1 /* $Header: /p/tcsh/cvsroot/tcsh/sh.c,v 3.185 2015/05/10 13:28:54 christos Exp $ */ 2 /* 3 * sh.c: Main shell routines 4 */ 5 /*- 6 * Copyright (c) 1980, 1991 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 #define EXTERN /* Intern */ 34 #include "sh.h" 35 36 #ifndef lint 37 char copyright[] = 38 "@(#) Copyright (c) 1991 The Regents of the University of California.\n\ 39 All rights reserved.\n"; 40 #endif /* not lint */ 41 42 RCSID("$tcsh: sh.c,v 3.185 2015/05/10 13:28:54 christos Exp $") 43 44 #include "tc.h" 45 #include "ed.h" 46 #include "tw.h" 47 48 extern int MapsAreInited; 49 extern int NLSMapsAreInited; 50 51 /* 52 * C Shell 53 * 54 * Bill Joy, UC Berkeley, California, USA 55 * October 1978, May 1980 56 * 57 * Jim Kulp, IIASA, Laxenburg, Austria 58 * April 1980 59 * 60 * Filename recognition added: 61 * Ken Greer, Ind. Consultant, Palo Alto CA 62 * October 1983. 63 * 64 * Karl Kleinpaste, Computer Consoles, Inc. 65 * Added precmd, periodic/tperiod, prompt changes, 66 * directory stack hack, and login watch. 67 * Sometime March 1983 - Feb 1984. 68 * 69 * Added scheduled commands, including the "sched" command, 70 * plus the call to sched_run near the precmd et al 71 * routines. 72 * Upgraded scheduled events for running events while 73 * sitting idle at command input. 74 * 75 * Paul Placeway, Ohio State 76 * added stuff for running with twenex/inputl 9 Oct 1984. 77 * 78 * ported to Apple Unix (TM) (OREO) 26 -- 29 Jun 1987 79 */ 80 81 jmp_buf_t reslab IZERO_STRUCT; 82 struct wordent paraml IZERO_STRUCT; 83 84 static const char tcshstr[] = "tcsh"; 85 86 struct sigaction parintr; /* Parents interrupt catch */ 87 struct sigaction parterm; /* Parents terminate catch */ 88 89 #ifdef TESLA 90 int do_logout = 0; 91 #endif /* TESLA */ 92 93 94 int use_fork = 0; /* use fork() instead of vfork()? */ 95 96 /* 97 * Magic pointer values. Used to specify other invalid conditions aside 98 * from null. 99 */ 100 static Char INVCHAR; 101 Char *INVPTR = &INVCHAR; 102 Char **INVPPTR = &INVPTR; 103 104 static int fast = 0; 105 static int mflag = 0; 106 static int prompt = 1; 107 int enterhist = 0; 108 int tellwhat = 0; 109 time_t t_period; 110 Char *ffile = NULL; 111 int dolzero = 0; 112 int insource = 0; 113 int exitset = 0; 114 static time_t chktim; /* Time mail last checked */ 115 char *progname; 116 int tcsh; 117 118 /* 119 * This preserves the input state of the shell. It is used by 120 * st_save and st_restore to manupulate shell state. 121 */ 122 struct saved_state { 123 int insource; 124 int OLDSTD; 125 int SHIN; 126 int SHOUT; 127 int SHDIAG; 128 int intty; 129 struct whyle *whyles; 130 Char *gointr; 131 Char *arginp; 132 Char *evalp; 133 Char **evalvec; 134 Char *alvecp; 135 Char **alvec; 136 int onelflg; 137 int enterhist; 138 Char **argv; 139 Char **av; 140 Char HIST; 141 int cantell; 142 struct Bin B; 143 int justpr; 144 }; 145 146 static int srccat (Char *, Char *); 147 #ifndef WINNT_NATIVE 148 static int srcfile (const char *, int, int, Char **); 149 #else 150 int srcfile (const char *, int, int, Char **); 151 #endif /*WINNT_NATIVE*/ 152 static void srcunit (int, int, int, Char **); 153 static void mailchk (void); 154 #ifndef _PATH_DEFPATH 155 static Char **defaultpath (void); 156 #endif 157 static void record (void); 158 static void st_save (struct saved_state *, int, int, 159 Char **, Char **); 160 static void st_restore (void *); 161 162 int main (int, char **); 163 164 #ifndef LOCALEDIR 165 #define LOCALEDIR "/usr/share/locale" 166 #endif 167 168 #ifdef NLS_CATALOGS 169 static void 170 add_localedir_to_nlspath(const char *path) 171 { 172 static const char msgs_LOC[] = "/%L/LC_MESSAGES/%N.cat"; 173 static const char msgs_lang[] = "/%l/LC_MESSAGES/%N.cat"; 174 char *old; 175 char *new, *new_p; 176 size_t len; 177 int add_LOC = 1; 178 int add_lang = 1; 179 char trypath[MAXPATHLEN]; 180 struct stat st; 181 182 if (path == NULL) 183 return; 184 185 (void) xsnprintf(trypath, sizeof(trypath), "%s/en/LC_MESSAGES/tcsh.cat", 186 path); 187 if (stat(trypath, &st) == -1) 188 return; 189 190 if ((old = getenv("NLSPATH")) != NULL) 191 len = strlen(old) + 1; /* don't forget the colon. */ 192 else 193 len = 0; 194 195 len += 2 * strlen(path) + 196 sizeof(msgs_LOC) + sizeof(msgs_lang); /* includes the extra colon */ 197 198 new = new_p = xcalloc(len, 1); 199 200 if (old != NULL) { 201 size_t pathlen = strlen(path); 202 char *old_p; 203 204 (void) xsnprintf(new_p, len, "%s", old); 205 new_p += strlen(new_p); 206 len -= new_p - new; 207 208 /* Check if the paths we try to add are already present in NLSPATH. 209 If so, note it by setting the appropriate flag to 0. */ 210 for (old_p = old; old_p; old_p = strchr(old_p, ':'), 211 old_p = old_p ? old_p + 1 : NULL) { 212 if (strncmp(old_p, path, pathlen) != 0) 213 continue; 214 if (strncmp(old_p + pathlen, msgs_LOC, sizeof(msgs_LOC) - 1) == 0) 215 add_LOC = 0; 216 else if (strncmp(old_p + pathlen, msgs_lang, 217 sizeof(msgs_lang) - 1) == 0) 218 add_lang = 0; 219 } 220 } 221 222 /* Add the message catalog paths not already present to NLSPATH. */ 223 if (add_LOC || add_lang) 224 (void) xsnprintf(new_p, len, "%s%s%s%s%s%s", 225 old ? ":" : "", 226 add_LOC ? path : "", add_LOC ? msgs_LOC : "", 227 add_LOC && add_lang ? ":" : "", 228 add_lang ? path : "", add_lang ? msgs_lang : ""); 229 230 tsetenv(STRNLSPATH, str2short(new)); 231 free(new); 232 } 233 #endif 234 235 int 236 main(int argc, char **argv) 237 { 238 int batch = 0; 239 volatile int nexececho = 0; 240 int nofile = 0; 241 volatile int nverbose = 0; 242 volatile int rdirs = 0; 243 int quitit = 0; 244 Char *cp; 245 #ifdef AUTOLOGOUT 246 Char *cp2; 247 #endif 248 char *tcp, *ttyn; 249 int f, reenter; 250 char **tempv; 251 int osetintr; 252 struct sigaction oparintr; 253 254 #ifdef WINNT_NATIVE 255 nt_init(); 256 #endif /* WINNT_NATIVE */ 257 258 (void)memset(&reslab, 0, sizeof(reslab)); 259 #if defined(NLS_CATALOGS) && defined(LC_MESSAGES) 260 (void) setlocale(LC_MESSAGES, ""); 261 #endif /* NLS_CATALOGS && LC_MESSAGES */ 262 263 #ifdef NLS 264 # ifdef LC_CTYPE 265 (void) setlocale(LC_CTYPE, ""); /* for iscntrl */ 266 # endif /* LC_CTYPE */ 267 #endif /* NLS */ 268 269 STR_environ = blk2short(environ); 270 environ = short2blk(STR_environ); /* So that we can free it */ 271 272 #ifdef NLS_CATALOGS 273 add_localedir_to_nlspath(LOCALEDIR); 274 #endif 275 276 nlsinit(); 277 278 #ifdef MALLOC_TRACE 279 mal_setstatsfile(fdopen(dmove(xopen("/tmp/tcsh.trace", 280 O_WRONLY|O_CREAT|O_LARGEFILE, 0666), 25), "w")); 281 mal_trace(1); 282 #endif /* MALLOC_TRACE */ 283 284 #if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX) 285 # ifdef _SC_CLK_TCK 286 clk_tck = (clock_t) sysconf(_SC_CLK_TCK); 287 # else /* ! _SC_CLK_TCK */ 288 # ifdef CLK_TCK 289 clk_tck = CLK_TCK; 290 # else /* !CLK_TCK */ 291 clk_tck = HZ; 292 # endif /* CLK_TCK */ 293 # endif /* _SC_CLK_TCK */ 294 #endif /* !BSDTIMES && POSIX */ 295 296 settimes(); /* Immed. estab. timing base */ 297 #ifdef TESLA 298 do_logout = 0; 299 #endif /* TESLA */ 300 301 /* 302 * Make sure we have 0, 1, 2 open 303 * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr) 304 */ 305 { 306 do 307 if ((f = xopen(_PATH_DEVNULL, O_RDONLY|O_LARGEFILE)) == -1 && 308 (f = xopen("/", O_RDONLY|O_LARGEFILE)) == -1) 309 exit(1); 310 while (f < 3); 311 xclose(f); 312 } 313 314 osinit(); /* Os dependent initialization */ 315 316 317 { 318 char *t; 319 320 t = strrchr(argv[0], '/'); 321 #ifdef WINNT_NATIVE 322 { 323 char *s = strrchr(argv[0], '\\'); 324 if (s) 325 t = s; 326 } 327 #endif /* WINNT_NATIVE */ 328 t = t ? t + 1 : argv[0]; 329 if (*t == '-') t++; 330 progname = strsave((t && *t) ? t : tcshstr); /* never want a null */ 331 tcsh = strncmp(progname, tcshstr, sizeof(tcshstr) - 1) == 0; 332 } 333 334 /* 335 * Initialize non constant strings 336 */ 337 #ifdef _PATH_BSHELL 338 STR_BSHELL = SAVE(_PATH_BSHELL); 339 #endif 340 #ifdef _PATH_TCSHELL 341 STR_SHELLPATH = SAVE(_PATH_TCSHELL); 342 #else 343 # ifdef _PATH_CSHELL 344 STR_SHELLPATH = SAVE(_PATH_CSHELL); 345 # endif 346 #endif 347 STR_WORD_CHARS = SAVE(WORD_CHARS); 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 if ((tcp = getenv("HOME")) != NULL) 599 cp = quote(SAVE(tcp)); 600 else 601 #ifdef __ANDROID__ 602 /* On Android, $HOME usually isn't set, so we can't load user RC files. 603 Check for the environment variable EXTERNAL_STORAGE, which contains 604 the mount point of the external storage (SD card, mostly). If 605 EXTERNAL_STORAGE isn't set fall back to "/sdcard". */ 606 if ((tcp = getenv("EXTERNAL_STORAGE")) != NULL) 607 cp = quote(SAVE(tcp)); 608 else 609 cp = quote(SAVE("/sdcard")); 610 #else 611 cp = NULL; 612 #endif 613 614 if (cp == NULL) 615 fast = 1; /* No home -> can't read scripts */ 616 else 617 setv(STRhome, cp, VAR_READWRITE); 618 619 dinit(cp); /* dinit thinks that HOME == cwd in a login 620 * shell */ 621 /* 622 * Grab other useful things from the environment. Should we grab 623 * everything?? 624 */ 625 { 626 char *cln, *cus, *cgr; 627 struct passwd *pw; 628 struct group *gr; 629 630 631 #ifdef apollo 632 int oid = getoid(); 633 634 setv(STRoid, Itoa(oid, 0, 0), VAR_READWRITE); 635 #endif /* apollo */ 636 637 setv(STReuid, Itoa(euid, 0, 0), VAR_READWRITE); 638 if ((pw = xgetpwuid(euid)) == NULL) 639 setcopy(STReuser, STRunknown, VAR_READWRITE); 640 else 641 setcopy(STReuser, str2short(pw->pw_name), VAR_READWRITE); 642 643 setv(STRuid, Itoa(uid, 0, 0), VAR_READWRITE); 644 645 setv(STRgid, Itoa(gid, 0, 0), VAR_READWRITE); 646 647 cln = getenv("LOGNAME"); 648 cus = getenv("USER"); 649 if (cus != NULL) 650 setv(STRuser, quote(SAVE(cus)), VAR_READWRITE); 651 else if (cln != NULL) 652 setv(STRuser, quote(SAVE(cln)), VAR_READWRITE); 653 else if ((pw = xgetpwuid(uid)) == NULL) 654 setcopy(STRuser, STRunknown, VAR_READWRITE); 655 else 656 setcopy(STRuser, str2short(pw->pw_name), VAR_READWRITE); 657 if (cln == NULL) 658 tsetenv(STRLOGNAME, varval(STRuser)); 659 if (cus == NULL) 660 tsetenv(STRKUSER, varval(STRuser)); 661 662 cgr = getenv("GROUP"); 663 if (cgr != NULL) 664 setv(STRgroup, quote(SAVE(cgr)), VAR_READWRITE); 665 else if ((gr = xgetgrgid(gid)) == NULL) 666 setcopy(STRgroup, STRunknown, VAR_READWRITE); 667 else 668 setcopy(STRgroup, str2short(gr->gr_name), VAR_READWRITE); 669 if (cgr == NULL) 670 tsetenv(STRKGROUP, varval(STRgroup)); 671 } 672 673 /* 674 * HOST may be wrong, since rexd transports the entire environment on sun 675 * 3.x Just set it again 676 */ 677 { 678 char cbuff[MAXHOSTNAMELEN]; 679 680 if (gethostname(cbuff, sizeof(cbuff)) >= 0) { 681 cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */ 682 tsetenv(STRHOST, str2short(cbuff)); 683 } 684 else 685 tsetenv(STRHOST, STRunknown); 686 } 687 688 689 #ifdef REMOTEHOST 690 /* 691 * Try to determine the remote host we were logged in from. 692 */ 693 remotehost(); 694 #endif /* REMOTEHOST */ 695 696 #ifdef apollo 697 if ((tcp = getenv("SYSTYPE")) == NULL) 698 tcp = "bsd4.3"; 699 tsetenv(STRSYSTYPE, quote(str2short(tcp))); 700 #endif /* apollo */ 701 702 /* 703 * set editing on by default, unless running under Emacs as an inferior 704 * shell. 705 * We try to do this intelligently. If $TERM is available, then it 706 * should determine if we should edit or not. $TERM is preserved 707 * across rlogin sessions, so we will not get confused if we rlogin 708 * under an emacs shell. Another advantage is that if we run an 709 * xterm under an emacs shell, then the $TERM will be set to 710 * xterm, so we are going to want to edit. Unfortunately emacs 711 * does not restore all the tty modes, so xterm is not very well 712 * set up. But this is not the shell's fault. 713 * Also don't edit if $TERM == wm, for when we're running under an ATK app. 714 * Finally, emacs compiled under terminfo, sets the terminal to dumb, 715 * so disable editing for that too. 716 * 717 * Unfortunately, in some cases the initial $TERM setting is "unknown", 718 * "dumb", or "network" which is then changed in the user's startup files. 719 * We fix this by setting noediting here if $TERM is unknown/dumb and 720 * if noediting is set, we switch on editing if $TERM is changed. 721 */ 722 if ((tcp = getenv("TERM")) != NULL) { 723 setv(STRterm, quote(SAVE(tcp)), VAR_READWRITE); 724 noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 || 725 strcmp(tcp, "network") == 0; 726 editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 && 727 !noediting; 728 } 729 else { 730 noediting = 0; 731 editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0); 732 } 733 734 /* 735 * The 'edit' variable is either set or unset. It doesn't 736 * need a value. Making it 'emacs' might be confusing. 737 */ 738 if (editing) 739 setNS(STRedit); 740 741 742 /* 743 * still more mutability: make the complete routine automatically add the 744 * suffix of file names... 745 */ 746 setNS(STRaddsuffix); 747 748 /* 749 * Compatibility with tcsh >= 6.12 by default 750 */ 751 setNS(STRcsubstnonl); 752 753 /* 754 * Random default kill ring size 755 */ 756 setcopy(STRkillring, str2short("30"), VAR_READWRITE); 757 758 /* 759 * Re-initialize path if set in environment 760 */ 761 if ((tcp = getenv("PATH")) == NULL) { 762 #ifdef _PATH_DEFPATH 763 importpath(str2short(_PATH_DEFPATH)); 764 #else /* !_PATH_DEFPATH */ 765 setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE); 766 #endif /* _PATH_DEFPATH */ 767 /* 768 * Export the path setting so that subsequent processes use the same path as we do. 769 */ 770 exportpath(adrof(STRpath)->vec); 771 } else 772 /* Importpath() allocates memory for the path, and the 773 * returned pointer from SAVE() was discarded, so 774 * this was a memory leak.. (sg) 775 * 776 * importpath(SAVE(tcp)); 777 */ 778 importpath(str2short(tcp)); 779 780 781 { 782 /* If the SHELL environment variable ends with "tcsh", set 783 * STRshell to the same path. This is to facilitate using 784 * the executable in environments where the compiled-in 785 * default isn't appropriate (sg). 786 */ 787 788 size_t sh_len = 0; 789 790 if ((tcp = getenv("SHELL")) != NULL) { 791 sh_len = strlen(tcp); 792 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) || 793 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0)) 794 setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE); 795 else 796 sh_len = 0; 797 } 798 if (sh_len == 0) 799 setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE); 800 } 801 802 #ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */ 803 if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL) 804 tcp = "SHELL"; 805 tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp))); 806 #endif /* _OSD_POSIX */ 807 808 #ifdef COLOR_LS_F 809 if ((tcp = getenv("LS_COLORS")) != NULL) 810 parseLS_COLORS(str2short(tcp)); 811 if ((tcp = getenv("LSCOLORS")) != NULL) 812 parseLSCOLORS(str2short(tcp)); 813 #endif /* COLOR_LS_F */ 814 815 doldol = putn((tcsh_number_t)getpid()); /* 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 arginp = SAVE(tempv[0]); 939 940 /* 941 * we put the command into a variable 942 */ 943 if (arginp != NULL) 944 setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE); 945 946 /* 947 * * Give an error on -c arguments that end in * backslash to 948 * ensure that you don't make * nonportable csh scripts. 949 */ 950 { 951 int count; 952 953 cp = Strend(arginp); 954 count = 0; 955 while (cp > arginp && *--cp == '\\') 956 ++count; 957 if ((count & 1) != 0) { 958 exiterr = 1; 959 stderror(ERR_ARGC); 960 } 961 } 962 prompt = 0; 963 nofile = 1; 964 break; 965 case 'd': /* -d Load directory stack from file */ 966 rdirs = 1; 967 break; 968 969 #ifdef apollo 970 case 'D': /* -D Define environment variable */ 971 { 972 Char *dp; 973 974 cp = str2short(tcp); 975 if (dp = Strchr(cp, '=')) { 976 *dp++ = '\0'; 977 tsetenv(cp, dp); 978 } 979 else 980 tsetenv(cp, STRNULL); 981 } 982 *tcp = '\0'; /* done with this argument */ 983 break; 984 #endif /* apollo */ 985 986 case 'e': /* -e Exit on any error */ 987 exiterr = 1; 988 break; 989 990 case 'f': /* -f Fast start */ 991 fast = 1; 992 break; 993 994 case 'i': /* -i Interactive, even if !intty */ 995 intact = 1; 996 nofile = 1; 997 break; 998 999 case 'm': /* -m read .cshrc (from su) */ 1000 mflag = 1; 1001 break; 1002 1003 case 'n': /* -n Don't execute */ 1004 noexec = 1; 1005 break; 1006 1007 case 'q': /* -q (Undoc'd) ... die on quit */ 1008 quitit = 1; 1009 break; 1010 1011 case 's': /* -s Read from std input */ 1012 nofile = 1; 1013 break; 1014 1015 case 't': /* -t Read one line from input */ 1016 onelflg = 2; 1017 prompt = 0; 1018 nofile = 1; 1019 break; 1020 1021 case 'v': /* -v Echo hist expanded input */ 1022 nverbose = 1; /* ... later */ 1023 break; 1024 1025 case 'x': /* -x Echo just before execution */ 1026 nexececho = 1; /* ... later */ 1027 break; 1028 1029 case 'V': /* -V Echo hist expanded input */ 1030 setNS(STRverbose); /* NOW! */ 1031 break; 1032 1033 case 'X': /* -X Echo just before execution */ 1034 setNS(STRecho); /* NOW! */ 1035 break; 1036 1037 case 'F': 1038 /* 1039 * This will cause children to be created using fork instead of 1040 * vfork. 1041 */ 1042 use_fork = 1; 1043 break; 1044 1045 case ' ': 1046 case '\t': 1047 case '\r': 1048 case '\n': 1049 /* 1050 * for O/S's that don't do the argument parsing right in 1051 * "#!/foo -f " scripts 1052 */ 1053 break; 1054 1055 default: /* Unknown command option */ 1056 exiterr = 1; 1057 stderror(ERR_TCSHUSAGE, tcp-1, progname); 1058 break; 1059 1060 } while (*tcp); 1061 tempv++, argc--; 1062 } 1063 1064 if (quitit) /* With all due haste, for debugging */ 1065 (void) signal(SIGQUIT, SIG_DFL); 1066 1067 /* 1068 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining 1069 * arguments the first of them is the name of a shell file from which to 1070 * read commands. 1071 */ 1072 if (nofile == 0 && argc > 0) { 1073 nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE); 1074 if (nofile < 0) { 1075 child = 1; /* So this ... */ 1076 /* ... doesn't return */ 1077 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 1078 } 1079 xfree(ffile); 1080 dolzero = 1; 1081 ffile = SAVE(tempv[0]); 1082 /* 1083 * Replace FSHIN. Handle /dev/std{in,out,err} specially 1084 * since once they are closed we cannot open them again. 1085 * In that case we use our own saved descriptors 1086 */ 1087 if ((SHIN = dmove(nofile, FSHIN)) < 0) 1088 switch(nofile) { 1089 case 0: 1090 SHIN = FSHIN; 1091 break; 1092 case 1: 1093 SHIN = FSHOUT; 1094 break; 1095 case 2: 1096 SHIN = FSHDIAG; 1097 break; 1098 default: 1099 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 1100 break; 1101 } 1102 (void) close_on_exec(SHIN, 1); 1103 prompt = 0; 1104 /* argc not used any more */ tempv++; 1105 } 1106 1107 /* 1108 * Call to closem() used to be part of initdesc(). Now called below where 1109 * the script name argument has become stdin. Kernel may have used a file 1110 * descriptor to hold the name of the script (setuid case) and this name 1111 * mustn't be lost by closing the fd too soon. 1112 */ 1113 closem(); 1114 1115 /* 1116 * Consider input a tty if it really is or we are interactive. but not for 1117 * editing (christos) 1118 */ 1119 if (!(intty = isatty(SHIN))) { 1120 if (adrof(STRedit)) 1121 unsetv(STRedit); 1122 editing = 0; 1123 } 1124 intty |= intact; 1125 #ifndef convex 1126 if (intty || (intact && isatty(SHOUT))) { 1127 if (!batch && (uid != euid || gid != egid)) { 1128 errno = EACCES; 1129 child = 1; /* So this ... */ 1130 /* ... doesn't return */ 1131 stderror(ERR_SYSTEM, progname, strerror(errno)); 1132 } 1133 } 1134 #endif /* convex */ 1135 isoutatty = isatty(SHOUT); 1136 isdiagatty = isatty(SHDIAG); 1137 /* 1138 * Decide whether we should play with signals or not. If we are explicitly 1139 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the 1140 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx") 1141 * Note that in only the login shell is it likely that parent may have set 1142 * signals to be ignored 1143 */ 1144 if (loginsh || intact || (intty && isatty(SHOUT))) 1145 setintr = 1; 1146 settell(); 1147 /* 1148 * Save the remaining arguments in argv. 1149 */ 1150 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE); 1151 1152 /* 1153 * Set up the prompt. 1154 */ 1155 if (prompt) { 1156 setcopy(STRprompt, STRdefprompt, VAR_READWRITE); 1157 /* that's a meta-questionmark */ 1158 setcopy(STRprompt2, STRmquestion, VAR_READWRITE); 1159 setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE); 1160 } 1161 1162 /* 1163 * If we are an interactive shell, then start fiddling with the signals; 1164 * this is a tricky game. 1165 */ 1166 shpgrp = mygetpgrp(); 1167 opgrp = tpgrp = -1; 1168 if (setintr) { 1169 struct sigaction osig; 1170 1171 **argv = '-'; 1172 if (!quitit) /* Wary! */ 1173 (void) signal(SIGQUIT, SIG_IGN); 1174 pintr_disabled = 1; 1175 sigset_interrupting(SIGINT, queue_pintr); 1176 (void) signal(SIGTERM, SIG_IGN); 1177 1178 /* 1179 * No reason I can see not to save history on all these events.. 1180 * Most usual occurrence is in a window system, where we're not a login 1181 * shell, but might as well be... (sg) 1182 * But there might be races when lots of shells exit together... 1183 * [this is also incompatible]. 1184 * We have to be mre careful here. If the parent wants to 1185 * ignore the signals then we leave them untouched... 1186 * We also only setup the handlers for shells that are trully 1187 * interactive. 1188 */ 1189 sigaction(SIGHUP, NULL, &osig); 1190 if (loginsh || osig.sa_handler != SIG_IGN) 1191 /* exit processing on HUP */ 1192 sigset_interrupting(SIGHUP, queue_phup); 1193 #ifdef SIGXCPU 1194 sigaction(SIGXCPU, NULL, &osig); 1195 if (loginsh || osig.sa_handler != SIG_IGN) 1196 /* exit processing on XCPU */ 1197 sigset_interrupting(SIGXCPU, queue_phup); 1198 #endif 1199 #ifdef SIGXFSZ 1200 sigaction(SIGXFSZ, NULL, &osig); 1201 if (loginsh || osig.sa_handler != SIG_IGN) 1202 /* exit processing on XFSZ */ 1203 sigset_interrupting(SIGXFSZ, queue_phup); 1204 #endif 1205 1206 if (quitit == 0 && arginp == 0) { 1207 #ifdef SIGTSTP 1208 (void) signal(SIGTSTP, SIG_IGN); 1209 #endif 1210 #ifdef SIGTTIN 1211 (void) signal(SIGTTIN, SIG_IGN); 1212 #endif 1213 #ifdef SIGTTOU 1214 (void) signal(SIGTTOU, SIG_IGN); 1215 #endif 1216 /* 1217 * Wait till in foreground, in case someone stupidly runs csh & 1218 * dont want to try to grab away the tty. 1219 */ 1220 if (isatty(FSHDIAG)) 1221 f = FSHDIAG; 1222 else if (isatty(FSHOUT)) 1223 f = FSHOUT; 1224 else if (isatty(OLDSTD)) 1225 f = OLDSTD; 1226 else 1227 f = -1; 1228 1229 #ifdef NeXT 1230 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */ 1231 if (f != -1 && shpgrp == 0) { 1232 shpgrp = getpid(); 1233 (void) setpgid(0, shpgrp); 1234 (void) tcsetpgrp(f, shpgrp); 1235 } 1236 #endif /* NeXT */ 1237 #ifdef BSDJOBS /* if we have tty job control */ 1238 if (f != -1 && grabpgrp(f, shpgrp) != -1) { 1239 /* 1240 * Thanks to Matt Day for the POSIX references, and to 1241 * Paul Close for the SGI clarification. 1242 */ 1243 if (setdisc(f) != -1) { 1244 opgrp = shpgrp; 1245 shpgrp = getpid(); 1246 tpgrp = shpgrp; 1247 if (tcsetpgrp(f, shpgrp) == -1) { 1248 /* 1249 * On hpux 7.03 this fails with EPERM. This happens on 1250 * the 800 when opgrp != shpgrp at this point. (we were 1251 * forked from a non job control shell) 1252 * POSIX 7.2.4, says we failed because the process 1253 * group specified did not belong to a process 1254 * in the same session with the tty. So we set our 1255 * process group and try again. 1256 */ 1257 if (setpgid(0, shpgrp) == -1) { 1258 xprintf("setpgid:"); 1259 goto notty; 1260 } 1261 if (tcsetpgrp(f, shpgrp) == -1) { 1262 xprintf("tcsetpgrp:"); 1263 goto notty; 1264 } 1265 } 1266 /* 1267 * We check the process group now. If it is the same, then 1268 * we don't need to set it again. On hpux 7.0 on the 300's 1269 * if we set it again it fails with EPERM. This is the 1270 * correct behavior according to POSIX 4.3.3 if the process 1271 * was a session leader . 1272 */ 1273 else if (shpgrp != mygetpgrp()) { 1274 if(setpgid(0, shpgrp) == -1) { 1275 xprintf("setpgid:"); 1276 goto notty; 1277 } 1278 } 1279 #ifdef IRIS4D 1280 /* 1281 * But on irix 3.3 we need to set it again, even if it is 1282 * the same. We do that to tell the system that we 1283 * need BSD process group compatibility. 1284 */ 1285 else 1286 (void) setpgid(0, shpgrp); 1287 #endif 1288 (void) close_on_exec(dcopy(f, FSHTTY), 1); 1289 } 1290 else 1291 tpgrp = -1; 1292 } 1293 if (tpgrp == -1) { 1294 notty: 1295 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"), 1296 strerror(errno)); 1297 xprintf("%s", 1298 CGETS(11, 2, "Thus no job control in this shell.\n")); 1299 /* 1300 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't 1301 * have access to tty, disable editing too 1302 */ 1303 if (adrof(STRedit)) 1304 unsetv(STRedit); 1305 editing = 0; 1306 } 1307 #else /* BSDJOBS */ /* don't have job control, so frotz it */ 1308 tpgrp = -1; 1309 #endif /* BSDJOBS */ 1310 } 1311 } 1312 if (setintr == 0 && parintr.sa_handler == SIG_DFL) 1313 setintr = 1; 1314 1315 /* 1316 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the 1317 * handler is installed with signal(2) or sigset(2). sigaction(2) must 1318 * be used instead. 1319 * 1320 * David Dawes (dawes@physics.su.oz.au) Sept 1991 1321 */ 1322 sigset_interrupting(SIGCHLD, queue_pchild); 1323 1324 if (intty && !arginp) 1325 (void) ed_Setup(editing);/* Get the tty state, and set defaults */ 1326 /* Only alter the tty state if editing */ 1327 1328 /* 1329 * Set an exit here in case of an interrupt or error reading the shell 1330 * start-up scripts. 1331 */ 1332 osetintr = setintr; 1333 oparintr = parintr; 1334 (void)cleanup_push_mark(); /* There is no outer handler */ 1335 if (setexit() != 0) /* PWP */ 1336 reenter = 1; 1337 else 1338 reenter = 0; 1339 exitset++; 1340 haderr = 0; /* In case second time through */ 1341 if (!fast && reenter == 0) { 1342 /* Will have varval(STRhome) here because set fast if don't */ 1343 { 1344 pintr_disabled++; 1345 cleanup_push(&pintr_disabled, disabled_cleanup); 1346 setintr = 0;/*FIXRESET:cleanup*/ 1347 /* onintr in /etc/ files has no effect */ 1348 parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/ 1349 #ifdef LOGINFIRST 1350 #ifdef _PATH_DOTLOGIN 1351 if (loginsh) 1352 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1353 #endif 1354 #endif 1355 1356 #ifdef _PATH_DOTCSHRC 1357 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL); 1358 #endif 1359 if (!arginp && !onelflg && !havhash) 1360 dohash(NULL,NULL); 1361 #ifndef LOGINFIRST 1362 #ifdef _PATH_DOTLOGIN 1363 if (loginsh) 1364 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1365 #endif 1366 #endif 1367 cleanup_until(&pintr_disabled); 1368 setintr = osetintr; 1369 parintr = oparintr; 1370 } 1371 #ifdef LOGINFIRST 1372 if (loginsh) 1373 (void) srccat(varval(STRhome), STRsldotlogin); 1374 #endif 1375 /* upward compat. */ 1376 if (!srccat(varval(STRhome), STRsldottcshrc)) 1377 (void) srccat(varval(STRhome), STRsldotcshrc); 1378 1379 if (!arginp && !onelflg && !havhash) 1380 dohash(NULL,NULL); 1381 1382 /* 1383 * Source history before .login so that it is available in .login 1384 */ 1385 loadhist(NULL, 0); 1386 #ifndef LOGINFIRST 1387 if (loginsh) 1388 (void) srccat(varval(STRhome), STRsldotlogin); 1389 #endif 1390 if (loginsh || rdirs) 1391 loaddirs(NULL); 1392 } 1393 /* Reset interrupt flag */ 1394 setintr = osetintr; 1395 parintr = oparintr; 1396 exitset--; 1397 1398 /* Initing AFTER .cshrc is the Right Way */ 1399 if (intty && !arginp) { /* PWP setup stuff */ 1400 ed_Init(); /* init the new line editor */ 1401 #ifdef SIG_WINDOW 1402 check_window_size(1); /* mung environment */ 1403 #endif /* SIG_WINDOW */ 1404 } 1405 1406 /* 1407 * Now are ready for the -v and -x flags 1408 */ 1409 if (nverbose) 1410 setNS(STRverbose); 1411 if (nexececho) 1412 setNS(STRecho); 1413 1414 /* 1415 * All the rest of the world is inside this call. The argument to process 1416 * indicates whether it should catch "error unwinds". Thus if we are a 1417 * interactive shell our call here will never return by being blown past on 1418 * an error. 1419 */ 1420 process(setintr); 1421 1422 /* 1423 * Mop-up. 1424 */ 1425 /* Take care of these (especially HUP) here instead of inside flush. */ 1426 handle_pending_signals(); 1427 if (intty) { 1428 if (loginsh) { 1429 xprintf("logout\n"); 1430 xclose(SHIN); 1431 child = 1; 1432 #ifdef TESLA 1433 do_logout = 1; 1434 #endif /* TESLA */ 1435 goodbye(NULL, NULL); 1436 } 1437 else { 1438 xprintf("exit\n"); 1439 } 1440 } 1441 record(); 1442 exitstat(); 1443 return (0); 1444 } 1445 1446 void 1447 untty(void) 1448 { 1449 #ifdef BSDJOBS 1450 if (tpgrp > 0 && opgrp != shpgrp) { 1451 (void) setpgid(0, opgrp); 1452 (void) tcsetpgrp(FSHTTY, opgrp); 1453 (void) resetdisc(FSHTTY); 1454 } 1455 #endif /* BSDJOBS */ 1456 } 1457 1458 void 1459 importpath(Char *cp) 1460 { 1461 size_t i = 0; 1462 Char *dp; 1463 Char **pv; 1464 int c; 1465 1466 for (dp = cp; *dp; dp++) 1467 if (*dp == PATHSEP) 1468 i++; 1469 /* 1470 * i+2 where i is the number of colons in the path. There are i+1 1471 * directories in the path plus we need room for a zero terminator. 1472 */ 1473 pv = xcalloc(i + 2, sizeof(Char *)); 1474 dp = cp; 1475 i = 0; 1476 if (*dp) 1477 for (;;) { 1478 if ((c = *dp) == PATHSEP || c == 0) { 1479 *dp = 0; 1480 pv[i++] = Strsave(*cp ? cp : STRdot); 1481 if (c) { 1482 cp = dp + 1; 1483 *dp = PATHSEP; 1484 } 1485 else 1486 break; 1487 } 1488 #ifdef WINNT_NATIVE 1489 else if (*dp == '\\') 1490 *dp = '/'; 1491 #endif /* WINNT_NATIVE */ 1492 dp++; 1493 } 1494 pv[i] = 0; 1495 cleanup_push(pv, blk_cleanup); 1496 setq(STRpath, pv, &shvhed, VAR_READWRITE); 1497 cleanup_ignore(pv); 1498 cleanup_until(pv); 1499 } 1500 1501 /* 1502 * Source to the file which is the catenation of the argument names. 1503 */ 1504 static int 1505 srccat(Char *cp, Char *dp) 1506 { 1507 if (cp[0] == '/' && cp[1] == '\0') 1508 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL); 1509 else { 1510 Char *ep; 1511 char *ptr; 1512 int rv; 1513 1514 #ifdef WINNT_NATIVE 1515 ep = Strend(cp); 1516 if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */ 1517 dp++; 1518 #endif /* WINNT_NATIVE */ 1519 1520 ep = Strspl(cp, dp); 1521 cleanup_push(ep, xfree); 1522 ptr = short2str(ep); 1523 1524 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL); 1525 cleanup_until(ep); 1526 return rv; 1527 } 1528 } 1529 1530 /* 1531 * Source to a file putting the file descriptor in a safe place (> 2). 1532 */ 1533 #ifndef WINNT_NATIVE 1534 static int 1535 #else 1536 int 1537 #endif /*WINNT_NATIVE*/ 1538 srcfile(const char *f, int onlyown, int flag, Char **av) 1539 { 1540 int unit; 1541 1542 if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1) 1543 return 0; 1544 cleanup_push(&unit, open_cleanup); 1545 unit = dmove(unit, -1); 1546 cleanup_ignore(&unit); 1547 cleanup_until(&unit); 1548 1549 (void) close_on_exec(unit, 1); 1550 srcunit(unit, onlyown, flag, av); 1551 return 1; 1552 } 1553 1554 1555 /* 1556 * Save the shell state, and establish new argument vector, and new input 1557 * fd. 1558 */ 1559 static void 1560 st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av) 1561 { 1562 st->insource = insource; 1563 st->SHIN = SHIN; 1564 /* Want to preserve the meaning of "source file >output". 1565 * Save old descriptors, move new 0,1,2 to safe places and assign 1566 * them to SH* and let process() redo 0,1,2 from them. 1567 * 1568 * The macro returns true if d1 and d2 are good and they point to 1569 * different things. If you don't avoid saving duplicate 1570 * descriptors, you really limit the depth of "source" recursion 1571 * you can do because of all the open file descriptors. -IAN! 1572 */ 1573 #define NEED_SAVE_FD(d1,d2) \ 1574 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \ 1575 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) ) 1576 1577 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */ 1578 if (didfds) { 1579 struct stat s1, s2; 1580 if (NEED_SAVE_FD(0,OLDSTD)) { 1581 st->OLDSTD = OLDSTD; 1582 OLDSTD = dmove(0, -1); 1583 (void)close_on_exec(OLDSTD, 1); 1584 } 1585 if (NEED_SAVE_FD(1,SHOUT)) { 1586 st->SHOUT = SHOUT; 1587 SHOUT = dmove(1, -1); 1588 (void)close_on_exec(SHOUT, 1); 1589 } 1590 if (NEED_SAVE_FD(2,SHDIAG)) { 1591 st->SHDIAG = SHDIAG; 1592 SHDIAG = dmove(2, -1); 1593 (void)close_on_exec(SHDIAG, 1); 1594 } 1595 donefds(); 1596 } 1597 1598 st->intty = intty; 1599 st->whyles = whyles; 1600 st->gointr = gointr; 1601 st->arginp = arginp; 1602 st->evalp = evalp; 1603 st->evalvec = evalvec; 1604 st->alvecp = alvecp; 1605 st->alvec = alvec; 1606 st->onelflg = onelflg; 1607 st->enterhist = enterhist; 1608 st->justpr = justpr; 1609 if (hflg) 1610 st->HIST = HIST; 1611 else 1612 st->HIST = '\0'; 1613 st->cantell = cantell; 1614 cpybin(st->B, B); 1615 1616 /* 1617 * we can now pass arguments to source. 1618 * For compatibility we do that only if arguments were really 1619 * passed, otherwise we keep the old, global $argv like before. 1620 */ 1621 if (av != NULL && *av != NULL) { 1622 struct varent *vp; 1623 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL) 1624 st->argv = saveblk(vp->vec); 1625 else 1626 st->argv = NULL; 1627 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE); 1628 } 1629 else 1630 st->argv = NULL; 1631 st->av = av; 1632 1633 SHIN = unit; /* Do this first */ 1634 1635 /* Establish new input arena */ 1636 { 1637 fbuf = NULL; 1638 fseekp = feobp = fblocks = 0; 1639 settell(); 1640 } 1641 1642 arginp = 0; 1643 onelflg = 0; 1644 intty = isatty(SHIN); 1645 whyles = 0; 1646 gointr = 0; 1647 evalvec = 0; 1648 evalp = 0; 1649 alvec = al; 1650 alvecp = 0; 1651 enterhist = hflg; 1652 if (enterhist) 1653 HIST = '\0'; 1654 insource = 1; 1655 } 1656 1657 1658 /* 1659 * Restore the shell to a saved state 1660 */ 1661 static void 1662 st_restore(void *xst) 1663 { 1664 struct saved_state *st; 1665 1666 st = xst; 1667 if (st->SHIN == -1) 1668 return; 1669 1670 /* Reset input arena */ 1671 { 1672 int i; 1673 Char** nfbuf = fbuf; 1674 int nfblocks = fblocks; 1675 1676 fblocks = 0; 1677 fbuf = NULL; 1678 for (i = 0; i < nfblocks; i++) 1679 xfree(nfbuf[i]); 1680 xfree(nfbuf); 1681 } 1682 cpybin(B, st->B); 1683 1684 xclose(SHIN); 1685 1686 insource = st->insource; 1687 SHIN = st->SHIN; 1688 if (st->OLDSTD != -1) 1689 xclose(OLDSTD), OLDSTD = st->OLDSTD; 1690 if (st->SHOUT != -1) 1691 xclose(SHOUT), SHOUT = st->SHOUT; 1692 if (st->SHDIAG != -1) 1693 xclose(SHDIAG), SHDIAG = st->SHDIAG; 1694 arginp = st->arginp; 1695 onelflg = st->onelflg; 1696 evalp = st->evalp; 1697 evalvec = st->evalvec; 1698 alvecp = st->alvecp; 1699 alvec = st->alvec; 1700 intty = st->intty; 1701 whyles = st->whyles; 1702 gointr = st->gointr; 1703 if (st->HIST != '\0') 1704 HIST = st->HIST; 1705 enterhist = st->enterhist; 1706 cantell = st->cantell; 1707 justpr = st->justpr; 1708 1709 if (st->argv != NULL) 1710 setq(STRargv, st->argv, &shvhed, VAR_READWRITE); 1711 else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL) 1712 unsetv(STRargv); 1713 } 1714 1715 /* 1716 * Source to a unit. If onlyown it must be our file or our group or 1717 * we don't chance it. This occurs on ".cshrc"s and the like. 1718 */ 1719 static void 1720 srcunit(int unit, int onlyown, int hflg, Char **av) 1721 { 1722 struct saved_state st; 1723 1724 st.SHIN = -1; /* st_restore checks this */ 1725 1726 if (unit < 0) 1727 return; 1728 1729 if (onlyown) { 1730 struct stat stb; 1731 1732 if (fstat(unit, &stb) < 0) { 1733 xclose(unit); 1734 return; 1735 } 1736 } 1737 1738 /* Does nothing before st_save() because st.SHIN == -1 */ 1739 cleanup_push(&st, st_restore); 1740 if (setintr) { 1741 pintr_disabled++; 1742 cleanup_push(&pintr_disabled, disabled_cleanup); 1743 } 1744 1745 /* Save the current state and move us to a new state */ 1746 st_save(&st, unit, hflg, NULL, av); 1747 1748 /* 1749 * Now if we are allowing commands to be interrupted, we let ourselves be 1750 * interrupted. 1751 */ 1752 if (setintr) { 1753 cleanup_until(&pintr_disabled); 1754 pintr_disabled++; 1755 cleanup_push(&pintr_disabled, disabled_cleanup); 1756 } 1757 1758 process(0); /* 0 -> blow away on errors */ 1759 1760 /* Restore the old state */ 1761 cleanup_until(&st); 1762 } 1763 1764 1765 /*ARGSUSED*/ 1766 void 1767 goodbye(Char **v, struct command *c) 1768 { 1769 USE(v); 1770 USE(c); 1771 record(); 1772 1773 if (loginsh) { 1774 size_t omark; 1775 sigset_t set; 1776 1777 sigemptyset(&set); 1778 signal(SIGQUIT, SIG_IGN); 1779 sigaddset(&set, SIGQUIT); 1780 sigprocmask(SIG_UNBLOCK, &set, NULL); 1781 signal(SIGINT, SIG_IGN); 1782 sigaddset(&set, SIGINT); 1783 signal(SIGTERM, SIG_IGN); 1784 sigaddset(&set, SIGTERM); 1785 signal(SIGHUP, SIG_IGN); 1786 sigaddset(&set, SIGHUP); 1787 sigprocmask(SIG_UNBLOCK, &set, NULL); 1788 phup_disabled = 1; 1789 setintr = 0; /* No interrupts after "logout" */ 1790 /* Trap errors inside .logout */ 1791 omark = cleanup_push_mark(); 1792 if (setexit() == 0) { 1793 if (!(adrof(STRlogout))) 1794 setcopy(STRlogout, STRnormal, VAR_READWRITE); 1795 #ifdef _PATH_DOTLOGOUT 1796 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1797 #endif 1798 if (adrof(STRhome)) 1799 (void) srccat(varval(STRhome), STRsldtlogout); 1800 #ifdef TESLA 1801 do_logout = 1; 1802 #endif /* TESLA */ 1803 } 1804 cleanup_pop_mark(omark); 1805 } 1806 exitstat(); 1807 } 1808 1809 void 1810 exitstat(void) 1811 { 1812 #ifdef PROF 1813 _mcleanup(); 1814 #endif 1815 /* 1816 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit 1817 * directly because we poke child here. Otherwise we might continue 1818 * unwarrantedly (sic). 1819 */ 1820 child = 1; 1821 1822 xexit(getn(varval(STRstatus))); 1823 } 1824 1825 /* 1826 * in the event of a HUP we want to save the history 1827 */ 1828 void 1829 phup(void) 1830 { 1831 if (loginsh) { 1832 setcopy(STRlogout, STRhangup, VAR_READWRITE); 1833 #ifdef _PATH_DOTLOGOUT 1834 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1835 #endif 1836 if (adrof(STRhome)) 1837 (void) srccat(varval(STRhome), STRsldtlogout); 1838 } 1839 1840 record(); 1841 1842 #ifdef POSIXJOBS 1843 /* 1844 * We kill the last foreground process group. It then becomes 1845 * responsible to propagate the SIGHUP to its progeny. 1846 */ 1847 { 1848 struct process *pp, *np; 1849 1850 for (pp = proclist.p_next; pp; pp = pp->p_next) { 1851 np = pp; 1852 /* 1853 * Find if this job is in the foreground. It could be that 1854 * the process leader has exited and the foreground flag 1855 * is cleared for it. 1856 */ 1857 do 1858 /* 1859 * If a process is in the foreground we try to kill 1860 * it's process group. If we succeed, then the 1861 * whole job is gone. Otherwise we keep going... 1862 * But avoid sending HUP to the shell again. 1863 */ 1864 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) { 1865 np->p_flags &= ~PHUP; 1866 if (killpg(np->p_jobid, SIGHUP) != -1) { 1867 /* In case the job was suspended... */ 1868 #ifdef SIGCONT 1869 (void) killpg(np->p_jobid, SIGCONT); 1870 #endif 1871 break; 1872 } 1873 } 1874 while ((np = np->p_friends) != pp); 1875 } 1876 } 1877 #endif /* POSIXJOBS */ 1878 1879 xexit(SIGHUP); 1880 } 1881 1882 static Char *jobargv[2] = {STRjobs, 0}; 1883 1884 /* 1885 * Catch an interrupt, e.g. during lexical input. 1886 * If we are an interactive shell, we reset the interrupt catch 1887 * immediately. In any case we drain the shell output, 1888 * and finally go through the normal error mechanism, which 1889 * gets a chance to make the shell go away. 1890 */ 1891 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */ 1892 1893 void 1894 pintr(void) 1895 { 1896 just_signaled = 1; 1897 pintr1(1); 1898 } 1899 1900 void 1901 pintr1(int wantnl) 1902 { 1903 if (setintr) { 1904 if (pjobs) { 1905 pjobs = 0; 1906 xputchar('\n'); 1907 dojobs(jobargv, NULL); 1908 stderror(ERR_NAME | ERR_INTR); 1909 } 1910 } 1911 /* MH - handle interrupted completions specially */ 1912 { 1913 if (InsideCompletion) 1914 stderror(ERR_SILENT); 1915 } 1916 /* JV - Make sure we shut off inputl */ 1917 { 1918 (void) Cookedmode(); 1919 GettingInput = 0; 1920 if (evalvec) 1921 doneinp = 1; 1922 } 1923 drainoline(); 1924 #ifdef HAVE_GETPWENT 1925 (void) endpwent(); 1926 #endif 1927 1928 /* 1929 * If we have an active "onintr" then we search for the label. Note that if 1930 * one does "onintr -" then we shan't be interruptible so we needn't worry 1931 * about that here. 1932 */ 1933 if (gointr) { 1934 gotolab(gointr); 1935 reset(); 1936 } 1937 else if (intty && wantnl) { 1938 if (editing) { 1939 /* 1940 * If we are editing a multi-line input command, and move to 1941 * the beginning of the line, we don't want to trash it when 1942 * we hit ^C 1943 */ 1944 PastBottom(); 1945 ClearLines(); 1946 ClearDisp(); 1947 } 1948 else { 1949 /* xputchar('\n'); *//* Some like this, others don't */ 1950 (void) putraw('\r'); 1951 (void) putraw('\n'); 1952 } 1953 } 1954 stderror(ERR_SILENT); 1955 } 1956 1957 /* 1958 * Process is the main driving routine for the shell. 1959 * It runs all command processing, except for those within { ... } 1960 * in expressions (which is run by a routine evalav in sh.exp.c which 1961 * is a stripped down process), and `...` evaluation which is run 1962 * also by a subset of this code in sh.glob.c in the routine backeval. 1963 * 1964 * The code here is a little strange because part of it is interruptible 1965 * and hence freeing of structures appears to occur when none is necessary 1966 * if this is ignored. 1967 * 1968 * Note that if catch is not set then we will unwind on any error. 1969 * If an end-of-file occurs, we return. 1970 */ 1971 void 1972 process(int catch) 1973 { 1974 jmp_buf_t osetexit; 1975 /* PWP: This might get nuked by longjmp so don't make it a register var */ 1976 size_t omark; 1977 volatile int didexitset = 0; 1978 1979 getexit(osetexit); 1980 omark = cleanup_push_mark(); 1981 for (;;) { 1982 struct command *t; 1983 int hadhist, old_pintr_disabled; 1984 1985 (void)setexit(); 1986 if (didexitset == 0) { 1987 exitset++; 1988 didexitset++; 1989 } 1990 pendjob(); 1991 1992 justpr = enterhist; /* execute if not entering history */ 1993 1994 if (haderr) { 1995 if (!catch) { 1996 /* unwind */ 1997 doneinp = 0; 1998 cleanup_pop_mark(omark); 1999 resexit(osetexit); 2000 reset(); 2001 } 2002 haderr = 0; 2003 /* 2004 * Every error is eventually caught here or the shell dies. It is 2005 * at this point that we clean up any left-over open files, by 2006 * closing all but a fixed number of pre-defined files. Thus 2007 * routines don't have to worry about leaving files open due to 2008 * deeper errors... they will get closed here. 2009 */ 2010 closem(); 2011 continue; 2012 } 2013 if (doneinp) { 2014 doneinp = 0; 2015 break; 2016 } 2017 if (chkstop) 2018 chkstop--; 2019 if (neednote) 2020 pnote(); 2021 if (intty && prompt && evalvec == 0) { 2022 just_signaled = 0; 2023 mailchk(); 2024 /* 2025 * Watch for logins/logouts. Next is scheduled commands stored 2026 * previously using "sched." Then execute periodic commands. 2027 * Following that, the prompt precmd is run. 2028 */ 2029 #ifndef HAVENOUTMP 2030 watch_login(0); 2031 #endif /* !HAVENOUTMP */ 2032 sched_run(); 2033 period_cmd(); 2034 precmd(); 2035 /* 2036 * If we are at the end of the input buffer then we are going to 2037 * read fresh stuff. Otherwise, we are rereading input and don't 2038 * need or want to prompt. 2039 */ 2040 if (fseekp == feobp && aret == TCSH_F_SEEK) 2041 printprompt(0, NULL); 2042 flush(); 2043 setalarm(1); 2044 } 2045 if (seterr) { 2046 xfree(seterr); 2047 seterr = NULL; 2048 } 2049 2050 /* 2051 * Interruptible during interactive reads 2052 */ 2053 if (setintr) 2054 pintr_push_enable(&old_pintr_disabled); 2055 hadhist = lex(¶ml); 2056 if (setintr) 2057 cleanup_until(&old_pintr_disabled); 2058 cleanup_push(¶ml, lex_cleanup); 2059 2060 /* 2061 * Echo not only on VERBOSE, but also with history expansion. If there 2062 * is a lexical error then we forego history echo. 2063 * Do not echo if we're only entering history (source -h). 2064 */ 2065 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) || 2066 (!enterhist && adrof(STRverbose))) 2067 { 2068 int odidfds = didfds; 2069 haderr = 1; 2070 didfds = 0; 2071 prlex(¶ml); 2072 flush(); 2073 haderr = 0; 2074 didfds = odidfds; 2075 } 2076 (void) alarm(0); /* Autologout OFF */ 2077 alrmcatch_disabled = 1; 2078 2079 /* 2080 * Save input text on the history list if reading in old history, or it 2081 * is from the terminal at the top level and not in a loop. 2082 * 2083 * PWP: entry of items in the history list while in a while loop is done 2084 * elsewhere... 2085 */ 2086 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun)) 2087 savehist(¶ml, enterhist > 1); 2088 2089 if (Expand && seterr) 2090 Expand = 0; 2091 2092 /* 2093 * Print lexical error messages, except when sourcing history lists. 2094 */ 2095 if (!enterhist && seterr) 2096 stderror(ERR_OLD); 2097 2098 /* 2099 * If had a history command :p modifier then this is as far as we 2100 * should go 2101 */ 2102 if (justpr) 2103 goto cmd_done; 2104 2105 /* 2106 * If had a tellwhat from twenex() then do 2107 */ 2108 if (tellwhat) { 2109 (void) tellmewhat(¶ml, NULL); 2110 goto cmd_done; 2111 } 2112 2113 alias(¶ml); 2114 2115 #ifdef BSDJOBS 2116 /* 2117 * If we are interactive, try to continue jobs that we have stopped 2118 */ 2119 if (prompt) 2120 continue_jobs(¶ml); 2121 #endif /* BSDJOBS */ 2122 2123 /* 2124 * Check to see if the user typed "rm * .o" or something 2125 */ 2126 if (prompt) 2127 rmstar(¶ml); 2128 /* 2129 * Parse the words of the input into a parse tree. 2130 */ 2131 t = syntax(paraml.next, ¶ml, 0); 2132 /* 2133 * We cannot cleanup push here, because cd /blah; echo foo 2134 * would rewind t on the chdir error, and free the rest of the command 2135 */ 2136 if (seterr) { 2137 freesyn(t); 2138 stderror(ERR_OLD); 2139 } 2140 2141 postcmd(); 2142 /* 2143 * Execute the parse tree From: Michael Schroeder 2144 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp); 2145 */ 2146 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE); 2147 freesyn(t); 2148 2149 /* 2150 * Made it! 2151 */ 2152 #ifdef SIG_WINDOW 2153 if (windowchg || (catch && intty && !whyles && !tellwhat)) { 2154 (void) check_window_size(0); /* for window systems */ 2155 } 2156 #endif /* SIG_WINDOW */ 2157 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB); 2158 cmd_done: 2159 if (cleanup_reset()) 2160 cleanup_until(¶ml); 2161 else 2162 haderr = 1; 2163 } 2164 cleanup_pop_mark(omark); 2165 resexit(osetexit); 2166 exitset--; 2167 handle_pending_signals(); 2168 } 2169 2170 /*ARGSUSED*/ 2171 void 2172 dosource(Char **t, struct command *c) 2173 { 2174 Char *f; 2175 int hflg = 0; 2176 char *file; 2177 2178 USE(c); 2179 t++; 2180 if (*t && eq(*t, STRmh)) { 2181 if (*++t == NULL) 2182 stderror(ERR_NAME | ERR_HFLAG); 2183 hflg++; 2184 } 2185 else if (*t && eq(*t, STRmm)) { 2186 if (*++t == NULL) 2187 stderror(ERR_NAME | ERR_MFLAG); 2188 hflg = 2; 2189 } 2190 2191 f = globone(*t++, G_ERROR); 2192 file = strsave(short2str(f)); 2193 cleanup_push(file, xfree); 2194 xfree(f); 2195 t = glob_all_or_error(t); 2196 cleanup_push(t, blk_cleanup); 2197 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet)) 2198 stderror(ERR_SYSTEM, file, strerror(errno)); 2199 cleanup_until(file); 2200 } 2201 2202 /* 2203 * Check for mail. 2204 * If we are a login shell, then we don't want to tell 2205 * about any mail file unless its been modified 2206 * after the time we started. 2207 * This prevents us from telling the user things he already 2208 * knows, since the login program insists on saying 2209 * "You have mail." 2210 */ 2211 2212 /* 2213 * The AMS version. 2214 * This version checks if the file is a directory, and if so, 2215 * tells you the number of files in it, otherwise do the old thang. 2216 * The magic "+1" in the time calculation is to compensate for 2217 * an AFS bug where directory mtimes are set to 1 second in 2218 * the future. 2219 */ 2220 2221 static void 2222 mailchk(void) 2223 { 2224 struct varent *v; 2225 Char **vp; 2226 time_t t; 2227 int intvl, cnt; 2228 struct stat stb; 2229 int new; 2230 2231 v = adrof(STRmail); 2232 if (v == NULL || v->vec == NULL) 2233 return; 2234 (void) time(&t); 2235 vp = v->vec; 2236 cnt = blklen(vp); 2237 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL; 2238 if (intvl < 1) 2239 intvl = 1; 2240 if (chktim + intvl > t) 2241 return; 2242 for (; *vp; vp++) { 2243 char *filename = short2str(*vp); 2244 char *mboxdir = filename; 2245 2246 if (stat(filename, &stb) < 0) 2247 continue; 2248 #if defined(BSDTIMES) || defined(_SEQUENT_) 2249 new = stb.st_mtime > time0.tv_sec; 2250 #else 2251 new = stb.st_mtime > seconds0; 2252 #endif 2253 if (S_ISDIR(stb.st_mode)) { 2254 DIR *mailbox; 2255 int mailcount = 0; 2256 char *tempfilename; 2257 struct stat stc; 2258 2259 tempfilename = xasprintf("%s/new", filename); 2260 2261 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) { 2262 /* 2263 * "filename/new" exists and is a directory; you are 2264 * using Qmail. 2265 */ 2266 stb = stc; 2267 #if defined(BSDTIMES) || defined(_SEQUENT_) 2268 new = stb.st_mtime > time0.tv_sec; 2269 #else 2270 new = stb.st_mtime > seconds0; 2271 #endif 2272 mboxdir = tempfilename; 2273 } 2274 2275 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) { 2276 xfree(tempfilename); 2277 continue; 2278 } 2279 2280 mailbox = opendir(mboxdir); 2281 xfree(tempfilename); 2282 if (mailbox == NULL) 2283 continue; 2284 2285 /* skip . and .. */ 2286 if (!readdir(mailbox) || !readdir(mailbox)) { 2287 (void)closedir(mailbox); 2288 continue; 2289 } 2290 2291 while (readdir(mailbox)) 2292 mailcount++; 2293 2294 (void)closedir(mailbox); 2295 if (mailcount == 0) 2296 continue; 2297 2298 if (cnt == 1) 2299 xprintf(CGETS(11, 3, "You have %d mail messages.\n"), 2300 mailcount); 2301 else 2302 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"), 2303 mailcount, filename); 2304 } 2305 else { 2306 char *type; 2307 2308 if (stb.st_size == 0 || stb.st_atime >= stb.st_mtime || 2309 (stb.st_atime <= chktim && stb.st_mtime <= chktim) || 2310 (loginsh && !new)) 2311 continue; 2312 type = strsave(new ? CGETS(11, 6, "new ") : ""); 2313 cleanup_push(type, xfree); 2314 if (cnt == 1) 2315 xprintf(CGETS(11, 5, "You have %smail.\n"), type); 2316 else 2317 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename); 2318 cleanup_until(type); 2319 } 2320 } 2321 chktim = t; 2322 } 2323 2324 /* 2325 * Extract a home directory from the password file 2326 * The argument points to a buffer where the name of the 2327 * user whose home directory is sought is currently. 2328 * We return home directory of the user, or NULL. 2329 */ 2330 Char * 2331 gethdir(const Char *home) 2332 { 2333 Char *h; 2334 2335 /* 2336 * Is it us? 2337 */ 2338 if (*home == '\0') { 2339 if ((h = varval(STRhome)) != STRNULL) 2340 return Strsave(h); 2341 else 2342 return NULL; 2343 } 2344 2345 /* 2346 * Look in the cache 2347 */ 2348 if ((h = gettilde(home)) == NULL) 2349 return NULL; 2350 else 2351 return Strsave(h); 2352 } 2353 2354 /* 2355 * Move the initial descriptors to their eventual 2356 * resting places, closing all other units. 2357 */ 2358 void 2359 initdesc(void) 2360 { 2361 #ifdef NLS_BUGS 2362 #ifdef NLS_CATALOGS 2363 nlsclose(); 2364 #endif /* NLS_CATALOGS */ 2365 #endif /* NLS_BUGS */ 2366 2367 2368 didfds = 0; /* 0, 1, 2 aren't set up */ 2369 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1); 2370 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1); 2371 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1); 2372 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1); 2373 #ifndef CLOSE_ON_EXEC 2374 didcch = 0; /* Havent closed for child */ 2375 #endif /* CLOSE_ON_EXEC */ 2376 if (SHDIAG >= 0) 2377 isdiagatty = isatty(SHDIAG); 2378 else 2379 isdiagatty = 0; 2380 if (SHDIAG >= 0) 2381 isoutatty = isatty(SHOUT); 2382 else 2383 isoutatty = 0; 2384 #ifdef NLS_BUGS 2385 #ifdef NLS_CATALOGS 2386 nlsinit(); 2387 #endif /* NLS_CATALOGS */ 2388 #endif /* NLS_BUGS */ 2389 } 2390 2391 2392 void 2393 #ifdef PROF 2394 done(int i) 2395 #else 2396 xexit(int i) 2397 #endif 2398 { 2399 #ifdef TESLA 2400 if (loginsh && do_logout) { 2401 /* this is to send hangup signal to the develcon */ 2402 /* we toggle DTR. clear dtr - sleep 1 - set dtr */ 2403 /* ioctl will return ENOTTY for pty's but we ignore it */ 2404 /* exitstat will run after disconnect */ 2405 /* we sleep for 2 seconds to let things happen in */ 2406 /* .logout and rechist() */ 2407 #ifdef TIOCCDTR 2408 (void) sleep(2); 2409 (void) ioctl(FSHTTY, TIOCCDTR, NULL); 2410 (void) sleep(1); 2411 (void) ioctl(FSHTTY, TIOCSDTR, NULL); 2412 #endif /* TIOCCDTR */ 2413 } 2414 #endif /* TESLA */ 2415 2416 { 2417 struct process *pp, *np; 2418 pid_t mypid = getpid(); 2419 /* Kill all processes marked for hup'ing */ 2420 for (pp = proclist.p_next; pp; pp = pp->p_next) { 2421 np = pp; 2422 do 2423 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp && 2424 np->p_parentid == mypid) { 2425 if (killpg(np->p_jobid, SIGHUP) != -1) { 2426 /* In case the job was suspended... */ 2427 #ifdef SIGCONT 2428 (void) killpg(np->p_jobid, SIGCONT); 2429 #endif 2430 break; 2431 } 2432 } 2433 while ((np = np->p_friends) != pp); 2434 } 2435 } 2436 untty(); 2437 #ifdef NLS_CATALOGS 2438 /* 2439 * We need to call catclose, because SVR4 leaves symlinks behind otherwise 2440 * in the catalog directories. We cannot close on a vforked() child, 2441 * because messages will stop working on the parent too. 2442 */ 2443 if (child == 0) 2444 nlsclose(); 2445 #endif /* NLS_CATALOGS */ 2446 #ifdef WINNT_NATIVE 2447 nt_cleanup(); 2448 #endif /* WINNT_NATIVE */ 2449 _exit(i); 2450 } 2451 2452 #ifndef _PATH_DEFPATH 2453 static Char ** 2454 defaultpath(void) 2455 { 2456 char *ptr; 2457 Char **blk, **blkp; 2458 struct stat stb; 2459 2460 blkp = blk = xmalloc(sizeof(Char *) * 10); 2461 2462 #ifndef NODOT 2463 # ifndef DOTLAST 2464 *blkp++ = Strsave(STRdot); 2465 # endif 2466 #endif 2467 2468 #define DIRAPPEND(a) \ 2469 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \ 2470 *blkp++ = SAVE(ptr) 2471 2472 #ifdef _PATH_LOCAL 2473 DIRAPPEND(_PATH_LOCAL); 2474 #endif 2475 2476 #ifdef _PATH_USRUCB 2477 DIRAPPEND(_PATH_USRUCB); 2478 #endif 2479 2480 #ifdef _PATH_USRBSD 2481 DIRAPPEND(_PATH_USRBSD); 2482 #endif 2483 2484 #ifdef _PATH_BIN 2485 DIRAPPEND(_PATH_BIN); 2486 #endif 2487 2488 #ifdef _PATH_USRBIN 2489 DIRAPPEND(_PATH_USRBIN); 2490 #endif 2491 2492 #undef DIRAPPEND 2493 2494 #ifndef NODOT 2495 # ifdef DOTLAST 2496 *blkp++ = Strsave(STRdot); 2497 # endif 2498 #endif 2499 *blkp = NULL; 2500 return (blk); 2501 } 2502 #endif 2503 2504 static void 2505 record(void) 2506 { 2507 if (!fast) { 2508 recdirs(NULL, adrof(STRsavedirs) != NULL); 2509 rechist(NULL, adrof(STRsavehist) != NULL); 2510 } 2511 displayHistStats("Exiting"); /* no-op unless DEBUG_HIST */ 2512 } 2513 2514 /* 2515 * Grab the tty repeatedly, and give up if we are not in the correct 2516 * tty process group. 2517 */ 2518 int 2519 grabpgrp(int fd, pid_t desired) 2520 { 2521 struct sigaction old; 2522 pid_t pgrp; 2523 size_t i; 2524 2525 for (i = 0; i < 100; i++) { 2526 if ((pgrp = tcgetpgrp(fd)) == -1) 2527 return -1; 2528 if (pgrp == desired) 2529 return 0; 2530 (void)sigaction(SIGTTIN, NULL, &old); 2531 (void)signal(SIGTTIN, SIG_DFL); 2532 (void)kill(0, SIGTTIN); 2533 (void)sigaction(SIGTTIN, &old, NULL); 2534 } 2535 errno = EPERM; 2536 return -1; 2537 } 2538