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120 lines
3.6 KiB
C++
120 lines
3.6 KiB
C++
//===--- CommandLine.cpp - OS-specific command line arguments -------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// OS-specific command line argument handling is defined here.
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//
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//===----------------------------------------------------------------------===//
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#include <vector>
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#include <string>
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#include <cassert>
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#include <climits>
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#include <cstdarg>
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#include <cstdint>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include "swift/Runtime/Debug.h"
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#include "../SwiftShims/RuntimeStubs.h"
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#include "../SwiftShims/GlobalObjects.h"
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// Backing storage for overrides of `Swift.CommandLine.arguments`.
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static char **_swift_stdlib_ProcessOverrideUnsafeArgv = nullptr;
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static int _swift_stdlib_ProcessOverrideUnsafeArgc = 0;
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SWIFT_RUNTIME_STDLIB_INTERFACE
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extern "C" void _swift_stdlib_overrideUnsafeArgvArgc(char **argv, int argc) {
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_swift_stdlib_ProcessOverrideUnsafeArgv = argv;
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_swift_stdlib_ProcessOverrideUnsafeArgc = argc;
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}
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#if defined(__APPLE__)
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// NOTE: forward declare this rather than including crt_externs.h as not all
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// SDKs provide it
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extern "C" char ***_NSGetArgv(void);
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extern "C" int *_NSGetArgc(void);
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SWIFT_RUNTIME_STDLIB_INTERFACE
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extern "C" char ** _swift_stdlib_getUnsafeArgvArgc(int *outArgLen) {
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assert(outArgLen != nullptr);
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if (_swift_stdlib_ProcessOverrideUnsafeArgv) {
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*outArgLen = _swift_stdlib_ProcessOverrideUnsafeArgc;
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return _swift_stdlib_ProcessOverrideUnsafeArgv;
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}
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*outArgLen = *_NSGetArgc();
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return *_NSGetArgv();
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}
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#elif defined(__linux__) || defined(__CYGWIN__) || defined(__FreeBSD__)
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SWIFT_RUNTIME_STDLIB_INTERFACE
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extern "C" char ** _swift_stdlib_getUnsafeArgvArgc(int *outArgLen) {
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assert(outArgLen != nullptr);
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if (_swift_stdlib_ProcessOverrideUnsafeArgv) {
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*outArgLen = _swift_stdlib_ProcessOverrideUnsafeArgc;
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return _swift_stdlib_ProcessOverrideUnsafeArgv;
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}
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FILE *cmdline = fopen("/proc/self/cmdline", "rb");
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if (!cmdline) {
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swift::fatalError(0,
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"fatal error: Unable to open interface to '/proc/self/cmdline'.\n");
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}
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char *arg = nullptr;
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size_t size = 0;
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std::vector<char *> argvec;
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while (getdelim(&arg, &size, 0, cmdline) != -1) {
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argvec.push_back(strdup(arg));
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}
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if (arg) {
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free(arg);
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}
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fclose(cmdline);
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*outArgLen = argvec.size();
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char **outBuf = (char **)calloc(argvec.size() + 1, sizeof(char *));
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std::copy(argvec.begin(), argvec.end(), outBuf);
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outBuf[argvec.size()] = nullptr;
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return outBuf;
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}
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#elif defined (_WIN32)
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#include <stdlib.h>
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SWIFT_RUNTIME_STDLIB_INTERFACE
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extern "C" char ** _swift_stdlib_getUnsafeArgvArgc(int *outArgLen) {
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assert(outArgLen != nullptr);
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if (_swift_stdlib_ProcessOverrideUnsafeArgv) {
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*outArgLen = _swift_stdlib_ProcessOverrideUnsafeArgc;
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return _swift_stdlib_ProcessOverrideUnsafeArgv;
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}
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*outArgLen = __argc;
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return __argv;
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}
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#else // __ANDROID__; Add your favorite arch's command line arg grabber here.
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SWIFT_RUNTIME_STDLIB_INTERFACE
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extern "C" char ** _swift_stdlib_getUnsafeArgvArgc(int *outArgLen) {
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if (_swift_stdlib_ProcessOverrideUnsafeArgv) {
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*outArgLen = _swift_stdlib_ProcessOverrideUnsafeArgc;
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return _swift_stdlib_ProcessOverrideUnsafeArgv;
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}
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swift::fatalError(0,
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"fatal error: Command line arguments not supported on this platform.\n");
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}
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#endif
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