source: perlconfig.c @ 6922edd

barnowl_perlaimdebianrelease-1.4release-1.5release-1.6release-1.7release-1.8release-1.9
Last change on this file since 6922edd was 6922edd, checked in by Nelson Elhage <nelhage@mit.edu>, 14 years ago
Adding the ability to install real commands from perl.
  • Property mode set to 100644
File size: 8.8 KB
Line 
1#include <stdio.h>
2#include <stdlib.h>
3#include <string.h>
4#include <sys/types.h>
5#include <sys/stat.h>
6#include <errno.h>
7#define OWL_PERL
8#include "owl.h"
9
10static const char fileIdent[] = "$Id$";
11
12extern char *owl_perlwrap_codebuff;
13
14extern XS(boot_owl);
15extern XS(boot_DynaLoader);
16// extern XS(boot_DBI);
17
18static void owl_perl_xs_init(pTHX)
19{
20  char *file = __FILE__;
21  dXSUB_SYS;
22  {
23    newXS("owl::bootstrap", boot_owl, file);
24    newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
25  }
26}
27
28SV *owl_perlconfig_message2hashref(owl_message *m)  /*noproto*/
29{
30  HV *h;
31  SV *hr;
32  char *ptr, *blessas;
33  int i, j;
34
35  if (!m) return &PL_sv_undef;
36  h = newHV();
37
38#define MSG2H(h,field) hv_store(h, #field, strlen(#field), \
39                              newSVpv(owl_message_get_##field(m),0), 0)
40
41  if (owl_message_is_type_zephyr(m)
42      && owl_message_is_direction_in(m)) {
43    /* Handle zephyr-specific fields... */
44    AV *av_zfields;
45
46    av_zfields = newAV();
47    j=owl_zephyr_get_num_fields(owl_message_get_notice(m));
48    for (i=0; i<j; i++) {
49      ptr=owl_zephyr_get_field(owl_message_get_notice(m), i+1);
50      av_push(av_zfields, newSVpvn(ptr, strlen(ptr)));
51      owl_free(ptr);
52    }
53    hv_store(h, "fields", strlen("fields"), newRV_noinc((SV*)av_zfields), 0);
54
55    hv_store(h, "auth", strlen("auth"), 
56             newSVpv(owl_zephyr_get_authstr(owl_message_get_notice(m)),0),0);
57  }
58
59  MSG2H(h, type);
60  MSG2H(h, direction);
61  MSG2H(h, class);
62  MSG2H(h, instance);
63  MSG2H(h, sender);
64  MSG2H(h, realm);
65  MSG2H(h, recipient);
66  MSG2H(h, opcode);
67  MSG2H(h, hostname);
68  MSG2H(h, body);
69  MSG2H(h, login);
70  MSG2H(h, zsig);
71  MSG2H(h, zwriteline);
72  if (owl_message_get_header(m)) {
73    MSG2H(h, header); 
74  }
75  hv_store(h, "time", strlen("time"), newSVpv(owl_message_get_timestr(m),0),0);
76  hv_store(h, "id", strlen("id"), newSViv(owl_message_get_id(m)),0);
77  hv_store(h, "deleted", strlen("deleted"), newSViv(owl_message_is_delete(m)),0);
78  hv_store(h, "private", strlen("private"), newSViv(owl_message_is_private(m)),0);
79
80  if (owl_message_is_type_zephyr(m))       blessas = "owl::Message::Zephyr";
81  else if (owl_message_is_type_aim(m))     blessas = "owl::Message::AIM";
82  else if (owl_message_is_type_admin(m))   blessas = "owl::Message::Admin";
83  else if (owl_message_is_type_generic(m)) blessas = "owl::Message::Generic";
84  else                                     blessas = "owl::Message";
85
86  hr = sv_2mortal(newRV_noinc((SV*)h));
87  return sv_bless(hr, gv_stashpv(blessas,0));
88}
89
90
91SV *owl_perlconfig_curmessage2hashref(void) /*noproto*/
92{
93  int curmsg;
94  owl_view *v;
95  v=owl_global_get_current_view(&g);
96  if (owl_view_get_size(v) < 1) {
97    return &PL_sv_undef;
98  }
99  curmsg=owl_global_get_curmsg(&g);
100  return owl_perlconfig_message2hashref(owl_view_get_element(v, curmsg));
101}
102
103
104/* Calls in a scalar context, passing it a hash reference.
105   If return value is non-null, caller must free. */
106char *owl_perlconfig_call_with_message(char *subname, owl_message *m)
107{
108  dSP ;
109  int count, len;
110  SV *msgref, *srv;
111  char *out, *preout;
112 
113  ENTER ;
114  SAVETMPS;
115 
116  PUSHMARK(SP) ;
117  msgref = owl_perlconfig_message2hashref(m);
118  XPUSHs(msgref);
119  PUTBACK ;
120 
121  count = call_pv(subname, G_SCALAR|G_EVAL|G_KEEPERR);
122 
123  SPAGAIN ;
124
125  if (SvTRUE(ERRSV)) {
126    STRLEN n_a;
127    owl_function_error("Perl Error: '%s'", SvPV(ERRSV, n_a));
128    /* and clear the error */
129    sv_setsv (ERRSV, &PL_sv_undef);
130  }
131
132  if (count != 1) {
133    fprintf(stderr, "bad perl!  no biscuit!  returned wrong count!\n");
134    abort();
135  }
136
137  srv = POPs;
138
139  if (srv) {
140    preout=SvPV(srv, len);
141    out = owl_malloc(strlen(preout)+1);
142    strncpy(out, preout, len);
143    out[len] = '\0';
144  } else {
145    out = NULL;
146  }
147 
148  PUTBACK ;
149  FREETMPS ;
150  LEAVE ;
151
152  return out;
153}
154
155char *owl_perlconfig_readconfig(char *file)
156{
157  int ret, fd;
158  PerlInterpreter *p;
159  char filename[1024];
160  char *embedding[5];
161  char *err;
162  struct stat statbuff;
163
164  if (file==NULL) {
165    sprintf(filename, "%s/%s", getenv("HOME"), ".owlconf");
166  } else {
167    strcpy(filename, file);
168  }
169  embedding[0]="";
170  embedding[1]=filename;
171  embedding[2]=0;
172
173  /* create and initialize interpreter */
174  p=perl_alloc();
175  owl_global_set_perlinterp(&g, (void*)p);
176  perl_construct(p);
177
178  owl_global_set_no_have_config(&g);
179
180  /* Before we let perl have at it, we'll do our own checks on the the
181   *  file to see if it's present, readnable etc.
182   */
183
184  /* Not present, start without it */
185  ret=stat(filename, &statbuff);
186  if (ret) {
187    return(NULL);
188  }
189
190  /* present, but stat thinks it's unreadable */
191  if (! (statbuff.st_mode & S_IREAD)) {
192    return(owl_sprintf("%s present but not readable", filename));
193  }
194
195  /* can we open it? */
196  fd=open(filename, O_RDONLY);
197  if (fd==-1) {
198    return(owl_sprintf("could not open %s for reading", filename));
199  }
200  close(fd);
201
202  ret=perl_parse(p, owl_perl_xs_init, 2, embedding, NULL);
203  if (ret || SvTRUE(ERRSV)) {
204    STRLEN n_a;
205    err=owl_strdup(SvPV(ERRSV, n_a));
206    sv_setsv(ERRSV, &PL_sv_undef);     /* and clear the error */
207    return(err);
208  }
209
210  ret=perl_run(p);
211  if (ret || SvTRUE(ERRSV)) {
212    STRLEN n_a;
213    err=owl_strdup(SvPV(ERRSV, n_a));
214    sv_setsv(ERRSV, &PL_sv_undef);     /* and clear the error */
215    return(err);
216  }
217
218  owl_global_set_have_config(&g);
219
220  /* create legacy variables */
221  perl_get_sv("owl::id", TRUE);
222  perl_get_sv("owl::class", TRUE);
223  perl_get_sv("owl::instance", TRUE);
224  perl_get_sv("owl::recipient", TRUE);
225  perl_get_sv("owl::sender", TRUE);
226  perl_get_sv("owl::realm", TRUE);
227  perl_get_sv("owl::opcode", TRUE);
228  perl_get_sv("owl::zsig", TRUE);
229  perl_get_sv("owl::msg", TRUE);
230  perl_get_sv("owl::time", TRUE);
231  perl_get_sv("owl::host", TRUE);
232  perl_get_av("owl::fields", TRUE);
233 
234  perl_eval_pv(owl_perlwrap_codebuff, FALSE);
235
236  if (SvTRUE(ERRSV)) {
237    STRLEN n_a;
238    err=owl_strdup(SvPV(ERRSV, n_a));
239    sv_setsv (ERRSV, &PL_sv_undef);     /* and clear the error */
240    return(err);
241  }
242
243  /* check if we have the formatting function */
244  if (owl_perlconfig_is_function("owl::format_msg")) {
245    owl_global_set_config_format(&g, 1);
246  }
247
248  return(NULL);
249}
250
251/* returns whether or not a function exists */
252int owl_perlconfig_is_function(char *fn) {
253  if (perl_get_cv(fn, FALSE)) return(1);
254  else return(0);
255}
256
257/* returns 0 on success */
258int owl_perlconfig_get_hashkeys(char *hashname, owl_list *l)
259{
260  HV *hv;
261  HE *he;
262  char *key;
263  I32 i;
264
265  if (owl_list_create(l)) return(-1);
266  hv = get_hv(hashname, FALSE);
267  if (!hv) return(-1);
268  i = hv_iterinit(hv);
269  while ((he = hv_iternext(hv))) {
270    key = hv_iterkey(he, &i);
271    if (key) {
272      owl_list_append_element(l, owl_strdup(key));
273    }
274  }
275  return(0);
276}
277
278/* caller is responsible for freeing returned string */
279char *owl_perlconfig_execute(char *line)
280{
281  STRLEN len;
282  SV *response;
283  char *out, *preout;
284
285  if (!owl_global_have_config(&g)) return NULL;
286
287  /* execute the subroutine */
288  response = perl_eval_pv(line, FALSE);
289
290  if (SvTRUE(ERRSV)) {
291    STRLEN n_a;
292    owl_function_error("Perl Error: '%s'", SvPV(ERRSV, n_a));
293    sv_setsv (ERRSV, &PL_sv_undef);     /* and clear the error */
294  }
295
296  preout=SvPV(response, len);
297  /* leave enough space in case we have to add a newline */
298  out = owl_malloc(strlen(preout)+2);
299  strncpy(out, preout, len);
300  out[len] = '\0';
301  if (!strlen(out) || out[strlen(out)-1]!='\n') {
302    strcat(out, "\n");
303  }
304
305  return(out);
306}
307
308char *owl_perlconfig_getmsg(owl_message *m, int mode, char *subname)
309{ 
310  /* if mode==1 we are doing message formatting.  The returned
311   * formatted message needs to be freed by the caller.
312   *
313   * if mode==0 we are just doing the message-has-been-received
314   * thing.
315   */
316  if (!owl_global_have_config(&g)) return(NULL);
317 
318  /* run the procedure corresponding to the mode */
319  if (mode==1) {
320    char *ret = NULL;
321    ret = owl_perlconfig_call_with_message(subname?subname
322                                           :"owl::_format_msg_legacy_wrap", m);
323    if (!ret) {
324      ret = owl_sprintf("@b([Perl Message Formatting Failed!])\n");
325    } 
326    return ret;
327  } else {
328    char *ptr = NULL;
329    if (owl_perlconfig_is_function("owl::receive_msg")) {
330      ptr = owl_perlconfig_call_with_message(subname?subname
331                                       :"owl::_receive_msg_legacy_wrap", m);
332    }
333    if (ptr) owl_free(ptr);
334    return(NULL);
335  }
336}
337
338char *owl_perlconfig_perlcmd(owl_cmd *cmd, int argc, char **argv)
339{
340  int i, count;
341  char * ret = NULL;
342  STRLEN n_a;
343  dSP;
344
345  ENTER;
346  SAVETMPS;
347
348  PUSHMARK(SP);
349  for(i=0;i<argc;i++) {
350    XPUSHs(sv_2mortal(newSVpv(argv[i], 0)));
351  }
352  PUTBACK;
353
354  count = call_sv(cmd->cmd_perl, G_SCALAR|G_EVAL);
355
356  SPAGAIN;
357
358  if(SvTRUE(ERRSV)) {
359    owl_function_error("Error: %s", SvPV(ERRSV, n_a));
360    POPs;
361  } else {
362    if(count != 1)
363      croak("Perl command %s returned more than one value!", cmd->name);
364    SV * rv = POPs;
365    if(SvTRUE(rv)) {
366      ret = owl_strdup(SvPV(rv, n_a));
367    }
368  }
369
370  FREETMPS;
371  LEAVE;
372
373  return ret;
374}
375
376void owl_perlconfig_cmd_free(owl_cmd *cmd)
377{
378  SvREFCNT_dec(cmd);
379}
Note: See TracBrowser for help on using the repository browser.