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// Copyright 2023 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. //go:build unix package toolchain import ( "internal/syscall/unix" "io/fs" "os" "path/filepath" "syscall" "cmd/go/internal/gover" ) // pathDirs returns the directories in the system search path. func pathDirs() []string { return filepath.SplitList(os.Getenv("PATH")) } // pathVersion returns the Go version implemented by the file // described by de and info in directory dir. // The analysis only uses the name itself; it does not run the program. func pathVersion(dir string, de fs.DirEntry, info fs.FileInfo) (string, bool) { v := gover.FromToolchain(de.Name()) if v == "" { return "", false } // Mimicking exec.findExecutable here. // ENOSYS means Eaccess is not available or not implemented. // EPERM can be returned by Linux containers employing seccomp. // In both cases, fall back to checking the permission bits. err := unix.Eaccess(filepath.Join(dir, de.Name()), unix.X_OK) if (err == syscall.ENOSYS || err == syscall.EPERM) && info.Mode()&0111 != 0 { err = nil } if err != nil { return "", false } return v, true }
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