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-rw-r--r--bin/csh/lex.c1643
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diff --git a/bin/csh/lex.c b/bin/csh/lex.c
deleted file mode 100644
index 6ea61ac..0000000
--- a/bin/csh/lex.c
+++ /dev/null
@@ -1,1643 +0,0 @@
-/*-
- * Copyright (c) 1980, 1991, 1993
- * 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.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)lex.c 8.1 (Berkeley) 5/31/93";
-#else
-static const char rcsid[] =
- "$FreeBSD$";
-#endif
-#endif /* not lint */
-
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <termios.h>
-#include <errno.h>
-#include <string.h>
-#include <unistd.h>
-#if __STDC__
-# include <stdarg.h>
-#else
-# include <varargs.h>
-#endif
-
-#include "csh.h"
-#include "extern.h"
-
-/*
- * These lexical routines read input and form lists of words.
- * There is some involved processing here, because of the complications
- * of input buffering, and especially because of history substitution.
- */
-
-static Char *word __P((void));
-static int getC1 __P((int));
-static void getdol __P((void));
-static void getexcl __P((int));
-static struct Hist
- *findev __P((Char *, bool));
-static void setexclp __P((Char *));
-static int bgetc __P((void));
-static void bfree __P((void));
-static struct wordent
- *gethent __P((int));
-static int matchs __P((Char *, Char *));
-static int getsel __P((int *, int *, int));
-static struct wordent
- *getsub __P((struct wordent *));
-static Char *subword __P((Char *, int, bool *));
-static struct wordent
- *dosub __P((int, struct wordent *, bool));
-
-/*
- * Peekc is a peek character for getC, peekread for readc.
- * There is a subtlety here in many places... history routines
- * will read ahead and then insert stuff into the input stream.
- * If they push back a character then they must push it behind
- * the text substituted by the history substitution. On the other
- * hand in several places we need 2 peek characters. To make this
- * all work, the history routines read with getC, and make use both
- * of ungetC and unreadc. The key observation is that the state
- * of getC at the call of a history reference is such that calls
- * to getC from the history routines will always yield calls of
- * readc, unless this peeking is involved. That is to say that during
- * getexcl the variables lap, exclp, and exclnxt are all zero.
- *
- * Getdol invokes history substitution, hence the extra peek, peekd,
- * which it can ungetD to be before history substitutions.
- */
-static Char peekc = 0, peekd = 0;
-static Char peekread = 0;
-
-/* (Tail of) current word from ! subst */
-static Char *exclp = NULL;
-
-/* The rest of the ! subst words */
-static struct wordent *exclnxt = NULL;
-
-/* Count of remaining words in ! subst */
-static int exclc = 0;
-
-/* "Globp" for alias resubstitution */
-Char *alvecp = NULL;
-int aret = F_SEEK;
-
-/*
- * Labuf implements a general buffer for lookahead during lexical operations.
- * Text which is to be placed in the input stream can be stuck here.
- * We stick parsed ahead $ constructs during initial input,
- * process id's from `$$', and modified variable values (from qualifiers
- * during expansion in sh.dol.c) here.
- */
-static Char labuf[BUFSIZ];
-
-/*
- * Lex returns to its caller not only a wordlist (as a "var" parameter)
- * but also whether a history substitution occurred. This is used in
- * the main (process) routine to determine whether to echo, and also
- * when called by the alias routine to determine whether to keep the
- * argument list.
- */
-static bool hadhist = 0;
-
-/*
- * Avoid alias expansion recursion via \!#
- */
-int hleft;
-
-static Char getCtmp;
-
-#define getC(f) ((getCtmp = peekc) ? (peekc = 0, getCtmp) : getC1(f))
-#define ungetC(c) peekc = c
-#define ungetD(c) peekd = c
-
-int
-lex(hp)
- struct wordent *hp;
-{
- struct wordent *wdp;
- int c;
-
- btell(&lineloc);
- hp->next = hp->prev = hp;
- hp->word = STRNULL;
- hadhist = 0;
- do
- c = readc(0);
- while (c == ' ' || c == '\t');
- if (c == HISTSUB && intty)
- /* ^lef^rit from tty is short !:s^lef^rit */
- getexcl(c);
- else
- unreadc(c);
- wdp = hp;
- /*
- * The following loop is written so that the links needed by freelex will
- * be ready and rarin to go even if it is interrupted.
- */
- do {
- struct wordent *new;
-
- new = (struct wordent *) xmalloc((size_t) sizeof(*wdp));
- new->word = 0;
- new->prev = wdp;
- new->next = hp;
- wdp->next = new;
- wdp = new;
- wdp->word = word();
- } while (wdp->word[0] != '\n');
- hp->prev = wdp;
- return (hadhist);
-}
-
-void
-prlex(fp, sp0)
- FILE *fp;
- struct wordent *sp0;
-{
- struct wordent *sp = sp0->next;
-
- for (;;) {
- (void) fprintf(fp, "%s", vis_str(sp->word));
- sp = sp->next;
- if (sp == sp0)
- break;
- if (sp->word[0] != '\n')
- (void) fputc(' ', fp);
- }
-}
-
-void
-copylex(hp, fp)
- struct wordent *hp;
- struct wordent *fp;
-{
- struct wordent *wdp;
-
- wdp = hp;
- fp = fp->next;
- do {
- struct wordent *new;
-
- new = (struct wordent *) xmalloc((size_t) sizeof(*wdp));
- new->prev = wdp;
- new->next = hp;
- wdp->next = new;
- wdp = new;
- wdp->word = Strsave(fp->word);
- fp = fp->next;
- } while (wdp->word[0] != '\n');
- hp->prev = wdp;
-}
-
-void
-freelex(vp)
- struct wordent *vp;
-{
- struct wordent *fp;
-
- while (vp->next != vp) {
- fp = vp->next;
- vp->next = fp->next;
- xfree((ptr_t) fp->word);
- xfree((ptr_t) fp);
- }
- vp->prev = vp;
-}
-
-static Char *
-word()
-{
- Char c, c1;
- Char *wp;
- Char wbuf[BUFSIZ];
- bool dolflg;
- int i;
-
- wp = wbuf;
- i = BUFSIZ - 4;
-loop:
- while ((c = getC(DOALL)) == ' ' || c == '\t')
- continue;
- if (cmap(c, _META | _ESC))
- switch (c) {
- case '&':
- case '|':
- case '<':
- case '>':
- *wp++ = c;
- c1 = getC(DOALL);
- if (c1 == c)
- *wp++ = c1;
- else
- ungetC(c1);
- goto ret;
-
- case '#':
- if (intty)
- break;
- c = 0;
- do {
- c1 = c;
- c = getC(0);
- } while (c != '\n');
- if (c1 == '\\')
- goto loop;
- /* fall into ... */
-
- case ';':
- case '(':
- case ')':
- case '\n':
- *wp++ = c;
- goto ret;
-
- case '\\':
- c = getC(0);
- if (c == '\n') {
- if (onelflg == 1)
- onelflg = 2;
- goto loop;
- }
- if (c != HIST)
- *wp++ = '\\', --i;
- c |= QUOTE;
- }
- c1 = 0;
- dolflg = DOALL;
- for (;;) {
- if (c1) {
- if (c == c1) {
- c1 = 0;
- dolflg = DOALL;
- }
- else if (c == '\\') {
- c = getC(0);
- if (c == HIST)
- c |= QUOTE;
- else {
- if (c == '\n')
- /*
- * if (c1 == '`') c = ' '; else
- */
- c |= QUOTE;
- ungetC(c);
- c = '\\';
- }
- }
- else if (c == '\n') {
- seterror(ERR_UNMATCHED, c1);
- ungetC(c);
- break;
- }
- }
- else if (cmap(c, _META | _QF | _QB | _ESC)) {
- if (c == '\\') {
- c = getC(0);
- if (c == '\n') {
- if (onelflg == 1)
- onelflg = 2;
- break;
- }
- if (c != HIST)
- *wp++ = '\\', --i;
- c |= QUOTE;
- }
- else if (cmap(c, _QF | _QB)) { /* '"` */
- c1 = c;
- dolflg = c == '"' ? DOALL : DOEXCL;
- }
- else if (c != '#' || !intty) {
- ungetC(c);
- break;
- }
- }
- if (--i > 0) {
- *wp++ = c;
- c = getC(dolflg);
- }
- else {
- seterror(ERR_WTOOLONG);
- wp = &wbuf[1];
- break;
- }
- }
-ret:
- *wp = 0;
- return (Strsave(wbuf));
-}
-
-static int
-getC1(flag)
- int flag;
-{
- Char c;
-
- while (1) {
- if ((c = peekc) != '\0') {
- peekc = 0;
- return (c);
- }
- if (lap) {
- if ((c = *lap++) == 0)
- lap = 0;
- else {
- if (cmap(c, _META | _QF | _QB))
- c |= QUOTE;
- return (c);
- }
- }
- if ((c = peekd) != '\0') {
- peekd = 0;
- return (c);
- }
- if (exclp) {
- if ((c = *exclp++) != '\0')
- return (c);
- if (exclnxt && --exclc >= 0) {
- exclnxt = exclnxt->next;
- setexclp(exclnxt->word);
- return (' ');
- }
- exclp = 0;
- exclnxt = 0;
- }
- if (exclnxt) {
- exclnxt = exclnxt->next;
- if (--exclc < 0)
- exclnxt = 0;
- else
- setexclp(exclnxt->word);
- continue;
- }
- c = readc(0);
- if (c == '$' && (flag & DODOL)) {
- getdol();
- continue;
- }
- if (c == HIST && (flag & DOEXCL)) {
- getexcl(0);
- continue;
- }
- break;
- }
- return (c);
-}
-
-static void
-getdol()
-{
- Char *np, *ep;
- Char name[4 * MAXVARLEN + 1];
- int c;
- int sc;
- bool special = 0, toolong;
-
- np = name, *np++ = '$';
- c = sc = getC(DOEXCL);
- if (any("\t \n", c)) {
- ungetD(c);
- ungetC('$' | QUOTE);
- return;
- }
- if (c == '{')
- *np++ = c, c = getC(DOEXCL);
- if (c == '#' || c == '?')
- special++, *np++ = c, c = getC(DOEXCL);
- *np++ = c;
- switch (c) {
-
- case '<':
- case '$':
- case '!':
- if (special)
- seterror(ERR_SPDOLLT);
- *np = 0;
- addla(name);
- return;
-
- case '\n':
- ungetD(c);
- np--;
- seterror(ERR_NEWLINE);
- *np = 0;
- addla(name);
- return;
-
- case '*':
- if (special)
- seterror(ERR_SPSTAR);
- *np = 0;
- addla(name);
- return;
-
- default:
- toolong = 0;
- if (Isdigit(c)) {
-#ifdef notdef
- /* let $?0 pass for now */
- if (special) {
- seterror(ERR_DIGIT);
- *np = 0;
- addla(name);
- return;
- }
-#endif
- /* we know that np < &name[4] */
- ep = &np[MAXVARLEN];
- while ((c = getC(DOEXCL)) != '\0'){
- if (!Isdigit(c))
- break;
- if (np < ep)
- *np++ = c;
- else
- toolong = 1;
- }
- }
- else if (letter(c)) {
- /* we know that np < &name[4] */
- ep = &np[MAXVARLEN];
- toolong = 0;
- while ((c = getC(DOEXCL)) != '\0') {
- /* Bugfix for ${v123x} from Chris Torek, DAS DEC-90. */
- if (!letter(c) && !Isdigit(c))
- break;
- if (np < ep)
- *np++ = c;
- else
- toolong = 1;
- }
- }
- else {
- *np = 0;
- seterror(ERR_VARILL);
- addla(name);
- return;
- }
- if (toolong) {
- seterror(ERR_VARTOOLONG);
- *np = 0;
- addla(name);
- return;
- }
- break;
- }
- if (c == '[') {
- *np++ = c;
- /*
- * Name up to here is a max of MAXVARLEN + 8.
- */
- ep = &np[2 * MAXVARLEN + 8];
- do {
- /*
- * Michael Greim: Allow $ expansion to take place in selector
- * expressions. (limits the number of characters returned)
- */
- c = getC(DOEXCL | DODOL);
- if (c == '\n') {
- ungetD(c);
- np--;
- seterror(ERR_NLINDEX);
- *np = 0;
- addla(name);
- return;
- }
- if (np < ep)
- *np++ = c;
- } while (c != ']');
- *np = '\0';
- if (np >= ep) {
- seterror(ERR_SELOVFL);
- addla(name);
- return;
- }
- c = getC(DOEXCL);
- }
- /*
- * Name up to here is a max of 2 * MAXVARLEN + 8.
- */
- if (c == ':') {
- /*
- * if the :g modifier is followed by a newline, then error right away!
- * -strike
- */
-
- int gmodflag = 0, amodflag = 0;
-
- do {
- *np++ = c, c = getC(DOEXCL);
- if (c == 'g' || c == 'a') {
- if (c == 'g')
- gmodflag++;
- else
- amodflag++;
- *np++ = c; c = getC(DOEXCL);
- }
- if ((c == 'g' && !gmodflag) || (c == 'a' && !amodflag)) {
- if (c == 'g')
- gmodflag++;
- else
- amodflag++;
- *np++ = c; c = getC(DOEXCL);
- }
- *np++ = c;
- /* scan s// [eichin:19910926.0512EST] */
- if (c == 's') {
- int delimcnt = 2;
- int delim = getC(0);
- *np++ = delim;
-
- if (!delim || letter(delim)
- || Isdigit(delim) || any(" \t\n", delim)) {
- seterror(ERR_BADSUBST);
- break;
- }
- while ((c = getC(0)) != (-1)) {
- *np++ = c;
- if(c == delim) delimcnt--;
- if(!delimcnt) break;
- }
- if(delimcnt) {
- seterror(ERR_BADSUBST);
- break;
- }
- c = 's';
- }
- if (!any("htrqxes", c)) {
- if ((amodflag || gmodflag) && c == '\n')
- stderror(ERR_VARSYN); /* strike */
- seterror(ERR_VARMOD, c);
- *np = 0;
- addla(name);
- return;
- }
- }
- while ((c = getC(DOEXCL)) == ':');
- ungetD(c);
- }
- else
- ungetD(c);
- if (sc == '{') {
- c = getC(DOEXCL);
- if (c != '}') {
- ungetD(c);
- seterror(ERR_MISSING, '}');
- *np = 0;
- addla(name);
- return;
- }
- *np++ = c;
- }
- *np = 0;
- addla(name);
- return;
-}
-
-void
-addla(cp)
- Char *cp;
-{
- Char buf[BUFSIZ];
-
- if (Strlen(cp) + (lap ? Strlen(lap) : 0) >=
- (sizeof(labuf) - 4) / sizeof(Char)) {
- seterror(ERR_EXPOVFL);
- return;
- }
- if (lap)
- (void) Strcpy(buf, lap);
- (void) Strcpy(labuf, cp);
- if (lap)
- (void) Strcat(labuf, buf);
- lap = labuf;
-}
-
-static Char lhsb[32];
-static Char slhs[32];
-static Char rhsb[64];
-static int quesarg;
-
-static void
-getexcl(sc)
- int sc;
-{
- struct wordent *hp, *ip;
- int left, right, dol;
- int c;
-
- if (sc == 0) {
- sc = getC(0);
- if (sc != '{') {
- ungetC(sc);
- sc = 0;
- }
- }
- quesarg = -1;
- lastev = eventno;
- hp = gethent(sc);
- if (hp == 0)
- return;
- hadhist = 1;
- dol = 0;
- if (hp == alhistp)
- for (ip = hp->next->next; ip != alhistt; ip = ip->next)
- dol++;
- else
- for (ip = hp->next->next; ip != hp->prev; ip = ip->next)
- dol++;
- left = 0, right = dol;
- if (sc == HISTSUB) {
- ungetC('s'), unreadc(HISTSUB), c = ':';
- goto subst;
- }
- c = getC(0);
- if (!any(":^$*-%", c))
- goto subst;
- left = right = -1;
- if (c == ':') {
- c = getC(0);
- unreadc(c);
- if (letter(c) || c == '&') {
- c = ':';
- left = 0, right = dol;
- goto subst;
- }
- }
- else
- ungetC(c);
- if (!getsel(&left, &right, dol))
- return;
- c = getC(0);
- if (c == '*')
- ungetC(c), c = '-';
- if (c == '-') {
- if (!getsel(&left, &right, dol))
- return;
- c = getC(0);
- }
-subst:
- exclc = right - left + 1;
- while (--left >= 0)
- hp = hp->next;
- if (sc == HISTSUB || c == ':') {
- do {
- hp = getsub(hp);
- c = getC(0);
- } while (c == ':');
- }
- unreadc(c);
- if (sc == '{') {
- c = getC(0);
- if (c != '}')
- seterror(ERR_BADBANG);
- }
- exclnxt = hp;
-}
-
-static struct wordent *
-getsub(en)
- struct wordent *en;
-{
- Char *cp;
- int delim;
- int c;
- int sc;
- bool global;
- Char orhsb[sizeof(rhsb) / sizeof(Char)];
-
- do {
- exclnxt = 0;
- global = 0;
- sc = c = getC(0);
- if (c == 'g' || c == 'a') {
- global |= (c == 'g') ? 1 : 2;
- sc = c = getC(0);
- }
- if (((c =='g') && !(global & 1)) || ((c == 'a') && !(global & 2))) {
- global |= (c == 'g') ? 1 : 2;
- sc = c = getC(0);
- }
-
- switch (c) {
- case 'p':
- justpr++;
- return (en);
-
- case 'x':
- case 'q':
- global |= 1;
-
- /* fall into ... */
-
- case 'h':
- case 'r':
- case 't':
- case 'e':
- break;
-
- case '&':
- if (slhs[0] == 0) {
- seterror(ERR_NOSUBST);
- return (en);
- }
- (void) Strcpy(lhsb, slhs);
- break;
-
-#ifdef notdef
- case '~':
- if (lhsb[0] == 0)
- goto badlhs;
- break;
-#endif
-
- case 's':
- delim = getC(0);
- if (letter(delim) || Isdigit(delim) || any(" \t\n", delim)) {
- unreadc(delim);
- lhsb[0] = 0;
- seterror(ERR_BADSUBST);
- return (en);
- }
- cp = lhsb;
- for (;;) {
- c = getC(0);
- if (c == '\n') {
- unreadc(c);
- break;
- }
- if (c == delim)
- break;
- if (cp > &lhsb[sizeof(lhsb) / sizeof(Char) - 2]) {
- lhsb[0] = 0;
- seterror(ERR_BADSUBST);
- return (en);
- }
- if (c == '\\') {
- c = getC(0);
- if (c != delim && c != '\\')
- *cp++ = '\\';
- }
- *cp++ = c;
- }
- if (cp != lhsb)
- *cp++ = 0;
- else if (lhsb[0] == 0) {
- seterror(ERR_LHS);
- return (en);
- }
- cp = rhsb;
- (void) Strcpy(orhsb, cp);
- for (;;) {
- c = getC(0);
- if (c == '\n') {
- unreadc(c);
- break;
- }
- if (c == delim)
- break;
-#ifdef notdef
- if (c == '~') {
- if (&cp[Strlen(orhsb)] > &rhsb[sizeof(rhsb) /
- sizeof(Char) - 2])
- goto toorhs;
- (void) Strcpy(cp, orhsb);
- cp = Strend(cp);
- continue;
- }
-#endif
- if (cp > &rhsb[sizeof(rhsb) / sizeof(Char) - 2]) {
- seterror(ERR_RHSLONG);
- return (en);
- }
- if (c == '\\') {
- c = getC(0);
- if (c != delim /* && c != '~' */ )
- *cp++ = '\\';
- }
- *cp++ = c;
- }
- *cp++ = 0;
- break;
-
- default:
- if (c == '\n')
- unreadc(c);
- seterror(ERR_BADBANGMOD, c);
- return (en);
- }
- (void) Strcpy(slhs, lhsb);
- if (exclc)
- en = dosub(sc, en, global);
- }
- while ((c = getC(0)) == ':');
- unreadc(c);
- return (en);
-}
-
-static struct wordent *
-dosub(sc, en, global)
- int sc;
- struct wordent *en;
- bool global;
-{
- struct wordent lexi;
- bool didsub = 0, didone = 0;
- struct wordent *hp = &lexi;
- struct wordent *wdp;
- int i = exclc;
-
- wdp = hp;
- while (--i >= 0) {
- struct wordent *new =
- (struct wordent *) xcalloc(1, sizeof *wdp);
-
- new->word = 0;
- new->prev = wdp;
- new->next = hp;
- wdp->next = new;
- wdp = new;
- en = en->next;
- if (en->word) {
- Char *tword, *otword;
-
- if ((global & 1) || didsub == 0) {
- tword = subword(en->word, sc, &didone);
- if (didone)
- didsub = 1;
- if (global & 2) {
- while (didone && tword != STRNULL) {
- otword = tword;
- tword = subword(otword, sc, &didone);
- if (Strcmp(tword, otword) == 0) {
- xfree((ptr_t) otword);
- break;
- }
- else
- xfree((ptr_t) otword);
- }
- }
- }
- else
- tword = Strsave(en->word);
- wdp->word = tword;
- }
- }
- if (didsub == 0)
- seterror(ERR_MODFAIL);
- hp->prev = wdp;
- return (&enthist(-1000, &lexi, 0)->Hlex);
-}
-
-static Char *
-subword(cp, type, adid)
- Char *cp;
- int type;
- bool *adid;
-{
- Char wbuf[BUFSIZ];
- Char *wp, *mp, *np;
- int i;
-
- *adid = 0;
- switch (type) {
-
- case 'r':
- case 'e':
- case 'h':
- case 't':
- case 'q':
- case 'x':
- wp = domod(cp, type);
- if (wp == 0)
- return (Strsave(cp));
- *adid = 1;
- return (wp);
-
- default:
- wp = wbuf;
- i = BUFSIZ - 4;
- for (mp = cp; *mp; mp++)
- if (matchs(mp, lhsb)) {
- for (np = cp; np < mp;)
- *wp++ = *np++, --i;
- for (np = rhsb; *np; np++)
- switch (*np) {
-
- case '\\':
- if (np[1] == '&')
- np++;
- /* fall into ... */
-
- default:
- if (--i < 0) {
- seterror(ERR_SUBOVFL);
- return (STRNULL);
- }
- *wp++ = *np;
- continue;
-
- case '&':
- i -= Strlen(lhsb);
- if (i < 0) {
- seterror(ERR_SUBOVFL);
- return (STRNULL);
- }
- *wp = 0;
- (void) Strcat(wp, lhsb);
- wp = Strend(wp);
- continue;
- }
- mp += Strlen(lhsb);
- i -= Strlen(mp);
- if (i < 0) {
- seterror(ERR_SUBOVFL);
- return (STRNULL);
- }
- *wp = 0;
- (void) Strcat(wp, mp);
- *adid = 1;
- return (Strsave(wbuf));
- }
- return (Strsave(cp));
- }
-}
-
-Char *
-domod(cp, type)
- Char *cp;
- int type;
-{
- Char *wp, *xp;
- int c;
-
- switch (type) {
-
- case 'x':
- case 'q':
- wp = Strsave(cp);
- for (xp = wp; (c = *xp) != '\0'; xp++)
- if ((c != ' ' && c != '\t') || type == 'q')
- *xp |= QUOTE;
- return (wp);
-
- case 'h':
- case 't':
- if (!any(short2str(cp), '/'))
- return (type == 't' ? Strsave(cp) : 0);
- wp = Strend(cp);
- while (*--wp != '/')
- continue;
- if (type == 'h')
- xp = Strsave(cp), xp[wp - cp] = 0;
- else
- xp = Strsave(wp + 1);
- return (xp);
-
- case 'e':
- case 'r':
- wp = Strend(cp);
- for (wp--; wp >= cp && *wp != '/'; wp--)
- if (*wp == '.') {
- if (type == 'e')
- xp = Strsave(wp + 1);
- else
- xp = Strsave(cp), xp[wp - cp] = 0;
- return (xp);
- }
- return (Strsave(type == 'e' ? STRNULL : cp));
- default:
- break;
- }
- return (0);
-}
-
-static int
-matchs(str, pat)
- Char *str, *pat;
-{
- while (*str && *pat && *str == *pat)
- str++, pat++;
- return (*pat == 0);
-}
-
-static int
-getsel(al, ar, dol)
- int *al, *ar;
- int dol;
-{
- int c = getC(0);
- int i;
- bool first = *al < 0;
-
- switch (c) {
-
- case '%':
- if (quesarg == -1) {
- seterror(ERR_BADBANGARG);
- return (0);
- }
- if (*al < 0)
- *al = quesarg;
- *ar = quesarg;
- break;
-
- case '-':
- if (*al < 0) {
- *al = 0;
- *ar = dol - 1;
- unreadc(c);
- }
- return (1);
-
- case '^':
- if (*al < 0)
- *al = 1;
- *ar = 1;
- break;
-
- case '$':
- if (*al < 0)
- *al = dol;
- *ar = dol;
- break;
-
- case '*':
- if (*al < 0)
- *al = 1;
- *ar = dol;
- if (*ar < *al) {
- *ar = 0;
- *al = 1;
- return (1);
- }
- break;
-
- default:
- if (Isdigit(c)) {
- i = 0;
- while (Isdigit(c)) {
- i = i * 10 + c - '0';
- c = getC(0);
- }
- if (i < 0)
- i = dol + 1;
- if (*al < 0)
- *al = i;
- *ar = i;
- }
- else if (*al < 0)
- *al = 0, *ar = dol;
- else
- *ar = dol - 1;
- unreadc(c);
- break;
- }
- if (first) {
- c = getC(0);
- unreadc(c);
- if (any("-$*", c))
- return (1);
- }
- if (*al > *ar || *ar > dol) {
- seterror(ERR_BADBANGARG);
- return (0);
- }
- return (1);
-
-}
-
-static struct wordent *
-gethent(sc)
- int sc;
-{
- struct Hist *hp;
- Char *np;
- int c;
- int event;
- bool back = 0;
-
- c = sc == HISTSUB ? HIST : getC(0);
- if (c == HIST) {
- if (alhistp)
- return (alhistp);
- event = eventno;
- }
- else
- switch (c) {
-
- case ':':
- case '^':
- case '$':
- case '*':
- case '%':
- ungetC(c);
- if (lastev == eventno && alhistp)
- return (alhistp);
- event = lastev;
- break;
-
- case '#': /* !# is command being typed in (mrh) */
- if (--hleft == 0) {
- seterror(ERR_HISTLOOP);
- return (0);
- }
- else
- return (&paraml);
- /* NOTREACHED */
-
- case '-':
- back = 1;
- c = getC(0);
- /* FALLTHROUGH */
-
- default:
- if (any("(=~", c)) {
- unreadc(c);
- ungetC(HIST);
- return (0);
- }
- np = lhsb;
- event = 0;
- while (!cmap(c, _ESC | _META | _QF | _QB) && !any("^$*-%{}:", c)) {
- if (event != -1 && Isdigit(c))
- event = event * 10 + c - '0';
- else
- event = -1;
- if (np < &lhsb[sizeof(lhsb) / sizeof(Char) - 2])
- *np++ = c;
- c = getC(0);
- }
- unreadc(c);
- if (np == lhsb) {
- ungetC(HIST);
- return (0);
- }
- *np++ = 0;
- if (event != -1) {
- /*
- * History had only digits
- */
- if (back)
- event = eventno + (alhistp == 0) - (event ? event : 0);
- break;
- }
- hp = findev(lhsb, 0);
- if (hp)
- lastev = hp->Hnum;
- return (&hp->Hlex);
-
- case '?':
- np = lhsb;
- for (;;) {
- c = getC(0);
- if (c == '\n') {
- unreadc(c);
- break;
- }
- if (c == '?')
- break;
- if (np < &lhsb[sizeof(lhsb) / sizeof(Char) - 2])
- *np++ = c;
- }
- if (np == lhsb) {
- if (lhsb[0] == 0) {
- seterror(ERR_NOSEARCH);
- return (0);
- }
- }
- else
- *np++ = 0;
- hp = findev(lhsb, 1);
- if (hp)
- lastev = hp->Hnum;
- return (&hp->Hlex);
- }
-
- for (hp = Histlist.Hnext; hp; hp = hp->Hnext)
- if (hp->Hnum == event) {
- hp->Href = eventno;
- lastev = hp->Hnum;
- return (&hp->Hlex);
- }
- np = putn(event);
- seterror(ERR_NOEVENT, vis_str(np));
- return (0);
-}
-
-static struct Hist *
-findev(cp, anyarg)
- Char *cp;
- bool anyarg;
-{
- struct Hist *hp;
-
- for (hp = Histlist.Hnext; hp; hp = hp->Hnext) {
- Char *dp;
- Char *p, *q;
- struct wordent *lp = hp->Hlex.next;
- int argno = 0;
-
- /*
- * The entries added by alias substitution don't have a newline but do
- * have a negative event number. Savehist() trims off these entries,
- * but it happens before alias expansion, too early to delete those
- * from the previous command.
- */
- if (hp->Hnum < 0)
- continue;
- if (lp->word[0] == '\n')
- continue;
- if (!anyarg) {
- p = cp;
- q = lp->word;
- do
- if (!*p)
- return (hp);
- while (*p++ == *q++);
- continue;
- }
- do {
- for (dp = lp->word; *dp; dp++) {
- p = cp;
- q = dp;
- do
- if (!*p) {
- quesarg = argno;
- return (hp);
- }
- while (*p++ == *q++);
- }
- lp = lp->next;
- argno++;
- } while (lp->word[0] != '\n');
- }
- seterror(ERR_NOEVENT, vis_str(cp));
- return (0);
-}
-
-
-static void
-setexclp(cp)
- Char *cp;
-{
- if (cp && cp[0] == '\n')
- return;
- exclp = cp;
-}
-
-void
-unreadc(c)
- int c;
-{
- peekread = c;
-}
-
-int
-readc(wanteof)
- bool wanteof;
-{
- int c;
- static int sincereal;
-
- aret = F_SEEK;
- if ((c = peekread) != '\0') {
- peekread = 0;
- return (c);
- }
-top:
- aret = F_SEEK;
- if (alvecp) {
- aret = A_SEEK;
- if ((c = *alvecp++) != '\0')
- return (c);
- if (alvec && *alvec) {
- alvecp = *alvec++;
- return (' ');
- }
- else {
- aret = F_SEEK;
- alvecp = NULL;
- return('\n');
- }
- }
- if (alvec) {
- if ((alvecp = *alvec) != '\0') {
- alvec++;
- goto top;
- }
- /* Infinite source! */
- return ('\n');
- }
- if (evalp) {
- aret = E_SEEK;
- if ((c = *evalp++) != '\0')
- return (c);
- if (evalvec && *evalvec) {
- evalp = *evalvec++;
- return (' ');
- }
- aret = F_SEEK;
- evalp = 0;
- }
- if (evalvec) {
- if (evalvec == (Char **) 1) {
- doneinp = 1;
- reset();
- }
- if ((evalp = *evalvec) != '\0') {
- evalvec++;
- goto top;
- }
- evalvec = (Char **) 1;
- return ('\n');
- }
- do {
- if (arginp == (Char *) 1 || onelflg == 1) {
- if (wanteof)
- return (-1);
- exitstat();
- }
- if (arginp) {
- if ((c = *arginp++) == 0) {
- arginp = (Char *) 1;
- return ('\n');
- }
- return (c);
- }
-reread:
- c = bgetc();
- if (c < 0) {
- struct termios tty;
- if (wanteof)
- return (-1);
- /* was isatty but raw with ignoreeof yields problems */
- if (tcgetattr(SHIN, &tty) == 0 && (tty.c_lflag & ICANON))
- {
- /* was 'short' for FILEC */
- int ctpgrp;
-
- if (++sincereal > 25)
- goto oops;
- if (tpgrp != -1 &&
- (ctpgrp = tcgetpgrp(FSHTTY)) != -1 &&
- tpgrp != ctpgrp) {
- (void) tcsetpgrp(FSHTTY, tpgrp);
- (void) killpg((pid_t) ctpgrp, SIGHUP);
- (void) fprintf(csherr, "Reset tty pgrp from %d to %d\n",
- ctpgrp, tpgrp);
- goto reread;
- }
- if (adrof(STRignoreeof)) {
- if (loginsh)
- (void) fprintf(csherr,"\nUse \"logout\" to logout.\n");
- else
- (void) fprintf(csherr,"\nUse \"exit\" to leave csh.\n");
- reset();
- }
- if (chkstop == 0)
- panystop(1);
- }
- oops:
- doneinp = 1;
- reset();
- }
- sincereal = 0;
- if (c == '\n' && onelflg)
- onelflg--;
- } while (c == 0);
- return (c);
-}
-
-static int
-bgetc()
-{
- int buf, off, c;
-
-#ifdef FILEC
- int numleft = 0, roomleft;
- Char ttyline[BUFSIZ];
-#endif
- char tbuf[BUFSIZ + 1];
-
- if (cantell) {
- if (fseekp < fbobp || fseekp > feobp) {
- fbobp = feobp = fseekp;
- (void) lseek(SHIN, fseekp, L_SET);
- }
- if (fseekp == feobp) {
- int i;
-
- fbobp = feobp;
- do
- c = read(SHIN, tbuf, BUFSIZ);
- while (c < 0 && errno == EINTR);
- if (c <= 0)
- return (-1);
- for (i = 0; i < c; i++)
- fbuf[0][i] = (unsigned char) tbuf[i];
- feobp += c;
- }
- c = fbuf[0][fseekp - fbobp];
- fseekp++;
- return (c);
- }
-
-again:
- buf = (int) fseekp / BUFSIZ;
- if (buf >= fblocks) {
- Char **nfbuf =
- (Char **) xcalloc((size_t) (fblocks + 2),
- sizeof(Char **));
-
- if (fbuf) {
- (void) blkcpy(nfbuf, fbuf);
- xfree((ptr_t) fbuf);
- }
- fbuf = nfbuf;
- fbuf[fblocks] = (Char *) xcalloc(BUFSIZ, sizeof(Char));
- fblocks++;
- if (!intty)
- goto again;
- }
- if (fseekp >= feobp) {
- buf = (int) feobp / BUFSIZ;
- off = (int) feobp % BUFSIZ;
- roomleft = BUFSIZ - off;
-
-#ifdef FILEC
- roomleft = BUFSIZ - off;
- for (;;) {
- if (filec && intty) {
- c = numleft ? numleft : tenex(ttyline, BUFSIZ);
- if (c > roomleft) {
- /* start with fresh buffer */
- feobp = fseekp = fblocks * BUFSIZ;
- numleft = c;
- goto again;
- }
- if (c > 0)
- memmove(fbuf[buf] + off, ttyline, c * sizeof(Char));
- numleft = 0;
- }
- else {
-#endif
- c = read(SHIN, tbuf, roomleft);
- if (c > 0) {
- int i;
- Char *ptr = fbuf[buf] + off;
-
- for (i = 0; i < c; i++)
- ptr[i] = (unsigned char) tbuf[i];
- }
-#ifdef FILEC
- }
-#endif
- if (c >= 0)
- break;
- if (errno == EWOULDBLOCK) {
- int off = 0;
-
- (void) ioctl(SHIN, FIONBIO, (ioctl_t) & off);
- }
- else if (errno != EINTR)
- break;
- }
- if (c <= 0)
- return (-1);
- feobp += c;
-#ifndef FILEC
- goto again;
-#else
- if (filec && !intty)
- goto again;
-#endif
- }
- c = fbuf[buf][(int) fseekp % BUFSIZ];
- fseekp++;
- return (c);
-}
-
-static void
-bfree()
-{
- int sb, i;
-
- if (cantell)
- return;
- if (whyles)
- return;
- sb = (int) (fseekp - 1) / BUFSIZ;
- if (sb > 0) {
- for (i = 0; i < sb; i++)
- xfree((ptr_t) fbuf[i]);
- (void) blkcpy(fbuf, &fbuf[sb]);
- fseekp -= BUFSIZ * sb;
- feobp -= BUFSIZ * sb;
- fblocks -= sb;
- }
-}
-
-void
-bseek(l)
- struct Ain *l;
-{
- switch (aret = l->type) {
- case E_SEEK:
- evalvec = l->a_seek;
- evalp = l->c_seek;
- return;
- case A_SEEK:
- alvec = l->a_seek;
- alvecp = l->c_seek;
- return;
- case F_SEEK:
- fseekp = l->f_seek;
- return;
- default:
- (void) fprintf(csherr, "Bad seek type %d\n", aret);
- abort();
- }
-}
-
-void
-btell(l)
- struct Ain *l;
-{
- switch (l->type = aret) {
- case E_SEEK:
- l->a_seek = evalvec;
- l->c_seek = evalp;
- return;
- case A_SEEK:
- l->a_seek = alvec;
- l->c_seek = alvecp;
- return;
- case F_SEEK:
- l->f_seek = fseekp;
- l->a_seek = NULL;
- return;
- default:
- (void) fprintf(csherr, "Bad seek type %d\n", aret);
- abort();
- }
-}
-
-void
-btoeof()
-{
- (void) lseek(SHIN, (off_t) 0, L_XTND);
- aret = F_SEEK;
- fseekp = feobp;
- alvec = NULL;
- alvecp = NULL;
- evalvec = NULL;
- evalp = NULL;
- wfree();
- bfree();
-}
-
-void
-settell()
-{
- cantell = 0;
- if (arginp || onelflg || intty)
- return;
- if (lseek(SHIN, (off_t) 0, L_INCR) < 0 || errno == ESPIPE)
- return;
- fbuf = (Char **) xcalloc(2, sizeof(Char **));
- fblocks = 1;
- fbuf[0] = (Char *) xcalloc(BUFSIZ, sizeof(Char));
- fseekp = fbobp = feobp = lseek(SHIN, (off_t) 0, L_INCR);
- cantell = 1;
-}
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