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launcher.c
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/*
* launcher.c
* Copyright (C) 2017 Kovid Goyal <kovid at kovidgoyal.net>
*
* Distributed under terms of the GPL3 license.
*/
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <libgen.h>
#include <string.h>
#include <errno.h>
#include <stdbool.h>
#ifdef __APPLE__
#include <mach-o/dyld.h>
#include <sys/syslimits.h>
#include <sys/stat.h>
#else
#include <limits.h>
#endif
#include <Python.h>
#include <wchar.h>
#define MAX_ARGC 1024
#ifndef KITTY_LIB_PATH
#define KITTY_LIB_PATH "../.."
#endif
#ifndef KITTY_LIB_DIR_NAME
#define KITTY_LIB_DIR_NAME "lib"
#endif
#ifndef __FreeBSD__
static inline bool
safe_realpath(const char* src, char *buf, size_t buf_sz) {
char* ans = realpath(src, NULL);
if (ans == NULL) return false;
snprintf(buf, buf_sz, "%s", ans);
free(ans);
return true;
}
#endif
static inline void
set_xoptions(const wchar_t *exe_dir, const char *lc_ctype, bool from_source) {
wchar_t buf[PATH_MAX+1] = {0};
swprintf(buf, PATH_MAX, L"bundle_exe_dir=%ls", exe_dir);
PySys_AddXOption(buf);
if (from_source) PySys_AddXOption(L"kitty_from_source=1");
if (lc_ctype) {
swprintf(buf, PATH_MAX, L"lc_ctype_before_python=%s", lc_ctype);
PySys_AddXOption(buf);
}
}
#ifdef FOR_BUNDLE
static int run_embedded(const char* exe_dir_, const char *libpath, int argc, wchar_t **argv, const char *lc_ctype) {
int num;
Py_NoSiteFlag = 1;
Py_FrozenFlag = 1;
Py_IgnoreEnvironmentFlag = 1;
Py_DontWriteBytecodeFlag = 1;
Py_NoUserSiteDirectory = 1;
Py_IsolatedFlag = 1;
Py_SetProgramName(L"kitty");
int ret = 1;
wchar_t *exe_dir = Py_DecodeLocale(exe_dir_, NULL);
if (exe_dir == NULL) { fprintf(stderr, "Fatal error: cannot decode exe_dir\n"); return 1; }
wchar_t stdlib[PATH_MAX+1] = {0};
#ifdef __APPLE__
const char *python_relpath = "../Resources/Python/lib";
#else
const char *python_relpath = "../" KITTY_LIB_DIR_NAME;
#endif
num = swprintf(stdlib, PATH_MAX, L"%ls/%s/python%s:%ls/%s/python%s/lib-dynload:%ls/%s/python%s/site-packages",
exe_dir, python_relpath, PYVER,
exe_dir, python_relpath, PYVER,
exe_dir, python_relpath, PYVER
);
if (num < 0 || num >= PATH_MAX) { fprintf(stderr, "Failed to create path to python stdlib\n"); return 1; }
Py_SetPath(stdlib);
Py_Initialize();
set_xoptions(exe_dir, lc_ctype, false);
PyMem_RawFree(exe_dir);
PySys_SetArgvEx(argc - 1, argv + 1, 0);
PySys_SetObject("frozen", Py_True);
PyObject *kitty = PyUnicode_FromString(libpath);
if (kitty == NULL) { fprintf(stderr, "Failed to allocate python kitty lib object\n"); goto end; }
PyObject *runpy = PyImport_ImportModule("runpy");
if (runpy == NULL) { PyErr_Print(); fprintf(stderr, "Unable to import runpy\n"); Py_CLEAR(kitty); goto end; }
PyObject *run_name = PyUnicode_FromString("__main__");
if (run_name == NULL) { fprintf(stderr, "Failed to allocate run_name\n"); goto end; }
PyObject *res = PyObject_CallMethod(runpy, "run_path", "OOO", kitty, Py_None, run_name);
Py_CLEAR(runpy); Py_CLEAR(kitty); Py_CLEAR(run_name);
if (res == NULL) PyErr_Print();
else { ret = 0; Py_CLEAR(res); }
end:
if (Py_FinalizeEx() < 0) ret = 120;
return ret;
}
#else
static int run_embedded(const char* exe_dir_, const char *libpath, int argc, wchar_t **argv, const char *lc_ctype) {
(void)libpath;
wchar_t *exe_dir = Py_DecodeLocale(exe_dir_, NULL);
if (exe_dir == NULL) { fprintf(stderr, "Fatal error: cannot decode exe_dir: %s\n", exe_dir_); return 1; }
bool from_source = false;
#ifdef FROM_SOURCE
from_source = true;
#endif
set_xoptions(exe_dir, lc_ctype, from_source);
PyMem_RawFree(exe_dir);
return Py_Main(argc, argv);
}
#endif
// read_exe_path() {{{
#ifdef __APPLE__
static inline bool
read_exe_path(char *exe, size_t buf_sz) {
(void)buf_sz;
uint32_t size = PATH_MAX;
char apple[PATH_MAX+1] = {0};
if (_NSGetExecutablePath(apple, &size) != 0) { fprintf(stderr, "Failed to get path to executable\n"); return false; }
if (!safe_realpath(apple, exe, buf_sz)) { fprintf(stderr, "realpath() failed on the executable's path\n"); return false; }
return true;
}
#elif defined(__FreeBSD__)
#include <sys/param.h>
#include <sys/sysctl.h>
static inline bool
read_exe_path(char *exe, size_t buf_sz) {
int name[] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
size_t length = buf_sz;
int error = sysctl(name, 4, exe, &length, NULL, 0);
if (error < 0 || length <= 1) {
fprintf(stderr, "failed to get path to executable, sysctl() failed\n");
return false;
}
return true;
}
#elif defined(__NetBSD__)
static inline bool
read_exe_path(char *exe, size_t buf_sz) {
if (!safe_realpath("/proc/curproc/exe", exe, buf_sz)) { fprintf(stderr, "Failed to read /proc/curproc/exe\n"); return false; }
return true;
}
#elif defined(__OpenBSD__)
static inline bool
read_exe_path(char *exe, size_t buf_sz) {
const char *path = getenv("PATH");
if (!path) { fprintf(stderr, "No PATH environment variable set, aborting\n"); return false; }
char buf[PATH_MAX + 1] = {0};
strncpy(buf, path, PATH_MAX);
char *token = strtok(buf, ":");
while (token != NULL) {
char q[PATH_MAX + 1] = {0};
snprintf(q, PATH_MAX, "%s/kitty", token);
if (safe_realpath(q, exe, buf_sz)) return true;
token = strtok(NULL, ":");
}
fprintf(stderr, "kitty not found in PATH aborting\n");
return false;
}
#else
static inline bool
read_exe_path(char *exe, size_t buf_sz) {
if (!safe_realpath("/proc/self/exe", exe, buf_sz)) { fprintf(stderr, "Failed to read /proc/self/exe\n"); return false; }
return true;
}
#endif // }}}
int main(int argc, char *argv[]) {
char exe[PATH_MAX+1] = {0};
const char *lc_ctype = NULL;
#ifdef __APPLE__
lc_ctype = getenv("LC_CTYPE");
#endif
if (!read_exe_path(exe, sizeof(exe))) return 1;
char *exe_dir = dirname(exe);
int num, num_args, i, ret=0;
char lib[PATH_MAX+1] = {0};
char *final_argv[MAX_ARGC + 1] = {0};
wchar_t *argvw[MAX_ARGC + 1] = {0};
num = snprintf(lib, PATH_MAX, "%s/%s", exe_dir, KITTY_LIB_PATH);
if (num < 0 || num >= PATH_MAX) { fprintf(stderr, "Failed to create path to kitty lib\n"); return 1; }
final_argv[0] = exe;
final_argv[1] = lib;
for (i = 1, num_args=2; i < argc && i + 1 <= MAX_ARGC; i++) {
final_argv[i+1] = argv[i];
num_args++;
}
#if PY_VERSION_HEX >= 0x03070000
// Always use UTF-8 mode, see https://github.com/kovidgoyal/kitty/issues/924
Py_UTF8Mode = 1;
#endif
for (i = 0; i < num_args; i++) {
argvw[i] = Py_DecodeLocale(final_argv[i], NULL);
if (argvw[i] == NULL) {
fprintf(stderr, "Fatal error: cannot decode argv[%d]\n", i);
ret = 1; goto end;
}
}
if (lc_ctype) lc_ctype = strdup(lc_ctype);
ret = run_embedded(exe_dir, lib, num_args, argvw, lc_ctype);
if (lc_ctype) free((void*)lc_ctype);
end:
for (i = 0; i < num_args; i++) { if(argvw[i]) PyMem_RawFree(argvw[i]); }
return ret;
}