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