991 lines
20 KiB
C
991 lines
20 KiB
C
/*-
|
|
* 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[] = "@(#)dol.c 8.1 (Berkeley) 5/31/93";
|
|
#else
|
|
static const char rcsid[] =
|
|
"$Id: dol.c,v 1.5 1997/02/22 14:01:47 peter Exp $";
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
#include <sys/types.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#if __STDC__
|
|
# include <stdarg.h>
|
|
#else
|
|
# include <varargs.h>
|
|
#endif
|
|
|
|
#include "csh.h"
|
|
#include "extern.h"
|
|
|
|
/*
|
|
* These routines perform variable substitution and quoting via ' and ".
|
|
* To this point these constructs have been preserved in the divided
|
|
* input words. Here we expand variables and turn quoting via ' and " into
|
|
* QUOTE bits on characters (which prevent further interpretation).
|
|
* If the `:q' modifier was applied during history expansion, then
|
|
* some QUOTEing may have occurred already, so we dont "trim()" here.
|
|
*/
|
|
|
|
static int Dpeekc, Dpeekrd; /* Peeks for DgetC and Dreadc */
|
|
static Char *Dcp, **Dvp; /* Input vector for Dreadc */
|
|
|
|
#define DEOF -1
|
|
|
|
#define unDgetC(c) Dpeekc = c
|
|
|
|
#define QUOTES (_QF|_QB|_ESC) /* \ ' " ` */
|
|
|
|
/*
|
|
* The following variables give the information about the current
|
|
* $ expansion, recording the current word position, the remaining
|
|
* words within this expansion, the count of remaining words, and the
|
|
* information about any : modifier which is being applied.
|
|
*/
|
|
#define MAXWLEN (BUFSIZ - 4)
|
|
#define MAXMOD MAXWLEN /* This cannot overflow */
|
|
static Char *dolp; /* Remaining chars from this word */
|
|
static Char **dolnxt; /* Further words */
|
|
static int dolcnt; /* Count of further words */
|
|
static Char dolmod[MAXMOD]; /* : modifier character */
|
|
static int dolnmod; /* Number of modifiers */
|
|
static int dolmcnt; /* :gx -> 10000, else 1 */
|
|
static int dolwcnt; /* :wx -> 10000, else 1 */
|
|
|
|
static void Dfix2 __P((Char **));
|
|
static Char *Dpack __P((Char *, Char *));
|
|
static int Dword __P((void));
|
|
static void dolerror __P((Char *));
|
|
static int DgetC __P((int));
|
|
static void Dgetdol __P((void));
|
|
static void fixDolMod __P((void));
|
|
static void setDolp __P((Char *));
|
|
static void unDredc __P((int));
|
|
static int Dredc __P((void));
|
|
static void Dtestq __P((int));
|
|
|
|
|
|
/*
|
|
* Fix up the $ expansions and quotations in the
|
|
* argument list to command t.
|
|
*/
|
|
void
|
|
Dfix(t)
|
|
struct command *t;
|
|
{
|
|
Char **pp;
|
|
Char *p;
|
|
|
|
if (noexec)
|
|
return;
|
|
/* Note that t_dcom isn't trimmed thus !...:q's aren't lost */
|
|
for (pp = t->t_dcom; (p = *pp++) != NULL;)
|
|
for (; *p; p++) {
|
|
if (cmap(*p, _DOL | QUOTES)) { /* $, \, ', ", ` */
|
|
Dfix2(t->t_dcom); /* found one */
|
|
blkfree(t->t_dcom);
|
|
t->t_dcom = gargv;
|
|
gargv = 0;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* $ substitute one word, for i/o redirection
|
|
*/
|
|
Char *
|
|
Dfix1(cp)
|
|
Char *cp;
|
|
{
|
|
Char *Dv[2];
|
|
|
|
if (noexec)
|
|
return (0);
|
|
Dv[0] = cp;
|
|
Dv[1] = NULL;
|
|
Dfix2(Dv);
|
|
if (gargc != 1) {
|
|
setname(vis_str(cp));
|
|
stderror(ERR_NAME | ERR_AMBIG);
|
|
}
|
|
cp = Strsave(gargv[0]);
|
|
blkfree(gargv), gargv = 0;
|
|
return (cp);
|
|
}
|
|
|
|
/*
|
|
* Subroutine to do actual fixing after state initialization.
|
|
*/
|
|
static void
|
|
Dfix2(v)
|
|
Char **v;
|
|
{
|
|
ginit(); /* Initialize glob's area pointers */
|
|
Dvp = v;
|
|
Dcp = STRNULL; /* Setup input vector for Dreadc */
|
|
unDgetC(0);
|
|
unDredc(0); /* Clear out any old peeks (at error) */
|
|
dolp = 0;
|
|
dolcnt = 0; /* Clear out residual $ expands (...) */
|
|
while (Dword())
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Pack up more characters in this word
|
|
*/
|
|
static Char *
|
|
Dpack(wbuf, wp)
|
|
Char *wbuf, *wp;
|
|
{
|
|
int c;
|
|
int i = MAXWLEN - (wp - wbuf);
|
|
|
|
for (;;) {
|
|
c = DgetC(DODOL);
|
|
if (c == '\\') {
|
|
c = DgetC(0);
|
|
if (c == DEOF) {
|
|
unDredc(c);
|
|
*wp = 0;
|
|
Gcat(STRNULL, wbuf);
|
|
return (NULL);
|
|
}
|
|
if (c == '\n')
|
|
c = ' ';
|
|
else
|
|
c |= QUOTE;
|
|
}
|
|
if (c == DEOF) {
|
|
unDredc(c);
|
|
*wp = 0;
|
|
Gcat(STRNULL, wbuf);
|
|
return (NULL);
|
|
}
|
|
if (cmap(c, _SP | _NL | _QF | _QB)) { /* sp \t\n'"` */
|
|
unDgetC(c);
|
|
if (cmap(c, QUOTES))
|
|
return (wp);
|
|
*wp++ = 0;
|
|
Gcat(STRNULL, wbuf);
|
|
return (NULL);
|
|
}
|
|
if (--i <= 0)
|
|
stderror(ERR_WTOOLONG);
|
|
*wp++ = c;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get a word. This routine is analogous to the routine
|
|
* word() in sh.lex.c for the main lexical input. One difference
|
|
* here is that we don't get a newline to terminate our expansion.
|
|
* Rather, DgetC will return a DEOF when we hit the end-of-input.
|
|
*/
|
|
static int
|
|
Dword()
|
|
{
|
|
int c, c1;
|
|
Char wbuf[BUFSIZ];
|
|
Char *wp = wbuf;
|
|
int i = MAXWLEN;
|
|
bool dolflg;
|
|
bool sofar = 0, done = 0;
|
|
|
|
while (!done) {
|
|
done = 1;
|
|
c = DgetC(DODOL);
|
|
switch (c) {
|
|
|
|
case DEOF:
|
|
if (sofar == 0)
|
|
return (0);
|
|
/* finish this word and catch the code above the next time */
|
|
unDredc(c);
|
|
/* fall into ... */
|
|
|
|
case '\n':
|
|
*wp = 0;
|
|
Gcat(STRNULL, wbuf);
|
|
return (1);
|
|
|
|
case ' ':
|
|
case '\t':
|
|
done = 0;
|
|
break;
|
|
|
|
case '`':
|
|
/* We preserve ` quotations which are done yet later */
|
|
*wp++ = c, --i;
|
|
case '\'':
|
|
case '"':
|
|
/*
|
|
* Note that DgetC never returns a QUOTES character from an
|
|
* expansion, so only true input quotes will get us here or out.
|
|
*/
|
|
c1 = c;
|
|
dolflg = c1 == '"' ? DODOL : 0;
|
|
for (;;) {
|
|
c = DgetC(dolflg);
|
|
if (c == c1)
|
|
break;
|
|
if (c == '\n' || c == DEOF)
|
|
stderror(ERR_UNMATCHED, c1);
|
|
if ((c & (QUOTE | TRIM)) == ('\n' | QUOTE))
|
|
--wp, ++i;
|
|
if (--i <= 0)
|
|
stderror(ERR_WTOOLONG);
|
|
switch (c1) {
|
|
|
|
case '"':
|
|
/*
|
|
* Leave any `s alone for later. Other chars are all
|
|
* quoted, thus `...` can tell it was within "...".
|
|
*/
|
|
*wp++ = c == '`' ? '`' : c | QUOTE;
|
|
break;
|
|
|
|
case '\'':
|
|
/* Prevent all further interpretation */
|
|
*wp++ = c | QUOTE;
|
|
break;
|
|
|
|
case '`':
|
|
/* Leave all text alone for later */
|
|
*wp++ = c;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
if (c1 == '`')
|
|
*wp++ = '`' /* i--; eliminated */;
|
|
sofar = 1;
|
|
if ((wp = Dpack(wbuf, wp)) == NULL)
|
|
return (1);
|
|
else {
|
|
i = MAXWLEN - (wp - wbuf);
|
|
done = 0;
|
|
}
|
|
break;
|
|
|
|
case '\\':
|
|
c = DgetC(0); /* No $ subst! */
|
|
if (c == '\n' || c == DEOF) {
|
|
done = 0;
|
|
break;
|
|
}
|
|
c |= QUOTE;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
if (done) {
|
|
unDgetC(c);
|
|
sofar = 1;
|
|
if ((wp = Dpack(wbuf, wp)) == NULL)
|
|
return (1);
|
|
else {
|
|
i = MAXWLEN - (wp - wbuf);
|
|
done = 0;
|
|
}
|
|
}
|
|
}
|
|
/* Really NOTREACHED */
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Get a character, performing $ substitution unless flag is 0.
|
|
* Any QUOTES character which is returned from a $ expansion is
|
|
* QUOTEd so that it will not be recognized above.
|
|
*/
|
|
static int
|
|
DgetC(flag)
|
|
int flag;
|
|
{
|
|
int c;
|
|
|
|
top:
|
|
if ((c = Dpeekc) != '\0') {
|
|
Dpeekc = 0;
|
|
return (c);
|
|
}
|
|
if (lap) {
|
|
c = *lap++ & (QUOTE | TRIM);
|
|
if (c == 0) {
|
|
lap = 0;
|
|
goto top;
|
|
}
|
|
quotspec:
|
|
if (cmap(c, QUOTES))
|
|
return (c | QUOTE);
|
|
return (c);
|
|
}
|
|
if (dolp) {
|
|
if ((c = *dolp++ & (QUOTE | TRIM)) != '\0')
|
|
goto quotspec;
|
|
if (dolcnt > 0) {
|
|
setDolp(*dolnxt++);
|
|
--dolcnt;
|
|
return (' ');
|
|
}
|
|
dolp = 0;
|
|
}
|
|
if (dolcnt > 0) {
|
|
setDolp(*dolnxt++);
|
|
--dolcnt;
|
|
goto top;
|
|
}
|
|
c = Dredc();
|
|
if (c == '$' && flag) {
|
|
Dgetdol();
|
|
goto top;
|
|
}
|
|
return (c);
|
|
}
|
|
|
|
static Char *nulvec[] = {0};
|
|
static struct varent nulargv = {nulvec, STRargv, { NULL, NULL, NULL }, 0};
|
|
|
|
static void
|
|
dolerror(s)
|
|
Char *s;
|
|
{
|
|
setname(vis_str(s));
|
|
stderror(ERR_NAME | ERR_RANGE);
|
|
}
|
|
|
|
/*
|
|
* Handle the multitudinous $ expansion forms.
|
|
* Ugh.
|
|
*/
|
|
static void
|
|
Dgetdol()
|
|
{
|
|
Char *np;
|
|
struct varent *vp = NULL;
|
|
Char name[4 * MAXVARLEN + 1];
|
|
int c, sc;
|
|
int subscr = 0, lwb = 1, upb = 0;
|
|
bool dimen = 0, bitset = 0;
|
|
char tnp;
|
|
Char wbuf[BUFSIZ];
|
|
static Char *dolbang = NULL;
|
|
|
|
dolnmod = dolmcnt = dolwcnt = 0;
|
|
c = sc = DgetC(0);
|
|
if (c == '{')
|
|
c = DgetC(0); /* sc is { to take } later */
|
|
if ((c & TRIM) == '#')
|
|
dimen++, c = DgetC(0); /* $# takes dimension */
|
|
else if (c == '?')
|
|
bitset++, c = DgetC(0); /* $? tests existence */
|
|
switch (c) {
|
|
|
|
case '!':
|
|
if (dimen || bitset)
|
|
stderror(ERR_SYNTAX);
|
|
if (backpid != 0) {
|
|
if (dolbang)
|
|
xfree((ptr_t) dolbang);
|
|
setDolp(dolbang = putn(backpid));
|
|
}
|
|
goto eatbrac;
|
|
|
|
case '$':
|
|
if (dimen || bitset)
|
|
stderror(ERR_SYNTAX);
|
|
setDolp(doldol);
|
|
goto eatbrac;
|
|
|
|
case '<' | QUOTE:
|
|
if (bitset)
|
|
stderror(ERR_NOTALLOWED, "$?<");
|
|
if (dimen)
|
|
stderror(ERR_NOTALLOWED, "$?#");
|
|
for (np = wbuf; read(OLDSTD, &tnp, 1) == 1; np++) {
|
|
*np = (unsigned char) tnp;
|
|
if (np >= &wbuf[BUFSIZ - 1])
|
|
stderror(ERR_LTOOLONG);
|
|
if (tnp == '\n')
|
|
break;
|
|
}
|
|
*np = 0;
|
|
/*
|
|
* KLUDGE: dolmod is set here because it will cause setDolp to call
|
|
* domod and thus to copy wbuf. Otherwise setDolp would use it
|
|
* directly. If we saved it ourselves, no one would know when to free
|
|
* it. The actual function of the 'q' causes filename expansion not to
|
|
* be done on the interpolated value.
|
|
*/
|
|
dolmod[dolnmod++] = 'q';
|
|
dolmcnt = 10000;
|
|
setDolp(wbuf);
|
|
goto eatbrac;
|
|
|
|
case DEOF:
|
|
case '\n':
|
|
stderror(ERR_SYNTAX);
|
|
/* NOTREACHED */
|
|
break;
|
|
|
|
case '*':
|
|
(void) Strcpy(name, STRargv);
|
|
vp = adrof(STRargv);
|
|
subscr = -1; /* Prevent eating [...] */
|
|
break;
|
|
|
|
default:
|
|
np = name;
|
|
if (Isdigit(c)) {
|
|
if (dimen)
|
|
stderror(ERR_NOTALLOWED, "$#<num>");
|
|
subscr = 0;
|
|
do {
|
|
subscr = subscr * 10 + c - '0';
|
|
c = DgetC(0);
|
|
} while (Isdigit(c));
|
|
unDredc(c);
|
|
if (subscr < 0) {
|
|
dolerror(vp->v_name);
|
|
return;
|
|
}
|
|
if (subscr == 0) {
|
|
if (bitset) {
|
|
dolp = ffile ? STR1 : STR0;
|
|
goto eatbrac;
|
|
}
|
|
if (ffile == 0)
|
|
stderror(ERR_DOLZERO);
|
|
fixDolMod();
|
|
setDolp(ffile);
|
|
goto eatbrac;
|
|
}
|
|
if (bitset)
|
|
stderror(ERR_DOLQUEST);
|
|
vp = adrof(STRargv);
|
|
if (vp == 0) {
|
|
vp = &nulargv;
|
|
goto eatmod;
|
|
}
|
|
break;
|
|
}
|
|
if (!alnum(c))
|
|
stderror(ERR_VARALNUM);
|
|
for (;;) {
|
|
*np++ = c;
|
|
c = DgetC(0);
|
|
if (!alnum(c))
|
|
break;
|
|
if (np >= &name[MAXVARLEN])
|
|
stderror(ERR_VARTOOLONG);
|
|
}
|
|
*np++ = 0;
|
|
unDredc(c);
|
|
vp = adrof(name);
|
|
}
|
|
if (bitset) {
|
|
dolp = (vp || getenv(short2str(name))) ? STR1 : STR0;
|
|
goto eatbrac;
|
|
}
|
|
if (vp == 0) {
|
|
np = str2short(getenv(short2str(name)));
|
|
if (np) {
|
|
fixDolMod();
|
|
setDolp(np);
|
|
goto eatbrac;
|
|
}
|
|
udvar(name);
|
|
/* NOTREACHED */
|
|
}
|
|
c = DgetC(0);
|
|
upb = blklen(vp->vec);
|
|
if (dimen == 0 && subscr == 0 && c == '[') {
|
|
np = name;
|
|
for (;;) {
|
|
c = DgetC(DODOL); /* Allow $ expand within [ ] */
|
|
if (c == ']')
|
|
break;
|
|
if (c == '\n' || c == DEOF)
|
|
stderror(ERR_INCBR);
|
|
if (np >= &name[sizeof(name) / sizeof(Char) - 2])
|
|
stderror(ERR_VARTOOLONG);
|
|
*np++ = c;
|
|
}
|
|
*np = 0, np = name;
|
|
if (dolp || dolcnt) /* $ exp must end before ] */
|
|
stderror(ERR_EXPORD);
|
|
if (!*np)
|
|
stderror(ERR_SYNTAX);
|
|
if (Isdigit(*np)) {
|
|
int i;
|
|
|
|
for (i = 0; Isdigit(*np); i = i * 10 + *np++ - '0')
|
|
continue;
|
|
if ((i < 0 || i > upb) && !any("-*", *np)) {
|
|
dolerror(vp->v_name);
|
|
return;
|
|
}
|
|
lwb = i;
|
|
if (!*np)
|
|
upb = lwb, np = STRstar;
|
|
}
|
|
if (*np == '*')
|
|
np++;
|
|
else if (*np != '-')
|
|
stderror(ERR_MISSING, '-');
|
|
else {
|
|
int i = upb;
|
|
|
|
np++;
|
|
if (Isdigit(*np)) {
|
|
i = 0;
|
|
while (Isdigit(*np))
|
|
i = i * 10 + *np++ - '0';
|
|
if (i < 0 || i > upb) {
|
|
dolerror(vp->v_name);
|
|
return;
|
|
}
|
|
}
|
|
if (i < lwb)
|
|
upb = lwb - 1;
|
|
else
|
|
upb = i;
|
|
}
|
|
if (lwb == 0) {
|
|
if (upb != 0) {
|
|
dolerror(vp->v_name);
|
|
return;
|
|
}
|
|
upb = -1;
|
|
}
|
|
if (*np)
|
|
stderror(ERR_SYNTAX);
|
|
}
|
|
else {
|
|
if (subscr > 0)
|
|
if (subscr > upb)
|
|
lwb = 1, upb = 0;
|
|
else
|
|
lwb = upb = subscr;
|
|
unDredc(c);
|
|
}
|
|
if (dimen) {
|
|
Char *cp = putn(upb - lwb + 1);
|
|
|
|
addla(cp);
|
|
xfree((ptr_t) cp);
|
|
}
|
|
else {
|
|
eatmod:
|
|
fixDolMod();
|
|
dolnxt = &vp->vec[lwb - 1];
|
|
dolcnt = upb - lwb + 1;
|
|
}
|
|
eatbrac:
|
|
if (sc == '{') {
|
|
c = Dredc();
|
|
if (c != '}')
|
|
stderror(ERR_MISSING, '}');
|
|
}
|
|
}
|
|
|
|
static void
|
|
fixDolMod()
|
|
{
|
|
int c;
|
|
|
|
c = DgetC(0);
|
|
if (c == ':') {
|
|
do {
|
|
c = DgetC(0), dolmcnt = 1, dolwcnt = 1;
|
|
if (c == 'g' || c == 'a') {
|
|
if (c == 'g')
|
|
dolmcnt = 10000;
|
|
else
|
|
dolwcnt = 10000;
|
|
c = DgetC(0);
|
|
}
|
|
if ((c == 'g' && dolmcnt != 10000) ||
|
|
(c == 'a' && dolwcnt != 10000)) {
|
|
if (c == 'g')
|
|
dolmcnt = 10000;
|
|
else
|
|
dolwcnt = 10000;
|
|
c = DgetC(0);
|
|
}
|
|
|
|
if (c == 's') { /* [eichin:19910926.0755EST] */
|
|
int delimcnt = 2;
|
|
int delim = DgetC(0);
|
|
dolmod[dolnmod++] = c;
|
|
dolmod[dolnmod++] = delim;
|
|
|
|
if (!delim || letter(delim)
|
|
|| Isdigit(delim) || any(" \t\n", delim)) {
|
|
seterror(ERR_BADSUBST);
|
|
break;
|
|
}
|
|
while ((c = DgetC(0)) != (-1)) {
|
|
dolmod[dolnmod++] = c;
|
|
if(c == delim) delimcnt--;
|
|
if(!delimcnt) break;
|
|
}
|
|
if(delimcnt) {
|
|
seterror(ERR_BADSUBST);
|
|
break;
|
|
}
|
|
continue;
|
|
}
|
|
if (!any("htrqxes", c))
|
|
stderror(ERR_BADMOD, c);
|
|
dolmod[dolnmod++] = c;
|
|
if (c == 'q')
|
|
dolmcnt = 10000;
|
|
}
|
|
while ((c = DgetC(0)) == ':');
|
|
unDredc(c);
|
|
}
|
|
else
|
|
unDredc(c);
|
|
}
|
|
|
|
static void
|
|
setDolp(cp)
|
|
Char *cp;
|
|
{
|
|
Char *dp;
|
|
int i;
|
|
|
|
if (dolnmod == 0 || dolmcnt == 0) {
|
|
dolp = cp;
|
|
return;
|
|
}
|
|
dp = cp = Strsave(cp);
|
|
for (i = 0; i < dolnmod; i++) {
|
|
/* handle s// [eichin:19910926.0510EST] */
|
|
if(dolmod[i] == 's') {
|
|
int delim;
|
|
Char *lhsub, *rhsub, *np;
|
|
size_t lhlen = 0, rhlen = 0;
|
|
int didmod = 0;
|
|
|
|
delim = dolmod[++i];
|
|
if (!delim || letter(delim)
|
|
|| Isdigit(delim) || any(" \t\n", delim)) {
|
|
seterror(ERR_BADSUBST);
|
|
break;
|
|
}
|
|
lhsub = &dolmod[++i];
|
|
while(dolmod[i] != delim && dolmod[++i]) {
|
|
lhlen++;
|
|
}
|
|
dolmod[i] = 0;
|
|
rhsub = &dolmod[++i];
|
|
while(dolmod[i] != delim && dolmod[++i]) {
|
|
rhlen++;
|
|
}
|
|
dolmod[i] = 0;
|
|
|
|
do {
|
|
dp = Strstr(cp, lhsub);
|
|
if (dp) {
|
|
np = (Char *) xmalloc((size_t)
|
|
((Strlen(cp) + 1 - lhlen + rhlen) *
|
|
sizeof(Char)));
|
|
(void) Strncpy(np, cp, dp - cp);
|
|
(void) Strcpy(np + (dp - cp), rhsub);
|
|
(void) Strcpy(np + (dp - cp) + rhlen, dp + lhlen);
|
|
|
|
xfree((ptr_t) cp);
|
|
dp = cp = np;
|
|
didmod = 1;
|
|
} else {
|
|
/* should this do a seterror? */
|
|
break;
|
|
}
|
|
}
|
|
while (dolwcnt == 10000);
|
|
/*
|
|
* restore dolmod for additional words
|
|
*/
|
|
dolmod[i] = rhsub[-1] = delim;
|
|
if (didmod)
|
|
dolmcnt--;
|
|
else
|
|
break;
|
|
} else {
|
|
int didmod = 0;
|
|
|
|
do {
|
|
if ((dp = domod(cp, dolmod[i]))) {
|
|
didmod = 1;
|
|
if (Strcmp(cp, dp) == 0) {
|
|
xfree((ptr_t) cp);
|
|
cp = dp;
|
|
break;
|
|
}
|
|
else {
|
|
xfree((ptr_t) cp);
|
|
cp = dp;
|
|
}
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
while (dolwcnt == 10000);
|
|
dp = cp;
|
|
if (didmod)
|
|
dolmcnt--;
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (dp) {
|
|
addla(dp);
|
|
xfree((ptr_t) dp);
|
|
}
|
|
else
|
|
addla(cp);
|
|
|
|
dolp = STRNULL;
|
|
if (seterr)
|
|
stderror(ERR_OLD);
|
|
}
|
|
|
|
static void
|
|
unDredc(c)
|
|
int c;
|
|
{
|
|
|
|
Dpeekrd = c;
|
|
}
|
|
|
|
static int
|
|
Dredc()
|
|
{
|
|
int c;
|
|
|
|
if ((c = Dpeekrd) != '\0') {
|
|
Dpeekrd = 0;
|
|
return (c);
|
|
}
|
|
if (Dcp && (c = *Dcp++))
|
|
return (c & (QUOTE | TRIM));
|
|
if (*Dvp == 0) {
|
|
Dcp = 0;
|
|
return (DEOF);
|
|
}
|
|
Dcp = *Dvp++;
|
|
return (' ');
|
|
}
|
|
|
|
static void
|
|
Dtestq(c)
|
|
int c;
|
|
{
|
|
|
|
if (cmap(c, QUOTES))
|
|
gflag = 1;
|
|
}
|
|
|
|
/*
|
|
* Form a shell temporary file (in unit 0) from the words
|
|
* of the shell input up to EOF or a line the same as "term".
|
|
* Unit 0 should have been closed before this call.
|
|
*/
|
|
void
|
|
/*ARGSUSED*/
|
|
heredoc(term)
|
|
Char *term;
|
|
{
|
|
int c;
|
|
Char *Dv[2];
|
|
Char obuf[BUFSIZ], lbuf[BUFSIZ], mbuf[BUFSIZ];
|
|
int ocnt, lcnt, mcnt;
|
|
Char *lbp, *obp, *mbp;
|
|
Char **vp;
|
|
bool quoted;
|
|
char *tmp;
|
|
|
|
if (creat(tmp = short2str(shtemp), 0600) < 0)
|
|
stderror(ERR_SYSTEM, tmp, strerror(errno));
|
|
(void) close(0);
|
|
if (open(tmp, O_RDWR) < 0) {
|
|
int oerrno = errno;
|
|
|
|
(void) unlink(tmp);
|
|
errno = oerrno;
|
|
stderror(ERR_SYSTEM, tmp, strerror(errno));
|
|
}
|
|
(void) unlink(tmp); /* 0 0 inode! */
|
|
Dv[0] = term;
|
|
Dv[1] = NULL;
|
|
gflag = 0;
|
|
trim(Dv);
|
|
rscan(Dv, Dtestq);
|
|
quoted = gflag;
|
|
ocnt = BUFSIZ;
|
|
obp = obuf;
|
|
for (;;) {
|
|
/*
|
|
* Read up a line
|
|
*/
|
|
lbp = lbuf;
|
|
lcnt = BUFSIZ - 4;
|
|
for (;;) {
|
|
c = readc(1); /* 1 -> Want EOF returns */
|
|
if (c < 0 || c == '\n')
|
|
break;
|
|
if ((c &= TRIM) != '\0') {
|
|
*lbp++ = c;
|
|
if (--lcnt < 0) {
|
|
setname("<<");
|
|
stderror(ERR_NAME | ERR_OVERFLOW);
|
|
}
|
|
}
|
|
}
|
|
*lbp = 0;
|
|
|
|
/*
|
|
* Check for EOF or compare to terminator -- before expansion
|
|
*/
|
|
if (c < 0 || eq(lbuf, term)) {
|
|
(void) write(0, short2str(obuf), (size_t) (BUFSIZ - ocnt));
|
|
(void) lseek(0, 0l, L_SET);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* If term was quoted or -n just pass it on
|
|
*/
|
|
if (quoted || noexec) {
|
|
*lbp++ = '\n';
|
|
*lbp = 0;
|
|
for (lbp = lbuf; (c = *lbp++) != '\0';) {
|
|
*obp++ = c;
|
|
if (--ocnt == 0) {
|
|
(void) write(0, short2str(obuf), BUFSIZ);
|
|
obp = obuf;
|
|
ocnt = BUFSIZ;
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Term wasn't quoted so variable and then command expand the input
|
|
* line
|
|
*/
|
|
Dcp = lbuf;
|
|
Dvp = Dv + 1;
|
|
mbp = mbuf;
|
|
mcnt = BUFSIZ - 4;
|
|
for (;;) {
|
|
c = DgetC(DODOL);
|
|
if (c == DEOF)
|
|
break;
|
|
if ((c &= TRIM) == 0)
|
|
continue;
|
|
/* \ quotes \ $ ` here */
|
|
if (c == '\\') {
|
|
c = DgetC(0);
|
|
if (!any("$\\`", c))
|
|
unDgetC(c | QUOTE), c = '\\';
|
|
else
|
|
c |= QUOTE;
|
|
}
|
|
*mbp++ = c;
|
|
if (--mcnt == 0) {
|
|
setname("<<");
|
|
stderror(ERR_NAME | ERR_OVERFLOW);
|
|
}
|
|
}
|
|
*mbp++ = 0;
|
|
|
|
/*
|
|
* If any ` in line do command substitution
|
|
*/
|
|
mbp = mbuf;
|
|
if (any(short2str(mbp), '`')) {
|
|
/*
|
|
* 1 arg to dobackp causes substitution to be literal. Words are
|
|
* broken only at newlines so that all blanks and tabs are
|
|
* preserved. Blank lines (null words) are not discarded.
|
|
*/
|
|
vp = dobackp(mbuf, 1);
|
|
}
|
|
else
|
|
/* Setup trivial vector similar to return of dobackp */
|
|
Dv[0] = mbp, Dv[1] = NULL, vp = Dv;
|
|
|
|
/*
|
|
* Resurrect the words from the command substitution each separated by
|
|
* a newline. Note that the last newline of a command substitution
|
|
* will have been discarded, but we put a newline after the last word
|
|
* because this represents the newline after the last input line!
|
|
*/
|
|
for (; *vp; vp++) {
|
|
for (mbp = *vp; *mbp; mbp++) {
|
|
*obp++ = *mbp & TRIM;
|
|
if (--ocnt == 0) {
|
|
(void) write(0, short2str(obuf), BUFSIZ);
|
|
obp = obuf;
|
|
ocnt = BUFSIZ;
|
|
}
|
|
}
|
|
*obp++ = '\n';
|
|
if (--ocnt == 0) {
|
|
(void) write(0, short2str(obuf), BUFSIZ);
|
|
obp = obuf;
|
|
ocnt = BUFSIZ;
|
|
}
|
|
}
|
|
if (pargv)
|
|
blkfree(pargv), pargv = 0;
|
|
}
|
|
}
|