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 /* 761 * Export the path setting so that subsequent processes use the same path as we do. 762 */ 763 exportpath(adrof(STRpath)->vec); 764 } else 765 /* Importpath() allocates memory for the path, and the 766 * returned pointer from SAVE() was discarded, so 767 * this was a memory leak.. (sg) 768 * 769 * importpath(SAVE(tcp)); 770 */ 771 importpath(str2short(tcp)); 772 773 774 { 775 /* If the SHELL environment variable ends with "tcsh", set 776 * STRshell to the same path. This is to facilitate using 777 * the executable in environments where the compiled-in 778 * default isn't appropriate (sg). 779 */ 780 781 size_t sh_len = 0; 782 783 if ((tcp = getenv("SHELL")) != NULL) { 784 sh_len = strlen(tcp); 785 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) || 786 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0)) 787 setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE); 788 else 789 sh_len = 0; 790 } 791 if (sh_len == 0) 792 setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE); 793 } 794 795 #ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */ 796 if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL) 797 tcp = "SHELL"; 798 tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp))); 799 #endif /* _OSD_POSIX */ 800 801 #ifdef COLOR_LS_F 802 if ((tcp = getenv("LS_COLORS")) != NULL) 803 parseLS_COLORS(str2short(tcp)); 804 #endif /* COLOR_LS_F */ 805 806 doldol = putn((tcsh_number_t)getpid()); /* For $$ */ 807 #ifdef WINNT_NATIVE 808 { 809 char *tmp; 810 Char *tmp2; 811 if ((tmp = getenv("TMP")) != NULL) { 812 tmp = xasprintf("%s/%s", tmp, "sh"); 813 tmp2 = SAVE(tmp); 814 xfree(tmp); 815 } 816 else { 817 tmp2 = SAVE(""); 818 } 819 shtemp = Strspl(tmp2, doldol); /* For << */ 820 xfree(tmp2); 821 } 822 #else /* !WINNT_NATIVE */ 823 #ifdef HAVE_MKSTEMP 824 { 825 char *tmpdir = getenv ("TMPDIR"); 826 if (!tmpdir) 827 tmpdir = "/tmp"; 828 shtemp = Strspl(SAVE(tmpdir), SAVE("/sh" TMP_TEMPLATE)); /* For << */ 829 } 830 #else /* !HAVE_MKSTEMP */ 831 shtemp = Strspl(STRtmpsh, doldol); /* For << */ 832 #endif /* HAVE_MKSTEMP */ 833 #endif /* WINNT_NATIVE */ 834 835 /* 836 * Record the interrupt states from the parent process. If the parent is 837 * non-interruptible our hand must be forced or we (and our children) won't 838 * be either. Our children inherit termination from our parent. We catch it 839 * only if we are the login shell. 840 */ 841 sigaction(SIGINT, NULL, &parintr); 842 sigaction(SIGTERM, NULL, &parterm); 843 844 845 #ifdef TCF 846 /* Enable process migration on ourselves and our progeny */ 847 (void) signal(SIGMIGRATE, SIG_DFL); 848 #endif /* TCF */ 849 850 /* 851 * dspkanji/dspmbyte autosetting 852 */ 853 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */ 854 #if defined(DSPMBYTE) 855 #if defined(NLS) && defined(LC_CTYPE) 856 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR)) 857 #else 858 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) 859 #endif 860 { 861 autoset_dspmbyte(str2short(tcp)); 862 } 863 #if defined(WINNT_NATIVE) 864 else if (!adrof(CHECK_MBYTEVAR)) 865 nt_autoset_dspmbyte(); 866 #endif /* WINNT_NATIVE */ 867 #endif 868 #if defined(AUTOSET_KANJI) 869 # if defined(NLS) && defined(LC_CTYPE) 870 if (setlocale(LC_CTYPE, NULL) != NULL || getenv("LANG") != NULL) 871 # else 872 if (getenv("LANG") != NULL) 873 # endif 874 autoset_kanji(); 875 #endif /* AUTOSET_KANJI */ 876 fix_version(); /* publish the shell version */ 877 878 if (argc > 1 && strcmp(argv[1], "--version") == 0) { 879 xprintf("%S\n", varval(STRversion)); 880 xexit(0); 881 } 882 if (argc > 1 && strcmp(argv[1], "--help") == 0) { 883 xprintf("%S\n\n", varval(STRversion)); 884 xprintf("%s", CGETS(11, 8, HELP_STRING)); 885 xexit(0); 886 } 887 /* 888 * Process the arguments. 889 * 890 * Note that processing of -v/-x is actually delayed till after script 891 * processing. 892 * 893 * We set the first character of our name to be '-' if we are a shell 894 * running interruptible commands. Many programs which examine ps'es 895 * use this to filter such shells out. 896 */ 897 argc--, tempv++; 898 while (argc > 0 && (tcp = tempv[0])[0] == '-' && 899 *++tcp != '\0' && !batch) { 900 do 901 switch (*tcp++) { 902 903 case 0: /* - Interruptible, no prompt */ 904 prompt = 0; 905 setintr = 1; 906 nofile = 1; 907 break; 908 909 case 'b': /* -b Next arg is input file */ 910 batch = 1; 911 break; 912 913 case 'c': /* -c Command input from arg */ 914 if (argc == 1) 915 xexit(0); 916 argc--, tempv++; 917 #ifdef M_XENIX 918 /* Xenix Vi bug: 919 it relies on a 7 bit environment (/bin/sh), so it 920 pass ascii arguments with the 8th bit set */ 921 if (!strcmp(argv[0], "sh")) 922 { 923 char *p; 924 925 for (p = tempv[0]; *p; ++p) 926 *p &= ASCII; 927 } 928 #endif 929 arginp = SAVE(tempv[0]); 930 931 /* 932 * we put the command into a variable 933 */ 934 if (arginp != NULL) 935 setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE); 936 937 /* 938 * * Give an error on -c arguments that end in * backslash to 939 * ensure that you don't make * nonportable csh scripts. 940 */ 941 { 942 int count; 943 944 cp = Strend(arginp); 945 count = 0; 946 while (cp > arginp && *--cp == '\\') 947 ++count; 948 if ((count & 1) != 0) { 949 exiterr = 1; 950 stderror(ERR_ARGC); 951 } 952 } 953 prompt = 0; 954 nofile = 1; 955 break; 956 case 'd': /* -d Load directory stack from file */ 957 rdirs = 1; 958 break; 959 960 #ifdef apollo 961 case 'D': /* -D Define environment variable */ 962 { 963 Char *dp; 964 965 cp = str2short(tcp); 966 if (dp = Strchr(cp, '=')) { 967 *dp++ = '\0'; 968 tsetenv(cp, dp); 969 } 970 else 971 tsetenv(cp, STRNULL); 972 } 973 *tcp = '\0'; /* done with this argument */ 974 break; 975 #endif /* apollo */ 976 977 case 'e': /* -e Exit on any error */ 978 exiterr = 1; 979 break; 980 981 case 'f': /* -f Fast start */ 982 fast = 1; 983 break; 984 985 case 'i': /* -i Interactive, even if !intty */ 986 intact = 1; 987 nofile = 1; 988 break; 989 990 case 'm': /* -m read .cshrc (from su) */ 991 mflag = 1; 992 break; 993 994 case 'n': /* -n Don't execute */ 995 noexec = 1; 996 break; 997 998 case 'q': /* -q (Undoc'd) ... die on quit */ 999 quitit = 1; 1000 break; 1001 1002 case 's': /* -s Read from std input */ 1003 nofile = 1; 1004 break; 1005 1006 case 't': /* -t Read one line from input */ 1007 onelflg = 2; 1008 prompt = 0; 1009 nofile = 1; 1010 break; 1011 1012 case 'v': /* -v Echo hist expanded input */ 1013 nverbose = 1; /* ... later */ 1014 break; 1015 1016 case 'x': /* -x Echo just before execution */ 1017 nexececho = 1; /* ... later */ 1018 break; 1019 1020 case 'V': /* -V Echo hist expanded input */ 1021 setNS(STRverbose); /* NOW! */ 1022 break; 1023 1024 case 'X': /* -X Echo just before execution */ 1025 setNS(STRecho); /* NOW! */ 1026 break; 1027 1028 case 'F': 1029 /* 1030 * This will cause children to be created using fork instead of 1031 * vfork. 1032 */ 1033 use_fork = 1; 1034 break; 1035 1036 case ' ': 1037 case '\t': 1038 case '\r': 1039 case '\n': 1040 /* 1041 * for O/S's that don't do the argument parsing right in 1042 * "#!/foo -f " scripts 1043 */ 1044 break; 1045 1046 default: /* Unknown command option */ 1047 exiterr = 1; 1048 stderror(ERR_TCSHUSAGE, tcp-1, progname); 1049 break; 1050 1051 } while (*tcp); 1052 tempv++, argc--; 1053 } 1054 1055 if (quitit) /* With all due haste, for debugging */ 1056 (void) signal(SIGQUIT, SIG_DFL); 1057 1058 /* 1059 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining 1060 * arguments the first of them is the name of a shell file from which to 1061 * read commands. 1062 */ 1063 if (nofile == 0 && argc > 0) { 1064 nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE); 1065 if (nofile < 0) { 1066 child = 1; /* So this ... */ 1067 /* ... doesn't return */ 1068 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 1069 } 1070 xfree(ffile); 1071 dolzero = 1; 1072 ffile = SAVE(tempv[0]); 1073 /* 1074 * Replace FSHIN. Handle /dev/std{in,out,err} specially 1075 * since once they are closed we cannot open them again. 1076 * In that case we use our own saved descriptors 1077 */ 1078 if ((SHIN = dmove(nofile, FSHIN)) < 0) 1079 switch(nofile) { 1080 case 0: 1081 SHIN = FSHIN; 1082 break; 1083 case 1: 1084 SHIN = FSHOUT; 1085 break; 1086 case 2: 1087 SHIN = FSHDIAG; 1088 break; 1089 default: 1090 stderror(ERR_SYSTEM, tempv[0], strerror(errno)); 1091 break; 1092 } 1093 (void) close_on_exec(SHIN, 1); 1094 prompt = 0; 1095 /* argc not used any more */ tempv++; 1096 } 1097 1098 /* 1099 * Call to closem() used to be part of initdesc(). Now called below where 1100 * the script name argument has become stdin. Kernel may have used a file 1101 * descriptor to hold the name of the script (setuid case) and this name 1102 * mustn't be lost by closing the fd too soon. 1103 */ 1104 closem(); 1105 1106 /* 1107 * Consider input a tty if it really is or we are interactive. but not for 1108 * editing (christos) 1109 */ 1110 if (!(intty = isatty(SHIN))) { 1111 if (adrof(STRedit)) 1112 unsetv(STRedit); 1113 editing = 0; 1114 } 1115 intty |= intact; 1116 #ifndef convex 1117 if (intty || (intact && isatty(SHOUT))) { 1118 if (!batch && (uid != euid || gid != egid)) { 1119 errno = EACCES; 1120 child = 1; /* So this ... */ 1121 /* ... doesn't return */ 1122 stderror(ERR_SYSTEM, progname, strerror(errno)); 1123 } 1124 } 1125 #endif /* convex */ 1126 isoutatty = isatty(SHOUT); 1127 isdiagatty = isatty(SHDIAG); 1128 /* 1129 * Decide whether we should play with signals or not. If we are explicitly 1130 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the 1131 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx") 1132 * Note that in only the login shell is it likely that parent may have set 1133 * signals to be ignored 1134 */ 1135 if (loginsh || intact || (intty && isatty(SHOUT))) 1136 setintr = 1; 1137 settell(); 1138 /* 1139 * Save the remaining arguments in argv. 1140 */ 1141 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE); 1142 1143 /* 1144 * Set up the prompt. 1145 */ 1146 if (prompt) { 1147 setcopy(STRprompt, STRdefprompt, VAR_READWRITE); 1148 /* that's a meta-questionmark */ 1149 setcopy(STRprompt2, STRmquestion, VAR_READWRITE); 1150 setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE); 1151 } 1152 1153 /* 1154 * If we are an interactive shell, then start fiddling with the signals; 1155 * this is a tricky game. 1156 */ 1157 shpgrp = mygetpgrp(); 1158 opgrp = tpgrp = -1; 1159 if (setintr) { 1160 struct sigaction osig; 1161 1162 **argv = '-'; 1163 if (!quitit) /* Wary! */ 1164 (void) signal(SIGQUIT, SIG_IGN); 1165 pintr_disabled = 1; 1166 sigset_interrupting(SIGINT, queue_pintr); 1167 (void) signal(SIGTERM, SIG_IGN); 1168 1169 /* 1170 * No reason I can see not to save history on all these events.. 1171 * Most usual occurrence is in a window system, where we're not a login 1172 * shell, but might as well be... (sg) 1173 * But there might be races when lots of shells exit together... 1174 * [this is also incompatible]. 1175 * We have to be mre careful here. If the parent wants to 1176 * ignore the signals then we leave them untouched... 1177 * We also only setup the handlers for shells that are trully 1178 * interactive. 1179 */ 1180 sigaction(SIGHUP, NULL, &osig); 1181 if (loginsh || osig.sa_handler != SIG_IGN) 1182 /* exit processing on HUP */ 1183 sigset_interrupting(SIGHUP, queue_phup); 1184 #ifdef SIGXCPU 1185 sigaction(SIGXCPU, NULL, &osig); 1186 if (loginsh || osig.sa_handler != SIG_IGN) 1187 /* exit processing on XCPU */ 1188 sigset_interrupting(SIGXCPU, queue_phup); 1189 #endif 1190 #ifdef SIGXFSZ 1191 sigaction(SIGXFSZ, NULL, &osig); 1192 if (loginsh || osig.sa_handler != SIG_IGN) 1193 /* exit processing on XFSZ */ 1194 sigset_interrupting(SIGXFSZ, queue_phup); 1195 #endif 1196 1197 if (quitit == 0 && arginp == 0) { 1198 #ifdef SIGTSTP 1199 (void) signal(SIGTSTP, SIG_IGN); 1200 #endif 1201 #ifdef SIGTTIN 1202 (void) signal(SIGTTIN, SIG_IGN); 1203 #endif 1204 #ifdef SIGTTOU 1205 (void) signal(SIGTTOU, SIG_IGN); 1206 #endif 1207 /* 1208 * Wait till in foreground, in case someone stupidly runs csh & 1209 * dont want to try to grab away the tty. 1210 */ 1211 if (isatty(FSHDIAG)) 1212 f = FSHDIAG; 1213 else if (isatty(FSHOUT)) 1214 f = FSHOUT; 1215 else if (isatty(OLDSTD)) 1216 f = OLDSTD; 1217 else 1218 f = -1; 1219 1220 #ifdef NeXT 1221 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */ 1222 if (shpgrp == 0) { 1223 shpgrp = getpid(); 1224 (void) setpgid(0, shpgrp); 1225 (void) tcsetpgrp(f, shpgrp); 1226 } 1227 #endif /* NeXT */ 1228 #ifdef BSDJOBS /* if we have tty job control */ 1229 if (grabpgrp(f, shpgrp) != -1) { 1230 /* 1231 * Thanks to Matt Day for the POSIX references, and to 1232 * Paul Close for the SGI clarification. 1233 */ 1234 if (setdisc(f) != -1) { 1235 opgrp = shpgrp; 1236 shpgrp = getpid(); 1237 tpgrp = shpgrp; 1238 if (tcsetpgrp(f, shpgrp) == -1) { 1239 /* 1240 * On hpux 7.03 this fails with EPERM. This happens on 1241 * the 800 when opgrp != shpgrp at this point. (we were 1242 * forked from a non job control shell) 1243 * POSIX 7.2.4, says we failed because the process 1244 * group specified did not belong to a process 1245 * in the same session with the tty. So we set our 1246 * process group and try again. 1247 */ 1248 if (setpgid(0, shpgrp) == -1) { 1249 xprintf("setpgid:"); 1250 goto notty; 1251 } 1252 if (tcsetpgrp(f, shpgrp) == -1) { 1253 xprintf("tcsetpgrp:"); 1254 goto notty; 1255 } 1256 } 1257 /* 1258 * We check the process group now. If it is the same, then 1259 * we don't need to set it again. On hpux 7.0 on the 300's 1260 * if we set it again it fails with EPERM. This is the 1261 * correct behavior according to POSIX 4.3.3 if the process 1262 * was a session leader . 1263 */ 1264 else if (shpgrp != mygetpgrp()) { 1265 if(setpgid(0, shpgrp) == -1) { 1266 xprintf("setpgid:"); 1267 goto notty; 1268 } 1269 } 1270 #ifdef IRIS4D 1271 /* 1272 * But on irix 3.3 we need to set it again, even if it is 1273 * the same. We do that to tell the system that we 1274 * need BSD process group compatibility. 1275 */ 1276 else 1277 (void) setpgid(0, shpgrp); 1278 #endif 1279 (void) close_on_exec(dcopy(f, FSHTTY), 1); 1280 } 1281 else 1282 tpgrp = -1; 1283 } 1284 if (tpgrp == -1) { 1285 notty: 1286 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"), 1287 strerror(errno)); 1288 xprintf("%s", 1289 CGETS(11, 2, "Thus no job control in this shell.\n")); 1290 /* 1291 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't 1292 * have access to tty, disable editing too 1293 */ 1294 if (adrof(STRedit)) 1295 unsetv(STRedit); 1296 editing = 0; 1297 } 1298 #else /* BSDJOBS */ /* don't have job control, so frotz it */ 1299 tpgrp = -1; 1300 #endif /* BSDJOBS */ 1301 } 1302 } 1303 if (setintr == 0 && parintr.sa_handler == SIG_DFL) 1304 setintr = 1; 1305 1306 /* 1307 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the 1308 * handler is installed with signal(2) or sigset(2). sigaction(2) must 1309 * be used instead. 1310 * 1311 * David Dawes (dawes@physics.su.oz.au) Sept 1991 1312 */ 1313 sigset_interrupting(SIGCHLD, queue_pchild); 1314 1315 if (intty && !arginp) 1316 (void) ed_Setup(editing);/* Get the tty state, and set defaults */ 1317 /* Only alter the tty state if editing */ 1318 1319 /* 1320 * Set an exit here in case of an interrupt or error reading the shell 1321 * start-up scripts. 1322 */ 1323 osetintr = setintr; 1324 oparintr = parintr; 1325 (void)cleanup_push_mark(); /* There is no outer handler */ 1326 if (setexit() != 0) /* PWP */ 1327 reenter = 1; 1328 else 1329 reenter = 0; 1330 exitset++; 1331 haderr = 0; /* In case second time through */ 1332 if (!fast && reenter == 0) { 1333 /* Will have varval(STRhome) here because set fast if don't */ 1334 { 1335 pintr_disabled++; 1336 cleanup_push(&pintr_disabled, disabled_cleanup); 1337 setintr = 0;/*FIXRESET:cleanup*/ 1338 /* onintr in /etc/ files has no effect */ 1339 parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/ 1340 #ifdef LOGINFIRST 1341 #ifdef _PATH_DOTLOGIN 1342 if (loginsh) 1343 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1344 #endif 1345 #endif 1346 1347 #ifdef _PATH_DOTCSHRC 1348 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL); 1349 #endif 1350 if (!arginp && !onelflg && !havhash) 1351 dohash(NULL,NULL); 1352 #ifndef LOGINFIRST 1353 #ifdef _PATH_DOTLOGIN 1354 if (loginsh) 1355 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL); 1356 #endif 1357 #endif 1358 cleanup_until(&pintr_disabled); 1359 setintr = osetintr; 1360 parintr = oparintr; 1361 } 1362 #ifdef LOGINFIRST 1363 if (loginsh) 1364 (void) srccat(varval(STRhome), STRsldotlogin); 1365 #endif 1366 /* upward compat. */ 1367 if (!srccat(varval(STRhome), STRsldottcshrc)) 1368 (void) srccat(varval(STRhome), STRsldotcshrc); 1369 1370 if (!arginp && !onelflg && !havhash) 1371 dohash(NULL,NULL); 1372 1373 /* 1374 * Source history before .login so that it is available in .login 1375 */ 1376 loadhist(NULL, 0); 1377 #ifndef LOGINFIRST 1378 if (loginsh) 1379 (void) srccat(varval(STRhome), STRsldotlogin); 1380 #endif 1381 if (loginsh || rdirs) 1382 loaddirs(NULL); 1383 } 1384 /* Reset interrupt flag */ 1385 setintr = osetintr; 1386 parintr = oparintr; 1387 exitset--; 1388 1389 /* Initing AFTER .cshrc is the Right Way */ 1390 if (intty && !arginp) { /* PWP setup stuff */ 1391 ed_Init(); /* init the new line editor */ 1392 #ifdef SIG_WINDOW 1393 check_window_size(1); /* mung environment */ 1394 #endif /* SIG_WINDOW */ 1395 } 1396 1397 /* 1398 * Now are ready for the -v and -x flags 1399 */ 1400 if (nverbose) 1401 setNS(STRverbose); 1402 if (nexececho) 1403 setNS(STRecho); 1404 1405 /* 1406 * All the rest of the world is inside this call. The argument to process 1407 * indicates whether it should catch "error unwinds". Thus if we are a 1408 * interactive shell our call here will never return by being blown past on 1409 * an error. 1410 */ 1411 process(setintr); 1412 1413 /* 1414 * Mop-up. 1415 */ 1416 /* Take care of these (especially HUP) here instead of inside flush. */ 1417 handle_pending_signals(); 1418 if (intty) { 1419 if (loginsh) { 1420 xprintf("logout\n"); 1421 xclose(SHIN); 1422 child = 1; 1423 #ifdef TESLA 1424 do_logout = 1; 1425 #endif /* TESLA */ 1426 goodbye(NULL, NULL); 1427 } 1428 else { 1429 xprintf("exit\n"); 1430 } 1431 } 1432 record(); 1433 exitstat(); 1434 return (0); 1435 } 1436 1437 void 1438 untty(void) 1439 { 1440 #ifdef BSDJOBS 1441 if (tpgrp > 0 && opgrp != shpgrp) { 1442 (void) setpgid(0, opgrp); 1443 (void) tcsetpgrp(FSHTTY, opgrp); 1444 (void) resetdisc(FSHTTY); 1445 } 1446 #endif /* BSDJOBS */ 1447 } 1448 1449 void 1450 importpath(Char *cp) 1451 { 1452 size_t i = 0; 1453 Char *dp; 1454 Char **pv; 1455 int c; 1456 1457 for (dp = cp; *dp; dp++) 1458 if (*dp == PATHSEP) 1459 i++; 1460 /* 1461 * i+2 where i is the number of colons in the path. There are i+1 1462 * directories in the path plus we need room for a zero terminator. 1463 */ 1464 pv = xcalloc(i + 2, sizeof(Char *)); 1465 dp = cp; 1466 i = 0; 1467 if (*dp) 1468 for (;;) { 1469 if ((c = *dp) == PATHSEP || c == 0) { 1470 *dp = 0; 1471 pv[i++] = Strsave(*cp ? cp : STRdot); 1472 if (c) { 1473 cp = dp + 1; 1474 *dp = PATHSEP; 1475 } 1476 else 1477 break; 1478 } 1479 #ifdef WINNT_NATIVE 1480 else if (*dp == '\\') 1481 *dp = '/'; 1482 #endif /* WINNT_NATIVE */ 1483 dp++; 1484 } 1485 pv[i] = 0; 1486 cleanup_push(pv, blk_cleanup); 1487 setq(STRpath, pv, &shvhed, VAR_READWRITE); 1488 cleanup_ignore(pv); 1489 cleanup_until(pv); 1490 } 1491 1492 /* 1493 * Source to the file which is the catenation of the argument names. 1494 */ 1495 static int 1496 srccat(Char *cp, Char *dp) 1497 { 1498 if (cp[0] == '/' && cp[1] == '\0') 1499 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL); 1500 else { 1501 Char *ep; 1502 char *ptr; 1503 int rv; 1504 1505 #ifdef WINNT_NATIVE 1506 ep = Strend(cp); 1507 if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */ 1508 dp++; 1509 #endif /* WINNT_NATIVE */ 1510 1511 ep = Strspl(cp, dp); 1512 cleanup_push(ep, xfree); 1513 ptr = short2str(ep); 1514 1515 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL); 1516 cleanup_until(ep); 1517 return rv; 1518 } 1519 } 1520 1521 /* 1522 * Source to a file putting the file descriptor in a safe place (> 2). 1523 */ 1524 #ifndef WINNT_NATIVE 1525 static int 1526 #else 1527 int 1528 #endif /*WINNT_NATIVE*/ 1529 srcfile(const char *f, int onlyown, int flag, Char **av) 1530 { 1531 int unit; 1532 1533 if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1) 1534 return 0; 1535 cleanup_push(&unit, open_cleanup); 1536 unit = dmove(unit, -1); 1537 cleanup_ignore(&unit); 1538 cleanup_until(&unit); 1539 1540 (void) close_on_exec(unit, 1); 1541 srcunit(unit, onlyown, flag, av); 1542 return 1; 1543 } 1544 1545 1546 /* 1547 * Save the shell state, and establish new argument vector, and new input 1548 * fd. 1549 */ 1550 static void 1551 st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av) 1552 { 1553 st->insource = insource; 1554 st->SHIN = SHIN; 1555 /* Want to preserve the meaning of "source file >output". 1556 * Save old descriptors, move new 0,1,2 to safe places and assign 1557 * them to SH* and let process() redo 0,1,2 from them. 1558 * 1559 * The macro returns true if d1 and d2 are good and they point to 1560 * different things. If you don't avoid saving duplicate 1561 * descriptors, you really limit the depth of "source" recursion 1562 * you can do because of all the open file descriptors. -IAN! 1563 */ 1564 #define NEED_SAVE_FD(d1,d2) \ 1565 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \ 1566 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) ) 1567 1568 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */ 1569 if (didfds) { 1570 struct stat s1, s2; 1571 if (NEED_SAVE_FD(0,OLDSTD)) { 1572 st->OLDSTD = OLDSTD; 1573 OLDSTD = dmove(0, -1); 1574 (void)close_on_exec(OLDSTD, 1); 1575 } 1576 if (NEED_SAVE_FD(1,SHOUT)) { 1577 st->SHOUT = SHOUT; 1578 SHOUT = dmove(1, -1); 1579 (void)close_on_exec(SHOUT, 1); 1580 } 1581 if (NEED_SAVE_FD(2,SHDIAG)) { 1582 st->SHDIAG = SHDIAG; 1583 SHDIAG = dmove(2, -1); 1584 (void)close_on_exec(SHDIAG, 1); 1585 } 1586 donefds(); 1587 } 1588 1589 st->intty = intty; 1590 st->whyles = whyles; 1591 st->gointr = gointr; 1592 st->arginp = arginp; 1593 st->evalp = evalp; 1594 st->evalvec = evalvec; 1595 st->alvecp = alvecp; 1596 st->alvec = alvec; 1597 st->onelflg = onelflg; 1598 st->enterhist = enterhist; 1599 st->justpr = justpr; 1600 if (hflg) 1601 st->HIST = HIST; 1602 else 1603 st->HIST = '\0'; 1604 st->cantell = cantell; 1605 cpybin(st->B, B); 1606 1607 /* 1608 * we can now pass arguments to source. 1609 * For compatibility we do that only if arguments were really 1610 * passed, otherwise we keep the old, global $argv like before. 1611 */ 1612 if (av != NULL && *av != NULL) { 1613 struct varent *vp; 1614 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL) 1615 st->argv = saveblk(vp->vec); 1616 else 1617 st->argv = NULL; 1618 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE); 1619 } 1620 else 1621 st->argv = NULL; 1622 st->av = av; 1623 1624 SHIN = unit; /* Do this first */ 1625 1626 /* Establish new input arena */ 1627 { 1628 fbuf = NULL; 1629 fseekp = feobp = fblocks = 0; 1630 settell(); 1631 } 1632 1633 arginp = 0; 1634 onelflg = 0; 1635 intty = isatty(SHIN); 1636 whyles = 0; 1637 gointr = 0; 1638 evalvec = 0; 1639 evalp = 0; 1640 alvec = al; 1641 alvecp = 0; 1642 enterhist = hflg; 1643 if (enterhist) 1644 HIST = '\0'; 1645 insource = 1; 1646 } 1647 1648 1649 /* 1650 * Restore the shell to a saved state 1651 */ 1652 static void 1653 st_restore(void *xst) 1654 { 1655 struct saved_state *st; 1656 1657 st = xst; 1658 if (st->SHIN == -1) 1659 return; 1660 1661 /* Reset input arena */ 1662 { 1663 int i; 1664 Char** nfbuf = fbuf; 1665 int nfblocks = fblocks; 1666 1667 fblocks = 0; 1668 fbuf = NULL; 1669 for (i = 0; i < nfblocks; i++) 1670 xfree(nfbuf[i]); 1671 xfree(nfbuf); 1672 } 1673 cpybin(B, st->B); 1674 1675 xclose(SHIN); 1676 1677 insource = st->insource; 1678 SHIN = st->SHIN; 1679 if (st->OLDSTD != -1) 1680 xclose(OLDSTD), OLDSTD = st->OLDSTD; 1681 if (st->SHOUT != -1) 1682 xclose(SHOUT), SHOUT = st->SHOUT; 1683 if (st->SHDIAG != -1) 1684 xclose(SHDIAG), SHDIAG = st->SHDIAG; 1685 arginp = st->arginp; 1686 onelflg = st->onelflg; 1687 evalp = st->evalp; 1688 evalvec = st->evalvec; 1689 alvecp = st->alvecp; 1690 alvec = st->alvec; 1691 intty = st->intty; 1692 whyles = st->whyles; 1693 gointr = st->gointr; 1694 if (st->HIST != '\0') 1695 HIST = st->HIST; 1696 enterhist = st->enterhist; 1697 cantell = st->cantell; 1698 justpr = st->justpr; 1699 1700 if (st->argv != NULL) 1701 setq(STRargv, st->argv, &shvhed, VAR_READWRITE); 1702 else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL) 1703 unsetv(STRargv); 1704 } 1705 1706 /* 1707 * Source to a unit. If onlyown it must be our file or our group or 1708 * we don't chance it. This occurs on ".cshrc"s and the like. 1709 */ 1710 static void 1711 srcunit(int unit, int onlyown, int hflg, Char **av) 1712 { 1713 struct saved_state st; 1714 1715 st.SHIN = -1; /* st_restore checks this */ 1716 1717 if (unit < 0) 1718 return; 1719 1720 if (onlyown) { 1721 struct stat stb; 1722 1723 if (fstat(unit, &stb) < 0) { 1724 xclose(unit); 1725 return; 1726 } 1727 } 1728 1729 /* Does nothing before st_save() because st.SHIN == -1 */ 1730 cleanup_push(&st, st_restore); 1731 if (setintr) { 1732 pintr_disabled++; 1733 cleanup_push(&pintr_disabled, disabled_cleanup); 1734 } 1735 1736 /* Save the current state and move us to a new state */ 1737 st_save(&st, unit, hflg, NULL, av); 1738 1739 /* 1740 * Now if we are allowing commands to be interrupted, we let ourselves be 1741 * interrupted. 1742 */ 1743 if (setintr) { 1744 cleanup_until(&pintr_disabled); 1745 pintr_disabled++; 1746 cleanup_push(&pintr_disabled, disabled_cleanup); 1747 } 1748 1749 process(0); /* 0 -> blow away on errors */ 1750 1751 /* Restore the old state */ 1752 cleanup_until(&st); 1753 } 1754 1755 1756 /*ARGSUSED*/ 1757 void 1758 goodbye(Char **v, struct command *c) 1759 { 1760 USE(v); 1761 USE(c); 1762 record(); 1763 1764 if (loginsh) { 1765 size_t omark; 1766 sigset_t set; 1767 1768 sigemptyset(&set); 1769 signal(SIGQUIT, SIG_IGN); 1770 sigaddset(&set, SIGQUIT); 1771 sigprocmask(SIG_UNBLOCK, &set, NULL); 1772 signal(SIGINT, SIG_IGN); 1773 sigaddset(&set, SIGINT); 1774 signal(SIGTERM, SIG_IGN); 1775 sigaddset(&set, SIGTERM); 1776 signal(SIGHUP, SIG_IGN); 1777 sigaddset(&set, SIGHUP); 1778 sigprocmask(SIG_UNBLOCK, &set, NULL); 1779 phup_disabled = 1; 1780 setintr = 0; /* No interrupts after "logout" */ 1781 /* Trap errors inside .logout */ 1782 omark = cleanup_push_mark(); 1783 if (setexit() == 0) { 1784 if (!(adrof(STRlogout))) 1785 setcopy(STRlogout, STRnormal, VAR_READWRITE); 1786 #ifdef _PATH_DOTLOGOUT 1787 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1788 #endif 1789 if (adrof(STRhome)) 1790 (void) srccat(varval(STRhome), STRsldtlogout); 1791 #ifdef TESLA 1792 do_logout = 1; 1793 #endif /* TESLA */ 1794 } 1795 cleanup_pop_mark(omark); 1796 } 1797 exitstat(); 1798 } 1799 1800 void 1801 exitstat(void) 1802 { 1803 #ifdef PROF 1804 _mcleanup(); 1805 #endif 1806 /* 1807 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit 1808 * directly because we poke child here. Otherwise we might continue 1809 * unwarrantedly (sic). 1810 */ 1811 child = 1; 1812 1813 xexit(getn(varval(STRstatus))); 1814 } 1815 1816 /* 1817 * in the event of a HUP we want to save the history 1818 */ 1819 void 1820 phup(void) 1821 { 1822 if (loginsh) { 1823 setcopy(STRlogout, STRhangup, VAR_READWRITE); 1824 #ifdef _PATH_DOTLOGOUT 1825 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL); 1826 #endif 1827 if (adrof(STRhome)) 1828 (void) srccat(varval(STRhome), STRsldtlogout); 1829 } 1830 1831 record(); 1832 1833 #ifdef POSIXJOBS 1834 /* 1835 * We kill the last foreground process group. It then becomes 1836 * responsible to propagate the SIGHUP to its progeny. 1837 */ 1838 { 1839 struct process *pp, *np; 1840 1841 for (pp = proclist.p_next; pp; pp = pp->p_next) { 1842 np = pp; 1843 /* 1844 * Find if this job is in the foreground. It could be that 1845 * the process leader has exited and the foreground flag 1846 * is cleared for it. 1847 */ 1848 do 1849 /* 1850 * If a process is in the foreground we try to kill 1851 * it's process group. If we succeed, then the 1852 * whole job is gone. Otherwise we keep going... 1853 * But avoid sending HUP to the shell again. 1854 */ 1855 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) { 1856 np->p_flags &= ~PHUP; 1857 if (killpg(np->p_jobid, SIGHUP) != -1) { 1858 /* In case the job was suspended... */ 1859 #ifdef SIGCONT 1860 (void) killpg(np->p_jobid, SIGCONT); 1861 #endif 1862 break; 1863 } 1864 } 1865 while ((np = np->p_friends) != pp); 1866 } 1867 } 1868 #endif /* POSIXJOBS */ 1869 1870 xexit(SIGHUP); 1871 } 1872 1873 static Char *jobargv[2] = {STRjobs, 0}; 1874 1875 /* 1876 * Catch an interrupt, e.g. during lexical input. 1877 * If we are an interactive shell, we reset the interrupt catch 1878 * immediately. In any case we drain the shell output, 1879 * and finally go through the normal error mechanism, which 1880 * gets a chance to make the shell go away. 1881 */ 1882 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */ 1883 1884 void 1885 pintr(void) 1886 { 1887 just_signaled = 1; 1888 pintr1(1); 1889 } 1890 1891 void 1892 pintr1(int wantnl) 1893 { 1894 if (setintr) { 1895 if (pjobs) { 1896 pjobs = 0; 1897 xputchar('\n'); 1898 dojobs(jobargv, NULL); 1899 stderror(ERR_NAME | ERR_INTR); 1900 } 1901 } 1902 /* MH - handle interrupted completions specially */ 1903 { 1904 if (InsideCompletion) 1905 stderror(ERR_SILENT); 1906 } 1907 /* JV - Make sure we shut off inputl */ 1908 { 1909 (void) Cookedmode(); 1910 GettingInput = 0; 1911 } 1912 drainoline(); 1913 #ifdef HAVE_GETPWENT 1914 (void) endpwent(); 1915 #endif 1916 1917 /* 1918 * If we have an active "onintr" then we search for the label. Note that if 1919 * one does "onintr -" then we shan't be interruptible so we needn't worry 1920 * about that here. 1921 */ 1922 if (gointr) { 1923 gotolab(gointr); 1924 reset(); 1925 } 1926 else if (intty && wantnl) { 1927 if (editing) { 1928 /* 1929 * If we are editing a multi-line input command, and move to 1930 * the beginning of the line, we don't want to trash it when 1931 * we hit ^C 1932 */ 1933 PastBottom(); 1934 ClearLines(); 1935 ClearDisp(); 1936 } 1937 else { 1938 /* xputchar('\n'); *//* Some like this, others don't */ 1939 (void) putraw('\r'); 1940 (void) putraw('\n'); 1941 } 1942 } 1943 stderror(ERR_SILENT); 1944 } 1945 1946 /* 1947 * Process is the main driving routine for the shell. 1948 * It runs all command processing, except for those within { ... } 1949 * in expressions (which is run by a routine evalav in sh.exp.c which 1950 * is a stripped down process), and `...` evaluation which is run 1951 * also by a subset of this code in sh.glob.c in the routine backeval. 1952 * 1953 * The code here is a little strange because part of it is interruptible 1954 * and hence freeing of structures appears to occur when none is necessary 1955 * if this is ignored. 1956 * 1957 * Note that if catch is not set then we will unwind on any error. 1958 * If an end-of-file occurs, we return. 1959 */ 1960 void 1961 process(int catch) 1962 { 1963 jmp_buf_t osetexit; 1964 /* PWP: This might get nuked by longjmp so don't make it a register var */ 1965 size_t omark; 1966 volatile int didexitset = 0; 1967 1968 getexit(osetexit); 1969 omark = cleanup_push_mark(); 1970 for (;;) { 1971 struct command *t; 1972 int hadhist, old_pintr_disabled; 1973 1974 (void)setexit(); 1975 if (didexitset == 0) { 1976 exitset++; 1977 didexitset++; 1978 } 1979 pendjob(); 1980 1981 justpr = enterhist; /* execute if not entering history */ 1982 1983 if (haderr) { 1984 if (!catch) { 1985 /* unwind */ 1986 doneinp = 0; 1987 cleanup_pop_mark(omark); 1988 resexit(osetexit); 1989 reset(); 1990 } 1991 haderr = 0; 1992 /* 1993 * Every error is eventually caught here or the shell dies. It is 1994 * at this point that we clean up any left-over open files, by 1995 * closing all but a fixed number of pre-defined files. Thus 1996 * routines don't have to worry about leaving files open due to 1997 * deeper errors... they will get closed here. 1998 */ 1999 closem(); 2000 continue; 2001 } 2002 if (doneinp) { 2003 doneinp = 0; 2004 break; 2005 } 2006 if (chkstop) 2007 chkstop--; 2008 if (neednote) 2009 pnote(); 2010 if (intty && prompt && evalvec == 0) { 2011 just_signaled = 0; 2012 mailchk(); 2013 /* 2014 * Watch for logins/logouts. Next is scheduled commands stored 2015 * previously using "sched." Then execute periodic commands. 2016 * Following that, the prompt precmd is run. 2017 */ 2018 #ifndef HAVENOUTMP 2019 watch_login(0); 2020 #endif /* !HAVENOUTMP */ 2021 sched_run(); 2022 period_cmd(); 2023 precmd(); 2024 /* 2025 * If we are at the end of the input buffer then we are going to 2026 * read fresh stuff. Otherwise, we are rereading input and don't 2027 * need or want to prompt. 2028 */ 2029 if (fseekp == feobp && aret == TCSH_F_SEEK) 2030 printprompt(0, NULL); 2031 flush(); 2032 setalarm(1); 2033 } 2034 if (seterr) { 2035 xfree(seterr); 2036 seterr = NULL; 2037 } 2038 2039 /* 2040 * Interruptible during interactive reads 2041 */ 2042 if (setintr) 2043 pintr_push_enable(&old_pintr_disabled); 2044 hadhist = lex(¶ml); 2045 if (setintr) 2046 cleanup_until(&old_pintr_disabled); 2047 cleanup_push(¶ml, lex_cleanup); 2048 2049 /* 2050 * Echo not only on VERBOSE, but also with history expansion. If there 2051 * is a lexical error then we forego history echo. 2052 * Do not echo if we're only entering history (source -h). 2053 */ 2054 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) || 2055 (!enterhist && adrof(STRverbose))) 2056 { 2057 int odidfds = didfds; 2058 haderr = 1; 2059 didfds = 0; 2060 prlex(¶ml); 2061 flush(); 2062 haderr = 0; 2063 didfds = odidfds; 2064 } 2065 (void) alarm(0); /* Autologout OFF */ 2066 alrmcatch_disabled = 1; 2067 2068 /* 2069 * Save input text on the history list if reading in old history, or it 2070 * is from the terminal at the top level and not in a loop. 2071 * 2072 * PWP: entry of items in the history list while in a while loop is done 2073 * elsewhere... 2074 */ 2075 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun)) 2076 savehist(¶ml, enterhist > 1); 2077 2078 if (Expand && seterr) 2079 Expand = 0; 2080 2081 /* 2082 * Print lexical error messages, except when sourcing history lists. 2083 */ 2084 if (!enterhist && seterr) 2085 stderror(ERR_OLD); 2086 2087 /* 2088 * If had a history command :p modifier then this is as far as we 2089 * should go 2090 */ 2091 if (justpr) 2092 goto cmd_done; 2093 2094 /* 2095 * If had a tellwhat from twenex() then do 2096 */ 2097 if (tellwhat) { 2098 (void) tellmewhat(¶ml, NULL); 2099 goto cmd_done; 2100 } 2101 2102 alias(¶ml); 2103 2104 #ifdef BSDJOBS 2105 /* 2106 * If we are interactive, try to continue jobs that we have stopped 2107 */ 2108 if (prompt) 2109 continue_jobs(¶ml); 2110 #endif /* BSDJOBS */ 2111 2112 /* 2113 * Check to see if the user typed "rm * .o" or something 2114 */ 2115 if (prompt) 2116 rmstar(¶ml); 2117 /* 2118 * Parse the words of the input into a parse tree. 2119 */ 2120 t = syntax(paraml.next, ¶ml, 0); 2121 /* 2122 * We cannot cleanup push here, because cd /blah; echo foo 2123 * would rewind t on the chdir error, and free the rest of the command 2124 */ 2125 if (seterr) { 2126 freesyn(t); 2127 stderror(ERR_OLD); 2128 } 2129 2130 postcmd(); 2131 /* 2132 * Execute the parse tree From: Michael Schroeder 2133 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp); 2134 */ 2135 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE); 2136 freesyn(t); 2137 2138 /* 2139 * Made it! 2140 */ 2141 #ifdef SIG_WINDOW 2142 if (windowchg || (catch && intty && !whyles && !tellwhat)) { 2143 (void) check_window_size(0); /* for window systems */ 2144 } 2145 #endif /* SIG_WINDOW */ 2146 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB); 2147 cmd_done: 2148 if (cleanup_reset()) 2149 cleanup_until(¶ml); 2150 else 2151 haderr = 1; 2152 } 2153 cleanup_pop_mark(omark); 2154 resexit(osetexit); 2155 exitset--; 2156 handle_pending_signals(); 2157 } 2158 2159 /*ARGSUSED*/ 2160 void 2161 dosource(Char **t, struct command *c) 2162 { 2163 Char *f; 2164 int hflg = 0; 2165 char *file; 2166 2167 USE(c); 2168 t++; 2169 if (*t && eq(*t, STRmh)) { 2170 if (*++t == NULL) 2171 stderror(ERR_NAME | ERR_HFLAG); 2172 hflg++; 2173 } 2174 else if (*t && eq(*t, STRmm)) { 2175 if (*++t == NULL) 2176 stderror(ERR_NAME | ERR_MFLAG); 2177 hflg = 2; 2178 } 2179 2180 f = globone(*t++, G_ERROR); 2181 file = strsave(short2str(f)); 2182 cleanup_push(file, xfree); 2183 xfree(f); 2184 t = glob_all_or_error(t); 2185 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet)) 2186 stderror(ERR_SYSTEM, file, strerror(errno)); 2187 cleanup_until(file); 2188 } 2189 2190 /* 2191 * Check for mail. 2192 * If we are a login shell, then we don't want to tell 2193 * about any mail file unless its been modified 2194 * after the time we started. 2195 * This prevents us from telling the user things he already 2196 * knows, since the login program insists on saying 2197 * "You have mail." 2198 */ 2199 2200 /* 2201 * The AMS version. 2202 * This version checks if the file is a directory, and if so, 2203 * tells you the number of files in it, otherwise do the old thang. 2204 * The magic "+1" in the time calculation is to compensate for 2205 * an AFS bug where directory mtimes are set to 1 second in 2206 * the future. 2207 */ 2208 2209 static void 2210 mailchk(void) 2211 { 2212 struct varent *v; 2213 Char **vp; 2214 time_t t; 2215 int intvl, cnt; 2216 struct stat stb; 2217 int new; 2218 2219 v = adrof(STRmail); 2220 if (v == NULL || v->vec == NULL) 2221 return; 2222 (void) time(&t); 2223 vp = v->vec; 2224 cnt = blklen(vp); 2225 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL; 2226 if (intvl < 1) 2227 intvl = 1; 2228 if (chktim + intvl > t) 2229 return; 2230 for (; *vp; vp++) { 2231 char *filename = short2str(*vp); 2232 char *mboxdir = filename; 2233 2234 if (stat(filename, &stb) < 0) 2235 continue; 2236 #if defined(BSDTIMES) || defined(_SEQUENT_) 2237 new = stb.st_mtime > time0.tv_sec; 2238 #else 2239 new = stb.st_mtime > seconds0; 2240 #endif 2241 if (S_ISDIR(stb.st_mode)) { 2242 DIR *mailbox; 2243 int mailcount = 0; 2244 char *tempfilename; 2245 struct stat stc; 2246 2247 tempfilename = xasprintf("%s/new", filename); 2248 2249 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) { 2250 /* 2251 * "filename/new" exists and is a directory; you are 2252 * using Qmail. 2253 */ 2254 stb = stc; 2255 #if defined(BSDTIMES) || defined(_SEQUENT_) 2256 new = stb.st_mtime > time0.tv_sec; 2257 #else 2258 new = stb.st_mtime > seconds0; 2259 #endif 2260 mboxdir = tempfilename; 2261 } 2262 2263 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) { 2264 xfree(tempfilename); 2265 continue; 2266 } 2267 2268 mailbox = opendir(mboxdir); 2269 xfree(tempfilename); 2270 if (mailbox == NULL) 2271 continue; 2272 2273 /* skip . and .. */ 2274 if (!readdir(mailbox) || !readdir(mailbox)) { 2275 (void)closedir(mailbox); 2276 continue; 2277 } 2278 2279 while (readdir(mailbox)) 2280 mailcount++; 2281 2282 (void)closedir(mailbox); 2283 if (mailcount == 0) 2284 continue; 2285 2286 if (cnt == 1) 2287 xprintf(CGETS(11, 3, "You have %d mail messages.\n"), 2288 mailcount); 2289 else 2290 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"), 2291 mailcount, filename); 2292 } 2293 else { 2294 char *type; 2295 2296 if (stb.st_size == 0 || stb.st_atime >= stb.st_mtime || 2297 (stb.st_atime <= chktim && stb.st_mtime <= chktim) || 2298 (loginsh && !new)) 2299 continue; 2300 type = strsave(new ? CGETS(11, 6, "new ") : ""); 2301 cleanup_push(type, xfree); 2302 if (cnt == 1) 2303 xprintf(CGETS(11, 5, "You have %smail.\n"), type); 2304 else 2305 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename); 2306 cleanup_until(type); 2307 } 2308 } 2309 chktim = t; 2310 } 2311 2312 /* 2313 * Extract a home directory from the password file 2314 * The argument points to a buffer where the name of the 2315 * user whose home directory is sought is currently. 2316 * We return home directory of the user, or NULL. 2317 */ 2318 Char * 2319 gethdir(const Char *home) 2320 { 2321 Char *h; 2322 2323 /* 2324 * Is it us? 2325 */ 2326 if (*home == '\0') { 2327 if ((h = varval(STRhome)) != STRNULL) 2328 return Strsave(h); 2329 else 2330 return NULL; 2331 } 2332 2333 /* 2334 * Look in the cache 2335 */ 2336 if ((h = gettilde(home)) == NULL) 2337 return NULL; 2338 else 2339 return Strsave(h); 2340 } 2341 2342 /* 2343 * Move the initial descriptors to their eventual 2344 * resting places, closing all other units. 2345 */ 2346 void 2347 initdesc(void) 2348 { 2349 #ifdef NLS_BUGS 2350 #ifdef NLS_CATALOGS 2351 nlsclose(); 2352 #endif /* NLS_CATALOGS */ 2353 #endif /* NLS_BUGS */ 2354 2355 2356 didfds = 0; /* 0, 1, 2 aren't set up */ 2357 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1); 2358 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1); 2359 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1); 2360 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1); 2361 #ifndef CLOSE_ON_EXEC 2362 didcch = 0; /* Havent closed for child */ 2363 #endif /* CLOSE_ON_EXEC */ 2364 if (SHDIAG >= 0) 2365 isdiagatty = isatty(SHDIAG); 2366 else 2367 isdiagatty = 0; 2368 if (SHDIAG >= 0) 2369 isoutatty = isatty(SHOUT); 2370 else 2371 isoutatty = 0; 2372 #ifdef NLS_BUGS 2373 #ifdef NLS_CATALOGS 2374 nlsinit(); 2375 #endif /* NLS_CATALOGS */ 2376 #endif /* NLS_BUGS */ 2377 } 2378 2379 2380 void 2381 #ifdef PROF 2382 done(int i) 2383 #else 2384 xexit(int i) 2385 #endif 2386 { 2387 #ifdef TESLA 2388 if (loginsh && do_logout) { 2389 /* this is to send hangup signal to the develcon */ 2390 /* we toggle DTR. clear dtr - sleep 1 - set dtr */ 2391 /* ioctl will return ENOTTY for pty's but we ignore it */ 2392 /* exitstat will run after disconnect */ 2393 /* we sleep for 2 seconds to let things happen in */ 2394 /* .logout and rechist() */ 2395 #ifdef TIOCCDTR 2396 (void) sleep(2); 2397 (void) ioctl(FSHTTY, TIOCCDTR, NULL); 2398 (void) sleep(1); 2399 (void) ioctl(FSHTTY, TIOCSDTR, NULL); 2400 #endif /* TIOCCDTR */ 2401 } 2402 #endif /* TESLA */ 2403 2404 { 2405 struct process *pp, *np; 2406 pid_t mypid = getpid(); 2407 /* Kill all processes marked for hup'ing */ 2408 for (pp = proclist.p_next; pp; pp = pp->p_next) { 2409 np = pp; 2410 do 2411 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp && 2412 np->p_parentid == mypid) { 2413 if (killpg(np->p_jobid, SIGHUP) != -1) { 2414 /* In case the job was suspended... */ 2415 #ifdef SIGCONT 2416 (void) killpg(np->p_jobid, SIGCONT); 2417 #endif 2418 break; 2419 } 2420 } 2421 while ((np = np->p_friends) != pp); 2422 } 2423 } 2424 untty(); 2425 #ifdef NLS_CATALOGS 2426 /* 2427 * We need to call catclose, because SVR4 leaves symlinks behind otherwise 2428 * in the catalog directories. We cannot close on a vforked() child, 2429 * because messages will stop working on the parent too. 2430 */ 2431 if (child == 0) 2432 nlsclose(); 2433 #endif /* NLS_CATALOGS */ 2434 #ifdef WINNT_NATIVE 2435 nt_cleanup(); 2436 #endif /* WINNT_NATIVE */ 2437 _exit(i); 2438 } 2439 2440 #ifndef _PATH_DEFPATH 2441 static Char ** 2442 defaultpath(void) 2443 { 2444 char *ptr; 2445 Char **blk, **blkp; 2446 struct stat stb; 2447 2448 blkp = blk = xmalloc(sizeof(Char *) * 10); 2449 2450 #ifndef NODOT 2451 # ifndef DOTLAST 2452 *blkp++ = Strsave(STRdot); 2453 # endif 2454 #endif 2455 2456 #define DIRAPPEND(a) \ 2457 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \ 2458 *blkp++ = SAVE(ptr) 2459 2460 #ifdef _PATH_LOCAL 2461 DIRAPPEND(_PATH_LOCAL); 2462 #endif 2463 2464 #ifdef _PATH_USRUCB 2465 DIRAPPEND(_PATH_USRUCB); 2466 #endif 2467 2468 #ifdef _PATH_USRBSD 2469 DIRAPPEND(_PATH_USRBSD); 2470 #endif 2471 2472 #ifdef _PATH_BIN 2473 DIRAPPEND(_PATH_BIN); 2474 #endif 2475 2476 #ifdef _PATH_USRBIN 2477 DIRAPPEND(_PATH_USRBIN); 2478 #endif 2479 2480 #undef DIRAPPEND 2481 2482 #ifndef NODOT 2483 # ifdef DOTLAST 2484 *blkp++ = Strsave(STRdot); 2485 # endif 2486 #endif 2487 *blkp = NULL; 2488 return (blk); 2489 } 2490 #endif 2491 2492 static void 2493 record(void) 2494 { 2495 if (!fast) { 2496 recdirs(NULL, adrof(STRsavedirs) != NULL); 2497 rechist(NULL, adrof(STRsavehist) != NULL); 2498 } 2499 displayHistStats("Exiting"); /* no-op unless DEBUG_HIST */ 2500 } 2501 2502 /* 2503 * Grab the tty repeatedly, and give up if we are not in the correct 2504 * tty process group. 2505 */ 2506 int 2507 grabpgrp(int fd, pid_t desired) 2508 { 2509 struct sigaction old; 2510 pid_t pgrp; 2511 size_t i; 2512 2513 for (i = 0; i < 100; i++) { 2514 if ((pgrp = tcgetpgrp(fd)) == -1) 2515 return -1; 2516 if (pgrp == desired) 2517 return 0; 2518 (void)sigaction(SIGTTIN, NULL, &old); 2519 (void)signal(SIGTTIN, SIG_DFL); 2520 (void)kill(0, SIGTTIN); 2521 (void)sigaction(SIGTTIN, &old, NULL); 2522 } 2523 errno = EPERM; 2524 return -1; 2525 } 2526