1 /* 2 * sh.c: Main shell routines 3 */ 4 /*- 5 * Copyright (c) 1980, 1991 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 #define EXTERN /* Intern */ 33 #include "sh.h" 34 35 #ifndef lint 36 char copyright[] = 37 "@(#) Copyright (c) 1991 The Regents of the University of California.\n\ 38 All rights reserved.\n"; 39 #endif /* not lint */ 40 41 #include "tc.h" 42 #include "ed.h" 43 #include "tw.h" 44 45 extern int MapsAreInited; 46 extern int NLSMapsAreInited; 47 48 /* 49 * C Shell 50 * 51 * Bill Joy, UC Berkeley, California, USA 52 * October 1978, May 1980 53 * 54 * Jim Kulp, IIASA, Laxenburg, Austria 55 * April 1980 56 * 57 * Filename recognition added: 58 * Ken Greer, Ind. Consultant, Palo Alto CA 59 * October 1983. 60 * 61 * Karl Kleinpaste, Computer Consoles, Inc. 62 * Added precmd, periodic/tperiod, prompt changes, 63 * directory stack hack, and login watch. 64 * Sometime March 1983 - Feb 1984. 65 * 66 * Added scheduled commands, including the "sched" command, 67 * plus the call to sched_run near the precmd et al 68 * routines. 69 * Upgraded scheduled events for running events while 70 * sitting idle at command input. 71 * 72 * Paul Placeway, Ohio State 73 * added stuff for running with twenex/inputl 9 Oct 1984. 74 * 75 * ported to Apple Unix (TM) (OREO) 26 -- 29 Jun 1987 76 */ 77 78 jmp_buf_t reslab IZERO_STRUCT; 79 struct wordent paraml IZERO_STRUCT; 80 81 static const char tcshstr[] = "tcsh"; 82 83 struct sigaction parintr; /* Parents interrupt catch */ 84 struct sigaction parterm; /* Parents terminate catch */ 85 86 #ifdef TESLA 87 int do_logout = 0; 88 #endif /* TESLA */ 89 90 91 int use_fork = 0; /* use fork() instead of vfork()? */ 92 93 /* 94 * Magic pointer values. Used to specify other invalid conditions aside 95 * from null. 96 */ 97 static Char INVCHAR; 98 Char *INVPTR = &INVCHAR; 99 Char **INVPPTR = &INVPTR; 100 101 static int fast = 0; 102 static int mflag = 0; 103 static int prompt = 1; 104 int enterhist = 0; 105 int tellwhat = 0; 106 time_t t_period; 107 Char *ffile = NULL; 108 int dolzero = 0; 109 int insource = 0; 110 int exitset = 0; 111 static time_t chktim; /* Time mail last checked */ 112 char *progname; 113 int tcsh; 114 115 /* 116 * This preserves the input state of the shell. It is used by 117 * st_save and st_restore to manupulate shell state. 118 */ 119 struct saved_state { 120 int insource; 121 int OLDSTD; 122 int SHIN; 123 int SHOUT; 124 int SHDIAG; 125 int intty; 126 struct whyle *whyles; 127 Char *gointr; 128 Char *arginp; 129 Char *evalp; 130 Char **evalvec; 131 Char *alvecp; 132 Char **alvec; 133 int onelflg; 134 int enterhist; 135 Char **argv; 136 Char **av; 137 Char HIST; 138 int cantell; 139 struct Bin B; 140 int justpr; 141 }; 142 143 static int srccat (Char *, Char *); 144 #ifndef WINNT_NATIVE 145 static int srcfile (const char *, int, int, Char **); 146 #else 147 int srcfile (const char *, int, int, Char **); 148 #endif /*WINNT_NATIVE*/ 149 static void srcunit (int, int, int, Char **); 150 static void mailchk (void); 151 #ifndef _PATH_DEFPATH 152 static Char **defaultpath (void); 153 #endif 154 static void record (void); 155 static void st_save (struct saved_state *, int, int, 156 Char **, Char **); 157 static void st_restore (void *); 158 159 int main (int, char **); 160 161 #ifndef LOCALEDIR 162 #define LOCALEDIR "/usr/share/locale" 163 #endif 164 165 #ifdef NLS_CATALOGS 166 static void 167 add_localedir_to_nlspath(const char *path) 168 { 169 static const char msgs_LOC[] = "/%L/LC_MESSAGES/%N.cat"; 170 static const char msgs_lang[] = "/%l/LC_MESSAGES/%N.cat"; 171 char *old; 172 char *new, *new_p; 173 size_t len; 174 int add_LOC = 1; 175 int add_lang = 1; 176 char trypath[MAXPATHLEN]; 177 struct stat st; 178 179 if (path == NULL) 180 return; 181 182 (void) xsnprintf(trypath, sizeof(trypath), "%s/en/LC_MESSAGES/tcsh.cat", 183 path); 184 if (stat(trypath, &st) == -1) 185 return; 186 187 if ((old = getenv("NLSPATH")) != NULL) 188 len = strlen(old) + 1; /* don't forget the colon. */ 189 else 190 len = 0; 191 192 len += 2 * strlen(path) + 193 sizeof(msgs_LOC) + sizeof(msgs_lang); /* includes the extra colon */ 194 195 new = new_p = xcalloc(len, 1); 196 197 if (old != NULL) { 198 size_t pathlen = strlen(path); 199 char *old_p; 200 201 (void) xsnprintf(new_p, len, "%s", old); 202 new_p += strlen(new_p); 203 len -= new_p - new; 204 205 /* Check if the paths we try to add are already present in NLSPATH. 206 If so, note it by setting the appropriate flag to 0. */ 207 for (old_p = old; old_p; old_p = strchr(old_p, ':'), 208 old_p = old_p ? old_p + 1 : NULL) { 209 if (strncmp(old_p, path, pathlen) != 0) 210 continue; 211 if (strncmp(old_p + pathlen, msgs_LOC, sizeof(msgs_LOC) - 1) == 0) 212 add_LOC = 0; 213 else if (strncmp(old_p + pathlen, msgs_lang, 214 sizeof(msgs_lang) - 1) == 0) 215 add_lang = 0; 216 } 217 } 218 219 /* Add the message catalog paths not already present to NLSPATH. */ 220 if (add_LOC || add_lang) 221 (void) xsnprintf(new_p, len, "%s%s%s%s%s%s", 222 old ? ":" : "", 223 add_LOC ? path : "", add_LOC ? msgs_LOC : "", 224 add_LOC && add_lang ? ":" : "", 225 add_lang ? path : "", add_lang ? msgs_lang : ""); 226 227 tsetenv(STRNLSPATH, str2short(new)); 228 free(new); 229 } 230 #endif 231 232 int 233 main(int argc, char **argv) 234 { 235 int batch = 0; 236 volatile int nexececho = 0; 237 int nofile = 0; 238 volatile int nverbose = 0; 239 volatile int rdirs = 0; 240 int quitit = 0; 241 Char *cp; 242 #ifdef AUTOLOGOUT 243 Char *cp2; 244 #endif 245 char *tcp, *ttyn; 246 int f, reenter; 247 char **tempv; 248 static const char *targinp = NULL; 249 int osetintr; 250 struct sigaction oparintr; 251 252 #ifdef WINNT_NATIVE 253 nt_init(); 254 #endif /* WINNT_NATIVE */ 255 256 (void)memset(&reslab, 0, sizeof(reslab)); 257 #if defined(NLS_CATALOGS) && defined(LC_MESSAGES) 258 (void) setlocale(LC_MESSAGES, ""); 259 #endif /* NLS_CATALOGS && LC_MESSAGES */ 260 261 #ifdef NLS 262 # ifdef LC_CTYPE 263 (void) setlocale(LC_CTYPE, ""); /* for iscntrl */ 264 # endif /* LC_CTYPE */ 265 #endif /* NLS */ 266 267 STR_environ = blk2short(environ); 268 environ = short2blk(STR_environ); /* So that we can free it */ 269 270 #ifdef NLS_CATALOGS 271 add_localedir_to_nlspath(LOCALEDIR); 272 #endif 273 274 nlsinit(); 275 initlex(¶ml); 276 277 #ifdef MALLOC_TRACE 278 mal_setstatsfile(fdopen(dmove(xopen("/tmp/tcsh.trace", 279 O_WRONLY|O_CREAT|O_LARGEFILE, 0666), 25), "w")); 280 mal_trace(1); 281 #endif /* MALLOC_TRACE */ 282 283 #if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX) 284 # ifdef _SC_CLK_TCK 285 clk_tck = (clock_t) sysconf(_SC_CLK_TCK); 286 # else /* ! _SC_CLK_TCK */ 287 # ifdef CLK_TCK 288 clk_tck = CLK_TCK; 289 # else /* !CLK_TCK */ 290 clk_tck = HZ; 291 # endif /* CLK_TCK */ 292 # endif /* _SC_CLK_TCK */ 293 #endif /* !BSDTIMES && POSIX */ 294 295 settimes(); /* Immed. estab. timing base */ 296 #ifdef TESLA 297 do_logout = 0; 298 #endif /* TESLA */ 299 300 /* 301 * Make sure we have 0, 1, 2 open 302 * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr) 303 */ 304 { 305 do 306 if ((f = xopen(_PATH_DEVNULL, O_RDONLY|O_LARGEFILE)) == -1 && 307 (f = xopen("/", O_RDONLY|O_LARGEFILE)) == -1) 308 exit(1); 309 while (f < 3); 310 xclose(f); 311 } 312 313 osinit(); /* Os dependent initialization */ 314 315 316 { 317 char *t; 318 319 t = strrchr(argv[0], '/'); 320 #ifdef WINNT_NATIVE 321 { 322 char *s = strrchr(argv[0], '\\'); 323 if (s) 324 t = s; 325 } 326 #endif /* WINNT_NATIVE */ 327 t = t ? t + 1 : argv[0]; 328 if (*t == '-') t++; 329 progname = strsave((t && *t) ? t : tcshstr); /* never want a null */ 330 tcsh = strncmp(progname, tcshstr, sizeof(tcshstr) - 1) == 0; 331 } 332 333 /* 334 * Initialize non constant strings 335 */ 336 #ifdef _PATH_BSHELL 337 STR_BSHELL = SAVE(_PATH_BSHELL); 338 #endif 339 #ifdef _PATH_TCSHELL 340 STR_SHELLPATH = SAVE(_PATH_TCSHELL); 341 #else 342 # ifdef _PATH_CSHELL 343 STR_SHELLPATH = SAVE(_PATH_CSHELL); 344 # endif 345 #endif 346 STR_WORD_CHARS = SAVE(WORD_CHARS); 347 STR_WORD_CHARS_VI = SAVE(WORD_CHARS_VI); 348 349 HIST = '!'; 350 HISTSUB = '^'; 351 PRCH = tcsh ? '>' : '%'; /* to replace %# in $prompt for normal users */ 352 PRCHROOT = '#'; /* likewise for root */ 353 word_chars = STR_WORD_CHARS; 354 bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */ 355 anyerror = 1; /* for compatibility */ 356 setcopy(STRanyerror, STRNULL, VAR_READWRITE); 357 358 /* Default history size to 100 */ 359 setcopy(STRhistory, str2short("100"), VAR_READWRITE); 360 sethistory(100); 361 362 tempv = argv; 363 ffile = SAVE(tempv[0]); 364 dolzero = 0; 365 if (eq(ffile, STRaout)) /* A.out's are quittable */ 366 quitit = 1; 367 uid = getuid(); 368 gid = getgid(); 369 euid = geteuid(); 370 egid = getegid(); 371 /* 372 * We are a login shell if: 1. we were invoked as -<something> with 373 * optional arguments 2. or we were invoked only with the -l flag 374 */ 375 loginsh = (**tempv == '-') || (argc == 2 && 376 tempv[1][0] == '-' && tempv[1][1] == 'l' && 377 tempv[1][2] == '\0'); 378 #ifdef _VMS_POSIX 379 /* No better way to find if we are a login shell */ 380 if (!loginsh) { 381 loginsh = (argc == 1 && getppid() == 1); 382 **tempv = '-'; /* Avoid giving VMS an acidic stomach */ 383 } 384 #endif /* _VMS_POSIX */ 385 386 if (loginsh && **tempv != '-') { 387 char *argv0; 388 389 /* 390 * Mangle the argv space 391 */ 392 tempv[1][0] = '\0'; 393 tempv[1][1] = '\0'; 394 tempv[1] = NULL; 395 argv0 = strspl("-", *tempv); 396 *tempv = argv0; 397 argc--; 398 } 399 if (loginsh) { 400 (void) time(&chktim); 401 setNS(STRloginsh); 402 } 403 404 NoNLSRebind = getenv("NOREBIND") != NULL; 405 #ifdef NLS 406 # ifdef SETLOCALEBUG 407 dont_free = 1; 408 # endif /* SETLOCALEBUG */ 409 (void) setlocale(LC_ALL, ""); 410 # ifdef LC_COLLATE 411 (void) setlocale(LC_COLLATE, ""); 412 # endif 413 # ifdef SETLOCALEBUG 414 dont_free = 0; 415 # endif /* SETLOCALEBUG */ 416 # ifdef STRCOLLBUG 417 fix_strcoll_bug(); 418 # endif /* STRCOLLBUG */ 419 420 /* 421 * On solaris ISO8859-1 contains no printable characters in the upper half 422 * so we need to test only for MB_CUR_MAX == 1, otherwise for multi-byte 423 * locales we are always AsciiOnly == 0. 424 */ 425 if (MB_CUR_MAX == 1) { 426 int k; 427 428 for (k = 0200; k <= 0377 && !isprint(CTL_ESC(k)); k++) 429 continue; 430 AsciiOnly = k > 0377; 431 } else 432 AsciiOnly = 0; 433 #else 434 AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL; 435 #endif /* NLS */ 436 if (MapsAreInited && !NLSMapsAreInited) 437 ed_InitNLSMaps(); 438 ResetArrowKeys(); 439 440 /* 441 * Initialize for periodic command intervals. Also, initialize the dummy 442 * tty list for login-watch. 443 */ 444 (void) time(&t_period); 445 #ifndef HAVENOUTMP 446 initwatch(); 447 #endif /* !HAVENOUTMP */ 448 449 #if defined(alliant) 450 /* 451 * From: Jim Pace <jdp@research.att.com> 452 * tcsh does not work properly on the alliants through an rlogin session. 453 * The shell generally hangs. Also, reference to the controlling terminal 454 * does not work ( ie: echo foo > /dev/tty ). 455 * 456 * A security feature was added to rlogind affecting FX/80's Concentrix 457 * from revision 5.5.xx upwards (through 5.7 where this fix was implemented) 458 * This security change also affects the FX/2800 series. 459 * The security change to rlogind requires the process group of an rlogin 460 * session become disassociated with the tty in rlogind. 461 * 462 * The changes needed are: 463 * 1. set the process group 464 * 2. reenable the control terminal 465 */ 466 if (loginsh && isatty(SHIN)) { 467 ttyn = ttyname(SHIN); 468 xclose(SHIN); 469 SHIN = xopen(ttyn, O_RDWR|O_LARGEFILE); 470 shpgrp = getpid(); 471 (void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp); 472 (void) setpgid(0, shpgrp); 473 } 474 #endif /* alliant */ 475 476 /* 477 * Move the descriptors to safe places. The variable didfds is 0 while we 478 * have only FSH* to work with. When didfds is true, we have 0,1,2 and 479 * prefer to use these. 480 */ 481 initdesc(); 482 483 cdtohome = 1; 484 setv(STRcdtohome, SAVE(""), VAR_READWRITE); 485 486 /* 487 * Get and set the tty now 488 */ 489 if ((ttyn = ttyname(SHIN)) != NULL) { 490 /* 491 * Could use rindex to get rid of other possible path components, but 492 * hpux preserves the subdirectory /pty/ when storing the tty name in 493 * utmp, so we keep it too. 494 */ 495 if (strncmp(ttyn, "/dev/", 5) == 0) 496 setv(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE); 497 else 498 setv(STRtty, cp = SAVE(ttyn), VAR_READWRITE); 499 } 500 else 501 setv(STRtty, cp = SAVE(""), VAR_READWRITE); 502 503 /* 504 * Initialize the shell variables. ARGV and PROMPT are initialized later. 505 * STATUS is also munged in several places. CHILD is munged when 506 * forking/waiting 507 */ 508 509 /* 510 * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and 511 * on shells running as root. Out of these, autologout should NOT be set 512 * for any psudo-terminals (this catches most window systems) and not for 513 * any terminal running X windows. 514 * 515 * At Ohio State, we have had problems with a user having his X session 516 * drop out from under him (on a Sun) because the shell in his master 517 * xterm timed out and exited. 518 * 519 * Really, this should be done with a program external to the shell, that 520 * watches for no activity (and NO running programs, such as dump) on a 521 * terminal for a long peroid of time, and then SIGHUPS the shell on that 522 * terminal. 523 * 524 * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things 525 * allways first check to see if loginsh or really root, then do things 526 * with ttyname() 527 * 528 * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the 529 * value of cp before using it! ("root can rsh too") 530 * 531 * PWP: keep the nested ifs; the order of the tests matters and a good 532 * (smart) C compiler might re-arange things wrong. 533 */ 534 #ifdef AUTOLOGOUT 535 # ifdef convex 536 if (uid == 0) 537 /* root always has a 15 minute autologout */ 538 setcopy(STRautologout, STRrootdefautologout, VAR_READWRITE); 539 else 540 if (loginsh) 541 /* users get autologout set to 0 */ 542 setcopy(STRautologout, STR0, VAR_READWRITE); 543 # else /* convex */ 544 if (loginsh || (uid == 0)) { 545 if (*cp) { 546 /* only for login shells or root and we must have a tty */ 547 if (((cp2 = Strrchr(cp, (Char) '/')) != NULL) && 548 (Strncmp(cp, STRptssl, 3) != 0)) { 549 cp2 = cp2 + 1; 550 } 551 else 552 cp2 = cp; 553 if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) || 554 Strstr(cp, STRptssl) != NULL)) { 555 if (getenv("DISPLAY") == NULL) { 556 /* NOT on X window shells */ 557 setcopy(STRautologout, STRdefautologout, VAR_READWRITE); 558 } 559 } 560 } 561 } 562 # endif /* convex */ 563 #endif /* AUTOLOGOUT */ 564 565 sigset_interrupting(SIGALRM, queue_alrmcatch); 566 567 setcopy(STRstatus, STR0, VAR_READWRITE); 568 569 /* 570 * get and set machine specific environment variables 571 */ 572 getmachine(); 573 574 575 /* 576 * Publish the selected echo style 577 */ 578 #if ECHO_STYLE != BSD_ECHO 579 if (tcsh) { 580 # if ECHO_STYLE == NONE_ECHO 581 setcopy(STRecho_style, STRnone, VAR_READWRITE); 582 # endif /* ECHO_STYLE == NONE_ECHO */ 583 # if ECHO_STYLE == SYSV_ECHO 584 setcopy(STRecho_style, STRsysv, VAR_READWRITE); 585 # endif /* ECHO_STYLE == SYSV_ECHO */ 586 # if ECHO_STYLE == BOTH_ECHO 587 setcopy(STRecho_style, STRboth, VAR_READWRITE); 588 # endif /* ECHO_STYLE == BOTH_ECHO */ 589 } else 590 #endif /* ECHO_STYLE != BSD_ECHO */ 591 setcopy(STRecho_style, STRbsd, VAR_READWRITE); 592 593 /* 594 * increment the shell level. 595 */ 596 shlvl(1); 597 598 #ifdef __ANDROID__ 599 /* On Android, $HOME either isn't set or set to /data, a R/O location. 600 Check for the environment variable EXTERNAL_STORAGE, which contains 601 the mount point of the external storage (SD card, mostly). If 602 EXTERNAL_STORAGE isn't set fall back to "/sdcard". Eventually 603 override $HOME so the environment is on the same page. */ 604 if (((tcp = getenv("HOME")) != NULL && strcmp (tcp, "/data") != 0) 605 || (tcp = getenv("EXTERNAL_STORAGE")) != NULL) { 606 cp = quote(SAVE(tcp)); 607 } else 608 cp = quote(SAVE("/sdcard")); 609 tsetenv(STRKHOME, cp); 610 #else 611 if ((tcp = getenv("HOME")) != NULL) 612 cp = quote(SAVE(tcp)); 613 else 614 cp = NULL; 615 #endif 616 617 if (cp == NULL) 618 fast = 1; /* No home -> can't read scripts */ 619 else 620 setv(STRhome, cp, VAR_READWRITE); 621 622 dinit(cp); /* dinit thinks that HOME == cwd in a login 623 * shell */ 624 /* 625 * Grab other useful things from the environment. Should we grab 626 * everything?? 627 */ 628 { 629 char *cln, *cus, *cgr; 630 struct passwd *pw; 631 struct group *gr; 632 633 634 #ifdef apollo 635 int oid = getoid(); 636 637 setv(STRoid, Itoa(oid, 0, 0), VAR_READWRITE); 638 #endif /* apollo */ 639 640 setv(STReuid, Itoa(euid, 0, 0), VAR_READWRITE); 641 if ((pw = xgetpwuid(euid)) == NULL) 642 setcopy(STReuser, STRunknown, VAR_READWRITE); 643 else 644 setcopy(STReuser, str2short(pw->pw_name), VAR_READWRITE); 645 646 setv(STRuid, Itoa(uid, 0, 0), VAR_READWRITE); 647 648 setv(STRgid, Itoa(gid, 0, 0), VAR_READWRITE); 649 650 cln = getenv("LOGNAME"); 651 cus = getenv("USER"); 652 if (cus != NULL) 653 setv(STRuser, quote(SAVE(cus)), VAR_READWRITE); 654 else if (cln != NULL) 655 setv(STRuser, quote(SAVE(cln)), VAR_READWRITE); 656 else if ((pw = xgetpwuid(uid)) == NULL) 657 setcopy(STRuser, STRunknown, VAR_READWRITE); 658 else 659 setcopy(STRuser, str2short(pw->pw_name), VAR_READWRITE); 660 if (cln == NULL) 661 tsetenv(STRLOGNAME, varval(STRuser)); 662 if (cus == NULL) 663 tsetenv(STRKUSER, varval(STRuser)); 664 665 cgr = getenv("GROUP"); 666 if (cgr != NULL) 667 setv(STRgroup, quote(SAVE(cgr)), VAR_READWRITE); 668 else if ((gr = xgetgrgid(gid)) == NULL) 669 setcopy(STRgroup, STRunknown, VAR_READWRITE); 670 else 671 setcopy(STRgroup, str2short(gr->gr_name), VAR_READWRITE); 672 if (cgr == NULL) 673 tsetenv(STRKGROUP, varval(STRgroup)); 674 } 675 676 /* 677 * HOST may be wrong, since rexd transports the entire environment on sun 678 * 3.x Just set it again 679 */ 680 { 681 char cbuff[MAXHOSTNAMELEN]; 682 683 if (gethostname(cbuff, sizeof(cbuff)) >= 0) { 684 cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */ 685 tsetenv(STRHOST, str2short(cbuff)); 686 } 687 else 688 tsetenv(STRHOST, STRunknown); 689 } 690 691 692 #ifdef REMOTEHOST 693 /* 694 * Try to determine the remote host we were logged in from. 695 */ 696 remotehost(); 697 #endif /* REMOTEHOST */ 698 699 #ifdef apollo 700 if ((tcp = getenv("SYSTYPE")) == NULL) 701 tcp = "bsd4.3"; 702 tsetenv(STRSYSTYPE, quote(str2short(tcp))); 703 #endif /* apollo */ 704 705 /* 706 * set editing on by default, unless running under Emacs as an inferior 707 * shell. 708 * We try to do this intelligently. If $TERM is available, then it 709 * should determine if we should edit or not. $TERM is preserved 710 * across rlogin sessions, so we will not get confused if we rlogin 711 * under an emacs shell. Another advantage is that if we run an 712 * xterm under an emacs shell, then the $TERM will be set to 713 * xterm, so we are going to want to edit. Unfortunately emacs 714 * does not restore all the tty modes, so xterm is not very well 715 * set up. But this is not the shell's fault. 716 * Also don't edit if $TERM == wm, for when we're running under an ATK app. 717 * Finally, emacs compiled under terminfo, sets the terminal to dumb, 718 * so disable editing for that too. 719 * 720 * Unfortunately, in some cases the initial $TERM setting is "unknown", 721 * "dumb", or "network" which is then changed in the user's startup files. 722 * We fix this by setting noediting here if $TERM is unknown/dumb and 723 * if noediting is set, we switch on editing if $TERM is changed. 724 */ 725 if ((tcp = getenv("TERM")) != NULL) { 726 setv(STRterm, quote(SAVE(tcp)), VAR_READWRITE); 727 noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 || 728 strcmp(tcp, "network") == 0; 729 editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 && 730 !noediting; 731 } 732 else { 733 noediting = 0; 734 editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0); 735 } 736 737 /* 738 * The 'edit' variable is either set or unset. It doesn't 739 * need a value. Making it 'emacs' might be confusing. 740 */ 741 if (editing) 742 setNS(STRedit); 743 744 745 /* 746 * still more mutability: make the complete routine automatically add the 747 * suffix of file names... 748 */ 749 setNS(STRaddsuffix); 750 751 /* 752 * Compatibility with tcsh >= 6.12 by default 753 */ 754 setNS(STRcsubstnonl); 755 756 /* 757 * Random default kill ring size 758 */ 759 setcopy(STRkillring, str2short("30"), VAR_READWRITE); 760 761 /* 762 * Re-initialize path if set in environment 763 */ 764 if ((tcp = getenv("PATH")) == NULL) 765 #ifdef _PATH_DEFPATH 766 importpath(str2short(_PATH_DEFPATH)); 767 #else /* !_PATH_DEFPATH */ 768 setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE); 769 #endif /* _PATH_DEFPATH */ 770 else 771 /* Importpath() allocates memory for the path, and the 772 * returned pointer from SAVE() was discarded, so 773 * this was a memory leak.. (sg) 774 * 775 * importpath(SAVE(tcp)); 776 */ 777 importpath(str2short(tcp)); 778 779 780 { 781 /* If the SHELL environment variable ends with "tcsh", set 782 * STRshell to the same path. This is to facilitate using 783 * the executable in environments where the compiled-in 784 * default isn't appropriate (sg). 785 */ 786 787 size_t sh_len = 0; 788 789 if ((tcp = getenv("SHELL")) != NULL) { 790 sh_len = strlen(tcp); 791 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) || 792 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0)) 793 setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE); 794 else 795 sh_len = 0; 796 } 797 if (sh_len == 0) 798 setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE); 799 } 800 801 #ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */ 802 if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL) 803 tcp = "SHELL"; 804 tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp))); 805 #endif /* _OSD_POSIX */ 806 807 #ifdef COLOR_LS_F 808 if ((tcp = getenv("LS_COLORS")) != NULL) 809 parseLS_COLORS(str2short(tcp)); 810 if ((tcp = getenv("LSCOLORS")) != NULL) 811 parseLSCOLORS(str2short(tcp)); 812 #endif /* COLOR_LS_F */ 813 814 mainpid = getpid(); 815 doldol = putn((tcsh_number_t)mainpid); /* For $$ */ 816 #ifdef WINNT_NATIVE 817 { 818 char *tmp; 819 Char *tmp2; 820 if ((tmp = getenv("TMP")) != NULL) { 821 tmp = xasprintf("%s/%s", tmp, "sh"); 822 tmp2 = SAVE(tmp); 823 xfree(tmp); 824 } 825 else { 826 tmp2 = SAVE(""); 827 } 828 shtemp = Strspl(tmp2, doldol); /* For << */ 829 xfree(tmp2); 830 } 831 #else /* !WINNT_NATIVE */ 832 #ifdef HAVE_MKSTEMP 833 { 834 const char *tmpdir = getenv ("TMPDIR"); 835 if (!tmpdir) 836 tmpdir = "/tmp"; 837 shtemp = Strspl(SAVE(tmpdir), SAVE("/sh" TMP_TEMPLATE)); /* For << */ 838 } 839 #else /* !HAVE_MKSTEMP */ 840 shtemp = Strspl(STRtmpsh, doldol); /* For << */ 841 #endif /* HAVE_MKSTEMP */ 842 #endif /* WINNT_NATIVE */ 843 844 /* 845 * Record the interrupt states from the parent process. If the parent is 846 * non-interruptible our hand must be forced or we (and our children) won't 847 * be either. Our children inherit termination from our parent. We catch it 848 * only if we are the login shell. 849 */ 850 sigaction(SIGINT, NULL, &parintr); 851 sigaction(SIGTERM, NULL, &parterm); 852 853 854 #ifdef TCF 855 /* Enable process migration on ourselves and our progeny */ 856 (void) signal(SIGMIGRATE, SIG_DFL); 857 #endif /* TCF */ 858 859 /* 860 * dspkanji/dspmbyte autosetting 861 */ 862 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */ 863 #if defined(DSPMBYTE) 864 #if defined(NLS) && defined(LC_CTYPE) 865 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR)) 866 #else 867 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) 868 #endif 869 { 870 autoset_dspmbyte(str2short(tcp)); 871 } 872 #if defined(WINNT_NATIVE) 873 else if (!adrof(CHECK_MBYTEVAR)) 874 nt_autoset_dspmbyte(); 875 #endif /* WINNT_NATIVE */ 876 #endif 877 #if defined(AUTOSET_KANJI) 878 # if defined(NLS) && defined(LC_CTYPE) 879 if (setlocale(LC_CTYPE, NULL) != NULL || getenv("LANG") != NULL) 880 # else 881 if (getenv("LANG") != NULL) 882 # endif 883 autoset_kanji(); 884 #endif /* AUTOSET_KANJI */ 885 fix_version(); /* publish the shell version */ 886 887 if (argc > 1 && strcmp(argv[1], "--version") == 0) { 888 xprintf("%S\n", varval(STRversion)); 889 xexit(0); 890 } 891 if (argc > 1 && strcmp(argv[1], "--help") == 0) { 892 xprintf("%S\n\n", varval(STRversion)); 893 xprintf("%s", CGETS(11, 8, HELP_STRING)); 894 xexit(0); 895 } 896 /* 897 * Process the arguments. 898 * 899 * Note that processing of -v/-x is actually delayed till after script 900 * processing. 901 * 902 * We set the first character of our name to be '-' if we are a shell 903 * running interruptible commands. Many programs which examine ps'es 904 * use this to filter such shells out. 905 */ 906 argc--, tempv++; 907 while (argc > 0 && (tcp = tempv[0])[0] == '-' && 908 *++tcp != '\0' && !batch) { 909 do 910 switch (*tcp++) { 911 912 case 0: /* - Interruptible, no prompt */ 913 prompt = 0; 914 setintr = 1; 915 nofile = 1; 916 break; 917 918 case 'b': /* -b Next arg is input file */ 919 batch = 1; 920 break; 921 922 case 'c': /* -c Command input from arg */ 923 if (argc == 1) 924 xexit(0); 925 argc--, tempv++; 926 #ifdef M_XENIX 927 /* Xenix Vi bug: 928 it relies on a 7 bit environment (/bin/sh), so it 929 pass ascii arguments with the 8th bit set */ 930 if (!strcmp(argv[0], "sh")) 931 { 932 char *p; 933 934 for (p = tempv[0]; *p; ++p) 935 *p &= ASCII; 936 } 937 #endif 938 targinp = tempv[0]; 939 prompt = 0; 940 nofile = 1; 941 break; 942 case 'd': /* -d Load directory stack from file */ 943 rdirs = 1; 944 break; 945 946 #ifdef apollo 947 case 'D': /* -D Define environment variable */ 948 { 949 Char *dp; 950 951 cp = str2short(tcp); 952 if (dp = Strchr(cp, '=')) { 953 *dp++ = '\0'; 954 tsetenv(cp, dp); 955 } 956 else 957 tsetenv(cp, STRNULL); 958 } 959 *tcp = '\0'; /* done with this argument */ 960 break; 961 #endif /* apollo */ 962 963 case 'e': /* -e Exit on any error */ 964 exiterr = 1; 965 break; 966 967 case 'f': /* -f Fast start */ 968 fast = 1; 969 break; 970 971 case 'i': /* -i Interactive, even if !intty */ 972 intact = 1; 973 nofile = 1; 974 break; 975 976 case 'm': /* -m read .cshrc (from su) */ 977 mflag = 1; 978 break; 979 980 case 'n': /* -n Don't execute */ 981 noexec = 1; 982 break; 983 984 case 'q': /* -q (Undoc'd) ... die on quit */ 985 quitit = 1; 986 break; 987 988 case 's': /* -s Read from std input */ 989 nofile = 1; 990 break; 991 992 case 't': /* -t Read one line from input */ 993 onelflg = 2; 994 prompt = 0; 995 nofile = 1; 996 break; 997 998 case 'v': /* -v Echo hist expanded input */ 999 nverbose = 1; /* ... later */ 1000 break; 1001 1002 case 'x': /* -x Echo just before execution */ 1003 nexececho = 1; /* ... later */ 1004 break; 1005 1006 case 'V': /* -V Echo hist expanded input */ 1007 setNS(STRverbose); /* NOW! */ 1008 break; 1009 1010 case 'X': /* -X Echo just before execution */ 1011 setNS(STRecho); /* NOW! */ 1012 break; 1013 1014 case 'F': 1015 /* 1016 * This will cause children to be created using fork instead of 1017 * vfork. 1018 */ 1019 use_fork = 1; 1020 break; 1021 1022 case ' ': 1023 case '\t': 1024 case '\r': 1025 case '\n': 1026 /* 1027 * for O/S's that don't do the argument parsing right in 1028 * "#!/foo -f " scripts 1029 */ 1030 break; 1031 1032 default: /* Unknown command option */ 1033 exiterr = 1; 1034 stderror(ERR_TCSHUSAGE, tcp-1, progname); 1035 break; 1036 1037 } while (*tcp); 1038 tempv++, argc--; 1039 } 1040 1041 if (quitit) /* With all due haste, for debugging */ 1042 (void) signal(SIGQUIT, SIG_DFL); 1043 1044 /* 1045 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining 1046 * arguments the first of them is the name of a shell file from which to 1047 * read commands. 1048 */ 1049 if (nofile == 0 && argc > 0) { 1050 nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE); 1051 if (nofile < 0) { 1052 child = 1; /* So this ... */ 1053 /* ... doesn't return */ 1054 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 1055 } 1056 xfree(ffile); 1057 dolzero = 1; 1058 ffile = SAVE(tempv[0]); 1059 /* 1060 * Replace FSHIN. Handle /dev/std{in,out,err} specially 1061 * since once they are closed we cannot open them again. 1062 * In that case we use our own saved descriptors 1063 */ 1064 if ((SHIN = dmove(nofile, FSHIN)) < 0) 1065 switch(nofile) { 1066 case 0: 1067 SHIN = FSHIN; 1068 break; 1069 case 1: 1070 SHIN = FSHOUT; 1071 break; 1072 case 2: 1073 SHIN = FSHDIAG; 1074 break; 1075 default: 1076 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 1077 break; 1078 } 1079 (void) close_on_exec(SHIN, 1); 1080 prompt = 0; 1081 /* argc not used any more */ tempv++; 1082 } 1083 1084 /* 1085 * Call to closem() used to be part of initdesc(). Now called below where 1086 * the script name argument has become stdin. Kernel may have used a file 1087 * descriptor to hold the name of the script (setuid case) and this name 1088 * mustn't be lost by closing the fd too soon. 1089 */ 1090 closem(); 1091 1092 /* 1093 * Consider input a tty if it really is or we are interactive. but not for 1094 * editing (christos) 1095 */ 1096 if (!(intty = isatty(SHIN))) { 1097 if (adrof(STRedit)) 1098 unsetv(STRedit); 1099 editing = 0; 1100 } 1101 intty |= intact; 1102 #ifndef convex 1103 if (intty || (intact && isatty(SHOUT))) { 1104 if (!batch && (uid != euid || gid != egid)) { 1105 errno = EACCES; 1106 child = 1; /* So this ... */ 1107 /* ... doesn't return */ 1108 stderror(ERR_SYSTEM, progname, strerror(errno)); 1109 } 1110 } 1111 #endif /* convex */ 1112 isoutatty = isatty(SHOUT); 1113 isdiagatty = isatty(SHDIAG); 1114 /* 1115 * Decide whether we should play with signals or not. If we are explicitly 1116 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the 1117 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx") 1118 * Note that in only the login shell is it likely that parent may have set 1119 * signals to be ignored 1120 */ 1121 if (loginsh || intact || (intty && isatty(SHOUT))) 1122 setintr = 1; 1123 settell(); 1124 /* 1125 * Save the remaining arguments in argv. 1126 */ 1127 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE); 1128 1129 /* 1130 * Set up the prompt. 1131 */ 1132 if (prompt) { 1133 setcopy(STRprompt, STRdefprompt, VAR_READWRITE); 1134 /* that's a meta-questionmark */ 1135 setcopy(STRprompt2, STRmquestion, VAR_READWRITE); 1136 setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE); 1137 } 1138 1139 /* 1140 * If we are an interactive shell, then start fiddling with the signals; 1141 * this is a tricky game. 1142 */ 1143 shpgrp = mygetpgrp(); 1144 opgrp = tpgrp = -1; 1145 if (setintr) { 1146 struct sigaction osig; 1147 1148 **argv = '-'; 1149 if (!quitit) /* Wary! */ 1150 (void) signal(SIGQUIT, SIG_IGN); 1151 pintr_disabled = 1; 1152 sigset_interrupting(SIGINT, queue_pintr); 1153 (void) signal(SIGTERM, SIG_IGN); 1154 1155 /* 1156 * No reason I can see not to save history on all these events.. 1157 * Most usual occurrence is in a window system, where we're not a login 1158 * shell, but might as well be... (sg) 1159 * But there might be races when lots of shells exit together... 1160 * [this is also incompatible]. 1161 * We have to be mre careful here. If the parent wants to 1162 * ignore the signals then we leave them untouched... 1163 * We also only setup the handlers for shells that are trully 1164 * interactive. 1165 */ 1166 sigaction(SIGHUP, NULL, &osig); 1167 if (loginsh || osig.sa_handler != SIG_IGN) 1168 /* exit processing on HUP */ 1169 sigset_interrupting(SIGHUP, queue_phup); 1170 #ifdef SIGXCPU 1171 sigaction(SIGXCPU, NULL, &osig); 1172 if (loginsh || osig.sa_handler != SIG_IGN) 1173 /* exit processing on XCPU */ 1174 sigset_interrupting(SIGXCPU, queue_phup); 1175 #endif 1176 #ifdef SIGXFSZ 1177 sigaction(SIGXFSZ, NULL, &osig); 1178 if (loginsh || osig.sa_handler != SIG_IGN) 1179 /* exit processing on XFSZ */ 1180 sigset_interrupting(SIGXFSZ, queue_phup); 1181 #endif 1182 1183 if (quitit == 0 && targinp == 0) { 1184 #ifdef SIGTSTP 1185 (void) signal(SIGTSTP, SIG_IGN); 1186 #endif 1187 #ifdef SIGTTIN 1188 (void) signal(SIGTTIN, SIG_IGN); 1189 #endif 1190 #ifdef SIGTTOU 1191 (void) signal(SIGTTOU, SIG_IGN); 1192 #endif 1193 /* 1194 * Wait till in foreground, in case someone stupidly runs csh & 1195 * dont want to try to grab away the tty. 1196 */ 1197 if (isatty(FSHDIAG)) 1198 f = FSHDIAG; 1199 else if (isatty(FSHOUT)) 1200 f = FSHOUT; 1201 else if (isatty(OLDSTD)) 1202 f = OLDSTD; 1203 else 1204 f = -1; 1205 1206 #ifdef NeXT 1207 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */ 1208 if (f != -1 && shpgrp == 0) { 1209 shpgrp = getpid(); 1210 (void) setpgid(0, shpgrp); 1211 (void) tcsetpgrp(f, shpgrp); 1212 } 1213 #endif /* NeXT */ 1214 #ifdef BSDJOBS /* if we have tty job control */ 1215 if (f != -1 && grabpgrp(f, shpgrp) != -1) { 1216 /* 1217 * Thanks to Matt Day for the POSIX references, and to 1218 * Paul Close for the SGI clarification. 1219 */ 1220 if (setdisc(f) != -1) { 1221 opgrp = shpgrp; 1222 shpgrp = getpid(); 1223 tpgrp = shpgrp; 1224 if (tcsetpgrp(f, shpgrp) == -1) { 1225 /* 1226 * On hpux 7.03 this fails with EPERM. This happens on 1227 * the 800 when opgrp != shpgrp at this point. (we were 1228 * forked from a non job control shell) 1229 * POSIX 7.2.4, says we failed because the process 1230 * group specified did not belong to a process 1231 * in the same session with the tty. So we set our 1232 * process group and try again. 1233 */ 1234 if (setpgid(0, shpgrp) == -1) { 1235 xprintf("setpgid:"); 1236 goto notty; 1237 } 1238 if (tcsetpgrp(f, shpgrp) == -1) { 1239 xprintf("tcsetpgrp:"); 1240 goto notty; 1241 } 1242 } 1243 /* 1244 * We check the process group now. If it is the same, then 1245 * we don't need to set it again. On hpux 7.0 on the 300's 1246 * if we set it again it fails with EPERM. This is the 1247 * correct behavior according to POSIX 4.3.3 if the process 1248 * was a session leader . 1249 */ 1250 else if (shpgrp != mygetpgrp()) { 1251 if(setpgid(0, shpgrp) == -1) { 1252 xprintf("setpgid:"); 1253 goto notty; 1254 } 1255 } 1256 #ifdef IRIS4D 1257 /* 1258 * But on irix 3.3 we need to set it again, even if it is 1259 * the same. We do that to tell the system that we 1260 * need BSD process group compatibility. 1261 */ 1262 else 1263 (void) setpgid(0, shpgrp); 1264 #endif 1265 (void) close_on_exec(dcopy(f, FSHTTY), 1); 1266 } 1267 else 1268 tpgrp = -1; 1269 } 1270 if (tpgrp == -1) { 1271 notty: 1272 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"), 1273 strerror(errno)); 1274 xprintf("%s", 1275 CGETS(11, 2, "Thus no job control in this shell.\n")); 1276 /* 1277 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't 1278 * have access to tty, disable editing too 1279 */ 1280 if (adrof(STRedit)) 1281 unsetv(STRedit); 1282 editing = 0; 1283 } 1284 #else /* BSDJOBS */ /* don't have job control, so frotz it */ 1285 tpgrp = -1; 1286 #endif /* BSDJOBS */ 1287 } 1288 } 1289 if (setintr == 0 && parintr.sa_handler == SIG_DFL) 1290 setintr = 1; 1291 1292 /* 1293 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the 1294 * handler is installed with signal(2) or sigset(2). sigaction(2) must 1295 * be used instead. 1296 * 1297 * David Dawes (dawes@physics.su.oz.au) Sept 1991 1298 */ 1299 sigset_interrupting(SIGCHLD, queue_pchild); 1300 1301 if (intty && !targinp) 1302 (void) ed_Setup(editing);/* Get the tty state, and set defaults */ 1303 /* Only alter the tty state if editing */ 1304 1305 /* 1306 * Set an exit here in case of an interrupt or error reading the shell 1307 * start-up scripts. 1308 */ 1309 osetintr = setintr; 1310 oparintr = parintr; 1311 (void)cleanup_push_mark(); /* There is no outer handler */ 1312 if (setexit() != 0) /* PWP */ 1313 reenter = 1; 1314 else 1315 reenter = 0; 1316 exitset++; 1317 haderr = 0; /* In case second time through */ 1318 if (!fast && reenter == 0) { 1319 /* Will have varval(STRhome) here because set fast if don't */ 1320 { 1321 pintr_disabled++; 1322 cleanup_push(&pintr_disabled, disabled_cleanup); 1323 setintr = 0;/*FIXRESET:cleanup*/ 1324 /* onintr in /etc/ files has no effect */ 1325 parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/ 1326 #ifdef LOGINFIRST 1327 #ifdef _PATH_DOTLOGIN 1328 if (loginsh) 1329 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1330 #endif 1331 #endif 1332 1333 #ifdef _PATH_DOTCSHRC 1334 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL); 1335 #endif 1336 if (!targinp && !onelflg && !havhash) 1337 dohash(NULL,NULL); 1338 #ifndef LOGINFIRST 1339 #ifdef _PATH_DOTLOGIN 1340 if (loginsh) 1341 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1342 #endif 1343 #endif 1344 cleanup_until(&pintr_disabled); 1345 setintr = osetintr; 1346 parintr = oparintr; 1347 } 1348 #ifdef LOGINFIRST 1349 if (loginsh) 1350 (void) srccat(varval(STRhome), STRsldotlogin); 1351 #endif 1352 /* upward compat. */ 1353 if (!srccat(varval(STRhome), STRsldottcshrc)) 1354 (void) srccat(varval(STRhome), STRsldotcshrc); 1355 1356 if (!targinp && !onelflg && !havhash) 1357 dohash(NULL,NULL); 1358 1359 /* 1360 * Source history before .login so that it is available in .login 1361 */ 1362 loadhist(NULL, 0); 1363 #ifndef LOGINFIRST 1364 if (loginsh) 1365 (void) srccat(varval(STRhome), STRsldotlogin); 1366 #endif 1367 if (loginsh || rdirs) 1368 loaddirs(NULL); 1369 } 1370 /* Reset interrupt flag */ 1371 setintr = osetintr; 1372 parintr = oparintr; 1373 exitset--; 1374 1375 /* Initing AFTER .cshrc is the Right Way */ 1376 if (intty && !targinp) { /* PWP setup stuff */ 1377 ed_Init(); /* init the new line editor */ 1378 #ifdef SIG_WINDOW 1379 check_window_size(1); /* mung environment */ 1380 #endif /* SIG_WINDOW */ 1381 } 1382 1383 /* 1384 * Now are ready for the -v and -x flags 1385 */ 1386 if (nverbose) 1387 setNS(STRverbose); 1388 if (nexececho) 1389 setNS(STRecho); 1390 1391 1392 if (targinp) { 1393 arginp = SAVE(targinp); 1394 /* 1395 * we put the command into a variable 1396 */ 1397 if (arginp != NULL) 1398 setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE); 1399 1400 /* 1401 * * Give an error on -c arguments that end in * backslash to 1402 * ensure that you don't make * nonportable csh scripts. 1403 */ 1404 { 1405 int count; 1406 1407 cp = Strend(arginp); 1408 count = 0; 1409 while (cp > arginp && *--cp == '\\') 1410 ++count; 1411 if ((count & 1) != 0) { 1412 exiterr = 1; 1413 stderror(ERR_ARGC); 1414 } 1415 } 1416 } 1417 /* 1418 * All the rest of the world is inside this call. The argument to process 1419 * indicates whether it should catch "error unwinds". Thus if we are a 1420 * interactive shell our call here will never return by being blown past on 1421 * an error. 1422 */ 1423 process(setintr); 1424 1425 /* 1426 * Mop-up. 1427 */ 1428 /* Take care of these (especially HUP) here instead of inside flush. */ 1429 handle_pending_signals(); 1430 if (intty) { 1431 if (loginsh) { 1432 xprintf("logout\n"); 1433 xclose(SHIN); 1434 child = 1; 1435 #ifdef TESLA 1436 do_logout = 1; 1437 #endif /* TESLA */ 1438 goodbye(NULL, NULL); 1439 } 1440 else { 1441 xprintf("exit\n"); 1442 } 1443 } 1444 record(); 1445 exitstat(); 1446 return (0); 1447 } 1448 1449 void 1450 untty(void) 1451 { 1452 #ifdef BSDJOBS 1453 if (tpgrp > 0 && opgrp != shpgrp) { 1454 (void) setpgid(0, opgrp); 1455 (void) tcsetpgrp(FSHTTY, opgrp); 1456 (void) resetdisc(FSHTTY); 1457 } 1458 #endif /* BSDJOBS */ 1459 } 1460 1461 void 1462 importpath(Char *cp) 1463 { 1464 size_t i = 0; 1465 Char *dp; 1466 Char **pv; 1467 int c; 1468 1469 for (dp = cp; *dp; dp++) 1470 if (*dp == PATHSEP) 1471 i++; 1472 /* 1473 * i+2 where i is the number of colons in the path. There are i+1 1474 * directories in the path plus we need room for a zero terminator. 1475 */ 1476 pv = xcalloc(i + 2, sizeof(Char *)); 1477 dp = cp; 1478 i = 0; 1479 if (*dp) 1480 for (;;) { 1481 if ((c = *dp) == PATHSEP || c == 0) { 1482 *dp = 0; 1483 pv[i++] = Strsave(*cp ? cp : STRdot); 1484 if (c) { 1485 cp = dp + 1; 1486 *dp = PATHSEP; 1487 } 1488 else 1489 break; 1490 } 1491 #ifdef WINNT_NATIVE 1492 else if (*dp == '\\') 1493 *dp = '/'; 1494 #endif /* WINNT_NATIVE */ 1495 dp++; 1496 } 1497 pv[i] = 0; 1498 cleanup_push(pv, blk_cleanup); 1499 setq(STRpath, pv, &shvhed, VAR_READWRITE); 1500 cleanup_ignore(pv); 1501 cleanup_until(pv); 1502 } 1503 1504 /* 1505 * Source to the file which is the catenation of the argument names. 1506 */ 1507 static int 1508 srccat(Char *cp, Char *dp) 1509 { 1510 if (cp[0] == '/' && cp[1] == '\0') 1511 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL); 1512 else { 1513 Char *ep; 1514 char *ptr; 1515 int rv; 1516 1517 #ifdef WINNT_NATIVE 1518 ep = Strend(cp); 1519 if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */ 1520 dp++; 1521 #endif /* WINNT_NATIVE */ 1522 1523 ep = Strspl(cp, dp); 1524 cleanup_push(ep, xfree); 1525 ptr = short2str(ep); 1526 1527 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL); 1528 cleanup_until(ep); 1529 return rv; 1530 } 1531 } 1532 1533 /* 1534 * Source to a file putting the file descriptor in a safe place (> 2). 1535 */ 1536 #ifndef WINNT_NATIVE 1537 static int 1538 #else 1539 int 1540 #endif /*WINNT_NATIVE*/ 1541 srcfile(const char *f, int onlyown, int flag, Char **av) 1542 { 1543 int unit; 1544 1545 if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1) 1546 return 0; 1547 cleanup_push(&unit, open_cleanup); 1548 unit = dmove(unit, -1); 1549 cleanup_ignore(&unit); 1550 cleanup_until(&unit); 1551 1552 (void) close_on_exec(unit, 1); 1553 srcunit(unit, onlyown, flag, av); 1554 return 1; 1555 } 1556 1557 1558 /* 1559 * Save the shell state, and establish new argument vector, and new input 1560 * fd. 1561 */ 1562 static void 1563 st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av) 1564 { 1565 st->insource = insource; 1566 st->SHIN = SHIN; 1567 /* Want to preserve the meaning of "source file >output". 1568 * Save old descriptors, move new 0,1,2 to safe places and assign 1569 * them to SH* and let process() redo 0,1,2 from them. 1570 * 1571 * The macro returns true if d1 and d2 are good and they point to 1572 * different things. If you don't avoid saving duplicate 1573 * descriptors, you really limit the depth of "source" recursion 1574 * you can do because of all the open file descriptors. -IAN! 1575 */ 1576 #define NEED_SAVE_FD(d1,d2) \ 1577 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \ 1578 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) ) 1579 1580 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */ 1581 if (didfds) { 1582 struct stat s1, s2; 1583 if (NEED_SAVE_FD(0,OLDSTD)) { 1584 st->OLDSTD = OLDSTD; 1585 OLDSTD = dmove(0, -1); 1586 (void)close_on_exec(OLDSTD, 1); 1587 } 1588 if (NEED_SAVE_FD(1,SHOUT)) { 1589 st->SHOUT = SHOUT; 1590 SHOUT = dmove(1, -1); 1591 (void)close_on_exec(SHOUT, 1); 1592 } 1593 if (NEED_SAVE_FD(2,SHDIAG)) { 1594 st->SHDIAG = SHDIAG; 1595 SHDIAG = dmove(2, -1); 1596 (void)close_on_exec(SHDIAG, 1); 1597 } 1598 donefds(); 1599 } 1600 1601 st->intty = intty; 1602 st->whyles = whyles; 1603 st->gointr = gointr; 1604 st->arginp = arginp; 1605 st->evalp = evalp; 1606 st->evalvec = evalvec; 1607 st->alvecp = alvecp; 1608 st->alvec = alvec; 1609 st->onelflg = onelflg; 1610 st->enterhist = enterhist; 1611 st->justpr = justpr; 1612 if (hflg) 1613 st->HIST = HIST; 1614 else 1615 st->HIST = '\0'; 1616 st->cantell = cantell; 1617 cpybin(st->B, B); 1618 1619 /* 1620 * we can now pass arguments to source. 1621 * For compatibility we do that only if arguments were really 1622 * passed, otherwise we keep the old, global $argv like before. 1623 */ 1624 if (av != NULL && *av != NULL) { 1625 struct varent *vp; 1626 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL) 1627 st->argv = saveblk(vp->vec); 1628 else 1629 st->argv = NULL; 1630 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE); 1631 } 1632 else 1633 st->argv = NULL; 1634 st->av = av; 1635 1636 SHIN = unit; /* Do this first */ 1637 1638 /* Establish new input arena */ 1639 { 1640 fbuf = NULL; 1641 fseekp = feobp = fblocks = 0; 1642 settell(); 1643 } 1644 1645 arginp = 0; 1646 onelflg = 0; 1647 intty = isatty(SHIN); 1648 whyles = 0; 1649 gointr = 0; 1650 evalvec = 0; 1651 evalp = 0; 1652 alvec = al; 1653 alvecp = 0; 1654 enterhist = hflg; 1655 if (enterhist) 1656 HIST = '\0'; 1657 insource = 1; 1658 } 1659 1660 1661 /* 1662 * Restore the shell to a saved state 1663 */ 1664 static void 1665 st_restore(void *xst) 1666 { 1667 struct saved_state *st; 1668 1669 st = xst; 1670 if (st->SHIN == -1) 1671 return; 1672 1673 /* Reset input arena */ 1674 { 1675 int i; 1676 Char** nfbuf = fbuf; 1677 int nfblocks = fblocks; 1678 1679 fblocks = 0; 1680 fbuf = NULL; 1681 for (i = 0; i < nfblocks; i++) 1682 xfree(nfbuf[i]); 1683 xfree(nfbuf); 1684 } 1685 cpybin(B, st->B); 1686 1687 xclose(SHIN); 1688 1689 insource = st->insource; 1690 SHIN = st->SHIN; 1691 if (st->OLDSTD != -1) 1692 xclose(OLDSTD), OLDSTD = st->OLDSTD; 1693 if (st->SHOUT != -1) 1694 xclose(SHOUT), SHOUT = st->SHOUT; 1695 if (st->SHDIAG != -1) 1696 xclose(SHDIAG), SHDIAG = st->SHDIAG; 1697 arginp = st->arginp; 1698 onelflg = st->onelflg; 1699 evalp = st->evalp; 1700 evalvec = st->evalvec; 1701 alvecp = st->alvecp; 1702 alvec = st->alvec; 1703 intty = st->intty; 1704 whyles = st->whyles; 1705 gointr = st->gointr; 1706 if (st->HIST != '\0') 1707 HIST = st->HIST; 1708 enterhist = st->enterhist; 1709 cantell = st->cantell; 1710 justpr = st->justpr; 1711 1712 if (st->argv != NULL) 1713 setq(STRargv, st->argv, &shvhed, VAR_READWRITE); 1714 else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL) 1715 unsetv(STRargv); 1716 } 1717 1718 /* 1719 * Source to a unit. If onlyown it must be our file or our group or 1720 * we don't chance it. This occurs on ".cshrc"s and the like. 1721 */ 1722 static void 1723 srcunit(int unit, int onlyown, int hflg, Char **av) 1724 { 1725 struct saved_state st; 1726 1727 st.SHIN = -1; /* st_restore checks this */ 1728 1729 if (unit < 0) 1730 return; 1731 1732 if (onlyown) { 1733 struct stat stb; 1734 1735 if (fstat(unit, &stb) < 0) { 1736 xclose(unit); 1737 return; 1738 } 1739 } 1740 1741 /* Does nothing before st_save() because st.SHIN == -1 */ 1742 cleanup_push(&st, st_restore); 1743 if (setintr) { 1744 pintr_disabled++; 1745 cleanup_push(&pintr_disabled, disabled_cleanup); 1746 } 1747 1748 /* Save the current state and move us to a new state */ 1749 st_save(&st, unit, hflg, NULL, av); 1750 1751 /* 1752 * Now if we are allowing commands to be interrupted, we let ourselves be 1753 * interrupted. 1754 */ 1755 if (setintr) { 1756 cleanup_until(&pintr_disabled); 1757 pintr_disabled++; 1758 cleanup_push(&pintr_disabled, disabled_cleanup); 1759 } 1760 1761 process(0); /* 0 -> blow away on errors */ 1762 1763 /* Restore the old state */ 1764 cleanup_until(&st); 1765 } 1766 1767 1768 /*ARGSUSED*/ 1769 void 1770 goodbye(Char **v, struct command *c) 1771 { 1772 USE(v); 1773 USE(c); 1774 record(); 1775 1776 if (loginsh) { 1777 size_t omark; 1778 sigset_t set; 1779 1780 sigemptyset(&set); 1781 signal(SIGQUIT, SIG_IGN); 1782 sigaddset(&set, SIGQUIT); 1783 sigprocmask(SIG_UNBLOCK, &set, NULL); 1784 signal(SIGINT, SIG_IGN); 1785 sigaddset(&set, SIGINT); 1786 signal(SIGTERM, SIG_IGN); 1787 sigaddset(&set, SIGTERM); 1788 signal(SIGHUP, SIG_IGN); 1789 sigaddset(&set, SIGHUP); 1790 sigprocmask(SIG_UNBLOCK, &set, NULL); 1791 phup_disabled = 1; 1792 setintr = 0; /* No interrupts after "logout" */ 1793 /* Trap errors inside .logout */ 1794 omark = cleanup_push_mark(); 1795 if (setexit() == 0) { 1796 if (!(adrof(STRlogout))) 1797 setcopy(STRlogout, STRnormal, VAR_READWRITE); 1798 #ifdef _PATH_DOTLOGOUT 1799 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1800 #endif 1801 if (adrof(STRhome)) 1802 (void) srccat(varval(STRhome), STRsldtlogout); 1803 #ifdef TESLA 1804 do_logout = 1; 1805 #endif /* TESLA */ 1806 } 1807 cleanup_pop_mark(omark); 1808 } 1809 exitstat(); 1810 } 1811 1812 void 1813 exitstat(void) 1814 { 1815 #ifdef PROF 1816 _mcleanup(); 1817 #endif 1818 /* 1819 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit 1820 * directly because we poke child here. Otherwise we might continue 1821 * unwarrantedly (sic). 1822 */ 1823 child = 1; 1824 1825 xexit(getn(varval(STRstatus))); 1826 } 1827 1828 /* 1829 * in the event of a HUP we want to save the history 1830 */ 1831 void 1832 phup(void) 1833 { 1834 if (loginsh) { 1835 setcopy(STRlogout, STRhangup, VAR_READWRITE); 1836 #ifdef _PATH_DOTLOGOUT 1837 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1838 #endif 1839 if (adrof(STRhome)) 1840 (void) srccat(varval(STRhome), STRsldtlogout); 1841 } 1842 1843 record(); 1844 1845 #ifdef POSIXJOBS 1846 /* 1847 * We kill the last foreground process group. It then becomes 1848 * responsible to propagate the SIGHUP to its progeny. 1849 */ 1850 { 1851 struct process *pp, *np; 1852 1853 for (pp = proclist.p_next; pp; pp = pp->p_next) { 1854 np = pp; 1855 /* 1856 * Find if this job is in the foreground. It could be that 1857 * the process leader has exited and the foreground flag 1858 * is cleared for it. 1859 */ 1860 do 1861 /* 1862 * If a process is in the foreground we try to kill 1863 * it's process group. If we succeed, then the 1864 * whole job is gone. Otherwise we keep going... 1865 * But avoid sending HUP to the shell again. 1866 */ 1867 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) { 1868 np->p_flags &= ~PHUP; 1869 if (killpg(np->p_jobid, SIGHUP) != -1) { 1870 /* In case the job was suspended... */ 1871 #ifdef SIGCONT 1872 (void) killpg(np->p_jobid, SIGCONT); 1873 #endif 1874 break; 1875 } 1876 } 1877 while ((np = np->p_friends) != pp); 1878 } 1879 } 1880 #endif /* POSIXJOBS */ 1881 1882 xexit(SIGHUP); 1883 } 1884 1885 static Char *jobargv[2] = {STRjobs, 0}; 1886 1887 /* 1888 * Catch an interrupt, e.g. during lexical input. 1889 * If we are an interactive shell, we reset the interrupt catch 1890 * immediately. In any case we drain the shell output, 1891 * and finally go through the normal error mechanism, which 1892 * gets a chance to make the shell go away. 1893 */ 1894 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */ 1895 1896 void 1897 pintr(void) 1898 { 1899 just_signaled = 1; 1900 pintr1(1); 1901 } 1902 1903 void 1904 pintr1(int wantnl) 1905 { 1906 if (setintr) { 1907 if (pjobs) { 1908 pjobs = 0; 1909 xputchar('\n'); 1910 dojobs(jobargv, NULL); 1911 stderror(ERR_NAME | ERR_INTR); 1912 } 1913 } 1914 /* MH - handle interrupted completions specially */ 1915 { 1916 if (InsideCompletion) 1917 stderror(ERR_SILENT); 1918 } 1919 /* JV - Make sure we shut off inputl */ 1920 { 1921 (void) Cookedmode(); 1922 GettingInput = 0; 1923 if (evalvec) 1924 doneinp = 1; 1925 } 1926 drainoline(); 1927 #ifdef HAVE_GETPWENT 1928 (void) endpwent(); 1929 #endif 1930 1931 /* 1932 * If we have an active "onintr" then we search for the label. Note that if 1933 * one does "onintr -" then we shan't be interruptible so we needn't worry 1934 * about that here. 1935 */ 1936 if (gointr) { 1937 gotolab(gointr); 1938 reset(); 1939 } 1940 else if (intty && wantnl) { 1941 if (editing) { 1942 /* 1943 * If we are editing a multi-line input command, and move to 1944 * the beginning of the line, we don't want to trash it when 1945 * we hit ^C 1946 */ 1947 PastBottom(); 1948 ClearLines(); 1949 ClearDisp(); 1950 } 1951 else { 1952 /* xputchar('\n'); *//* Some like this, others don't */ 1953 (void) putraw('\r'); 1954 (void) putraw('\n'); 1955 } 1956 } 1957 stderror(ERR_SILENT); 1958 } 1959 1960 /* 1961 * Process is the main driving routine for the shell. 1962 * It runs all command processing, except for those within { ... } 1963 * in expressions (which is run by a routine evalav in sh.exp.c which 1964 * is a stripped down process), and `...` evaluation which is run 1965 * also by a subset of this code in sh.glob.c in the routine backeval. 1966 * 1967 * The code here is a little strange because part of it is interruptible 1968 * and hence freeing of structures appears to occur when none is necessary 1969 * if this is ignored. 1970 * 1971 * Note that if catch is not set then we will unwind on any error. 1972 * If an end-of-file occurs, we return. 1973 */ 1974 void 1975 process(int catch) 1976 { 1977 jmp_buf_t osetexit; 1978 /* PWP: This might get nuked by longjmp so don't make it a register var */ 1979 size_t omark; 1980 volatile int didexitset = 0; 1981 1982 getexit(osetexit); 1983 omark = cleanup_push_mark(); 1984 for (;;) { 1985 struct command *t; 1986 int hadhist, old_pintr_disabled; 1987 1988 (void)setexit(); 1989 if (didexitset == 0) { 1990 exitset++; 1991 didexitset++; 1992 } 1993 pendjob(); 1994 1995 justpr = enterhist; /* execute if not entering history */ 1996 1997 if (haderr) { 1998 if (!catch) { 1999 /* unwind */ 2000 doneinp = 0; 2001 cleanup_pop_mark(omark); 2002 resexit(osetexit); 2003 reset(); 2004 } 2005 haderr = 0; 2006 /* 2007 * Every error is eventually caught here or the shell dies. It is 2008 * at this point that we clean up any left-over open files, by 2009 * closing all but a fixed number of pre-defined files. Thus 2010 * routines don't have to worry about leaving files open due to 2011 * deeper errors... they will get closed here. 2012 */ 2013 closem(); 2014 continue; 2015 } 2016 if (doneinp) { 2017 doneinp = 0; 2018 break; 2019 } 2020 if (chkstop) 2021 chkstop--; 2022 if (neednote) 2023 pnote(); 2024 if (intty && prompt && evalvec == 0) { 2025 just_signaled = 0; 2026 mailchk(); 2027 /* 2028 * Watch for logins/logouts. Next is scheduled commands stored 2029 * previously using "sched." Then execute periodic commands. 2030 * Following that, the prompt precmd is run. 2031 */ 2032 #ifndef HAVENOUTMP 2033 watch_login(0); 2034 #endif /* !HAVENOUTMP */ 2035 sched_run(); 2036 period_cmd(); 2037 precmd(); 2038 /* 2039 * If we are at the end of the input buffer then we are going to 2040 * read fresh stuff. Otherwise, we are rereading input and don't 2041 * need or want to prompt. 2042 */ 2043 if (fseekp == feobp && aret == TCSH_F_SEEK) 2044 printprompt(0, NULL); 2045 flush(); 2046 setalarm(1); 2047 } 2048 if (seterr) { 2049 xfree(seterr); 2050 seterr = NULL; 2051 } 2052 2053 /* 2054 * Interruptible during interactive reads 2055 */ 2056 if (setintr) 2057 pintr_push_enable(&old_pintr_disabled); 2058 freelex(¶ml); 2059 hadhist = lex(¶ml); 2060 if (setintr) 2061 cleanup_until(&old_pintr_disabled); 2062 cleanup_push(¶ml, lex_cleanup); 2063 2064 /* 2065 * Echo not only on VERBOSE, but also with history expansion. If there 2066 * is a lexical error then we forego history echo. 2067 * Do not echo if we're only entering history (source -h). 2068 */ 2069 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) || 2070 (!enterhist && adrof(STRverbose))) 2071 { 2072 int odidfds = didfds; 2073 haderr = 1; 2074 didfds = 0; 2075 prlex(¶ml); 2076 flush(); 2077 haderr = 0; 2078 didfds = odidfds; 2079 } 2080 (void) alarm(0); /* Autologout OFF */ 2081 alrmcatch_disabled = 1; 2082 2083 /* 2084 * Save input text on the history list if reading in old history, or it 2085 * is from the terminal at the top level and not in a loop. 2086 * 2087 * PWP: entry of items in the history list while in a while loop is done 2088 * elsewhere... 2089 */ 2090 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun)) 2091 savehist(¶ml, enterhist > 1); 2092 2093 if (Expand && seterr) 2094 Expand = 0; 2095 2096 /* 2097 * Print lexical error messages, except when sourcing history lists. 2098 */ 2099 if (!enterhist && seterr) 2100 stderror(ERR_OLD); 2101 2102 /* 2103 * If had a history command :p modifier then this is as far as we 2104 * should go 2105 */ 2106 if (justpr) 2107 goto cmd_done; 2108 2109 /* 2110 * If had a tellwhat from twenex() then do 2111 */ 2112 if (tellwhat) { 2113 (void) tellmewhat(¶ml, NULL); 2114 goto cmd_done; 2115 } 2116 2117 alias(¶ml); 2118 2119 #ifdef BSDJOBS 2120 /* 2121 * If we are interactive, try to continue jobs that we have stopped 2122 */ 2123 if (prompt) 2124 continue_jobs(¶ml); 2125 #endif /* BSDJOBS */ 2126 2127 /* 2128 * Check to see if the user typed "rm * .o" or something 2129 */ 2130 if (prompt) 2131 rmstar(¶ml); 2132 /* 2133 * Parse the words of the input into a parse tree. 2134 */ 2135 t = syntax(paraml.next, ¶ml, 0); 2136 /* 2137 * We cannot cleanup push here, because cd /blah; echo foo 2138 * would rewind t on the chdir error, and free the rest of the command 2139 */ 2140 if (seterr) { 2141 freesyn(t); 2142 stderror(ERR_OLD); 2143 } 2144 2145 postcmd(); 2146 /* 2147 * Execute the parse tree From: Michael Schroeder 2148 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp); 2149 */ 2150 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE); 2151 freesyn(t); 2152 2153 /* 2154 * Made it! 2155 */ 2156 #ifdef SIG_WINDOW 2157 if (windowchg || (catch && intty && !whyles && !tellwhat)) { 2158 (void) check_window_size(0); /* for window systems */ 2159 } 2160 #endif /* SIG_WINDOW */ 2161 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB); 2162 cmd_done: 2163 if (cleanup_reset()) 2164 cleanup_until(¶ml); 2165 else 2166 haderr = 1; 2167 } 2168 cleanup_pop_mark(omark); 2169 resexit(osetexit); 2170 exitset--; 2171 handle_pending_signals(); 2172 } 2173 2174 /*ARGSUSED*/ 2175 void 2176 dosource(Char **t, struct command *c) 2177 { 2178 Char *f; 2179 int hflg = 0; 2180 char *file; 2181 2182 USE(c); 2183 t++; 2184 if (*t && eq(*t, STRmh)) { 2185 if (*++t == NULL) 2186 stderror(ERR_NAME | ERR_HFLAG); 2187 hflg++; 2188 } 2189 else if (*t && eq(*t, STRmm)) { 2190 if (*++t == NULL) 2191 stderror(ERR_NAME | ERR_MFLAG); 2192 hflg = 2; 2193 } 2194 2195 f = globone(*t++, G_ERROR); 2196 file = strsave(short2str(f)); 2197 cleanup_push(file, xfree); 2198 xfree(f); 2199 t = glob_all_or_error(t); 2200 cleanup_push(t, blk_cleanup); 2201 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet)) 2202 stderror(ERR_SYSTEM, file, strerror(errno)); 2203 cleanup_until(file); 2204 } 2205 2206 /* 2207 * Check for mail. 2208 * If we are a login shell, then we don't want to tell 2209 * about any mail file unless its been modified 2210 * after the time we started. 2211 * This prevents us from telling the user things he already 2212 * knows, since the login program insists on saying 2213 * "You have mail." 2214 */ 2215 2216 /* 2217 * The AMS version. 2218 * This version checks if the file is a directory, and if so, 2219 * tells you the number of files in it, otherwise do the old thang. 2220 * The magic "+1" in the time calculation is to compensate for 2221 * an AFS bug where directory mtimes are set to 1 second in 2222 * the future. 2223 */ 2224 2225 static void 2226 mailchk(void) 2227 { 2228 struct varent *v; 2229 Char **vp; 2230 time_t t; 2231 int intvl, cnt; 2232 struct stat stb; 2233 int new; 2234 2235 v = adrof(STRmail); 2236 if (v == NULL || v->vec == NULL) 2237 return; 2238 (void) time(&t); 2239 vp = v->vec; 2240 cnt = blklen(vp); 2241 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL; 2242 if (intvl < 1) 2243 intvl = 1; 2244 if (chktim + intvl > t) 2245 return; 2246 for (; *vp; vp++) { 2247 char *filename = short2str(*vp); 2248 char *mboxdir = filename; 2249 2250 if (stat(filename, &stb) < 0) 2251 continue; 2252 #if defined(BSDTIMES) || defined(_SEQUENT_) 2253 new = stb.st_mtime > time0.tv_sec; 2254 #else 2255 new = stb.st_mtime > seconds0; 2256 #endif 2257 if (S_ISDIR(stb.st_mode)) { 2258 DIR *mailbox; 2259 int mailcount = 0; 2260 char *tempfilename; 2261 struct stat stc; 2262 2263 tempfilename = xasprintf("%s/new", filename); 2264 2265 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) { 2266 /* 2267 * "filename/new" exists and is a directory; you are 2268 * using Qmail. 2269 */ 2270 stb = stc; 2271 #if defined(BSDTIMES) || defined(_SEQUENT_) 2272 new = stb.st_mtime > time0.tv_sec; 2273 #else 2274 new = stb.st_mtime > seconds0; 2275 #endif 2276 mboxdir = tempfilename; 2277 } 2278 2279 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) { 2280 xfree(tempfilename); 2281 continue; 2282 } 2283 2284 mailbox = opendir(mboxdir); 2285 xfree(tempfilename); 2286 if (mailbox == NULL) 2287 continue; 2288 2289 /* skip . and .. */ 2290 if (!readdir(mailbox) || !readdir(mailbox)) { 2291 (void)closedir(mailbox); 2292 continue; 2293 } 2294 2295 while (readdir(mailbox)) 2296 mailcount++; 2297 2298 (void)closedir(mailbox); 2299 if (mailcount == 0) 2300 continue; 2301 2302 if (cnt == 1) 2303 xprintf(CGETS(11, 3, "You have %d mail messages.\n"), 2304 mailcount); 2305 else 2306 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"), 2307 mailcount, filename); 2308 } 2309 else { 2310 char *type; 2311 2312 if (stb.st_size == 0 || stb.st_atime >= stb.st_mtime || 2313 (stb.st_atime <= chktim && stb.st_mtime <= chktim) || 2314 (loginsh && !new)) 2315 continue; 2316 type = strsave(new ? CGETS(11, 6, "new ") : ""); 2317 cleanup_push(type, xfree); 2318 if (cnt == 1) 2319 xprintf(CGETS(11, 5, "You have %smail.\n"), type); 2320 else 2321 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename); 2322 cleanup_until(type); 2323 } 2324 } 2325 chktim = t; 2326 } 2327 2328 /* 2329 * Extract a home directory from the password file 2330 * The argument points to a buffer where the name of the 2331 * user whose home directory is sought is currently. 2332 * We return home directory of the user, or NULL. 2333 */ 2334 Char * 2335 gethdir(const Char *home) 2336 { 2337 Char *h; 2338 2339 /* 2340 * Is it us? 2341 */ 2342 if (*home == '\0') { 2343 if ((h = varval(STRhome)) != STRNULL) 2344 return Strsave(h); 2345 else 2346 return NULL; 2347 } 2348 2349 /* 2350 * Look in the cache 2351 */ 2352 if ((h = gettilde(home)) == NULL) 2353 return NULL; 2354 else 2355 return Strsave(h); 2356 } 2357 2358 /* 2359 * Move the initial descriptors to their eventual 2360 * resting places, closing all other units. 2361 */ 2362 void 2363 initdesc(void) 2364 { 2365 #ifdef NLS_BUGS 2366 #ifdef NLS_CATALOGS 2367 nlsclose(); 2368 #endif /* NLS_CATALOGS */ 2369 #endif /* NLS_BUGS */ 2370 2371 2372 didfds = 0; /* 0, 1, 2 aren't set up */ 2373 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1); 2374 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1); 2375 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1); 2376 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1); 2377 #ifndef CLOSE_ON_EXEC 2378 didcch = 0; /* Havent closed for child */ 2379 #endif /* CLOSE_ON_EXEC */ 2380 if (SHDIAG >= 0) 2381 isdiagatty = isatty(SHDIAG); 2382 else 2383 isdiagatty = 0; 2384 if (SHDIAG >= 0) 2385 isoutatty = isatty(SHOUT); 2386 else 2387 isoutatty = 0; 2388 #ifdef NLS_BUGS 2389 #ifdef NLS_CATALOGS 2390 nlsinit(); 2391 #endif /* NLS_CATALOGS */ 2392 #endif /* NLS_BUGS */ 2393 } 2394 2395 2396 void 2397 #ifdef PROF 2398 done(int i) 2399 #else 2400 xexit(int i) 2401 #endif 2402 { 2403 #ifdef TESLA 2404 if (loginsh && do_logout) { 2405 /* this is to send hangup signal to the develcon */ 2406 /* we toggle DTR. clear dtr - sleep 1 - set dtr */ 2407 /* ioctl will return ENOTTY for pty's but we ignore it */ 2408 /* exitstat will run after disconnect */ 2409 /* we sleep for 2 seconds to let things happen in */ 2410 /* .logout and rechist() */ 2411 #ifdef TIOCCDTR 2412 (void) sleep(2); 2413 (void) ioctl(FSHTTY, TIOCCDTR, NULL); 2414 (void) sleep(1); 2415 (void) ioctl(FSHTTY, TIOCSDTR, NULL); 2416 #endif /* TIOCCDTR */ 2417 } 2418 #endif /* TESLA */ 2419 2420 { 2421 struct process *pp, *np; 2422 pid_t mypid = getpid(); 2423 /* Kill all processes marked for hup'ing */ 2424 for (pp = proclist.p_next; pp; pp = pp->p_next) { 2425 np = pp; 2426 do 2427 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp && 2428 np->p_parentid == mypid) { 2429 if (killpg(np->p_jobid, SIGHUP) != -1) { 2430 /* In case the job was suspended... */ 2431 #ifdef SIGCONT 2432 (void) killpg(np->p_jobid, SIGCONT); 2433 #endif 2434 break; 2435 } 2436 } 2437 while ((np = np->p_friends) != pp); 2438 } 2439 } 2440 untty(); 2441 #ifdef NLS_CATALOGS 2442 /* 2443 * We need to call catclose, because SVR4 leaves symlinks behind otherwise 2444 * in the catalog directories. We cannot close on a vforked() child, 2445 * because messages will stop working on the parent too. 2446 */ 2447 if (child == 0) 2448 nlsclose(); 2449 #endif /* NLS_CATALOGS */ 2450 #ifdef WINNT_NATIVE 2451 nt_cleanup(); 2452 #endif /* WINNT_NATIVE */ 2453 _exit(i); 2454 } 2455 2456 #ifndef _PATH_DEFPATH 2457 static Char ** 2458 defaultpath(void) 2459 { 2460 char *ptr; 2461 Char **blk, **blkp; 2462 struct stat stb; 2463 2464 blkp = blk = xmalloc(sizeof(Char *) * 10); 2465 2466 #ifndef NODOT 2467 # ifndef DOTLAST 2468 *blkp++ = Strsave(STRdot); 2469 # endif 2470 #endif 2471 2472 #define DIRAPPEND(a) \ 2473 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \ 2474 *blkp++ = SAVE(ptr) 2475 2476 #ifdef _PATH_LOCAL 2477 DIRAPPEND(_PATH_LOCAL); 2478 #endif 2479 2480 #ifdef _PATH_USRUCB 2481 DIRAPPEND(_PATH_USRUCB); 2482 #endif 2483 2484 #ifdef _PATH_USRBSD 2485 DIRAPPEND(_PATH_USRBSD); 2486 #endif 2487 2488 #ifdef _PATH_BIN 2489 DIRAPPEND(_PATH_BIN); 2490 #endif 2491 2492 #ifdef _PATH_USRBIN 2493 DIRAPPEND(_PATH_USRBIN); 2494 #endif 2495 2496 #undef DIRAPPEND 2497 2498 #ifndef NODOT 2499 # ifdef DOTLAST 2500 *blkp++ = Strsave(STRdot); 2501 # endif 2502 #endif 2503 *blkp = NULL; 2504 return (blk); 2505 } 2506 #endif 2507 2508 static void 2509 record(void) 2510 { 2511 if (!fast) { 2512 recdirs(NULL, adrof(STRsavedirs) != NULL); 2513 rechist(NULL, adrof(STRsavehist) != NULL); 2514 } 2515 displayHistStats("Exiting"); /* no-op unless DEBUG_HIST */ 2516 } 2517 2518 /* 2519 * Grab the tty repeatedly, and give up if we are not in the correct 2520 * tty process group. 2521 */ 2522 int 2523 grabpgrp(int fd, pid_t desired) 2524 { 2525 struct sigaction old; 2526 pid_t pgrp; 2527 size_t i; 2528 2529 for (i = 0; i < 100; i++) { 2530 if ((pgrp = tcgetpgrp(fd)) == -1) 2531 return -1; 2532 if (pgrp == desired) 2533 return 0; 2534 (void)sigaction(SIGTTIN, NULL, &old); 2535 (void)signal(SIGTTIN, SIG_DFL); 2536 (void)kill(0, SIGTTIN); 2537 (void)sigaction(SIGTTIN, &old, NULL); 2538 } 2539 errno = EPERM; 2540 return -1; 2541 } 2542