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02/02/2024 06:09:55 PM
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dir.go
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dir_darwin.go
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dir_plan9.go
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dir_unix.go
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dir_windows.go
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dirent_aix.go
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dirent_dragonfly.go
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dirent_freebsd.go
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dirent_js.go
678 bytes
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dirent_linux.go
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dirent_netbsd.go
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dirent_openbsd.go
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dirent_solaris.go
759 bytes
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dirent_wasip1.go
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endian_big.go
244 bytes
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endian_little.go
304 bytes
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env.go
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env_test.go
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env_unix_test.go
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error.go
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error_errno.go
247 bytes
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error_plan9.go
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error_posix.go
538 bytes
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error_test.go
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error_unix_test.go
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error_windows_test.go
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example_test.go
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exec
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exec.go
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exec_plan9.go
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exec_posix.go
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exec_unix.go
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exec_unix_test.go
999 bytes
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exec_windows.go
4.57 KB
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exec_windows_test.go
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executable.go
774 bytes
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executable_darwin.go
613 bytes
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executable_dragonfly.go
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executable_freebsd.go
292 bytes
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executable_path.go
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executable_plan9.go
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executable_procfs.go
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executable_solaris.go
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executable_sysctl.go
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executable_test.go
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executable_wasm.go
333 bytes
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executable_windows.go
641 bytes
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export_linux_test.go
337 bytes
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export_test.go
433 bytes
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export_unix_test.go
241 bytes
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export_windows_test.go
395 bytes
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fifo_test.go
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file.go
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file_mutex_plan9.go
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file_open_unix.go
397 bytes
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file_open_wasip1.go
818 bytes
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file_plan9.go
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file_posix.go
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file_unix.go
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file_wasip1.go
633 bytes
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file_windows.go
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getwd.go
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os_test.go
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os_unix_test.go
11.47 KB
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os_windows_test.go
41.83 KB
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path.go
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path_plan9.go
492 bytes
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path_test.go
2.96 KB
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path_unix.go
1.56 KB
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path_windows.go
5.66 KB
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path_windows_test.go
4.03 KB
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pipe2_unix.go
640 bytes
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pipe_test.go
12.41 KB
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pipe_unix.go
760 bytes
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pipe_wasm.go
488 bytes
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proc.go
2.27 KB
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rawconn.go
993 bytes
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rawconn_test.go
1.15 KB
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read_test.go
3.2 KB
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readfrom_linux_test.go
20.3 KB
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removeall_at.go
4.91 KB
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removeall_noat.go
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removeall_test.go
11.96 KB
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signal
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02/02/2024 06:09:55 PM
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stat.go
965 bytes
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stat_aix.go
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stat_darwin.go
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stat_dragonfly.go
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stat_freebsd.go
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stat_js.go
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stat_linux.go
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stat_netbsd.go
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stat_openbsd.go
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stat_plan9.go
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stat_solaris.go
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stat_test.go
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stat_unix.go
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stat_wasip1.go
956 bytes
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stat_windows.go
4.93 KB
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sticky_bsd.go
425 bytes
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sticky_notbsd.go
320 bytes
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sys.go
294 bytes
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sys_aix.go
682 bytes
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sys_bsd.go
466 bytes
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sys_js.go
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sys_linux.go
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sys_plan9.go
453 bytes
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sys_solaris.go
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sys_unix.go
493 bytes
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sys_wasip1.go
309 bytes
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sys_windows.go
874 bytes
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tempfile.go
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tempfile_test.go
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testdata
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timeout_test.go
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types.go
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types_plan9.go
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types_unix.go
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types_windows.go
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user
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wait6_dragonfly.go
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wait6_freebsd64.go
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wait6_freebsd_386.go
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wait6_freebsd_arm.go
549 bytes
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wait6_netbsd.go
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wait_unimp.go
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wait_wait6.go
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wait_waitid.go
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writeto_linux_test.go
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zero_copy_linux.go
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zero_copy_stub.go
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Editing: error.go
Close
// Copyright 2009 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package os import ( "internal/poll" "io/fs" ) // Portable analogs of some common system call errors. // // Errors returned from this package may be tested against these errors // with errors.Is. var ( // ErrInvalid indicates an invalid argument. // Methods on File will return this error when the receiver is nil. ErrInvalid = fs.ErrInvalid // "invalid argument" ErrPermission = fs.ErrPermission // "permission denied" ErrExist = fs.ErrExist // "file already exists" ErrNotExist = fs.ErrNotExist // "file does not exist" ErrClosed = fs.ErrClosed // "file already closed" ErrNoDeadline = errNoDeadline() // "file type does not support deadline" ErrDeadlineExceeded = errDeadlineExceeded() // "i/o timeout" ) func errNoDeadline() error { return poll.ErrNoDeadline } // errDeadlineExceeded returns the value for os.ErrDeadlineExceeded. // This error comes from the internal/poll package, which is also // used by package net. Doing it this way ensures that the net // package will return os.ErrDeadlineExceeded for an exceeded deadline, // as documented by net.Conn.SetDeadline, without requiring any extra // work in the net package and without requiring the internal/poll // package to import os (which it can't, because that would be circular). func errDeadlineExceeded() error { return poll.ErrDeadlineExceeded } type timeout interface { Timeout() bool } // PathError records an error and the operation and file path that caused it. type PathError = fs.PathError // SyscallError records an error from a specific system call. type SyscallError struct { Syscall string Err error } func (e *SyscallError) Error() string { return e.Syscall + ": " + e.Err.Error() } func (e *SyscallError) Unwrap() error { return e.Err } // Timeout reports whether this error represents a timeout. func (e *SyscallError) Timeout() bool { t, ok := e.Err.(timeout) return ok && t.Timeout() } // NewSyscallError returns, as an error, a new SyscallError // with the given system call name and error details. // As a convenience, if err is nil, NewSyscallError returns nil. func NewSyscallError(syscall string, err error) error { if err == nil { return nil } return &SyscallError{syscall, err} } // IsExist returns a boolean indicating whether the error is known to report // that a file or directory already exists. It is satisfied by ErrExist as // well as some syscall errors. // // This function predates errors.Is. It only supports errors returned by // the os package. New code should use errors.Is(err, fs.ErrExist). func IsExist(err error) bool { return underlyingErrorIs(err, ErrExist) } // IsNotExist returns a boolean indicating whether the error is known to // report that a file or directory does not exist. It is satisfied by // ErrNotExist as well as some syscall errors. // // This function predates errors.Is. It only supports errors returned by // the os package. New code should use errors.Is(err, fs.ErrNotExist). func IsNotExist(err error) bool { return underlyingErrorIs(err, ErrNotExist) } // IsPermission returns a boolean indicating whether the error is known to // report that permission is denied. It is satisfied by ErrPermission as well // as some syscall errors. // // This function predates errors.Is. It only supports errors returned by // the os package. New code should use errors.Is(err, fs.ErrPermission). func IsPermission(err error) bool { return underlyingErrorIs(err, ErrPermission) } // IsTimeout returns a boolean indicating whether the error is known // to report that a timeout occurred. // // This function predates errors.Is, and the notion of whether an // error indicates a timeout can be ambiguous. For example, the Unix // error EWOULDBLOCK sometimes indicates a timeout and sometimes does not. // New code should use errors.Is with a value appropriate to the call // returning the error, such as os.ErrDeadlineExceeded. func IsTimeout(err error) bool { terr, ok := underlyingError(err).(timeout) return ok && terr.Timeout() } func underlyingErrorIs(err, target error) bool { // Note that this function is not errors.Is: // underlyingError only unwraps the specific error-wrapping types // that it historically did, not all errors implementing Unwrap(). err = underlyingError(err) if err == target { return true } // To preserve prior behavior, only examine syscall errors. e, ok := err.(syscallErrorType) return ok && e.Is(target) } // underlyingError returns the underlying error for known os error types. func underlyingError(err error) error { switch err := err.(type) { case *PathError: return err.Err case *LinkError: return err.Err case *SyscallError: return err.Err } return err }