[p5sagit/p5-mst-13.2.git] / stab.c

/* $Header: stab.c,v 3.0.1.5 90/03/12 17:00:11 lwall Locked $
 *
 *    Copyright (c) 1989, Larry Wall
 *
 *    You may distribute under the terms of the GNU General Public License
 *    as specified in the README file that comes with the perl 3.0 kit.
 *
 * $Log:	stab.c,v $
 * Revision 3.0.1.5  90/03/12  17:00:11  lwall
 * patch13: undef $/ didn't work as advertised
 * 
 * Revision 3.0.1.4  90/02/28  18:19:14  lwall
 * patch9: $0 is now always the command name
 * patch9: you may now undef $/ to have no input record separator
 * patch9: local($.) didn't work
 * patch9: sometimes perl thought ordinary data was a symbol table entry
 * patch9: stab_array() and stab_hash() weren't defined on MICROPORT
 * 
 * Revision 3.0.1.3  89/12/21  20:18:40  lwall
 * patch7: ANSI strerror() is now supported
 * patch7: errno may now be a macro with an lvalue
 * patch7: in stab.c, sighandler() may now return either void or int
 * 
 * Revision 3.0.1.2  89/11/17  15:35:37  lwall
 * patch5: sighandler() needed to be static
 * 
 * Revision 3.0.1.1  89/11/11  04:55:07  lwall
 * patch2: sys_errlist[sys_nerr] is illegal
 * 
 * Revision 3.0  89/10/18  15:23:23  lwall
 * 3.0 baseline
 * 
 */

#include "EXTERN.h"
#include "perl.h"

#include <signal.h>

static char *sig_name[] = {
    SIG_NAME,0
};

#ifdef VOIDSIG
#define handlertype void
#else
#define handlertype int
#endif

STR *
stab_str(str)
STR *str;
{
    STAB *stab = str->str_u.str_stab;
    register int paren;
    register char *s;
    register int i;

    if (str->str_rare)
	return stab_val(stab);

    switch (*stab->str_magic->str_ptr) {
    case '1': case '2': case '3': case '4':
    case '5': case '6': case '7': case '8': case '9': case '&':
	if (curspat) {
	    paren = atoi(stab_name(stab));
	  getparen:
	    if (curspat->spat_regexp &&
	      paren <= curspat->spat_regexp->nparens &&
	      (s = curspat->spat_regexp->startp[paren]) ) {
		i = curspat->spat_regexp->endp[paren] - s;
		if (i >= 0)
		    str_nset(stab_val(stab),s,i);
		else
		    str_sset(stab_val(stab),&str_undef);
	    }
	    else
		str_sset(stab_val(stab),&str_undef);
	}
	break;
    case '+':
	if (curspat) {
	    paren = curspat->spat_regexp->lastparen;
	    goto getparen;
	}
	break;
    case '`':
	if (curspat) {
	    if (curspat->spat_regexp &&
	      (s = curspat->spat_regexp->subbase) ) {
		i = curspat->spat_regexp->startp[0] - s;
		if (i >= 0)
		    str_nset(stab_val(stab),s,i);
		else
		    str_nset(stab_val(stab),"",0);
	    }
	    else
		str_nset(stab_val(stab),"",0);
	}
	break;
    case '\'':
	if (curspat) {
	    if (curspat->spat_regexp &&
	      (s = curspat->spat_regexp->endp[0]) ) {
		str_set(stab_val(stab),s);
	    }
	    else
		str_nset(stab_val(stab),"",0);
	}
	break;
    case '.':
#ifndef lint
	if (last_in_stab) {
	    str_numset(stab_val(stab),(double)stab_io(last_in_stab)->lines);
	}
#endif
	break;
    case '?':
	str_numset(stab_val(stab),(double)statusvalue);
	break;
    case '^':
	s = stab_io(curoutstab)->top_name;
	str_set(stab_val(stab),s);
	break;
    case '~':
	s = stab_io(curoutstab)->fmt_name;
	str_set(stab_val(stab),s);
	break;
#ifndef lint
    case '=':
	str_numset(stab_val(stab),(double)stab_io(curoutstab)->page_len);
	break;
    case '-':
	str_numset(stab_val(stab),(double)stab_io(curoutstab)->lines_left);
	break;
    case '%':
	str_numset(stab_val(stab),(double)stab_io(curoutstab)->page);
	break;
#endif
    case '/':
	if (record_separator != 12345) {
	    *tokenbuf = record_separator;
	    tokenbuf[1] = '\0';
	    str_nset(stab_val(stab),tokenbuf,rslen);
	}
	break;
    case '[':
	str_numset(stab_val(stab),(double)arybase);
	break;
    case '|':
	str_numset(stab_val(stab),
	   (double)((stab_io(curoutstab)->flags & IOF_FLUSH) != 0) );
	break;
    case ',':
	str_nset(stab_val(stab),ofs,ofslen);
	break;
    case '\\':
	str_nset(stab_val(stab),ors,orslen);
	break;
    case '#':
	str_set(stab_val(stab),ofmt);
	break;
    case '!':
	str_numset(stab_val(stab), (double)errno);
	str_set(stab_val(stab), strerror(errno));
	stab_val(stab)->str_nok = 1;	/* what a wonderful hack! */
	break;
    case '<':
	str_numset(stab_val(stab),(double)uid);
	break;
    case '>':
	str_numset(stab_val(stab),(double)euid);
	break;
    case '(':
	s = buf;
	(void)sprintf(s,"%d",(int)gid);
	goto add_groups;
    case ')':
	s = buf;
	(void)sprintf(s,"%d",(int)egid);
      add_groups:
	while (*s) s++;
#ifdef GETGROUPS
#ifndef NGROUPS
#define NGROUPS 32
#endif
	{
	    GIDTYPE gary[NGROUPS];

	    i = getgroups(NGROUPS,gary);
	    while (--i >= 0) {
		(void)sprintf(s," %ld", (long)gary[i]);
		while (*s) s++;
	    }
	}
#endif
	str_set(stab_val(stab),buf);
	break;
    }
    return stab_val(stab);
}

stabset(mstr,str)
register STR *mstr;
STR *str;
{
    STAB *stab = mstr->str_u.str_stab;
    char *s;
    int i;
    static handlertype sighandler();

    switch (mstr->str_rare) {
    case 'E':
	setenv(mstr->str_ptr,str_get(str));
				/* And you'll never guess what the dog had */
	break;			/*   in its mouth... */
    case 'S':
	s = str_get(str);
	i = whichsig(mstr->str_ptr);	/* ...no, a brick */
	if (strEQ(s,"IGNORE"))
#ifndef lint
	    (void)signal(i,SIG_IGN);
#else
	    ;
#endif
	else if (strEQ(s,"DEFAULT") || !*s)
	    (void)signal(i,SIG_DFL);
	else
	    (void)signal(i,sighandler);
	break;
#ifdef SOME_DBM
    case 'D':
	hdbmstore(stab_hash(stab),mstr->str_ptr,mstr->str_cur,str);
	break;
#endif
    case '#':
	afill(stab_array(stab), (int)str_gnum(str) - arybase);
	break;
    case 'X':	/* merely a copy of a * string */
	break;
    case '*':
	s = str_get(str);
	if (strNE(s,"StB") || str->str_cur != sizeof(STBP)) {
	    if (!*s) {
		STBP *stbp;

		(void)savenostab(stab);	/* schedule a free of this stab */
		if (stab->str_len)
		    Safefree(stab->str_ptr);
		Newz(601,stbp, 1, STBP);
		stab->str_ptr = stbp;
		stab->str_len = stab->str_cur = sizeof(STBP);
		stab->str_pok = 1;
		strcpy(stab_magic(stab),"StB");
		stab_val(stab) = Str_new(70,0);
		stab_line(stab) = line;
	    }
	    else
		stab = stabent(s,TRUE);
	    str_sset(str,stab);
	}
	break;
    case 's': {
	    struct lstring *lstr = (struct lstring*)str;

	    mstr->str_rare = 0;
	    str->str_magic = Nullstr;
	    str_insert(mstr,lstr->lstr_offset,lstr->lstr_len,
	      str->str_ptr,str->str_cur);
	}
	break;

    case 'v':
	do_vecset(mstr,str);
	break;

    case 0:
	switch (*stab->str_magic->str_ptr) {
	case '.':
	    if (localizing)
		savesptr((STR**)&last_in_stab);
	    break;
	case '^':
	    Safefree(stab_io(curoutstab)->top_name);
	    stab_io(curoutstab)->top_name = s = savestr(str_get(str));
	    stab_io(curoutstab)->top_stab = stabent(s,TRUE);
	    break;
	case '~':
	    Safefree(stab_io(curoutstab)->fmt_name);
	    stab_io(curoutstab)->fmt_name = s = savestr(str_get(str));
	    stab_io(curoutstab)->fmt_stab = stabent(s,TRUE);
	    break;
	case '=':
	    stab_io(curoutstab)->page_len = (long)str_gnum(str);
	    break;
	case '-':
	    stab_io(curoutstab)->lines_left = (long)str_gnum(str);
	    if (stab_io(curoutstab)->lines_left < 0L)
		stab_io(curoutstab)->lines_left = 0L;
	    break;
	case '%':
	    stab_io(curoutstab)->page = (long)str_gnum(str);
	    break;
	case '|':
	    stab_io(curoutstab)->flags &= ~IOF_FLUSH;
	    if (str_gnum(str) != 0.0) {
		stab_io(curoutstab)->flags |= IOF_FLUSH;
	    }
	    break;
	case '*':
	    i = (int)str_gnum(str);
	    multiline = (i != 0);
	    break;
	case '/':
	    if (str->str_pok) {
		record_separator = *str_get(str);
		rslen = str->str_cur;
	    }
	    else {
		record_separator = 12345;	/* fake a non-existent char */
		rslen = 1;
	    }
	    break;
	case '\\':
	    if (ors)
		Safefree(ors);
	    ors = savestr(str_get(str));
	    orslen = str->str_cur;
	    break;
	case ',':
	    if (ofs)
		Safefree(ofs);
	    ofs = savestr(str_get(str));
	    ofslen = str->str_cur;
	    break;
	case '#':
	    if (ofmt)
		Safefree(ofmt);
	    ofmt = savestr(str_get(str));
	    break;
	case '[':
	    arybase = (int)str_gnum(str);
	    break;
	case '?':
	    statusvalue = (unsigned short)str_gnum(str);
	    break;
	case '!':
	    errno = (int)str_gnum(str);		/* will anyone ever use this? */
	    break;
	case '<':
	    uid = (int)str_gnum(str);
#ifdef SETREUID
	    if (delaymagic) {
		delaymagic |= DM_REUID;
		break;				/* don't do magic till later */
	    }
#endif /* SETREUID */
#ifdef SETRUID
	    if (setruid((UIDTYPE)uid) < 0)
		uid = (int)getuid();
#else
#ifdef SETREUID
	    if (setreuid((UIDTYPE)uid, (UIDTYPE)-1) < 0)
		uid = (int)getuid();
#else
	    fatal("setruid() not implemented");
#endif
#endif
	    break;
	case '>':
	    euid = (int)str_gnum(str);
#ifdef SETREUID
	    if (delaymagic) {
		delaymagic |= DM_REUID;
		break;				/* don't do magic till later */
	    }
#endif /* SETREUID */
#ifdef SETEUID
	    if (seteuid((UIDTYPE)euid) < 0)
		euid = (int)geteuid();
#else
#ifdef SETREUID
	    if (setreuid((UIDTYPE)-1, (UIDTYPE)euid) < 0)
		euid = (int)geteuid();
#else
	    fatal("seteuid() not implemented");
#endif
#endif
	    break;
	case '(':
	    gid = (int)str_gnum(str);
#ifdef SETREGID
	    if (delaymagic) {
		delaymagic |= DM_REGID;
		break;				/* don't do magic till later */
	    }
#endif /* SETREGID */
#ifdef SETRGID
	    (void)setrgid((GIDTYPE)gid);
#else
#ifdef SETREGID
	    (void)setregid((GIDTYPE)gid, (GIDTYPE)-1);
#else
	    fatal("setrgid() not implemented");
#endif
#endif
	    break;
	case ')':
	    egid = (int)str_gnum(str);
#ifdef SETREGID
	    if (delaymagic) {
		delaymagic |= DM_REGID;
		break;				/* don't do magic till later */
	    }
#endif /* SETREGID */
#ifdef SETEGID
	    (void)setegid((GIDTYPE)egid);
#else
#ifdef SETREGID
	    (void)setregid((GIDTYPE)-1, (GIDTYPE)egid);
#else
	    fatal("setegid() not implemented");
#endif
#endif
	    break;
	case ':':
	    chopset = str_get(str);
	    break;
	}
	break;
    }
}

whichsig(sig)
char *sig;
{
    register char **sigv;

    for (sigv = sig_name+1; *sigv; sigv++)
	if (strEQ(sig,*sigv))
	    return sigv - sig_name;
#ifdef SIGCLD
    if (strEQ(sig,"CHLD"))
	return SIGCLD;
#endif
#ifdef SIGCHLD
    if (strEQ(sig,"CLD"))
	return SIGCHLD;
#endif
    return 0;
}

static handlertype
sighandler(sig)
int sig;
{
    STAB *stab;
    ARRAY *savearray;
    STR *str;
    char *oldfile = filename;
    int oldsave = savestack->ary_fill;
    ARRAY *oldstack = stack;
    SUBR *sub;

    stab = stabent(
	str_get(hfetch(stab_hash(sigstab),sig_name[sig],strlen(sig_name[sig]),
	  TRUE)), TRUE);
    sub = stab_sub(stab);
    if (!sub && *sig_name[sig] == 'C' && instr(sig_name[sig],"LD")) {
	if (sig_name[sig][1] == 'H')
	    stab = stabent(str_get(hfetch(stab_hash(sigstab),"CLD",3,TRUE)),
	      TRUE);
	else
	    stab = stabent(str_get(hfetch(stab_hash(sigstab),"CHLD",4,TRUE)),
	      TRUE);
	sub = stab_sub(stab);	/* gag */
    }
    if (!sub) {
	if (dowarn)
	    warn("SIG%s handler \"%s\" not defined.\n",
		sig_name[sig], stab_name(stab) );
	return;
    }
    savearray = stab_xarray(defstab);
    stab_xarray(defstab) = stack = anew(defstab);
    stack->ary_flags = 0;
    str = Str_new(71,0);
    str_set(str,sig_name[sig]);
    (void)apush(stab_xarray(defstab),str);
    sub->depth++;
    if (sub->depth >= 2) {	/* save temporaries on recursion? */
	if (sub->depth == 100 && dowarn)
	    warn("Deep recursion on subroutine \"%s\"",stab_name(stab));
	savelist(sub->tosave->ary_array,sub->tosave->ary_fill);
    }
    filename = sub->filename;

    (void)cmd_exec(sub->cmd,G_SCALAR,1);		/* so do it already */

    sub->depth--;	/* assuming no longjumps out of here */
    str_free(stack->ary_array[0]);	/* free the one real string */
    afree(stab_xarray(defstab));  /* put back old $_[] */
    stab_xarray(defstab) = savearray;
    stack = oldstack;
    filename = oldfile;
    if (savestack->ary_fill > oldsave)
	restorelist(oldsave);
}

STAB *
aadd(stab)
register STAB *stab;
{
    if (!stab_xarray(stab))
	stab_xarray(stab) = anew(stab);
    return stab;
}

STAB *
hadd(stab)
register STAB *stab;
{
    if (!stab_xhash(stab))
	stab_xhash(stab) = hnew(COEFFSIZE);
    return stab;
}

STAB *
stabent(name,add)
register char *name;
int add;
{
    register STAB *stab;
    register STBP *stbp;
    int len;
    register char *namend;
    HASH *stash;
    char *sawquote = Nullch;
    char *prevquote = Nullch;
    bool global = FALSE;

    if (isascii(*name) && isupper(*name)) {
	if (*name > 'I') {
	    if (*name == 'S' && (
	      strEQ(name, "SIG") ||
	      strEQ(name, "STDIN") ||
	      strEQ(name, "STDOUT") ||
	      strEQ(name, "STDERR") ))
		global = TRUE;
	}
	else if (*name > 'E') {
	    if (*name == 'I' && strEQ(name, "INC"))
		global = TRUE;
	}
	else if (*name >= 'A') {
	    if (*name == 'E' && strEQ(name, "ENV"))
		global = TRUE;
	}
	else if (*name == 'A' && (
	  strEQ(name, "ARGV") ||
	  strEQ(name, "ARGVOUT") ))
	    global = TRUE;
    }
    for (namend = name; *namend; namend++) {
	if (*namend == '\'' && namend[1])
	    prevquote = sawquote, sawquote = namend;
    }
    if (sawquote == name && name[1]) {
	stash = defstash;
	sawquote = Nullch;
	name++;
    }
    else if (!isalpha(*name) || global)
	stash = defstash;
    else
	stash = curstash;
    if (sawquote) {
	char tmpbuf[256];
	char *s, *d;

	*sawquote = '\0';
	if (s = prevquote) {
	    strncpy(tmpbuf,name,s-name+1);
	    d = tmpbuf+(s-name+1);
	    *d++ = '_';
	    strcpy(d,s+1);
	}
	else {
	    *tmpbuf = '_';
	    strcpy(tmpbuf+1,name);
	}
	stab = stabent(tmpbuf,TRUE);
	if (!(stash = stab_xhash(stab)))
	    stash = stab_xhash(stab) = hnew(0);
	name = sawquote+1;
	*sawquote = '\'';
    }
    len = namend - name;
    stab = (STAB*)hfetch(stash,name,len,add);
    if (!stab)
	return Nullstab;
    if (stab->str_pok) {
	stab->str_pok |= SP_MULTI;
	return stab;
    }
    else {
	if (stab->str_len)
	    Safefree(stab->str_ptr);
	Newz(602,stbp, 1, STBP);
	stab->str_ptr = stbp;
	stab->str_len = stab->str_cur = sizeof(STBP);
	stab->str_pok = 1;
	strcpy(stab_magic(stab),"StB");
	stab_val(stab) = Str_new(72,0);
	stab_line(stab) = line;
	str_magic(stab,stab,'*',name,len);
	return stab;
    }
}

STIO *
stio_new()
{
    STIO *stio;

    Newz(603,stio,1,STIO);
    stio->page_len = 60;
    return stio;
}

stab_check(min,max)
int min;
register int max;
{
    register HENT *entry;
    register int i;
    register STAB *stab;

    for (i = min; i <= max; i++) {
	for (entry = defstash->tbl_array[i]; entry; entry = entry->hent_next) {
	    stab = (STAB*)entry->hent_val;
	    if (stab->str_pok & SP_MULTI)
		continue;
	    line = stab_line(stab);
	    warn("Possible typo: \"%s\"", stab_name(stab));
	}
    }
}

static int gensym = 0;

STAB *
genstab()
{
    (void)sprintf(tokenbuf,"_GEN_%d",gensym++);
    return stabent(tokenbuf,TRUE);
}

/* hopefully this is only called on local symbol table entries */

void
stab_clear(stab)
register STAB *stab;
{
    STIO *stio;
    SUBR *sub;

    afree(stab_xarray(stab));
    (void)hfree(stab_xhash(stab));
    str_free(stab_val(stab));
    if (stio = stab_io(stab)) {
	do_close(stab,FALSE);
	Safefree(stio->top_name);
	Safefree(stio->fmt_name);
    }
    if (sub = stab_sub(stab)) {
	afree(sub->tosave);
	cmd_free(sub->cmd);
    }
    Safefree(stab->str_ptr);
    stab->str_ptr = Null(STBP*);
    stab->str_len = 0;
    stab->str_cur = 0;
}

#if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286))
#define MICROPORT
#endif

#ifdef	MICROPORT	/* Microport 2.4 hack */
ARRAY *stab_array(stab)
register STAB *stab;
{
    if (((STBP*)(stab->str_ptr))->stbp_array) 
	return ((STBP*)(stab->str_ptr))->stbp_array;
    else
	return ((STBP*)(aadd(stab)->str_ptr))->stbp_array;
}

HASH *stab_hash(stab)
register STAB *stab;
{
    if (((STBP*)(stab->str_ptr))->stbp_hash)
	return ((STBP*)(stab->str_ptr))->stbp_hash;
    else
	return ((STBP*)(hadd(stab)->str_ptr))->stbp_hash;
}
#endif			/* Microport 2.4 hack */
Commit	Line	Data
79a0689e	1	/* $Header: stab.c,v 3.0.1.5 90/03/12 17:00:11 lwall Locked $
a687059c	2	*
	3	* Copyright (c) 1989, Larry Wall
	4	*
	5	* You may distribute under the terms of the GNU General Public License
	6	* as specified in the README file that comes with the perl 3.0 kit.
8d063cd8	7	*
8d063cd8	8	* $Log: stab.c,v $
79a0689e	9	* Revision 3.0.1.5 90/03/12 17:00:11 lwall
	10	* patch13: undef $/ didn't work as advertised
	11	*
9f68db38	12	* Revision 3.0.1.4 90/02/28 18:19:14 lwall
	13	* patch9: $0 is now always the command name
	14	* patch9: you may now undef $/ to have no input record separator
	15	* patch9: local($.) didn't work
	16	* patch9: sometimes perl thought ordinary data was a symbol table entry
	17	* patch9: stab_array() and stab_hash() weren't defined on MICROPORT
	18	*
663a0e37	19	* Revision 3.0.1.3 89/12/21 20:18:40 lwall
	20	* patch7: ANSI strerror() is now supported
	21	* patch7: errno may now be a macro with an lvalue
	22	* patch7: in stab.c, sighandler() may now return either void or int
	23	*
ffed7fef	24	* Revision 3.0.1.2 89/11/17 15:35:37 lwall
	25	* patch5: sighandler() needed to be static
	26	*
ae986130	27	* Revision 3.0.1.1 89/11/11 04:55:07 lwall
	28	* patch2: sys_errlist[sys_nerr] is illegal
	29	*
a687059c	30	* Revision 3.0 89/10/18 15:23:23 lwall
a687059c	31	* 3.0 baseline
8d063cd8	32	*
	33	*/
	34
8d063cd8	35	#include "EXTERN.h"
8d063cd8	36	#include "perl.h"
8d063cd8	37
378cc40b	38	#include <signal.h>
378cc40b	39
8d063cd8	40	static char *sig_name[] = {
a687059c	41	SIG_NAME,0
a687059c	42	};
8d063cd8	43
663a0e37	44	#ifdef VOIDSIG
	45	#define handlertype void
	46	#else
	47	#define handlertype int
	48	#endif
2e1b3b7e	49
8d063cd8	50	STR *
a687059c	51	stab_str(str)
a687059c	52	STR *str;
8d063cd8	53	{
a687059c	54	STAB *stab = str->str_u.str_stab;
8d063cd8	55	register int paren;
8d063cd8	56	register char *s;
378cc40b	57	register int i;
8d063cd8	58
a687059c	59	if (str->str_rare)
	60	return stab_val(stab);
	61
	62	switch (*stab->str_magic->str_ptr) {
9f68db38	63	case '1': case '2': case '3': case '4':
8d063cd8	64	case '5': case '6': case '7': case '8': case '9': case '&':
8d063cd8	65	if (curspat) {
a687059c	66	paren = atoi(stab_name(stab));
378cc40b	67	getparen:
	68	if (curspat->spat_regexp &&
	69	paren <= curspat->spat_regexp->nparens &&
	70	(s = curspat->spat_regexp->startp[paren]) ) {
	71	i = curspat->spat_regexp->endp[paren] - s;
	72	if (i >= 0)
a687059c	73	str_nset(stab_val(stab),s,i);
378cc40b	74	else
a687059c	75	str_sset(stab_val(stab),&str_undef);
8d063cd8	76	}
378cc40b	77	else
a687059c	78	str_sset(stab_val(stab),&str_undef);
8d063cd8	79	}
	80	break;
	81	case '+':
	82	if (curspat) {
378cc40b	83	paren = curspat->spat_regexp->lastparen;
378cc40b	84	goto getparen;
8d063cd8	85	}
8d063cd8	86	break;
a687059c	87	case '`':
	88	if (curspat) {
	89	if (curspat->spat_regexp &&
	90	(s = curspat->spat_regexp->subbase) ) {
	91	i = curspat->spat_regexp->startp[0] - s;
	92	if (i >= 0)
	93	str_nset(stab_val(stab),s,i);
	94	else
	95	str_nset(stab_val(stab),"",0);
	96	}
	97	else
	98	str_nset(stab_val(stab),"",0);
	99	}
	100	break;
	101	case '\'':
	102	if (curspat) {
	103	if (curspat->spat_regexp &&
	104	(s = curspat->spat_regexp->endp[0]) ) {
	105	str_set(stab_val(stab),s);
	106	}
	107	else
	108	str_nset(stab_val(stab),"",0);
	109	}
	110	break;
8d063cd8	111	case '.':
a687059c	112	#ifndef lint
8d063cd8	113	if (last_in_stab) {
a687059c	114	str_numset(stab_val(stab),(double)stab_io(last_in_stab)->lines);
8d063cd8	115	}
a687059c	116	#endif
8d063cd8	117	break;
8d063cd8	118	case '?':
a687059c	119	str_numset(stab_val(stab),(double)statusvalue);
8d063cd8	120	break;
8d063cd8	121	case '^':
a687059c	122	s = stab_io(curoutstab)->top_name;
a687059c	123	str_set(stab_val(stab),s);
8d063cd8	124	break;
8d063cd8	125	case '~':
a687059c	126	s = stab_io(curoutstab)->fmt_name;
a687059c	127	str_set(stab_val(stab),s);
8d063cd8	128	break;
a687059c	129	#ifndef lint
8d063cd8	130	case '=':
a687059c	131	str_numset(stab_val(stab),(double)stab_io(curoutstab)->page_len);
8d063cd8	132	break;
8d063cd8	133	case '-':
a687059c	134	str_numset(stab_val(stab),(double)stab_io(curoutstab)->lines_left);
8d063cd8	135	break;
8d063cd8	136	case '%':
a687059c	137	str_numset(stab_val(stab),(double)stab_io(curoutstab)->page);
8d063cd8	138	break;
a687059c	139	#endif
8d063cd8	140	case '/':
9f68db38	141	if (record_separator != 12345) {
	142	*tokenbuf = record_separator;
	143	tokenbuf[1] = '\0';
	144	str_nset(stab_val(stab),tokenbuf,rslen);
	145	}
8d063cd8	146	break;
8d063cd8	147	case '[':
a687059c	148	str_numset(stab_val(stab),(double)arybase);
8d063cd8	149	break;
8d063cd8	150	case '\|':
a687059c	151	str_numset(stab_val(stab),
a687059c	152	(double)((stab_io(curoutstab)->flags & IOF_FLUSH) != 0) );
8d063cd8	153	break;
8d063cd8	154	case ',':
a687059c	155	str_nset(stab_val(stab),ofs,ofslen);
8d063cd8	156	break;
8d063cd8	157	case '\\':
a687059c	158	str_nset(stab_val(stab),ors,orslen);
8d063cd8	159	break;
8d063cd8	160	case '#':
a687059c	161	str_set(stab_val(stab),ofmt);
8d063cd8	162	break;
8d063cd8	163	case '!':
a687059c	164	str_numset(stab_val(stab), (double)errno);
663a0e37	165	str_set(stab_val(stab), strerror(errno));
a687059c	166	stab_val(stab)->str_nok = 1; /* what a wonderful hack! */
378cc40b	167	break;
378cc40b	168	case '<':
a687059c	169	str_numset(stab_val(stab),(double)uid);
378cc40b	170	break;
378cc40b	171	case '>':
a687059c	172	str_numset(stab_val(stab),(double)euid);
378cc40b	173	break;
378cc40b	174	case '(':
a687059c	175	s = buf;
a687059c	176	(void)sprintf(s,"%d",(int)gid);
378cc40b	177	goto add_groups;
378cc40b	178	case ')':
a687059c	179	s = buf;
a687059c	180	(void)sprintf(s,"%d",(int)egid);
378cc40b	181	add_groups:
	182	while (*s) s++;
	183	#ifdef GETGROUPS
	184	#ifndef NGROUPS
	185	#define NGROUPS 32
	186	#endif
	187	{
	188	GIDTYPE gary[NGROUPS];
	189
	190	i = getgroups(NGROUPS,gary);
	191	while (--i >= 0) {
a687059c	192	(void)sprintf(s," %ld", (long)gary[i]);
378cc40b	193	while (*s) s++;
	194	}
	195	}
	196	#endif
a687059c	197	str_set(stab_val(stab),buf);
8d063cd8	198	break;
8d063cd8	199	}
a687059c	200	return stab_val(stab);
8d063cd8	201	}
8d063cd8	202
a687059c	203	stabset(mstr,str)
a687059c	204	register STR *mstr;
8d063cd8	205	STR *str;
8d063cd8	206	{
a687059c	207	STAB *stab = mstr->str_u.str_stab;
8d063cd8	208	char *s;
8d063cd8	209	int i;
663a0e37	210	static handlertype sighandler();
8d063cd8	211
a687059c	212	switch (mstr->str_rare) {
	213	case 'E':
	214	setenv(mstr->str_ptr,str_get(str));
	215	/* And you'll never guess what the dog had */
	216	break; /* in its mouth... */
	217	case 'S':
	218	s = str_get(str);
	219	i = whichsig(mstr->str_ptr); /* ...no, a brick */
	220	if (strEQ(s,"IGNORE"))
	221	#ifndef lint
	222	(void)signal(i,SIG_IGN);
	223	#else
	224	;
	225	#endif
	226	else if (strEQ(s,"DEFAULT") \|\| !*s)
	227	(void)signal(i,SIG_DFL);
	228	else
	229	(void)signal(i,sighandler);
	230	break;
	231	#ifdef SOME_DBM
	232	case 'D':
	233	hdbmstore(stab_hash(stab),mstr->str_ptr,mstr->str_cur,str);
	234	break;
	235	#endif
	236	case '#':
	237	afill(stab_array(stab), (int)str_gnum(str) - arybase);
	238	break;
	239	case 'X': /* merely a copy of a * string */
	240	break;
	241	case '*':
	242	s = str_get(str);
9f68db38	243	if (strNE(s,"StB") \|\| str->str_cur != sizeof(STBP)) {
a687059c	244	if (!*s) {
	245	STBP *stbp;
	246
	247	(void)savenostab(stab); /* schedule a free of this stab */
	248	if (stab->str_len)
	249	Safefree(stab->str_ptr);
	250	Newz(601,stbp, 1, STBP);
	251	stab->str_ptr = stbp;
	252	stab->str_len = stab->str_cur = sizeof(STBP);
	253	stab->str_pok = 1;
9f68db38	254	strcpy(stab_magic(stab),"StB");
a687059c	255	stab_val(stab) = Str_new(70,0);
	256	stab_line(stab) = line;
	257	}
	258	else
	259	stab = stabent(s,TRUE);
	260	str_sset(str,stab);
	261	}
	262	break;
	263	case 's': {
	264	struct lstring lstr = (struct lstring)str;
	265
	266	mstr->str_rare = 0;
	267	str->str_magic = Nullstr;
	268	str_insert(mstr,lstr->lstr_offset,lstr->lstr_len,
	269	str->str_ptr,str->str_cur);
	270	}
	271	break;
	272
	273	case 'v':
	274	do_vecset(mstr,str);
	275	break;
	276
	277	case 0:
	278	switch (*stab->str_magic->str_ptr) {
9f68db38	279	case '.':
	280	if (localizing)
	281	savesptr((STR**)&last_in_stab);
	282	break;
8d063cd8	283	case '^':
a687059c	284	Safefree(stab_io(curoutstab)->top_name);
	285	stab_io(curoutstab)->top_name = s = savestr(str_get(str));
	286	stab_io(curoutstab)->top_stab = stabent(s,TRUE);
8d063cd8	287	break;
8d063cd8	288	case '~':
a687059c	289	Safefree(stab_io(curoutstab)->fmt_name);
	290	stab_io(curoutstab)->fmt_name = s = savestr(str_get(str));
	291	stab_io(curoutstab)->fmt_stab = stabent(s,TRUE);
8d063cd8	292	break;
8d063cd8	293	case '=':
a687059c	294	stab_io(curoutstab)->page_len = (long)str_gnum(str);
8d063cd8	295	break;
8d063cd8	296	case '-':
a687059c	297	stab_io(curoutstab)->lines_left = (long)str_gnum(str);
	298	if (stab_io(curoutstab)->lines_left < 0L)
	299	stab_io(curoutstab)->lines_left = 0L;
8d063cd8	300	break;
8d063cd8	301	case '%':
a687059c	302	stab_io(curoutstab)->page = (long)str_gnum(str);
8d063cd8	303	break;
8d063cd8	304	case '\|':
a687059c	305	stab_io(curoutstab)->flags &= ~IOF_FLUSH;
8d063cd8	306	if (str_gnum(str) != 0.0) {
a687059c	307	stab_io(curoutstab)->flags \|= IOF_FLUSH;
8d063cd8	308	}
	309	break;
	310	case '*':
a687059c	311	i = (int)str_gnum(str);
a687059c	312	multiline = (i != 0);
8d063cd8	313	break;
8d063cd8	314	case '/':
79a0689e	315	if (str->str_pok) {
9f68db38	316	record_separator = *str_get(str);
	317	rslen = str->str_cur;
	318	}
	319	else {
	320	record_separator = 12345; /* fake a non-existent char */
	321	rslen = 1;
	322	}
8d063cd8	323	break;
	324	case '\\':
	325	if (ors)
a687059c	326	Safefree(ors);
8d063cd8	327	ors = savestr(str_get(str));
a687059c	328	orslen = str->str_cur;
8d063cd8	329	break;
	330	case ',':
	331	if (ofs)
a687059c	332	Safefree(ofs);
8d063cd8	333	ofs = savestr(str_get(str));
a687059c	334	ofslen = str->str_cur;
8d063cd8	335	break;
	336	case '#':
	337	if (ofmt)
a687059c	338	Safefree(ofmt);
8d063cd8	339	ofmt = savestr(str_get(str));
	340	break;
	341	case '[':
	342	arybase = (int)str_gnum(str);
	343	break;
378cc40b	344	case '?':
	345	statusvalue = (unsigned short)str_gnum(str);
	346	break;
8d063cd8	347	case '!':
	348	errno = (int)str_gnum(str); /* will anyone ever use this? */
	349	break;
378cc40b	350	case '<':
378cc40b	351	uid = (int)str_gnum(str);
a687059c	352	#ifdef SETREUID
	353	if (delaymagic) {
	354	delaymagic \|= DM_REUID;
	355	break; /* don't do magic till later */
	356	}
	357	#endif /* SETREUID */
	358	#ifdef SETRUID
	359	if (setruid((UIDTYPE)uid) < 0)
	360	uid = (int)getuid();
	361	#else
	362	#ifdef SETREUID
	363	if (setreuid((UIDTYPE)uid, (UIDTYPE)-1) < 0)
378cc40b	364	uid = (int)getuid();
	365	#else
	366	fatal("setruid() not implemented");
	367	#endif
a687059c	368	#endif
378cc40b	369	break;
378cc40b	370	case '>':
378cc40b	371	euid = (int)str_gnum(str);
a687059c	372	#ifdef SETREUID
	373	if (delaymagic) {
	374	delaymagic \|= DM_REUID;
	375	break; /* don't do magic till later */
	376	}
	377	#endif /* SETREUID */
	378	#ifdef SETEUID
	379	if (seteuid((UIDTYPE)euid) < 0)
	380	euid = (int)geteuid();
	381	#else
	382	#ifdef SETREUID
	383	if (setreuid((UIDTYPE)-1, (UIDTYPE)euid) < 0)
378cc40b	384	euid = (int)geteuid();
	385	#else
	386	fatal("seteuid() not implemented");
	387	#endif
a687059c	388	#endif
378cc40b	389	break;
378cc40b	390	case '(':
a687059c	391	gid = (int)str_gnum(str);
	392	#ifdef SETREGID
	393	if (delaymagic) {
	394	delaymagic \|= DM_REGID;
	395	break; /* don't do magic till later */
	396	}
	397	#endif /* SETREGID */
378cc40b	398	#ifdef SETRGID
a687059c	399	(void)setrgid((GIDTYPE)gid);
	400	#else
	401	#ifdef SETREGID
	402	(void)setregid((GIDTYPE)gid, (GIDTYPE)-1);
378cc40b	403	#else
	404	fatal("setrgid() not implemented");
	405	#endif
a687059c	406	#endif
378cc40b	407	break;
378cc40b	408	case ')':
a687059c	409	egid = (int)str_gnum(str);
	410	#ifdef SETREGID
	411	if (delaymagic) {
	412	delaymagic \|= DM_REGID;
	413	break; /* don't do magic till later */
	414	}
	415	#endif /* SETREGID */
378cc40b	416	#ifdef SETEGID
a687059c	417	(void)setegid((GIDTYPE)egid);
	418	#else
	419	#ifdef SETREGID
	420	(void)setregid((GIDTYPE)-1, (GIDTYPE)egid);
378cc40b	421	#else
	422	fatal("setegid() not implemented");
	423	#endif
a687059c	424	#endif
	425	break;
	426	case ':':
	427	chopset = str_get(str);
378cc40b	428	break;
8d063cd8	429	}
a687059c	430	break;
378cc40b	431	}
8d063cd8	432	}
8d063cd8	433
378cc40b	434	whichsig(sig)
378cc40b	435	char *sig;
8d063cd8	436	{
	437	register char **sigv;
	438
	439	for (sigv = sig_name+1; *sigv; sigv++)
378cc40b	440	if (strEQ(sig,*sigv))
8d063cd8	441	return sigv - sig_name;
a687059c	442	#ifdef SIGCLD
	443	if (strEQ(sig,"CHLD"))
	444	return SIGCLD;
	445	#endif
	446	#ifdef SIGCHLD
	447	if (strEQ(sig,"CLD"))
	448	return SIGCHLD;
	449	#endif
8d063cd8	450	return 0;
	451	}
	452
663a0e37	453	static handlertype
8d063cd8	454	sighandler(sig)
	455	int sig;
	456	{
	457	STAB *stab;
	458	ARRAY *savearray;
	459	STR *str;
378cc40b	460	char *oldfile = filename;
378cc40b	461	int oldsave = savestack->ary_fill;
a687059c	462	ARRAY *oldstack = stack;
378cc40b	463	SUBR *sub;
8d063cd8	464
a687059c	465	stab = stabent(
	466	str_get(hfetch(stab_hash(sigstab),sig_name[sig],strlen(sig_name[sig]),
	467	TRUE)), TRUE);
	468	sub = stab_sub(stab);
	469	if (!sub && *sig_name[sig] == 'C' && instr(sig_name[sig],"LD")) {
	470	if (sig_name[sig][1] == 'H')
	471	stab = stabent(str_get(hfetch(stab_hash(sigstab),"CLD",3,TRUE)),
	472	TRUE);
	473	else
	474	stab = stabent(str_get(hfetch(stab_hash(sigstab),"CHLD",4,TRUE)),
	475	TRUE);
	476	sub = stab_sub(stab); /* gag */
	477	}
378cc40b	478	if (!sub) {
	479	if (dowarn)
	480	warn("SIG%s handler \"%s\" not defined.\n",
a687059c	481	sig_name[sig], stab_name(stab) );
378cc40b	482	return;
378cc40b	483	}
a687059c	484	savearray = stab_xarray(defstab);
	485	stab_xarray(defstab) = stack = anew(defstab);
	486	stack->ary_flags = 0;
	487	str = Str_new(71,0);
8d063cd8	488	str_set(str,sig_name[sig]);
a687059c	489	(void)apush(stab_xarray(defstab),str);
378cc40b	490	sub->depth++;
	491	if (sub->depth >= 2) { /* save temporaries on recursion? */
	492	if (sub->depth == 100 && dowarn)
a687059c	493	warn("Deep recursion on subroutine \"%s\"",stab_name(stab));
378cc40b	494	savelist(sub->tosave->ary_array,sub->tosave->ary_fill);
	495	}
	496	filename = sub->filename;
	497
a687059c	498	(void)cmd_exec(sub->cmd,G_SCALAR,1); /* so do it already */
378cc40b	499
378cc40b	500	sub->depth--; /* assuming no longjumps out of here */
a687059c	501	str_free(stack->ary_array[0]); /* free the one real string */
	502	afree(stab_xarray(defstab)); /* put back old $_[] */
	503	stab_xarray(defstab) = savearray;
	504	stack = oldstack;
378cc40b	505	filename = oldfile;
	506	if (savestack->ary_fill > oldsave)
	507	restorelist(oldsave);
8d063cd8	508	}
8d063cd8	509
8d063cd8	510	STAB *
	511	aadd(stab)
	512	register STAB *stab;
	513	{
a687059c	514	if (!stab_xarray(stab))
a687059c	515	stab_xarray(stab) = anew(stab);
8d063cd8	516	return stab;
	517	}
	518
	519	STAB *
	520	hadd(stab)
	521	register STAB *stab;
	522	{
a687059c	523	if (!stab_xhash(stab))
a687059c	524	stab_xhash(stab) = hnew(COEFFSIZE);
8d063cd8	525	return stab;
8d063cd8	526	}
378cc40b	527
	528	STAB *
	529	stabent(name,add)
	530	register char *name;
	531	int add;
	532	{
	533	register STAB *stab;
a687059c	534	register STBP *stbp;
	535	int len;
	536	register char *namend;
	537	HASH *stash;
	538	char *sawquote = Nullch;
	539	char *prevquote = Nullch;
	540	bool global = FALSE;
378cc40b	541
a687059c	542	if (isascii(name) && isupper(name)) {
	543	if (*name > 'I') {
	544	if (*name == 'S' && (
	545	strEQ(name, "SIG") \|\|
	546	strEQ(name, "STDIN") \|\|
	547	strEQ(name, "STDOUT") \|\|
	548	strEQ(name, "STDERR") ))
	549	global = TRUE;
378cc40b	550	}
a687059c	551	else if (*name > 'E') {
	552	if (*name == 'I' && strEQ(name, "INC"))
	553	global = TRUE;
	554	}
	555	else if (*name >= 'A') {
	556	if (*name == 'E' && strEQ(name, "ENV"))
	557	global = TRUE;
	558	}
	559	else if (*name == 'A' && (
	560	strEQ(name, "ARGV") \|\|
	561	strEQ(name, "ARGVOUT") ))
	562	global = TRUE;
	563	}
	564	for (namend = name; *namend; namend++) {
	565	if (*namend == '\'' && namend[1])
	566	prevquote = sawquote, sawquote = namend;
	567	}
	568	if (sawquote == name && name[1]) {
	569	stash = defstash;
	570	sawquote = Nullch;
	571	name++;
	572	}
	573	else if (!isalpha(*name) \|\| global)
	574	stash = defstash;
	575	else
	576	stash = curstash;
	577	if (sawquote) {
	578	char tmpbuf[256];
	579	char s, d;
	580
	581	*sawquote = '\0';
	582	if (s = prevquote) {
	583	strncpy(tmpbuf,name,s-name+1);
	584	d = tmpbuf+(s-name+1);
	585	*d++ = '_';
	586	strcpy(d,s+1);
	587	}
	588	else {
	589	*tmpbuf = '_';
	590	strcpy(tmpbuf+1,name);
	591	}
	592	stab = stabent(tmpbuf,TRUE);
	593	if (!(stash = stab_xhash(stab)))
	594	stash = stab_xhash(stab) = hnew(0);
	595	name = sawquote+1;
	596	*sawquote = '\'';
378cc40b	597	}
a687059c	598	len = namend - name;
	599	stab = (STAB*)hfetch(stash,name,len,add);
	600	if (!stab)
	601	return Nullstab;
	602	if (stab->str_pok) {
	603	stab->str_pok \|= SP_MULTI;
	604	return stab;
	605	}
	606	else {
	607	if (stab->str_len)
	608	Safefree(stab->str_ptr);
	609	Newz(602,stbp, 1, STBP);
	610	stab->str_ptr = stbp;
	611	stab->str_len = stab->str_cur = sizeof(STBP);
	612	stab->str_pok = 1;
9f68db38	613	strcpy(stab_magic(stab),"StB");
a687059c	614	stab_val(stab) = Str_new(72,0);
	615	stab_line(stab) = line;
	616	str_magic(stab,stab,'*',name,len);
378cc40b	617	return stab;
378cc40b	618	}
378cc40b	619	}
	620
	621	STIO *
	622	stio_new()
	623	{
a687059c	624	STIO *stio;
378cc40b	625
a687059c	626	Newz(603,stio,1,STIO);
378cc40b	627	stio->page_len = 60;
	628	return stio;
	629	}
	630
	631	stab_check(min,max)
	632	int min;
	633	register int max;
	634	{
a687059c	635	register HENT *entry;
378cc40b	636	register int i;
	637	register STAB *stab;
	638
	639	for (i = min; i <= max; i++) {
a687059c	640	for (entry = defstash->tbl_array[i]; entry; entry = entry->hent_next) {
	641	stab = (STAB*)entry->hent_val;
	642	if (stab->str_pok & SP_MULTI)
378cc40b	643	continue;
a687059c	644	line = stab_line(stab);
a687059c	645	warn("Possible typo: \"%s\"", stab_name(stab));
378cc40b	646	}
	647	}
	648	}
a687059c	649
	650	static int gensym = 0;
	651
	652	STAB *
	653	genstab()
	654	{
	655	(void)sprintf(tokenbuf,"_GEN_%d",gensym++);
	656	return stabent(tokenbuf,TRUE);
	657	}
	658
	659	/* hopefully this is only called on local symbol table entries */
	660
	661	void
	662	stab_clear(stab)
	663	register STAB *stab;
	664	{
	665	STIO *stio;
	666	SUBR *sub;
	667
	668	afree(stab_xarray(stab));
	669	(void)hfree(stab_xhash(stab));
	670	str_free(stab_val(stab));
	671	if (stio = stab_io(stab)) {
	672	do_close(stab,FALSE);
	673	Safefree(stio->top_name);
	674	Safefree(stio->fmt_name);
	675	}
	676	if (sub = stab_sub(stab)) {
	677	afree(sub->tosave);
	678	cmd_free(sub->cmd);
	679	}
	680	Safefree(stab->str_ptr);
	681	stab->str_ptr = Null(STBP*);
	682	stab->str_len = 0;
	683	stab->str_cur = 0;
	684	}
	685
9f68db38	686	#if defined(CRIPPLED_CC) && (defined(iAPX286) \|\| defined(M_I286) \|\| defined(I80286))
	687	#define MICROPORT
	688	#endif
	689
	690	#ifdef MICROPORT /* Microport 2.4 hack */
	691	ARRAY *stab_array(stab)
	692	register STAB *stab;
	693	{
	694	if (((STBP*)(stab->str_ptr))->stbp_array)
	695	return ((STBP*)(stab->str_ptr))->stbp_array;
	696	else
	697	return ((STBP*)(aadd(stab)->str_ptr))->stbp_array;
	698	}
	699
	700	HASH *stab_hash(stab)
	701	register STAB *stab;
	702	{
	703	if (((STBP*)(stab->str_ptr))->stbp_hash)
	704	return ((STBP*)(stab->str_ptr))->stbp_hash;
	705	else
	706	return ((STBP*)(hadd(stab)->str_ptr))->stbp_hash;
	707	}
	708	#endif /* Microport 2.4 hack */