8464474e21
This adds `gojs.WithOSUser` which passes through current user IDs so that GOOS=js compiled wasm can read them. This also adds support for reading back the uid and gid on files. In summary, this passes `os.TestChown` except on windows where it will not work due to lack of support. Signed-off-by: Adrian Cole <adrian@tetrate.io>
60 lines
1.1 KiB
Go
60 lines
1.1 KiB
Go
package fs
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import (
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"bytes"
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"fmt"
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"io"
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"log"
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"os"
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)
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func Main() {
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testAdHoc()
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}
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func testAdHoc() {
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// Ensure stat works, particularly mode.
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for _, path := range []string{"sub", "/animals.txt", "animals.txt"} {
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if stat, err := os.Stat(path); err != nil {
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log.Panicln(err)
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} else {
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fmt.Println(path, "mode", stat.Mode())
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}
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}
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// Read the full contents of the file using io.Reader
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b, err := os.ReadFile("/animals.txt")
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if err != nil {
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log.Panicln(err)
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}
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fmt.Println("contents:", string(b))
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// Re-open the same file to test io.ReaderAt
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f, err := os.Open("/animals.txt")
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if err != nil {
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log.Panicln(err)
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}
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defer f.Close()
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// Seek to an arbitrary position.
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if _, err = f.Seek(4, io.SeekStart); err != nil {
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log.Panicln(err)
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}
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b1 := make([]byte, len(b))
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// We expect to revert to the original position on ReadAt zero.
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if _, err = f.ReadAt(b1, 0); err != nil {
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log.Panicln(err)
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}
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if !bytes.Equal(b, b1) {
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log.Panicln("unexpected ReadAt contents: ", string(b1))
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}
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b, err = os.ReadFile("/empty.txt")
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if err != nil {
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log.Panicln(err)
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}
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fmt.Println("empty:" + string(b))
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}
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