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[5.9.1] Cherry-pick Fix divergent overwrite behavior of FileManager.copyItem(at:to:) on Linux and Windows #4834

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[5.9.1] Cherry-pick Fix divergent overwrite behavior of FileManager.copyItem(at:to:) on Linux and Windows #4834

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8c63b5d
Fix silent-overwrite behavior of FileManager.copyItem() on Linux
gwynne Sep 16, 2023
03ca770
Fix silent-overwrite behavior of FileManager.copyItem() on Windows
gwynne Sep 16, 2023
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2 changes: 1 addition & 1 deletion Sources/Foundation/FileManager+POSIX.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -584,7 +584,7 @@ extension FileManager {
}
defer { close(srcfd) }

let dstfd = open(dstRep, O_WRONLY | O_CREAT | O_TRUNC, 0o666)
let dstfd = open(dstRep, O_WRONLY | O_CREAT | O_EXCL | O_TRUNC, 0o666)
guard dstfd >= 0 else {
throw _NSErrorWithErrno(errno, reading: false, path: dstPath,
extraUserInfo: extraErrorInfo(srcPath: srcPath, dstPath: dstPath, userVariant: variant))
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2 changes: 1 addition & 1 deletion Sources/Foundation/FileManager+Win32.swift
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Expand Up @@ -476,7 +476,7 @@ extension FileManager {

internal func _copyRegularFile(atPath srcPath: String, toPath dstPath: String, variant: String = "Copy") throws {
try FileManager.default._fileSystemRepresentation(withPath: srcPath, andPath: dstPath) {
if !CopyFileW($0, $1, false) {
if !CopyFileW($0, $1, true) {
throw _NSErrorWithWindowsError(GetLastError(), reading: true, paths: [srcPath, dstPath])
}
}
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