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- /* $Header: /home/hyperion/mu/christos/src/sys/tcsh-6.00/RCS/sh.c,v 3.9 1991/08/06 07:16:11 christos Exp $ */
- /*
- * sh.c: Main shell routines
- */
- /*-
- * Copyright (c) 1980, 1991 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #include "config.h"
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1991 The Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- RCSID("$Id: sh.c,v 3.9 1991/08/06 07:16:11 christos Exp $")
-
- #include "sh.h"
- #include "tc.h"
- #include "ed.h"
-
- extern bool MapsAreInited;
- extern bool NLSMapsAreInited;
- extern bool NoNLSRebind;
-
- /*
- * C Shell
- *
- * Bill Joy, UC Berkeley, California, USA
- * October 1978, May 1980
- *
- * Jim Kulp, IIASA, Laxenburg, Austria
- * April 1980
- *
- * Filename recognition added:
- * Ken Greer, Ind. Consultant, Palo Alto CA
- * October 1983.
- *
- * Karl Kleinpaste, Computer Consoles, Inc.
- * Added precmd, periodic/tperiod, prompt changes,
- * directory stack hack, and login watch.
- * Sometime March 1983 - Feb 1984.
- *
- * Added scheduled commands, including the "sched" command,
- * plus the call to sched_run near the precmd et al
- * routines.
- * Upgraded scheduled events for running events while
- * sitting idle at command input.
- *
- * Paul Placeway, Ohio State
- * added stuff for running with twenex/inputl 9 Oct 1984.
- *
- * ported to Apple Unix (TM) (OREO) 26 -- 29 Jun 1987
- */
-
- jmp_buf reslab;
-
- #ifdef TESLA
- int do_logout;
- #endif /* TESLA */
-
- Char *dumphist[] = {STRhistory, STRmh, 0, 0};
- Char *loadhist[] = {STRsource, STRmh, STRtildothist, 0};
-
- #ifdef CSHDIRS
- Char *loaddirs[] = {STRsource, STRdirfile, 0};
- bool dflag = 0;
- #endif
-
- #if defined(convex) || defined(__convex__)
- bool use_fork = 0; /* use fork() instead of vfork()? */
- #endif
-
- int nofile = 0;
- bool reenter = 0;
- bool nverbose = 0;
- bool nexececho = 0;
- bool quitit = 0;
- bool fast = 0;
- bool batch = 0;
- bool mflag = 0;
- bool prompt = 1;
- bool enterhist = 0;
- bool tellwhat = 0;
- time_t t_period;
-
- extern char **environ;
-
- static int srccat __P((Char *, Char *));
- static int srcfile __P((char *, bool, bool));
- static sigret_t phup __P((int));
- static void srcunit __P((int, bool, bool));
- static void mailchk __P((void));
- static Char **defaultpath __P((void));
- #ifdef __MINT__
- static Char **defaultsuffixes __P((void));
- void importsuffixes __P((Char *));
- #endif
-
- int
- main(argc, argv)
- int argc;
- char **argv;
- {
- register Char *cp;
- #ifdef AUTOLOGOUT
- register Char *cp2;
- #endif
- register char *tcp, *ttyn;
- register int f;
- register char **tempv;
-
- #ifdef BSDSIGS
- sigvec_t osv;
- #endif /* BSDSIGS */
-
- settimes(); /* Immed. estab. timing base */
- #ifdef TESLA
- do_logout = 0;
- #endif /* TESLA */
-
- osinit(); /* Os dependent initialization */
-
- /*
- * Initialize non constant strings
- */
- #ifdef _PATH_BSHELL
- STR_BSHELL = SAVE(_PATH_BSHELL);
- #endif
- #ifdef _PATH_CSHELL
- STR_SHELLPATH = SAVE(_PATH_CSHELL);
- #endif
- #ifdef _PATH_TCSHELL
- STR_SHELLPATH = SAVE(_PATH_TCSHELL);
- #endif
- STR_environ = blk2short(environ);
- environ = short2blk(STR_environ); /* So that we can free it */
- STR_WORD_CHARS = SAVE(WORD_CHARS);
-
- HIST = '!';
- HISTSUB = '^';
- word_chars = STR_WORD_CHARS;
- bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */
-
- tempv = argv;
- if (eq(str2short(tempv[0]), STRaout)) /* A.out's are quittable */
- quitit = 1;
- uid = getuid();
- gid = getgid();
- /*
- * We are a login shell if: 1. we were invoked as -<something> and we had
- * no arguments 2. or we were invoked only with the -l flag
- */
- loginsh = (**tempv == '-' && argc == 1) || (argc == 2 &&
- tempv[1][0] == '-' && tempv[1][1] == 'l' &&
- tempv[1][2] == '\0');
- #ifdef __MINT__
- /* under MiNT, we're also a login shell if we ran from the desktop and
- * have no arguments
- */
- if (!loginsh && tempv[0][0] == 0 && !tempv[1]) {
- loginsh = 1;
- tempv[0] = "-tcsh";
- }
- #endif
-
- if (loginsh && **tempv != '-') {
- /*
- * Mangle the argv space
- */
- tempv[1][0] = '\0';
- tempv[1][1] = '\0';
- tempv[1] = NULL;
- for (tcp = *tempv; *tcp++;);
- for (tcp--; tcp >= *tempv; tcp--)
- tcp[1] = tcp[0];
- *++tcp = '-';
- argc--;
- }
- if (loginsh)
- (void) time(&chktim);
-
- AsciiOnly = 1;
- NoNLSRebind = getenv("NOREBIND") != NULL;
- #ifdef NLS
- (void) setlocale(LC_ALL, "");
- {
- int k;
-
- for (k = 0200; k <= 0377 && !Isprint(k); k++);
- AsciiOnly = k > 0377;
- }
- #else
- AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL;
- #endif /* NLS */
- if (MapsAreInited && !NLSMapsAreInited)
- ed_InitNLSMaps();
-
- /*
- * Initialize for periodic command intervals. Also, initialize the dummy
- * tty list for login-watch.
- */
- (void) time(&t_period);
- initwatch();
-
- /*
- * Move the descriptors to safe places. The variable didfds is 0 while we
- * have only FSH* to work with. When didfds is true, we have 0,1,2 and
- * prefer to use these.
- */
- initdesc();
-
- /*
- * Get and set the tty now
- */
- if (ttyn = ttyname(SHIN)) {
- /*
- * Could use rindex to get rid of other possible path components, but
- * hpux preserves the subdirectory /pty/ when storing the tty name in
- * utmp, so we keep it too.
- */
- if (strncmp(ttyn, "/dev/", 5) == 0)
- set(STRtty, cp = SAVE(ttyn + 5));
- else
- set(STRtty, cp = SAVE(ttyn));
- }
- else
- set(STRtty, cp = SAVE(""));
- /*
- * Initialize the shell variables. ARGV and PROMPT are initialized later.
- * STATUS is also munged in several places. CHILD is munged when
- * forking/waiting
- */
-
- /*
- * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and
- * on shells running as root. Out of these, autologout should NOT be set
- * for any psudo-terminals (this catches most window systems) and not for
- * any terminal running X windows.
- *
- * At Ohio State, we have had problems with a user having his X session
- * drop out from under him (on a Sun) because the shell in his master
- * xterm timed out and exited.
- *
- * Really, this should be done with a program external to the shell, that
- * watches for no activity (and NO running programs, such as dump) on a
- * terminal for a long peroid of time, and then SIGHUPS the shell on that
- * terminal.
- *
- * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things
- * allways first check to see if loginsh or really root, then do things
- * with ttyname()
- *
- * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the
- * value of cp before using it! ("root can rsh too")
- *
- * PWP: keep the nested ifs; the order of the tests matters and a good
- * (smart) C compiler might re-arange things wrong.
- */
- #ifdef AUTOLOGOUT
- if (loginsh || (uid == 0)) {
- if (*cp) {
- /* only for login shells or root and we must have a tty */
- if ((cp2 = Strrchr(cp, (Char) '/')) != NULL) {
- cp = cp2 + 1;
- }
- if (!((Strncmp(cp, STRtty, 3) == 0) &&
- (cp[3] >= 'p' && cp[3] <= 'u'))) {
- if (getenv("DISPLAY") == NULL) {
- /* NOT on X window shells */
- set(STRautologout, Strsave(STRdefautologout));
- }
- }
- }
- }
- #endif /* AUTOLOGOUT */
-
- (void) sigset(SIGALRM, alrmcatch);
-
- set(STRstatus, Strsave(STR0));
- fix_version(); /* publish the shell version */
-
- /*
- * set the shell-level var to 1 or increment it.
- */
- if ((tcp = getenv("SHLVL")) != NULL) {
- Char buff[BUFSIZ];
-
- Itoa(1 + atoi(tcp), buff);
- set(STRshlvl, Strsave(buff));
- Setenv(STRSHLVL, buff);
- }
- else {
- set(STRshlvl, SAVE("1"));
- Setenv(STRSHLVL, str2short("1"));
- }
-
- #ifdef __MINT__
- if ((tcp = getenv("HOME")) != NULL || (tcp = getcwd(NULL, 128)) != NULL) {
- cp = SAVE(tcp);
- Setenv(STRHOME, cp);
- }
- #else
- if ((tcp = getenv("HOME")) != NULL)
- cp = SAVE(tcp);
- #endif
- else
- cp = NOSTR;
- if (cp == NOSTR)
- fast = 1; /* No home -> can't read scripts */
- else
- set(STRhome, cp);
- dinit(cp); /* dinit thinks that HOME == cwd in a login
- * shell */
- /*
- * Grab other useful things from the environment. Should we grab
- * everything??
- */
- {
- char *cln, *cus;
- Char buff[BUFSIZ];
- struct passwd *pw;
-
-
- #ifdef apollo
- int oid = getoid();
-
- Itoa(oid, buff);
- set(STRoid, Strsave(buff));
- #endif /* apollo */
-
- Itoa(uid, buff);
- set(STRuid, Strsave(buff));
-
- Itoa(gid, buff);
- set(STRgid, Strsave(buff));
-
- cln = getenv("LOGNAME");
- cus = getenv("USER");
- if (cus != NULL)
- set(STRuser, SAVE(cus));
- else if (cln != NULL)
- set(STRuser, SAVE(cln));
- else if ((pw = getpwuid(uid)) == NULL)
- set(STRuser, SAVE("unknown"));
- else
- set(STRuser, SAVE(pw->pw_name));
- if (cln == NULL)
- Setenv(STRLOGNAME, value(STRuser));
- if (cus == NULL)
- Setenv(STRUSER, value(STRuser));
-
- }
-
- /*
- * HOST may be wrong, since rexd transports the entire environment on sun
- * 3.x Just set it again
- */
- {
- char cbuff[MAXHOSTNAMELEN];
-
- if (gethostname(cbuff, sizeof(cbuff)) >= 0) {
- cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */
- Setenv(STRHOST, str2short(cbuff));
- }
- else
- Setenv(STRHOST, str2short("unknown"));
- }
-
-
- /*
- * HOSTTYPE, too. Just set it again.
- */
- Setenv(STRHOSTTYPE, gethosttype());
- #ifdef apollo
- if ((tcp = getenv("SYSTYPE")) == NULL)
- tcp = "bsd4.3";
- Setenv(STRSYSTYPE, str2short(tcp));
- #endif /* apollo */
-
- /*
- * set editing on by default, unless running under Emacs as an inferior
- * shell.
- * We try to do this intelligently. If $TERM is available, then it
- * should determine if we should edit or not. $TERM is preserved
- * across rlogin sessions, so we will not get confused if we rlogin
- * under an emacs shell. Another advantage is that if we run an
- * xterm under an emacs shell, then the $TERM will be set to
- * xterm, so we are going to want to edit. Unfortunately emacs
- * does not restore all the tty modes, so xterm is not very well
- * set up. But this is not the shell's fault.
- */
- if ((tcp = getenv("TERM")) != NULL) {
- set(STRterm, SAVE(tcp));
- editing = (strcmp(tcp, "emacs") != 0);
- }
- else
- editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0);
-
- /*
- * The 'edit' variable is either set or unset. It doesn't
- * need a value. Making it 'emacs' might be confusing.
- */
- if (editing)
- set(STRedit, Strsave(STRNULL));
-
-
- /*
- * still more mutability: make the complete routine automatically add the
- * suffix of file names...
- */
- set(STRaddsuffix, Strsave(STRNULL));
-
- /*
- * Re-initialize path if set in environment
- */
- if ((tcp = getenv("PATH")) == NULL)
- set1(STRpath, defaultpath(), &shvhed);
- else
- importpath(SAVE(tcp));
-
- #ifdef __MINT__
- /*
- * set the suffix search list
- */
- if ((tcp = getenv("SUFFIXES")) == NULL)
- set1(STRsuffixes, defaultsuffixes(), &shvhed);
- else
- importsuffixes(SAVE(tcp));
- #endif
-
- set(STRshell, Strsave(STR_SHELLPATH));
-
- doldol = putn((int) getpid()); /* For $$ */
- shtemp = Strspl(STRtmpsh, doldol); /* For << */
-
- /*
- * Record the interrupt states from the parent process. If the parent is
- * non-interruptible our hand must be forced or we (and our children) won't
- * be either. Our children inherit termination from our parent. We catch it
- * only if we are the login shell.
- */
- #ifdef BSDSIGS
- /* parents interruptibility */
- (void) mysigvec(SIGINT, NULL, &osv);
- parintr = (sigret_t(*) ()) osv.sv_handler;
- (void) mysigvec(SIGTERM, NULL, &osv);
- parterm = (sigret_t(*) ()) osv.sv_handler;
- #else /* BSDSIGS */
- parintr = signal(SIGINT, SIG_IGN); /* parents interruptibility */
- (void) sigset(SIGINT, parintr); /* ... restore */
- parterm = signal(SIGTERM, SIG_IGN); /* parents terminability */
- (void) sigset(SIGTERM, parterm); /* ... restore */
- #endif /* BSDSIGS */
-
- if (loginsh) {
- (void) signal(SIGHUP, phup); /* exit processing on HUP */
- #ifdef SIGXCPU
- (void) signal(SIGXCPU, phup); /* ...and on XCPU */
- #endif /* SIGXCPU */
- #ifdef SIGXFSZ
- (void) signal(SIGXFSZ, phup); /* ...and on XFSZ */
- #endif /* SIGXFSZ */
- }
-
- #ifdef TCF
- /* Enable process migration on ourselves and our progeny */
- (void) signal(SIGMIGRATE, SIG_DFL);
- #endif /* TCF */
-
- /*
- * Process the arguments.
- *
- * Note that processing of -v/-x is actually delayed till after script
- * processing.
- *
- * We set the first character of our name to be '-' if we are a shell running
- * interruptible commands. Many programs which examine ps'es use this to
- * filter such shells out.
- */
- argc--, tempv++;
- while (argc > 0 && (tcp = tempv[0])[0] == '-' &&
- *++tcp != '\0' && !batch) {
- do
- switch (*tcp++) {
-
- case 0: /* - Interruptible, no prompt */
- prompt = 0;
- setintr = 1;
- nofile = 1;
- break;
-
- case 'b': /* -b Next arg is input file */
- batch = 1;
- break;
-
- case 'c': /* -c Command input from arg */
- if (argc == 1)
- xexit(0);
- argc--, tempv++;
- arginp = SAVE(tempv[0]);
- /*
- * * Give an error on -c arguments that end in * backslash to
- * ensure that you don't make * nonportable csh scripts.
- */
- {
- register Char *cp;
- register int count;
-
- cp = arginp + Strlen(arginp);
- count = 0;
- while (cp > arginp && *--cp == '\\')
- ++count;
- if ((count & 1) != 0) {
- exiterr = 1;
- stderror(ERR_ARGC);
- }
- }
- prompt = 0;
- nofile = 1;
- break;
-
- #ifdef CSHDIRS
- case 'd': /* -d Force load of ~/.cshdirs */
- dflag++;
- break;
- #endif
-
-
- case 'e': /* -e Exit on any error */
- exiterr = 1;
- break;
-
- case 'f': /* -f Fast start */
- fast = 1;
- break;
-
- case 'i': /* -i Interactive, even if !intty */
- intact = 1;
- nofile = 1;
- break;
-
- case 'm': /* -m read .cshrc (from su) */
- mflag = 1;
- break;
-
- case 'n': /* -n Don't execute */
- noexec = 1;
- break;
-
- case 'q': /* -q (Undoc'd) ... die on quit */
- quitit = 1;
- break;
-
- case 's': /* -s Read from std input */
- nofile = 1;
- break;
-
- case 't': /* -t Read one line from input */
- onelflg = 2;
- prompt = 0;
- nofile = 1;
- break;
-
- case 'v': /* -v Echo hist expanded input */
- nverbose = 1; /* ... later */
- break;
-
- case 'x': /* -x Echo just before execution */
- nexececho = 1; /* ... later */
- break;
-
- case 'V': /* -V Echo hist expanded input */
- setNS(STRverbose); /* NOW! */
- break;
-
- case 'X': /* -X Echo just before execution */
- setNS(STRecho); /* NOW! */
- break;
-
- #if defined(__convex__) || defined(convex)
- case 'F': /* Undocumented flag */
- /*
- * This will cause children to be created using fork instead of
- * vfork.
- */
- use_fork = 1;
- break;
- #endif
-
- } while (*tcp);
- tempv++, argc--;
- }
-
- if (quitit) /* With all due haste, for debugging */
- (void) signal(SIGQUIT, SIG_DFL);
-
- /*
- * Unless prevented by -, -c, -i, -s, or -t, if there are remaining
- * arguments the first of them is the name of a shell file from which to
- * read commands.
- */
- if (nofile == 0 && argc > 0) {
- #ifdef __MINT__
- char *cshfile;
-
- nofile = open(tempv[0], O_RDONLY);
- if (nofile < 0) {
- /* maybe the user tried to execute "foo.csh" as just "foo" */
- cshfile = alloca(strlen(tempv[0]) + 5);
- strcpy(cshfile, tempv[0]);
- strcat(cshfile, ".csh");
- nofile = open(cshfile, O_RDONLY);
- }
- #else
- nofile = open(tempv[0], O_RDONLY);
- #endif
- if (nofile < 0) {
- child = 1; /* So this ... */
- /* ... doesn't return */
- stderror(ERR_SYSTEM, tempv[0], strerror(errno));
- }
- ffile = SAVE(tempv[0]);
- /*
- * Replace FSHIN. Handle /dev/std{in,out,err} specially
- * since once they are closed we cannot open them again.
- * In that case we use our own saved descriptors
- */
- if ((SHIN = dmove(nofile, FSHIN)) < 0)
- switch(nofile) {
- case 0:
- SHIN = FSHIN;
- break;
- case 1:
- SHIN = FSHOUT;
- break;
- case 2:
- SHIN = FSHDIAG;
- break;
- default:
- stderror(ERR_SYSTEM, tempv[0], strerror(errno));
- break;
- }
- #ifdef FIOCLEX
- (void) ioctl(SHIN, FIOCLEX, NULL);
- #endif
- prompt = 0;
- /* argc not used any more */ tempv++;
- }
- /*
- * Consider input a tty if it really is or we are interactive. but not for
- * editing (christos)
- */
- if (!(intty = isatty(SHIN))) {
- if (adrof(STRedit))
- unsetv(STRedit);
- editing = 0;
- }
- intty |= intact;
- if (intty || (intact && isatty(SHOUT))) {
- if (!batch && (uid != geteuid() || gid != getegid())) {
- errno = EACCES;
- child = 1; /* So this ... */
- /* ... doesn't return */
- stderror(ERR_SYSTEM, "tcsh", strerror(errno));
- }
- }
- isoutatty = isatty(SHOUT);
- isdiagatty = isatty(SHDIAG);
- /*
- * Decide whether we should play with signals or not. If we are explicitly
- * told (via -i, or -) or we are a login shell (arg0 starts with -) or the
- * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx")
- * Note that in only the login shell is it likely that parent may have set
- * signals to be ignored
- */
- if (loginsh || intact || intty && isatty(SHOUT))
- setintr = 1;
- settell();
- /*
- * Save the remaining arguments in argv.
- */
- setq(STRargv, blk2short(tempv), &shvhed);
-
- /*
- * Set up the prompt.
- */
- if (prompt) {
- set(STRprompt, Strsave(uid == 0 ? STRsymhash : STRsymarrow));
- /* that's a meta-questionmark */
- set(STRprompt2, Strsave(STRmquestion));
- set(STRprompt3, Strsave(STRCORRECT));
- }
-
- /*
- * If we are an interactive shell, then start fiddling with the signals;
- * this is a tricky game.
- */
- shpgrp = mygetpgrp();
- opgrp = tpgrp = -1;
- if (setintr) {
- **argv = '-';
- if (!quitit) /* Wary! */
- (void) signal(SIGQUIT, SIG_IGN);
- (void) sigset(SIGINT, pintr);
- (void) sighold(SIGINT);
- (void) signal(SIGTERM, SIG_IGN);
- if (quitit == 0 && arginp == 0) {
- #ifdef SIGTSTP
- (void) signal(SIGTSTP, SIG_IGN);
- #endif
- #ifdef SIGTTIN
- (void) signal(SIGTTIN, SIG_IGN);
- #endif
- #ifdef SIGTTOU
- (void) signal(SIGTTOU, SIG_IGN);
- #endif
- /*
- * Wait till in foreground, in case someone stupidly runs csh &
- * dont want to try to grab away the tty.
- */
- if (isatty(FSHDIAG))
- f = FSHDIAG;
- else if (isatty(FSHOUT))
- f = FSHOUT;
- else if (isatty(OLDSTD))
- f = OLDSTD;
- else
- f = -1;
-
- #ifdef NeXT
- /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */
- if (shpgrp == 0) {
- shpgrp = getpid();
- (void) setpgid(0, shpgrp);
- (void) tcsetpgrp(f, shpgrp);
- }
- #endif /* NeXT */
- retry:
- #ifdef BSDJOBS /* if we have tty job control */
- if ((tpgrp = tcgetpgrp(f)) != -1) {
- if (tpgrp != shpgrp) {
- sigret_t(*old) () = signal(SIGTTIN, SIG_DFL);
- (void) kill(0, SIGTTIN);
- (void) signal(SIGTTIN, old);
- goto retry;
- }
- /*
- * Thanks to Matt Day for the POSIX references, and to
- * Paul Close for the SGI clarification.
- */
- if (setdisc(f) != -1) {
- opgrp = shpgrp;
- shpgrp = getpid();
- tpgrp = shpgrp;
- if (tcsetpgrp(f, shpgrp) == -1) {
- /*
- * On hpux 7.03 this fails with EPERM. This happens on
- * the 800 when opgrp != shpgrp at this point. (we were
- * forked from a non job control shell)
- * POSIX 7.2.4, says we failed because the process
- * group specified did not belong to a process
- * in the same session with the tty. So we set our
- * process group and try again.
- */
- if (setpgid(0, shpgrp) == -1) {
- xprintf("setpgid:");
- goto notty;
- }
- if (tcsetpgrp(f, shpgrp) == -1) {
- xprintf("tcsetpgrp:");
- goto notty;
- }
- }
- /*
- * We check the process group now. If it is the same, then
- * we don't need to set it again. On hpux 7.0 on the 300's
- * if we set it again it fails with EPERM. This is the
- * correct behavior according to POSIX 4.3.3 if the process
- * was a session leader .
- */
- else if (shpgrp != mygetpgrp()) {
- if(setpgid(0, shpgrp) == -1) {
- xprintf("setpgid:");
- goto notty;
- }
- }
- #ifdef IRIS4D
- /*
- * But on irix 3.3 we need to set it again, even if it is
- * the same. We do that to tell the system that we
- * need BSD process group compatibility.
- */
- else
- (void) setpgid(0, shpgrp);
- #endif
- #ifdef FIOCLEX
- (void) ioctl(dcopy(f, FSHTTY), FIOCLEX, NULL);
- #else /* FIOCLEX */
- (void) dcopy(f, FSHTTY);
- #endif /* FIOCLEX */
- }
- else
- tpgrp = -1;
- }
- if (tpgrp == -1) {
- notty:
- xprintf("Warning: no access to tty (%s).\n", strerror(errno));
- xprintf("Thus no job control in this shell.\n");
- /*
- * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't
- * have access to tty, disable editing too
- */
- if (adrof(STRedit))
- unsetv(STRedit);
- editing = 0;
- }
- #else /* BSDJOBS */ /* don't have job control, so frotz it */
- tpgrp = -1;
- #endif /* BSDJOBS */
- }
- }
- if ((setintr == 0) && (parintr == SIG_DFL))
- setintr = 1;
- (void) sigset(SIGCHLD, pchild); /* while signals not ready */
-
- /*
- * Set an exit here in case of an interrupt or error reading the shell
- * start-up scripts.
- */
- reenter = setexit(); /* PWP */
- haderr = 0; /* In case second time through */
- if (!fast && reenter == 0) {
- /* Will have value(STRhome) here because set fast if don't */
- {
- int osetintr = setintr;
-
- #ifdef BSDSIGS
- sigmask_t omask = sigblock(sigmask(SIGINT));
- #else
- sighold(SIGINT);
- #endif
- setintr = 0;
- #ifdef _PATH_DOTCSHRC
- (void) srcfile(_PATH_DOTCSHRC, 0, 0);
- #endif
- if (!arginp && !onelflg && !havhash)
- dohash(NULL,NULL);
- #ifdef _PATH_DOTLOGIN
- if (loginsh)
- (void) srcfile(_PATH_DOTLOGIN, 0, 0);
- #endif
- #ifdef BSDSIGS
- (void) sigsetmask(omask);
- #else
- (void) sigrelse(SIGINT);
- #endif
- setintr = osetintr;
- }
- #ifdef LOGINFIRST
- if (loginsh)
- (void) srccat(value(STRhome), STRsldotlogin);
- #endif
- /* upward compat. */
- if (!srccat(value(STRhome), STRsldottcshrc))
- (void) srccat(value(STRhome), STRsldotcshrc);
-
- if (!fast && !arginp && !onelflg && !havhash)
- dohash(NULL,NULL);
- /*
- * Source history before .login so that it is available in .login
- */
- if ((cp = value(STRhistfile)) != STRNULL)
- loadhist[2] = cp;
- dosource(loadhist, NULL);
- #ifndef LOGINFIRST
- if (loginsh)
- (void) srccat(value(STRhome), STRsldotlogin);
- #endif
- #ifdef CSHDIRS
- /*
- * if dflag then source ~/.cshdirs, but if fast ALWAYS skip the dirs
- * restoring. (dflag used to get non-login shells to source the save
- * dirs file). Of course, ~/.cshdirs must exist. -strike
- */
- {
- extern int bequiet; /* make dirs shut up */
- Char cshd[BUFSIZ];
- struct stat st;
-
- (void) Strcpy(cshd, value(STRhome));
- (void) Strcat(cshd, STRsldtdirs);
- if (!stat(short2str(cshd), &st) &&
- (dflag || loginsh) && !fast) {
- bequiet = 1;
- dosource(loaddirs, NULL);
- bequiet = 0;
- }
- }
- #endif
- }
- /* Initing AFTER .cshrc is the Right Way */
- if (intty && !arginp) { /* PWP setup stuff */
- ed_Init(); /* init the new line editor */
- #ifdef SIG_WINDOW
- check_window_size(1); /* mung environment */
- #endif /* SIG_WINDOW */
- }
-
- /*
- * Now are ready for the -v and -x flags
- */
- if (nverbose)
- setNS(STRverbose);
- if (nexececho)
- setNS(STRecho);
- /*
- * All the rest of the world is inside this call. The argument to process
- * indicates whether it should catch "error unwinds". Thus if we are a
- * interactive shell our call here will never return by being blown past on
- * an error.
- */
- process(setintr);
-
- /*
- * Mop-up.
- */
- if (intty) {
- if (loginsh) {
- xprintf("logout\n");
- (void) close(SHIN);
- child = 1;
- #ifdef TESLA
- do_logout = 1;
- #endif /* TESLA */
- goodbye(NULL, NULL);
- }
- else {
- xprintf("exit\n");
- }
- }
- #ifdef CSHDIRS
- /*
- * save the directory stack -strike
- */
- recdirs();
- #endif
- rechist();
- exitstat();
- return (0);
- }
-
- void
- untty()
- {
- #ifdef BSDJOBS
- if (tpgrp > 0) {
- (void) setpgid(0, opgrp);
- (void) tcsetpgrp(FSHTTY, opgrp);
- (void) resetdisc(FSHTTY);
- }
- #endif /* BSDJOBS */
- }
-
- void
- importpath(cp)
- Char *cp;
- {
- register int i = 0;
- register Char *dp;
- register Char **pv;
- int c;
-
- for (dp = cp; *dp; dp++)
- if (*dp == ':')
- i++;
- /*
- * i+2 where i is the number of colons in the path. There are i+1
- * directories in the path plus we need room for a zero terminator.
- */
- pv = (Char **) xcalloc((size_t) (i + 2), sizeof(Char *));
- dp = cp;
- i = 0;
- if (*dp)
- for (;;) {
- if ((c = *dp) == ':' || c == 0) {
- *dp = 0;
- pv[i++] = Strsave(*cp ? cp : STRdot);
- if (c) {
- cp = dp + 1;
- *dp = ':';
- }
- else
- break;
- }
- dp++;
- }
- pv[i] = 0;
- set1(STRpath, pv, &shvhed);
- }
-
- /*
- * Source to the file which is the catenation of the argument names.
- */
- static int
- srccat(cp, dp)
- Char *cp, *dp;
- {
- if (cp[0] == '/' && cp[1] == '\0')
- return srcfile(short2str(dp), mflag ? 0 : 1, 0);
- else {
- register Char *ep = Strspl(cp, dp);
- char *ptr = short2str(ep);
-
- xfree((ptr_t) ep);
- return srcfile(ptr, mflag ? 0 : 1, 0);
- }
- }
-
- /*
- * Source to a file putting the file descriptor in a safe place (> 2).
- */
- static int
- srcfile(f, onlyown, flag)
- char *f;
- bool onlyown, flag;
- {
- register int unit;
-
- if ((unit = open(f, O_RDONLY)) == -1)
- return 0;
- unit = dmove(unit, -1);
-
- #ifdef FIOCLEX
- (void) ioctl(unit, FIOCLEX, NULL);
- #endif
- srcunit(unit, onlyown, flag);
- return 1;
- }
-
- /*
- * Source to a unit. If onlyown it must be our file or our group or
- * we don't chance it. This occurs on ".cshrc"s and the like.
- */
- int insource;
- static void
- srcunit(unit, onlyown, hflg)
- register int unit;
- bool onlyown, hflg;
- {
- /*
- * PWP: this is arranged like this so that an optimizing compiler won't go
- * and put things like oSHIN in a register that longjmp() restores. The
- * problem is that on my Sun 3/50, gcc will put oSHIN in a register. That
- * would be OK, but setjmp() saves ALL of the registers and longjmp()
- * restores ALL of them, thus if you do a setjmp(), set oSHIN to something
- * (like SHIN), then do a longjmp(), the value of oSHIN will magically
- * become -1 again.
- *
- * Perhaps setjmp() should only save the stack pointer, frame pointer, and
- * program counter...
- */
-
- /* We have to push down a lot of state here */
- /* All this could go into a structure */
- int oSHIN = -1, oldintty = intty, oinsource = insource;
- struct whyle *oldwhyl = whyles;
- Char *ogointr = gointr, *oarginp = arginp;
- Char *oevalp = evalp, **oevalvec = evalvec;
- int oonelflg = onelflg;
- bool oenterhist = enterhist;
- char OHIST = HIST;
- bool otell = cantell;
- struct Bin saveB;
- #ifdef BSDSIGS
- volatile sigmask_t omask = (sigmask_t) 0;
- #endif
- jmp_buf oldexit;
-
- /* The (few) real local variables */
- int my_reenter;
-
- if (unit < 0)
- return;
- if (didfds)
- donefds();
- if (onlyown) {
- struct stat stb;
-
- if (fstat(unit, &stb) < 0
- /* || (stb.st_uid != uid && stb.st_gid != gid) */
- ) {
- (void) close(unit);
- return;
- }
- }
-
- /*
- * There is a critical section here while we are pushing down the input
- * stream since we have stuff in different structures. If we weren't
- * careful an interrupt could corrupt SHIN's Bin structure and kill the
- * shell.
- *
- * We could avoid the critical region by grouping all the stuff in a single
- * structure and pointing at it to move it all at once. This is less
- * efficient globally on many variable references however.
- */
- insource = 1;
- getexit(oldexit);
-
- if (setintr)
- #ifdef BSDSIGS
- omask = sigblock(sigmask(SIGINT));
- #else
- (void) sighold(SIGINT);
- #endif
- /*
- * Bugfix for running out of memory by: Jak Kirman
- * <jak%cs.brown.edu@RELAY.CS.NET>. Solution: pay attention to what
- * setexit() is returning because my_reenter _may_ be in a register, and
- * thus restored to 0 on a longjump(). (PWP: insert flames about
- * compiler-dependant code here) PWP: THANKS LOTS !!!
- */
- /* Setup the new values of the state stuff saved above */
- copy((char *) &(saveB), (char *) &B, sizeof(B));
- fbuf = NULL;
- fseekp = feobp = fblocks = 0;
- oSHIN = SHIN, SHIN = unit, arginp = 0, onelflg = 0;
- intty = isatty(SHIN), whyles = 0, gointr = 0;
- evalvec = 0;
- evalp = 0;
- enterhist = hflg;
- if (enterhist)
- HIST = '\0';
-
- /*
- * Now if we are allowing commands to be interrupted, we let ourselves be
- * interrupted.
- */
- if (setintr)
- #ifdef BSDSIGS
- (void) sigsetmask(omask);
- #else
- (void) sigrelse(SIGINT);
- #endif
- settell();
-
- /* PWP: think of this as like a LISP (unwind-protect ...) */
- /* thanks to Diana Smetters for pointing out how this _should_ be written */
- if ((my_reenter = setexit()) == 0) {
- process(0); /* 0 -> blow away on errors */
- }
-
- if (setintr)
- #ifdef BSDSIGS
- (void) sigsetmask(omask);
- #else
- (void) sigrelse(SIGINT);
- #endif
- if (oSHIN >= 0) {
- register int i;
-
- /* We made it to the new state... free up its storage */
- /* This code could get run twice but xfree doesn't care */
- for (i = 0; i < fblocks; i++)
- xfree((ptr_t) fbuf[i]);
- xfree((ptr_t) fbuf);
-
- /* Reset input arena */
- copy((char *) &B, (char *) &(saveB), sizeof(B));
-
- (void) close(SHIN), SHIN = oSHIN;
- arginp = oarginp, onelflg = oonelflg;
- evalp = oevalp, evalvec = oevalvec;
- intty = oldintty, whyles = oldwhyl, gointr = ogointr;
- if (enterhist)
- HIST = OHIST;
- enterhist = oenterhist;
- cantell = otell;
- }
-
- resexit(oldexit);
- /*
- * If process reset() (effectively an unwind) then we must also unwind.
- */
- if (my_reenter)
- stderror(ERR_SILENT);
- insource = oinsource;
- }
-
- void
- rechist()
- {
- Char buf[BUFSIZ], *hfile;
- int fp, ftmp, oldidfds;
-
- if (!fast) {
- if (value(STRsavehist)[0] == '\0')
- return;
- if ((hfile = value(STRhistfile)) == STRNULL) {
- hfile = Strcpy(buf, value(STRhome));
- (void) Strcat(buf, STRsldthist);
- }
- fp = creat(short2str(hfile), 0600);
- if (fp == -1)
- return;
- oldidfds = didfds;
- didfds = 0;
- ftmp = SHOUT;
- SHOUT = fp;
- (void) Strcpy(buf, value(STRsavehist));
- dumphist[2] = buf;
- dohist(dumphist, NULL);
- (void) close(fp);
- SHOUT = ftmp;
- didfds = oldidfds;
- }
- }
-
- /*ARGSUSED*/
- void
- goodbye(v, c)
- Char **v;
- struct command *c;
- {
- rechist();
-
- #ifdef CSHDIRS
- recdirs();
- #endif
-
- if (loginsh) {
- (void) signal(SIGQUIT, SIG_IGN);
- (void) sigset(SIGINT, SIG_IGN);
- (void) signal(SIGTERM, SIG_IGN);
- setintr = 0; /* No interrupts after "logout" */
- if (!(adrof(STRlogout)))
- set(STRlogout, STRnormal);
- #ifdef _PATH_DOTLOGOUT
- (void) srcfile(_PATH_DOTLOGOUT, 0, 0);
- #endif
- if (adrof(STRhome))
- (void) srccat(value(STRhome), STRsldtlogout);
- #ifdef TESLA
- do_logout = 1;
- #endif /* TESLA */
- }
- exitstat();
- }
-
- void
- exitstat()
- {
- register Char *cp;
- register int i;
- #ifdef PROF
- monitor(0);
- #endif
- /*
- * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit
- * directly because we poke child here. Otherwise we might continue
- * unwarrantedly (sic).
- */
- child = 1;
-
- /*
- * PWP: do this step-by-step because we might get a bus error if
- * status isn't set, so we call getn(NULL).
- */
- cp = value(STRstatus);
-
- if (!cp)
- i = 13;
- else
- i = getn(cp);
-
- xexit(i);
- }
-
- /*
- * in the event of a HUP we want to save the history
- */
- static sigret_t
- phup(i)
- int i;
- {
- #if (SVID > 0) && (SVID < 3)
- (void) sigset(i, SIG_IGN);
- #endif /* SVID > 0 && SVID < 3 */
- rechist();
- #ifdef CSHDIRS
- /*
- * save the directory stack on HUP - strike
- */
- recdirs();
- #endif
- xexit(i);
- #ifndef SIGVOID
- return (i);
- #endif
- }
-
- Char *jobargv[2] = {STRjobs, 0};
-
- /*
- * Catch an interrupt, e.g. during lexical input.
- * If we are an interactive shell, we reset the interrupt catch
- * immediately. In any case we drain the shell output,
- * and finally go through the normal error mechanism, which
- * gets a chance to make the shell go away.
- */
- int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */
-
- #ifdef SIGVOID
- /*ARGSUSED*/
- #endif
- sigret_t
- pintr(i)
- int i;
- {
- #if (SVID > 0) && (SVID < 3)
- (void) sigset(i, pintr);
- #endif /* SVID > 0 && SVID < 3 */
- just_signaled = 1;
- pintr1(1);
- #ifndef SIGVOID
- return (i);
- #endif
- }
-
- void
- pintr1(wantnl)
- bool wantnl;
- {
- register Char **v;
- #ifdef BSDSIGS
- sigmask_t omask;
- #endif
-
- #ifdef BSDSIGS
- omask = sigblock((sigmask_t) 0);
- #endif
- if (setintr) {
- #ifdef BSDSIGS
- (void) sigsetmask(omask & ~sigmask(SIGINT));
- #else
- (void) sigrelse(SIGINT);
- #endif
- if (pjobs) {
- pjobs = 0;
- xprintf("\n");
- dojobs(jobargv, NULL);
- stderror(ERR_NAME | ERR_INTR);
- }
- }
- /* JV - Make sure we shut off inputl */
- {
- extern Char GettingInput;
-
- (void) Cookedmode();
- GettingInput = 0;
- }
- #ifdef BSDSIGS
- (void) sigsetmask(omask & ~sigmask(SIGCHLD));
- #else
- if (setintr)
- (void) sighold(SIGINT);
- (void) sigrelse(SIGCHLD);
- #endif
- draino();
- (void) endpwent();
-
- /*
- * If we have an active "onintr" then we search for the label. Note that if
- * one does "onintr -" then we shan't be interruptible so we needn't worry
- * about that here.
- */
- if (gointr) {
- search(T_GOTO, 0, gointr);
- timflg = 0;
- if (v = pargv)
- pargv = 0, blkfree(v);
- if (v = gargv)
- gargv = 0, blkfree(v);
- reset();
- }
- else if (intty && wantnl) {
- /* xprintf("\n"); *//* Some like this, others don't */
- (void) putraw('\r');
- (void) putraw('\n');
- }
- stderror(ERR_SILENT);
- }
-
- /*
- * Process is the main driving routine for the shell.
- * It runs all command processing, except for those within { ... }
- * in expressions (which is run by a routine evalav in sh.exp.c which
- * is a stripped down process), and `...` evaluation which is run
- * also by a subset of this code in sh.glob.c in the routine backeval.
- *
- * The code here is a little strange because part of it is interruptible
- * and hence freeing of structures appears to occur when none is necessary
- * if this is ignored.
- *
- * Note that if catch is not set then we will unwind on any error.
- * If an end-of-file occurs, we return.
- */
- struct command *savet = NULL;
- void
- process(catch)
- bool catch;
- {
- extern char Expand;
- jmp_buf osetexit;
- /* PWP: This might get nuked my longjmp so don't make it a register var */
- struct command *t = savet;
-
- savet = NULL;
- getexit(osetexit);
- for (;;) {
-
- pendjob();
- paraml.next = paraml.prev = ¶ml;
- paraml.word = STRNULL;
- (void) setexit();
- justpr = enterhist; /* execute if not entering history */
-
- /*
- * Interruptible during interactive reads
- */
- if (setintr)
- #ifdef BSDSIGS
- (void) sigsetmask(sigblock((sigmask_t) 0) & ~sigmask(SIGINT));
- #else
- (void) sigrelse(SIGINT);
- #endif
-
-
- /*
- * For the sake of reset()
- */
- freelex(¶ml);
- if (savet)
- freesyn(savet), savet = NULL;
-
- if (haderr) {
- if (!catch) {
- /* unwind */
- doneinp = 0;
- savet = t;
- resexit(osetexit);
- reset();
- }
- haderr = 0;
- /*
- * Every error is eventually caught here or the shell dies. It is
- * at this point that we clean up any left-over open files, by
- * closing all but a fixed number of pre-defined files. Thus
- * routines don't have to worry about leaving files open due to
- * deeper errors... they will get closed here.
- */
- closem();
- continue;
- }
- if (doneinp) {
- doneinp = 0;
- break;
- }
- if (chkstop)
- chkstop--;
- if (neednote)
- pnote();
- if (intty && prompt && evalvec == 0) {
- mailchk();
- /*
- * Watch for logins/logouts. Next is scheduled commands stored
- * previously using "sched." Then execute periodic commands.
- * Following that, the prompt precmd is run.
- */
- watch_login();
- sched_run();
- period_cmd();
- precmd();
- /*
- * If we are at the end of the input buffer then we are going to
- * read fresh stuff. Otherwise, we are rereading input and don't
- * need or want to prompt.
- */
- if (fseekp == feobp)
- printprompt(0, NULL);
- flush();
- setalarm();
- }
- if (seterr) {
- xfree((ptr_t) seterr);
- seterr = NULL;
- }
-
- /*
- * Echo not only on VERBOSE, but also with history expansion. If there
- * is a lexical error then we forego history echo.
- */
- if (lex(¶ml) && !seterr && intty && !tellwhat && !Expand ||
- adrof(STRverbose)) {
- haderr = 1;
- prlex(¶ml);
- haderr = 0;
- }
- (void) alarm(0); /* Autologout OFF */
-
- /*
- * The parser may lose space if interrupted.
- */
- if (setintr)
- #ifdef BSDSIGS
- (void) sigblock(sigmask(SIGINT));
- #else
- (void) sighold(SIGINT);
- #endif
-
- /*
- * Save input text on the history list if reading in old history, or it
- * is from the terminal at the top level and not in a loop.
- *
- * PWP: entry of items in the history list while in a while loop is done
- * elsewhere...
- */
- if (enterhist || catch && intty && !whyles && !tellwhat)
- savehist(¶ml);
-
- if (Expand && seterr)
- Expand = 0;
-
- /*
- * Print lexical error messages, except when sourcing history lists.
- */
- if (!enterhist && seterr)
- stderror(ERR_OLD);
-
- /*
- * If had a history command :p modifier then this is as far as we
- * should go
- */
- if (justpr)
- reset();
-
- /*
- * If had a tellwhat from twenex() then do
- */
- if (tellwhat) {
- tellmewhat(¶ml);
- reset();
- }
-
- alias(¶ml);
-
- #ifdef BSDJOBS
- /*
- * If we are interactive, try to continue jobs that we have stopped
- */
- if (prompt)
- continue_jobs(¶ml);
- #endif /* BSDJOBS */
-
- /*
- * Check to see if the user typed "rm * .o" or something
- */
- if (prompt)
- rmstar(¶ml);
- /*
- * Parse the words of the input into a parse tree.
- */
- savet = syntax(paraml.next, ¶ml, 0);
- if (seterr)
- stderror(ERR_OLD);
-
- /*
- * Execute the parse tree From: Michael Schroeder
- * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp);
- */
- execute(savet, (tpgrp > 0 ? tpgrp : -1), NULL, NULL);
-
- /*
- * Made it!
- */
- freelex(¶ml);
- freesyn(savet), savet = NULL;
- #ifdef SIG_WINDOW
- if (catch && intty && !whyles && !tellwhat)
- window_change(0); /* for window systems */
- #endif /* SIG_WINDOW */
- }
- savet = t;
- resexit(osetexit);
- }
-
- /*ARGSUSED*/
- void
- dosource(t, c)
- register Char **t;
- struct command *c;
- {
- register Char *f;
- bool hflg = 0;
- Char buf[BUFSIZ];
-
- t++;
- if (*t && eq(*t, STRmh)) {
- if (*++t == NOSTR)
- stderror(ERR_NAME | ERR_HFLAG);
- hflg++;
- }
- (void) Strcpy(buf, *t);
- f = globone(buf, G_ERROR);
- (void) strcpy((char *) buf, short2str(f));
- xfree((ptr_t) f);
- if (!srcfile((char *) buf, 0, hflg) && !hflg)
- stderror(ERR_SYSTEM, (char *) buf, strerror(errno));
- }
-
- /*
- * Check for mail.
- * If we are a login shell, then we don't want to tell
- * about any mail file unless its been modified
- * after the time we started.
- * This prevents us from telling the user things he already
- * knows, since the login program insists on saying
- * "You have mail."
- */
- static void
- mailchk()
- {
- register struct varent *v;
- register Char **vp;
- time_t t;
- int intvl, cnt;
- struct stat stb;
- bool new;
-
- v = adrof(STRmail);
- if (v == 0)
- return;
- (void) time(&t);
- vp = v->vec;
- cnt = blklen(vp);
- intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL;
- if (intvl < 1)
- intvl = 1;
- if (chktim + intvl > t)
- return;
- for (; *vp; vp++) {
- if (stat(short2str(*vp), &stb) < 0)
- continue;
- #if defined(BSDTIMES) || defined(_SEQUENT_)
- new = stb.st_mtime > time0.tv_sec;
- #else
- new = stb.st_mtime > time0;
- #endif
- if (stb.st_size == 0 || stb.st_atime > stb.st_mtime ||
- (stb.st_atime <= chktim && stb.st_mtime <= chktim) ||
- loginsh && !new)
- continue;
- if (cnt == 1)
- xprintf("You have %smail.\n", new ? "new " : "");
- else
- xprintf("%s in %s.\n", new ? "New mail" : "Mail",
- short2str(*vp));
- }
- chktim = t;
- }
-
- /*
- * Extract a home directory from the password file
- * The argument points to a buffer where the name of the
- * user whose home directory is sought is currently.
- * We write the home directory of the user back there.
- */
- int
- gethdir(home)
- Char *home;
- {
- Char *h;
-
- /*
- * Is it us?
- */
- if (*home == '\0') {
- if (h = value(STRhome)) {
- (void) Strcpy(home, h);
- return 0;
- }
- else
- return 1;
- }
-
- /*
- * Look in the cache
- */
- if ((h = gettilde(home)) == NULL)
- return 1;
- else {
- (void) Strcpy(home, h);
- return 0;
- }
- }
-
- /*
- * Move the initial descriptors to their eventual
- * resting places, closing all other units.
- */
- void
- initdesc()
- {
-
- didfds = 0; /* 0, 1, 2 aren't set up */
- #ifdef FIOCLEX
- (void) ioctl(SHIN = dcopy(0, FSHIN), FIOCLEX, NULL);
- (void) ioctl(SHOUT = dcopy(1, FSHOUT), FIOCLEX, NULL);
- (void) ioctl(SHDIAG = dcopy(2, FSHDIAG), FIOCLEX, NULL);
- (void) ioctl(OLDSTD = dcopy(SHIN, FOLDSTD), FIOCLEX, NULL);
- #else
- didcch = 0; /* Havent closed for child */
- SHIN = dcopy(0, FSHIN);
- SHOUT = dcopy(1, FSHOUT);
- isoutatty = isatty(SHOUT);
- SHDIAG = dcopy(2, FSHDIAG);
- isdiagatty = isatty(SHDIAG);
- OLDSTD = dcopy(SHIN, FOLDSTD);
- #endif
- closem();
- }
-
-
- void
- #ifdef PROF
- done(i)
- #else
- xexit(i)
- #endif
- int i;
- {
- #ifdef __MINT__
- void rm_tmpfiles();
- rm_tmpfiles();
- #endif
- #ifdef TESLA
- if (loginsh && do_logout) {
- /* this is to send hangup signal to the develcon */
- /* we toggle DTR. clear dtr - sleep 1 - set dtr */
- /* ioctl will return ENOTTY for pty's but we ignore it */
- /* exitstat will run after disconnect */
- /* we sleep for 2 seconds to let things happen in */
- /* .logout and rechist() */
- #ifdef TIOCCDTR
- (void) sleep(2);
- (void) ioctl(FSHTTY, TIOCCDTR, NULL);
- (void) sleep(1);
- (void) ioctl(FSHTTY, TIOCSDTR, NULL);
- #endif /* TIOCCDTR */
- }
- #endif /* TESLA */
-
- untty();
- _exit(i);
- }
-
- static Char **
- defaultpath()
- {
- char *ptr;
- Char **blk, **blkp;
- struct stat stb;
-
- blkp = blk = (Char **) xmalloc((size_t) sizeof(Char *) * 10);
-
- #ifndef DOTLAST
- *blkp++ = Strsave(STRdot);
- #endif
-
- #define DIRAPPEND(a) \
- if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \
- *blkp++ = SAVE(ptr)
-
- #ifdef _PATH_LOCAL
- DIRAPPEND(_PATH_LOCAL);
- #endif
-
- #ifdef _PATH_USRUCB
- DIRAPPEND(_PATH_USRUCB);
- #endif
-
- #ifdef _PATH_USRBSD
- DIRAPPEND(_PATH_USRBSD);
- #endif
-
- #ifdef _PATH_BIN
- DIRAPPEND(_PATH_BIN);
- #endif
-
- #ifdef _PATH_USRBIN
- DIRAPPEND(_PATH_USRBIN);
- #endif
-
- #undef DIRAPPEND
-
- #ifdef DOTLAST
- *blkp++ = Strsave(STRdot);
- #endif
- *blkp = NULL;
- return (blk);
- }
-
- #ifdef __MINT__
- /*
- * unlink() doesn't always work on an open file, so we try to arrange
- * to remove temporary files (e.g. for here documents) before exiting.
- */
-
- struct tmpfile_rec {
- char *name; /* the name of the temp. file */
- int pid; /* the associated pid */
- struct tmpfile_rec *next;
- } *root;
-
- extern int __mint;
-
- int
- csh_tmpfile()
- {
- extern char *tmpnam();
- struct tmpfile_rec *u;
- int fd;
- char *name;
-
- if ( !(name = tmpnam((char *)0)) )
- return -1;
-
- fd = open(name, O_CREAT|O_EXCL|O_RDWR, 0600);
- if (fd < 0) {
- free(name);
- return -1;
- }
-
- /* in MiNT 0.9 and above, we can often unlink a file and continue to use
- * it; some file systems may return EACCDN for unlinking an open file,
- * in which case we use the old method of unlinking the file at exit
- */
- if (__mint >= 9) {
- if (unlink(name) == 0)
- return fd;
- }
-
- /* if the unlink failed, save the name for future deleting */
-
- u = (struct tmpfile_rec *)malloc(sizeof(*u));
- if (!u) {
- /* would it be better to fail? I dunno, but at worst the user is left
- * with a junk file in a temporary directory
- */
- return fd;
- }
-
- u->name = name;
- u->pid = getpid();
- u->next = root;
- root = u;
- return fd;
- }
-
- void
- rm_tmpfiles()
- {
- int pid = getpid();
- struct tmpfile_rec **old, *u;
-
- old = &root;
- u = root;
- while (u) {
- if (u->pid == pid) {
- (void) unlink(u->name);
- *old = u->next;
- } else {
- old = &u->next;
- }
- u = u->next;
- }
- }
-
- /* MiNT suffix stuff */
-
- void
- importsuffixes(cp)
- Char *cp;
- {
- register int i = 0;
- register Char *dp;
- register Char **pv;
- int c;
-
- for (dp = cp; *dp; dp++)
- if (*dp == ',')
- i++;
- /*
- * i+2 where i is the number of ',' in the suffix list. There are i+1
- * suffixes plus we need room for a zero terminator.
- */
- pv = (Char **) xcalloc((size_t) (i + 2), sizeof(Char *));
- dp = cp;
- i = 0;
- if (*dp)
- for (;;) {
- if ((c = *dp) == ',' || c == 0) {
- *dp = 0;
- pv[i++] = Strsave(cp);
- if (c) {
- cp = dp + 1;
- *dp = ',';
- }
- else
- break;
- }
- dp++;
- }
- pv[i] = 0;
- set1(STRsuffixes, pv, &shvhed);
- }
-
- static Char **
- defaultsuffixes()
- {
- Char **blk, **blkp;
-
- blkp = blk = (Char **) xmalloc((size_t) sizeof(Char *) * 8);
-
- *blkp++ = SAVE("ttp");
- *blkp++ = SAVE("prg");
- *blkp++ = SAVE("tos");
- *blkp++ = SAVE("app");
- *blkp++ = SAVE("gtp");
- *blkp++ = SAVE("csh");
- *blkp = NULL;
-
- return (blk);
- }
-
- #endif /* __MINT__ */
-