2 * main() entry point for a stand-alone SBCL image
6 * This software is part of the SBCL system. See the README file for
9 * This software is derived from the CMU CL system, which was
10 * written at Carnegie Mellon University and released into the
11 * public domain. The software is in the public domain and is
12 * provided with absolutely no warranty. See the COPYING and CREDITS
13 * files for more information.
21 #include <sys/types.h>
26 #include <sys/param.h>
32 #if defined(SVR4) || defined(__linux__)
43 #include "interrupt.h"
54 #include "genesis/static-symbols.h"
55 #include "genesis/symbol.h"
64 #define SBCL_HOME "/usr/local/lib/sbcl/"
68 /* SIGINT handler that invokes the monitor (for when Lisp isn't up to it) */
70 sigint_handler(int signal, siginfo_t *info, void *void_context)
72 lose("\nSIGINT hit at 0x%08lX\n",
73 (unsigned long) *os_context_pc_addr(void_context));
76 /* (This is not static, because we want to be able to call it from
81 SHOW("entering sigint_init()");
82 install_handler(SIGINT, sigint_handler);
83 SHOW("leaving sigint_init()");
87 * helper functions for dealing with command line args
91 successful_malloc(size_t size)
93 void* result = malloc(size);
95 lose("malloc failure");
99 return (void *) NULL; /* dummy value: return something ... */
103 copied_string(char *string)
105 return strcpy(successful_malloc(1+strlen(string)), string);
109 copied_existing_filename_or_null(char *filename)
111 struct stat filename_stat;
112 if (stat(filename, &filename_stat)) { /* if failure */
115 return copied_string(filename);
119 /* Convert a null-terminated array of null-terminated strings (e.g.
120 * argv or envp) into a Lisp list of Lisp base-strings. */
122 alloc_base_string_list(char *array_ptr[])
125 return alloc_cons(alloc_base_string(*array_ptr),
126 alloc_base_string_list(1 + array_ptr));
132 /* miscellaneous chattiness */
138 "SBCL is a Common Lisp programming environment. Ordinarily you shouldn't\n\
139 need command line options when you invoke it interactively: you can just\n\
140 start it and work with the customary Lisp READ-EVAL-PRINT loop.\n\
142 One option idiom which is sometimes useful interactively (e.g. when\n\
143 exercising a test case for a bug report) is\n\
144 sbcl --sysinit /dev/null --userinit /dev/null\n\
145 to keep SBCL from reading any initialization files at startup. And some\n\
146 people like to suppress the default startup message:\n\
149 Other options can be useful when you're running SBCL noninteractively,\n\
150 e.g. from a script, or if you have a strange system configuration, so\n\
151 that SBCL can't by default find one of the files it needs. For\n\
152 information on such options, see the sbcl(1) man page.\n\
154 More information on SBCL can be found on its man page, or at\n\
155 <http://sbcl.sf.net/>.\n");
161 printf("SBCL %s\n", SBCL_VERSION_STRING);
168 "This is SBCL %s, an implementation of ANSI Common Lisp.\n\
170 SBCL is derived from the CMU CL system created at Carnegie Mellon University.\n\
171 Besides software and documentation originally created at Carnegie Mellon\n\
172 University, SBCL contains some software originally from the Massachusetts\n\
173 Institute of Technology, Symbolics Incorporated, and Xerox Corporation, and\n\
174 material contributed by volunteers since the release of CMU CL into the\n\
175 public domain. See the CREDITS file in the distribution for more information.\n\
177 SBCL is a free software system, provided as is, with absolutely no warranty.\n\
178 It is mostly in the public domain, but also includes some software copyrighted\n\
179 Massachusetts Institute of Technology, 1986;\n\
180 Symbolics, Inc., 1989, 1990, 1991, 1992; and\n\
181 Xerox Corporation, 1985, 1986, 1987, 1988, 1989, 1990\n\
182 used under BSD-style licenses allowing copying only under certain conditions.\n\
183 See the COPYING file in the distribution for more information.\n\
185 More information about SBCL is available at <http://sbcl.sourceforge.net/>.\n\
186 ", SBCL_VERSION_STRING);
193 main(int argc, char *argv[], char *envp[])
195 /* the name of the core file we're to execute. Note that this is
196 * a malloc'ed string which should be freed eventually. */
199 /* other command line options */
200 boolean noinform = 0;
201 boolean end_runtime_options = 0;
203 lispobj initial_function;
205 /* KLUDGE: os_vm_page_size is set by os_init(), and on some
206 * systems (e.g. Alpha) arch_init() needs need os_vm_page_size, so
207 * it must follow os_init(). -- WHN 2000-01-26 */
213 /* Parse our part of the command line (aka "runtime options"),
214 * stripping out those options that we handle. */
217 while (argi < argc) {
218 char *arg = argv[argi];
219 if (0 == strcmp(arg, "--noinform")) {
222 } else if (0 == strcmp(arg, "--core")) {
224 lose("more than one core file specified");
228 lose("missing filename for --core argument");
230 core = copied_string(argv[argi]);
233 } else if (0 == strcmp(arg, "--help")) {
234 /* I think this is the (or a) usual convention: upon
235 * seeing "--help" we immediately print our help
236 * string and exit, ignoring everything else. */
239 } else if (0 == strcmp(arg, "--version")) {
240 /* As in "--help" case, I think this is expected. */
243 } else if (0 == strcmp(arg, "--end-runtime-options")) {
244 end_runtime_options = 1;
248 /* This option was unrecognized as a runtime option,
249 * so it must be a toplevel option or a user option,
250 * so we must be past the end of the runtime option
255 /* This is where we strip out those options that we handle. We
256 * also take this opportunity to make sure that we don't find
257 * an out-of-place "--end-runtime-options" option. */
259 char *argi0 = argv[argi];
261 while (argi < argc) {
262 char *arg = argv[argi++];
263 /* If we encounter --end-runtime-options for the first
264 * time after the point where we had to give up on
265 * runtime options, then the point where we had to
266 * give up on runtime options must've been a user
268 if (!end_runtime_options &&
269 0 == strcmp(arg, "--end-runtime-options")) {
270 lose("bad runtime option \"%s\"", argi0);
279 /* If no core file was specified, look for one. */
281 char *sbcl_home = getenv("SBCL_HOME");
283 char *stem = "/sbcl.core";
284 if(!sbcl_home) sbcl_home = SBCL_HOME;
285 lookhere = (char *) calloc(strlen(sbcl_home) +
289 sprintf(lookhere, "%s%s", sbcl_home, stem);
290 core = copied_existing_filename_or_null(lookhere);
293 lose("can't find core file");
296 /* Make sure that SBCL_HOME is set, no matter where the core was
298 if (!getenv("SBCL_HOME")) {
299 char *envstring, *copied_core, *dir;
300 char *stem = "SBCL_HOME=";
301 copied_core = copied_string(core);
302 dir = dirname(copied_core);
303 envstring = (char *) calloc(strlen(stem) +
307 sprintf(envstring, "%s%s", stem, dir);
317 #if defined(SVR4) || defined(__linux__)
321 define_var("nil", NIL, 1);
322 define_var("t", T, 1);
324 set_lossage_handler(monitor_or_something);
328 initial_function = load_core_file(core);
329 if (initial_function == NIL) {
330 lose("couldn't find initial function");
332 SHOW("freeing core");
335 gc_initialize_pointers();
338 arch_install_interrupt_handlers();
339 os_install_interrupt_handlers();
341 /* Convert remaining argv values to something that Lisp can grok. */
342 SHOW("setting POSIX-ARGV symbol value");
343 SetSymbolValue(POSIX_ARGV, alloc_base_string_list(argv),0);
345 /* Install a handler to pick off SIGINT until the Lisp system gets
346 * far enough along to install its own handler. */
349 FSHOW((stderr, "/funcalling initial_function=0x%lx\n", initial_function));
350 create_thread(initial_function);
351 /* in a unithread build, create_thread never returns */
352 #ifdef LISP_FEATURE_SB_THREAD
357 #ifdef LISP_FEATURE_SB_THREAD
359 /* this is being pared down as time goes on; eventually we want to get
360 * to the point that we have no parent loop at all and the parent
361 * thread runs Lisp just like any other */
363 static void /* noreturn */ parent_loop(void)
370 sigemptyset(&sigset);
371 sa.sa_handler=SIG_IGN;
374 sigaction(SIGINT, &sa, 0); /* ^c should go to the lisp thread instead */
375 sigaction(SIG_THREAD_EXIT, &sa, 0);
376 sigaction(SIGCHLD, &sa, 0);
378 while(!all_threads) {
381 while(all_threads && (pid=waitpid(-1,&status,__WALL))) {
384 if(errno == EINTR) continue;
385 fprintf(stderr,"waitpid: %s\n",strerror(errno));
387 else if(WIFEXITED(status) || WIFSIGNALED(status)) {
388 th=find_thread_by_pid(pid);
391 if(!all_threads) break;
394 exit(WEXITSTATUS(status));