1 /* $Header: /p/tcsh/cvsroot/tcsh/sh.c,v 3.174 2011/11/29 18:38:54 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 3.174 2011/11/29 18:38:54 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; 82 83 static const char tcshstr[] = "tcsh"; 84 85 struct sigaction parintr; /* Parents interrupt catch */ 86 struct sigaction parterm; /* Parents terminate catch */ 87 88 #ifdef TESLA 89 int do_logout = 0; 90 #endif /* TESLA */ 91 92 93 int use_fork = 0; /* use fork() instead of vfork()? */ 94 95 /* 96 * Magic pointer values. Used to specify other invalid conditions aside 97 * from null. 98 */ 99 static Char INVCHAR; 100 Char *INVPTR = &INVCHAR; 101 Char **INVPPTR = &INVPTR; 102 103 static int fast = 0; 104 static int mflag = 0; 105 static int prompt = 1; 106 int enterhist = 0; 107 int tellwhat = 0; 108 time_t t_period; 109 Char *ffile = NULL; 110 int dolzero = 0; 111 int insource = 0; 112 int exitset = 0; 113 static time_t chktim; /* Time mail last checked */ 114 char *progname; 115 int tcsh; 116 117 /* 118 * This preserves the input state of the shell. It is used by 119 * st_save and st_restore to manupulate shell state. 120 */ 121 struct saved_state { 122 int insource; 123 int OLDSTD; 124 int SHIN; 125 int SHOUT; 126 int SHDIAG; 127 int intty; 128 struct whyle *whyles; 129 Char *gointr; 130 Char *arginp; 131 Char *evalp; 132 Char **evalvec; 133 Char *alvecp; 134 Char **alvec; 135 int onelflg; 136 int enterhist; 137 Char **argv; 138 Char **av; 139 Char HIST; 140 int cantell; 141 struct Bin B; 142 int justpr; 143 }; 144 145 static int srccat (Char *, Char *); 146 #ifndef WINNT_NATIVE 147 static int srcfile (const char *, int, int, Char **); 148 #else 149 int srcfile (const char *, int, int, Char **); 150 #endif /*WINNT_NATIVE*/ 151 static void srcunit (int, int, int, Char **); 152 static void mailchk (void); 153 #ifndef _PATH_DEFPATH 154 static Char **defaultpath (void); 155 #endif 156 static void record (void); 157 static void st_save (struct saved_state *, int, int, 158 Char **, Char **); 159 static void st_restore (void *); 160 161 int main (int, char **); 162 163 #ifndef LOCALEDIR 164 #define LOCALEDIR "/usr/share/locale" 165 #endif 166 167 #ifdef NLS_CATALOGS 168 static void 169 add_localedir_to_nlspath(const char *path) 170 { 171 static const char msgs_LOC[] = "/%L/LC_MESSAGES/%N.cat"; 172 static const char msgs_lang[] = "/%l/LC_MESSAGES/%N.cat"; 173 char *old; 174 char *new, *new_p; 175 size_t len; 176 int add_LOC = 1; 177 int add_lang = 1; 178 char trypath[MAXPATHLEN]; 179 struct stat st; 180 181 if (path == NULL) 182 return; 183 184 (void) xsnprintf(trypath, sizeof(trypath), "%s/en/LC_MESSAGES/tcsh.cat", 185 path); 186 if (stat(trypath, &st) == -1) 187 return; 188 189 if ((old = getenv("NLSPATH")) != NULL) 190 len = strlen(old) + 1; /* don't forget the colon. */ 191 else 192 len = 0; 193 194 len += 2 * strlen(path) + 195 sizeof(msgs_LOC) + sizeof(msgs_lang); /* includes the extra colon */ 196 197 new = new_p = xcalloc(len, 1); 198 199 if (old != NULL) { 200 size_t pathlen = strlen(path); 201 char *old_p; 202 203 (void) xsnprintf(new_p, len, "%s", old); 204 new_p += strlen(new_p); 205 len -= new_p - new; 206 207 /* Check if the paths we try to add are already present in NLSPATH. 208 If so, note it by setting the appropriate flag to 0. */ 209 for (old_p = old; old_p; old_p = strchr(old_p, ':'), 210 old_p = old_p ? old_p + 1 : NULL) { 211 if (strncmp(old_p, path, pathlen) != 0) 212 continue; 213 if (strncmp(old_p + pathlen, msgs_LOC, sizeof(msgs_LOC) - 1) == 0) 214 add_LOC = 0; 215 else if (strncmp(old_p + pathlen, msgs_lang, 216 sizeof(msgs_lang) - 1) == 0) 217 add_lang = 0; 218 } 219 } 220 221 /* Add the message catalog paths not already present to NLSPATH. */ 222 if (add_LOC || add_lang) 223 (void) xsnprintf(new_p, len, "%s%s%s%s%s%s", 224 old ? ":" : "", 225 add_LOC ? path : "", add_LOC ? msgs_LOC : "", 226 add_LOC && add_lang ? ":" : "", 227 add_lang ? path : "", add_lang ? msgs_lang : ""); 228 229 tsetenv(STRNLSPATH, str2short(new)); 230 free(new); 231 } 232 #endif 233 234 int 235 main(int argc, char **argv) 236 { 237 int batch = 0; 238 volatile int nexececho = 0; 239 int nofile = 0; 240 volatile int nverbose = 0; 241 volatile int rdirs = 0; 242 int quitit = 0; 243 Char *cp; 244 #ifdef AUTOLOGOUT 245 Char *cp2; 246 #endif 247 char *tcp, *ttyn; 248 int f, reenter; 249 char **tempv; 250 int osetintr; 251 struct sigaction oparintr; 252 253 (void)memset(&reslab, 0, sizeof(reslab)); 254 #ifdef WINNT_NATIVE 255 nt_init(); 256 #endif /* WINNT_NATIVE */ 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(); 275 276 #ifdef MALLOC_TRACE 277 mal_setstatsfile(fdopen(dmove(xopen("/tmp/tcsh.trace", 278 O_WRONLY|O_CREAT|O_LARGEFILE, 0666), 25), "w")); 279 mal_trace(1); 280 #endif /* MALLOC_TRACE */ 281 282 #if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX) 283 # ifdef _SC_CLK_TCK 284 clk_tck = (clock_t) sysconf(_SC_CLK_TCK); 285 # else /* ! _SC_CLK_TCK */ 286 # ifdef CLK_TCK 287 clk_tck = CLK_TCK; 288 # else /* !CLK_TCK */ 289 clk_tck = HZ; 290 # endif /* CLK_TCK */ 291 # endif /* _SC_CLK_TCK */ 292 #endif /* !BSDTIMES && POSIX */ 293 294 settimes(); /* Immed. estab. timing base */ 295 #ifdef TESLA 296 do_logout = 0; 297 #endif /* TESLA */ 298 299 /* 300 * Make sure we have 0, 1, 2 open 301 * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr) 302 */ 303 { 304 do 305 if ((f = xopen(_PATH_DEVNULL, O_RDONLY|O_LARGEFILE)) == -1 && 306 (f = xopen("/", O_RDONLY|O_LARGEFILE)) == -1) 307 exit(1); 308 while (f < 3); 309 xclose(f); 310 } 311 312 osinit(); /* Os dependent initialization */ 313 314 315 { 316 char *t; 317 318 t = strrchr(argv[0], '/'); 319 #ifdef WINNT_NATIVE 320 { 321 char *s = strrchr(argv[0], '\\'); 322 if (s) 323 t = s; 324 } 325 #endif /* WINNT_NATIVE */ 326 t = t ? t + 1 : argv[0]; 327 if (*t == '-') t++; 328 progname = strsave((t && *t) ? t : tcshstr); /* never want a null */ 329 tcsh = strncmp(progname, tcshstr, sizeof(tcshstr) - 1) == 0; 330 } 331 332 /* 333 * Initialize non constant strings 334 */ 335 #ifdef _PATH_BSHELL 336 STR_BSHELL = SAVE(_PATH_BSHELL); 337 #endif 338 #ifdef _PATH_TCSHELL 339 STR_SHELLPATH = SAVE(_PATH_TCSHELL); 340 #else 341 # ifdef _PATH_CSHELL 342 STR_SHELLPATH = SAVE(_PATH_CSHELL); 343 # endif 344 #endif 345 STR_WORD_CHARS = SAVE(WORD_CHARS); 346 347 HIST = '!'; 348 HISTSUB = '^'; 349 PRCH = tcsh ? '>' : '%'; /* to replace %# in $prompt for normal users */ 350 PRCHROOT = '#'; /* likewise for root */ 351 word_chars = STR_WORD_CHARS; 352 bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */ 353 anyerror = 1; /* for compatibility */ 354 setcopy(STRanyerror, STRNULL, VAR_READWRITE); 355 356 /* Default history size to 100 */ 357 setcopy(STRhistory, str2short("100"), VAR_READWRITE); 358 359 tempv = argv; 360 ffile = SAVE(tempv[0]); 361 dolzero = 0; 362 if (eq(ffile, STRaout)) /* A.out's are quittable */ 363 quitit = 1; 364 uid = getuid(); 365 gid = getgid(); 366 euid = geteuid(); 367 egid = getegid(); 368 /* 369 * We are a login shell if: 1. we were invoked as -<something> with 370 * optional arguments 2. or we were invoked only with the -l flag 371 */ 372 loginsh = (**tempv == '-') || (argc == 2 && 373 tempv[1][0] == '-' && tempv[1][1] == 'l' && 374 tempv[1][2] == '\0'); 375 #ifdef _VMS_POSIX 376 /* No better way to find if we are a login shell */ 377 if (!loginsh) { 378 loginsh = (argc == 1 && getppid() == 1); 379 **tempv = '-'; /* Avoid giving VMS an acidic stomach */ 380 } 381 #endif /* _VMS_POSIX */ 382 383 if (loginsh && **tempv != '-') { 384 char *argv0; 385 386 /* 387 * Mangle the argv space 388 */ 389 tempv[1][0] = '\0'; 390 tempv[1][1] = '\0'; 391 tempv[1] = NULL; 392 argv0 = strspl("-", *tempv); 393 *tempv = argv0; 394 argc--; 395 } 396 if (loginsh) { 397 (void) time(&chktim); 398 setNS(STRloginsh); 399 } 400 401 NoNLSRebind = getenv("NOREBIND") != NULL; 402 #ifdef NLS 403 # ifdef SETLOCALEBUG 404 dont_free = 1; 405 # endif /* SETLOCALEBUG */ 406 (void) setlocale(LC_ALL, ""); 407 # ifdef LC_COLLATE 408 (void) setlocale(LC_COLLATE, ""); 409 # endif 410 # ifdef SETLOCALEBUG 411 dont_free = 0; 412 # endif /* SETLOCALEBUG */ 413 # ifdef STRCOLLBUG 414 fix_strcoll_bug(); 415 # endif /* STRCOLLBUG */ 416 417 /* 418 * On solaris ISO8859-1 contains no printable characters in the upper half 419 * so we need to test only for MB_CUR_MAX == 1, otherwise for multi-byte 420 * locales we are always AsciiOnly == 0. 421 */ 422 if (MB_CUR_MAX == 1) { 423 int k; 424 425 for (k = 0200; k <= 0377 && !isprint(CTL_ESC(k)); k++) 426 continue; 427 AsciiOnly = k > 0377; 428 } else 429 AsciiOnly = 0; 430 #else 431 AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL; 432 #endif /* NLS */ 433 if (MapsAreInited && !NLSMapsAreInited) 434 ed_InitNLSMaps(); 435 ResetArrowKeys(); 436 437 /* 438 * Initialize for periodic command intervals. Also, initialize the dummy 439 * tty list for login-watch. 440 */ 441 (void) time(&t_period); 442 #ifndef HAVENOUTMP 443 initwatch(); 444 #endif /* !HAVENOUTMP */ 445 446 #if defined(alliant) 447 /* 448 * From: Jim Pace <jdp@research.att.com> 449 * tcsh does not work properly on the alliants through an rlogin session. 450 * The shell generally hangs. Also, reference to the controlling terminal 451 * does not work ( ie: echo foo > /dev/tty ). 452 * 453 * A security feature was added to rlogind affecting FX/80's Concentrix 454 * from revision 5.5.xx upwards (through 5.7 where this fix was implemented) 455 * This security change also affects the FX/2800 series. 456 * The security change to rlogind requires the process group of an rlogin 457 * session become disassociated with the tty in rlogind. 458 * 459 * The changes needed are: 460 * 1. set the process group 461 * 2. reenable the control terminal 462 */ 463 if (loginsh && isatty(SHIN)) { 464 ttyn = ttyname(SHIN); 465 xclose(SHIN); 466 SHIN = xopen(ttyn, O_RDWR|O_LARGEFILE); 467 shpgrp = getpid(); 468 (void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp); 469 (void) setpgid(0, shpgrp); 470 } 471 #endif /* alliant */ 472 473 /* 474 * Move the descriptors to safe places. The variable didfds is 0 while we 475 * have only FSH* to work with. When didfds is true, we have 0,1,2 and 476 * prefer to use these. 477 */ 478 initdesc(); 479 480 /* 481 * Get and set the tty now 482 */ 483 if ((ttyn = ttyname(SHIN)) != NULL) { 484 /* 485 * Could use rindex to get rid of other possible path components, but 486 * hpux preserves the subdirectory /pty/ when storing the tty name in 487 * utmp, so we keep it too. 488 */ 489 if (strncmp(ttyn, "/dev/", 5) == 0) 490 setv(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE); 491 else 492 setv(STRtty, cp = SAVE(ttyn), VAR_READWRITE); 493 } 494 else 495 setv(STRtty, cp = SAVE(""), VAR_READWRITE); 496 /* 497 * Initialize the shell variables. ARGV and PROMPT are initialized later. 498 * STATUS is also munged in several places. CHILD is munged when 499 * forking/waiting 500 */ 501 502 /* 503 * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and 504 * on shells running as root. Out of these, autologout should NOT be set 505 * for any psudo-terminals (this catches most window systems) and not for 506 * any terminal running X windows. 507 * 508 * At Ohio State, we have had problems with a user having his X session 509 * drop out from under him (on a Sun) because the shell in his master 510 * xterm timed out and exited. 511 * 512 * Really, this should be done with a program external to the shell, that 513 * watches for no activity (and NO running programs, such as dump) on a 514 * terminal for a long peroid of time, and then SIGHUPS the shell on that 515 * terminal. 516 * 517 * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things 518 * allways first check to see if loginsh or really root, then do things 519 * with ttyname() 520 * 521 * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the 522 * value of cp before using it! ("root can rsh too") 523 * 524 * PWP: keep the nested ifs; the order of the tests matters and a good 525 * (smart) C compiler might re-arange things wrong. 526 */ 527 #ifdef AUTOLOGOUT 528 # ifdef convex 529 if (uid == 0) 530 /* root always has a 15 minute autologout */ 531 setcopy(STRautologout, STRrootdefautologout, VAR_READWRITE); 532 else 533 if (loginsh) 534 /* users get autologout set to 0 */ 535 setcopy(STRautologout, STR0, VAR_READWRITE); 536 # else /* convex */ 537 if (loginsh || (uid == 0)) { 538 if (*cp) { 539 /* only for login shells or root and we must have a tty */ 540 if (((cp2 = Strrchr(cp, (Char) '/')) != NULL) && 541 (Strncmp(cp, STRptssl, 3) != 0)) { 542 cp2 = cp2 + 1; 543 } 544 else 545 cp2 = cp; 546 if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) || 547 Strstr(cp, STRptssl) != NULL)) { 548 if (getenv("DISPLAY") == NULL) { 549 /* NOT on X window shells */ 550 setcopy(STRautologout, STRdefautologout, VAR_READWRITE); 551 } 552 } 553 } 554 } 555 # endif /* convex */ 556 #endif /* AUTOLOGOUT */ 557 558 sigset_interrupting(SIGALRM, queue_alrmcatch); 559 560 setcopy(STRstatus, STR0, VAR_READWRITE); 561 562 /* 563 * get and set machine specific environment variables 564 */ 565 getmachine(); 566 567 568 /* 569 * Publish the selected echo style 570 */ 571 #if ECHO_STYLE != BSD_ECHO 572 if (tcsh) { 573 # if ECHO_STYLE == NONE_ECHO 574 setcopy(STRecho_style, STRnone, VAR_READWRITE); 575 # endif /* ECHO_STYLE == NONE_ECHO */ 576 # if ECHO_STYLE == SYSV_ECHO 577 setcopy(STRecho_style, STRsysv, VAR_READWRITE); 578 # endif /* ECHO_STYLE == SYSV_ECHO */ 579 # if ECHO_STYLE == BOTH_ECHO 580 setcopy(STRecho_style, STRboth, VAR_READWRITE); 581 # endif /* ECHO_STYLE == BOTH_ECHO */ 582 } else 583 #endif /* ECHO_STYLE != BSD_ECHO */ 584 setcopy(STRecho_style, STRbsd, VAR_READWRITE); 585 586 /* 587 * increment the shell level. 588 */ 589 shlvl(1); 590 591 if ((tcp = getenv("HOME")) != NULL) 592 cp = quote(SAVE(tcp)); 593 else 594 #ifdef __ANDROID__ 595 /* On Android, $HOME usually isn't set, so we can't load user RC files. 596 Check for the environment variable EXTERNAL_STORAGE, which contains 597 the mount point of the external storage (SD card, mostly). If 598 EXTERNAL_STORAGE isn't set fall back to "/sdcard". */ 599 if ((tcp = getenv("EXTERNAL_STORAGE")) != NULL) 600 cp = quote(SAVE(tcp)); 601 else 602 cp = quote(SAVE("/sdcard")); 603 #else 604 cp = NULL; 605 #endif 606 607 if (cp == NULL) 608 fast = 1; /* No home -> can't read scripts */ 609 else 610 setv(STRhome, cp, VAR_READWRITE); 611 612 dinit(cp); /* dinit thinks that HOME == cwd in a login 613 * shell */ 614 /* 615 * Grab other useful things from the environment. Should we grab 616 * everything?? 617 */ 618 { 619 char *cln, *cus, *cgr; 620 struct passwd *pw; 621 struct group *gr; 622 623 624 #ifdef apollo 625 int oid = getoid(); 626 627 setv(STRoid, Itoa(oid, 0, 0), VAR_READWRITE); 628 #endif /* apollo */ 629 630 setv(STReuid, Itoa(euid, 0, 0), VAR_READWRITE); 631 if ((pw = xgetpwuid(euid)) == NULL) 632 setcopy(STReuser, STRunknown, VAR_READWRITE); 633 else 634 setcopy(STReuser, str2short(pw->pw_name), VAR_READWRITE); 635 636 setv(STRuid, Itoa(uid, 0, 0), VAR_READWRITE); 637 638 setv(STRgid, Itoa(gid, 0, 0), VAR_READWRITE); 639 640 cln = getenv("LOGNAME"); 641 cus = getenv("USER"); 642 if (cus != NULL) 643 setv(STRuser, quote(SAVE(cus)), VAR_READWRITE); 644 else if (cln != NULL) 645 setv(STRuser, quote(SAVE(cln)), VAR_READWRITE); 646 else if ((pw = xgetpwuid(uid)) == NULL) 647 setcopy(STRuser, STRunknown, VAR_READWRITE); 648 else 649 setcopy(STRuser, str2short(pw->pw_name), VAR_READWRITE); 650 if (cln == NULL) 651 tsetenv(STRLOGNAME, varval(STRuser)); 652 if (cus == NULL) 653 tsetenv(STRKUSER, varval(STRuser)); 654 655 cgr = getenv("GROUP"); 656 if (cgr != NULL) 657 setv(STRgroup, quote(SAVE(cgr)), VAR_READWRITE); 658 else if ((gr = xgetgrgid(gid)) == NULL) 659 setcopy(STRgroup, STRunknown, VAR_READWRITE); 660 else 661 setcopy(STRgroup, str2short(gr->gr_name), VAR_READWRITE); 662 if (cgr == NULL) 663 tsetenv(STRKGROUP, varval(STRgroup)); 664 } 665 666 /* 667 * HOST may be wrong, since rexd transports the entire environment on sun 668 * 3.x Just set it again 669 */ 670 { 671 char cbuff[MAXHOSTNAMELEN]; 672 673 if (gethostname(cbuff, sizeof(cbuff)) >= 0) { 674 cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */ 675 tsetenv(STRHOST, str2short(cbuff)); 676 } 677 else 678 tsetenv(STRHOST, STRunknown); 679 } 680 681 682 #ifdef REMOTEHOST 683 /* 684 * Try to determine the remote host we were logged in from. 685 */ 686 remotehost(); 687 #endif /* REMOTEHOST */ 688 689 #ifdef apollo 690 if ((tcp = getenv("SYSTYPE")) == NULL) 691 tcp = "bsd4.3"; 692 tsetenv(STRSYSTYPE, quote(str2short(tcp))); 693 #endif /* apollo */ 694 695 /* 696 * set editing on by default, unless running under Emacs as an inferior 697 * shell. 698 * We try to do this intelligently. If $TERM is available, then it 699 * should determine if we should edit or not. $TERM is preserved 700 * across rlogin sessions, so we will not get confused if we rlogin 701 * under an emacs shell. Another advantage is that if we run an 702 * xterm under an emacs shell, then the $TERM will be set to 703 * xterm, so we are going to want to edit. Unfortunately emacs 704 * does not restore all the tty modes, so xterm is not very well 705 * set up. But this is not the shell's fault. 706 * Also don't edit if $TERM == wm, for when we're running under an ATK app. 707 * Finally, emacs compiled under terminfo, sets the terminal to dumb, 708 * so disable editing for that too. 709 * 710 * Unfortunately, in some cases the initial $TERM setting is "unknown", 711 * "dumb", or "network" which is then changed in the user's startup files. 712 * We fix this by setting noediting here if $TERM is unknown/dumb and 713 * if noediting is set, we switch on editing if $TERM is changed. 714 */ 715 if ((tcp = getenv("TERM")) != NULL) { 716 setv(STRterm, quote(SAVE(tcp)), VAR_READWRITE); 717 noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 || 718 strcmp(tcp, "network") == 0; 719 editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 && 720 !noediting; 721 } 722 else { 723 noediting = 0; 724 editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0); 725 } 726 727 /* 728 * The 'edit' variable is either set or unset. It doesn't 729 * need a value. Making it 'emacs' might be confusing. 730 */ 731 if (editing) 732 setNS(STRedit); 733 734 735 /* 736 * still more mutability: make the complete routine automatically add the 737 * suffix of file names... 738 */ 739 setNS(STRaddsuffix); 740 741 /* 742 * Compatibility with tcsh >= 6.12 by default 743 */ 744 setNS(STRcsubstnonl); 745 746 /* 747 * Random default kill ring size 748 */ 749 setcopy(STRkillring, str2short("30"), VAR_READWRITE); 750 751 /* 752 * Re-initialize path if set in environment 753 */ 754 if ((tcp = getenv("PATH")) == NULL) 755 #ifdef _PATH_DEFPATH 756 importpath(str2short(_PATH_DEFPATH)); 757 #else /* !_PATH_DEFPATH */ 758 setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE); 759 #endif /* _PATH_DEFPATH */ 760 else 761 /* Importpath() allocates memory for the path, and the 762 * returned pointer from SAVE() was discarded, so 763 * this was a memory leak.. (sg) 764 * 765 * importpath(SAVE(tcp)); 766 */ 767 importpath(str2short(tcp)); 768 769 770 { 771 /* If the SHELL environment variable ends with "tcsh", set 772 * STRshell to the same path. This is to facilitate using 773 * the executable in environments where the compiled-in 774 * default isn't appropriate (sg). 775 */ 776 777 size_t sh_len = 0; 778 779 if ((tcp = getenv("SHELL")) != NULL) { 780 sh_len = strlen(tcp); 781 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) || 782 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0)) 783 setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE); 784 else 785 sh_len = 0; 786 } 787 if (sh_len == 0) 788 setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE); 789 } 790 791 #ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */ 792 if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL) 793 tcp = "SHELL"; 794 tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp))); 795 #endif /* _OSD_POSIX */ 796 797 #ifdef COLOR_LS_F 798 if ((tcp = getenv("LS_COLORS")) != NULL) 799 parseLS_COLORS(str2short(tcp)); 800 #endif /* COLOR_LS_F */ 801 802 doldol = putn((tcsh_number_t)getpid()); /* For $$ */ 803 #ifdef WINNT_NATIVE 804 { 805 char *tmp; 806 Char *tmp2; 807 if ((tmp = getenv("TMP")) != NULL) { 808 tmp = xasprintf("%s/%s", tmp, "sh"); 809 tmp2 = SAVE(tmp); 810 xfree(tmp); 811 } 812 else { 813 tmp2 = SAVE(""); 814 } 815 shtemp = Strspl(tmp2, doldol); /* For << */ 816 xfree(tmp2); 817 } 818 #else /* !WINNT_NATIVE */ 819 #ifdef HAVE_MKSTEMP 820 { 821 char *tmpdir = getenv ("TMPDIR"); 822 if (!tmpdir) 823 tmpdir = "/tmp"; 824 shtemp = Strspl(SAVE(tmpdir), SAVE("/sh" TMP_TEMPLATE)); /* For << */ 825 } 826 #else /* !HAVE_MKSTEMP */ 827 shtemp = Strspl(STRtmpsh, doldol); /* For << */ 828 #endif /* HAVE_MKSTEMP */ 829 #endif /* WINNT_NATIVE */ 830 831 /* 832 * Record the interrupt states from the parent process. If the parent is 833 * non-interruptible our hand must be forced or we (and our children) won't 834 * be either. Our children inherit termination from our parent. We catch it 835 * only if we are the login shell. 836 */ 837 sigaction(SIGINT, NULL, &parintr); 838 sigaction(SIGTERM, NULL, &parterm); 839 840 841 #ifdef TCF 842 /* Enable process migration on ourselves and our progeny */ 843 (void) signal(SIGMIGRATE, SIG_DFL); 844 #endif /* TCF */ 845 846 /* 847 * dspkanji/dspmbyte autosetting 848 */ 849 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */ 850 #if defined(DSPMBYTE) 851 #if defined(NLS) && defined(LC_CTYPE) 852 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR)) 853 #else 854 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) 855 #endif 856 { 857 autoset_dspmbyte(str2short(tcp)); 858 } 859 #if defined(WINNT_NATIVE) 860 else if (!adrof(CHECK_MBYTEVAR)) 861 nt_autoset_dspmbyte(); 862 #endif /* WINNT_NATIVE */ 863 #endif 864 #if defined(AUTOSET_KANJI) 865 # if defined(NLS) && defined(LC_CTYPE) 866 if (setlocale(LC_CTYPE, NULL) != NULL || getenv("LANG") != NULL) 867 # else 868 if (getenv("LANG") != NULL) 869 # endif 870 autoset_kanji(); 871 #endif /* AUTOSET_KANJI */ 872 fix_version(); /* publish the shell version */ 873 874 if (argc > 1 && strcmp(argv[1], "--version") == 0) { 875 xprintf("%S\n", varval(STRversion)); 876 xexit(0); 877 } 878 if (argc > 1 && strcmp(argv[1], "--help") == 0) { 879 xprintf("%S\n\n", varval(STRversion)); 880 xprintf("%s", CGETS(11, 8, HELP_STRING)); 881 xexit(0); 882 } 883 /* 884 * Process the arguments. 885 * 886 * Note that processing of -v/-x is actually delayed till after script 887 * processing. 888 * 889 * We set the first character of our name to be '-' if we are a shell 890 * running interruptible commands. Many programs which examine ps'es 891 * use this to filter such shells out. 892 */ 893 argc--, tempv++; 894 while (argc > 0 && (tcp = tempv[0])[0] == '-' && 895 *++tcp != '\0' && !batch) { 896 do 897 switch (*tcp++) { 898 899 case 0: /* - Interruptible, no prompt */ 900 prompt = 0; 901 setintr = 1; 902 nofile = 1; 903 break; 904 905 case 'b': /* -b Next arg is input file */ 906 batch = 1; 907 break; 908 909 case 'c': /* -c Command input from arg */ 910 if (argc == 1) 911 xexit(0); 912 argc--, tempv++; 913 #ifdef M_XENIX 914 /* Xenix Vi bug: 915 it relies on a 7 bit environment (/bin/sh), so it 916 pass ascii arguments with the 8th bit set */ 917 if (!strcmp(argv[0], "sh")) 918 { 919 char *p; 920 921 for (p = tempv[0]; *p; ++p) 922 *p &= ASCII; 923 } 924 #endif 925 arginp = SAVE(tempv[0]); 926 927 /* 928 * we put the command into a variable 929 */ 930 if (arginp != NULL) 931 setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE); 932 933 /* 934 * * Give an error on -c arguments that end in * backslash to 935 * ensure that you don't make * nonportable csh scripts. 936 */ 937 { 938 int count; 939 940 cp = Strend(arginp); 941 count = 0; 942 while (cp > arginp && *--cp == '\\') 943 ++count; 944 if ((count & 1) != 0) { 945 exiterr = 1; 946 stderror(ERR_ARGC); 947 } 948 } 949 prompt = 0; 950 nofile = 1; 951 break; 952 case 'd': /* -d Load directory stack from file */ 953 rdirs = 1; 954 break; 955 956 #ifdef apollo 957 case 'D': /* -D Define environment variable */ 958 { 959 Char *dp; 960 961 cp = str2short(tcp); 962 if (dp = Strchr(cp, '=')) { 963 *dp++ = '\0'; 964 tsetenv(cp, dp); 965 } 966 else 967 tsetenv(cp, STRNULL); 968 } 969 *tcp = '\0'; /* done with this argument */ 970 break; 971 #endif /* apollo */ 972 973 case 'e': /* -e Exit on any error */ 974 exiterr = 1; 975 break; 976 977 case 'f': /* -f Fast start */ 978 fast = 1; 979 break; 980 981 case 'i': /* -i Interactive, even if !intty */ 982 intact = 1; 983 nofile = 1; 984 break; 985 986 case 'm': /* -m read .cshrc (from su) */ 987 mflag = 1; 988 break; 989 990 case 'n': /* -n Don't execute */ 991 noexec = 1; 992 break; 993 994 case 'q': /* -q (Undoc'd) ... die on quit */ 995 quitit = 1; 996 break; 997 998 case 's': /* -s Read from std input */ 999 nofile = 1; 1000 break; 1001 1002 case 't': /* -t Read one line from input */ 1003 onelflg = 2; 1004 prompt = 0; 1005 nofile = 1; 1006 break; 1007 1008 case 'v': /* -v Echo hist expanded input */ 1009 nverbose = 1; /* ... later */ 1010 break; 1011 1012 case 'x': /* -x Echo just before execution */ 1013 nexececho = 1; /* ... later */ 1014 break; 1015 1016 case 'V': /* -V Echo hist expanded input */ 1017 setNS(STRverbose); /* NOW! */ 1018 break; 1019 1020 case 'X': /* -X Echo just before execution */ 1021 setNS(STRecho); /* NOW! */ 1022 break; 1023 1024 case 'F': 1025 /* 1026 * This will cause children to be created using fork instead of 1027 * vfork. 1028 */ 1029 use_fork = 1; 1030 break; 1031 1032 case ' ': 1033 case '\t': 1034 case '\r': 1035 case '\n': 1036 /* 1037 * for O/S's that don't do the argument parsing right in 1038 * "#!/foo -f " scripts 1039 */ 1040 break; 1041 1042 default: /* Unknown command option */ 1043 exiterr = 1; 1044 stderror(ERR_TCSHUSAGE, tcp-1, progname); 1045 break; 1046 1047 } while (*tcp); 1048 tempv++, argc--; 1049 } 1050 1051 if (quitit) /* With all due haste, for debugging */ 1052 (void) signal(SIGQUIT, SIG_DFL); 1053 1054 /* 1055 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining 1056 * arguments the first of them is the name of a shell file from which to 1057 * read commands. 1058 */ 1059 if (nofile == 0 && argc > 0) { 1060 nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE); 1061 if (nofile < 0) { 1062 child = 1; /* So this ... */ 1063 /* ... doesn't return */ 1064 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 1065 } 1066 xfree(ffile); 1067 dolzero = 1; 1068 ffile = SAVE(tempv[0]); 1069 /* 1070 * Replace FSHIN. Handle /dev/std{in,out,err} specially 1071 * since once they are closed we cannot open them again. 1072 * In that case we use our own saved descriptors 1073 */ 1074 if ((SHIN = dmove(nofile, FSHIN)) < 0) 1075 switch(nofile) { 1076 case 0: 1077 SHIN = FSHIN; 1078 break; 1079 case 1: 1080 SHIN = FSHOUT; 1081 break; 1082 case 2: 1083 SHIN = FSHDIAG; 1084 break; 1085 default: 1086 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 1087 break; 1088 } 1089 (void) close_on_exec(SHIN, 1); 1090 prompt = 0; 1091 /* argc not used any more */ tempv++; 1092 } 1093 1094 /* 1095 * Call to closem() used to be part of initdesc(). Now called below where 1096 * the script name argument has become stdin. Kernel may have used a file 1097 * descriptor to hold the name of the script (setuid case) and this name 1098 * mustn't be lost by closing the fd too soon. 1099 */ 1100 closem(); 1101 1102 /* 1103 * Consider input a tty if it really is or we are interactive. but not for 1104 * editing (christos) 1105 */ 1106 if (!(intty = isatty(SHIN))) { 1107 if (adrof(STRedit)) 1108 unsetv(STRedit); 1109 editing = 0; 1110 } 1111 intty |= intact; 1112 #ifndef convex 1113 if (intty || (intact && isatty(SHOUT))) { 1114 if (!batch && (uid != euid || gid != egid)) { 1115 errno = EACCES; 1116 child = 1; /* So this ... */ 1117 /* ... doesn't return */ 1118 stderror(ERR_SYSTEM, progname, strerror(errno)); 1119 } 1120 } 1121 #endif /* convex */ 1122 isoutatty = isatty(SHOUT); 1123 isdiagatty = isatty(SHDIAG); 1124 /* 1125 * Decide whether we should play with signals or not. If we are explicitly 1126 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the 1127 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx") 1128 * Note that in only the login shell is it likely that parent may have set 1129 * signals to be ignored 1130 */ 1131 if (loginsh || intact || (intty && isatty(SHOUT))) 1132 setintr = 1; 1133 settell(); 1134 /* 1135 * Save the remaining arguments in argv. 1136 */ 1137 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE); 1138 1139 /* 1140 * Set up the prompt. 1141 */ 1142 if (prompt) { 1143 setcopy(STRprompt, STRdefprompt, VAR_READWRITE); 1144 /* that's a meta-questionmark */ 1145 setcopy(STRprompt2, STRmquestion, VAR_READWRITE); 1146 setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE); 1147 } 1148 1149 /* 1150 * If we are an interactive shell, then start fiddling with the signals; 1151 * this is a tricky game. 1152 */ 1153 shpgrp = mygetpgrp(); 1154 opgrp = tpgrp = -1; 1155 if (setintr) { 1156 struct sigaction osig; 1157 1158 **argv = '-'; 1159 if (!quitit) /* Wary! */ 1160 (void) signal(SIGQUIT, SIG_IGN); 1161 pintr_disabled = 1; 1162 sigset_interrupting(SIGINT, queue_pintr); 1163 (void) signal(SIGTERM, SIG_IGN); 1164 1165 /* 1166 * No reason I can see not to save history on all these events.. 1167 * Most usual occurrence is in a window system, where we're not a login 1168 * shell, but might as well be... (sg) 1169 * But there might be races when lots of shells exit together... 1170 * [this is also incompatible]. 1171 * We have to be mre careful here. If the parent wants to 1172 * ignore the signals then we leave them untouched... 1173 * We also only setup the handlers for shells that are trully 1174 * interactive. 1175 */ 1176 sigaction(SIGHUP, NULL, &osig); 1177 if (loginsh || osig.sa_handler != SIG_IGN) 1178 /* exit processing on HUP */ 1179 sigset_interrupting(SIGHUP, queue_phup); 1180 #ifdef SIGXCPU 1181 sigaction(SIGXCPU, NULL, &osig); 1182 if (loginsh || osig.sa_handler != SIG_IGN) 1183 /* exit processing on XCPU */ 1184 sigset_interrupting(SIGXCPU, queue_phup); 1185 #endif 1186 #ifdef SIGXFSZ 1187 sigaction(SIGXFSZ, NULL, &osig); 1188 if (loginsh || osig.sa_handler != SIG_IGN) 1189 /* exit processing on XFSZ */ 1190 sigset_interrupting(SIGXFSZ, queue_phup); 1191 #endif 1192 1193 if (quitit == 0 && arginp == 0) { 1194 #ifdef SIGTSTP 1195 (void) signal(SIGTSTP, SIG_IGN); 1196 #endif 1197 #ifdef SIGTTIN 1198 (void) signal(SIGTTIN, SIG_IGN); 1199 #endif 1200 #ifdef SIGTTOU 1201 (void) signal(SIGTTOU, SIG_IGN); 1202 #endif 1203 /* 1204 * Wait till in foreground, in case someone stupidly runs csh & 1205 * dont want to try to grab away the tty. 1206 */ 1207 if (isatty(FSHDIAG)) 1208 f = FSHDIAG; 1209 else if (isatty(FSHOUT)) 1210 f = FSHOUT; 1211 else if (isatty(OLDSTD)) 1212 f = OLDSTD; 1213 else 1214 f = -1; 1215 1216 #ifdef NeXT 1217 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */ 1218 if (shpgrp == 0) { 1219 shpgrp = getpid(); 1220 (void) setpgid(0, shpgrp); 1221 (void) tcsetpgrp(f, shpgrp); 1222 } 1223 #endif /* NeXT */ 1224 #ifdef BSDJOBS /* if we have tty job control */ 1225 if (grabpgrp(f, shpgrp) != -1) { 1226 /* 1227 * Thanks to Matt Day for the POSIX references, and to 1228 * Paul Close for the SGI clarification. 1229 */ 1230 if (setdisc(f) != -1) { 1231 opgrp = shpgrp; 1232 shpgrp = getpid(); 1233 tpgrp = shpgrp; 1234 if (tcsetpgrp(f, shpgrp) == -1) { 1235 /* 1236 * On hpux 7.03 this fails with EPERM. This happens on 1237 * the 800 when opgrp != shpgrp at this point. (we were 1238 * forked from a non job control shell) 1239 * POSIX 7.2.4, says we failed because the process 1240 * group specified did not belong to a process 1241 * in the same session with the tty. So we set our 1242 * process group and try again. 1243 */ 1244 if (setpgid(0, shpgrp) == -1) { 1245 xprintf("setpgid:"); 1246 goto notty; 1247 } 1248 if (tcsetpgrp(f, shpgrp) == -1) { 1249 xprintf("tcsetpgrp:"); 1250 goto notty; 1251 } 1252 } 1253 /* 1254 * We check the process group now. If it is the same, then 1255 * we don't need to set it again. On hpux 7.0 on the 300's 1256 * if we set it again it fails with EPERM. This is the 1257 * correct behavior according to POSIX 4.3.3 if the process 1258 * was a session leader . 1259 */ 1260 else if (shpgrp != mygetpgrp()) { 1261 if(setpgid(0, shpgrp) == -1) { 1262 xprintf("setpgid:"); 1263 goto notty; 1264 } 1265 } 1266 #ifdef IRIS4D 1267 /* 1268 * But on irix 3.3 we need to set it again, even if it is 1269 * the same. We do that to tell the system that we 1270 * need BSD process group compatibility. 1271 */ 1272 else 1273 (void) setpgid(0, shpgrp); 1274 #endif 1275 (void) close_on_exec(dcopy(f, FSHTTY), 1); 1276 } 1277 else 1278 tpgrp = -1; 1279 } 1280 if (tpgrp == -1) { 1281 notty: 1282 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"), 1283 strerror(errno)); 1284 xprintf("%s", 1285 CGETS(11, 2, "Thus no job control in this shell.\n")); 1286 /* 1287 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't 1288 * have access to tty, disable editing too 1289 */ 1290 if (adrof(STRedit)) 1291 unsetv(STRedit); 1292 editing = 0; 1293 } 1294 #else /* BSDJOBS */ /* don't have job control, so frotz it */ 1295 tpgrp = -1; 1296 #endif /* BSDJOBS */ 1297 } 1298 } 1299 if (setintr == 0 && parintr.sa_handler == SIG_DFL) 1300 setintr = 1; 1301 1302 /* 1303 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the 1304 * handler is installed with signal(2) or sigset(2). sigaction(2) must 1305 * be used instead. 1306 * 1307 * David Dawes (dawes@physics.su.oz.au) Sept 1991 1308 */ 1309 sigset_interrupting(SIGCHLD, queue_pchild); 1310 1311 if (intty && !arginp) 1312 (void) ed_Setup(editing);/* Get the tty state, and set defaults */ 1313 /* Only alter the tty state if editing */ 1314 1315 /* 1316 * Set an exit here in case of an interrupt or error reading the shell 1317 * start-up scripts. 1318 */ 1319 osetintr = setintr; 1320 oparintr = parintr; 1321 (void)cleanup_push_mark(); /* There is no outer handler */ 1322 if (setexit() != 0) /* PWP */ 1323 reenter = 1; 1324 else 1325 reenter = 0; 1326 exitset++; 1327 haderr = 0; /* In case second time through */ 1328 if (!fast && reenter == 0) { 1329 /* Will have varval(STRhome) here because set fast if don't */ 1330 { 1331 pintr_disabled++; 1332 cleanup_push(&pintr_disabled, disabled_cleanup); 1333 setintr = 0;/*FIXRESET:cleanup*/ 1334 /* onintr in /etc/ files has no effect */ 1335 parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/ 1336 #ifdef LOGINFIRST 1337 #ifdef _PATH_DOTLOGIN 1338 if (loginsh) 1339 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1340 #endif 1341 #endif 1342 1343 #ifdef _PATH_DOTCSHRC 1344 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL); 1345 #endif 1346 if (!arginp && !onelflg && !havhash) 1347 dohash(NULL,NULL); 1348 #ifndef LOGINFIRST 1349 #ifdef _PATH_DOTLOGIN 1350 if (loginsh) 1351 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1352 #endif 1353 #endif 1354 cleanup_until(&pintr_disabled); 1355 setintr = osetintr; 1356 parintr = oparintr; 1357 } 1358 #ifdef LOGINFIRST 1359 if (loginsh) 1360 (void) srccat(varval(STRhome), STRsldotlogin); 1361 #endif 1362 /* upward compat. */ 1363 if (!srccat(varval(STRhome), STRsldottcshrc)) 1364 (void) srccat(varval(STRhome), STRsldotcshrc); 1365 1366 if (!arginp && !onelflg && !havhash) 1367 dohash(NULL,NULL); 1368 1369 /* 1370 * Source history before .login so that it is available in .login 1371 */ 1372 loadhist(NULL, 0); 1373 #ifndef LOGINFIRST 1374 if (loginsh) 1375 (void) srccat(varval(STRhome), STRsldotlogin); 1376 #endif 1377 if (loginsh || rdirs) 1378 loaddirs(NULL); 1379 } 1380 /* Reset interrupt flag */ 1381 setintr = osetintr; 1382 parintr = oparintr; 1383 exitset--; 1384 1385 /* Initing AFTER .cshrc is the Right Way */ 1386 if (intty && !arginp) { /* PWP setup stuff */ 1387 ed_Init(); /* init the new line editor */ 1388 #ifdef SIG_WINDOW 1389 check_window_size(1); /* mung environment */ 1390 #endif /* SIG_WINDOW */ 1391 } 1392 1393 /* 1394 * Now are ready for the -v and -x flags 1395 */ 1396 if (nverbose) 1397 setNS(STRverbose); 1398 if (nexececho) 1399 setNS(STRecho); 1400 1401 /* 1402 * All the rest of the world is inside this call. The argument to process 1403 * indicates whether it should catch "error unwinds". Thus if we are a 1404 * interactive shell our call here will never return by being blown past on 1405 * an error. 1406 */ 1407 process(setintr); 1408 1409 /* 1410 * Mop-up. 1411 */ 1412 /* Take care of these (especially HUP) here instead of inside flush. */ 1413 handle_pending_signals(); 1414 if (intty) { 1415 if (loginsh) { 1416 xprintf("logout\n"); 1417 xclose(SHIN); 1418 child = 1; 1419 #ifdef TESLA 1420 do_logout = 1; 1421 #endif /* TESLA */ 1422 goodbye(NULL, NULL); 1423 } 1424 else { 1425 xprintf("exit\n"); 1426 } 1427 } 1428 record(); 1429 exitstat(); 1430 return (0); 1431 } 1432 1433 void 1434 untty(void) 1435 { 1436 #ifdef BSDJOBS 1437 if (tpgrp > 0 && opgrp != shpgrp) { 1438 (void) setpgid(0, opgrp); 1439 (void) tcsetpgrp(FSHTTY, opgrp); 1440 (void) resetdisc(FSHTTY); 1441 } 1442 #endif /* BSDJOBS */ 1443 } 1444 1445 void 1446 importpath(Char *cp) 1447 { 1448 size_t i = 0; 1449 Char *dp; 1450 Char **pv; 1451 int c; 1452 1453 for (dp = cp; *dp; dp++) 1454 if (*dp == PATHSEP) 1455 i++; 1456 /* 1457 * i+2 where i is the number of colons in the path. There are i+1 1458 * directories in the path plus we need room for a zero terminator. 1459 */ 1460 pv = xcalloc(i + 2, sizeof(Char *)); 1461 dp = cp; 1462 i = 0; 1463 if (*dp) 1464 for (;;) { 1465 if ((c = *dp) == PATHSEP || c == 0) { 1466 *dp = 0; 1467 pv[i++] = Strsave(*cp ? cp : STRdot); 1468 if (c) { 1469 cp = dp + 1; 1470 *dp = PATHSEP; 1471 } 1472 else 1473 break; 1474 } 1475 #ifdef WINNT_NATIVE 1476 else if (*dp == '\\') 1477 *dp = '/'; 1478 #endif /* WINNT_NATIVE */ 1479 dp++; 1480 } 1481 pv[i] = 0; 1482 cleanup_push(pv, blk_cleanup); 1483 setq(STRpath, pv, &shvhed, VAR_READWRITE); 1484 cleanup_ignore(pv); 1485 cleanup_until(pv); 1486 } 1487 1488 /* 1489 * Source to the file which is the catenation of the argument names. 1490 */ 1491 static int 1492 srccat(Char *cp, Char *dp) 1493 { 1494 if (cp[0] == '/' && cp[1] == '\0') 1495 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL); 1496 else { 1497 Char *ep; 1498 char *ptr; 1499 int rv; 1500 1501 #ifdef WINNT_NATIVE 1502 ep = Strend(cp); 1503 if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */ 1504 dp++; 1505 #endif /* WINNT_NATIVE */ 1506 1507 ep = Strspl(cp, dp); 1508 cleanup_push(ep, xfree); 1509 ptr = short2str(ep); 1510 1511 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL); 1512 cleanup_until(ep); 1513 return rv; 1514 } 1515 } 1516 1517 /* 1518 * Source to a file putting the file descriptor in a safe place (> 2). 1519 */ 1520 #ifndef WINNT_NATIVE 1521 static int 1522 #else 1523 int 1524 #endif /*WINNT_NATIVE*/ 1525 srcfile(const char *f, int onlyown, int flag, Char **av) 1526 { 1527 int unit; 1528 1529 if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1) 1530 return 0; 1531 cleanup_push(&unit, open_cleanup); 1532 unit = dmove(unit, -1); 1533 cleanup_ignore(&unit); 1534 cleanup_until(&unit); 1535 1536 (void) close_on_exec(unit, 1); 1537 srcunit(unit, onlyown, flag, av); 1538 return 1; 1539 } 1540 1541 1542 /* 1543 * Save the shell state, and establish new argument vector, and new input 1544 * fd. 1545 */ 1546 static void 1547 st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av) 1548 { 1549 st->insource = insource; 1550 st->SHIN = SHIN; 1551 /* Want to preserve the meaning of "source file >output". 1552 * Save old descriptors, move new 0,1,2 to safe places and assign 1553 * them to SH* and let process() redo 0,1,2 from them. 1554 * 1555 * The macro returns true if d1 and d2 are good and they point to 1556 * different things. If you don't avoid saving duplicate 1557 * descriptors, you really limit the depth of "source" recursion 1558 * you can do because of all the open file descriptors. -IAN! 1559 */ 1560 #define NEED_SAVE_FD(d1,d2) \ 1561 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \ 1562 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) ) 1563 1564 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */ 1565 if (didfds) { 1566 struct stat s1, s2; 1567 if (NEED_SAVE_FD(0,OLDSTD)) { 1568 st->OLDSTD = OLDSTD; 1569 OLDSTD = dmove(0, -1); 1570 (void)close_on_exec(OLDSTD, 1); 1571 } 1572 if (NEED_SAVE_FD(1,SHOUT)) { 1573 st->SHOUT = SHOUT; 1574 SHOUT = dmove(1, -1); 1575 (void)close_on_exec(SHOUT, 1); 1576 } 1577 if (NEED_SAVE_FD(2,SHDIAG)) { 1578 st->SHDIAG = SHDIAG; 1579 SHDIAG = dmove(2, -1); 1580 (void)close_on_exec(SHDIAG, 1); 1581 } 1582 donefds(); 1583 } 1584 1585 st->intty = intty; 1586 st->whyles = whyles; 1587 st->gointr = gointr; 1588 st->arginp = arginp; 1589 st->evalp = evalp; 1590 st->evalvec = evalvec; 1591 st->alvecp = alvecp; 1592 st->alvec = alvec; 1593 st->onelflg = onelflg; 1594 st->enterhist = enterhist; 1595 st->justpr = justpr; 1596 if (hflg) 1597 st->HIST = HIST; 1598 else 1599 st->HIST = '\0'; 1600 st->cantell = cantell; 1601 cpybin(st->B, B); 1602 1603 /* 1604 * we can now pass arguments to source. 1605 * For compatibility we do that only if arguments were really 1606 * passed, otherwise we keep the old, global $argv like before. 1607 */ 1608 if (av != NULL && *av != NULL) { 1609 struct varent *vp; 1610 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL) 1611 st->argv = saveblk(vp->vec); 1612 else 1613 st->argv = NULL; 1614 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE); 1615 } 1616 else 1617 st->argv = NULL; 1618 st->av = av; 1619 1620 SHIN = unit; /* Do this first */ 1621 1622 /* Establish new input arena */ 1623 { 1624 fbuf = NULL; 1625 fseekp = feobp = fblocks = 0; 1626 settell(); 1627 } 1628 1629 arginp = 0; 1630 onelflg = 0; 1631 intty = isatty(SHIN); 1632 whyles = 0; 1633 gointr = 0; 1634 evalvec = 0; 1635 evalp = 0; 1636 alvec = al; 1637 alvecp = 0; 1638 enterhist = hflg; 1639 if (enterhist) 1640 HIST = '\0'; 1641 insource = 1; 1642 } 1643 1644 1645 /* 1646 * Restore the shell to a saved state 1647 */ 1648 static void 1649 st_restore(void *xst) 1650 { 1651 struct saved_state *st; 1652 1653 st = xst; 1654 if (st->SHIN == -1) 1655 return; 1656 1657 /* Reset input arena */ 1658 { 1659 int i; 1660 Char** nfbuf = fbuf; 1661 int nfblocks = fblocks; 1662 1663 fblocks = 0; 1664 fbuf = NULL; 1665 for (i = 0; i < nfblocks; i++) 1666 xfree(nfbuf[i]); 1667 xfree(nfbuf); 1668 } 1669 cpybin(B, st->B); 1670 1671 xclose(SHIN); 1672 1673 insource = st->insource; 1674 SHIN = st->SHIN; 1675 if (st->OLDSTD != -1) 1676 xclose(OLDSTD), OLDSTD = st->OLDSTD; 1677 if (st->SHOUT != -1) 1678 xclose(SHOUT), SHOUT = st->SHOUT; 1679 if (st->SHDIAG != -1) 1680 xclose(SHDIAG), SHDIAG = st->SHDIAG; 1681 arginp = st->arginp; 1682 onelflg = st->onelflg; 1683 evalp = st->evalp; 1684 evalvec = st->evalvec; 1685 alvecp = st->alvecp; 1686 alvec = st->alvec; 1687 intty = st->intty; 1688 whyles = st->whyles; 1689 gointr = st->gointr; 1690 if (st->HIST != '\0') 1691 HIST = st->HIST; 1692 enterhist = st->enterhist; 1693 cantell = st->cantell; 1694 justpr = st->justpr; 1695 1696 if (st->argv != NULL) 1697 setq(STRargv, st->argv, &shvhed, VAR_READWRITE); 1698 else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL) 1699 unsetv(STRargv); 1700 } 1701 1702 /* 1703 * Source to a unit. If onlyown it must be our file or our group or 1704 * we don't chance it. This occurs on ".cshrc"s and the like. 1705 */ 1706 static void 1707 srcunit(int unit, int onlyown, int hflg, Char **av) 1708 { 1709 struct saved_state st; 1710 1711 st.SHIN = -1; /* st_restore checks this */ 1712 1713 if (unit < 0) 1714 return; 1715 1716 if (onlyown) { 1717 struct stat stb; 1718 1719 if (fstat(unit, &stb) < 0) { 1720 xclose(unit); 1721 return; 1722 } 1723 } 1724 1725 /* Does nothing before st_save() because st.SHIN == -1 */ 1726 cleanup_push(&st, st_restore); 1727 if (setintr) { 1728 pintr_disabled++; 1729 cleanup_push(&pintr_disabled, disabled_cleanup); 1730 } 1731 1732 /* Save the current state and move us to a new state */ 1733 st_save(&st, unit, hflg, NULL, av); 1734 1735 /* 1736 * Now if we are allowing commands to be interrupted, we let ourselves be 1737 * interrupted. 1738 */ 1739 if (setintr) { 1740 cleanup_until(&pintr_disabled); 1741 pintr_disabled++; 1742 cleanup_push(&pintr_disabled, disabled_cleanup); 1743 } 1744 1745 process(0); /* 0 -> blow away on errors */ 1746 1747 /* Restore the old state */ 1748 cleanup_until(&st); 1749 } 1750 1751 1752 /*ARGSUSED*/ 1753 void 1754 goodbye(Char **v, struct command *c) 1755 { 1756 USE(v); 1757 USE(c); 1758 record(); 1759 1760 if (loginsh) { 1761 size_t omark; 1762 sigset_t set; 1763 1764 sigemptyset(&set); 1765 signal(SIGQUIT, SIG_IGN); 1766 sigaddset(&set, SIGQUIT); 1767 sigprocmask(SIG_UNBLOCK, &set, NULL); 1768 signal(SIGINT, SIG_IGN); 1769 sigaddset(&set, SIGINT); 1770 signal(SIGTERM, SIG_IGN); 1771 sigaddset(&set, SIGTERM); 1772 signal(SIGHUP, SIG_IGN); 1773 sigaddset(&set, SIGHUP); 1774 sigprocmask(SIG_UNBLOCK, &set, NULL); 1775 phup_disabled = 1; 1776 setintr = 0; /* No interrupts after "logout" */ 1777 /* Trap errors inside .logout */ 1778 omark = cleanup_push_mark(); 1779 if (setexit() == 0) { 1780 if (!(adrof(STRlogout))) 1781 setcopy(STRlogout, STRnormal, VAR_READWRITE); 1782 #ifdef _PATH_DOTLOGOUT 1783 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1784 #endif 1785 if (adrof(STRhome)) 1786 (void) srccat(varval(STRhome), STRsldtlogout); 1787 #ifdef TESLA 1788 do_logout = 1; 1789 #endif /* TESLA */ 1790 } 1791 cleanup_pop_mark(omark); 1792 } 1793 exitstat(); 1794 } 1795 1796 void 1797 exitstat(void) 1798 { 1799 #ifdef PROF 1800 _mcleanup(); 1801 #endif 1802 /* 1803 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit 1804 * directly because we poke child here. Otherwise we might continue 1805 * unwarrantedly (sic). 1806 */ 1807 child = 1; 1808 1809 xexit(getn(varval(STRstatus))); 1810 } 1811 1812 /* 1813 * in the event of a HUP we want to save the history 1814 */ 1815 void 1816 phup(void) 1817 { 1818 if (loginsh) { 1819 setcopy(STRlogout, STRhangup, VAR_READWRITE); 1820 #ifdef _PATH_DOTLOGOUT 1821 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1822 #endif 1823 if (adrof(STRhome)) 1824 (void) srccat(varval(STRhome), STRsldtlogout); 1825 } 1826 1827 record(); 1828 1829 #ifdef POSIXJOBS 1830 /* 1831 * We kill the last foreground process group. It then becomes 1832 * responsible to propagate the SIGHUP to its progeny. 1833 */ 1834 { 1835 struct process *pp, *np; 1836 1837 for (pp = proclist.p_next; pp; pp = pp->p_next) { 1838 np = pp; 1839 /* 1840 * Find if this job is in the foreground. It could be that 1841 * the process leader has exited and the foreground flag 1842 * is cleared for it. 1843 */ 1844 do 1845 /* 1846 * If a process is in the foreground we try to kill 1847 * it's process group. If we succeed, then the 1848 * whole job is gone. Otherwise we keep going... 1849 * But avoid sending HUP to the shell again. 1850 */ 1851 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) { 1852 np->p_flags &= ~PHUP; 1853 if (killpg(np->p_jobid, SIGHUP) != -1) { 1854 /* In case the job was suspended... */ 1855 #ifdef SIGCONT 1856 (void) killpg(np->p_jobid, SIGCONT); 1857 #endif 1858 break; 1859 } 1860 } 1861 while ((np = np->p_friends) != pp); 1862 } 1863 } 1864 #endif /* POSIXJOBS */ 1865 1866 xexit(SIGHUP); 1867 } 1868 1869 static Char *jobargv[2] = {STRjobs, 0}; 1870 1871 /* 1872 * Catch an interrupt, e.g. during lexical input. 1873 * If we are an interactive shell, we reset the interrupt catch 1874 * immediately. In any case we drain the shell output, 1875 * and finally go through the normal error mechanism, which 1876 * gets a chance to make the shell go away. 1877 */ 1878 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */ 1879 1880 void 1881 pintr(void) 1882 { 1883 just_signaled = 1; 1884 pintr1(1); 1885 } 1886 1887 void 1888 pintr1(int wantnl) 1889 { 1890 if (setintr) { 1891 if (pjobs) { 1892 pjobs = 0; 1893 xputchar('\n'); 1894 dojobs(jobargv, NULL); 1895 stderror(ERR_NAME | ERR_INTR); 1896 } 1897 } 1898 /* MH - handle interrupted completions specially */ 1899 { 1900 if (InsideCompletion) 1901 stderror(ERR_SILENT); 1902 } 1903 /* JV - Make sure we shut off inputl */ 1904 { 1905 (void) Cookedmode(); 1906 GettingInput = 0; 1907 } 1908 drainoline(); 1909 #ifdef HAVE_GETPWENT 1910 (void) endpwent(); 1911 #endif 1912 1913 /* 1914 * If we have an active "onintr" then we search for the label. Note that if 1915 * one does "onintr -" then we shan't be interruptible so we needn't worry 1916 * about that here. 1917 */ 1918 if (gointr) { 1919 gotolab(gointr); 1920 reset(); 1921 } 1922 else if (intty && wantnl) { 1923 if (editing) { 1924 /* 1925 * If we are editing a multi-line input command, and move to 1926 * the beginning of the line, we don't want to trash it when 1927 * we hit ^C 1928 */ 1929 PastBottom(); 1930 ClearLines(); 1931 ClearDisp(); 1932 } 1933 else { 1934 /* xputchar('\n'); *//* Some like this, others don't */ 1935 (void) putraw('\r'); 1936 (void) putraw('\n'); 1937 } 1938 } 1939 stderror(ERR_SILENT); 1940 } 1941 1942 /* 1943 * Process is the main driving routine for the shell. 1944 * It runs all command processing, except for those within { ... } 1945 * in expressions (which is run by a routine evalav in sh.exp.c which 1946 * is a stripped down process), and `...` evaluation which is run 1947 * also by a subset of this code in sh.glob.c in the routine backeval. 1948 * 1949 * The code here is a little strange because part of it is interruptible 1950 * and hence freeing of structures appears to occur when none is necessary 1951 * if this is ignored. 1952 * 1953 * Note that if catch is not set then we will unwind on any error. 1954 * If an end-of-file occurs, we return. 1955 */ 1956 void 1957 process(int catch) 1958 { 1959 jmp_buf_t osetexit; 1960 /* PWP: This might get nuked by longjmp so don't make it a register var */ 1961 size_t omark; 1962 volatile int didexitset = 0; 1963 1964 getexit(osetexit); 1965 omark = cleanup_push_mark(); 1966 for (;;) { 1967 struct command *t; 1968 int hadhist, old_pintr_disabled; 1969 1970 (void)setexit(); 1971 if (didexitset == 0) { 1972 exitset++; 1973 didexitset++; 1974 } 1975 pendjob(); 1976 1977 justpr = enterhist; /* execute if not entering history */ 1978 1979 if (haderr) { 1980 if (!catch) { 1981 /* unwind */ 1982 doneinp = 0; 1983 cleanup_pop_mark(omark); 1984 resexit(osetexit); 1985 reset(); 1986 } 1987 haderr = 0; 1988 /* 1989 * Every error is eventually caught here or the shell dies. It is 1990 * at this point that we clean up any left-over open files, by 1991 * closing all but a fixed number of pre-defined files. Thus 1992 * routines don't have to worry about leaving files open due to 1993 * deeper errors... they will get closed here. 1994 */ 1995 closem(); 1996 continue; 1997 } 1998 if (doneinp) { 1999 doneinp = 0; 2000 break; 2001 } 2002 if (chkstop) 2003 chkstop--; 2004 if (neednote) 2005 pnote(); 2006 if (intty && prompt && evalvec == 0) { 2007 just_signaled = 0; 2008 mailchk(); 2009 /* 2010 * Watch for logins/logouts. Next is scheduled commands stored 2011 * previously using "sched." Then execute periodic commands. 2012 * Following that, the prompt precmd is run. 2013 */ 2014 #ifndef HAVENOUTMP 2015 watch_login(0); 2016 #endif /* !HAVENOUTMP */ 2017 sched_run(); 2018 period_cmd(); 2019 precmd(); 2020 /* 2021 * If we are at the end of the input buffer then we are going to 2022 * read fresh stuff. Otherwise, we are rereading input and don't 2023 * need or want to prompt. 2024 */ 2025 if (fseekp == feobp && aret == TCSH_F_SEEK) 2026 printprompt(0, NULL); 2027 flush(); 2028 setalarm(1); 2029 } 2030 if (seterr) { 2031 xfree(seterr); 2032 seterr = NULL; 2033 } 2034 2035 /* 2036 * Interruptible during interactive reads 2037 */ 2038 if (setintr) 2039 pintr_push_enable(&old_pintr_disabled); 2040 hadhist = lex(¶ml); 2041 if (setintr) 2042 cleanup_until(&old_pintr_disabled); 2043 cleanup_push(¶ml, lex_cleanup); 2044 2045 /* 2046 * Echo not only on VERBOSE, but also with history expansion. If there 2047 * is a lexical error then we forego history echo. 2048 * Do not echo if we're only entering history (source -h). 2049 */ 2050 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) || 2051 (!enterhist && adrof(STRverbose))) 2052 { 2053 int odidfds = didfds; 2054 haderr = 1; 2055 didfds = 0; 2056 prlex(¶ml); 2057 flush(); 2058 haderr = 0; 2059 didfds = odidfds; 2060 } 2061 (void) alarm(0); /* Autologout OFF */ 2062 alrmcatch_disabled = 1; 2063 2064 /* 2065 * Save input text on the history list if reading in old history, or it 2066 * is from the terminal at the top level and not in a loop. 2067 * 2068 * PWP: entry of items in the history list while in a while loop is done 2069 * elsewhere... 2070 */ 2071 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun)) 2072 savehist(¶ml, enterhist > 1); 2073 2074 if (Expand && seterr) 2075 Expand = 0; 2076 2077 /* 2078 * Print lexical error messages, except when sourcing history lists. 2079 */ 2080 if (!enterhist && seterr) 2081 stderror(ERR_OLD); 2082 2083 /* 2084 * If had a history command :p modifier then this is as far as we 2085 * should go 2086 */ 2087 if (justpr) 2088 goto cmd_done; 2089 2090 /* 2091 * If had a tellwhat from twenex() then do 2092 */ 2093 if (tellwhat) { 2094 (void) tellmewhat(¶ml, NULL); 2095 goto cmd_done; 2096 } 2097 2098 alias(¶ml); 2099 2100 #ifdef BSDJOBS 2101 /* 2102 * If we are interactive, try to continue jobs that we have stopped 2103 */ 2104 if (prompt) 2105 continue_jobs(¶ml); 2106 #endif /* BSDJOBS */ 2107 2108 /* 2109 * Check to see if the user typed "rm * .o" or something 2110 */ 2111 if (prompt) 2112 rmstar(¶ml); 2113 /* 2114 * Parse the words of the input into a parse tree. 2115 */ 2116 t = syntax(paraml.next, ¶ml, 0); 2117 /* 2118 * We cannot cleanup push here, because cd /blah; echo foo 2119 * would rewind t on the chdir error, and free the rest of the command 2120 */ 2121 if (seterr) { 2122 freesyn(t); 2123 stderror(ERR_OLD); 2124 } 2125 2126 postcmd(); 2127 /* 2128 * Execute the parse tree From: Michael Schroeder 2129 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp); 2130 */ 2131 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE); 2132 freesyn(t); 2133 2134 /* 2135 * Made it! 2136 */ 2137 #ifdef SIG_WINDOW 2138 if (windowchg || (catch && intty && !whyles && !tellwhat)) { 2139 (void) check_window_size(0); /* for window systems */ 2140 } 2141 #endif /* SIG_WINDOW */ 2142 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB); 2143 cmd_done: 2144 if (cleanup_reset()) 2145 cleanup_until(¶ml); 2146 else 2147 haderr = 1; 2148 } 2149 cleanup_pop_mark(omark); 2150 resexit(osetexit); 2151 exitset--; 2152 handle_pending_signals(); 2153 } 2154 2155 /*ARGSUSED*/ 2156 void 2157 dosource(Char **t, struct command *c) 2158 { 2159 Char *f; 2160 int hflg = 0; 2161 char *file; 2162 2163 USE(c); 2164 t++; 2165 if (*t && eq(*t, STRmh)) { 2166 if (*++t == NULL) 2167 stderror(ERR_NAME | ERR_HFLAG); 2168 hflg++; 2169 } 2170 else if (*t && eq(*t, STRmm)) { 2171 if (*++t == NULL) 2172 stderror(ERR_NAME | ERR_MFLAG); 2173 hflg = 2; 2174 } 2175 2176 f = globone(*t++, G_ERROR); 2177 file = strsave(short2str(f)); 2178 cleanup_push(file, xfree); 2179 xfree(f); 2180 t = glob_all_or_error(t); 2181 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet)) 2182 stderror(ERR_SYSTEM, file, strerror(errno)); 2183 cleanup_until(file); 2184 } 2185 2186 /* 2187 * Check for mail. 2188 * If we are a login shell, then we don't want to tell 2189 * about any mail file unless its been modified 2190 * after the time we started. 2191 * This prevents us from telling the user things he already 2192 * knows, since the login program insists on saying 2193 * "You have mail." 2194 */ 2195 2196 /* 2197 * The AMS version. 2198 * This version checks if the file is a directory, and if so, 2199 * tells you the number of files in it, otherwise do the old thang. 2200 * The magic "+1" in the time calculation is to compensate for 2201 * an AFS bug where directory mtimes are set to 1 second in 2202 * the future. 2203 */ 2204 2205 static void 2206 mailchk(void) 2207 { 2208 struct varent *v; 2209 Char **vp; 2210 time_t t; 2211 int intvl, cnt; 2212 struct stat stb; 2213 int new; 2214 2215 v = adrof(STRmail); 2216 if (v == NULL || v->vec == NULL) 2217 return; 2218 (void) time(&t); 2219 vp = v->vec; 2220 cnt = blklen(vp); 2221 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL; 2222 if (intvl < 1) 2223 intvl = 1; 2224 if (chktim + intvl > t) 2225 return; 2226 for (; *vp; vp++) { 2227 char *filename = short2str(*vp); 2228 char *mboxdir = filename; 2229 2230 if (stat(filename, &stb) < 0) 2231 continue; 2232 #if defined(BSDTIMES) || defined(_SEQUENT_) 2233 new = stb.st_mtime > time0.tv_sec; 2234 #else 2235 new = stb.st_mtime > seconds0; 2236 #endif 2237 if (S_ISDIR(stb.st_mode)) { 2238 DIR *mailbox; 2239 int mailcount = 0; 2240 char *tempfilename; 2241 struct stat stc; 2242 2243 tempfilename = xasprintf("%s/new", filename); 2244 2245 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) { 2246 /* 2247 * "filename/new" exists and is a directory; you are 2248 * using Qmail. 2249 */ 2250 stb = stc; 2251 #if defined(BSDTIMES) || defined(_SEQUENT_) 2252 new = stb.st_mtime > time0.tv_sec; 2253 #else 2254 new = stb.st_mtime > seconds0; 2255 #endif 2256 mboxdir = tempfilename; 2257 } 2258 2259 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) { 2260 xfree(tempfilename); 2261 continue; 2262 } 2263 2264 mailbox = opendir(mboxdir); 2265 xfree(tempfilename); 2266 if (mailbox == NULL) 2267 continue; 2268 2269 /* skip . and .. */ 2270 if (!readdir(mailbox) || !readdir(mailbox)) { 2271 (void)closedir(mailbox); 2272 continue; 2273 } 2274 2275 while (readdir(mailbox)) 2276 mailcount++; 2277 2278 (void)closedir(mailbox); 2279 if (mailcount == 0) 2280 continue; 2281 2282 if (cnt == 1) 2283 xprintf(CGETS(11, 3, "You have %d mail messages.\n"), 2284 mailcount); 2285 else 2286 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"), 2287 mailcount, filename); 2288 } 2289 else { 2290 char *type; 2291 2292 if (stb.st_size == 0 || stb.st_atime >= stb.st_mtime || 2293 (stb.st_atime <= chktim && stb.st_mtime <= chktim) || 2294 (loginsh && !new)) 2295 continue; 2296 type = strsave(new ? CGETS(11, 6, "new ") : ""); 2297 cleanup_push(type, xfree); 2298 if (cnt == 1) 2299 xprintf(CGETS(11, 5, "You have %smail.\n"), type); 2300 else 2301 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename); 2302 cleanup_until(type); 2303 } 2304 } 2305 chktim = t; 2306 } 2307 2308 /* 2309 * Extract a home directory from the password file 2310 * The argument points to a buffer where the name of the 2311 * user whose home directory is sought is currently. 2312 * We return home directory of the user, or NULL. 2313 */ 2314 Char * 2315 gethdir(const Char *home) 2316 { 2317 Char *h; 2318 2319 /* 2320 * Is it us? 2321 */ 2322 if (*home == '\0') { 2323 if ((h = varval(STRhome)) != STRNULL) 2324 return Strsave(h); 2325 else 2326 return NULL; 2327 } 2328 2329 /* 2330 * Look in the cache 2331 */ 2332 if ((h = gettilde(home)) == NULL) 2333 return NULL; 2334 else 2335 return Strsave(h); 2336 } 2337 2338 /* 2339 * Move the initial descriptors to their eventual 2340 * resting places, closing all other units. 2341 */ 2342 void 2343 initdesc(void) 2344 { 2345 #ifdef NLS_BUGS 2346 #ifdef NLS_CATALOGS 2347 nlsclose(); 2348 #endif /* NLS_CATALOGS */ 2349 #endif /* NLS_BUGS */ 2350 2351 2352 didfds = 0; /* 0, 1, 2 aren't set up */ 2353 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1); 2354 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1); 2355 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1); 2356 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1); 2357 #ifndef CLOSE_ON_EXEC 2358 didcch = 0; /* Havent closed for child */ 2359 #endif /* CLOSE_ON_EXEC */ 2360 if (SHDIAG >= 0) 2361 isdiagatty = isatty(SHDIAG); 2362 else 2363 isdiagatty = 0; 2364 if (SHDIAG >= 0) 2365 isoutatty = isatty(SHOUT); 2366 else 2367 isoutatty = 0; 2368 #ifdef NLS_BUGS 2369 #ifdef NLS_CATALOGS 2370 nlsinit(); 2371 #endif /* NLS_CATALOGS */ 2372 #endif /* NLS_BUGS */ 2373 } 2374 2375 2376 void 2377 #ifdef PROF 2378 done(int i) 2379 #else 2380 xexit(int i) 2381 #endif 2382 { 2383 #ifdef TESLA 2384 if (loginsh && do_logout) { 2385 /* this is to send hangup signal to the develcon */ 2386 /* we toggle DTR. clear dtr - sleep 1 - set dtr */ 2387 /* ioctl will return ENOTTY for pty's but we ignore it */ 2388 /* exitstat will run after disconnect */ 2389 /* we sleep for 2 seconds to let things happen in */ 2390 /* .logout and rechist() */ 2391 #ifdef TIOCCDTR 2392 (void) sleep(2); 2393 (void) ioctl(FSHTTY, TIOCCDTR, NULL); 2394 (void) sleep(1); 2395 (void) ioctl(FSHTTY, TIOCSDTR, NULL); 2396 #endif /* TIOCCDTR */ 2397 } 2398 #endif /* TESLA */ 2399 2400 { 2401 struct process *pp, *np; 2402 pid_t mypid = getpid(); 2403 /* Kill all processes marked for hup'ing */ 2404 for (pp = proclist.p_next; pp; pp = pp->p_next) { 2405 np = pp; 2406 do 2407 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp && 2408 np->p_parentid == mypid) { 2409 if (killpg(np->p_jobid, SIGHUP) != -1) { 2410 /* In case the job was suspended... */ 2411 #ifdef SIGCONT 2412 (void) killpg(np->p_jobid, SIGCONT); 2413 #endif 2414 break; 2415 } 2416 } 2417 while ((np = np->p_friends) != pp); 2418 } 2419 } 2420 untty(); 2421 #ifdef NLS_CATALOGS 2422 /* 2423 * We need to call catclose, because SVR4 leaves symlinks behind otherwise 2424 * in the catalog directories. We cannot close on a vforked() child, 2425 * because messages will stop working on the parent too. 2426 */ 2427 if (child == 0) 2428 nlsclose(); 2429 #endif /* NLS_CATALOGS */ 2430 #ifdef WINNT_NATIVE 2431 nt_cleanup(); 2432 #endif /* WINNT_NATIVE */ 2433 _exit(i); 2434 } 2435 2436 #ifndef _PATH_DEFPATH 2437 static Char ** 2438 defaultpath(void) 2439 { 2440 char *ptr; 2441 Char **blk, **blkp; 2442 struct stat stb; 2443 2444 blkp = blk = xmalloc(sizeof(Char *) * 10); 2445 2446 #ifndef NODOT 2447 # ifndef DOTLAST 2448 *blkp++ = Strsave(STRdot); 2449 # endif 2450 #endif 2451 2452 #define DIRAPPEND(a) \ 2453 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \ 2454 *blkp++ = SAVE(ptr) 2455 2456 #ifdef _PATH_LOCAL 2457 DIRAPPEND(_PATH_LOCAL); 2458 #endif 2459 2460 #ifdef _PATH_USRUCB 2461 DIRAPPEND(_PATH_USRUCB); 2462 #endif 2463 2464 #ifdef _PATH_USRBSD 2465 DIRAPPEND(_PATH_USRBSD); 2466 #endif 2467 2468 #ifdef _PATH_BIN 2469 DIRAPPEND(_PATH_BIN); 2470 #endif 2471 2472 #ifdef _PATH_USRBIN 2473 DIRAPPEND(_PATH_USRBIN); 2474 #endif 2475 2476 #undef DIRAPPEND 2477 2478 #ifndef NODOT 2479 # ifdef DOTLAST 2480 *blkp++ = Strsave(STRdot); 2481 # endif 2482 #endif 2483 *blkp = NULL; 2484 return (blk); 2485 } 2486 #endif 2487 2488 static void 2489 record(void) 2490 { 2491 if (!fast) { 2492 recdirs(NULL, adrof(STRsavedirs) != NULL); 2493 rechist(NULL, adrof(STRsavehist) != NULL); 2494 } 2495 displayHistStats("Exiting"); /* no-op unless DEBUG_HIST */ 2496 } 2497 2498 /* 2499 * Grab the tty repeatedly, and give up if we are not in the correct 2500 * tty process group. 2501 */ 2502 int 2503 grabpgrp(int fd, pid_t desired) 2504 { 2505 struct sigaction old; 2506 pid_t pgrp; 2507 size_t i; 2508 2509 for (i = 0; i < 100; i++) { 2510 if ((pgrp = tcgetpgrp(fd)) == -1) 2511 return -1; 2512 if (pgrp == desired) 2513 return 0; 2514 (void)sigaction(SIGTTIN, NULL, &old); 2515 (void)signal(SIGTTIN, SIG_DFL); 2516 (void)kill(0, SIGTTIN); 2517 (void)sigaction(SIGTTIN, &old, NULL); 2518 } 2519 errno = EPERM; 2520 return -1; 2521 } 2522