1632 lines
30 KiB
C
1632 lines
30 KiB
C
/* $NetBSD: lex.c,v 1.31 2013/08/06 05:42:43 christos Exp $ */
|
|
|
|
/*-
|
|
* 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. 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 <sys/cdefs.h>
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)lex.c 8.1 (Berkeley) 5/31/93";
|
|
#else
|
|
__RCSID("$NetBSD: lex.c,v 1.31 2013/08/06 05:42:43 christos Exp $");
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
#include <sys/ioctl.h>
|
|
#include <sys/types.h>
|
|
|
|
#include <errno.h>
|
|
#include <stdarg.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <termios.h>
|
|
#include <unistd.h>
|
|
|
|
#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(void);
|
|
static int getC1(int);
|
|
static void getdol(void);
|
|
static void getexcl(int);
|
|
static struct Hist *findev(Char *, int);
|
|
static void setexclp(Char *);
|
|
static int bgetc(void);
|
|
static void bfree(void);
|
|
static struct wordent *gethent(int);
|
|
static int matchs(Char *, Char *);
|
|
static int getsel(int *, int *, int);
|
|
static struct wordent *getsub(struct wordent *);
|
|
static Char *subword(Char *, int, int *);
|
|
static struct wordent *dosub(int, struct wordent *, int);
|
|
|
|
/*
|
|
* 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 int peekc = 0, peekd = 0;
|
|
static int 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 **alvec, *alvecp;
|
|
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[BUFSIZE];
|
|
|
|
/*
|
|
* 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 int hadhist = 0;
|
|
|
|
/*
|
|
* Avoid alias expansion recursion via \!#
|
|
*/
|
|
int hleft;
|
|
|
|
static int getCtmp;
|
|
|
|
#define getC(f) ((getCtmp = peekc) ? (peekc = 0, getCtmp) : getC1(f))
|
|
#define ungetC(c) peekc = c
|
|
#define ungetD(c) peekd = c
|
|
|
|
int
|
|
lex(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 = xmalloc(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(FILE *fp, struct wordent *sp0)
|
|
{
|
|
struct wordent *sp;
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
#ifdef EDIT
|
|
int
|
|
sprlex(char **s, struct wordent *sp0)
|
|
{
|
|
struct wordent *sp;
|
|
|
|
sp = sp0->next;
|
|
char *os = *s;
|
|
for (;;) {
|
|
char *w = vis_str(sp->word);
|
|
if (os == NULL) {
|
|
if (asprintf(s, "%s", w) < 0)
|
|
return -1;
|
|
os = *s;
|
|
} else if (*os != '\n') {
|
|
if (asprintf(s, "%s %s", os, w) < 0) {
|
|
free(os);
|
|
return 1;
|
|
}
|
|
free(os);
|
|
os = *s;
|
|
}
|
|
sp = sp->next;
|
|
if (sp == sp0)
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
void
|
|
copylex(struct wordent *hp, struct wordent *fp)
|
|
{
|
|
struct wordent *wdp;
|
|
|
|
wdp = hp;
|
|
fp = fp->next;
|
|
do {
|
|
struct wordent *new;
|
|
|
|
new = xmalloc(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(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(void)
|
|
{
|
|
Char wbuf[BUFSIZE], *wp;
|
|
int i, c, c1;
|
|
int dolflg;
|
|
|
|
wp = wbuf;
|
|
i = BUFSIZE - 4;
|
|
loop:
|
|
while ((c = getC(DOALL)) == ' ' || c == '\t')
|
|
continue;
|
|
if (cmap(c, _META | _ESC))
|
|
switch (c) {
|
|
case '&':
|
|
case '|':
|
|
case '<':
|
|
case '>':
|
|
*wp++ = (Char)c;
|
|
c1 = getC(DOALL);
|
|
if (c1 == c)
|
|
*wp++ = (Char)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;
|
|
/* FALLTHROUGH */
|
|
|
|
case ';':
|
|
case '(':
|
|
case ')':
|
|
case '\n':
|
|
*wp++ = (Char)c;
|
|
goto ret;
|
|
|
|
case '\\':
|
|
c = getC(0);
|
|
if (c == '\n') {
|
|
if (onelflg == 1)
|
|
onelflg = 2;
|
|
goto loop;
|
|
}
|
|
if (c != HIST)
|
|
*wp++ = '\\', --i;
|
|
c |= QUOTE;
|
|
break;
|
|
}
|
|
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++ = (Char)c;
|
|
c = getC(dolflg);
|
|
}
|
|
else {
|
|
seterror(ERR_WTOOLONG);
|
|
wp = &wbuf[1];
|
|
break;
|
|
}
|
|
}
|
|
ret:
|
|
*wp = 0;
|
|
return (Strsave(wbuf));
|
|
}
|
|
|
|
static int
|
|
getC1(int flag)
|
|
{
|
|
int c;
|
|
|
|
for (;;) {
|
|
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 == '$' && (flag & DODOL)) {
|
|
getdol();
|
|
continue;
|
|
}
|
|
if (c == HIST && (flag & DOEXCL)) {
|
|
getexcl(0);
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
return (c);
|
|
}
|
|
|
|
static void
|
|
getdol(void)
|
|
{
|
|
Char name[4*MAXVARLEN+1], *ep, *np;
|
|
int c, sc;
|
|
int special, toolong;
|
|
|
|
special = 0;
|
|
np = name, *np++ = '$';
|
|
c = sc = getC(DOEXCL);
|
|
if (any("\t \n", c)) {
|
|
ungetD(c);
|
|
ungetC('$' | QUOTE);
|
|
return;
|
|
}
|
|
if (c == '{')
|
|
*np++ = (Char)c, c = getC(DOEXCL);
|
|
if (c == '#' || c == '?')
|
|
special++, *np++ = (Char)c, c = getC(DOEXCL);
|
|
*np++ = (Char)c;
|
|
switch (c) {
|
|
case '<':
|
|
case '$':
|
|
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++ = (Char)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++ = (Char)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++ = (Char)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++ = (Char)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 amodflag, gmodflag;
|
|
|
|
amodflag = 0;
|
|
gmodflag = 0;
|
|
do {
|
|
*np++ = (Char)c, c = getC(DOEXCL);
|
|
if (c == 'g' || c == 'a') {
|
|
if (c == 'g')
|
|
gmodflag++;
|
|
else
|
|
amodflag++;
|
|
*np++ = (Char)c; c = getC(DOEXCL);
|
|
}
|
|
if ((c == 'g' && !gmodflag) || (c == 'a' && !amodflag)) {
|
|
if (c == 'g')
|
|
gmodflag++;
|
|
else
|
|
amodflag++;
|
|
*np++ = (Char)c, c = getC(DOEXCL);
|
|
}
|
|
*np++ = (Char)c;
|
|
/* scan s// [eichin:19910926.0512EST] */
|
|
if (c == 's') {
|
|
int delimcnt = 2;
|
|
int delim = getC(0);
|
|
*np++ = (Char)delim;
|
|
|
|
if (!delim || letter(delim)
|
|
|| Isdigit(delim) || any(" \t\n", delim)) {
|
|
seterror(ERR_BADSUBST);
|
|
break;
|
|
}
|
|
while ((c = getC(0)) != -1) {
|
|
*np++ = (Char)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++ = (Char)c;
|
|
}
|
|
*np = 0;
|
|
addla(name);
|
|
return;
|
|
}
|
|
|
|
void
|
|
addla(Char *cp)
|
|
{
|
|
Char buf[BUFSIZE];
|
|
|
|
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(int sc)
|
|
{
|
|
struct wordent *hp, *ip;
|
|
int c, dol, left, right;
|
|
|
|
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(struct wordent *en)
|
|
{
|
|
Char orhsb[sizeof(rhsb) / sizeof(Char)];
|
|
Char *cp;
|
|
int c, delim, sc;
|
|
int global;
|
|
|
|
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;
|
|
/* FALLTHROUGH */
|
|
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++ = (Char)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++ = (Char)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(int sc, struct wordent *en, int global)
|
|
{
|
|
struct wordent lexi, *hp, *wdp;
|
|
int i;
|
|
int didone, didsub;
|
|
|
|
didone = 0;
|
|
didsub = 0;
|
|
i = exclc;
|
|
hp = &lexi;
|
|
|
|
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(Char *cp, int type, int *adid)
|
|
{
|
|
Char wbuf[BUFSIZE];
|
|
Char *mp, *np, *wp;
|
|
ssize_t 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 = BUFSIZE - 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++;
|
|
/* FALLTHROUGH */
|
|
default:
|
|
if (--i < 0) {
|
|
seterror(ERR_SUBOVFL);
|
|
return (STRNULL);
|
|
}
|
|
*wp++ = *np;
|
|
continue;
|
|
case '&':
|
|
i -= (ssize_t)Strlen(lhsb);
|
|
if (i < 0) {
|
|
seterror(ERR_SUBOVFL);
|
|
return (STRNULL);
|
|
}
|
|
*wp = 0;
|
|
(void) Strcat(wp, lhsb);
|
|
wp = Strend(wp);
|
|
continue;
|
|
}
|
|
mp += Strlen(lhsb);
|
|
i -= (ssize_t)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(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(Char *str, Char *pat)
|
|
{
|
|
while (*str && *pat && *str == *pat)
|
|
str++, pat++;
|
|
return (*pat == 0);
|
|
}
|
|
|
|
static int
|
|
getsel(int *al, int *ar, int dol)
|
|
{
|
|
int c, i;
|
|
int first;
|
|
|
|
c = getC(0);
|
|
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("-$*", c))
|
|
return (1);
|
|
}
|
|
if (*al > *ar || *ar > dol) {
|
|
seterror(ERR_BADBANGARG);
|
|
return (0);
|
|
}
|
|
return (1);
|
|
|
|
}
|
|
|
|
static struct wordent *
|
|
gethent(int sc)
|
|
{
|
|
struct Hist *hp;
|
|
Char *np;
|
|
char *str;
|
|
int c, event;
|
|
int back;
|
|
|
|
back = 0;
|
|
c = sc == HISTSUB ? HIST : getC(0);
|
|
if (c == HIST) {
|
|
if (alhistp)
|
|
return (alhistp);
|
|
event = eventno;
|
|
}
|
|
else
|
|
switch (c) {
|
|
case ':':
|
|
case '^':
|
|
case '$':
|
|
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 (¶ml);
|
|
/* 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++ = (Char)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++ = (Char)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);
|
|
str = vis_str(np);
|
|
xfree((ptr_t) np);
|
|
seterror(ERR_NOEVENT, str);
|
|
return (0);
|
|
}
|
|
|
|
static struct Hist *
|
|
findev(Char *cp, int anyarg)
|
|
{
|
|
struct Hist *hp;
|
|
|
|
for (hp = Histlist.Hnext; hp; hp = hp->Hnext) {
|
|
Char *dp, *p, *q;
|
|
struct wordent *lp;
|
|
int argno;
|
|
|
|
lp = hp->Hlex.next;
|
|
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(Char *cp)
|
|
{
|
|
if (cp && cp[0] == '\n')
|
|
return;
|
|
exclp = cp;
|
|
}
|
|
|
|
void
|
|
unreadc(int c)
|
|
{
|
|
peekread = c;
|
|
}
|
|
|
|
int
|
|
readc(int wanteof)
|
|
{
|
|
static int sincereal;
|
|
int c;
|
|
|
|
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 */
|
|
pid_t ctpgrp;
|
|
|
|
if (++sincereal > 25)
|
|
goto oops;
|
|
if (tpgrp != -1 &&
|
|
(ctpgrp = tcgetpgrp(FSHTTY)) != -1 &&
|
|
tpgrp != ctpgrp) {
|
|
(void)tcsetpgrp(FSHTTY, tpgrp);
|
|
(void)kill(-ctpgrp, SIGHUP);
|
|
(void)fprintf(csherr, "Reset tty pgrp from %ld to %ld\n",
|
|
(long)ctpgrp, (long)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(void)
|
|
{
|
|
#ifdef FILEC
|
|
char tbuf[BUFSIZE + 1];
|
|
Char ttyline[BUFSIZE];
|
|
int buf, off;
|
|
ssize_t c, numleft, roomleft;
|
|
|
|
numleft = 0;
|
|
#else /* FILEC */
|
|
char tbuf[BUFSIZE + 1];
|
|
int c, buf, off;
|
|
#endif /* !FILEC */
|
|
|
|
if (cantell) {
|
|
if (fseekp < fbobp || fseekp > feobp) {
|
|
fbobp = feobp = fseekp;
|
|
(void)lseek(SHIN, fseekp, SEEK_SET);
|
|
}
|
|
if (fseekp == feobp) {
|
|
int i;
|
|
|
|
fbobp = feobp;
|
|
do
|
|
c = read(SHIN, tbuf, BUFSIZE);
|
|
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 (int)(c);
|
|
}
|
|
|
|
again:
|
|
buf = (int) fseekp / BUFSIZE;
|
|
if (buf >= fblocks) {
|
|
Char **nfbuf;
|
|
|
|
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(BUFSIZE, sizeof(Char));
|
|
fblocks++;
|
|
if (!intty)
|
|
goto again;
|
|
}
|
|
if (fseekp >= feobp) {
|
|
buf = (int) feobp / BUFSIZE;
|
|
off = (int) feobp % BUFSIZE;
|
|
roomleft = BUFSIZE - off;
|
|
|
|
#ifdef FILEC
|
|
for (;;) {
|
|
if ((editing || filec) && intty) {
|
|
#ifdef EDIT
|
|
if (editing) {
|
|
const char *p;
|
|
int d;
|
|
if ((p = el_gets(el, &d)) != NULL) {
|
|
size_t i;
|
|
/* XXX: Truncation */
|
|
numleft = d > BUFSIZE ? BUFSIZE : d;
|
|
for (i = 0; *p && i < BUFSIZE; i++, p++)
|
|
ttyline[i] = *p;
|
|
ttyline[i - (i == BUFSIZE)] = '\0';
|
|
}
|
|
}
|
|
#endif
|
|
c = numleft ? numleft : tenex(ttyline, BUFSIZE);
|
|
if (c > roomleft) {
|
|
/* start with fresh buffer */
|
|
feobp = fseekp = fblocks * BUFSIZE;
|
|
numleft = c;
|
|
goto again;
|
|
}
|
|
if (c > 0)
|
|
(void)memcpy(fbuf[buf] + off, ttyline,
|
|
(size_t)c * sizeof(**fbuf));
|
|
numleft = 0;
|
|
}
|
|
else {
|
|
#endif
|
|
c = read(SHIN, tbuf, (size_t)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 iooff = 0;
|
|
|
|
(void)ioctl(SHIN, FIONBIO, (ioctl_t) & iooff);
|
|
}
|
|
else if (errno != EINTR)
|
|
break;
|
|
#ifdef FILEC
|
|
}
|
|
#endif
|
|
if (c <= 0)
|
|
return (-1);
|
|
feobp += c;
|
|
#ifndef FILEC
|
|
goto again;
|
|
#else
|
|
if (filec && !intty)
|
|
goto again;
|
|
#endif
|
|
}
|
|
c = fbuf[buf][(int)fseekp % BUFSIZE];
|
|
fseekp++;
|
|
return (int)(c);
|
|
}
|
|
|
|
static void
|
|
bfree(void)
|
|
{
|
|
int i, sb;
|
|
|
|
if (cantell)
|
|
return;
|
|
if (whyles)
|
|
return;
|
|
sb = (int)(fseekp - 1) / BUFSIZE;
|
|
if (sb > 0) {
|
|
for (i = 0; i < sb; i++)
|
|
xfree((ptr_t) fbuf[i]);
|
|
(void)blkcpy(fbuf, &fbuf[sb]);
|
|
fseekp -= BUFSIZE * sb;
|
|
feobp -= BUFSIZE * sb;
|
|
fblocks -= sb;
|
|
}
|
|
}
|
|
|
|
void
|
|
bseek(struct Ain *l)
|
|
{
|
|
switch (aret = l->type) {
|
|
case A_SEEK:
|
|
alvec = l->a_seek;
|
|
alvecp = l->c_seek;
|
|
return;
|
|
case E_SEEK:
|
|
evalvec = l->a_seek;
|
|
evalp = 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(struct Ain *l)
|
|
{
|
|
switch (l->type = aret) {
|
|
case A_SEEK:
|
|
l->a_seek = alvec;
|
|
l->c_seek = alvecp;
|
|
return;
|
|
case E_SEEK:
|
|
l->a_seek = evalvec;
|
|
l->c_seek = evalp;
|
|
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)
|
|
{
|
|
(void)lseek(SHIN, (off_t) 0, SEEK_END);
|
|
aret = F_SEEK;
|
|
fseekp = feobp;
|
|
alvec = NULL;
|
|
alvecp = NULL;
|
|
evalvec = NULL;
|
|
evalp = NULL;
|
|
wfree();
|
|
bfree();
|
|
}
|
|
|
|
void
|
|
settell(void)
|
|
{
|
|
cantell = 0;
|
|
if (arginp || onelflg || intty)
|
|
return;
|
|
if (lseek(SHIN, (off_t) 0, SEEK_CUR) < 0 || errno == ESPIPE)
|
|
return;
|
|
fbuf = (Char **)xcalloc(2, sizeof(Char **));
|
|
fblocks = 1;
|
|
fbuf[0] = (Char *)xcalloc(BUFSIZE, sizeof(Char));
|
|
fseekp = fbobp = feobp = lseek(SHIN, (off_t) 0, SEEK_CUR);
|
|
cantell = 1;
|
|
}
|