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os.cpp
1435 lines (1276 loc) · 42.2 KB
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os.cpp
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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
#include <windows.h>
#include <io.h>
#include <fcntl.h>
#include "windows_com.hpp"
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>
#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>
#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) {
pid_t pid = fork();
if (pid == -1)
zig_panic("fork failed");
if (pid == 0) {
// child
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));
zig_panic("execvp failed: %s", strerror(errno));
} else {
// parent
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;
if (os_is_sep(buf_ptr(full_path)[last_index])) {
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);
}
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) {
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
}
bool os_path_is_absolute(Buf *path) {
#if defined(ZIG_OS_WINDOWS)
if (buf_starts_with_str(path, "/") || buf_starts_with_str(path, "\\"))
return true;
if (buf_len(path) >= 3 && buf_ptr(path)[1] == ':')
return true;
return false;
#elif defined(ZIG_OS_POSIX)
return buf_ptr(path)[0] == '/';
#else
#error "missing os_path_is_absolute implementation"
#endif
}
void os_path_resolve(Buf *ref_path, Buf *target_path, Buf *out_abs_path) {
if (os_path_is_absolute(target_path)) {
buf_init_from_buf(out_abs_path, target_path);
return;
}
os_path_join(ref_path, target_path, out_abs_path);
return;
}
int 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 0;
} else {
return ErrorFileSystem;
}
}
buf_resize(out_buf, actual_buf_len + buf_size);
first_read = false;
}
zig_unreachable();
}
int os_file_exists(Buf *full_path, bool *result) {
#if defined(ZIG_OS_WINDOWS)
*result = GetFileAttributes(buf_ptr(full_path)) != INVALID_FILE_ATTRIBUTES;
return 0;
#else
*result = access(buf_ptr(full_path), F_OK) != -1;
return 0;
#endif
}
#if defined(ZIG_OS_POSIX)
static int 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");
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");
os_fetch_file(stdout_f, out_stdout, false);
os_fetch_file(stderr_f, out_stderr, false);
fclose(stdout_f);
fclose(stderr_f);
return 0;
}
}
#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 int 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 0;
}
#endif
int 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("open 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");
}
int 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 0;
}
}
}
int 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;
}
}
int result = os_fetch_file(f, out_contents, skip_shebang);
fclose(f);
return result;
}
int os_get_cwd(Buf *out_cwd) {
#if defined(ZIG_OS_WINDOWS)
buf_resize(out_cwd, 4096);
if (GetCurrentDirectory(buf_len(out_cwd), buf_ptr(out_cwd)) == 0) {
zig_panic("GetCurrentDirectory failed");
}
return 0;
#elif defined(ZIG_OS_POSIX)
int err = ERANGE;
buf_resize(out_cwd, 512);
while (err == ERANGE) {
buf_resize(out_cwd, buf_len(out_cwd) * 2);
err = getcwd(buf_ptr(out_cwd), buf_len(out_cwd)) ? 0 : errno;
}
if (err)
zig_panic("unable to get cwd: %s", strerror(err));
return 0;
#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) {
#if defined(__MINGW32__)
return false;
#else
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
}
#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 int 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 0;
}
#endif
#if defined(ZIG_OS_WINDOWS)
static int 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 0;
}
#endif
int 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
}
#if defined(ZIG_OS_POSIX)
int os_get_global_cache_directory(Buf *out_tmp_path) {
const char *tmp_dir = getenv("TMPDIR");
if (!tmp_dir) {
tmp_dir = P_tmpdir;
}
Buf *tmp_dir_buf = buf_create_from_str(tmp_dir);
Buf *cache_dirname_buf = buf_create_from_str("zig-cache");
buf_resize(out_tmp_path, 0);
os_path_join(tmp_dir_buf, cache_dirname_buf, out_tmp_path);
buf_deinit(tmp_dir_buf);
buf_deinit(cache_dirname_buf);
return 0;
}
#endif
#if defined(ZIG_OS_WINDOWS)
int os_get_global_cache_directory(Buf *out_tmp_path) {
char tmp_dir[MAX_PATH + 1];
if (GetTempPath(MAX_PATH, tmp_dir) == 0) {
zig_panic("GetTempPath failed");
}
Buf *tmp_dir_buf = buf_create_from_str(tmp_dir);
Buf *cache_dirname_buf = buf_create_from_str("zig-cache");
buf_resize(out_tmp_path, 0);
os_path_join(tmp_dir_buf, cache_dirname_buf, out_tmp_path);
buf_deinit(tmp_dir_buf);
buf_deinit(cache_dirname_buf);
return 0;
}
#endif
int os_delete_file(Buf *path) {
if (remove(buf_ptr(path))) {
return ErrorFileSystem;
} else {
return 0;
}
}
int os_rename(Buf *src_path, Buf *dest_path) {
if (buf_eql_buf(src_path, dest_path)) {
return 0;
}
#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 0;
}
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
}
int os_make_path(Buf *path) {
Buf *resolved_path = buf_alloc();
os_path_resolve(buf_create_from_str("."), path, resolved_path);
size_t end_index = buf_len(resolved_path);
int 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 0;
} 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 0;
// 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 0;
}
int 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 0;
#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 0;
#endif
}
int os_init(void) {
srand((unsigned)time(NULL));
#if defined(ZIG_OS_WINDOWS)
_setmode(fileno(stdout), _O_BINARY);
_setmode(fileno(stderr), _O_BINARY);
#endif
#if defined(ZIG_OS_WINDOWS)
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;
}
int 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 0;
}
buf_resize(out_path, buf_len(out_path) * 2);
}
#elif defined(ZIG_OS_DARWIN)
uint32_t u32_len = 0;
int ret1 = _NSGetExecutablePath(nullptr, &u32_len);
assert(ret1 != 0);
buf_resize(out_path, u32_len);
int ret2 = _NSGetExecutablePath(buf_ptr(out_path), &u32_len);
assert(ret2 == 0);
return 0;
#elif defined(ZIG_OS_LINUX)
buf_resize(out_path, 256);