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a444213a | 1 | /* $Cambridge: exim/src/src/perl.c,v 1.2 2004/12/20 11:46:21 ph10 Exp $ */ |
059ec3d9 PH |
2 | |
3 | /************************************************* | |
4 | * Exim - an Internet mail transport agent * | |
5 | *************************************************/ | |
6 | ||
7 | /* Copyright (c) 1998 Malcolm Beattie */ | |
8 | ||
9 | /* Modified by PH to get rid of the "na" usage, March 1999. | |
10 | Modified further by PH for general tidying for Exim 4. | |
11 | Threaded Perl support added by Stefan Traby, Nov 2002 | |
12 | */ | |
13 | ||
14 | ||
15 | /* This Perl add-on can be distributed under the same terms as Exim itself. */ | |
16 | /* See the file NOTICE for conditions of use and distribution. */ | |
17 | ||
18 | #include "exim.h" | |
19 | ||
20 | #define EXIM_TRUE TRUE | |
21 | #undef TRUE | |
22 | ||
23 | #define EXIM_FALSE FALSE | |
24 | #undef FALSE | |
25 | ||
26 | #define EXIM_DEBUG DEBUG | |
27 | #undef DEBUG | |
28 | ||
29 | #include <EXTERN.h> | |
30 | #include <perl.h> | |
31 | #include <XSUB.h> | |
32 | ||
33 | #ifndef ERRSV | |
34 | #define ERRSV (GvSV(errgv)) | |
35 | #endif | |
36 | ||
37 | /* Some people like very old perl versions, so avoid any build side-effects. */ | |
38 | ||
39 | #ifndef pTHX | |
40 | # define pTHX | |
41 | # define pTHX_ | |
42 | #endif | |
43 | #ifndef EXTERN_C | |
44 | # define EXTERN_C extern | |
45 | #endif | |
46 | ||
47 | EXTERN_C void boot_DynaLoader(pTHX_ CV *cv); | |
48 | ||
49 | ||
50 | static PerlInterpreter *interp_perl = 0; | |
51 | ||
52 | XS(xs_expand_string) | |
53 | { | |
54 | dXSARGS; | |
55 | uschar *str; | |
56 | STRLEN len; | |
57 | ||
58 | if (items != 1) | |
59 | croak("Usage: Exim::expand_string(string)"); | |
60 | ||
61 | str = expand_string(US SvPV(ST(0), len)); | |
62 | ST(0) = sv_newmortal(); | |
63 | if (str != NULL) | |
64 | sv_setpv(ST(0), (const char *) str); | |
65 | else if (!expand_string_forcedfail) | |
66 | croak("syntax error in Exim::expand_string argument: %s", | |
67 | expand_string_message); | |
68 | } | |
69 | ||
70 | XS(xs_debug_write) | |
71 | { | |
72 | dXSARGS; | |
73 | STRLEN len; | |
74 | if (items != 1) | |
75 | croak("Usage: Exim::debug_write(string)"); | |
76 | debug_printf("%s", US SvPV(ST(0), len)); | |
77 | } | |
78 | ||
79 | XS(xs_log_write) | |
80 | { | |
81 | dXSARGS; | |
82 | STRLEN len; | |
83 | if (items != 1) | |
84 | croak("Usage: Exim::log_write(string)"); | |
85 | log_write(0, LOG_MAIN, "%s", US SvPV(ST(0), len)); | |
86 | } | |
87 | ||
88 | static void xs_init(pTHX) | |
89 | { | |
90 | char *file = __FILE__; | |
91 | newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file); | |
92 | newXS("Exim::expand_string", xs_expand_string, file); | |
93 | newXS("Exim::debug_write", xs_debug_write, file); | |
94 | newXS("Exim::log_write", xs_log_write, file); | |
95 | } | |
96 | ||
97 | uschar * | |
98 | init_perl(uschar *startup_code) | |
99 | { | |
100 | static int argc = 2; | |
101 | static char *argv[3] = { "exim-perl", "/dev/null", 0 }; | |
102 | SV *sv; | |
103 | STRLEN len; | |
104 | ||
105 | if (interp_perl) return 0; | |
106 | interp_perl = perl_alloc(); | |
107 | perl_construct(interp_perl); | |
108 | perl_parse(interp_perl, xs_init, argc, argv, 0); | |
109 | perl_run(interp_perl); | |
110 | { | |
111 | dSP; | |
112 | sv = newSVpv(CS startup_code, 0); | |
113 | PUSHMARK(SP); | |
114 | perl_eval_sv(sv, G_SCALAR|G_DISCARD|G_KEEPERR); | |
115 | SvREFCNT_dec(sv); | |
116 | if (SvTRUE(ERRSV)) return US SvPV(ERRSV, len); | |
117 | return NULL; | |
118 | } | |
119 | } | |
120 | ||
121 | void | |
122 | cleanup_perl(void) | |
123 | { | |
124 | if (!interp_perl) | |
125 | return; | |
126 | perl_destruct(interp_perl); | |
127 | perl_free(interp_perl); | |
128 | interp_perl = 0; | |
129 | } | |
130 | ||
131 | uschar * | |
132 | call_perl_cat(uschar *yield, int *sizep, int *ptrp, uschar **errstrp, | |
133 | uschar *name, uschar **arg) | |
134 | { | |
135 | dSP; | |
136 | SV *sv; | |
137 | STRLEN len; | |
138 | uschar *str; | |
139 | int items; | |
140 | ||
141 | if (!interp_perl) | |
142 | { | |
143 | *errstrp = US"the Perl interpreter has not been started"; | |
144 | return 0; | |
145 | } | |
146 | ||
147 | ENTER; | |
148 | SAVETMPS; | |
149 | PUSHMARK(SP); | |
150 | while (*arg != NULL) XPUSHs(newSVpv(CS (*arg++), 0)); | |
151 | PUTBACK; | |
152 | items = perl_call_pv(CS name, G_SCALAR|G_EVAL); | |
153 | SPAGAIN; | |
154 | sv = POPs; | |
155 | PUTBACK; | |
156 | if (SvTRUE(ERRSV)) | |
157 | { | |
158 | *errstrp = US SvPV(ERRSV, len); | |
159 | return NULL; | |
160 | } | |
161 | if (!SvOK(sv)) | |
162 | { | |
163 | *errstrp = 0; | |
164 | return NULL; | |
165 | } | |
166 | str = US SvPV(sv, len); | |
167 | yield = string_cat(yield, sizep, ptrp, str, (int)len); | |
168 | FREETMPS; | |
169 | LEAVE; | |
a444213a PH |
170 | |
171 | setlocale(LC_ALL, "C"); /* In case it got changed */ | |
059ec3d9 PH |
172 | return yield; |
173 | } | |
174 | ||
175 | /* End of perl.c */ |