summaryrefslogtreecommitdiff
path: root/miniperlmain.c
blob: f22dcbba8d8f202238e026fafb7ae9bb53243b35 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
/* -*- buffer-read-only: t -*-
   !!!!!!!   DO NOT EDIT THIS FILE   !!!!!!!
   This file is built by regen/miniperlmain.pl and ExtUtils::Miniperl.
   Any changes made here will be lost!
 */

/*    miniperlmain.c
 *
 *    Copyright (C) 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002, 2003,
 *    2004, 2005, 2006, 2007, by Larry Wall and others
 *
 *    You may distribute under the terms of either the GNU General Public
 *    License or the Artistic License, as specified in the README file.
 *
 */

/*
 *      The Road goes ever on and on
 *          Down from the door where it began.
 *
 *     [Bilbo on p.35 of _The Lord of the Rings_, I/i: "A Long-Expected Party"]
 *     [Frodo on p.73 of _The Lord of the Rings_, I/iii: "Three Is Company"]
 */

/* This file contains the main() function for the perl interpreter.
 * Note that miniperlmain.c contains main() for the 'miniperl' binary,
 * while perlmain.c contains main() for the 'perl' binary.
 *
 * Miniperl is like perl except that it does not support dynamic loading,
 * and in fact is used to build the dynamic modules needed for the 'real'
 * perl executable.
 */

#ifdef OEMVS
#ifdef MYMALLOC
/* sbrk is limited to first heap segment so make it big */
#pragma runopts(HEAP(8M,500K,ANYWHERE,KEEP,8K,4K) STACK(,,ANY,) ALL31(ON))
#else
#pragma runopts(HEAP(2M,500K,ANYWHERE,KEEP,8K,4K) STACK(,,ANY,) ALL31(ON))
#endif
#endif

#define PERL_IN_MINIPERLMAIN_C
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

static void xs_init (pTHX);
static PerlInterpreter *my_perl;

#if defined(PERL_GLOBAL_STRUCT_PRIVATE)
/* The static struct perl_vars* may seem counterproductive since the
 * whole idea PERL_GLOBAL_STRUCT_PRIVATE was to avoid statics, but note
 * that this static is not in the shared perl library, the globals PL_Vars
 * and PL_VarsPtr will stay away. */
static struct perl_vars* my_plvarsp;
struct perl_vars* Perl_GetVarsPrivate(void) { return my_plvarsp; }
#endif

#ifdef NO_ENV_ARRAY_IN_MAIN
extern char **environ;
int
main(int argc, char **argv)
#else
int
main(int argc, char **argv, char **env)
#endif
{
    int exitstatus, i;
#ifdef PERL_GLOBAL_STRUCT
    struct perl_vars *my_vars = init_global_struct();
#  ifdef PERL_GLOBAL_STRUCT_PRIVATE
    int veto;

    my_plvarsp = my_vars;
#  endif
#endif /* PERL_GLOBAL_STRUCT */
#ifndef NO_ENV_ARRAY_IN_MAIN
    PERL_UNUSED_ARG(env);
#endif
#ifndef PERL_USE_SAFE_PUTENV
    PL_use_safe_putenv = FALSE;
#endif /* PERL_USE_SAFE_PUTENV */

    /* if user wants control of gprof profiling off by default */
    /* noop unless Configure is given -Accflags=-DPERL_GPROF_CONTROL */
    PERL_GPROF_MONCONTROL(0);

#ifdef NO_ENV_ARRAY_IN_MAIN
    PERL_SYS_INIT3(&argc,&argv,&environ);
#else
    PERL_SYS_INIT3(&argc,&argv,&env);
#endif

#if defined(USE_ITHREADS)
    /* XXX Ideally, this should really be happening in perl_alloc() or
     * perl_construct() to keep libperl.a transparently fork()-safe.
     * It is currently done here only because Apache/mod_perl have
     * problems due to lack of a call to cancel pthread_atfork()
     * handlers when shared objects that contain the handlers may
     * be dlclose()d.  This forces applications that embed perl to
     * call PTHREAD_ATFORK() explicitly, but if and only if it hasn't
     * been called at least once before in the current process.
     * --GSAR 2001-07-20 */
    PTHREAD_ATFORK(Perl_atfork_lock,
                   Perl_atfork_unlock,
                   Perl_atfork_unlock);
#endif

    if (!PL_do_undump) {
	my_perl = perl_alloc();
	if (!my_perl)
	    exit(1);
	perl_construct(my_perl);
	PL_perl_destruct_level = 0;
    }
    PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
    exitstatus = perl_parse(my_perl, xs_init, argc, argv, (char **)NULL);
    if (!exitstatus)
        perl_run(my_perl);

#ifndef PERL_MICRO
    /* Unregister our signal handler before destroying my_perl */
    for (i = 1; PL_sig_name[i]; i++) {
	if (rsignal_state(PL_sig_num[i]) == (Sighandler_t) PL_csighandlerp) {
	    rsignal(PL_sig_num[i], (Sighandler_t) SIG_DFL);
	}
    }
#endif

    exitstatus = perl_destruct(my_perl);

    perl_free(my_perl);

#if defined(USE_ENVIRON_ARRAY) && defined(PERL_TRACK_MEMPOOL) && !defined(NO_ENV_ARRAY_IN_MAIN)
    /*
     * The old environment may have been freed by perl_free()
     * when PERL_TRACK_MEMPOOL is defined, but without having
     * been restored by perl_destruct() before (this is only
     * done if destruct_level > 0).
     *
     * It is important to have a valid environment for atexit()
     * routines that are eventually called.
     */
    environ = env;
#endif

    PERL_SYS_TERM();

#ifdef PERL_GLOBAL_STRUCT
#  ifdef PERL_GLOBAL_STRUCT_PRIVATE
    veto = my_plvarsp->Gveto_cleanup;
#  endif
    free_global_struct(my_vars);
#  ifdef PERL_GLOBAL_STRUCT_PRIVATE
    if (!veto)
        my_plvarsp = NULL;
    /* Remember, functions registered with atexit() can run after this point,
       and may access "global" variables, and hence end up calling
       Perl_GetVarsPrivate()  */
#endif
#endif /* PERL_GLOBAL_STRUCT */

    exit(exitstatus);
    return exitstatus;
}

/* Register any extra external extensions */


static void
xs_init(pTHX)
{
    dXSUB_SYS;
    PERL_UNUSED_CONTEXT;
}

/* ex: set ro: */