1 /* miniperlmain.c 2 * 3 * Copyright (C) 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002, 2003, 4 * 2004, 2005, 2006, 2007, by Larry Wall and others 5 * 6 * You may distribute under the terms of either the GNU General Public 7 * License or the Artistic License, as specified in the README file. 8 * 9 */ 10 11 /* 12 * The Road goes ever on and on 13 * Down from the door where it began. 14 * 15 * [Bilbo on p.35 of _The Lord of the Rings_, I/i: "A Long-Expected Party"] 16 * [Frodo on p.73 of _The Lord of the Rings_, I/iii: "Three Is Company"] 17 */ 18 19 /* This file contains the main() function for the perl interpreter. 20 * Note that miniperlmain.c contains main() for the 'miniperl' binary, 21 * while perlmain.c contains main() for the 'perl' binary. 22 * 23 * Miniperl is like perl except that it does not support dynamic loading, 24 * and in fact is used to build the dynamic modules needed for the 'real' 25 * perl executable. 26 */ 27 28 #ifdef OEMVS 29 #ifdef MYMALLOC 30 /* sbrk is limited to first heap segment so make it big */ 31 #pragma runopts(HEAP(8M,500K,ANYWHERE,KEEP,8K,4K) STACK(,,ANY,) ALL31(ON)) 32 #else 33 #pragma runopts(HEAP(2M,500K,ANYWHERE,KEEP,8K,4K) STACK(,,ANY,) ALL31(ON)) 34 #endif 35 #endif 36 37 38 #include "EXTERN.h" 39 #define PERL_IN_MINIPERLMAIN_C 40 #include "perl.h" 41 42 static void xs_init (pTHX); 43 static PerlInterpreter *my_perl; 44 45 #if defined(PERL_GLOBAL_STRUCT_PRIVATE) 46 /* The static struct perl_vars* may seem counterproductive since the 47 * whole idea PERL_GLOBAL_STRUCT_PRIVATE was to avoid statics, but note 48 * that this static is not in the shared perl library, the globals PL_Vars 49 * and PL_VarsPtr will stay away. */ 50 static struct perl_vars* my_plvarsp; 51 struct perl_vars* Perl_GetVarsPrivate(void) { return my_plvarsp; } 52 #endif 53 54 #ifdef NO_ENV_ARRAY_IN_MAIN 55 extern char **environ; 56 int 57 main(int argc, char **argv) 58 #else 59 int 60 main(int argc, char **argv, char **env) 61 #endif 62 { 63 dVAR; 64 int exitstatus, i; 65 #ifdef PERL_GLOBAL_STRUCT 66 struct perl_vars *plvarsp = init_global_struct(); 67 # ifdef PERL_GLOBAL_STRUCT_PRIVATE 68 my_vars = my_plvarsp = plvarsp; 69 # endif 70 #endif /* PERL_GLOBAL_STRUCT */ 71 #ifndef NO_ENV_ARRAY_IN_MAIN 72 PERL_UNUSED_ARG(env); 73 #endif 74 #ifndef PERL_USE_SAFE_PUTENV 75 PL_use_safe_putenv = FALSE; 76 #endif /* PERL_USE_SAFE_PUTENV */ 77 78 /* if user wants control of gprof profiling off by default */ 79 /* noop unless Configure is given -Accflags=-DPERL_GPROF_CONTROL */ 80 PERL_GPROF_MONCONTROL(0); 81 82 #ifdef NO_ENV_ARRAY_IN_MAIN 83 PERL_SYS_INIT3(&argc,&argv,&environ); 84 #else 85 PERL_SYS_INIT3(&argc,&argv,&env); 86 #endif 87 88 #if defined(USE_ITHREADS) 89 /* XXX Ideally, this should really be happening in perl_alloc() or 90 * perl_construct() to keep libperl.a transparently fork()-safe. 91 * It is currently done here only because Apache/mod_perl have 92 * problems due to lack of a call to cancel pthread_atfork() 93 * handlers when shared objects that contain the handlers may 94 * be dlclose()d. This forces applications that embed perl to 95 * call PTHREAD_ATFORK() explicitly, but if and only if it hasn't 96 * been called at least once before in the current process. 97 * --GSAR 2001-07-20 */ 98 PTHREAD_ATFORK(Perl_atfork_lock, 99 Perl_atfork_unlock, 100 Perl_atfork_unlock); 101 #endif 102 103 if (!PL_do_undump) { 104 my_perl = perl_alloc(); 105 if (!my_perl) 106 exit(1); 107 perl_construct(my_perl); 108 PL_perl_destruct_level = 0; 109 } 110 PL_exit_flags |= PERL_EXIT_DESTRUCT_END; 111 exitstatus = perl_parse(my_perl, xs_init, argc, argv, (char **)NULL); 112 if (!exitstatus) 113 perl_run(my_perl); 114 115 #ifndef PERL_MICRO 116 /* Unregister our signal handler before destroying my_perl */ 117 for (i = 1; PL_sig_name[i]; i++) { 118 if (rsignal_state(PL_sig_num[i]) == (Sighandler_t) PL_csighandlerp) { 119 rsignal(PL_sig_num[i], (Sighandler_t) SIG_DFL); 120 } 121 } 122 #endif 123 124 exitstatus = perl_destruct(my_perl); 125 126 perl_free(my_perl); 127 128 #if defined(USE_ENVIRON_ARRAY) && defined(PERL_TRACK_MEMPOOL) && !defined(NO_ENV_ARRAY_IN_MAIN) 129 /* 130 * The old environment may have been freed by perl_free() 131 * when PERL_TRACK_MEMPOOL is defined, but without having 132 * been restored by perl_destruct() before (this is only 133 * done if destruct_level > 0). 134 * 135 * It is important to have a valid environment for atexit() 136 * routines that are eventually called. 137 */ 138 environ = env; 139 #endif 140 141 PERL_SYS_TERM(); 142 143 #ifdef PERL_GLOBAL_STRUCT 144 free_global_struct(plvarsp); 145 #endif /* PERL_GLOBAL_STRUCT */ 146 147 exit(exitstatus); 148 return exitstatus; 149 } 150 151 /* Register any extra external extensions */ 152 153 /* Do not delete this line--writemain depends on it */ 154 155 static void 156 xs_init(pTHX) 157 { 158 PERL_UNUSED_CONTEXT; 159 dXSUB_SYS; 160 } 161 162 /* 163 * Local variables: 164 * c-indentation-style: bsd 165 * c-basic-offset: 4 166 * indent-tabs-mode: nil 167 * End: 168 * 169 * ex: set ts=8 sts=4 sw=4 et: 170 */ 171