov]).expect("writing to a file");
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assert_eq!(nwritten, 100, "should write 100 bytes to file");
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// Check current offset
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offset = wasi::fd_tell(file_fd).expect("getting file offset after writing");
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assert_eq!(offset, 100, "offset after writing should be 100");
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// Seek to middle of the file
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let mut newoffset =
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wasi::fd_seek(file_fd, -50, wasi::WHENCE_CUR).expect("seeking to the middle of a file");
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assert_eq!(
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newoffset, 50,
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"offset after seeking to the middle should be at 50"
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);
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// Seek to the beginning of the file
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newoffset =
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wasi::fd_seek(file_fd, 0, wasi::WHENCE_SET).expect("seeking to the beginning of the file");
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assert_eq!(
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newoffset, 0,
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"offset after seeking to the beginning of the file should be at 0"
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);
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// Seek beyond the file should be possible
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wasi::fd_seek(file_fd, 1000, wasi::WHENCE_CUR).expect("seeking beyond the end of the file");
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// Seek before byte 0 is an error though
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assert_eq!(
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wasi::fd_seek(file_fd, -2000, wasi::WHENCE_CUR)
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.expect_err("seeking before byte 0 should be an error")
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.raw_error(),
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wasi::ERRNO_INVAL,
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"errno should be ERRNO_INVAL",
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);
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wasi::fd_close(file_fd).expect("closing a file");
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wasi::path_unlink_file(dir_fd, "file").expect("deleting a file");
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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_file_seek_tell(dir_fd) }
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}
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