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Diffstat (limited to '')
-rw-r--r-- | dependencies/pkg/mod/golang.org/x/sys@v0.1.0/windows/exec_windows.go | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/windows/exec_windows.go b/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/windows/exec_windows.go new file mode 100644 index 0000000..75980fd --- /dev/null +++ b/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/windows/exec_windows.go @@ -0,0 +1,178 @@ +// 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. + +// Fork, exec, wait, etc. + +package windows + +import ( + errorspkg "errors" + "unsafe" +) + +// EscapeArg rewrites command line argument s as prescribed +// in http://msdn.microsoft.com/en-us/library/ms880421. +// This function returns "" (2 double quotes) if s is empty. +// Alternatively, these transformations are done: +// - every back slash (\) is doubled, but only if immediately +// followed by double quote ("); +// - every double quote (") is escaped by back slash (\); +// - finally, s is wrapped with double quotes (arg -> "arg"), +// but only if there is space or tab inside s. +func EscapeArg(s string) string { + if len(s) == 0 { + return "\"\"" + } + n := len(s) + hasSpace := false + for i := 0; i < len(s); i++ { + switch s[i] { + case '"', '\\': + n++ + case ' ', '\t': + hasSpace = true + } + } + if hasSpace { + n += 2 + } + if n == len(s) { + return s + } + + qs := make([]byte, n) + j := 0 + if hasSpace { + qs[j] = '"' + j++ + } + slashes := 0 + for i := 0; i < len(s); i++ { + switch s[i] { + default: + slashes = 0 + qs[j] = s[i] + case '\\': + slashes++ + qs[j] = s[i] + case '"': + for ; slashes > 0; slashes-- { + qs[j] = '\\' + j++ + } + qs[j] = '\\' + j++ + qs[j] = s[i] + } + j++ + } + if hasSpace { + for ; slashes > 0; slashes-- { + qs[j] = '\\' + j++ + } + qs[j] = '"' + j++ + } + return string(qs[:j]) +} + +// ComposeCommandLine escapes and joins the given arguments suitable for use as a Windows command line, +// in CreateProcess's CommandLine argument, CreateService/ChangeServiceConfig's BinaryPathName argument, +// or any program that uses CommandLineToArgv. +func ComposeCommandLine(args []string) string { + var commandLine string + for i := range args { + if i > 0 { + commandLine += " " + } + commandLine += EscapeArg(args[i]) + } + return commandLine +} + +// DecomposeCommandLine breaks apart its argument command line into unescaped parts using CommandLineToArgv, +// as gathered from GetCommandLine, QUERY_SERVICE_CONFIG's BinaryPathName argument, or elsewhere that +// command lines are passed around. +func DecomposeCommandLine(commandLine string) ([]string, error) { + if len(commandLine) == 0 { + return []string{}, nil + } + var argc int32 + argv, err := CommandLineToArgv(StringToUTF16Ptr(commandLine), &argc) + if err != nil { + return nil, err + } + defer LocalFree(Handle(unsafe.Pointer(argv))) + var args []string + for _, v := range (*argv)[:argc] { + args = append(args, UTF16ToString((*v)[:])) + } + return args, nil +} + +func CloseOnExec(fd Handle) { + SetHandleInformation(Handle(fd), HANDLE_FLAG_INHERIT, 0) +} + +// FullPath retrieves the full path of the specified file. +func FullPath(name string) (path string, err error) { + p, err := UTF16PtrFromString(name) + if err != nil { + return "", err + } + n := uint32(100) + for { + buf := make([]uint16, n) + n, err = GetFullPathName(p, uint32(len(buf)), &buf[0], nil) + if err != nil { + return "", err + } + if n <= uint32(len(buf)) { + return UTF16ToString(buf[:n]), nil + } + } +} + +// NewProcThreadAttributeList allocates a new ProcThreadAttributeListContainer, with the requested maximum number of attributes. +func NewProcThreadAttributeList(maxAttrCount uint32) (*ProcThreadAttributeListContainer, error) { + var size uintptr + err := initializeProcThreadAttributeList(nil, maxAttrCount, 0, &size) + if err != ERROR_INSUFFICIENT_BUFFER { + if err == nil { + return nil, errorspkg.New("unable to query buffer size from InitializeProcThreadAttributeList") + } + return nil, err + } + alloc, err := LocalAlloc(LMEM_FIXED, uint32(size)) + if err != nil { + return nil, err + } + // size is guaranteed to be ≥1 by InitializeProcThreadAttributeList. + al := &ProcThreadAttributeListContainer{data: (*ProcThreadAttributeList)(unsafe.Pointer(alloc))} + err = initializeProcThreadAttributeList(al.data, maxAttrCount, 0, &size) + if err != nil { + return nil, err + } + return al, err +} + +// Update modifies the ProcThreadAttributeList using UpdateProcThreadAttribute. +func (al *ProcThreadAttributeListContainer) Update(attribute uintptr, value unsafe.Pointer, size uintptr) error { + al.pointers = append(al.pointers, value) + return updateProcThreadAttribute(al.data, 0, attribute, value, size, nil, nil) +} + +// Delete frees ProcThreadAttributeList's resources. +func (al *ProcThreadAttributeListContainer) Delete() { + deleteProcThreadAttributeList(al.data) + LocalFree(Handle(unsafe.Pointer(al.data))) + al.data = nil + al.pointers = nil +} + +// List returns the actual ProcThreadAttributeList to be passed to StartupInfoEx. +func (al *ProcThreadAttributeListContainer) List() *ProcThreadAttributeList { + return al.data +} |