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diff --git a/contrib/tcsh/sh.c b/contrib/tcsh/sh.c
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-/* $Header: /p/tcsh/cvsroot/tcsh/sh.c,v 3.136 2007/02/22 21:57:37 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. 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.
- */
-#define EXTERN /* Intern */
-#include "sh.h"
-
-#ifndef lint
-char copyright[] =
-"@(#) Copyright (c) 1991 The Regents of the University of California.\n\
- All rights reserved.\n";
-#endif /* not lint */
-
-RCSID("$tcsh: sh.c,v 3.136 2007/02/22 21:57:37 christos Exp $")
-
-#include "tc.h"
-#include "ed.h"
-#include "tw.h"
-
-extern int MapsAreInited;
-extern int NLSMapsAreInited;
-
-/*
- * 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_t reslab INIT_ZERO_STRUCT;
-
-static const char tcshstr[] = "tcsh";
-
-struct sigaction parintr; /* Parents interrupt catch */
-struct sigaction parterm; /* Parents terminate catch */
-
-#ifdef TESLA
-int do_logout = 0;
-#endif /* TESLA */
-
-
-int use_fork = 0; /* use fork() instead of vfork()? */
-
-/*
- * Magic pointer values. Used to specify other invalid conditions aside
- * from null.
- */
-static Char INVCHAR;
-Char *INVPTR = &INVCHAR;
-Char **INVPPTR = &INVPTR;
-
-static int fast = 0;
-static int mflag = 0;
-static int prompt = 1;
-int enterhist = 0;
-int tellwhat = 0;
-time_t t_period;
-Char *ffile = NULL;
-int dolzero = 0;
-int insource = 0;
-int exitset = 0;
-static time_t chktim; /* Time mail last checked */
-char *progname;
-int tcsh;
-
-/*
- * This preserves the input state of the shell. It is used by
- * st_save and st_restore to manupulate shell state.
- */
-struct saved_state {
- int insource;
- int OLDSTD;
- int SHIN;
- int SHOUT;
- int SHDIAG;
- int intty;
- struct whyle *whyles;
- Char *gointr;
- Char *arginp;
- Char *evalp;
- Char **evalvec;
- Char *alvecp;
- Char **alvec;
- int onelflg;
- int enterhist;
- Char **argv;
- Char **av;
- Char HIST;
- int cantell;
- struct Bin B;
-};
-
-static int srccat (Char *, Char *);
-#ifndef WINNT_NATIVE
-static int srcfile (const char *, int, int, Char **);
-#else
-int srcfile (const char *, int, int, Char **);
-#endif /*WINNT_NATIVE*/
-static void srcunit (int, int, int, Char **);
-static void mailchk (void);
-#ifndef _PATH_DEFPATH
-static Char **defaultpath (void);
-#endif
-static void record (void);
-static void st_save (struct saved_state *, int, int,
- Char **, Char **);
-static void st_restore (void *);
-
- int main (int, char **);
-
-int
-main(int argc, char **argv)
-{
- int batch = 0;
- volatile int nexececho = 0;
- int nofile = 0;
- volatile int nverbose = 0;
- volatile int rdirs = 0;
- int quitit = 0;
- Char *cp;
-#ifdef AUTOLOGOUT
- Char *cp2;
-#endif
- char *tcp, *ttyn;
- int f, reenter;
- char **tempv;
- int osetintr;
- struct sigaction oparintr;
-
-#ifdef WINNT_NATIVE
- nt_init();
-#endif /* WINNT_NATIVE */
-#if defined(NLS_CATALOGS) && defined(LC_MESSAGES)
- (void) setlocale(LC_MESSAGES, "");
-#endif /* NLS_CATALOGS && LC_MESSAGES */
-
-#ifdef NLS
-# ifdef LC_CTYPE
- (void) setlocale(LC_CTYPE, ""); /* for iscntrl */
-# endif /* LC_CTYPE */
-#endif /* NLS */
-
- nlsinit();
-
-#ifdef MALLOC_TRACE
- mal_setstatsfile(fdopen(dmove(xopen("/tmp/tcsh.trace",
- O_WRONLY|O_CREAT|O_LARGEFILE, 0666), 25), "w"));
- mal_trace(1);
-#endif /* MALLOC_TRACE */
-
-#if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX)
-# ifdef _SC_CLK_TCK
- clk_tck = (clock_t) sysconf(_SC_CLK_TCK);
-# else /* ! _SC_CLK_TCK */
-# ifdef CLK_TCK
- clk_tck = CLK_TCK;
-# else /* !CLK_TCK */
- clk_tck = HZ;
-# endif /* CLK_TCK */
-# endif /* _SC_CLK_TCK */
-#endif /* !BSDTIMES && POSIX */
-
- settimes(); /* Immed. estab. timing base */
-#ifdef TESLA
- do_logout = 0;
-#endif /* TESLA */
-
- /*
- * Make sure we have 0, 1, 2 open
- * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr)
- */
- {
- do
- if ((f = xopen(_PATH_DEVNULL, O_RDONLY|O_LARGEFILE)) == -1 &&
- (f = xopen("/", O_RDONLY|O_LARGEFILE)) == -1)
- exit(1);
- while (f < 3);
- xclose(f);
- }
-
-#ifdef O_TEXT
- setmode(0, O_TEXT);
-#endif
-
- osinit(); /* Os dependent initialization */
-
-
- {
- char *t;
-
- t = strrchr(argv[0], '/');
-#ifdef WINNT_NATIVE
- {
- char *s = strrchr(argv[0], '\\');
- if (s)
- t = s;
- }
-#endif /* WINNT_NATIVE */
- t = t ? t + 1 : argv[0];
- if (*t == '-') t++;
- progname = strsave((t && *t) ? t : tcshstr); /* never want a null */
- tcsh = strcmp(progname, tcshstr) == 0;
- }
-
- /*
- * Initialize non constant strings
- */
-#ifdef _PATH_BSHELL
- STR_BSHELL = SAVE(_PATH_BSHELL);
-#endif
-#ifdef _PATH_TCSHELL
- STR_SHELLPATH = SAVE(_PATH_TCSHELL);
-#else
-# ifdef _PATH_CSHELL
- STR_SHELLPATH = SAVE(_PATH_CSHELL);
-# endif
-#endif
- STR_environ = blk2short(environ);
- environ = short2blk(STR_environ); /* So that we can free it */
- STR_WORD_CHARS = SAVE(WORD_CHARS);
-
- HIST = '!';
- HISTSUB = '^';
- PRCH = '>';
- PRCHROOT = '#';
- word_chars = STR_WORD_CHARS;
- bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */
-
- /* Default history size to 100 */
- setcopy(STRhistory, str2short("100"), VAR_READWRITE);
-
- tempv = argv;
- ffile = SAVE(tempv[0]);
- dolzero = 0;
- if (eq(ffile, STRaout)) /* A.out's are quittable */
- quitit = 1;
- uid = getuid();
- gid = getgid();
- euid = geteuid();
- egid = getegid();
- /*
- * We are a login shell if: 1. we were invoked as -<something> with
- * optional arguments 2. or we were invoked only with the -l flag
- */
- loginsh = (**tempv == '-') || (argc == 2 &&
- tempv[1][0] == '-' && tempv[1][1] == 'l' &&
- tempv[1][2] == '\0');
-#ifdef _VMS_POSIX
- /* No better way to find if we are a login shell */
- if (!loginsh) {
- loginsh = (argc == 1 && getppid() == 1);
- **tempv = '-'; /* Avoid giving VMS an acidic stomach */
- }
-#endif /* _VMS_POSIX */
-
- if (loginsh && **tempv != '-') {
- char *argv0;
-
- /*
- * Mangle the argv space
- */
- tempv[1][0] = '\0';
- tempv[1][1] = '\0';
- tempv[1] = NULL;
- argv0 = strspl("-", *tempv);
- *tempv = argv0;
- argc--;
- }
- if (loginsh) {
- (void) time(&chktim);
- setNS(STRloginsh);
- }
-
- AsciiOnly = 1;
- NoNLSRebind = getenv("NOREBIND") != NULL;
-#ifdef NLS
-# ifdef SETLOCALEBUG
- dont_free = 1;
-# endif /* SETLOCALEBUG */
- (void) setlocale(LC_ALL, "");
-# ifdef LC_COLLATE
- (void) setlocale(LC_COLLATE, "");
-# endif
-# ifdef SETLOCALEBUG
- dont_free = 0;
-# endif /* SETLOCALEBUG */
-# ifdef STRCOLLBUG
- fix_strcoll_bug();
-# endif /* STRCOLLBUG */
-
- {
- int k;
-
- for (k = 0200; k <= 0377 && !Isprint(CTL_ESC(k)); k++)
- continue;
- AsciiOnly = MB_CUR_MAX == 1 && k > 0377;
- }
-#else
- AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL;
-#endif /* NLS */
- if (MapsAreInited && !NLSMapsAreInited)
- ed_InitNLSMaps();
- ResetArrowKeys();
-
- /*
- * Initialize for periodic command intervals. Also, initialize the dummy
- * tty list for login-watch.
- */
- (void) time(&t_period);
-#ifndef HAVENOUTMP
- initwatch();
-#endif /* !HAVENOUTMP */
-
-#if defined(alliant)
- /*
- * From: Jim Pace <jdp@research.att.com>
- * tcsh does not work properly on the alliants through an rlogin session.
- * The shell generally hangs. Also, reference to the controlling terminal
- * does not work ( ie: echo foo > /dev/tty ).
- *
- * A security feature was added to rlogind affecting FX/80's Concentrix
- * from revision 5.5.xx upwards (through 5.7 where this fix was implemented)
- * This security change also affects the FX/2800 series.
- * The security change to rlogind requires the process group of an rlogin
- * session become disassociated with the tty in rlogind.
- *
- * The changes needed are:
- * 1. set the process group
- * 2. reenable the control terminal
- */
- if (loginsh && isatty(SHIN)) {
- ttyn = ttyname(SHIN);
- xclose(SHIN);
- SHIN = xopen(ttyn, O_RDWR|O_LARGEFILE);
- shpgrp = getpid();
- (void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp);
- (void) setpgid(0, shpgrp);
- }
-#endif /* alliant */
-
- /*
- * 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)) != NULL) {
- /*
- * 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)
- setv(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE);
- else
- setv(STRtty, cp = SAVE(ttyn), VAR_READWRITE);
- }
- else
- setv(STRtty, cp = SAVE(""), VAR_READWRITE);
- /*
- * 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
-# ifdef convex
- if (uid == 0)
- /* root always has a 15 minute autologout */
- setcopy(STRautologout, STRrootdefautologout, VAR_READWRITE);
- else
- if (loginsh)
- /* users get autologout set to 0 */
- setcopy(STRautologout, STR0, VAR_READWRITE);
-# else /* convex */
- if (loginsh || (uid == 0)) {
- if (*cp) {
- /* only for login shells or root and we must have a tty */
- if ((cp2 = Strrchr(cp, (Char) '/')) != NULL) {
- cp2 = cp2 + 1;
- }
- else
- cp2 = cp;
- if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) ||
- Strstr(cp, STRslptssl) != NULL)) {
- if (getenv("DISPLAY") == NULL) {
- /* NOT on X window shells */
- setcopy(STRautologout, STRdefautologout, VAR_READWRITE);
- }
- }
- }
- }
-# endif /* convex */
-#endif /* AUTOLOGOUT */
-
- sigset_interrupting(SIGALRM, queue_alrmcatch);
-
- setcopy(STRstatus, STR0, VAR_READWRITE);
-
- /*
- * get and set machine specific environment variables
- */
- getmachine();
-
-
- /*
- * Publish the selected echo style
- */
-#if ECHO_STYLE != BSD_ECHO
- if (tcsh) {
-# if ECHO_STYLE == NONE_ECHO
- setcopy(STRecho_style, STRnone, VAR_READWRITE);
-# endif /* ECHO_STYLE == NONE_ECHO */
-# if ECHO_STYLE == SYSV_ECHO
- setcopy(STRecho_style, STRsysv, VAR_READWRITE);
-# endif /* ECHO_STYLE == SYSV_ECHO */
-# if ECHO_STYLE == BOTH_ECHO
- setcopy(STRecho_style, STRboth, VAR_READWRITE);
-# endif /* ECHO_STYLE == BOTH_ECHO */
- } else
-#endif /* ECHO_STYLE != BSD_ECHO */
- setcopy(STRecho_style, STRbsd, VAR_READWRITE);
-
- /*
- * increment the shell level.
- */
- shlvl(1);
-
- if ((tcp = getenv("HOME")) != NULL)
- cp = quote(SAVE(tcp));
- else
- cp = NULL;
-
- if (cp == NULL)
- fast = 1; /* No home -> can't read scripts */
- else
- setv(STRhome, cp, VAR_READWRITE);
-
- 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, *cgr;
- struct passwd *pw;
- struct group *gr;
-
-
-#ifdef apollo
- int oid = getoid();
-
- setv(STRoid, Itoa(oid, 0, 0), VAR_READWRITE);
-#endif /* apollo */
-
- setv(STRuid, Itoa(uid, 0, 0), VAR_READWRITE);
-
- setv(STRgid, Itoa(gid, 0, 0), VAR_READWRITE);
-
- cln = getenv("LOGNAME");
- cus = getenv("USER");
- if (cus != NULL)
- setv(STRuser, quote(SAVE(cus)), VAR_READWRITE);
- else if (cln != NULL)
- setv(STRuser, quote(SAVE(cln)), VAR_READWRITE);
- else if ((pw = xgetpwuid(uid)) == NULL)
- setcopy(STRuser, str2short("unknown"), VAR_READWRITE);
- else
- setcopy(STRuser, str2short(pw->pw_name), VAR_READWRITE);
- if (cln == NULL)
- tsetenv(STRLOGNAME, varval(STRuser));
- if (cus == NULL)
- tsetenv(STRKUSER, varval(STRuser));
-
- cgr = getenv("GROUP");
- if (cgr != NULL)
- setv(STRgroup, quote(SAVE(cgr)), VAR_READWRITE);
- else if ((gr = xgetgrgid(gid)) == NULL)
- setcopy(STRgroup, str2short("unknown"), VAR_READWRITE);
- else
- setcopy(STRgroup, str2short(gr->gr_name), VAR_READWRITE);
- if (cgr == NULL)
- tsetenv(STRKGROUP, varval(STRgroup));
- }
-
- /*
- * 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 */
- tsetenv(STRHOST, str2short(cbuff));
- }
- else
- tsetenv(STRHOST, str2short("unknown"));
- }
-
-
-#ifdef REMOTEHOST
- /*
- * Try to determine the remote host we were logged in from.
- */
- remotehost();
-#endif /* REMOTEHOST */
-
-#ifdef apollo
- if ((tcp = getenv("SYSTYPE")) == NULL)
- tcp = "bsd4.3";
- tsetenv(STRSYSTYPE, quote(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.
- * Also don't edit if $TERM == wm, for when we're running under an ATK app.
- * Finally, emacs compiled under terminfo, sets the terminal to dumb,
- * so disable editing for that too.
- *
- * Unfortunately, in some cases the initial $TERM setting is "unknown",
- * "dumb", or "network" which is then changed in the user's startup files.
- * We fix this by setting noediting here if $TERM is unknown/dumb and
- * if noediting is set, we switch on editing if $TERM is changed.
- */
- if ((tcp = getenv("TERM")) != NULL) {
- setv(STRterm, quote(SAVE(tcp)), VAR_READWRITE);
- noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 ||
- strcmp(tcp, "network") == 0;
- editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 &&
- !noediting;
- }
- else {
- noediting = 0;
- 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)
- setNS(STRedit);
-
-
- /*
- * still more mutability: make the complete routine automatically add the
- * suffix of file names...
- */
- setNS(STRaddsuffix);
-
- /*
- * Compatibility with tcsh >= 6.12 by default
- */
- setNS(STRcsubstnonl);
-
- /*
- * Random default kill ring size
- */
- setcopy(STRkillring, str2short("30"), VAR_READWRITE);
-
- /*
- * Re-initialize path if set in environment
- */
- if ((tcp = getenv("PATH")) == NULL)
-#ifdef _PATH_DEFPATH
- importpath(str2short(_PATH_DEFPATH));
-#else /* !_PATH_DEFPATH */
- setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE);
-#endif /* _PATH_DEFPATH */
- else
- /* Importpath() allocates memory for the path, and the
- * returned pointer from SAVE() was discarded, so
- * this was a memory leak.. (sg)
- *
- * importpath(SAVE(tcp));
- */
- importpath(str2short(tcp));
-
-
- {
- /* If the SHELL environment variable ends with "tcsh", set
- * STRshell to the same path. This is to facilitate using
- * the executable in environments where the compiled-in
- * default isn't appropriate (sg).
- */
-
- size_t sh_len = 0;
-
- if ((tcp = getenv("SHELL")) != NULL) {
- sh_len = strlen(tcp);
- if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) ||
- (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0))
- setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE);
- else
- sh_len = 0;
- }
- if (sh_len == 0)
- setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE);
- }
-
-#ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */
- if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL)
- tcp = "SHELL";
- tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp)));
-#endif /* _OSD_POSIX */
-
-#ifdef COLOR_LS_F
- if ((tcp = getenv("LS_COLORS")) != NULL)
- parseLS_COLORS(str2short(tcp));
-#endif /* COLOR_LS_F */
-
- doldol = putn((int) getpid()); /* For $$ */
-#ifdef WINNT_NATIVE
- {
- char *tmp;
- Char *tmp2;
- if ((tmp = getenv("TMP")) != NULL) {
- tmp = xasprintf("%s/%s", tmp, "sh");
- tmp2 = SAVE(tmp);
- xfree(tmp);
- }
- else {
- tmp2 = SAVE("");
- }
- shtemp = Strspl(tmp2, doldol); /* For << */
- xfree(tmp2);
- }
-#else /* !WINNT_NATIVE */
- shtemp = Strspl(STRtmpsh, doldol); /* For << */
-#endif /* WINNT_NATIVE */
-
- /*
- * 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.
- */
- sigaction(SIGINT, NULL, &parintr);
- sigaction(SIGTERM, NULL, &parterm);
-
-
-#ifdef TCF
- /* Enable process migration on ourselves and our progeny */
- (void) signal(SIGMIGRATE, SIG_DFL);
-#endif /* TCF */
-
- /*
- * dspkanji/dspmbyte autosetting
- */
- /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */
-#if defined(DSPMBYTE)
-#if defined(NLS) && defined(LC_CTYPE)
- if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR)) {
-#else
- if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) {
-#endif
- autoset_dspmbyte(str2short(tcp));
- }
-#if defined(WINNT_NATIVE)
- else if (!adrof(CHECK_MBYTEVAR))
- nt_autoset_dspmbyte();
-#endif /* WINNT_NATIVE */
-#endif
-
- fix_version(); /* publish the shell version */
-
- if (argc > 1 && strcmp(argv[1], "--version") == 0) {
- xprintf("%S\n", varval(STRversion));
- xexit(0);
- }
- if (argc > 1 && strcmp(argv[1], "--help") == 0) {
- xprintf("%S\n\n", varval(STRversion));
- xprintf(CGETS(11, 8, HELP_STRING));
- xexit(0);
- }
- /*
- * 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++;
-#ifdef M_XENIX
- /* Xenix Vi bug:
- it relies on a 7 bit environment (/bin/sh), so it
- pass ascii arguments with the 8th bit set */
- if (!strcmp(argv[0], "sh"))
- {
- char *p;
-
- for (p = tempv[0]; *p; ++p)
- *p &= ASCII;
- }
-#endif
- arginp = SAVE(tempv[0]);
-
- /*
- * we put the command into a variable
- */
- if (arginp != NULL)
- setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE);
-
- /*
- * * Give an error on -c arguments that end in * backslash to
- * ensure that you don't make * nonportable csh scripts.
- */
- {
- int count;
-
- cp = Strend(arginp);
- count = 0;
- while (cp > arginp && *--cp == '\\')
- ++count;
- if ((count & 1) != 0) {
- exiterr = 1;
- stderror(ERR_ARGC);
- }
- }
- prompt = 0;
- nofile = 1;
- break;
- case 'd': /* -d Load directory stack from file */
- rdirs = 1;
- break;
-
-#ifdef apollo
- case 'D': /* -D Define environment variable */
- {
- Char *dp;
-
- cp = str2short(tcp);
- if (dp = Strchr(cp, '=')) {
- *dp++ = '\0';
- tsetenv(cp, dp);
- }
- else
- tsetenv(cp, STRNULL);
- }
- *tcp = '\0'; /* done with this argument */
- break;
-#endif /* apollo */
-
- 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;
-
- case 'F':
- /*
- * This will cause children to be created using fork instead of
- * vfork.
- */
- use_fork = 1;
- break;
-
- case ' ':
- case '\t':
- /*
- * for O/S's that don't do the argument parsing right in
- * "#!/foo -f " scripts
- */
- break;
-
- default: /* Unknown command option */
- exiterr = 1;
- stderror(ERR_TCSHUSAGE, tcp-1, progname);
- break;
-
- } 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) {
- nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE);
- if (nofile < 0) {
- child = 1; /* So this ... */
- /* ... doesn't return */
- stderror(ERR_SYSTEM, tempv[0], strerror(errno));
- }
-#ifdef O_TEXT
- setmode(nofile, O_TEXT);
-#endif
- xfree(ffile);
- dolzero = 1;
- 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;
- }
- (void) close_on_exec(SHIN, 1);
- prompt = 0;
- /* argc not used any more */ tempv++;
- }
-
- /*
- * Call to closem() used to be part of initdesc(). Now called below where
- * the script name argument has become stdin. Kernel may have used a file
- * descriptor to hold the name of the script (setuid case) and this name
- * mustn't be lost by closing the fd too soon.
- */
- closem();
-
- /*
- * 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;
-#ifndef convex
- if (intty || (intact && isatty(SHOUT))) {
- if (!batch && (uid != euid || gid != egid)) {
- errno = EACCES;
- child = 1; /* So this ... */
- /* ... doesn't return */
- stderror(ERR_SYSTEM, progname, strerror(errno));
- }
- }
-#endif /* convex */
- 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, VAR_READWRITE);
-
- /*
- * Set up the prompt.
- */
- if (prompt) {
- if (tcsh)
- setcopy(STRprompt, STRdeftcshprompt, VAR_READWRITE);
- else
- setcopy(STRprompt, STRdefcshprompt, VAR_READWRITE);
- /* that's a meta-questionmark */
- setcopy(STRprompt2, STRmquestion, VAR_READWRITE);
- setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE);
- }
-
- /*
- * If we are an interactive shell, then start fiddling with the signals;
- * this is a tricky game.
- */
- shpgrp = mygetpgrp();
- opgrp = tpgrp = -1;
- if (setintr) {
- struct sigaction osig;
-
- **argv = '-';
- if (!quitit) /* Wary! */
- (void) signal(SIGQUIT, SIG_IGN);
- pintr_disabled = 1;
- sigset_interrupting(SIGINT, queue_pintr);
- (void) signal(SIGTERM, SIG_IGN);
-
- /*
- * No reason I can see not to save history on all these events..
- * Most usual occurrence is in a window system, where we're not a login
- * shell, but might as well be... (sg)
- * But there might be races when lots of shells exit together...
- * [this is also incompatible].
- * We have to be mre careful here. If the parent wants to
- * ignore the signals then we leave them untouched...
- * We also only setup the handlers for shells that are trully
- * interactive.
- */
- sigaction(SIGHUP, NULL, &osig);
- if (loginsh || osig.sa_handler != SIG_IGN)
- /* exit processing on HUP */
- sigset_interrupting(SIGHUP, queue_phup);
-#ifdef SIGXCPU
- sigaction(SIGXCPU, NULL, &osig);
- if (loginsh || osig.sa_handler != SIG_IGN)
- /* exit processing on XCPU */
- sigset_interrupting(SIGXCPU, queue_phup);
-#endif
-#ifdef SIGXFSZ
- sigaction(SIGXFSZ, NULL, &osig);
- if (loginsh || osig.sa_handler != SIG_IGN)
- /* exit processing on XFSZ */
- sigset_interrupting(SIGXFSZ, queue_phup);
-#endif
-
- 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 */
-#ifdef BSDJOBS /* if we have tty job control */
- retry:
- if ((tpgrp = tcgetpgrp(f)) != -1) {
- if (tpgrp != shpgrp) {
- struct sigaction old;
-
- sigaction(SIGTTIN, NULL, &old);
- signal(SIGTTIN, SIG_DFL);
- (void) kill(0, SIGTTIN);
- sigaction(SIGTTIN, &old, NULL);
- 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
- (void) close_on_exec(dcopy(f, FSHTTY), 1);
- }
- else
- tpgrp = -1;
- }
- if (tpgrp == -1) {
- notty:
- xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"),
- strerror(errno));
- xprintf(CGETS(11, 2, "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.sa_handler == SIG_DFL)
- setintr = 1;
-
-/*
- * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the
- * handler is installed with signal(2) or sigset(2). sigaction(2) must
- * be used instead.
- *
- * David Dawes (dawes@physics.su.oz.au) Sept 1991
- */
- sigset_interrupting(SIGCHLD, queue_pchild);
-
- if (intty && !arginp)
- (void) ed_Setup(editing);/* Get the tty state, and set defaults */
- /* Only alter the tty state if editing */
-
- /*
- * Set an exit here in case of an interrupt or error reading the shell
- * start-up scripts.
- */
- osetintr = setintr;
- oparintr = parintr;
- (void)cleanup_push_mark(); /* There is no outer handler */
- if (setexit() != 0) /* PWP */
- reenter = 1;
- else
- reenter = 0;
- exitset++;
- haderr = 0; /* In case second time through */
- if (!fast && reenter == 0) {
- /* Will have varval(STRhome) here because set fast if don't */
- {
- pintr_disabled++;
- cleanup_push(&pintr_disabled, disabled_cleanup);
- setintr = 0;/*FIXRESET:cleanup*/
- /* onintr in /etc/ files has no effect */
- parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/
-#ifdef LOGINFIRST
-#ifdef _PATH_DOTLOGIN
- if (loginsh)
- (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
-#endif
-#endif
-
-#ifdef _PATH_DOTCSHRC
- (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL);
-#endif
- if (!arginp && !onelflg && !havhash)
- dohash(NULL,NULL);
-#ifndef LOGINFIRST
-#ifdef _PATH_DOTLOGIN
- if (loginsh)
- (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
-#endif
-#endif
- cleanup_until(&pintr_disabled);
- setintr = osetintr;
- parintr = oparintr;
- }
-#ifdef LOGINFIRST
- if (loginsh)
- (void) srccat(varval(STRhome), STRsldotlogin);
-#endif
- /* upward compat. */
- if (!srccat(varval(STRhome), STRsldottcshrc))
- (void) srccat(varval(STRhome), STRsldotcshrc);
-
- if (!arginp && !onelflg && !havhash)
- dohash(NULL,NULL);
-
- /*
- * Source history before .login so that it is available in .login
- */
- loadhist(NULL, 0);
-#ifndef LOGINFIRST
- if (loginsh)
- (void) srccat(varval(STRhome), STRsldotlogin);
-#endif
- if (loginsh || rdirs)
- loaddirs(NULL);
- }
- /* Reset interrupt flag */
- setintr = osetintr;
- parintr = oparintr;
- exitset--;
-
- /* 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");
- xclose(SHIN);
- child = 1;
-#ifdef TESLA
- do_logout = 1;
-#endif /* TESLA */
- goodbye(NULL, NULL);
- }
- else {
- xprintf("exit\n");
- }
- }
- record();
- exitstat();
- return (0);
-}
-
-void
-untty(void)
-{
-#ifdef BSDJOBS
- if (tpgrp > 0 && opgrp != shpgrp) {
- (void) setpgid(0, opgrp);
- (void) tcsetpgrp(FSHTTY, opgrp);
- (void) resetdisc(FSHTTY);
- }
-#endif /* BSDJOBS */
-}
-
-void
-importpath(Char *cp)
-{
- size_t i = 0;
- Char *dp;
- Char **pv;
- int c;
-
- for (dp = cp; *dp; dp++)
- if (*dp == PATHSEP)
- 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 = xcalloc(i + 2, sizeof(Char *));
- dp = cp;
- i = 0;
- if (*dp)
- for (;;) {
- if ((c = *dp) == PATHSEP || c == 0) {
- *dp = 0;
- pv[i++] = Strsave(*cp ? cp : STRdot);
- if (c) {
- cp = dp + 1;
- *dp = PATHSEP;
- }
- else
- break;
- }
-#ifdef WINNT_NATIVE
- else if (*dp == '\\')
- *dp = '/';
-#endif /* WINNT_NATIVE */
- dp++;
- }
- pv[i] = 0;
- cleanup_push(pv, blk_cleanup);
- setq(STRpath, pv, &shvhed, VAR_READWRITE);
- cleanup_ignore(pv);
- cleanup_until(pv);
-}
-
-/*
- * Source to the file which is the catenation of the argument names.
- */
-static int
-srccat(Char *cp, Char *dp)
-{
- if (cp[0] == '/' && cp[1] == '\0')
- return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL);
- else {
- Char *ep;
- char *ptr;
- int rv;
-
-#ifdef WINNT_NATIVE
- ep = Strend(cp);
- if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */
- dp++;
-#endif /* WINNT_NATIVE */
-
- ep = Strspl(cp, dp);
- cleanup_push(ep, xfree);
- ptr = short2str(ep);
-
- rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL);
- cleanup_until(ep);
- return rv;
- }
-}
-
-/*
- * Source to a file putting the file descriptor in a safe place (> 2).
- */
-#ifndef WINNT_NATIVE
-static int
-#else
-int
-#endif /*WINNT_NATIVE*/
-srcfile(const char *f, int onlyown, int flag, Char **av)
-{
- int unit;
-
- if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1)
- return 0;
-#ifdef O_TEXT
- setmode(unit, O_TEXT);
-#endif
- cleanup_push(&unit, open_cleanup);
- unit = dmove(unit, -1);
- cleanup_ignore(&unit);
- cleanup_until(&unit);
-
- (void) close_on_exec(unit, 1);
- srcunit(unit, onlyown, flag, av);
- return 1;
-}
-
-
-/*
- * Save the shell state, and establish new argument vector, and new input
- * fd.
- */
-static void
-st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av)
-{
- st->insource = insource;
- st->SHIN = SHIN;
- /* Want to preserve the meaning of "source file >output".
- * Save old descriptors, move new 0,1,2 to safe places and assign
- * them to SH* and let process() redo 0,1,2 from them.
- *
- * The macro returns true if d1 and d2 are good and they point to
- * different things. If you don't avoid saving duplicate
- * descriptors, you really limit the depth of "source" recursion
- * you can do because of all the open file descriptors. -IAN!
- */
-#define NEED_SAVE_FD(d1,d2) \
- (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \
- && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) )
-
- st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */
- if (didfds) {
- struct stat s1, s2;
- if (NEED_SAVE_FD(0,OLDSTD)) {
- st->OLDSTD = OLDSTD;
- OLDSTD = dmove(0, -1);
- (void)close_on_exec(OLDSTD, 1);
- }
- if (NEED_SAVE_FD(1,SHOUT)) {
- st->SHOUT = SHOUT;
- SHOUT = dmove(1, -1);
- (void)close_on_exec(SHOUT, 1);
- }
- if (NEED_SAVE_FD(2,SHDIAG)) {
- st->SHDIAG = SHDIAG;
- SHDIAG = dmove(2, -1);
- (void)close_on_exec(SHDIAG, 1);
- }
- donefds();
- }
-
- st->intty = intty;
- st->whyles = whyles;
- st->gointr = gointr;
- st->arginp = arginp;
- st->evalp = evalp;
- st->evalvec = evalvec;
- st->alvecp = alvecp;
- st->alvec = alvec;
- st->onelflg = onelflg;
- st->enterhist = enterhist;
- if (hflg)
- st->HIST = HIST;
- else
- st->HIST = '\0';
- st->cantell = cantell;
- cpybin(st->B, B);
-
- /*
- * we can now pass arguments to source.
- * For compatibility we do that only if arguments were really
- * passed, otherwise we keep the old, global $argv like before.
- */
- if (av != NULL && *av != NULL) {
- struct varent *vp;
- if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL)
- st->argv = saveblk(vp->vec);
- else
- st->argv = NULL;
- setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE);
- }
- else
- st->argv = NULL;
- st->av = av;
-
- SHIN = unit; /* Do this first */
-
- /* Establish new input arena */
- {
- fbuf = NULL;
- fseekp = feobp = fblocks = 0;
- settell();
- }
-
- arginp = 0;
- onelflg = 0;
- intty = isatty(SHIN);
- whyles = 0;
- gointr = 0;
- evalvec = 0;
- evalp = 0;
- alvec = al;
- alvecp = 0;
- enterhist = hflg;
- if (enterhist)
- HIST = '\0';
- insource = 1;
-}
-
-
-/*
- * Restore the shell to a saved state
- */
-static void
-st_restore(void *xst)
-{
- struct saved_state *st;
-
- st = xst;
- if (st->SHIN == -1)
- return;
-
- /* Reset input arena */
- {
- int i;
- Char** nfbuf = fbuf;
- int nfblocks = fblocks;
-
- fblocks = 0;
- fbuf = NULL;
- for (i = 0; i < nfblocks; i++)
- xfree(nfbuf[i]);
- xfree(nfbuf);
- }
- cpybin(B, st->B);
-
- xclose(SHIN);
-
- insource = st->insource;
- SHIN = st->SHIN;
- if (st->OLDSTD != -1)
- xclose(OLDSTD), OLDSTD = st->OLDSTD;
- if (st->SHOUT != -1)
- xclose(SHOUT), SHOUT = st->SHOUT;
- if (st->SHDIAG != -1)
- xclose(SHDIAG), SHDIAG = st->SHDIAG;
- arginp = st->arginp;
- onelflg = st->onelflg;
- evalp = st->evalp;
- evalvec = st->evalvec;
- alvecp = st->alvecp;
- alvec = st->alvec;
- intty = st->intty;
- whyles = st->whyles;
- gointr = st->gointr;
- if (st->HIST != '\0')
- HIST = st->HIST;
- enterhist = st->enterhist;
- cantell = st->cantell;
-
- if (st->argv != NULL)
- setq(STRargv, st->argv, &shvhed, VAR_READWRITE);
- else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL)
- unsetv(STRargv);
-}
-
-/*
- * 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.
- */
-static void
-srcunit(int unit, int onlyown, int hflg, Char **av)
-{
- struct saved_state st;
-
- st.SHIN = -1; /* st_restore checks this */
-
- if (unit < 0)
- return;
-
- if (onlyown) {
- struct stat stb;
-
- if (fstat(unit, &stb) < 0) {
- xclose(unit);
- return;
- }
- }
-
- /* Does nothing before st_save() because st.SHIN == -1 */
- cleanup_push(&st, st_restore);
- if (setintr) {
- pintr_disabled++;
- cleanup_push(&pintr_disabled, disabled_cleanup);
- }
-
- /* Save the current state and move us to a new state */
- st_save(&st, unit, hflg, NULL, av);
-
- /*
- * Now if we are allowing commands to be interrupted, we let ourselves be
- * interrupted.
- */
- if (setintr) {
- cleanup_until(&pintr_disabled);
- pintr_disabled++;
- cleanup_push(&pintr_disabled, disabled_cleanup);
- }
-
- process(0); /* 0 -> blow away on errors */
-
- /* Restore the old state */
- cleanup_until(&st);
-}
-
-
-/*ARGSUSED*/
-void
-goodbye(Char **v, struct command *c)
-{
- USE(v);
- USE(c);
- record();
-
- if (loginsh) {
- size_t omark;
- sigset_t set;
-
- signal(SIGQUIT, SIG_IGN);
- sigaddset(&set, SIGQUIT);
- sigprocmask(SIG_UNBLOCK, &set, NULL);
- signal(SIGINT, SIG_IGN);
- sigaddset(&set, SIGINT);
- signal(SIGTERM, SIG_IGN);
- sigaddset(&set, SIGTERM);
- signal(SIGHUP, SIG_IGN);
- sigaddset(&set, SIGHUP);
- sigprocmask(SIG_UNBLOCK, &set, NULL);
- phup_disabled = 1;
- setintr = 0; /* No interrupts after "logout" */
- /* Trap errors inside .logout */
- omark = cleanup_push_mark();
- if (setexit() == 0) {
- if (!(adrof(STRlogout)))
- setcopy(STRlogout, STRnormal, VAR_READWRITE);
-#ifdef _PATH_DOTLOGOUT
- (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
-#endif
- if (adrof(STRhome))
- (void) srccat(varval(STRhome), STRsldtlogout);
-#ifdef TESLA
- do_logout = 1;
-#endif /* TESLA */
- }
- cleanup_pop_mark(omark);
- }
- exitstat();
-}
-
-void
-exitstat(void)
-{
-#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;
-
- xexit(getn(varval(STRstatus)));
-}
-
-/*
- * in the event of a HUP we want to save the history
- */
-void
-phup(void)
-{
- if (loginsh) {
- setcopy(STRlogout, STRhangup, VAR_READWRITE);
-#ifdef _PATH_DOTLOGOUT
- (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
-#endif
- if (adrof(STRhome))
- (void) srccat(varval(STRhome), STRsldtlogout);
- }
-
- record();
-
-#ifdef POSIXJOBS
- /*
- * We kill the last foreground process group. It then becomes
- * responsible to propagate the SIGHUP to its progeny.
- */
- {
- struct process *pp, *np;
-
- for (pp = proclist.p_next; pp; pp = pp->p_next) {
- np = pp;
- /*
- * Find if this job is in the foreground. It could be that
- * the process leader has exited and the foreground flag
- * is cleared for it.
- */
- do
- /*
- * If a process is in the foreground we try to kill
- * it's process group. If we succeed, then the
- * whole job is gone. Otherwise we keep going...
- * But avoid sending HUP to the shell again.
- */
- if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) {
- np->p_flags &= ~PHUP;
- if (killpg(np->p_jobid, SIGHUP) != -1) {
- /* In case the job was suspended... */
-#ifdef SIGCONT
- (void) killpg(np->p_jobid, SIGCONT);
-#endif
- break;
- }
- }
- while ((np = np->p_friends) != pp);
- }
- }
-#endif /* POSIXJOBS */
-
- xexit(SIGHUP);
-}
-
-static 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) */
-
-void
-pintr(void)
-{
- just_signaled = 1;
- pintr1(1);
-}
-
-void
-pintr1(int wantnl)
-{
- if (setintr) {
- if (pjobs) {
- pjobs = 0;
- xputchar('\n');
- dojobs(jobargv, NULL);
- stderror(ERR_NAME | ERR_INTR);
- }
- }
- /* MH - handle interrupted completions specially */
- {
- if (InsideCompletion)
- stderror(ERR_SILENT);
- }
- /* JV - Make sure we shut off inputl */
- {
- (void) Cookedmode();
- GettingInput = 0;
- }
- drainoline();
-#ifdef HAVE_GETPWENT
- (void) endpwent();
-#endif
-
- /*
- * 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) {
- gotolab(gointr);
- reset();
- }
- else if (intty && wantnl) {
- if (editing) {
- /*
- * If we are editing a multi-line input command, and move to
- * the beginning of the line, we don't want to trash it when
- * we hit ^C
- */
- PastBottom();
- ClearLines();
- ClearDisp();
- }
- else {
- /* xputchar('\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.
- */
-void
-process(int catch)
-{
- jmp_buf_t osetexit;
- /* PWP: This might get nuked my longjmp so don't make it a register var */
- size_t omark;
-
- getexit(osetexit);
- omark = cleanup_push_mark();
- exitset++;
- for (;;) {
- struct command *t;
- int hadhist, old_pintr_disabled;
-
- (void) setexit();
- pendjob();
-
- justpr = enterhist; /* execute if not entering history */
-
- if (haderr) {
- if (!catch) {
- /* unwind */
- doneinp = 0;
- cleanup_pop_mark(omark);
- 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) {
- just_signaled = 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.
- */
-#ifndef HAVENOUTMP
- watch_login(0);
-#endif /* !HAVENOUTMP */
- 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 && aret == TCSH_F_SEEK)
- printprompt(0, NULL);
- flush();
- setalarm(1);
- }
- if (seterr) {
- xfree(seterr);
- seterr = NULL;
- }
-
- /*
- * Interruptible during interactive reads
- */
- if (setintr)
- pintr_push_enable(&old_pintr_disabled);
- hadhist = lex(&paraml);
- if (setintr)
- cleanup_until(&old_pintr_disabled);
- cleanup_push(&paraml, lex_cleanup);
-
- /*
- * Echo not only on VERBOSE, but also with history expansion. If there
- * is a lexical error then we forego history echo.
- */
- if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) ||
- adrof(STRverbose)) {
- int odidfds = didfds;
- haderr = 1;
- didfds = 0;
- prlex(&paraml);
- flush();
- haderr = 0;
- didfds = odidfds;
- }
- (void) alarm(0); /* Autologout OFF */
- alrmcatch_disabled = 1;
-
- /*
- * 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 && !arun))
- savehist(&paraml, enterhist > 1);
-
- 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)
- goto cmd_done;
-
- /*
- * If had a tellwhat from twenex() then do
- */
- if (tellwhat) {
- (void) tellmewhat(&paraml, NULL);
- goto cmd_done;
- }
-
- alias(&paraml);
-
-#ifdef BSDJOBS
- /*
- * If we are interactive, try to continue jobs that we have stopped
- */
- if (prompt)
- continue_jobs(&paraml);
-#endif /* BSDJOBS */
-
- /*
- * Check to see if the user typed "rm * .o" or something
- */
- if (prompt)
- rmstar(&paraml);
- /*
- * Parse the words of the input into a parse tree.
- */
- t = syntax(paraml.next, &paraml, 0);
- cleanup_push(t, syntax_cleanup);
- if (seterr)
- stderror(ERR_OLD);
-
- postcmd();
- /*
- * Execute the parse tree From: Michael Schroeder
- * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp);
- */
- execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE);
-
- /*
- * Made it!
- */
-#ifdef SIG_WINDOW
- if (windowchg || (catch && intty && !whyles && !tellwhat)) {
- (void) check_window_size(0); /* for window systems */
- }
-#endif /* SIG_WINDOW */
- setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB);
- cmd_done:
- cleanup_until(&paraml);
- }
- exitset--;
- cleanup_pop_mark(omark);
- resexit(osetexit);
-}
-
-/*ARGSUSED*/
-void
-dosource(Char **t, struct command *c)
-{
- Char *f;
- int hflg = 0;
- char *file;
-
- USE(c);
- t++;
- if (*t && eq(*t, STRmh)) {
- if (*++t == NULL)
- stderror(ERR_NAME | ERR_HFLAG);
- hflg++;
- }
- else if (*t && eq(*t, STRmm)) {
- if (*++t == NULL)
- stderror(ERR_NAME | ERR_MFLAG);
- hflg = 2;
- }
-
- f = globone(*t++, G_ERROR);
- file = strsave(short2str(f));
- cleanup_push(file, xfree);
- xfree(f);
- t = glob_all_or_error(t);
- if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet))
- stderror(ERR_SYSTEM, file, strerror(errno));
- cleanup_until(file);
-}
-
-/*
- * 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."
- */
-
-/*
- * The AMS version.
- * This version checks if the file is a directory, and if so,
- * tells you the number of files in it, otherwise do the old thang.
- * The magic "+1" in the time calculation is to compensate for
- * an AFS bug where directory mtimes are set to 1 second in
- * the future.
- */
-
-static void
-mailchk(void)
-{
- struct varent *v;
- Char **vp;
- time_t t;
- int intvl, cnt;
- struct stat stb;
- int new;
-
- v = adrof(STRmail);
- if (v == NULL || v->vec == NULL)
- 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++) {
- char *filename = short2str(*vp);
- char *mboxdir = filename;
-
- if (stat(filename, &stb) < 0)
- continue;
-#if defined(BSDTIMES) || defined(_SEQUENT_)
- new = stb.st_mtime > time0.tv_sec;
-#else
- new = stb.st_mtime > seconds0;
-#endif
- if (S_ISDIR(stb.st_mode)) {
- DIR *mailbox;
- int mailcount = 0;
- char *tempfilename;
- struct stat stc;
-
- tempfilename = xasprintf("%s/new", filename);
-
- if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) {
- /*
- * "filename/new" exists and is a directory; you are
- * using Qmail.
- */
- stb = stc;
-#if defined(BSDTIMES) || defined(_SEQUENT_)
- new = stb.st_mtime > time0.tv_sec;
-#else
- new = stb.st_mtime > seconds0;
-#endif
- mboxdir = tempfilename;
- }
-
- if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) {
- xfree(tempfilename);
- continue;
- }
-
- mailbox = opendir(mboxdir);
- xfree(tempfilename);
- if (mailbox == NULL)
- continue;
-
- /* skip . and .. */
- if (!readdir(mailbox) || !readdir(mailbox))
- continue;
-
- while (readdir(mailbox))
- mailcount++;
-
- if (mailcount == 0)
- continue;
-
- if (cnt == 1)
- xprintf(CGETS(11, 3, "You have %d mail messages.\n"),
- mailcount);
- else
- xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"),
- mailcount, filename);
- }
- else {
- char *type;
-
- if (stb.st_size == 0 || stb.st_atime > stb.st_mtime ||
- (stb.st_atime <= chktim && stb.st_mtime <= chktim) ||
- (loginsh && !new))
- continue;
- type = strsave(new ? CGETS(11, 6, "new ") : "");
- cleanup_push(type, xfree);
- if (cnt == 1)
- xprintf(CGETS(11, 5, "You have %smail.\n"), type);
- else
- xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename);
- cleanup_until(type);
- }
- }
- 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 return home directory of the user, or NULL.
- */
-Char *
-gethdir(const Char *home)
-{
- Char *h;
-
- /*
- * Is it us?
- */
- if (*home == '\0') {
- if ((h = varval(STRhome)) != STRNULL)
- return Strsave(h);
- else
- return NULL;
- }
-
- /*
- * Look in the cache
- */
- if ((h = gettilde(home)) == NULL)
- return NULL;
- else
- return Strsave(h);
-}
-
-/*
- * Move the initial descriptors to their eventual
- * resting places, closing all other units.
- */
-void
-initdesc(void)
-{
-#ifdef NLS_BUGS
-#ifdef NLS_CATALOGS
- nlsclose();
-#endif /* NLS_CATALOGS */
-#endif /* NLS_BUGS */
-
-
- didfds = 0; /* 0, 1, 2 aren't set up */
- (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1);
- (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1);
- (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1);
- (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1);
-#ifndef CLOSE_ON_EXEC
- didcch = 0; /* Havent closed for child */
-#endif /* CLOSE_ON_EXEC */
- isdiagatty = isatty(SHDIAG);
- isoutatty = isatty(SHOUT);
-#ifdef NLS_BUGS
-#ifdef NLS_CATALOGS
- nlsinit();
-#endif /* NLS_CATALOGS */
-#endif /* NLS_BUGS */
-}
-
-
-void
-#ifdef PROF
-done(int i)
-#else
-xexit(int i)
-#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 */
-
- {
- struct process *pp, *np;
-
- /* Kill all processes marked for hup'ing */
- for (pp = proclist.p_next; pp; pp = pp->p_next) {
- np = pp;
- do
- if ((np->p_flags & PHUP) && np->p_jobid != shpgrp) {
- if (killpg(np->p_jobid, SIGHUP) != -1) {
- /* In case the job was suspended... */
-#ifdef SIGCONT
- (void) killpg(np->p_jobid, SIGCONT);
-#endif
- break;
- }
- }
- while ((np = np->p_friends) != pp);
- }
- }
- untty();
-#ifdef NLS_CATALOGS
- /*
- * We need to call catclose, because SVR4 leaves symlinks behind otherwise
- * in the catalog directories. We cannot close on a vforked() child,
- * because messages will stop working on the parent too.
- */
- if (child == 0)
- nlsclose();
-#endif /* NLS_CATALOGS */
-#ifdef WINNT_NATIVE
- nt_cleanup();
-#endif /* WINNT_NATIVE */
- _exit(i);
-}
-
-#ifndef _PATH_DEFPATH
-static Char **
-defaultpath(void)
-{
- char *ptr;
- Char **blk, **blkp;
- struct stat stb;
-
- blkp = blk = xmalloc(sizeof(Char *) * 10);
-
-#ifndef NODOT
-# ifndef DOTLAST
- *blkp++ = Strsave(STRdot);
-# endif
-#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
-
-#ifndef NODOT
-# ifdef DOTLAST
- *blkp++ = Strsave(STRdot);
-# endif
-#endif
- *blkp = NULL;
- return (blk);
-}
-#endif
-
-static void
-record(void)
-{
- if (!fast) {
- recdirs(NULL, adrof(STRsavedirs) != NULL);
- rechist(NULL, adrof(STRsavehist) != NULL);
- }
-}
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