| 1 | #include <sys/types.h> |
| 2 | #include <sys/stat.h> |
| 3 | #include "stralloc.h" |
| 4 | #include "substdio.h" |
| 5 | #include "subfd.h" |
| 6 | #include "strset.h" |
| 7 | #include "sgetopt.h" |
| 8 | #include "readwrite.h" |
| 9 | #include "exit.h" |
| 10 | #include "strerr.h" |
| 11 | #include "env.h" |
| 12 | #include "sig.h" |
| 13 | #include "qmail.h" |
| 14 | #include "fmt.h" |
| 15 | #include "case.h" |
| 16 | #include "alloc.h" |
| 17 | #include "coe.h" |
| 18 | #include "seek.h" |
| 19 | #include "wait.h" |
| 20 | #include "fork.h" |
| 21 | |
| 22 | #define FATAL "fastforward: fatal: " |
| 23 | |
| 24 | void usage() |
| 25 | { |
| 26 | strerr_die1x(100,"fastforward: usage: fastforward [ -nNpP ] data.cdb"); |
| 27 | } |
| 28 | void nomem() |
| 29 | { |
| 30 | strerr_die2x(111,FATAL,"out of memory"); |
| 31 | } |
| 32 | |
| 33 | void print(s) |
| 34 | char *s; |
| 35 | { |
| 36 | char ch; |
| 37 | while (ch = *s++) { |
| 38 | substdio_put(subfderr,&ch,1); |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | void printsafe(s) |
| 43 | char *s; |
| 44 | { |
| 45 | char ch; |
| 46 | while (ch = *s++) { |
| 47 | if (ch < 32) ch = '_'; |
| 48 | substdio_put(subfderr,&ch,1); |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | struct qmail qq; |
| 53 | char qp[FMT_ULONG]; |
| 54 | char qqbuf[1]; |
| 55 | |
| 56 | int qqwrite(fd,buf,len) int fd; char *buf; int len; |
| 57 | { |
| 58 | qmail_put(&qq,buf,len); |
| 59 | return len; |
| 60 | } |
| 61 | |
| 62 | substdio ssqq = SUBSTDIO_FDBUF(qqwrite,-1,qqbuf,sizeof qqbuf); |
| 63 | |
| 64 | char messbuf[4096]; |
| 65 | substdio ssmess = SUBSTDIO_FDBUF(read,0,messbuf,sizeof messbuf); |
| 66 | |
| 67 | int flagdeliver = 1; |
| 68 | int flagpassthrough = 0; |
| 69 | |
| 70 | char *dtline; |
| 71 | stralloc sender = {0}; |
| 72 | stralloc programs = {0}; |
| 73 | stralloc forward = {0}; |
| 74 | |
| 75 | strset done; |
| 76 | stralloc todo = {0}; |
| 77 | |
| 78 | stralloc mailinglist = {0}; |
| 79 | |
| 80 | void dofile(fn) |
| 81 | char *fn; |
| 82 | { |
| 83 | int fd; |
| 84 | struct stat st; |
| 85 | int i; |
| 86 | int j; |
| 87 | |
| 88 | if (!stralloc_copys(&mailinglist,"")) nomem(); |
| 89 | |
| 90 | fd = open_read(fn); |
| 91 | if (fd == -1) |
| 92 | strerr_die4sys(111,FATAL,"unable to read ",fn,": "); |
| 93 | if (fstat(fd,&st) == -1) |
| 94 | strerr_die4sys(111,FATAL,"unable to stat ",fn,": "); |
| 95 | if ((st.st_mode & 0444) != 0444) |
| 96 | strerr_die3x(111,FATAL,fn," is not world-readable"); |
| 97 | if (slurpclose(fd,&mailinglist,1024) == -1) |
| 98 | strerr_die4sys(111,FATAL,"unable to read ",fn,": "); |
| 99 | |
| 100 | i = 0; |
| 101 | for (j = 0;j < mailinglist.len;++j) |
| 102 | if (!mailinglist.s[j]) { |
| 103 | if ((mailinglist.s[i] == '.') || (mailinglist.s[i] == '/')) { |
| 104 | if (!stralloc_cats(&todo,mailinglist.s + i)) nomem(); |
| 105 | if (!stralloc_0(&todo)) nomem(); |
| 106 | } |
| 107 | else if ((mailinglist.s[i] == '&') && (j - i < 900)) { |
| 108 | if (!stralloc_cats(&todo,mailinglist.s + i)) nomem(); |
| 109 | if (!stralloc_0(&todo)) nomem(); |
| 110 | } |
| 111 | i = j + 1; |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | char *fncdb; |
| 116 | int fdcdb; |
| 117 | stralloc key = {0}; |
| 118 | uint32 dlen; |
| 119 | stralloc data = {0}; |
| 120 | |
| 121 | void cdbreaderror() |
| 122 | { |
| 123 | strerr_die4sys(111,FATAL,"unable to read ",fncdb,": "); |
| 124 | } |
| 125 | |
| 126 | int findtarget(flagwild,prepend,addr) |
| 127 | int flagwild; |
| 128 | char *prepend; |
| 129 | char *addr; |
| 130 | { |
| 131 | int r; |
| 132 | int at; |
| 133 | |
| 134 | if (!stralloc_copys(&key,prepend)) nomem(); |
| 135 | if (!stralloc_cats(&key,addr)) nomem(); |
| 136 | case_lowerb(key.s,key.len); |
| 137 | |
| 138 | r = cdb_seek(fdcdb,key.s,key.len,&dlen); |
| 139 | if (r == -1) cdbreaderror(); |
| 140 | if (r) return 1; |
| 141 | |
| 142 | if (!flagwild) return 0; |
| 143 | at = str_rchr(addr,'@'); |
| 144 | if (!addr[at]) return 0; |
| 145 | |
| 146 | if (!stralloc_copys(&key,prepend)) nomem(); |
| 147 | if (!stralloc_cats(&key,addr + at)) nomem(); |
| 148 | case_lowerb(key.s,key.len); |
| 149 | |
| 150 | r = cdb_seek(fdcdb,key.s,key.len,&dlen); |
| 151 | if (r == -1) cdbreaderror(); |
| 152 | if (r) return 1; |
| 153 | |
| 154 | if (!stralloc_copys(&key,prepend)) nomem(); |
| 155 | if (!stralloc_catb(&key,addr,at + 1)) nomem(); |
| 156 | case_lowerb(key.s,key.len); |
| 157 | |
| 158 | r = cdb_seek(fdcdb,key.s,key.len,&dlen); |
| 159 | if (r == -1) cdbreaderror(); |
| 160 | if (r) return 1; |
| 161 | |
| 162 | return 0; |
| 163 | } |
| 164 | |
| 165 | int gettarget(flagwild,prepend,addr) |
| 166 | int flagwild; |
| 167 | char *prepend; |
| 168 | char *addr; |
| 169 | { |
| 170 | if (!findtarget(flagwild,prepend,addr)) return 0; |
| 171 | |
| 172 | if (!stralloc_ready(&data,(unsigned int) dlen)) nomem(); |
| 173 | data.len = dlen; |
| 174 | if (cdb_bread(fdcdb,data.s,data.len) == -1) cdbreaderror(); |
| 175 | |
| 176 | return 1; |
| 177 | } |
| 178 | |
| 179 | void doprogram(arg) |
| 180 | char *arg; |
| 181 | { |
| 182 | char *args[5]; |
| 183 | int child; |
| 184 | int wstat; |
| 185 | |
| 186 | if (!flagdeliver) { |
| 187 | print("run "); |
| 188 | printsafe(arg); |
| 189 | print("\n"); |
| 190 | substdio_flush(subfderr); |
| 191 | return; |
| 192 | } |
| 193 | |
| 194 | if (*arg == '!') { |
| 195 | args[0] = "preline"; |
| 196 | args[1] = "sh"; |
| 197 | args[2] = "-c"; |
| 198 | args[3] = arg + 1; |
| 199 | args[4] = 0; |
| 200 | } |
| 201 | else { |
| 202 | args[0] = "sh"; |
| 203 | args[1] = "-c"; |
| 204 | args[2] = arg + 1; |
| 205 | args[3] = 0; |
| 206 | } |
| 207 | |
| 208 | switch(child = vfork()) { |
| 209 | case -1: |
| 210 | strerr_die2sys(111,FATAL,"unable to fork: "); |
| 211 | case 0: |
| 212 | sig_pipedefault(); |
| 213 | execvp(*args,args); |
| 214 | strerr_die4sys(111,FATAL,"unable to run ",arg,": "); |
| 215 | } |
| 216 | |
| 217 | wait_pid(&wstat,child); |
| 218 | if (wait_crashed(wstat)) |
| 219 | strerr_die4sys(111,FATAL,"child crashed in ",arg,": "); |
| 220 | |
| 221 | switch(wait_exitcode(wstat)) { |
| 222 | case 64: case 65: case 70: case 76: case 77: case 78: case 112: |
| 223 | case 100: _exit(100); |
| 224 | case 0: break; |
| 225 | default: _exit(111); |
| 226 | } |
| 227 | |
| 228 | if (seek_begin(0) == -1) |
| 229 | strerr_die2sys(111,FATAL,"unable to rewind input: "); |
| 230 | } |
| 231 | |
| 232 | void dodata() |
| 233 | { |
| 234 | int i; |
| 235 | int j; |
| 236 | i = 0; |
| 237 | for (j = 0;j < data.len;++j) |
| 238 | if (!data.s[j]) { |
| 239 | if ((data.s[i] == '|') || (data.s[i] == '!')) |
| 240 | doprogram(data.s + i); |
| 241 | else if ((data.s[i] == '.') || (data.s[i] == '/')) { |
| 242 | if (!stralloc_cats(&todo,data.s + i)) nomem(); |
| 243 | if (!stralloc_0(&todo)) nomem(); |
| 244 | } |
| 245 | else if ((data.s[i] == '&') && (j - i < 900)) { |
| 246 | if (!stralloc_cats(&todo,data.s + i)) nomem(); |
| 247 | if (!stralloc_0(&todo)) nomem(); |
| 248 | } |
| 249 | i = j + 1; |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | void dorecip(addr) |
| 254 | char *addr; |
| 255 | { |
| 256 | |
| 257 | if (!findtarget(0,"?",addr)) |
| 258 | if (gettarget(0,":",addr)) { |
| 259 | dodata(); |
| 260 | return; |
| 261 | } |
| 262 | if (!stralloc_cats(&forward,addr)) nomem(); |
| 263 | if (!stralloc_0(&forward)) nomem(); |
| 264 | } |
| 265 | |
| 266 | void doorigrecip(addr) |
| 267 | char *addr; |
| 268 | { |
| 269 | if (sender.len) |
| 270 | if ((sender.len != 4) || byte_diff(sender.s,4,"#@[]")) |
| 271 | if (gettarget(1,"?",addr)) |
| 272 | if (!stralloc_copy(&sender,&data)) nomem(); |
| 273 | if (!gettarget(1,":",addr)) |
| 274 | if (flagpassthrough) |
| 275 | _exit(0); |
| 276 | else |
| 277 | strerr_die1x(100,"Sorry, no mailbox here by that name. (#5.1.1)"); |
| 278 | dodata(); |
| 279 | } |
| 280 | |
| 281 | stralloc recipient = {0}; |
| 282 | int flagdefault = 0; |
| 283 | |
| 284 | void main(argc,argv) |
| 285 | int argc; |
| 286 | char **argv; |
| 287 | { |
| 288 | int opt; |
| 289 | char *x; |
| 290 | int i; |
| 291 | |
| 292 | sig_pipeignore(); |
| 293 | |
| 294 | dtline = env_get("DTLINE"); |
| 295 | if (!dtline) dtline = ""; |
| 296 | |
| 297 | x = env_get("SENDER"); |
| 298 | if (!x) x = "original envelope sender"; |
| 299 | if (!stralloc_copys(&sender,x)) nomem(); |
| 300 | |
| 301 | if (!stralloc_copys(&forward,"")) nomem(); |
| 302 | if (!strset_init(&done)) nomem(); |
| 303 | |
| 304 | while ((opt = getopt(argc,argv,"nNpPdD")) != opteof) |
| 305 | switch(opt) { |
| 306 | case 'n': flagdeliver = 0; break; |
| 307 | case 'N': flagdeliver = 1; break; |
| 308 | case 'p': flagpassthrough = 1; break; |
| 309 | case 'P': flagpassthrough = 0; break; |
| 310 | case 'd': flagdefault = 1; break; |
| 311 | case 'D': flagdefault = 0; break; |
| 312 | default: usage(); |
| 313 | } |
| 314 | argv += optind; |
| 315 | |
| 316 | fncdb = *argv; |
| 317 | if (!fncdb) usage(); |
| 318 | fdcdb = open_read(fncdb); |
| 319 | if (fdcdb == -1) cdbreaderror(); |
| 320 | coe(fdcdb); |
| 321 | |
| 322 | if (flagdefault) { |
| 323 | x = env_get("DEFAULT"); |
| 324 | if (!x) x = env_get("EXT"); |
| 325 | if (!x) strerr_die2x(100,FATAL,"$DEFAULT or $EXT must be set"); |
| 326 | if (!stralloc_copys(&recipient,x)) nomem(); |
| 327 | if (!stralloc_cats(&recipient,"@")) nomem(); |
| 328 | x = env_get("HOST"); |
| 329 | if (!x) strerr_die2x(100,FATAL,"$HOST must be set"); |
| 330 | if (!stralloc_cats(&recipient,x)) nomem(); |
| 331 | if (!stralloc_0(&recipient)) nomem(); |
| 332 | x = recipient.s; |
| 333 | } |
| 334 | else { |
| 335 | x = env_get("RECIPIENT"); |
| 336 | if (!x) strerr_die2x(100,FATAL,"$RECIPIENT must be set"); |
| 337 | } |
| 338 | if (!strset_add(&done,x)) nomem(); |
| 339 | doorigrecip(x); |
| 340 | |
| 341 | while (todo.len) { |
| 342 | i = todo.len - 1; |
| 343 | while ((i > 0) && todo.s[i - 1]) --i; |
| 344 | todo.len = i; |
| 345 | |
| 346 | if (strset_in(&done,todo.s + i)) continue; |
| 347 | |
| 348 | x = alloc(str_len(todo.s + i) + 1); |
| 349 | if (!x) nomem(); |
| 350 | str_copy(x,todo.s + i); |
| 351 | if (!strset_add(&done,x)) nomem(); |
| 352 | |
| 353 | x = todo.s + i; |
| 354 | if (*x == 0) |
| 355 | continue; |
| 356 | else if ((*x == '.') || (*x == '/')) |
| 357 | dofile(x); |
| 358 | else |
| 359 | dorecip(x + 1); |
| 360 | } |
| 361 | |
| 362 | if (!forward.len) { |
| 363 | if (!flagdeliver) { |
| 364 | print("no forwarding\n"); |
| 365 | substdio_flush(subfderr); |
| 366 | } |
| 367 | _exit(flagpassthrough ? 99 : 0); |
| 368 | } |
| 369 | |
| 370 | if (!stralloc_0(&sender)) nomem(); |
| 371 | |
| 372 | if (!flagdeliver) { |
| 373 | print("from <"); |
| 374 | printsafe(sender.s); |
| 375 | print(">\n"); |
| 376 | while (forward.len) { |
| 377 | i = forward.len - 1; |
| 378 | while ((i > 0) && forward.s[i - 1]) --i; |
| 379 | forward.len = i; |
| 380 | print("to <"); |
| 381 | printsafe(forward.s + i); |
| 382 | print(">\n"); |
| 383 | } |
| 384 | substdio_flush(subfderr); |
| 385 | _exit(flagpassthrough ? 99 : 0); |
| 386 | } |
| 387 | |
| 388 | if (qmail_open(&qq) == -1) |
| 389 | strerr_die2sys(111,FATAL,"unable to fork: "); |
| 390 | qmail_puts(&qq,dtline); |
| 391 | if (substdio_copy(&ssqq,&ssmess) != 0) |
| 392 | strerr_die2sys(111,FATAL,"unable to read message: "); |
| 393 | substdio_flush(&ssqq); |
| 394 | qp[fmt_ulong(qp,qmail_qp(&qq))] = 0; |
| 395 | |
| 396 | qmail_from(&qq,sender.s); |
| 397 | |
| 398 | while (forward.len) { |
| 399 | i = forward.len - 1; |
| 400 | while ((i > 0) && forward.s[i - 1]) --i; |
| 401 | forward.len = i; |
| 402 | qmail_to(&qq,forward.s + i); |
| 403 | } |
| 404 | |
| 405 | x = qmail_close(&qq); |
| 406 | if (*x) strerr_die2x(*x == 'D' ? 100 : 111,FATAL,x + 1); |
| 407 | strerr_die2x(flagpassthrough ? 99 : 0,"fastforward: qp ",qp); |
| 408 | } |