1 #include <u.h> 2 #include <libc.h> 3 #include <bio.h> 4 #include <thread.h> 5 #include <ctype.h> 6 #include <plumb.h> 7 #include "dat.h" 8 9 static int replyid; 10 11 int 12 EQUAL(char *s, char *t) 13 { 14 while(tolower(*s) == tolower(*t++)) 15 if(*s++ == '\0') 16 return 1; 17 return 0; 18 } 19 20 void 21 mkreply(Message *m, char *label, char *to) 22 { 23 Message *r; 24 char *dir, *t; 25 26 r = emalloc(sizeof(Message)); 27 r->isreply = 1; 28 if(m != nil) 29 r->replyname = estrdup(m->name); 30 r->next = replies.head; 31 r->prev = nil; 32 if(replies.head != nil) 33 replies.head->prev = r; 34 replies.head = r; 35 if(replies.tail == nil) 36 replies.tail = r; 37 r->name = emalloc(strlen(mbox.name)+strlen(label)+10); 38 sprint(r->name, "%s%s%d", mbox.name, label, ++replyid); 39 r->w = newwindow(); 40 winname(r->w, r->name); 41 wintagwrite(r->w, "|fmt Post", 5+4); 42 r->tagposted = 1; 43 threadcreate(mesgctl, r, STACK); 44 winopenbody(r->w, OWRITE); 45 if(to!=nil && to[0]!='\0') 46 Bprint(r->w->body, "%s\n", to); 47 if(m != nil){ 48 dir = estrstrdup(mbox.name, m->name); 49 if(to == nil){ 50 /* Reply goes to replyto; Reply all goes to From and To and CC */ 51 if(strcmp(label, "Reply") == 0) 52 Bprint(r->w->body, "To: %s\n", m->replyto); 53 else{ /* Replyall */ 54 if(strlen(m->from) > 0) 55 Bprint(r->w->body, "To: %s\n", m->from); 56 if(strlen(m->to) > 0) 57 Bprint(r->w->body, "To: %s\n", m->to); 58 if(strlen(m->cc) > 0) 59 Bprint(r->w->body, "CC: %s\n", m->cc); 60 } 61 } 62 if(strlen(m->subject) > 0){ 63 t = "Subject: Re: "; 64 if(strlen(m->subject) >= 3) 65 if(tolower(m->subject[0])=='r' && tolower(m->subject[1])=='e' && m->subject[2]==':') 66 t = "Subject: "; 67 Bprint(r->w->body, "%s%s\n", t, m->subject); 68 } 69 Bprint(r->w->body, "Include: %sraw\n", dir); 70 free(dir); 71 } 72 Bprint(r->w->body, "\n"); 73 if(m == nil) 74 Bprint(r->w->body, "\n"); 75 winclosebody(r->w); 76 if(m == nil) 77 winselect(r->w, "0", 0); 78 else 79 winselect(r->w, "$", 0); 80 winclean(r->w); 81 windormant(r->w); 82 } 83 84 void 85 delreply(Message *m) 86 { 87 if(m->next == nil) 88 replies.tail = m->prev; 89 else 90 m->next->prev = m->prev; 91 if(m->prev == nil) 92 replies.head = m->next; 93 else 94 m->prev->next = m->next; 95 mesgfreeparts(m); 96 free(m); 97 } 98 99 enum 100 { 101 NARGS = 100, 102 NARGCHAR = 8*1024, 103 EXECSTACK = STACK+(NARGS+1)*sizeof(char*)+NARGCHAR 104 }; 105 106 struct Exec 107 { 108 char **argv; 109 int p[2]; 110 Channel *sync; 111 }; 112 113 /* copy argv to stack and free the incoming strings, so we don't leak argument vectors */ 114 void 115 buildargv(char **inargv, char *argv[NARGS+1], char args[NARGCHAR]) 116 { 117 int i, n; 118 char *s, *a; 119 120 s = args; 121 for(i=0; i<NARGS; i++){ 122 a = inargv[i]; 123 if(a == nil) 124 break; 125 n = strlen(a)+1; 126 if((s-args)+n >= NARGCHAR) /* too many characters */ 127 break; 128 argv[i] = s; 129 memmove(s, a, n); 130 s += n; 131 free(a); 132 } 133 argv[i] = nil; 134 } 135 136 void 137 execproc(void *v) 138 { 139 struct Exec *e; 140 int p[2]; 141 char *argv[NARGS+1], args[NARGCHAR]; 142 143 e = v; 144 p[0] = e->p[0]; 145 p[1] = e->p[1]; 146 rfork(RFFDG); 147 sendul(e->sync, 1); 148 buildargv(e->argv, argv, args); 149 free(e->argv); 150 chanfree(e->sync); 151 free(e); 152 dup(p[0], 0); 153 close(p[1]); 154 procexec(nil, "/bin/upas/marshal", argv); 155 threadprint(2, "Mail: can't exec %s: %r\n", argv[0]); 156 threadexits("can't exec"); 157 } 158 159 enum{ 160 ATTACH, 161 BCC, 162 CC, 163 FROM, 164 INCLUDE, 165 TO, 166 }; 167 168 char *headers[] = { 169 "attach:", 170 "bcc:", 171 "cc:", 172 "from:", 173 "include:", 174 "to:", 175 nil, 176 }; 177 178 int 179 whichheader(char *h) 180 { 181 int i; 182 183 for(i=0; headers[i]!=nil; i++) 184 if(EQUAL(h, headers[i])) 185 return i; 186 return -1; 187 } 188 189 char *tolist[200]; 190 char *cclist[200]; 191 char *bcclist[200]; 192 int ncc, nbcc, nto; 193 char *attlist[200]; 194 int rfc822[200]; 195 196 int 197 addressed(char *name) 198 { 199 int i; 200 201 for(i=0; i<nto; i++) 202 if(strcmp(name, tolist[i]) == 0) 203 return 1; 204 for(i=0; i<ncc; i++) 205 if(strcmp(name, cclist[i]) == 0) 206 return 1; 207 for(i=0; i<nbcc; i++) 208 if(strcmp(name, bcclist[i]) == 0) 209 return 1; 210 return 0; 211 } 212 213 char* 214 skipbl(char *s, char *e) 215 { 216 while(s < e){ 217 if(*s!=' ' && *s!='\t' && *s!=',') 218 break; 219 s++; 220 } 221 return s; 222 } 223 224 char* 225 findbl(char *s, char *e) 226 { 227 while(s < e){ 228 if(*s==' ' || *s=='\t' || *s==',') 229 break; 230 s++; 231 } 232 return s; 233 } 234 235 /* 236 * comma-separate possibly blank-separated strings in line; e points before newline 237 */ 238 void 239 commas(char *s, char *e) 240 { 241 char *t; 242 243 /* may have initial blanks */ 244 s = skipbl(s, e); 245 while(s < e){ 246 s = findbl(s, e); 247 if(s == e) 248 break; 249 t = skipbl(s, e); 250 if(t == e) /* no more words */ 251 break; 252 /* patch comma */ 253 *s++ = ','; 254 while(s < t) 255 *s++ = ' '; 256 } 257 } 258 259 void 260 mesgsend(Message *m) 261 { 262 char *s, *body, *to; 263 int i, j, h, n, natt, p[2]; 264 struct Exec *e; 265 Channel *sync; 266 int first, nfld, delit; 267 char *copy, *fld[100]; 268 269 body = winreadbody(m->w, &n); 270 /* assemble to: list from first line, to: line, and cc: line */ 271 nto = 0; 272 natt = 0; 273 ncc = 0; 274 nbcc = 0; 275 first = 1; 276 to = body; 277 for(;;){ 278 for(s=to; *s!='\n'; s++) 279 if(*s == '\0'){ 280 free(body); 281 return; 282 } 283 if(s++ == to) /* blank line */ 284 break; 285 /* make copy of line to tokenize */ 286 copy = emalloc(s-to); 287 memmove(copy, to, s-to); 288 copy[s-to-1] = '\0'; 289 nfld = tokenizec(copy, fld, nelem(fld), ", \t"); 290 if(nfld == 0){ 291 free(copy); 292 break; 293 } 294 n -= s-to; 295 switch(h = whichheader(fld[0])){ 296 case TO: 297 case FROM: 298 delit = (h == FROM); 299 commas(to+strlen(fld[0]), s-1); 300 for(i=1; i<nfld && nto<nelem(tolist); i++) 301 if(!addressed(fld[i])) 302 tolist[nto++] = estrdup(fld[i]); 303 break; 304 case BCC: 305 delit = 1; 306 commas(to+strlen(fld[0]), s-1); 307 for(i=1; i<nfld && nbcc<nelem(bcclist); i++) 308 if(!addressed(fld[i])) 309 bcclist[nbcc++] = estrdup(fld[i]); 310 break; 311 case CC: 312 delit = 0; 313 commas(to+strlen(fld[0]), s-1); 314 for(i=1; i<nfld && ncc<nelem(cclist); i++) 315 if(!addressed(fld[i])) 316 cclist[ncc++] = estrdup(fld[i]); 317 break; 318 case ATTACH: 319 case INCLUDE: 320 delit = 1; 321 for(i=1; i<nfld && natt<nelem(attlist); i++){ 322 attlist[natt] = estrdup(fld[i]); 323 rfc822[natt++] = (h == INCLUDE); 324 } 325 break; 326 default: 327 if(first){ 328 delit = 1; 329 for(i=0; i<nfld && nto<nelem(tolist); i++) 330 tolist[nto++] = estrdup(fld[i]); 331 }else /* ignore it */ 332 delit = 0; 333 break; 334 } 335 if(delit){ 336 /* delete line from body */ 337 memmove(to, s, n+1); 338 }else 339 to = s; 340 free(copy); 341 first = 0; 342 } 343 344 e = emalloc(sizeof(struct Exec)); 345 if(pipe(p) < 0) 346 error("Mail: can't create pipe\n"); 347 e->p[0] = p[0]; 348 e->p[1] = p[1]; 349 e->argv = emalloc((1+4*natt+nto+ncc+nbcc+1)*sizeof(char*)); 350 e->argv[0] = estrdup("marshal"); 351 j = 1; 352 for(i=0; i<natt; i++){ 353 if(rfc822[i]){ 354 e->argv[j++] = estrdup("-t"); 355 e->argv[j++] = estrdup("message/rfc822"); 356 e->argv[j++] = estrdup("-A"); 357 }else 358 e->argv[j++] = estrdup("-a"); 359 e->argv[j++] = attlist[i]; 360 } 361 for(i=0; i<nto; i++) 362 e->argv[j++] = tolist[i]; 363 for(i=0; i<ncc; i++) 364 e->argv[j++] = cclist[i]; 365 for(i=0; i<nbcc; i++) 366 e->argv[j++] = bcclist[i]; 367 sync = chancreate(sizeof(int), 0); 368 e->sync = sync; 369 proccreate(execproc, e, EXECSTACK); 370 recvul(sync); 371 close(p[0]); 372 373 i = strlen(body); 374 if(i > 0) 375 write(p[1], body, i); 376 377 /* guarantee a blank line, to ensure attachments are separated from body */ 378 if(i==0 || body[i-1]!='\n') 379 write(p[1], "\n\n", 2); 380 else if(i>1 && body[i-2]!='\n') 381 write(p[1], "\n", 1); 382 close(p[1]); 383 free(body); 384 385 if(m->replyname != nil) 386 mesgmenumark(mbox.w, m->replyname, "\t[replied]"); 387 if(m->name[0] == '/') 388 s = estrdup(m->name); 389 else 390 s = estrstrdup(mbox.name, m->name); 391 s = egrow(s, "-R", nil); 392 winname(m->w, s); 393 free(s); 394 winclean(m->w); 395 } 396