1 #define INCL_DOSPROCESS
2 #define INCL_DOSSEMAPHORES
3 #define INCL_DOSMODULEMGR
4 #define INCL_DOSMISC
5 #define INCL_DOSEXCEPTIONS
6 #define INCL_DOSERRORS
7 #define INCL_REXXSAA
8 #include <os2.h>
9
10 /*
11 * The Road goes ever on and on
12 * Down from the door where it began.
13 *
14 * [Bilbo on p.35 of _The Lord of the Rings_, I/i: "A Long-Expected Party"]
15 * [Frodo on p.73 of _The Lord of the Rings_, I/iii: "Three Is Company"]
16 */
17
18 #ifdef OEMVS
19 #ifdef MYMALLOC
20 /* sbrk is limited to first heap segement so make it big */
21 #pragma runopts(HEAP(8M,500K,ANYWHERE,KEEP,8K,4K) STACK(,,ANY,) ALL31(ON))
22 #else
23 #pragma runopts(HEAP(2M,500K,ANYWHERE,KEEP,8K,4K) STACK(,,ANY,) ALL31(ON))
24 #endif
25 #endif
26
27
28 #include "EXTERN.h"
29 #include "perl.h"
30
31 static void xs_init (pTHX);
32 static PerlInterpreter *my_perl;
33
34 ULONG PERLEXPORTALL(PCSZ name, LONG rargc, const RXSTRING *rargv, PCSZ queuename, PRXSTRING retstr);
35 ULONG PERLDROPALL(PCSZ name, LONG rargc, const RXSTRING *rargv, PCSZ queuename, PRXSTRING retstr);
36 ULONG PERLDROPALLEXIT(PCSZ name, LONG rargc, const RXSTRING *rargv, PCSZ queuename, PRXSTRING retstr);
37
38 /* Register any extra external extensions */
39
40 /* Do not delete this line--writemain depends on it */
41 EXTERN_C void boot_DynaLoader (pTHX_ CV* cv);
42
43 static void
xs_init(pTHX)44 xs_init(pTHX)
45 {
46 char *file = __FILE__;
47 dXSUB_SYS;
48 newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
49 }
50
51 int perlos2_is_inited;
52
53 static void
init_perlos2(void)54 init_perlos2(void)
55 {
56 /* static char *env[1] = {NULL}; */
57
58 Perl_OS2_init3(0, 0, 0);
59 }
60
61 static int
init_perl(int doparse)62 init_perl(int doparse)
63 {
64 char *argv[3] = {"perl_in_REXX", "-e", ""};
65
66 if (!perlos2_is_inited) {
67 perlos2_is_inited = 1;
68 init_perlos2();
69 }
70 if (my_perl)
71 return 1;
72 if (!PL_do_undump) {
73 my_perl = perl_alloc();
74 if (!my_perl)
75 return 0;
76 perl_construct(my_perl);
77 PL_perl_destruct_level = 1;
78 }
79 if (!doparse)
80 return 1;
81 return !perl_parse(my_perl, xs_init, 3, argv, (char **)NULL);
82 }
83
84 static char last_error[4096];
85
86 static int
seterr(char * format,...)87 seterr(char *format, ...)
88 {
89 va_list va;
90 char *s = last_error;
91
92 va_start(va, format);
93 if (s[0]) {
94 s += strlen(s);
95 if (s[-1] != '\n') {
96 snprintf(s, sizeof(last_error) - (s - last_error), "\n");
97 s += strlen(s);
98 }
99 }
100 vsnprintf(s, sizeof(last_error) - (s - last_error), format, va);
101 return 1;
102 }
103
104 /* The REXX-callable entrypoints ... */
105
PERL(PCSZ name,LONG rargc,const RXSTRING * rargv,PCSZ queuename,PRXSTRING retstr)106 ULONG PERL (PCSZ name, LONG rargc, const RXSTRING *rargv,
107 PCSZ queuename, PRXSTRING retstr)
108 {
109 int exitstatus;
110 char buf[256];
111 char *argv[3] = {"perl_from_REXX", "-e", buf};
112 ULONG ret;
113
114 if (rargc != 1)
115 return seterr("one argument expected, got %ld", rargc);
116 if (rargv[0].strlength >= sizeof(buf))
117 return seterr("length of the argument %ld exceeds the maximum %ld",
118 rargv[0].strlength, (long)sizeof(buf) - 1);
119
120 if (!init_perl(0))
121 return 1;
122
123 memcpy(buf, rargv[0].strptr, rargv[0].strlength);
124 buf[rargv[0].strlength] = 0;
125
126 if (!perl_parse(my_perl, xs_init, 3, argv, (char **)NULL))
127 perl_run(my_perl);
128
129 exitstatus = perl_destruct(my_perl);
130 perl_free(my_perl);
131 my_perl = 0;
132
133 if (exitstatus)
134 ret = 1;
135 else {
136 ret = 0;
137 sprintf(retstr->strptr, "%s", "ok");
138 retstr->strlength = strlen (retstr->strptr);
139 }
140 PERL_SYS_TERM1(0);
141 return ret;
142 }
143
PERLEXIT(PCSZ name,LONG rargc,const RXSTRING * rargv,PCSZ queuename,PRXSTRING retstr)144 ULONG PERLEXIT (PCSZ name, LONG rargc, const RXSTRING *rargv,
145 PCSZ queuename, PRXSTRING retstr)
146 {
147 if (rargc != 0)
148 return seterr("no arguments expected, got %ld", rargc);
149 PERL_SYS_TERM1(0);
150 return 0;
151 }
152
PERLTERM(PCSZ name,LONG rargc,const RXSTRING * rargv,PCSZ queuename,PRXSTRING retstr)153 ULONG PERLTERM (PCSZ name, LONG rargc, const RXSTRING *rargv,
154 PCSZ queuename, PRXSTRING retstr)
155 {
156 if (rargc != 0)
157 return seterr("no arguments expected, got %ld", rargc);
158 if (!my_perl)
159 return seterr("no perl interpreter present");
160 perl_destruct(my_perl);
161 perl_free(my_perl);
162 my_perl = 0;
163
164 sprintf(retstr->strptr, "%s", "ok");
165 retstr->strlength = strlen (retstr->strptr);
166 return 0;
167 }
168
169
PERLINIT(PCSZ name,LONG rargc,const RXSTRING * rargv,PCSZ queuename,PRXSTRING retstr)170 ULONG PERLINIT (PCSZ name, LONG rargc, const RXSTRING *rargv,
171 PCSZ queuename, PRXSTRING retstr)
172 {
173 if (rargc != 0)
174 return seterr("no argument expected, got %ld", rargc);
175 if (!init_perl(1))
176 return 1;
177
178 sprintf(retstr->strptr, "%s", "ok");
179 retstr->strlength = strlen (retstr->strptr);
180 return 0;
181 }
182
183 ULONG
PERLLASTERROR(PCSZ name,LONG rargc,const RXSTRING * rargv,PCSZ queuename,PRXSTRING retstr)184 PERLLASTERROR (PCSZ name, LONG rargc, const RXSTRING *rargv, PCSZ queuename, PRXSTRING retstr)
185 {
186 int len = strlen(last_error);
187
188 if (len <= 256 /* Default buffer is 256-char long */
189 || !DosAllocMem((PPVOID)&retstr->strptr, len,
190 PAG_READ|PAG_WRITE|PAG_COMMIT)) {
191 memcpy(retstr->strptr, last_error, len);
192 retstr->strlength = len;
193 } else {
194 strcpy(retstr->strptr, "[Not enough memory to copy the errortext]");
195 retstr->strlength = strlen(retstr->strptr);
196 }
197 return 0;
198 }
199
200 ULONG
PERLEVAL(PCSZ name,LONG rargc,const RXSTRING * rargv,PCSZ queuename,PRXSTRING retstr)201 PERLEVAL (PCSZ name, LONG rargc, const RXSTRING *rargv, PCSZ queuename, PRXSTRING retstr)
202 {
203 SV *res, *in;
204 STRLEN len, n_a;
205 char *str;
206
207 last_error[0] = 0;
208 if (rargc != 1)
209 return seterr("one argument expected, got %ld", rargc);
210
211 if (!init_perl(1))
212 return seterr("error initializing perl");
213
214 {
215 dSP;
216 int ret;
217
218 ENTER;
219 SAVETMPS;
220
221 PUSHMARK(SP);
222 in = sv_2mortal(newSVpvn(rargv[0].strptr, rargv[0].strlength));
223 eval_sv(in, G_SCALAR);
224 SPAGAIN;
225 res = POPs;
226 PUTBACK;
227
228 ret = 0;
229 if (SvTRUE(ERRSV))
230 ret = seterr(SvPV(ERRSV, n_a));
231 if (!SvOK(res))
232 ret = seterr("undefined value returned by Perl-in-REXX");
233 str = SvPV(res, len);
234 if (len <= 256 /* Default buffer is 256-char long */
235 || !DosAllocMem((PPVOID)&retstr->strptr, len,
236 PAG_READ|PAG_WRITE|PAG_COMMIT)) {
237 memcpy(retstr->strptr, str, len);
238 retstr->strlength = len;
239 } else
240 ret = seterr("Not enough memory for the return string of Perl-in-REXX");
241
242 FREETMPS;
243 LEAVE;
244
245 return ret;
246 }
247 }
248
249 ULONG
PERLEVALSUBCOMMAND(const RXSTRING * command,PUSHORT flags,PRXSTRING retstr)250 PERLEVALSUBCOMMAND(
251 const RXSTRING *command, /* command to issue */
252 PUSHORT flags, /* error/failure flags */
253 PRXSTRING retstr ) /* return code */
254 {
255 ULONG rc = PERLEVAL(NULL, 1, command, NULL, retstr);
256
257 if (rc)
258 *flags = RXSUBCOM_ERROR; /* raise error condition */
259
260 return 0; /* finished */
261 }
262
263 #define ArrLength(a) (sizeof(a)/sizeof(*(a)))
264
265 static const struct {
266 char *name;
267 RexxFunctionHandler *f;
268 } funcs[] = {
269 {"PERL", (RexxFunctionHandler *)&PERL},
270 {"PERLTERM", (RexxFunctionHandler *)&PERLTERM},
271 {"PERLINIT", (RexxFunctionHandler *)&PERLINIT},
272 {"PERLEXIT", (RexxFunctionHandler *)&PERLEXIT},
273 {"PERLEVAL", (RexxFunctionHandler *)&PERLEVAL},
274 {"PERLLASTERROR", (RexxFunctionHandler *)&PERLLASTERROR},
275 {"PERLDROPALL", (RexxFunctionHandler *)&PERLDROPALL},
276 {"PERLDROPALLEXIT", (RexxFunctionHandler *)&PERLDROPALLEXIT},
277 /* Should be the last entry */
278 {"PERLEXPORTALL", (RexxFunctionHandler *)&PERLEXPORTALL}
279 };
280
281 ULONG
PERLEXPORTALL(PCSZ name,LONG rargc,const RXSTRING * rargv,PCSZ queuename,PRXSTRING retstr)282 PERLEXPORTALL(PCSZ name, LONG rargc, const RXSTRING *rargv, PCSZ queuename, PRXSTRING retstr)
283 {
284 int i = -1;
285
286 while (++i < ArrLength(funcs) - 1)
287 RexxRegisterFunctionExe(funcs[i].name, funcs[i].f);
288 RexxRegisterSubcomExe("EVALPERL", (PFN)&PERLEVALSUBCOMMAND, NULL);
289 retstr->strlength = 0;
290 return 0;
291 }
292
293 ULONG
PERLDROPALL(PCSZ name,LONG rargc,const RXSTRING * rargv,PCSZ queuename,PRXSTRING retstr)294 PERLDROPALL(PCSZ name, LONG rargc, const RXSTRING *rargv, PCSZ queuename, PRXSTRING retstr)
295 {
296 int i = -1;
297
298 while (++i < ArrLength(funcs))
299 RexxDeregisterFunction(funcs[i].name);
300 RexxDeregisterSubcom("EVALPERL", NULL /* Not a DLL version */);
301 retstr->strlength = 0;
302 return 0;
303 }
304
305 ULONG
PERLDROPALLEXIT(PCSZ name,LONG rargc,const RXSTRING * rargv,PCSZ queuename,PRXSTRING retstr)306 PERLDROPALLEXIT(PCSZ name, LONG rargc, const RXSTRING *rargv, PCSZ queuename, PRXSTRING retstr)
307 {
308 int i = -1;
309
310 while (++i < ArrLength(funcs))
311 RexxDeregisterFunction(funcs[i].name);
312 RexxDeregisterSubcom("EVALPERL", NULL /* Not a DLL version */);
313 PERL_SYS_TERM1(0);
314 retstr->strlength = 0;
315 return 0;
316 }
317