Add testcase for path_rename

src/bin/path_rename.rs

@@ -0,0 +1,232 @@
+use libc;
+use misc_tests::open_scratch_directory;
+use misc_tests::utils::{cleanup_dir, cleanup_file, close_fd, create_dir, create_file};
+use misc_tests::wasi::{wasi_path_open, wasi_path_rename};
+use std::{env, process};
+
+fn test_path_rename(dir_fd: libc::__wasi_fd_t) {
+    // First, try renaming a dir to nonexistent path
+    // Create source directory
+    create_dir(dir_fd, "source");
+
+    // Try renaming the directory
+    let mut status = wasi_path_rename(dir_fd, "source", dir_fd, "target");
+    assert_eq!(status, libc::__WASI_ESUCCESS, "renaming a directory");
+
+    // Check that source directory doesn't exist anymore
+    let mut fd: libc::__wasi_fd_t = libc::__wasi_fd_t::max_value() - 1;
+    status = wasi_path_open(
+        dir_fd,
+        0,
+        "source",
+        libc::__WASI_O_DIRECTORY,
+        0,
+        0,
+        0,
+        &mut fd,
+    );
+    assert_eq!(
+        status,
+        libc::__WASI_ENOENT,
+        "opening a nonexistent path as a directory"
+    );
+    assert_eq!(
+        fd,
+        libc::__wasi_fd_t::max_value(),
+        "failed open should set the file descriptor to -1",
+    );
+
+    // Check that target directory exists
+    status = wasi_path_open(
+        dir_fd,
+        0,
+        "target",
+        libc::__WASI_O_DIRECTORY,
+        0,
+        0,
+        0,
+        &mut fd,
+    );
+    assert_eq!(
+        status,
+        libc::__WASI_ESUCCESS,
+        "opening renamed path as a directory"
+    );
+    assert!(
+        fd > libc::STDERR_FILENO as libc::__wasi_fd_t,
+        "file descriptor range check",
+    );
+
+    close_fd(fd);
+    cleanup_dir(dir_fd, "target");
+
+    // Now, try renaming renaming a dir to existing empty dir
+    create_dir(dir_fd, "source");
+    create_dir(dir_fd, "target");
+
+    status = wasi_path_rename(dir_fd, "source", dir_fd, "target");
+    assert_eq!(status, libc::__WASI_ESUCCESS, "renaming a directory");
+
+    // Check that source directory doesn't exist anymore
+    fd = libc::__wasi_fd_t::max_value() - 1;
+    status = wasi_path_open(
+        dir_fd,
+        0,
+        "source",
+        libc::__WASI_O_DIRECTORY,
+        0,
+        0,
+        0,
+        &mut fd,
+    );
+    assert_eq!(
+        status,
+        libc::__WASI_ENOENT,
+        "opening a nonexistent path as a directory"
+    );
+    assert_eq!(
+        fd,
+        libc::__wasi_fd_t::max_value(),
+        "failed open should set the file descriptor to -1",
+    );
+
+    // Check that target directory exists
+    status = wasi_path_open(
+        dir_fd,
+        0,
+        "target",
+        libc::__WASI_O_DIRECTORY,
+        0,
+        0,
+        0,
+        &mut fd,
+    );
+    assert_eq!(
+        status,
+        libc::__WASI_ESUCCESS,
+        "opening renamed path as a directory"
+    );
+    assert!(
+        fd > libc::STDERR_FILENO as libc::__wasi_fd_t,
+        "file descriptor range check",
+    );
+
+    close_fd(fd);
+    cleanup_dir(dir_fd, "target");
+
+    // Now, try renaming a dir to existing non-empty dir
+    create_dir(dir_fd, "source");
+    create_dir(dir_fd, "target");
+    create_file(dir_fd, "target/file");
+
+    status = wasi_path_rename(dir_fd, "source", dir_fd, "target");
+    assert_eq!(
+        status,
+        libc::__WASI_ENOTEMPTY,
+        "renaming directory to a nonempty directory"
+    );
+
+    // Try renaming dir to a file
+    status = wasi_path_rename(dir_fd, "source", dir_fd, "target/file");
+    assert_eq!(status, libc::__WASI_ENOTDIR, "renaming directory to a file");
+
+    cleanup_file(dir_fd, "target/file");
+    cleanup_dir(dir_fd, "target");
+    cleanup_dir(dir_fd, "source");
+
+    // Now, try renaming a file to a nonexistent path
+    create_file(dir_fd, "source");
+
+    status = wasi_path_rename(dir_fd, "source", dir_fd, "target");
+    assert_eq!(status, libc::__WASI_ESUCCESS, "renaming a file");
+
+    // Check that source file doesn't exist anymore
+    fd = libc::__wasi_fd_t::max_value() - 1;
+    status = wasi_path_open(dir_fd, 0, "source", 0, 0, 0, 0, &mut fd);
+    assert_eq!(status, libc::__WASI_ENOENT, "opening a nonexistent path");
+    assert_eq!(
+        fd,
+        libc::__wasi_fd_t::max_value(),
+        "failed open should set the file descriptor to -1",
+    );
+
+    // Check that target file exists
+    status = wasi_path_open(dir_fd, 0, "target", 0, 0, 0, 0, &mut fd);
+    assert_eq!(status, libc::__WASI_ESUCCESS, "opening renamed path");
+    assert!(
+        fd > libc::STDERR_FILENO as libc::__wasi_fd_t,
+        "file descriptor range check",
+    );
+
+    close_fd(fd);
+    cleanup_file(dir_fd, "target");
+
+    // Now, try renaming file to an existing file
+    create_file(dir_fd, "source");
+    create_file(dir_fd, "target");
+
+    status = wasi_path_rename(dir_fd, "source", dir_fd, "target");
+    assert_eq!(
+        status,
+        libc::__WASI_ESUCCESS,
+        "renaming file to another existing file"
+    );
+
+    // Check that source file doesn't exist anymore
+    fd = libc::__wasi_fd_t::max_value() - 1;
+    status = wasi_path_open(dir_fd, 0, "source", 0, 0, 0, 0, &mut fd);
+    assert_eq!(status, libc::__WASI_ENOENT, "opening a nonexistent path");
+    assert_eq!(
+        fd,
+        libc::__wasi_fd_t::max_value(),
+        "failed open should set the file descriptor to -1",
+    );
+
+    // Check that target file exists
+    status = wasi_path_open(dir_fd, 0, "target", 0, 0, 0, 0, &mut fd);
+    assert_eq!(status, libc::__WASI_ESUCCESS, "opening renamed path");
+    assert!(
+        fd > libc::STDERR_FILENO as libc::__wasi_fd_t,
+        "file descriptor range check",
+    );
+
+    close_fd(fd);
+    cleanup_file(dir_fd, "target");
+
+    // Try renaming to an (empty) directory instead
+    create_file(dir_fd, "source");
+    create_dir(dir_fd, "target");
+
+    status = wasi_path_rename(dir_fd, "source", dir_fd, "target");
+    assert_eq!(
+        status,
+        libc::__WASI_EISDIR,
+        "renaming file to existing directory"
+    );
+
+    cleanup_dir(dir_fd, "target");
+    cleanup_file(dir_fd, "source");
+}
+
+fn main() {
+    let mut args = env::args();
+    let prog = args.next().unwrap();
+    let arg = if let Some(arg) = args.next() {
+        arg
+    } else {
+        eprintln!("usage: {} <scratch directory>", prog);
+        process::exit(1);
+    };
+
+    // Open scratch directory
+    let dir_fd = match open_scratch_directory(&arg) {
+        Ok(dir_fd) => dir_fd,
+        Err(err) => {
+            eprintln!("{}", err);
+            process::exit(1)
+        }
+    };
+
+    // Run the tests.
+    test_path_rename(dir_fd)
+}

src/wasi.rs

@@ -107,6 +107,24 @@ pub fn wasi_path_readlink(
     }
 }
 
+pub fn wasi_path_rename(
+    old_dirfd: libc::__wasi_fd_t,
+    old_path: &str,
+    new_dirfd: libc::__wasi_fd_t,
+    new_path: &str,
+) -> libc::__wasi_errno_t {
+    unsafe {
+        libc::__wasi_path_rename(
+            old_dirfd,
+            old_path.as_ptr() as *const _,
+            old_path.len(),
+            new_dirfd,
+            new_path.as_ptr() as *const _,
+            new_path.len(),
+        )
+    }
+}
+
 pub fn wasi_fd_fdstat_get(
     fd: libc::__wasi_fd_t,
     fdstat: &mut libc::__wasi_fdstat_t,