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Sync with NetBSD's revision 1.29 of this file.

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Obtained from: NetBSD
This commit is contained in:
Steve Price 1997-04-28 03:28:43 +00:00
parent f4eb55ba86
commit 96522b887c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=25233
1 changed files with 55 additions and 27 deletions
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82
bin/sh/expand.c
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@ -33,7 +33,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id$
* $Id: expand.c,v 1.16 1997/02/22 13:58:26 peter Exp $
*/
#ifndef lint
@ -97,7 +97,7 @@ STATIC char *exptilde __P((char *, int));
STATIC void expbackq __P((union node *, int, int));
STATIC int subevalvar __P((char *, char *, int, int, int, int));
STATIC char *evalvar __P((char *, int));
STATIC int varisset __P((char *));
STATIC int varisset __P((char *, int));
STATIC void varvalue __P((char *, int, int));
STATIC void recordregion __P((int, int, int));
STATIC void ifsbreakup __P((char *, struct arglist *));
@ -210,10 +210,10 @@ expandarg(arg, arglist, flag)
STATIC void
argstr(p, flag)
register char *p;
char *p;
int flag;
{
register char c;
char c;
int quotes = flag & (EXP_FULL | EXP_CASE); /* do CTLESC */
int firsteq = 1;
@ -325,6 +325,16 @@ expari(flag)
int result;
int quotes = flag & (EXP_FULL | EXP_CASE);
while (ifsfirst.next != NULL) {
struct ifsregion *ifsp;
INTOFF;
ifsp = ifsfirst.next->next;
ckfree(ifsfirst.next);
ifsfirst.next = ifsp;
INTON;
}
ifslastp = NULL;
/*
* This routine is slightly over-compilcated for
* efficiency. First we make sure there is
@ -487,7 +497,7 @@ subevalvar(p, str, strloc, subtype, startloc, varflags)
return 0;
case VSTRIMLEFT:
for (loc = startp; loc < str - 1; loc++) {
for (loc = startp; loc < str; loc++) {
c = *loc;
*loc = '\0';
if (patmatch(str, startp)) {
@ -576,7 +586,7 @@ evalvar(p, flag)
p = strchr(p, '=') + 1;
again: /* jump here after setting a variable with ${var=text} */
if (special) {
set = varisset(var);
set = varisset(var, varflags & VSNUL);
val = NULL;
} else {
val = lookupvar(var);
@ -591,12 +601,10 @@ again: /* jump here after setting a variable with ${var=text} */
if (set && subtype != VSPLUS) {
/* insert the value of the variable */
if (special) {
char *exp, *oexpdest = expdest;
varvalue(var, varflags & VSQUOTE, flag & EXP_FULL);
if (subtype == VSLENGTH) {
for (exp = oexpdest;exp != expdest; exp++)
varlen++;
expdest = oexpdest;
varlen = expdest - stackblock() - startloc;
STADJUST(-varlen, expdest);
}
} else {
char const *syntax = (varflags & VSQUOTE) ? DQSYNTAX
@ -662,6 +670,10 @@ record:
if (subevalvar(p, NULL, expdest - stackblock(), subtype,
startloc, varflags))
goto record;
else {
int amount = (expdest - pat) + 1;
STADJUST(-amount, expdest);
}
break;
case VSASSIGN:
@ -708,23 +720,39 @@ record:
*/
STATIC int
varisset(name)
varisset(name, nulok)
char *name;
{
char **ap;
int nulok;
{
if (*name == '!') {
if (backgndpid == -1)
return 0;
} else if (*name == '@' || *name == '*') {
if (*name == '!')
return backgndpid != -1;
else if (*name == '@' || *name == '*') {
if (*shellparam.p == NULL)
return 0;
if (nulok) {
char **av;
for (av = shellparam.p; *av; av++)
if (**av != '\0')
return 1;
return 0;
}
} else if (is_digit(*name)) {
char *ap;
int num = atoi(name);
ap = shellparam.p;
while (--num >= 0)
if (*ap++ == NULL)
return 0;
if (num > shellparam.nparam)
return 0;
if (num == 0)
ap = arg0;
else
ap = shellparam.p[num - 1];
if (nulok && (ap == NULL || *ap == '\0'))
return 0;
}
return 1;
}
@ -829,7 +857,7 @@ recordregion(start, end, nulonly)
int end;
int nulonly;
{
register struct ifsregion *ifsp;
struct ifsregion *ifsp;
if (ifslastp == NULL) {
ifsp = &ifsfirst;
@ -859,7 +887,7 @@ ifsbreakup(string, arglist)
struct ifsregion *ifsp;
struct strlist *sp;
char *start;
register char *p;
char *p;
char *q;
char *ifs;
int ifsspc;
@ -986,7 +1014,7 @@ expmeta(enddir, name)
char *enddir;
char *name;
{
register char *p;
char *p;
char *q;
char *start;
char *endname;
@ -1202,8 +1230,8 @@ pmatch(pattern, string)
char *pattern;
char *string;
{
register char *p, *q;
register char c;
char *p, *q;
char c;
p = pattern;
q = string;
@ -1302,7 +1330,7 @@ void
rmescapes(str)
char *str;
{
register char *p, *q;
char *p, *q;
p = str;
while (*p != CTLESC) {