| 1 | static char sccsid[] = "@(#)sub.c 4.5 (Berkeley) %G%"; |
| 2 | |
| 3 | /* |
| 4 | sub.c |
| 5 | |
| 6 | support procedures |
| 7 | |
| 8 | the following procedures end up reading the passwd file |
| 9 | or the passwdf file and are to be avoided. |
| 10 | |
| 11 | getpwuid(uid) |
| 12 | getpwnam(sn) |
| 13 | PwdCurrent() |
| 14 | getenv("HOME") maybe if hget, hgethome don't work |
| 15 | SnFromUid(uid) maybe if hashed passwd stuff doesn't work |
| 16 | SnCurrent() maybe if getlogin fails calls SnFromUid(uid) |
| 17 | getpwf() |
| 18 | passwdent(uid,sn) |
| 19 | */ |
| 20 | |
| 21 | # include "defs.h" |
| 22 | # include "config.h" |
| 23 | # include <varargs.h> |
| 24 | |
| 25 | /* global variables */ |
| 26 | int debugflg = DBV; /* debug flag */ |
| 27 | char local = LOCAL; /* the machine we're on */ |
| 28 | struct userinfo status; |
| 29 | |
| 30 | char netcmd[] = NETCMD; |
| 31 | char resfile[] = RESFILE; |
| 32 | char senddir[] = SENDDIR; |
| 33 | char Bsh[] = BINSH; |
| 34 | |
| 35 | char shomedir[100]; |
| 36 | |
| 37 | /* |
| 38 | passwdent() |
| 39 | |
| 40 | Read the password file looking for current user's entry. |
| 41 | Fill in the status structure. |
| 42 | Has the (dangerous) side effect of giving a value to getenv("HOME"). |
| 43 | */ |
| 44 | passwdent() |
| 45 | { |
| 46 | register char *u; |
| 47 | register struct passwd *pwd; |
| 48 | #ifdef CRN |
| 49 | register struct gecos *gcos; |
| 50 | #endif |
| 51 | pwd = PwdCurrent(); |
| 52 | if(pwd == NULL){ |
| 53 | err("Bad uid/username\n"); |
| 54 | return; |
| 55 | } |
| 56 | strcpy(status.localname,pwd->pw_name); |
| 57 | status.muid = guid(pwd->pw_uid,pwd->pw_gid); |
| 58 | status.mgid = pwd->pw_gid; |
| 59 | #ifdef CRN |
| 60 | if( (gcos=pwgecos( pwd->pw_gecos) ) == NULL ) |
| 61 | strcpy( status.jobno, MAGICCRN ); |
| 62 | else { |
| 63 | if( debugflg ) |
| 64 | debug( "crn found = %s\n", gcos->gc_crn ); |
| 65 | if( isalpha( gcos->gc_crn[0] ) || |
| 66 | isdigit( gcos->gc_crn[0] ) ) |
| 67 | strcpy( status.jobno, gcos->gc_crn ); |
| 68 | else |
| 69 | strcpy( status.jobno, MAGICCRN ); |
| 70 | } |
| 71 | #else |
| 72 | strcpy( status.jobno, "XYZZ" ); |
| 73 | #endif |
| 74 | strcpy(status.dir,pwd->pw_dir); |
| 75 | strcpy(shomedir,pwd->pw_dir); /* side effect */ |
| 76 | u = pwd->pw_shell; |
| 77 | if(u[0] == 0 || strcmp(u,"/bin/sbash") == 0)u= Bsh; |
| 78 | strcpy(status.loginshell,u); |
| 79 | } |
| 80 | /* |
| 81 | promptlogin(mchto) |
| 82 | |
| 83 | ask user for login and passwd on mchto. |
| 84 | make sure status.localname has a value before calling |
| 85 | this. One way is to call passwdent(). |
| 86 | */ |
| 87 | promptlogin(mchto) |
| 88 | char mchto; |
| 89 | { |
| 90 | char buf[BUFSIZ], mch; |
| 91 | FILE *wf; |
| 92 | int c; |
| 93 | if(status.login[0]==0 || status.force){ |
| 94 | buf[0] = 0; |
| 95 | wf = fopen("/dev/tty","r"); |
| 96 | if(wf != NULL){ |
| 97 | fprintf(stderr,"Name (%s:%s): ",longname(mchto), |
| 98 | status.localname); |
| 99 | if(fgets(buf, BUFSIZ, wf) != buf){ |
| 100 | perror("fgets"); |
| 101 | exit(EX_OSERR); |
| 102 | } |
| 103 | c = strlen(buf); |
| 104 | buf[c > 0 ? c-1 : 0] = 0; |
| 105 | if(c > 10){ |
| 106 | err("Login name too long.\n"); |
| 107 | exit(EX_USAGE); |
| 108 | } |
| 109 | if(FMemberSCh(buf,' ')){ |
| 110 | err("Login names don't have blanks in them.\n"); |
| 111 | exit(EX_USAGE); |
| 112 | } |
| 113 | fclose(wf); |
| 114 | } |
| 115 | if(buf[0] == 0)strcpy(buf,status.localname); |
| 116 | mch = MchSFromAddr(status.login,buf); |
| 117 | if(mch != local && mch != mchto){ |
| 118 | err("Must specify login name on %s machine\n", |
| 119 | longname(mchto)); |
| 120 | exit(EX_USAGE); |
| 121 | } |
| 122 | } |
| 123 | if(strcmp(status.login,"network") != 0 |
| 124 | && (status.mpasswd[0]== 0 || status.force)){ |
| 125 | sprintf(buf,"Password (%s:%s):", |
| 126 | longname(mchto), status.login); |
| 127 | strcpy(status.mpasswd,getpass(buf)); |
| 128 | } |
| 129 | if(status.login[0] == 0) strcpy(status.login,status.localname); |
| 130 | if(status.mpasswd[0] == 0)strcpy(status.mpasswd,"\"\""); |
| 131 | status.force = 0; |
| 132 | } |
| 133 | |
| 134 | #define tst(a,b) (*mode == 'r'? (b) : (a)) |
| 135 | #define RDR 0 |
| 136 | #define WTR 1 |
| 137 | static int popen_pid[20]; |
| 138 | |
| 139 | /* return a file descriptor suitable for writing, send to |
| 140 | user toaddress from fromaddress, |
| 141 | if cautious != 0 then don't do any forwarding |
| 142 | hopcnt is passed thru the mail program. |
| 143 | normal value is 0 |
| 144 | */ |
| 145 | FILE * |
| 146 | mailopen(toaddress, fromaddress, cautious, hopcnt) |
| 147 | char *toaddress, *fromaddress; |
| 148 | int cautious, hopcnt; |
| 149 | { |
| 150 | char cmd[100]; |
| 151 | char *mode = "w"; |
| 152 | int p[2]; |
| 153 | register myside, hisside, pid; |
| 154 | char shopcnt[20]; |
| 155 | |
| 156 | if(pipe(p) < 0) |
| 157 | return NULL; |
| 158 | myside = tst(p[WTR], p[RDR]); |
| 159 | hisside = tst(p[RDR], p[WTR]); |
| 160 | while((pid = fork()) == -1)sleep(2); |
| 161 | if(pid == 0) { |
| 162 | /* myside and hisside reverse roles in child */ |
| 163 | close(myside); |
| 164 | /* |
| 165 | dup2(hisside, tst(0, 1)); |
| 166 | */ |
| 167 | close(0); |
| 168 | dup(hisside); |
| 169 | close(hisside); |
| 170 | sprintf(shopcnt,"%d",hopcnt); |
| 171 | if(fromaddress != NULL){ |
| 172 | /* by convention, MAILFWD1 may forward this mail |
| 173 | and response messages shouldn't be forwarded */ |
| 174 | if(!cautious && !FMemberSCh(toaddress,'/')){ |
| 175 | # ifdef SENDMAIL |
| 176 | mexecl("/usr/lib/sendmail", |
| 177 | "sendmail", "-oee", "-r", fromaddress, |
| 178 | "-h",shopcnt, toaddress, 0); |
| 179 | # endif SENDMAIL |
| 180 | mexecl(MAILFWD1, "mail","-r",fromaddress, |
| 181 | "-h",shopcnt,toaddress,0); |
| 182 | } |
| 183 | mexecl(SYSMAIL2, "mail","-d","-r",fromaddress, |
| 184 | "-h", shopcnt,toaddress,0); |
| 185 | } else { |
| 186 | if(!cautious && !FMemberSCh(toaddress,'/')){ |
| 187 | # ifdef SENDMAIL |
| 188 | mexecl("/usr/lib/sendmail", |
| 189 | "sendmail", "-ee", "-h", shopcnt, |
| 190 | toaddress, 0); |
| 191 | # endif |
| 192 | mexecl(MAILFWD1, "mail","-h", shopcnt, |
| 193 | toaddress,0); |
| 194 | } |
| 195 | mexecl(SYSMAIL2, "mail","-d","-h", shopcnt,toaddress,0); |
| 196 | } |
| 197 | perror(SYSMAIL2); |
| 198 | exit(EX_UNAVAILABLE); |
| 199 | } |
| 200 | if(pid == -1) |
| 201 | return NULL; |
| 202 | popen_pid[myside] = pid; |
| 203 | close(hisside); |
| 204 | return(fdopen(myside, mode)); |
| 205 | } |
| 206 | |
| 207 | mailclose(ptr) |
| 208 | FILE *ptr; |
| 209 | { |
| 210 | register f, r, (*hstat)(), (*istat)(), (*qstat)(); |
| 211 | int status; |
| 212 | |
| 213 | f = fileno(ptr); |
| 214 | fclose(ptr); |
| 215 | istat = signal(SIGINT, SIG_IGN); |
| 216 | qstat = signal(SIGQUIT, SIG_IGN); |
| 217 | hstat = signal(SIGHUP, SIG_IGN); |
| 218 | while((r = wait(&status)) != popen_pid[f] && r != -1) |
| 219 | ; |
| 220 | if(r == -1) |
| 221 | status = -1; |
| 222 | signal(SIGINT, istat); |
| 223 | signal(SIGQUIT, qstat); |
| 224 | signal(SIGHUP, hstat); |
| 225 | return(status); |
| 226 | } |
| 227 | |
| 228 | /* |
| 229 | ch means 'a'-'z', inx in 0..25 |
| 230 | ch means '0'-'9', inx in 26..35 |
| 231 | */ |
| 232 | chtoinx(ch) { |
| 233 | if('a' <= ch && ch <= 'z') |
| 234 | return(ch - 'a'); |
| 235 | if('0' <= ch && ch <= '9') |
| 236 | return((ch - '0') + 26); |
| 237 | err("bad ch"); |
| 238 | } |
| 239 | |
| 240 | /* |
| 241 | inx is 0..25 means 'a'-'z' |
| 242 | inx is 26..35 means '0'-'9' |
| 243 | */ |
| 244 | inxtoch(inx) { |
| 245 | if(0 <= inx && inx <= 25) |
| 246 | return(inx + 'a'); |
| 247 | if(26 <= inx && inx <= 35) |
| 248 | return('0' + (inx - 26)); |
| 249 | err("bad ch"); |
| 250 | } |
| 251 | |
| 252 | /* determine through machine */ |
| 253 | gothru(from,to){ |
| 254 | register int i; |
| 255 | switch(from){ |
| 256 | # ifdef RAND |
| 257 | case 'a': i = configA[chtoinx(to)]; break; |
| 258 | case 'b': i = configB[chtoinx(to)]; break; |
| 259 | case 'c': i = configC[chtoinx(to)]; break; |
| 260 | # endif |
| 261 | # ifdef NOSC |
| 262 | case 'a': i = configA[chtoinx(to)]; break; |
| 263 | case 'c': i = configC[chtoinx(to)]; break; |
| 264 | case 'm': i = configM[chtoinx(to)]; break; |
| 265 | # endif |
| 266 | # ifdef BERKELEY |
| 267 | /* for Berkeley */ |
| 268 | case 'a': i = configA[chtoinx(to)]; break; |
| 269 | case 'b': i = configB[chtoinx(to)]; break; |
| 270 | case 'c': i = configC[chtoinx(to)]; break; |
| 271 | case 'd': i = configD[chtoinx(to)]; break; |
| 272 | case 'e': i = configE[chtoinx(to)]; break; |
| 273 | case 'f': i = configF[chtoinx(to)]; break; |
| 274 | case 'g': i = configG[chtoinx(to)]; break; |
| 275 | case 'h': i = configH[chtoinx(to)]; break; |
| 276 | case 'i': i = configI[chtoinx(to)]; break; |
| 277 | case 'j': i = configJ[chtoinx(to)]; break; |
| 278 | case 'k': i = configK[chtoinx(to)]; break; |
| 279 | case 'l': i = configL[chtoinx(to)]; break; |
| 280 | case 'm': i = configM[chtoinx(to)]; break; |
| 281 | case 'n': i = configN[chtoinx(to)]; break; |
| 282 | case 'o': i = configO[chtoinx(to)]; break; |
| 283 | case 'p': i = configP[chtoinx(to)]; break; |
| 284 | case 'r': i = configR[chtoinx(to)]; break; |
| 285 | case 's': i = configS[chtoinx(to)]; break; |
| 286 | case 't': i = configT[chtoinx(to)]; break; |
| 287 | case 'u': i = configU[chtoinx(to)]; break; |
| 288 | case 'v': i = configV[chtoinx(to)]; break; |
| 289 | case 'w': i = configW[chtoinx(to)]; break; |
| 290 | case 'x': i = configX[chtoinx(to)]; break; |
| 291 | case 'y': i = configY[chtoinx(to)]; break; |
| 292 | case 'z': i = configZ[chtoinx(to)]; break; |
| 293 | # endif |
| 294 | default: i = 0; break; |
| 295 | } |
| 296 | return(i); |
| 297 | } |
| 298 | |
| 299 | # define NPARMS 20 |
| 300 | /* prints out commands before executing them */ |
| 301 | /*VARARGS0*/ |
| 302 | mexecl(va_alist) |
| 303 | va_dcl |
| 304 | { |
| 305 | char *arr[NPARMS], *file, *f; |
| 306 | va_list ap; |
| 307 | register int i; |
| 308 | va_start(ap); |
| 309 | file = va_arg(ap, char *); |
| 310 | i = 0; |
| 311 | while(f = va_arg(ap, char *)){ |
| 312 | if(i >= NPARMS){ |
| 313 | err("too many args"); |
| 314 | arr[NPARMS-1] = NULL; |
| 315 | break; |
| 316 | } |
| 317 | if(debugflg) err("'%s' ",f); |
| 318 | arr[i++] = f; |
| 319 | } |
| 320 | arr[i] = NULL; |
| 321 | va_end(ap); |
| 322 | if(debugflg) putc('\n',stderr); |
| 323 | execv(file, arr); |
| 324 | } |
| 325 | |
| 326 | /* prints out commands before executing them */ |
| 327 | mexecv(s,p) |
| 328 | register char *s, **p;{ |
| 329 | register int i; |
| 330 | if(debugflg){ |
| 331 | err("'%s' ",s); |
| 332 | for(i=0; p[i]; i++)err("'%s' ",p[i]); |
| 333 | putc('\n',stderr); |
| 334 | } |
| 335 | execv(s,p); |
| 336 | } |
| 337 | |
| 338 | /*VARARGS0*/ |
| 339 | /* fills in -l - -p from commands like rcp */ |
| 340 | /* must be called with at least two arguments */ |
| 341 | kexecl(va_alist) |
| 342 | va_dcl |
| 343 | { |
| 344 | char *a[NPARMS], i = 1, *file; |
| 345 | va_list ap; |
| 346 | va_start(ap); |
| 347 | file = va_arg(ap, char *); |
| 348 | a[0] = va_arg(ap, char *); |
| 349 | if(status.login[0]){ |
| 350 | a[i++] = "-l"; |
| 351 | a[i++] = status.login; |
| 352 | } |
| 353 | if(status.mpasswd[0]){ |
| 354 | a[i++] = "-p"; |
| 355 | a[i++] = status.mpasswd; |
| 356 | } |
| 357 | if(status.nonotify)a[i++] = "-b"; |
| 358 | if(status.force) a[i++] = "-f"; |
| 359 | if(status.quiet) a[i++] = "-q"; |
| 360 | if(status.nowrite) a[i++] = "-n"; |
| 361 | while (a[i++] = va_arg(ap, char *)){ |
| 362 | if(i >= NPARMS){ |
| 363 | err("too many args"); |
| 364 | a[NPARMS-1] = NULL; |
| 365 | break; |
| 366 | } |
| 367 | }; |
| 368 | mexecv(file, a); |
| 369 | } |
| 370 | |
| 371 | /* |
| 372 | MchSFromAddr(sn,addr) |
| 373 | |
| 374 | take an address of the form "mach:username" |
| 375 | and return mch as the 1 char code of "mach" and |
| 376 | in sn put "username". |
| 377 | If addr has no colon in it, return mch==local, sn==addr. |
| 378 | Return 0 for mch if host unknown. |
| 379 | */ |
| 380 | MchSFromAddr(sn,addr) |
| 381 | char *sn, *addr; |
| 382 | { |
| 383 | char fcolon = 0, *s, mch, stemp[BUFSIZ]; |
| 384 | |
| 385 | /* assume addr is a local address */ |
| 386 | |
| 387 | strcpy(stemp,addr); |
| 388 | s = stemp; |
| 389 | while(*s){ |
| 390 | if(*s == ':'){ |
| 391 | fcolon = 1; |
| 392 | *s++ = 0; |
| 393 | break; |
| 394 | } |
| 395 | s++; |
| 396 | } |
| 397 | if(fcolon != 1){ |
| 398 | /* sn better be the right size for addr */ |
| 399 | mch = local; |
| 400 | strcpy(sn,addr); |
| 401 | return(mch); |
| 402 | } |
| 403 | |
| 404 | /* addr has a colon in it, s pts to name */ |
| 405 | mch = lookup(stemp); |
| 406 | strcpy(sn,s); |
| 407 | return(mch); |
| 408 | } |
| 409 | |
| 410 | |
| 411 | /* returns a single character for machine S */ |
| 412 | /* returns 0 for unknown host */ |
| 413 | lookup(s) |
| 414 | register char *s; { |
| 415 | register struct tt *t; |
| 416 | if(strlen(s) == 1)return(isupper(*s) ? tolower(*s) : *s); |
| 417 | for(t = table; t->bigname; t++) |
| 418 | if(streql(s,t->bigname) == 0)return(t->lname); |
| 419 | return(0); |
| 420 | } |
| 421 | |
| 422 | /* returns a long name (string) for single character machine c */ |
| 423 | char *longname(c) |
| 424 | register char c; |
| 425 | { |
| 426 | register struct tt *t; |
| 427 | if(c == 0)return("UNKNOWN"); |
| 428 | for(t = table; t->bigname; t++) |
| 429 | if(c == t->lname)return(t->bigname); |
| 430 | return("UNKNOWN"); |
| 431 | } |
| 432 | /* |
| 433 | FMemberSCh(s,ch) |
| 434 | |
| 435 | return 1 if ch is a character in string s. |
| 436 | 0 otherwise. |
| 437 | */ |
| 438 | FMemberSCh(s,ch) |
| 439 | register char *s, ch; |
| 440 | { |
| 441 | while(*s)if(*s++ == ch)return(1); |
| 442 | return(0); |
| 443 | } |
| 444 | |
| 445 | /* return a static string with the form "X hrs X mins X secs" */ |
| 446 | /* t is # of secs */ |
| 447 | char *comptime(t) |
| 448 | long t; { |
| 449 | static char str[30]; |
| 450 | char buf[20]; |
| 451 | long w; |
| 452 | str[0] = 0; |
| 453 | w = t/3600L; |
| 454 | if(w > 0L){ |
| 455 | sprintf(buf,"%ld hr ",w); |
| 456 | strcat(str,buf); |
| 457 | } |
| 458 | t = t % 3600L; |
| 459 | w = t/60L; |
| 460 | if(w > 0L){ |
| 461 | sprintf(buf,"%ld min ",w); |
| 462 | strcat(str,buf); |
| 463 | } |
| 464 | t = t % 60L; |
| 465 | sprintf(buf,"%ld sec",t); |
| 466 | strcat(str,buf); |
| 467 | return(str); |
| 468 | } |
| 469 | /* |
| 470 | parseparmlist(string) |
| 471 | |
| 472 | parses variable parameter lists in string, |
| 473 | as defined in genparmlist in net.c |
| 474 | */ |
| 475 | parseparmlist(parmlist) |
| 476 | char *parmlist; |
| 477 | { |
| 478 | while(*parmlist && *parmlist != '(')parmlist++; |
| 479 | } |
| 480 | |
| 481 | /* just like strcmp except upper- and lower-case are ignored */ |
| 482 | streql(s1,s2) |
| 483 | char *s1, *s2; { |
| 484 | char a,b; |
| 485 | while(*s1 && *s2){ |
| 486 | a = isupper(*s1) ? tolower(*s1) : *s1; |
| 487 | b = isupper(*s2) ? tolower(*s2) : *s2; |
| 488 | if(a < b)return(-1); |
| 489 | if(a > b)return(1); |
| 490 | s1++, s2++; |
| 491 | } |
| 492 | if(*s2)return(-1); |
| 493 | if(*s1)return(1); |
| 494 | return(0); |
| 495 | } |
| 496 | /* VARARGS0 */ |
| 497 | err(s,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r) { |
| 498 | fprintf(stderr,s,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r); |
| 499 | } |