| 1 | /************************************************* |
| 2 | * Exim - an Internet mail transport agent * |
| 3 | *************************************************/ |
| 4 | |
| 5 | /* Copyright (c) 1998 Malcolm Beattie */ |
| 6 | /* Copyright (C) 2017 Exim maintainers */ |
| 7 | |
| 8 | /* Modified by PH to get rid of the "na" usage, March 1999. |
| 9 | Modified further by PH for general tidying for Exim 4. |
| 10 | Threaded Perl support added by Stefan Traby, Nov 2002 |
| 11 | */ |
| 12 | |
| 13 | |
| 14 | /* This Perl add-on can be distributed under the same terms as Exim itself. */ |
| 15 | /* See the file NOTICE for conditions of use and distribution. */ |
| 16 | |
| 17 | #include <assert.h> |
| 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), CCS 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 = 1; |
| 101 | static char *argv[4] = { "exim-perl" }; |
| 102 | SV *sv; |
| 103 | STRLEN len; |
| 104 | |
| 105 | if (opt_perl_taintmode) argv[argc++] = "-T"; |
| 106 | argv[argc++] = "/dev/null"; |
| 107 | argv[argc] = 0; |
| 108 | |
| 109 | assert(sizeof(argv)/sizeof(argv[0]) > argc); |
| 110 | |
| 111 | if (interp_perl) return 0; |
| 112 | interp_perl = perl_alloc(); |
| 113 | perl_construct(interp_perl); |
| 114 | perl_parse(interp_perl, xs_init, argc, argv, 0); |
| 115 | perl_run(interp_perl); |
| 116 | { |
| 117 | dSP; |
| 118 | |
| 119 | /*********************************************************************/ |
| 120 | /* These lines by PH added to make "warn" output go to the Exim log; I |
| 121 | hope this doesn't break anything. */ |
| 122 | |
| 123 | sv = newSVpv( |
| 124 | "$SIG{__WARN__} = sub { my($s) = $_[0];" |
| 125 | "$s =~ s/\\n$//;" |
| 126 | "Exim::log_write($s) };", 0); |
| 127 | PUSHMARK(SP); |
| 128 | perl_eval_sv(sv, G_SCALAR|G_DISCARD|G_KEEPERR); |
| 129 | SvREFCNT_dec(sv); |
| 130 | if (SvTRUE(ERRSV)) return US SvPV(ERRSV, len); |
| 131 | /*********************************************************************/ |
| 132 | |
| 133 | sv = newSVpv(CS startup_code, 0); |
| 134 | PUSHMARK(SP); |
| 135 | perl_eval_sv(sv, G_SCALAR|G_DISCARD|G_KEEPERR); |
| 136 | SvREFCNT_dec(sv); |
| 137 | if (SvTRUE(ERRSV)) return US SvPV(ERRSV, len); |
| 138 | |
| 139 | setlocale(LC_ALL, "C"); /* In case it got changed */ |
| 140 | return NULL; |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | void |
| 145 | cleanup_perl(void) |
| 146 | { |
| 147 | if (!interp_perl) |
| 148 | return; |
| 149 | perl_destruct(interp_perl); |
| 150 | perl_free(interp_perl); |
| 151 | interp_perl = 0; |
| 152 | } |
| 153 | |
| 154 | gstring * |
| 155 | call_perl_cat(gstring * yield, uschar **errstrp, uschar *name, uschar **arg) |
| 156 | { |
| 157 | dSP; |
| 158 | SV *sv; |
| 159 | STRLEN len; |
| 160 | uschar *str; |
| 161 | int items; |
| 162 | |
| 163 | if (!interp_perl) |
| 164 | { |
| 165 | *errstrp = US"the Perl interpreter has not been started"; |
| 166 | return 0; |
| 167 | } |
| 168 | |
| 169 | ENTER; |
| 170 | SAVETMPS; |
| 171 | PUSHMARK(SP); |
| 172 | while (*arg != NULL) XPUSHs(newSVpv(CS (*arg++), 0)); |
| 173 | PUTBACK; |
| 174 | items = perl_call_pv(CS name, G_SCALAR|G_EVAL); |
| 175 | SPAGAIN; |
| 176 | sv = POPs; |
| 177 | PUTBACK; |
| 178 | if (SvTRUE(ERRSV)) |
| 179 | { |
| 180 | *errstrp = US SvPV(ERRSV, len); |
| 181 | return NULL; |
| 182 | } |
| 183 | if (!SvOK(sv)) |
| 184 | { |
| 185 | *errstrp = 0; |
| 186 | return NULL; |
| 187 | } |
| 188 | str = US SvPV(sv, len); |
| 189 | yield = string_catn(yield, str, (int)len); |
| 190 | FREETMPS; |
| 191 | LEAVE; |
| 192 | |
| 193 | setlocale(LC_ALL, "C"); /* In case it got changed */ |
| 194 | return yield; |
| 195 | } |
| 196 | |
| 197 | /* End of perl.c */ |