mirror of
https://github.com/kovidgoyal/kitty.git
synced 2024-08-16 18:10:32 +03:00
285 lines
8.9 KiB
C
285 lines
8.9 KiB
C
/*
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* launcher.c
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* Copyright (C) 2017 Kovid Goyal <kovid at kovidgoyal.net>
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*
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* Distributed under terms of the GPL3 license.
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <libgen.h>
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#include <string.h>
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#include <errno.h>
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#include <stdbool.h>
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#ifdef __APPLE__
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#include <mach-o/dyld.h>
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#include <sys/syslimits.h>
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#include <sys/stat.h>
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#else
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#include <limits.h>
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#endif
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#include <Python.h>
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#include <wchar.h>
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#include <stdbool.h>
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#ifndef KITTY_LIB_PATH
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#define KITTY_LIB_PATH "../.."
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#endif
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#ifndef KITTY_LIB_DIR_NAME
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#define KITTY_LIB_DIR_NAME "lib"
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#endif
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static inline void cleanup_free(void *p) { free(*(void**) p); }
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#define FREE_AFTER_FUNCTION __attribute__((cleanup(cleanup_free)))
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#ifndef __FreeBSD__
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static inline bool
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safe_realpath(const char* src, char *buf, size_t buf_sz) {
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FREE_AFTER_FUNCTION char* ans = realpath(src, NULL);
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if (ans == NULL) return false;
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snprintf(buf, buf_sz, "%s", ans);
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return true;
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}
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#endif
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static inline bool
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set_xoptions(const char *exe_dir_c, const char *lc_ctype, bool from_source) {
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wchar_t *exe_dir = Py_DecodeLocale(exe_dir_c, NULL);
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if (exe_dir == NULL) { fprintf(stderr, "Fatal error: cannot decode exe_dir: %s\n", exe_dir_c); return false; }
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wchar_t buf[PATH_MAX+1] = {0};
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swprintf(buf, PATH_MAX, L"bundle_exe_dir=%ls", exe_dir);
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PySys_AddXOption(buf);
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PyMem_RawFree(exe_dir);
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if (from_source) PySys_AddXOption(L"kitty_from_source=1");
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if (lc_ctype) {
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swprintf(buf, PATH_MAX, L"lc_ctype_before_python=%s", lc_ctype);
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PySys_AddXOption(buf);
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}
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return true;
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}
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typedef struct {
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const char *exe, *exe_dir, *lc_ctype, *lib_dir;
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char **argv;
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int argc;
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} RunData;
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#ifdef FOR_BUNDLE
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#include <bypy-freeze.h>
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static bool
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canonicalize_path(const char *srcpath, char *dstpath, size_t sz) {
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// remove . and .. path segments
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bool ok = false;
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size_t plen = strlen(srcpath) + 1, chk;
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FREE_AFTER_FUNCTION char *wtmp = malloc(plen);
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FREE_AFTER_FUNCTION char **tokv = malloc(sizeof(char*) * plen);
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if (!wtmp || !tokv) goto end;
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char *s, *tok, *sav;
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bool relpath = *srcpath != '/';
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// use a buffer as strtok modifies its input
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memcpy(wtmp, srcpath, plen);
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tok = strtok_r(wtmp, "/", &sav);
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int ti = 0;
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while (tok != NULL) {
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if (strcmp(tok, "..") == 0) {
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if (ti > 0) ti--;
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} else if (strcmp(tok, ".") != 0) {
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tokv[ti++] = tok;
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}
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tok = strtok_r(NULL, "/", &sav);
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}
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chk = 0;
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s = dstpath;
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for (int i = 0; i < ti; i++) {
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size_t token_sz = strlen(tokv[i]);
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if (i > 0 || !relpath) {
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if (++chk >= sz) goto end;
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*s++ = '/';
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}
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chk += token_sz;
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if (chk >= sz) goto end;
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memcpy(s, tokv[i], token_sz);
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s += token_sz;
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}
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if (s == dstpath) {
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if (++chk >= sz) goto end;
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*s++ = relpath ? '.' : '/';
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}
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*s = '\0';
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ok = true;
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end:
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return ok;
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}
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static bool
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canonicalize_path_wide(const char *srcpath, wchar_t *dest, size_t sz) {
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char buf[sz + 1];
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bool ret = canonicalize_path(srcpath, buf, sz);
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buf[sz] = 0;
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mbstowcs(dest, buf, sz - 1);
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dest[sz-1] = 0;
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return ret;
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}
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static int
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run_embedded(const RunData run_data) {
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bypy_pre_initialize_interpreter(false);
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char extensions_dir_full[PATH_MAX+1] = {0}, python_home_full[PATH_MAX+1] = {0};
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#ifdef __APPLE__
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const char *python_relpath = "../Resources/Python/lib";
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#else
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const char *python_relpath = "../" KITTY_LIB_DIR_NAME;
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#endif
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int num = snprintf(extensions_dir_full, PATH_MAX, "%s/%s/kitty-extensions", run_data.exe_dir, python_relpath);
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if (num < 0 || num >= PATH_MAX) { fprintf(stderr, "Failed to create path to extensions_dir: %s/%s\n", run_data.exe_dir, python_relpath); return 1; }
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wchar_t extensions_dir[num+2];
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if (!canonicalize_path_wide(extensions_dir_full, extensions_dir, num+1)) {
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fprintf(stderr, "Failed to canonicalize the path: %s\n", extensions_dir_full); return 1; }
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num = snprintf(python_home_full, PATH_MAX, "%s/%s/python%s", run_data.exe_dir, python_relpath, PYVER);
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if (num < 0 || num >= PATH_MAX) { fprintf(stderr, "Failed to create path to python home: %s/%s\n", run_data.exe_dir, python_relpath); return 1; }
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wchar_t python_home[num+2];
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if (!canonicalize_path_wide(python_home_full, python_home, num+1)) {
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fprintf(stderr, "Failed to canonicalize the path: %s\n", python_home_full); return 1; }
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bypy_initialize_interpreter(L"kitty", python_home, L"kitty_main", extensions_dir, run_data.argc, run_data.argv);
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if (!set_xoptions(run_data.exe_dir, run_data.lc_ctype, false)) return 1;
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set_sys_bool("frozen", true);
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set_sys_string("kitty_extensions_dir", extensions_dir);
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return bypy_run_interpreter();
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}
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#else
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static int
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free_argv(wchar_t **argv) {
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wchar_t **p = argv;
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while (*p) { PyMem_RawFree(*p); p++; }
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free(argv);
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return 1;
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}
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static int
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run_embedded(const RunData run_data) {
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bool from_source = false;
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#ifdef FROM_SOURCE
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from_source = true;
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#endif
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if (!set_xoptions(run_data.exe_dir, run_data.lc_ctype, from_source)) return 1;
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int argc = run_data.argc + 1;
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wchar_t **argv = calloc(argc, sizeof(wchar_t*));
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if (!argv) { fprintf(stderr, "Out of memory creating argv\n"); return 1; }
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memset(argv, 0, sizeof(wchar_t*) * argc);
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argv[0] = Py_DecodeLocale(run_data.exe, NULL);
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if (!argv[0]) { fprintf(stderr, "Failed to decode path to exe\n"); return free_argv(argv); }
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argv[1] = Py_DecodeLocale(run_data.lib_dir, NULL);
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if (!argv[1]) { fprintf(stderr, "Failed to decode path to lib_dir\n"); return free_argv(argv); }
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for (int i=1; i < run_data.argc; i++) {
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argv[i+1] = Py_DecodeLocale(run_data.argv[i], NULL);
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if (!argv[i+1]) { fprintf(stderr, "Failed to decode the command line argument: %s\n", run_data.argv[i]); return free_argv(argv); }
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}
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int ret = Py_Main(argc, argv);
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// we cannot free argv properly as Py_Main modifies it
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free(argv);
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return ret;
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}
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#endif
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// read_exe_path() {{{
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#ifdef __APPLE__
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static inline bool
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read_exe_path(char *exe, size_t buf_sz) {
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(void)buf_sz;
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uint32_t size = PATH_MAX;
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char apple[PATH_MAX+1] = {0};
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if (_NSGetExecutablePath(apple, &size) != 0) { fprintf(stderr, "Failed to get path to executable\n"); return false; }
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if (!safe_realpath(apple, exe, buf_sz)) { fprintf(stderr, "realpath() failed on the executable's path\n"); return false; }
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return true;
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}
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#elif defined(__FreeBSD__)
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#include <sys/param.h>
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#include <sys/sysctl.h>
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static inline bool
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read_exe_path(char *exe, size_t buf_sz) {
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int name[] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
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size_t length = buf_sz;
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int error = sysctl(name, 4, exe, &length, NULL, 0);
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if (error < 0 || length <= 1) {
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fprintf(stderr, "failed to get path to executable, sysctl() failed\n");
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return false;
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}
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return true;
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}
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#elif defined(__NetBSD__)
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static inline bool
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read_exe_path(char *exe, size_t buf_sz) {
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if (!safe_realpath("/proc/curproc/exe", exe, buf_sz)) { fprintf(stderr, "Failed to read /proc/curproc/exe\n"); return false; }
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return true;
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}
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#elif defined(__OpenBSD__)
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static inline bool
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read_exe_path(char *exe, size_t buf_sz) {
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const char *path = getenv("PATH");
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if (!path) { fprintf(stderr, "No PATH environment variable set, aborting\n"); return false; }
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char buf[PATH_MAX + 1] = {0};
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strncpy(buf, path, PATH_MAX);
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char *token = strtok(buf, ":");
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while (token != NULL) {
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char q[PATH_MAX + 1] = {0};
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snprintf(q, PATH_MAX, "%s/kitty", token);
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if (safe_realpath(q, exe, buf_sz)) return true;
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token = strtok(NULL, ":");
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}
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fprintf(stderr, "kitty not found in PATH aborting\n");
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return false;
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}
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#else
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static inline bool
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read_exe_path(char *exe, size_t buf_sz) {
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if (!safe_realpath("/proc/self/exe", exe, buf_sz)) { fprintf(stderr, "Failed to read /proc/self/exe\n"); return false; }
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return true;
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}
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#endif // }}}
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int main(int argc, char *argv[]) {
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char exe[PATH_MAX+1] = {0};
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char exe_dir_buf[PATH_MAX+1] = {0};
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FREE_AFTER_FUNCTION const char *lc_ctype = NULL;
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#ifdef __APPLE__
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lc_ctype = getenv("LC_CTYPE");
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#endif
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if (!read_exe_path(exe, sizeof(exe))) return 1;
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strncpy(exe_dir_buf, exe, sizeof(exe_dir_buf));
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char *exe_dir = dirname(exe_dir_buf);
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int num, ret=0;
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char lib[PATH_MAX+1] = {0};
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num = snprintf(lib, PATH_MAX, "%s/%s", exe_dir, KITTY_LIB_PATH);
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if (num < 0 || num >= PATH_MAX) { fprintf(stderr, "Failed to create path to kitty lib\n"); return 1; }
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#if PY_VERSION_HEX >= 0x03070000
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// Always use UTF-8 mode, see https://github.com/kovidgoyal/kitty/issues/924
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Py_UTF8Mode = 1;
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#endif
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if (lc_ctype) lc_ctype = strdup(lc_ctype);
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RunData run_data = {.exe = exe, .exe_dir = exe_dir, .lib_dir = lib, .argc = argc, .argv = argv, .lc_ctype = lc_ctype};
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ret = run_embedded(run_data);
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return ret;
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}
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