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

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