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zig/src/os.cpp
Andrew Kelley e3bf40742d
Merge branch 'master' into freebsd2
2018-11-27 20:36:44 -05:00

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/*
* Copyright (c) 2015 Andrew Kelley
*
* This file is part of zig, which is MIT licensed.
* See http://opensource.org/licenses/MIT
*/
#include "os.hpp"
#include "util.hpp"
#include "error.hpp"
#if defined(_WIN32)
#if !defined(NOMINMAX)
#define NOMINMAX
#endif
#if !defined(VC_EXTRALEAN)
#define VC_EXTRALEAN
#endif
#if !defined(WIN32_LEAN_AND_MEAN)
#define WIN32_LEAN_AND_MEAN
#endif
#if !defined(_WIN32_WINNT)
#define _WIN32_WINNT 0x600
#endif
#if !defined(NTDDI_VERSION)
#define NTDDI_VERSION 0x06000000
#endif
#include <windows.h>
#include <shlobj.h>
#include <io.h>
#include <fcntl.h>
typedef SSIZE_T ssize_t;
#else
#define ZIG_OS_POSIX
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <limits.h>
#include <spawn.h>
#endif
#if defined(ZIG_OS_LINUX) || defined(ZIG_OS_FREEBSD)
#include <link.h>
#endif
#if defined(ZIG_OS_FREEBSD)
#include <sys/sysctl.h>
#endif
#if defined(__MACH__)
#include <mach/clock.h>
#include <mach/mach.h>
#include <mach-o/dyld.h>
#endif
#if defined(ZIG_OS_WINDOWS)
static double win32_time_resolution;
#elif defined(__MACH__)
static clock_serv_t cclock;
#endif
#include <stdlib.h>
#include <errno.h>
#include <time.h>
// Apple doesn't provide the environ global variable
#if defined(__APPLE__) && !defined(environ)
#include <crt_externs.h>
#define environ (*_NSGetEnviron())
#elif defined(ZIG_OS_FREEBSD)
extern char **environ;
#endif
#if defined(ZIG_OS_POSIX)
static void populate_termination(Termination *term, int status) {
if (WIFEXITED(status)) {
term->how = TerminationIdClean;
term->code = WEXITSTATUS(status);
} else if (WIFSIGNALED(status)) {
term->how = TerminationIdSignaled;
term->code = WTERMSIG(status);
} else if (WIFSTOPPED(status)) {
term->how = TerminationIdStopped;
term->code = WSTOPSIG(status);
} else {
term->how = TerminationIdUnknown;
term->code = status;
}
}
static void os_spawn_process_posix(const char *exe, ZigList<const char *> &args, Termination *term) {
const char **argv = allocate<const char *>(args.length + 2);
argv[0] = exe;
argv[args.length + 1] = nullptr;
for (size_t i = 0; i < args.length; i += 1) {
argv[i + 1] = args.at(i);
}
pid_t pid;
int rc = posix_spawnp(&pid, exe, nullptr, nullptr, const_cast<char *const*>(argv), environ);
if (rc != 0) {
zig_panic("posix_spawn failed: %s", strerror(rc));
}
int status;
waitpid(pid, &status, 0);
populate_termination(term, status);
}
#endif
#if defined(ZIG_OS_WINDOWS)
static void os_windows_create_command_line(Buf *command_line, const char *exe, ZigList<const char *> &args) {
buf_resize(command_line, 0);
buf_append_char(command_line, '\"');
buf_append_str(command_line, exe);
buf_append_char(command_line, '\"');
for (size_t arg_i = 0; arg_i < args.length; arg_i += 1) {
buf_append_str(command_line, " \"");
const char *arg = args.at(arg_i);
size_t arg_len = strlen(arg);
for (size_t c_i = 0; c_i < arg_len; c_i += 1) {
if (arg[c_i] == '\"') {
zig_panic("TODO");
}
buf_append_char(command_line, arg[c_i]);
}
buf_append_char(command_line, '\"');
}
}
static void os_spawn_process_windows(const char *exe, ZigList<const char *> &args, Termination *term) {
Buf command_line = BUF_INIT;
os_windows_create_command_line(&command_line, exe, args);
PROCESS_INFORMATION piProcInfo = {0};
STARTUPINFO siStartInfo = {0};
siStartInfo.cb = sizeof(STARTUPINFO);
BOOL success = CreateProcessA(exe, buf_ptr(&command_line), nullptr, nullptr, TRUE, 0, nullptr, nullptr,
&siStartInfo, &piProcInfo);
if (!success) {
zig_panic("CreateProcess failed. exe: %s command_line: %s", exe, buf_ptr(&command_line));
}
WaitForSingleObject(piProcInfo.hProcess, INFINITE);
DWORD exit_code;
if (!GetExitCodeProcess(piProcInfo.hProcess, &exit_code)) {
zig_panic("GetExitCodeProcess failed");
}
term->how = TerminationIdClean;
term->code = exit_code;
}
#endif
void os_spawn_process(const char *exe, ZigList<const char *> &args, Termination *term) {
#if defined(ZIG_OS_WINDOWS)
os_spawn_process_windows(exe, args, term);
#elif defined(ZIG_OS_POSIX)
os_spawn_process_posix(exe, args, term);
#else
#error "missing os_spawn_process implementation"
#endif
}
void os_path_dirname(Buf *full_path, Buf *out_dirname) {
return os_path_split(full_path, out_dirname, nullptr);
}
bool os_is_sep(uint8_t c) {
#if defined(ZIG_OS_WINDOWS)
return c == '\\' || c == '/';
#else
return c == '/';
#endif
}
void os_path_split(Buf *full_path, Buf *out_dirname, Buf *out_basename) {
size_t len = buf_len(full_path);
if (len != 0) {
size_t last_index = len - 1;
char last_char = buf_ptr(full_path)[last_index];
if (os_is_sep(last_char)) {
if (last_index == 0) {
if (out_dirname) buf_init_from_mem(out_dirname, &last_char, 1);
if (out_basename) buf_init_from_str(out_basename, "");
return;
}
last_index -= 1;
}
for (size_t i = last_index;;) {
uint8_t c = buf_ptr(full_path)[i];
if (os_is_sep(c)) {
if (out_dirname) {
buf_init_from_mem(out_dirname, buf_ptr(full_path), (i == 0) ? 1 : i);
}
if (out_basename) {
buf_init_from_mem(out_basename, buf_ptr(full_path) + i + 1, buf_len(full_path) - (i + 1));
}
return;
}
if (i == 0) break;
i -= 1;
}
}
if (out_dirname) buf_init_from_mem(out_dirname, ".", 1);
if (out_basename) buf_init_from_buf(out_basename, full_path);
}
void os_path_extname(Buf *full_path, Buf *out_basename, Buf *out_extname) {
if (buf_len(full_path) == 0) {
if (out_basename) buf_init_from_str(out_basename, "");
if (out_extname) buf_init_from_str(out_extname, "");
return;
}
size_t i = buf_len(full_path) - 1;
while (true) {
if (buf_ptr(full_path)[i] == '.') {
if (out_basename) {
buf_resize(out_basename, 0);
buf_append_mem(out_basename, buf_ptr(full_path), i);
}
if (out_extname) {
buf_resize(out_extname, 0);
buf_append_mem(out_extname, buf_ptr(full_path) + i, buf_len(full_path) - i);
}
return;
}
if (i == 0) {
if (out_basename) buf_init_from_buf(out_basename, full_path);
if (out_extname) buf_init_from_str(out_extname, "");
return;
}
i -= 1;
}
}
void os_path_join(Buf *dirname, Buf *basename, Buf *out_full_path) {
if (buf_len(dirname) == 0) {
buf_init_from_buf(out_full_path, basename);
return;
}
buf_init_from_buf(out_full_path, dirname);
uint8_t c = *(buf_ptr(out_full_path) + buf_len(out_full_path) - 1);
if (!os_is_sep(c))
buf_append_char(out_full_path, ZIG_OS_SEP_CHAR);
buf_append_buf(out_full_path, basename);
}
int os_path_real(Buf *rel_path, Buf *out_abs_path) {
#if defined(ZIG_OS_WINDOWS)
buf_resize(out_abs_path, 4096);
if (_fullpath(buf_ptr(out_abs_path), buf_ptr(rel_path), buf_len(out_abs_path)) == nullptr) {
zig_panic("_fullpath failed");
}
buf_resize(out_abs_path, strlen(buf_ptr(out_abs_path)));
return ErrorNone;
#elif defined(ZIG_OS_POSIX)
buf_resize(out_abs_path, PATH_MAX + 1);
char *result = realpath(buf_ptr(rel_path), buf_ptr(out_abs_path));
if (!result) {
int err = errno;
if (err == EACCES) {
return ErrorAccess;
} else if (err == ENOENT) {
return ErrorFileNotFound;
} else if (err == ENOMEM) {
return ErrorNoMem;
} else {
return ErrorFileSystem;
}
}
buf_resize(out_abs_path, strlen(buf_ptr(out_abs_path)));
return ErrorNone;
#else
#error "missing os_path_real implementation"
#endif
}
#if defined(ZIG_OS_WINDOWS)
// Ported from std/os/path.zig
static bool isAbsoluteWindows(Slice<uint8_t> path) {
if (path.ptr[0] == '/')
return true;
if (path.ptr[0] == '\\') {
return true;
}
if (path.len < 3) {
return false;
}
if (path.ptr[1] == ':') {
if (path.ptr[2] == '/')
return true;
if (path.ptr[2] == '\\')
return true;
}
return false;
}
#endif
bool os_path_is_absolute(Buf *path) {
#if defined(ZIG_OS_WINDOWS)
return isAbsoluteWindows(buf_to_slice(path));
#elif defined(ZIG_OS_POSIX)
return buf_ptr(path)[0] == '/';
#else
#error "missing os_path_is_absolute implementation"
#endif
}
#if defined(ZIG_OS_WINDOWS)
enum WindowsPathKind {
WindowsPathKindNone,
WindowsPathKindDrive,
WindowsPathKindNetworkShare,
};
struct WindowsPath {
Slice<uint8_t> disk_designator;
WindowsPathKind kind;
bool is_abs;
};
// Ported from std/os/path.zig
static WindowsPath windowsParsePath(Slice<uint8_t> path) {
if (path.len >= 2 && path.ptr[1] == ':') {
return WindowsPath{
path.slice(0, 2),
WindowsPathKindDrive,
isAbsoluteWindows(path),
};
}
if (path.len >= 1 && (path.ptr[0] == '/' || path.ptr[0] == '\\') &&
(path.len == 1 || (path.ptr[1] != '/' && path.ptr[1] != '\\')))
{
return WindowsPath{
path.slice(0, 0),
WindowsPathKindNone,
true,
};
}
WindowsPath relative_path = {
str(""),
WindowsPathKindNone,
false,
};
if (path.len < strlen("//a/b")) {
return relative_path;
}
{
if (memStartsWith(path, str("//"))) {
if (path.ptr[2] == '/') {
return relative_path;
}
SplitIterator it = memSplit(path, str("/"));
{
Optional<Slice<uint8_t>> opt_component = SplitIterator_next(&it);
if (!opt_component.is_some) return relative_path;
}
{
Optional<Slice<uint8_t>> opt_component = SplitIterator_next(&it);
if (!opt_component.is_some) return relative_path;
}
return WindowsPath{
path.slice(0, it.index),
WindowsPathKindNetworkShare,
isAbsoluteWindows(path),
};
}
}
{
if (memStartsWith(path, str("\\\\"))) {
if (path.ptr[2] == '\\') {
return relative_path;
}
SplitIterator it = memSplit(path, str("\\"));
{
Optional<Slice<uint8_t>> opt_component = SplitIterator_next(&it);
if (!opt_component.is_some) return relative_path;
}
{
Optional<Slice<uint8_t>> opt_component = SplitIterator_next(&it);
if (!opt_component.is_some) return relative_path;
}
return WindowsPath{
path.slice(0, it.index),
WindowsPathKindNetworkShare,
isAbsoluteWindows(path),
};
}
}
return relative_path;
}
// Ported from std/os/path.zig
static uint8_t asciiUpper(uint8_t byte) {
if (byte >= 'a' && byte <= 'z') {
return 'A' + (byte - 'a');
}
return byte;
}
// Ported from std/os/path.zig
static bool asciiEqlIgnoreCase(Slice<uint8_t> s1, Slice<uint8_t> s2) {
if (s1.len != s2.len)
return false;
for (size_t i = 0; i < s1.len; i += 1) {
if (asciiUpper(s1.ptr[i]) != asciiUpper(s2.ptr[i]))
return false;
}
return true;
}
// Ported from std/os/path.zig
static bool compareDiskDesignators(WindowsPathKind kind, Slice<uint8_t> p1, Slice<uint8_t> p2) {
switch (kind) {
case WindowsPathKindNone:
assert(p1.len == 0);
assert(p2.len == 0);
return true;
case WindowsPathKindDrive:
return asciiUpper(p1.ptr[0]) == asciiUpper(p2.ptr[0]);
case WindowsPathKindNetworkShare:
uint8_t sep1 = p1.ptr[0];
uint8_t sep2 = p2.ptr[0];
SplitIterator it1 = memSplit(p1, {&sep1, 1});
SplitIterator it2 = memSplit(p2, {&sep2, 1});
// TODO ASCII is wrong, we actually need full unicode support to compare paths.
return asciiEqlIgnoreCase(SplitIterator_next(&it1).value, SplitIterator_next(&it2).value) &&
asciiEqlIgnoreCase(SplitIterator_next(&it1).value, SplitIterator_next(&it2).value);
}
zig_unreachable();
}
// Ported from std/os/path.zig
static Buf os_path_resolve_windows(Buf **paths_ptr, size_t paths_len) {
if (paths_len == 0) {
Buf cwd = BUF_INIT;
int err;
if ((err = os_get_cwd(&cwd))) {
zig_panic("get cwd failed");
}
return cwd;
}
// determine which disk designator we will result with, if any
char result_drive_buf[3] = {'_', ':', '\0'}; // 0 needed for strlen later
Slice<uint8_t> result_disk_designator = str("");
WindowsPathKind have_drive_kind = WindowsPathKindNone;
bool have_abs_path = false;
size_t first_index = 0;
size_t max_size = 0;
for (size_t i = 0; i < paths_len; i += 1) {
Slice<uint8_t> p = buf_to_slice(paths_ptr[i]);
WindowsPath parsed = windowsParsePath(p);
if (parsed.is_abs) {
have_abs_path = true;
first_index = i;
max_size = result_disk_designator.len;
}
switch (parsed.kind) {
case WindowsPathKindDrive:
result_drive_buf[0] = asciiUpper(parsed.disk_designator.ptr[0]);
result_disk_designator = str(result_drive_buf);
have_drive_kind = WindowsPathKindDrive;
break;
case WindowsPathKindNetworkShare:
result_disk_designator = parsed.disk_designator;
have_drive_kind = WindowsPathKindNetworkShare;
break;
case WindowsPathKindNone:
break;
}
max_size += p.len + 1;
}
// if we will result with a disk designator, loop again to determine
// which is the last time the disk designator is absolutely specified, if any
// and count up the max bytes for paths related to this disk designator
if (have_drive_kind != WindowsPathKindNone) {
have_abs_path = false;
first_index = 0;
max_size = result_disk_designator.len;
bool correct_disk_designator = false;
for (size_t i = 0; i < paths_len; i += 1) {
Slice<uint8_t> p = buf_to_slice(paths_ptr[i]);
WindowsPath parsed = windowsParsePath(p);
if (parsed.kind != WindowsPathKindNone) {
if (parsed.kind == have_drive_kind) {
correct_disk_designator = compareDiskDesignators(have_drive_kind, result_disk_designator, parsed.disk_designator);
} else {
continue;
}
}
if (!correct_disk_designator) {
continue;
}
if (parsed.is_abs) {
first_index = i;
max_size = result_disk_designator.len;
have_abs_path = true;
}
max_size += p.len + 1;
}
}
// Allocate result and fill in the disk designator, calling getCwd if we have to.
Slice<uint8_t> result;
size_t result_index = 0;
if (have_abs_path) {
switch (have_drive_kind) {
case WindowsPathKindDrive: {
result = Slice<uint8_t>::alloc(max_size);
memCopy(result, result_disk_designator);
result_index += result_disk_designator.len;
break;
}
case WindowsPathKindNetworkShare: {
result = Slice<uint8_t>::alloc(max_size);
SplitIterator it = memSplit(buf_to_slice(paths_ptr[first_index]), str("/\\"));
Slice<uint8_t> server_name = SplitIterator_next(&it).value;
Slice<uint8_t> other_name = SplitIterator_next(&it).value;
result.ptr[result_index] = '\\';
result_index += 1;
result.ptr[result_index] = '\\';
result_index += 1;
memCopy(result.sliceFrom(result_index), server_name);
result_index += server_name.len;
result.ptr[result_index] = '\\';
result_index += 1;
memCopy(result.sliceFrom(result_index), other_name);
result_index += other_name.len;
result_disk_designator = result.slice(0, result_index);
break;
}
case WindowsPathKindNone: {
Buf cwd = BUF_INIT;
int err;
if ((err = os_get_cwd(&cwd))) {
zig_panic("get cwd failed");
}
WindowsPath parsed_cwd = windowsParsePath(buf_to_slice(&cwd));
result = Slice<uint8_t>::alloc(max_size + parsed_cwd.disk_designator.len + 1);
memCopy(result, parsed_cwd.disk_designator);
result_index += parsed_cwd.disk_designator.len;
result_disk_designator = result.slice(0, parsed_cwd.disk_designator.len);
if (parsed_cwd.kind == WindowsPathKindDrive) {
result.ptr[0] = asciiUpper(result.ptr[0]);
}
have_drive_kind = parsed_cwd.kind;
break;
}
}
} else {
// TODO call get cwd for the result_disk_designator instead of the global one
Buf cwd = BUF_INIT;
int err;
if ((err = os_get_cwd(&cwd))) {
zig_panic("get cwd failed");
}
result = Slice<uint8_t>::alloc(max_size + buf_len(&cwd) + 1);
memCopy(result, buf_to_slice(&cwd));
result_index += buf_len(&cwd);
WindowsPath parsed_cwd = windowsParsePath(result.slice(0, result_index));
result_disk_designator = parsed_cwd.disk_designator;
if (parsed_cwd.kind == WindowsPathKindDrive) {
result.ptr[0] = asciiUpper(result.ptr[0]);
}
have_drive_kind = parsed_cwd.kind;
}
// Now we know the disk designator to use, if any, and what kind it is. And our result
// is big enough to append all the paths to.
bool correct_disk_designator = true;
for (size_t i = 0; i < paths_len; i += 1) {
Slice<uint8_t> p = buf_to_slice(paths_ptr[i]);
WindowsPath parsed = windowsParsePath(p);
if (parsed.kind != WindowsPathKindNone) {
if (parsed.kind == have_drive_kind) {
correct_disk_designator = compareDiskDesignators(have_drive_kind, result_disk_designator, parsed.disk_designator);
} else {
continue;
}
}
if (!correct_disk_designator) {
continue;
}
SplitIterator it = memSplit(p.sliceFrom(parsed.disk_designator.len), str("/\\"));
while (true) {
Optional<Slice<uint8_t>> opt_component = SplitIterator_next(&it);
if (!opt_component.is_some) break;
Slice<uint8_t> component = opt_component.value;
if (memEql(component, str("."))) {
continue;
} else if (memEql(component, str(".."))) {
while (true) {
if (result_index == 0 || result_index == result_disk_designator.len)
break;
result_index -= 1;
if (result.ptr[result_index] == '\\' || result.ptr[result_index] == '/')
break;
}
} else {
result.ptr[result_index] = '\\';
result_index += 1;
memCopy(result.sliceFrom(result_index), component);
result_index += component.len;
}
}
}
if (result_index == result_disk_designator.len) {
result.ptr[result_index] = '\\';
result_index += 1;
}
Buf return_value = BUF_INIT;
buf_init_from_mem(&return_value, (char *)result.ptr, result_index);
return return_value;
}
#endif
#if defined(ZIG_OS_POSIX)
// Ported from std/os/path.zig
static Buf os_path_resolve_posix(Buf **paths_ptr, size_t paths_len) {
if (paths_len == 0) {
Buf cwd = BUF_INIT;
int err;
if ((err = os_get_cwd(&cwd))) {
zig_panic("get cwd failed");
}
return cwd;
}
size_t first_index = 0;
bool have_abs = false;
size_t max_size = 0;
for (size_t i = 0; i < paths_len; i += 1) {
Buf *p = paths_ptr[i];
if (os_path_is_absolute(p)) {
first_index = i;
have_abs = true;
max_size = 0;
}
max_size += buf_len(p) + 1;
}
uint8_t *result_ptr;
size_t result_len;
size_t result_index = 0;
if (have_abs) {
result_len = max_size;
result_ptr = allocate_nonzero<uint8_t>(result_len);
} else {
Buf cwd = BUF_INIT;
int err;
if ((err = os_get_cwd(&cwd))) {
zig_panic("get cwd failed");
}
result_len = max_size + buf_len(&cwd) + 1;
result_ptr = allocate_nonzero<uint8_t>(result_len);
memcpy(result_ptr, buf_ptr(&cwd), buf_len(&cwd));
result_index += buf_len(&cwd);
}
for (size_t i = first_index; i < paths_len; i += 1) {
Buf *p = paths_ptr[i];
SplitIterator it = memSplit(buf_to_slice(p), str("/"));
while (true) {
Optional<Slice<uint8_t>> opt_component = SplitIterator_next(&it);
if (!opt_component.is_some) break;
Slice<uint8_t> component = opt_component.value;
if (memEql<uint8_t>(component, str("."))) {
continue;
} else if (memEql<uint8_t>(component, str(".."))) {
while (true) {
if (result_index == 0)
break;
result_index -= 1;
if (result_ptr[result_index] == '/')
break;
}
} else {
result_ptr[result_index] = '/';
result_index += 1;
memcpy(result_ptr + result_index, component.ptr, component.len);
result_index += component.len;
}
}
}
if (result_index == 0) {
result_ptr[0] = '/';
result_index += 1;
}
Buf return_value = BUF_INIT;
buf_init_from_mem(&return_value, (char *)result_ptr, result_index);
return return_value;
}
#endif
// Ported from std/os/path.zig
Buf os_path_resolve(Buf **paths_ptr, size_t paths_len) {
#if defined(ZIG_OS_WINDOWS)
return os_path_resolve_windows(paths_ptr, paths_len);
#elif defined(ZIG_OS_POSIX)
return os_path_resolve_posix(paths_ptr, paths_len);
#else
#error "missing os_path_resolve implementation"
#endif
}
Error os_fetch_file(FILE *f, Buf *out_buf, bool skip_shebang) {
static const ssize_t buf_size = 0x2000;
buf_resize(out_buf, buf_size);
ssize_t actual_buf_len = 0;
bool first_read = true;
for (;;) {
size_t amt_read = fread(buf_ptr(out_buf) + actual_buf_len, 1, buf_size, f);
actual_buf_len += amt_read;
if (skip_shebang && first_read && buf_starts_with_str(out_buf, "#!")) {
size_t i = 0;
while (true) {
if (i > buf_len(out_buf)) {
zig_panic("shebang line exceeded %zd characters", buf_size);
}
size_t current_pos = i;
i += 1;
if (out_buf->list.at(current_pos) == '\n') {
break;
}
}
ZigList<char> *list = &out_buf->list;
memmove(list->items, list->items + i, list->length - i);
list->length -= i;
actual_buf_len -= i;
}
if (amt_read != buf_size) {
if (feof(f)) {
buf_resize(out_buf, actual_buf_len);
return ErrorNone;
} else {
return ErrorFileSystem;
}
}
buf_resize(out_buf, actual_buf_len + buf_size);
first_read = false;
}
zig_unreachable();
}
Error os_file_exists(Buf *full_path, bool *result) {
#if defined(ZIG_OS_WINDOWS)
*result = GetFileAttributes(buf_ptr(full_path)) != INVALID_FILE_ATTRIBUTES;
return ErrorNone;
#else
*result = access(buf_ptr(full_path), F_OK) != -1;
return ErrorNone;
#endif
}
#if defined(ZIG_OS_POSIX)
static Error os_exec_process_posix(const char *exe, ZigList<const char *> &args,
Termination *term, Buf *out_stderr, Buf *out_stdout)
{
int stdin_pipe[2];
int stdout_pipe[2];
int stderr_pipe[2];
int err;
if ((err = pipe(stdin_pipe)))
zig_panic("pipe failed");
if ((err = pipe(stdout_pipe)))
zig_panic("pipe failed");
if ((err = pipe(stderr_pipe)))
zig_panic("pipe failed");
pid_t pid = fork();
if (pid == -1)
zig_panic("fork failed: %s", strerror(errno));
if (pid == 0) {
// child
if (dup2(stdin_pipe[0], STDIN_FILENO) == -1)
zig_panic("dup2 failed");
if (dup2(stdout_pipe[1], STDOUT_FILENO) == -1)
zig_panic("dup2 failed");
if (dup2(stderr_pipe[1], STDERR_FILENO) == -1)
zig_panic("dup2 failed");
const char **argv = allocate<const char *>(args.length + 2);
argv[0] = exe;
argv[args.length + 1] = nullptr;
for (size_t i = 0; i < args.length; i += 1) {
argv[i + 1] = args.at(i);
}
execvp(exe, const_cast<char * const *>(argv));
if (errno == ENOENT) {
return ErrorFileNotFound;
} else {
zig_panic("execvp failed: %s", strerror(errno));
}
} else {
// parent
close(stdin_pipe[0]);
close(stdin_pipe[1]);
close(stdout_pipe[1]);
close(stderr_pipe[1]);
int status;
waitpid(pid, &status, 0);
populate_termination(term, status);
FILE *stdout_f = fdopen(stdout_pipe[0], "rb");
FILE *stderr_f = fdopen(stderr_pipe[0], "rb");
Error err1 = os_fetch_file(stdout_f, out_stdout, false);
Error err2 = os_fetch_file(stderr_f, out_stderr, false);
fclose(stdout_f);
fclose(stderr_f);
if (err1) return err1;
if (err2) return err2;
return ErrorNone;
}
}
#endif
#if defined(ZIG_OS_WINDOWS)
//static void win32_panic(const char *str) {
// DWORD err = GetLastError();
// LPSTR messageBuffer = nullptr;
// FormatMessageA(
// FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
// NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&messageBuffer, 0, NULL);
// zig_panic(str, messageBuffer);
// LocalFree(messageBuffer);
//}
static Error os_exec_process_windows(const char *exe, ZigList<const char *> &args,
Termination *term, Buf *out_stderr, Buf *out_stdout)
{
Buf command_line = BUF_INIT;
os_windows_create_command_line(&command_line, exe, args);
HANDLE g_hChildStd_IN_Rd = NULL;
HANDLE g_hChildStd_IN_Wr = NULL;
HANDLE g_hChildStd_OUT_Rd = NULL;
HANDLE g_hChildStd_OUT_Wr = NULL;
HANDLE g_hChildStd_ERR_Rd = NULL;
HANDLE g_hChildStd_ERR_Wr = NULL;
SECURITY_ATTRIBUTES saAttr;
saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
saAttr.bInheritHandle = TRUE;
saAttr.lpSecurityDescriptor = NULL;
if (!CreatePipe(&g_hChildStd_OUT_Rd, &g_hChildStd_OUT_Wr, &saAttr, 0)) {
zig_panic("StdoutRd CreatePipe");
}
if (!SetHandleInformation(g_hChildStd_OUT_Rd, HANDLE_FLAG_INHERIT, 0)) {
zig_panic("Stdout SetHandleInformation");
}
if (!CreatePipe(&g_hChildStd_ERR_Rd, &g_hChildStd_ERR_Wr, &saAttr, 0)) {
zig_panic("stderr CreatePipe");
}
if (!SetHandleInformation(g_hChildStd_ERR_Rd, HANDLE_FLAG_INHERIT, 0)) {
zig_panic("stderr SetHandleInformation");
}
if (!CreatePipe(&g_hChildStd_IN_Rd, &g_hChildStd_IN_Wr, &saAttr, 0)) {
zig_panic("Stdin CreatePipe");
}
if (!SetHandleInformation(g_hChildStd_IN_Wr, HANDLE_FLAG_INHERIT, 0)) {
zig_panic("Stdin SetHandleInformation");
}
PROCESS_INFORMATION piProcInfo = {0};
STARTUPINFO siStartInfo = {0};
siStartInfo.cb = sizeof(STARTUPINFO);
siStartInfo.hStdError = g_hChildStd_ERR_Wr;
siStartInfo.hStdOutput = g_hChildStd_OUT_Wr;
siStartInfo.hStdInput = g_hChildStd_IN_Rd;
siStartInfo.dwFlags |= STARTF_USESTDHANDLES;
BOOL success = CreateProcess(exe, buf_ptr(&command_line), nullptr, nullptr, TRUE, 0, nullptr, nullptr,
&siStartInfo, &piProcInfo);
if (!success) {
if (GetLastError() == ERROR_FILE_NOT_FOUND) {
CloseHandle(piProcInfo.hProcess);
CloseHandle(piProcInfo.hThread);
return ErrorFileNotFound;
}
zig_panic("CreateProcess failed. exe: %s command_line: %s", exe, buf_ptr(&command_line));
}
if (!CloseHandle(g_hChildStd_IN_Wr)) {
zig_panic("stdinwr closehandle");
}
CloseHandle(g_hChildStd_IN_Rd);
CloseHandle(g_hChildStd_ERR_Wr);
CloseHandle(g_hChildStd_OUT_Wr);
static const size_t BUF_SIZE = 4 * 1024;
{
DWORD dwRead;
char chBuf[BUF_SIZE];
buf_resize(out_stdout, 0);
for (;;) {
success = ReadFile( g_hChildStd_OUT_Rd, chBuf, BUF_SIZE, &dwRead, NULL);
if (!success || dwRead == 0) break;
buf_append_mem(out_stdout, chBuf, dwRead);
}
CloseHandle(g_hChildStd_OUT_Rd);
}
{
DWORD dwRead;
char chBuf[BUF_SIZE];
buf_resize(out_stderr, 0);
for (;;) {
success = ReadFile( g_hChildStd_ERR_Rd, chBuf, BUF_SIZE, &dwRead, NULL);
if (!success || dwRead == 0) break;
buf_append_mem(out_stderr, chBuf, dwRead);
}
CloseHandle(g_hChildStd_ERR_Rd);
}
WaitForSingleObject(piProcInfo.hProcess, INFINITE);
DWORD exit_code;
if (!GetExitCodeProcess(piProcInfo.hProcess, &exit_code)) {
zig_panic("GetExitCodeProcess failed");
}
term->how = TerminationIdClean;
term->code = exit_code;
CloseHandle(piProcInfo.hProcess);
CloseHandle(piProcInfo.hThread);
return ErrorNone;
}
#endif
Error os_execv(const char *exe, const char **argv) {
#if defined(ZIG_OS_WINDOWS)
return ErrorUnsupportedOperatingSystem;
#else
execv(exe, (char *const *)argv);
switch (errno) {
case ENOMEM:
return ErrorSystemResources;
case EIO:
return ErrorFileSystem;
default:
return ErrorUnexpected;
}
#endif
}
Error os_exec_process(const char *exe, ZigList<const char *> &args,
Termination *term, Buf *out_stderr, Buf *out_stdout)
{
#if defined(ZIG_OS_WINDOWS)
return os_exec_process_windows(exe, args, term, out_stderr, out_stdout);
#elif defined(ZIG_OS_POSIX)
return os_exec_process_posix(exe, args, term, out_stderr, out_stdout);
#else
#error "missing os_exec_process implementation"
#endif
}
void os_write_file(Buf *full_path, Buf *contents) {
FILE *f = fopen(buf_ptr(full_path), "wb");
if (!f) {
zig_panic("os_write_file failed for %s", buf_ptr(full_path));
}
size_t amt_written = fwrite(buf_ptr(contents), 1, buf_len(contents), f);
if (amt_written != (size_t)buf_len(contents))
zig_panic("write failed: %s", strerror(errno));
if (fclose(f))
zig_panic("close failed");
}
Error os_copy_file(Buf *src_path, Buf *dest_path) {
FILE *src_f = fopen(buf_ptr(src_path), "rb");
if (!src_f) {
int err = errno;
if (err == ENOENT) {
return ErrorFileNotFound;
} else if (err == EACCES || err == EPERM) {
return ErrorAccess;
} else {
return ErrorFileSystem;
}
}
FILE *dest_f = fopen(buf_ptr(dest_path), "wb");
if (!dest_f) {
int err = errno;
if (err == ENOENT) {
fclose(src_f);
return ErrorFileNotFound;
} else if (err == EACCES || err == EPERM) {
fclose(src_f);
return ErrorAccess;
} else {
fclose(src_f);
return ErrorFileSystem;
}
}
static const size_t buf_size = 2048;
char buf[buf_size];
for (;;) {
size_t amt_read = fread(buf, 1, buf_size, src_f);
if (amt_read != buf_size) {
if (ferror(src_f)) {
fclose(src_f);
fclose(dest_f);
return ErrorFileSystem;
}
}
size_t amt_written = fwrite(buf, 1, amt_read, dest_f);
if (amt_written != amt_read) {
fclose(src_f);
fclose(dest_f);
return ErrorFileSystem;
}
if (feof(src_f)) {
fclose(src_f);
fclose(dest_f);
return ErrorNone;
}
}
}
Error os_fetch_file_path(Buf *full_path, Buf *out_contents, bool skip_shebang) {
FILE *f = fopen(buf_ptr(full_path), "rb");
if (!f) {
switch (errno) {
case EACCES:
return ErrorAccess;
case EINTR:
return ErrorInterrupted;
case EINVAL:
zig_unreachable();
case ENFILE:
case ENOMEM:
return ErrorSystemResources;
case ENOENT:
return ErrorFileNotFound;
default:
return ErrorFileSystem;
}
}
Error result = os_fetch_file(f, out_contents, skip_shebang);
fclose(f);
return result;
}
Error os_get_cwd(Buf *out_cwd) {
#if defined(ZIG_OS_WINDOWS)
char buf[4096];
if (GetCurrentDirectory(4096, buf) == 0) {
zig_panic("GetCurrentDirectory failed");
}
buf_init_from_str(out_cwd, buf);
return ErrorNone;
#elif defined(ZIG_OS_POSIX)
char buf[PATH_MAX];
char *res = getcwd(buf, PATH_MAX);
if (res == nullptr) {
zig_panic("unable to get cwd: %s", strerror(errno));
}
buf_init_from_str(out_cwd, res);
return ErrorNone;
#else
#error "missing os_get_cwd implementation"
#endif
}
#if defined(ZIG_OS_WINDOWS)
#define is_wprefix(s, prefix) \
(wcsncmp((s), (prefix), sizeof(prefix) / sizeof(WCHAR) - 1) == 0)
static bool is_stderr_cyg_pty(void) {
HANDLE stderr_handle = GetStdHandle(STD_ERROR_HANDLE);
if (stderr_handle == INVALID_HANDLE_VALUE)
return false;
int size = sizeof(FILE_NAME_INFO) + sizeof(WCHAR) * MAX_PATH;
FILE_NAME_INFO *nameinfo;
WCHAR *p = NULL;
// Cygwin/msys's pty is a pipe.
if (GetFileType(stderr_handle) != FILE_TYPE_PIPE) {
return 0;
}
nameinfo = (FILE_NAME_INFO *)allocate<char>(size);
if (nameinfo == NULL) {
return 0;
}
// Check the name of the pipe:
// '\{cygwin,msys}-XXXXXXXXXXXXXXXX-ptyN-{from,to}-master'
if (GetFileInformationByHandleEx(stderr_handle, FileNameInfo, nameinfo, size)) {
nameinfo->FileName[nameinfo->FileNameLength / sizeof(WCHAR)] = L'\0';
p = nameinfo->FileName;
if (is_wprefix(p, L"\\cygwin-")) { /* Cygwin */
p += 8;
} else if (is_wprefix(p, L"\\msys-")) { /* MSYS and MSYS2 */
p += 6;
} else {
p = NULL;
}
if (p != NULL) {
while (*p && isxdigit(*p)) /* Skip 16-digit hexadecimal. */
++p;
if (is_wprefix(p, L"-pty")) {
p += 4;
} else {
p = NULL;
}
}
if (p != NULL) {
while (*p && isdigit(*p)) /* Skip pty number. */
++p;
if (is_wprefix(p, L"-from-master")) {
//p += 12;
} else if (is_wprefix(p, L"-to-master")) {
//p += 10;
} else {
p = NULL;
}
}
}
free(nameinfo);
return (p != NULL);
}
#endif
bool os_stderr_tty(void) {
#if defined(ZIG_OS_WINDOWS)
return _isatty(_fileno(stderr)) != 0 || is_stderr_cyg_pty();
#elif defined(ZIG_OS_POSIX)
return isatty(STDERR_FILENO) != 0;
#else
#error "missing os_stderr_tty implementation"
#endif
}
#if defined(ZIG_OS_POSIX)
static Error os_buf_to_tmp_file_posix(Buf *contents, Buf *suffix, Buf *out_tmp_path) {
const char *tmp_dir = getenv("TMPDIR");
if (!tmp_dir) {
tmp_dir = P_tmpdir;
}
buf_resize(out_tmp_path, 0);
buf_appendf(out_tmp_path, "%s/XXXXXX%s", tmp_dir, buf_ptr(suffix));
int fd = mkstemps(buf_ptr(out_tmp_path), (int)buf_len(suffix));
if (fd < 0) {
return ErrorFileSystem;
}
FILE *f = fdopen(fd, "wb");
if (!f) {
zig_panic("fdopen failed");
}
size_t amt_written = fwrite(buf_ptr(contents), 1, buf_len(contents), f);
if (amt_written != (size_t)buf_len(contents))
zig_panic("write failed: %s", strerror(errno));
if (fclose(f))
zig_panic("close failed");
return ErrorNone;
}
#endif
#if defined(ZIG_OS_WINDOWS)
static Error os_buf_to_tmp_file_windows(Buf *contents, Buf *suffix, Buf *out_tmp_path) {
char tmp_dir[MAX_PATH + 1];
if (GetTempPath(MAX_PATH, tmp_dir) == 0) {
zig_panic("GetTempPath failed");
}
buf_init_from_str(out_tmp_path, tmp_dir);
const char base64[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_";
assert(array_length(base64) == 64 + 1);
for (size_t i = 0; i < 8; i += 1) {
buf_append_char(out_tmp_path, base64[rand() % 64]);
}
buf_append_buf(out_tmp_path, suffix);
FILE *f = fopen(buf_ptr(out_tmp_path), "wb");
if (!f) {
zig_panic("unable to open %s: %s", buf_ptr(out_tmp_path), strerror(errno));
}
size_t amt_written = fwrite(buf_ptr(contents), 1, buf_len(contents), f);
if (amt_written != (size_t)buf_len(contents)) {
zig_panic("write failed: %s", strerror(errno));
}
if (fclose(f)) {
zig_panic("fclose failed");
}
return ErrorNone;
}
#endif
Error os_buf_to_tmp_file(Buf *contents, Buf *suffix, Buf *out_tmp_path) {
#if defined(ZIG_OS_WINDOWS)
return os_buf_to_tmp_file_windows(contents, suffix, out_tmp_path);
#elif defined(ZIG_OS_POSIX)
return os_buf_to_tmp_file_posix(contents, suffix, out_tmp_path);
#else
#error "missing os_buf_to_tmp_file implementation"
#endif
}
Error os_delete_file(Buf *path) {
if (remove(buf_ptr(path))) {
return ErrorFileSystem;
} else {
return ErrorNone;
}
}
Error os_rename(Buf *src_path, Buf *dest_path) {
if (buf_eql_buf(src_path, dest_path)) {
return ErrorNone;
}
#if defined(ZIG_OS_WINDOWS)
if (!MoveFileExA(buf_ptr(src_path), buf_ptr(dest_path), MOVEFILE_REPLACE_EXISTING)) {
return ErrorFileSystem;
}
#else
if (rename(buf_ptr(src_path), buf_ptr(dest_path)) == -1) {
return ErrorFileSystem;
}
#endif
return ErrorNone;
}
double os_get_time(void) {
#if defined(ZIG_OS_WINDOWS)
unsigned __int64 time;
QueryPerformanceCounter((LARGE_INTEGER*) &time);
return time * win32_time_resolution;
#elif defined(__MACH__)
mach_timespec_t mts;
kern_return_t err = clock_get_time(cclock, &mts);
assert(!err);
double seconds = (double)mts.tv_sec;
seconds += ((double)mts.tv_nsec) / 1000000000.0;
return seconds;
#else
struct timespec tms;
clock_gettime(CLOCK_MONOTONIC, &tms);
double seconds = (double)tms.tv_sec;
seconds += ((double)tms.tv_nsec) / 1000000000.0;
return seconds;
#endif
}
Error os_make_path(Buf *path) {
Buf resolved_path = os_path_resolve(&path, 1);
size_t end_index = buf_len(&resolved_path);
Error err;
while (true) {
if ((err = os_make_dir(buf_slice(&resolved_path, 0, end_index)))) {
if (err == ErrorPathAlreadyExists) {
if (end_index == buf_len(&resolved_path))
return ErrorNone;
} else if (err == ErrorFileNotFound) {
// march end_index backward until next path component
while (true) {
end_index -= 1;
if (os_is_sep(buf_ptr(&resolved_path)[end_index]))
break;
}
continue;
} else {
return err;
}
}
if (end_index == buf_len(&resolved_path))
return ErrorNone;
// march end_index forward until next path component
while (true) {
end_index += 1;
if (end_index == buf_len(&resolved_path) || os_is_sep(buf_ptr(&resolved_path)[end_index]))
break;
}
}
return ErrorNone;
}
Error os_make_dir(Buf *path) {
#if defined(ZIG_OS_WINDOWS)
if (!CreateDirectory(buf_ptr(path), NULL)) {
if (GetLastError() == ERROR_ALREADY_EXISTS)
return ErrorPathAlreadyExists;
if (GetLastError() == ERROR_PATH_NOT_FOUND)
return ErrorFileNotFound;
if (GetLastError() == ERROR_ACCESS_DENIED)
return ErrorAccess;
return ErrorUnexpected;
}
return ErrorNone;
#else
if (mkdir(buf_ptr(path), 0755) == -1) {
if (errno == EEXIST)
return ErrorPathAlreadyExists;
if (errno == ENOENT)
return ErrorFileNotFound;
if (errno == EACCES)
return ErrorAccess;
return ErrorUnexpected;
}
return ErrorNone;
#endif
}
int os_init(void) {
srand((unsigned)time(NULL));
#if defined(ZIG_OS_WINDOWS)
_setmode(fileno(stdout), _O_BINARY);
_setmode(fileno(stderr), _O_BINARY);
unsigned __int64 frequency;
if (QueryPerformanceFrequency((LARGE_INTEGER*) &frequency)) {
win32_time_resolution = 1.0 / (double) frequency;
} else {
return ErrorSystemResources;
}
#elif defined(__MACH__)
host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &cclock);
#endif
return 0;
}
Error os_self_exe_path(Buf *out_path) {
#if defined(ZIG_OS_WINDOWS)
buf_resize(out_path, 256);
for (;;) {
DWORD copied_amt = GetModuleFileName(nullptr, buf_ptr(out_path), buf_len(out_path));
if (copied_amt <= 0) {
return ErrorFileNotFound;
}
if (copied_amt < buf_len(out_path)) {
buf_resize(out_path, copied_amt);
return ErrorNone;
}
buf_resize(out_path, buf_len(out_path) * 2);
}
#elif defined(ZIG_OS_DARWIN)
// How long is the executable's path?
uint32_t u32_len = 0;
int ret1 = _NSGetExecutablePath(nullptr, &u32_len);
assert(ret1 != 0);
Buf *tmp = buf_alloc_fixed(u32_len);
// Fill the executable path.
int ret2 = _NSGetExecutablePath(buf_ptr(tmp), &u32_len);
assert(ret2 == 0);
// According to libuv project, PATH_MAX*2 works around a libc bug where
// the resolved path is sometimes bigger than PATH_MAX.
buf_resize(out_path, PATH_MAX*2);
char *real_path = realpath(buf_ptr(tmp), buf_ptr(out_path));
if (!real_path) {
buf_init_from_buf(out_path, tmp);
return ErrorNone;
}
// Resize out_path for the correct length.
buf_resize(out_path, strlen(buf_ptr(out_path)));
return ErrorNone;
#elif defined(ZIG_OS_LINUX)
buf_resize(out_path, PATH_MAX);
ssize_t amt = readlink("/proc/self/exe", buf_ptr(out_path), buf_len(out_path));
if (amt == -1) {
return ErrorUnexpected;
}
buf_resize(out_path, amt);
return ErrorNone;
#elif defined(ZIG_OS_FREEBSD)
buf_resize(out_path, PATH_MAX);
int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
size_t cb = PATH_MAX;
if (sysctl(mib, 4, buf_ptr(out_path), &cb, nullptr, 0) != 0) {
return ErrorUnexpected;
}
buf_resize(out_path, cb);
return ErrorNone;
#endif
return ErrorFileNotFound;
}
#define VT_RED "\x1b[31;1m"
#define VT_GREEN "\x1b[32;1m"
#define VT_CYAN "\x1b[36;1m"
#define VT_WHITE "\x1b[37;1m"
#define VT_BOLD "\x1b[0;1m"
#define VT_RESET "\x1b[0m"
static void set_color_posix(TermColor color) {
switch (color) {
case TermColorRed:
fprintf(stderr, VT_RED);
break;
case TermColorGreen:
fprintf(stderr, VT_GREEN);
break;
case TermColorCyan:
fprintf(stderr, VT_CYAN);
break;
case TermColorWhite:
fprintf(stderr, VT_WHITE);
break;
case TermColorBold:
fprintf(stderr, VT_BOLD);
break;
case TermColorReset:
fprintf(stderr, VT_RESET);
break;
}
}
#if defined(ZIG_OS_WINDOWS)
bool got_orig_console_attrs = false;
WORD original_console_attributes = FOREGROUND_RED|FOREGROUND_GREEN|FOREGROUND_BLUE;
#endif
void os_stderr_set_color(TermColor color) {
#if defined(ZIG_OS_WINDOWS)
if (is_stderr_cyg_pty()) {
set_color_posix(color);
return;
}
HANDLE stderr_handle = GetStdHandle(STD_ERROR_HANDLE);
if (stderr_handle == INVALID_HANDLE_VALUE)
zig_panic("unable to get stderr handle");
fflush(stderr);
if (!got_orig_console_attrs) {
got_orig_console_attrs = true;
CONSOLE_SCREEN_BUFFER_INFO info;
if (GetConsoleScreenBufferInfo(stderr_handle, &info)) {
original_console_attributes = info.wAttributes;
}
}
switch (color) {
case TermColorRed:
SetConsoleTextAttribute(stderr_handle, FOREGROUND_RED|FOREGROUND_INTENSITY);
break;
case TermColorGreen:
SetConsoleTextAttribute(stderr_handle, FOREGROUND_GREEN|FOREGROUND_INTENSITY);
break;
case TermColorCyan:
SetConsoleTextAttribute(stderr_handle, FOREGROUND_GREEN|FOREGROUND_BLUE|FOREGROUND_INTENSITY);
break;
case TermColorWhite:
case TermColorBold:
SetConsoleTextAttribute(stderr_handle,
FOREGROUND_RED|FOREGROUND_GREEN|FOREGROUND_BLUE|FOREGROUND_INTENSITY);
break;
case TermColorReset:
SetConsoleTextAttribute(stderr_handle, original_console_attributes);
break;
}
#else
set_color_posix(color);
#endif
}
int os_get_win32_ucrt_lib_path(ZigWindowsSDK *sdk, Buf* output_buf, ZigLLVM_ArchType platform_type) {
#if defined(ZIG_OS_WINDOWS)
buf_resize(output_buf, 0);
buf_appendf(output_buf, "%s\\Lib\\%s\\ucrt\\", sdk->path10_ptr, sdk->version10_ptr);
switch (platform_type) {
case ZigLLVM_x86:
buf_append_str(output_buf, "x86\\");
break;
case ZigLLVM_x86_64:
buf_append_str(output_buf, "x64\\");
break;
case ZigLLVM_arm:
buf_append_str(output_buf, "arm\\");
break;
default:
zig_panic("Attempted to use vcruntime for non-supported platform.");
}
Buf* tmp_buf = buf_alloc();
buf_init_from_buf(tmp_buf, output_buf);
buf_append_str(tmp_buf, "ucrt.lib");
if (GetFileAttributesA(buf_ptr(tmp_buf)) != INVALID_FILE_ATTRIBUTES) {
return 0;
}
else {
buf_resize(output_buf, 0);
return ErrorFileNotFound;
}
#else
return ErrorFileNotFound;
#endif
}
int os_get_win32_ucrt_include_path(ZigWindowsSDK *sdk, Buf* output_buf) {
#if defined(ZIG_OS_WINDOWS)
buf_resize(output_buf, 0);
buf_appendf(output_buf, "%s\\Include\\%s\\ucrt", sdk->path10_ptr, sdk->version10_ptr);
if (GetFileAttributesA(buf_ptr(output_buf)) != INVALID_FILE_ATTRIBUTES) {
return 0;
}
else {
buf_resize(output_buf, 0);
return ErrorFileNotFound;
}
#else
return ErrorFileNotFound;
#endif
}
int os_get_win32_kern32_path(ZigWindowsSDK *sdk, Buf* output_buf, ZigLLVM_ArchType platform_type) {
#if defined(ZIG_OS_WINDOWS)
{
buf_resize(output_buf, 0);
buf_appendf(output_buf, "%s\\Lib\\%s\\um\\", sdk->path10_ptr, sdk->version10_ptr);
switch (platform_type) {
case ZigLLVM_x86:
buf_append_str(output_buf, "x86\\");
break;
case ZigLLVM_x86_64:
buf_append_str(output_buf, "x64\\");
break;
case ZigLLVM_arm:
buf_append_str(output_buf, "arm\\");
break;
default:
zig_panic("Attempted to use vcruntime for non-supported platform.");
}
Buf* tmp_buf = buf_alloc();
buf_init_from_buf(tmp_buf, output_buf);
buf_append_str(tmp_buf, "kernel32.lib");
if (GetFileAttributesA(buf_ptr(tmp_buf)) != INVALID_FILE_ATTRIBUTES) {
return 0;
}
}
{
buf_resize(output_buf, 0);
buf_appendf(output_buf, "%s\\Lib\\%s\\um\\", sdk->path81_ptr, sdk->version81_ptr);
switch (platform_type) {
case ZigLLVM_x86:
buf_append_str(output_buf, "x86\\");
break;
case ZigLLVM_x86_64:
buf_append_str(output_buf, "x64\\");
break;
case ZigLLVM_arm:
buf_append_str(output_buf, "arm\\");
break;
default:
zig_panic("Attempted to use vcruntime for non-supported platform.");
}
Buf* tmp_buf = buf_alloc();
buf_init_from_buf(tmp_buf, output_buf);
buf_append_str(tmp_buf, "kernel32.lib");
if (GetFileAttributesA(buf_ptr(tmp_buf)) != INVALID_FILE_ATTRIBUTES) {
return 0;
}
}
return ErrorFileNotFound;
#else
return ErrorFileNotFound;
#endif
}
#if defined(ZIG_OS_WINDOWS)
// Ported from std/unicode.zig
struct Utf16LeIterator {
uint8_t *bytes;
size_t i;
};
// Ported from std/unicode.zig
static Utf16LeIterator Utf16LeIterator_init(WCHAR *ptr) {
return {(uint8_t*)ptr, 0};
}
// Ported from std/unicode.zig
static Optional<uint32_t> Utf16LeIterator_nextCodepoint(Utf16LeIterator *it) {
if (it->bytes[it->i] == 0 && it->bytes[it->i + 1] == 0)
return {};
uint32_t c0 = ((uint32_t)it->bytes[it->i]) | (((uint32_t)it->bytes[it->i + 1]) << 8);
if ((c0 & ~((uint32_t)0x03ff)) == 0xd800) {
// surrogate pair
it->i += 2;
assert(it->bytes[it->i] != 0 || it->bytes[it->i + 1] != 0);
uint32_t c1 = ((uint32_t)it->bytes[it->i]) | (((uint32_t)it->bytes[it->i + 1]) << 8);
assert((c1 & ~((uint32_t)0x03ff)) == 0xdc00);
it->i += 2;
return Optional<uint32_t>::some(0x10000 + (((c0 & 0x03ff) << 10) | (c1 & 0x03ff)));
} else {
assert((c0 & ~((uint32_t)0x03ff)) != 0xdc00);
it->i += 2;
return Optional<uint32_t>::some(c0);
}
}
// Ported from std/unicode.zig
static uint8_t utf8CodepointSequenceLength(uint32_t c) {
if (c < 0x80) return 1;
if (c < 0x800) return 2;
if (c < 0x10000) return 3;
if (c < 0x110000) return 4;
zig_unreachable();
}
// Ported from std/unicode.zig
static size_t utf8Encode(uint32_t c, Slice<uint8_t> out) {
size_t length = utf8CodepointSequenceLength(c);
assert(out.len >= length);
switch (length) {
// The pattern for each is the same
// - Increasing the initial shift by 6 each time
// - Each time after the first shorten the shifted
// value to a max of 0b111111 (63)
case 1:
out.ptr[0] = c; // Can just do 0 + codepoint for initial range
break;
case 2:
out.ptr[0] = 0b11000000 | (c >> 6);
out.ptr[1] = 0b10000000 | (c & 0b111111);
break;
case 3:
assert(!(0xd800 <= c && c <= 0xdfff));
out.ptr[0] = 0b11100000 | (c >> 12);
out.ptr[1] = 0b10000000 | ((c >> 6) & 0b111111);
out.ptr[2] = 0b10000000 | (c & 0b111111);
break;
case 4:
out.ptr[0] = 0b11110000 | (c >> 18);
out.ptr[1] = 0b10000000 | ((c >> 12) & 0b111111);
out.ptr[2] = 0b10000000 | ((c >> 6) & 0b111111);
out.ptr[3] = 0b10000000 | (c & 0b111111);
break;
default:
zig_unreachable();
}
return length;
}
// Ported from std.unicode.utf16leToUtf8Alloc
static void utf16le_ptr_to_utf8(Buf *out, WCHAR *utf16le) {
// optimistically guess that it will all be ascii.
buf_resize(out, 0);
size_t out_index = 0;
Utf16LeIterator it = Utf16LeIterator_init(utf16le);
for (;;) {
Optional<uint32_t> opt_codepoint = Utf16LeIterator_nextCodepoint(&it);
if (!opt_codepoint.is_some) break;
uint32_t codepoint = opt_codepoint.value;
size_t utf8_len = utf8CodepointSequenceLength(codepoint);
buf_resize(out, buf_len(out) + utf8_len);
utf8Encode(codepoint, {(uint8_t*)buf_ptr(out)+out_index, buf_len(out)-out_index});
out_index += utf8_len;
}
}
#endif
// Ported from std.os.getAppDataDir
Error os_get_app_data_dir(Buf *out_path, const char *appname) {
#if defined(ZIG_OS_WINDOWS)
WCHAR *dir_path_ptr;
switch (SHGetKnownFolderPath(FOLDERID_LocalAppData, KF_FLAG_CREATE, nullptr, &dir_path_ptr)) {
case S_OK:
// defer os.windows.CoTaskMemFree(@ptrCast(*c_void, dir_path_ptr));
utf16le_ptr_to_utf8(out_path, dir_path_ptr);
CoTaskMemFree(dir_path_ptr);
buf_appendf(out_path, "\\%s", appname);
return ErrorNone;
case E_OUTOFMEMORY:
return ErrorNoMem;
default:
return ErrorUnexpected;
}
zig_unreachable();
#elif defined(ZIG_OS_DARWIN)
const char *home_dir = getenv("HOME");
if (home_dir == nullptr) {
// TODO use /etc/passwd
return ErrorFileNotFound;
}
buf_resize(out_path, 0);
buf_appendf(out_path, "%s/Library/Application Support/%s", home_dir, appname);
return ErrorNone;
#elif defined(ZIG_OS_POSIX)
const char *home_dir = getenv("HOME");
if (home_dir == nullptr) {
// TODO use /etc/passwd
return ErrorFileNotFound;
}
buf_resize(out_path, 0);
buf_appendf(out_path, "%s/.local/share/%s", home_dir, appname);
return ErrorNone;
#endif
}
#if defined(ZIG_OS_LINUX) || defined(ZIG_OS_FREEBSD)
static int self_exe_shared_libs_callback(struct dl_phdr_info *info, size_t size, void *data) {
ZigList<Buf *> *libs = reinterpret_cast< ZigList<Buf *> *>(data);
if (info->dlpi_name[0] == '/') {
libs->append(buf_create_from_str(info->dlpi_name));
}
return 0;
}
#endif
Error os_self_exe_shared_libs(ZigList<Buf *> &paths) {
#if defined(ZIG_OS_LINUX) || defined(ZIG_OS_FREEBSD)
paths.resize(0);
dl_iterate_phdr(self_exe_shared_libs_callback, &paths);
return ErrorNone;
#elif defined(ZIG_OS_DARWIN)
paths.resize(0);
uint32_t img_count = _dyld_image_count();
for (uint32_t i = 0; i != img_count; i += 1) {
const char *name = _dyld_get_image_name(i);
paths.append(buf_create_from_str(name));
}
return ErrorNone;
#elif defined(ZIG_OS_WINDOWS)
// zig is built statically on windows, so we can return an empty list
paths.resize(0);
return ErrorNone;
#else
#error unimplemented
#endif
}
Error os_file_open_r(Buf *full_path, OsFile *out_file) {
#if defined(ZIG_OS_WINDOWS)
// TODO use CreateFileW
HANDLE result = CreateFileA(buf_ptr(full_path), GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr);
if (result == INVALID_HANDLE_VALUE) {
DWORD err = GetLastError();
switch (err) {
case ERROR_SHARING_VIOLATION:
return ErrorSharingViolation;
case ERROR_ALREADY_EXISTS:
return ErrorPathAlreadyExists;
case ERROR_FILE_EXISTS:
return ErrorPathAlreadyExists;
case ERROR_FILE_NOT_FOUND:
return ErrorFileNotFound;
case ERROR_PATH_NOT_FOUND:
return ErrorFileNotFound;
case ERROR_ACCESS_DENIED:
return ErrorAccess;
case ERROR_PIPE_BUSY:
return ErrorPipeBusy;
default:
return ErrorUnexpected;
}
}
*out_file = result;
return ErrorNone;
#else
for (;;) {
int fd = open(buf_ptr(full_path), O_RDONLY|O_CLOEXEC);
if (fd == -1) {
switch (errno) {
case EINTR:
continue;
case EINVAL:
zig_unreachable();
case EFAULT:
zig_unreachable();
case EACCES:
return ErrorAccess;
case EISDIR:
return ErrorIsDir;
case ENOENT:
return ErrorFileNotFound;
default:
return ErrorFileSystem;
}
}
*out_file = fd;
return ErrorNone;
}
#endif
}
Error os_file_open_lock_rw(Buf *full_path, OsFile *out_file) {
#if defined(ZIG_OS_WINDOWS)
for (;;) {
HANDLE result = CreateFileA(buf_ptr(full_path), GENERIC_READ | GENERIC_WRITE,
0, nullptr, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, nullptr);
if (result == INVALID_HANDLE_VALUE) {
DWORD err = GetLastError();
switch (err) {
case ERROR_SHARING_VIOLATION:
// TODO wait for the lock instead of sleeping
Sleep(10);
continue;
case ERROR_ALREADY_EXISTS:
return ErrorPathAlreadyExists;
case ERROR_FILE_EXISTS:
return ErrorPathAlreadyExists;
case ERROR_FILE_NOT_FOUND:
return ErrorFileNotFound;
case ERROR_PATH_NOT_FOUND:
return ErrorFileNotFound;
case ERROR_ACCESS_DENIED:
return ErrorAccess;
case ERROR_PIPE_BUSY:
return ErrorPipeBusy;
default:
return ErrorUnexpected;
}
}
*out_file = result;
return ErrorNone;
}
#else
int fd;
for (;;) {
fd = open(buf_ptr(full_path), O_RDWR|O_CLOEXEC|O_CREAT, 0666);
if (fd == -1) {
switch (errno) {
case EINTR:
continue;
case EINVAL:
zig_unreachable();
case EFAULT:
zig_unreachable();
case EACCES:
return ErrorAccess;
case EISDIR:
return ErrorIsDir;
case ENOENT:
return ErrorFileNotFound;
default:
return ErrorFileSystem;
}
}
break;
}
for (;;) {
struct flock lock;
lock.l_type = F_WRLCK;
lock.l_whence = SEEK_SET;
lock.l_start = 0;
lock.l_len = 0;
if (fcntl(fd, F_SETLKW, &lock) == -1) {
switch (errno) {
case EINTR:
continue;
case EBADF:
zig_unreachable();
case EFAULT:
zig_unreachable();
case EINVAL:
zig_unreachable();
default:
close(fd);
return ErrorFileSystem;
}
}
break;
}
*out_file = fd;
return ErrorNone;
#endif
}
Error os_file_mtime(OsFile file, OsTimeStamp *mtime) {
#if defined(ZIG_OS_WINDOWS)
FILETIME last_write_time;
if (!GetFileTime(file, nullptr, nullptr, &last_write_time))
return ErrorUnexpected;
mtime->sec = (((ULONGLONG) last_write_time.dwHighDateTime) << 32) + last_write_time.dwLowDateTime;
mtime->nsec = 0;
return ErrorNone;
#elif defined(ZIG_OS_LINUX) || defined(ZIG_OS_FREEBSD)
struct stat statbuf;
if (fstat(file, &statbuf) == -1)
return ErrorFileSystem;
mtime->sec = statbuf.st_mtim.tv_sec;
mtime->nsec = statbuf.st_mtim.tv_nsec;
return ErrorNone;
#elif defined(ZIG_OS_DARWIN)
struct stat statbuf;
if (fstat(file, &statbuf) == -1)
return ErrorFileSystem;
mtime->sec = statbuf.st_mtimespec.tv_sec;
mtime->nsec = statbuf.st_mtimespec.tv_nsec;
return ErrorNone;
#else
#error unimplemented
#endif
}
Error os_file_read(OsFile file, void *ptr, size_t *len) {
#if defined(ZIG_OS_WINDOWS)
DWORD amt_read;
if (ReadFile(file, ptr, *len, &amt_read, nullptr) == 0)
return ErrorUnexpected;
*len = amt_read;
return ErrorNone;
#else
for (;;) {
ssize_t rc = read(file, ptr, *len);
if (rc == -1) {
switch (errno) {
case EINTR:
continue;
case EBADF:
zig_unreachable();
case EFAULT:
zig_unreachable();
case EISDIR:
return ErrorIsDir;
default:
return ErrorFileSystem;
}
}
*len = rc;
return ErrorNone;
}
#endif
}
Error os_file_read_all(OsFile file, Buf *contents) {
Error err;
size_t index = 0;
for (;;) {
size_t amt = buf_len(contents) - index;
if (amt < 4096) {
buf_resize(contents, buf_len(contents) + (4096 - amt));
amt = buf_len(contents) - index;
}
if ((err = os_file_read(file, buf_ptr(contents) + index, &amt)))
return err;
if (amt == 0) {
buf_resize(contents, index);
return ErrorNone;
}
index += amt;
}
}
Error os_file_overwrite(OsFile file, Buf *contents) {
#if defined(ZIG_OS_WINDOWS)
if (SetFilePointer(file, 0, nullptr, FILE_BEGIN) == INVALID_SET_FILE_POINTER)
return ErrorFileSystem;
if (!SetEndOfFile(file))
return ErrorFileSystem;
DWORD bytes_written;
if (!WriteFile(file, buf_ptr(contents), buf_len(contents), &bytes_written, nullptr))
return ErrorFileSystem;
return ErrorNone;
#else
if (lseek(file, 0, SEEK_SET) == -1)
return ErrorFileSystem;
if (ftruncate(file, 0) == -1)
return ErrorFileSystem;
for (;;) {
if (write(file, buf_ptr(contents), buf_len(contents)) == -1) {
switch (errno) {
case EINTR:
continue;
case EINVAL:
zig_unreachable();
case EBADF:
zig_unreachable();
default:
return ErrorFileSystem;
}
}
return ErrorNone;
}
#endif
}
void os_file_close(OsFile file) {
#if defined(ZIG_OS_WINDOWS)
CloseHandle(file);
#else
close(file);
#endif
}
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