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\
169 More information about SBCL is available at <http://www.sbcl.org/>.
171 SBCL is free software, provided as is, with absolutely no warranty.\n\
172 It is mostly in the public domain; some portions are provided under\n\
173 BSD-style licenses. See the CREDITS and COPYING files in the\n\
174 distribution for more information.\n\
175 ", SBCL_VERSION_STRING);
182 main(int argc, char *argv[], char *envp[])
184 /* the name of the core file we're to execute. Note that this is
185 * a malloc'ed string which should be freed eventually. */
188 /* other command line options */
189 boolean noinform = 0;
190 boolean end_runtime_options = 0;
192 lispobj initial_function;
194 /* KLUDGE: os_vm_page_size is set by os_init(), and on some
195 * systems (e.g. Alpha) arch_init() needs need os_vm_page_size, so
196 * it must follow os_init(). -- WHN 2000-01-26 */
202 /* Parse our part of the command line (aka "runtime options"),
203 * stripping out those options that we handle. */
206 while (argi < argc) {
207 char *arg = argv[argi];
208 if (0 == strcmp(arg, "--noinform")) {
211 } else if (0 == strcmp(arg, "--core")) {
213 lose("more than one core file specified");
217 lose("missing filename for --core argument");
219 core = copied_string(argv[argi]);
222 } else if (0 == strcmp(arg, "--help")) {
223 /* I think this is the (or a) usual convention: upon
224 * seeing "--help" we immediately print our help
225 * string and exit, ignoring everything else. */
228 } else if (0 == strcmp(arg, "--version")) {
229 /* As in "--help" case, I think this is expected. */
232 } else if (0 == strcmp(arg, "--end-runtime-options")) {
233 end_runtime_options = 1;
237 /* This option was unrecognized as a runtime option,
238 * so it must be a toplevel option or a user option,
239 * so we must be past the end of the runtime option
244 /* This is where we strip out those options that we handle. We
245 * also take this opportunity to make sure that we don't find
246 * an out-of-place "--end-runtime-options" option. */
248 char *argi0 = argv[argi];
250 while (argi < argc) {
251 char *arg = argv[argi++];
252 /* If we encounter --end-runtime-options for the first
253 * time after the point where we had to give up on
254 * runtime options, then the point where we had to
255 * give up on runtime options must've been a user
257 if (!end_runtime_options &&
258 0 == strcmp(arg, "--end-runtime-options")) {
259 lose("bad runtime option \"%s\"", argi0);
268 /* If no core file was specified, look for one. */
270 char *sbcl_home = getenv("SBCL_HOME");
272 char *stem = "/sbcl.core";
273 if(!sbcl_home) sbcl_home = SBCL_HOME;
274 lookhere = (char *) calloc(strlen(sbcl_home) +
278 sprintf(lookhere, "%s%s", sbcl_home, stem);
279 core = copied_existing_filename_or_null(lookhere);
282 lose("can't find core file");
285 /* Make sure that SBCL_HOME is set, no matter where the core was
287 if (!getenv("SBCL_HOME")) {
288 char *envstring, *copied_core, *dir;
289 char *stem = "SBCL_HOME=";
290 copied_core = copied_string(core);
291 dir = dirname(copied_core);
292 envstring = (char *) calloc(strlen(stem) +
296 sprintf(envstring, "%s%s", stem, dir);
306 #if defined(SVR4) || defined(__linux__)
310 define_var("nil", NIL, 1);
311 define_var("t", T, 1);
313 set_lossage_handler(monitor_or_something);
317 initial_function = load_core_file(core);
318 if (initial_function == NIL) {
319 lose("couldn't find initial function");
321 SHOW("freeing core");
324 gc_initialize_pointers();
327 arch_install_interrupt_handlers();
328 os_install_interrupt_handlers();
330 /* Convert remaining argv values to something that Lisp can grok. */
331 SHOW("setting POSIX-ARGV symbol value");
332 SetSymbolValue(POSIX_ARGV, alloc_base_string_list(argv),0);
334 /* Install a handler to pick off SIGINT until the Lisp system gets
335 * far enough along to install its own handler. */
338 FSHOW((stderr, "/funcalling initial_function=0x%lx\n", initial_function));
339 create_thread(initial_function);
340 /* in a unithread build, create_thread never returns */
341 #ifdef LISP_FEATURE_SB_THREAD
346 #ifdef LISP_FEATURE_SB_THREAD
348 /* this is being pared down as time goes on; eventually we want to get
349 * to the point that we have no parent loop at all and the parent
350 * thread runs Lisp just like any other */
352 static void /* noreturn */ parent_loop(void)
359 sigemptyset(&sigset);
360 sa.sa_handler=SIG_IGN;
363 sigaction(SIGINT, &sa, 0); /* ^c should go to the lisp thread instead */
364 sigaction(SIG_THREAD_EXIT, &sa, 0);
365 sigaction(SIGCHLD, &sa, 0);
367 while(!all_threads) {
370 while(all_threads && (pid=waitpid(-1,&status,__WALL))) {
373 if(errno == EINTR) continue;
374 fprintf(stderr,"waitpid: %s\n",strerror(errno));
376 else if(WIFEXITED(status) || WIFSIGNALED(status)) {
377 th=find_thread_by_pid(pid);
380 if(!all_threads) break;
383 exit(WEXITSTATUS(status));