3609d74c92
This implements stat device and inode for WASI and GOOS=js, though it does not implement the host side for windows, yet. Doing windows requires plumbing as the values needed aren't exposed in Go. When we re-do the syscallfs file type to have a stat method, we can address that glitch. Meanwhile, I can find no Go sourcebase that does any better, though the closest is the implementation details of os.SameFile. I verified this with wasi-testsuite which now passes all but 1 case which is unrelated (we haven't yet implemented `lseek`). Signed-off-by: Adrian Cole <adrian@tetrate.io>
35 lines
1.0 KiB
Go
35 lines
1.0 KiB
Go
package platform
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import "os"
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// StatTimes returns platform-specific values if os.FileInfo Sys is available.
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// Otherwise, it returns the mod time for all values.
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func StatTimes(t os.FileInfo) (atimeNsec, mtimeNsec, ctimeNsec int64) {
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if t.Sys() == nil { // possibly fake filesystem
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return mtimes(t)
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}
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return statTimes(t)
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}
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// StatDeviceInode returns platform-specific values if os.FileInfo Sys is
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// available. Otherwise, it returns zero which makes file identity comparison
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// unsupported.
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//
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// Returning zero for now works in most cases, except notably wasi-libc
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// code that needs to compare file identity via the underlying data as
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// opposed to a host function similar to os.SameFile.
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// See https://github.com/WebAssembly/wasi-filesystem/issues/65
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func StatDeviceInode(t os.FileInfo) (dev, inode uint64) {
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if t.Sys() == nil { // possibly fake filesystem
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return
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}
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return statDeviceInode(t)
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}
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func mtimes(t os.FileInfo) (atimeNsec, mtimeNsec, ctimeNsec int64) {
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mtimeNsec = t.ModTime().UnixNano()
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atimeNsec = mtimeNsec
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ctimeNsec = mtimeNsec
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return
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}
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