/* Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this software; see the file COPYING. If not, write to * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, * Boston, MA 02111-1307 USA * * As a special exception, the Free Software Foundation gives permission * for additional uses of the text contained in its release of GUILE. * * The exception is that, if you link the GUILE library with other files * to produce an executable, this does not by itself cause the * resulting executable to be covered by the GNU General Public License. * Your use of that executable is in no way restricted on account of * linking the GUILE library code into it. * * This exception does not however invalidate any other reasons why * the executable file might be covered by the GNU General Public License. * * This exception applies only to the code released by the * Free Software Foundation under the name GUILE. If you copy * code from other Free Software Foundation releases into a copy of * GUILE, as the General Public License permits, the exception does * not apply to the code that you add in this way. To avoid misleading * anyone as to the status of such modified files, you must delete * this exception notice from them. * * If you write modifications of your own for GUILE, it is your choice * whether to permit this exception to apply to your modifications. * If you do not wish that, delete this exception notice. */ /* Include the headers for just about everything. We call all their initialization functions. */ #include #include "_scm.h" /* Everybody has an init function. */ #include "alist.h" #include "arbiters.h" #include "async.h" #include "backtrace.h" #include "boolean.h" #include "chars.h" #include "continuations.h" #ifdef DEBUG_EXTENSIONS #include "debug.h" #endif #include "dynl.h" #include "dynwind.h" #include "eq.h" #include "error.h" #include "eval.h" #include "feature.h" #include "filesys.h" #include "fluids.h" #include "fports.h" #include "gc.h" #include "gdbint.h" #include "gsubr.h" #include "hash.h" #include "hashtab.h" #ifdef GUILE_ISELECT #include "iselect.h" #endif #include "ioext.h" #include "kw.h" #include "list.h" #include "load.h" #include "mallocs.h" #include "net_db.h" #include "numbers.h" #include "objects.h" #include "objprop.h" #include "options.h" #include "pairs.h" #include "ports.h" #include "posix.h" #ifdef HAVE_REGCOMP #include "regex-posix.h" #endif #include "print.h" #include "procprop.h" #include "procs.h" #include "ramap.h" #include "read.h" #include "readline.h" #include "scmsigs.h" #include "script.h" #include "simpos.h" #include "smob.h" #include "socket.h" #include "srcprop.h" #include "stackchk.h" #include "stacks.h" #include "stime.h" #include "strings.h" #include "strop.h" #include "strorder.h" #include "strports.h" #include "struct.h" #include "symbols.h" #include "tag.h" #include "throw.h" #include "unif.h" #include "variable.h" #include "vectors.h" #include "version.h" #include "vports.h" #include "weaks.h" #include "init.h" #ifdef HAVE_STRING_H #include #endif #ifdef HAVE_UNISTD_H #include #endif /* Setting up the stack. */ static void start_stack SCM_P ((void *base)); static void restart_stack SCM_P ((void * base)); static void start_stack (base) void * base; { SCM root; root = scm_permanent_object (scm_make_root (SCM_UNDEFINED)); scm_set_root (SCM_ROOT_STATE (root)); scm_stack_base = base; scm_exitval = SCM_BOOL_F; /* vestigial */ scm_top_level_lookup_closure_var = SCM_BOOL_F; scm_system_transformer = SCM_BOOL_F; scm_root->fluids = scm_make_initial_fluids (); /* Create an object to hold the root continuation. */ SCM_NEWCELL (scm_rootcont); SCM_SETJMPBUF (scm_rootcont, scm_must_malloc ((long) sizeof (scm_contregs), "continuation")); SCM_SETCAR (scm_rootcont, scm_tc7_contin); SCM_SEQ (scm_rootcont) = 0; /* The root continuation if further initialized by restart_stack. */ /* Create the look-aside stack for variables that are shared between * captured continuations. */ scm_continuation_stack = scm_make_vector (SCM_MAKINUM (512), SCM_UNDEFINED); /* The continuation stack is further initialized by restart_stack. */ /* The remainder of stack initialization is factored out to another * function so that if this stack is ever exitted, it can be * re-entered using restart_stack. */ restart_stack (base); } static void restart_stack (base) void * base; { scm_dynwinds = SCM_EOL; SCM_DYNENV (scm_rootcont) = SCM_EOL; SCM_THROW_VALUE (scm_rootcont) = SCM_EOL; #ifdef DEBUG_EXTENSIONS SCM_DFRAME (scm_rootcont) = scm_last_debug_frame = 0; #endif SCM_BASE (scm_rootcont) = base; scm_continuation_stack_ptr = SCM_MAKINUM (0); } #if 0 static char remsg[] = "remove\n#define ", addmsg[] = "add\n#define "; static void fixconfig SCM_P ((char *s1, char *s2, int s)); static void fixconfig (s1, s2, s) char *s1; char *s2; int s; { fputs (s1, stderr); fputs (s2, stderr); fputs ("\nin ", stderr); fputs (s ? "setjump" : "scmfig", stderr); fputs (".h and recompile scm\n", stderr); exit (1); } static void check_config SCM_P ((void)); static void check_config () { scm_sizet j; j = HEAP_SEG_SIZE; if (HEAP_SEG_SIZE != j) fixconfig ("reduce", "size of HEAP_SEG_SIZE", 0); #ifdef SCM_SINGLES if (sizeof (float) != sizeof (long)) fixconfig (remsg, "SCM_SINGLES", 0); #endif /* def SCM_SINGLES */ #ifdef SCM_BIGDIG if (2 * SCM_BITSPERDIG / SCM_CHAR_BIT > sizeof (long)) fixconfig (remsg, "SCM_BIGDIG", 0); #ifndef SCM_DIGSTOOBIG if (SCM_DIGSPERLONG * sizeof (SCM_BIGDIG) > sizeof (long)) fixconfig (addmsg, "SCM_DIGSTOOBIG", 0); #endif #endif #ifdef SCM_STACK_GROWS_UP if (((SCM_STACKITEM *) & j - stack_start_ptr) < 0) fixconfig (remsg, "SCM_STACK_GROWS_UP", 1); #else if ((stack_start_ptr - (SCM_STACKITEM *) & j) < 0) fixconfig (addmsg, "SCM_STACK_GROWS_UP", 1); #endif } #endif /* initializing standard and current I/O ports */ /* Create standard ports from stdio stdin, stdout, and stderr. */ static void scm_init_standard_ports () { /* From the SCSH manual: It can be useful to turn I/O buffering off in some cases, for example when an I/O stream is to be shared by multiple subprocesses. For this reason, scsh allocates an unbuffered port for file descriptor 0 at start-up time. Because shells frequently share stdin with subprocesses, if the shell does buffered reads, it might ``steal'' input intended for a subprocess. For this reason, all shells, including sh, csh, and scsh, read stdin unbuffered. Applications that can tolerate buffered input on stdin can reset \ex{(current-input-port)} to block buffering for higher performance. */ scm_def_inp = scm_standard_stream_to_port (stdin, (isatty (fileno (stdin)) ? "r0" : "r"), "standard input"); scm_def_outp = scm_standard_stream_to_port (stdout, "w", "standard output"); scm_def_errp = scm_standard_stream_to_port (stderr, "w", "standard error"); scm_cur_inp = scm_def_inp; scm_cur_outp = scm_def_outp; scm_cur_errp = scm_def_errp; scm_cur_loadp = SCM_BOOL_F; } /* Loading the startup Scheme files. */ /* The boot code "ice-9/boot-9" is only loaded by scm_boot_guile when this is false. The unexec code uses this, to keep ice_9 from being loaded into dumped guile executables. */ int scm_ice_9_already_loaded = 0; void scm_load_startup_files () { /* We want a path only containing directories from GUILE_LOAD_PATH, SCM_SITE_DIR and SCM_LIBRARY_DIR when searching for the site init file, so we do this before loading Ice-9. */ SCM init_path = scm_sys_search_load_path (scm_makfrom0str ("init.scm")); /* Load Ice-9. */ if (!scm_ice_9_already_loaded) scm_primitive_load_path (scm_makfrom0str ("ice-9/boot-9.scm")); /* Load the init.scm file. */ if (SCM_NFALSEP (init_path)) scm_primitive_load (init_path); } /* The main init code. */ #ifdef _UNICOS typedef int setjmp_type; #else typedef long setjmp_type; #endif /* All the data needed to invoke the main function. */ struct main_func_closure { /* the function to call */ void (*main_func) SCM_P ((void *closure, int argc, char **argv)); void *closure; /* dummy data to pass it */ int argc; char **argv; /* the argument list it should receive */ }; static void scm_boot_guile_1 SCM_P ((SCM_STACKITEM *base, struct main_func_closure *closure)); static SCM invoke_main_func SCM_P ((void *body_data)); /* Fire up the Guile Scheme interpreter. Call MAIN_FUNC, passing it CLOSURE, ARGC, and ARGV. MAIN_FUNC should do all the work of the program (initializing other packages, reading user input, etc.) before returning. When MAIN_FUNC returns, call exit (0); this function never returns. If you want some other exit value, MAIN_FUNC may call exit itself. scm_boot_guile arranges for program-arguments to return the strings given by ARGC and ARGV. If MAIN_FUNC modifies ARGC/ARGV, should call scm_set_program_arguments with the final list, so Scheme code will know which arguments have been processed. scm_boot_guile establishes a catch-all catch handler which prints an error message and exits the process. This means that Guile exits in a coherent way when system errors occur and the user isn't prepared to handle it. If the user doesn't like this behavior, they can establish their own universal catcher to shadow this one. Why must the caller do all the real work from MAIN_FUNC? The garbage collector assumes that all local variables of type SCM will be above scm_boot_guile's stack frame on the stack. If you try to manipulate SCM values after this function returns, it's the luck of the draw whether the GC will be able to find the objects you allocate. So, scm_boot_guile function exits, rather than returning, to discourage people from making that mistake. */ void scm_boot_guile (argc, argv, main_func, closure) int argc; char ** argv; void (*main_func) (); void *closure; { /* The garbage collector uses the address of this variable as one end of the stack, and the address of one of its own local variables as the other end. */ SCM_STACKITEM dummy; struct main_func_closure c; c.main_func = main_func; c.closure = closure; c.argc = argc; c.argv = argv; scm_boot_guile_1 (&dummy, &c); } /* Record here whether SCM_BOOT_GUILE_1 has already been called. This variable is now here and not inside SCM_BOOT_GUILE_1 so that one can tweak it. This is necessary for unexec to work. (Hey, "1-live" is the name of a local radiostation...) */ int scm_boot_guile_1_live = 0; static void scm_boot_guile_1 (base, closure) SCM_STACKITEM *base; struct main_func_closure *closure; { static int initialized = 0; /* static int live = 0; */ setjmp_type setjmp_val; /* This function is not re-entrant. */ if (scm_boot_guile_1_live) abort (); scm_boot_guile_1_live = 1; scm_ints_disabled = 1; scm_block_gc = 1; if (initialized) { restart_stack (base); } else { scm_ports_prehistory (); scm_smob_prehistory (); scm_tables_prehistory (); scm_init_storage (0); scm_init_root (); #ifdef USE_THREADS scm_init_threads (base); #endif start_stack (base); scm_init_gsubr (); scm_init_feature (); scm_init_alist (); scm_init_arbiters (); scm_init_async (); scm_init_boolean (); scm_init_chars (); scm_init_continuations (); scm_init_dynwind (); scm_init_eq (); scm_init_error (); scm_init_fluids (); scm_init_backtrace (); /* Requires fluids */ scm_init_fports (); scm_init_filesys (); scm_init_gc (); scm_init_gdbint (); scm_init_hash (); scm_init_hashtab (); #ifdef GUILE_ISELECT scm_init_iselect (); #endif scm_init_ioext (); scm_init_kw (); scm_init_list (); scm_init_mallocs (); scm_init_net_db (); scm_init_numbers (); scm_init_objprop (); scm_init_options (); scm_init_pairs (); scm_init_ports (); scm_init_posix (); #ifdef HAVE_REGCOMP scm_init_regex_posix (); #endif scm_init_procs (); scm_init_procprop (); scm_init_scmsigs (); scm_init_socket (); #ifdef DEBUG_EXTENSIONS scm_init_srcprop (); #endif scm_init_stackchk (); scm_init_struct (); /* Requires struct */ scm_init_stacks (); scm_init_strports (); scm_init_symbols (); scm_init_tag (); scm_init_load (); scm_init_objects (); /* Requires struct */ scm_init_print (); /* Requires struct */ scm_init_read (); scm_init_stime (); scm_init_strings (); scm_init_strorder (); scm_init_strop (); scm_init_throw (); scm_init_variable (); scm_init_vectors (); scm_init_version (); scm_init_weaks (); scm_init_vports (); scm_init_eval (); #ifdef DEBUG_EXTENSIONS scm_init_debug (); /* Requires macro smobs */ #endif scm_init_ramap (); scm_init_unif (); scm_init_simpos (); scm_init_load_path (); #if defined (HAVE_RL_GETC_FUNCTION) scm_init_readline (); #endif scm_init_standard_ports (); scm_init_dynamic_linking (); scm_init_script (); initialized = 1; } scm_block_gc = 0; /* permit the gc to run */ /* ints still disabled */ #ifdef STACK_CHECKING scm_stack_checking_enabled_p = SCM_STACK_CHECKING_P; #endif setjmp_val = setjmp (SCM_JMPBUF (scm_rootcont)); if (!setjmp_val) { scm_set_program_arguments (closure->argc, closure->argv, 0); scm_internal_lazy_catch (SCM_BOOL_T, invoke_main_func, closure, scm_handle_by_message, 0); } scm_restore_signals (); /* This tick gives any pending * asyncs a chance to run. This must be done after * the call to scm_restore_signals. */ SCM_ASYNC_TICK; /* If the caller doesn't want this, they should return from main_func themselves. */ exit (0); } static SCM invoke_main_func (body_data) void *body_data; { struct main_func_closure *closure = (struct main_func_closure *) body_data; scm_load_startup_files (); (*closure->main_func) (closure->closure, closure->argc, closure->argv); /* never reached */ return SCM_UNDEFINED; }