/* static	char *sccsid = "@(#)files.c	4.16.1 (2.11BSD) 1/3/94"; */
#include <sys/param.h>
#include <fcntl.h>

/* UNIX DEPENDENT PROCEDURES */

/* DEFAULT RULES FOR UNIX */

char *builtin[] =
	{
#ifdef pwb
	".SUFFIXES : .L .out .a .o .c .f .e .r .y .yr .ye .l .s .z .x .t .h .cl",
#else
	".SUFFIXES : .out .a .o .c .F .f .e .r .y .yr .ye .l .s .cl .p",
#endif
	"YACC=yacc",
	"YACCR=yacc -r",
	"YACCE=yacc -e",
	"YFLAGS=",
	"LEX=lex",
	"LFLAGS=",
	"CC=cc",
#if defined(vax) || defined(sun) || defined(tahoe)
	"AS=as",
#else
	"AS=as -",
#endif
	"PC=pc",
	"PFLAGS=",
	"CFLAGS=",
	"RC=f77",
	"RFLAGS=",
	"FC=f77",
	"EFLAGS=",
	"FFLAGS=",
	"LOADLIBES=",
#ifdef pwb
	"SCOMP=scomp",
	"SCFLAGS=",
	"CMDICT=cmdict",
	"CMFLAGS=",
#endif

	".c.a :",
	"\t$(CC) $(CFLAGS) -c $<",
	"\tar r $@ $*.o",
	"\trm -f $*.o",

	".c.o :",
	"\t$(CC) $(CFLAGS) -c $<",

	".p.o :",
	"\t$(PC) $(PFLAGS) -c $<",

	".cl.o :",
	"\tclass -c $<",

	".e.o .r.o .F.o .f.o :",
	"\t$(FC) $(RFLAGS) $(EFLAGS) $(FFLAGS) -c $<",

	".s.o :",
	"\t$(AS) -o $@ $<",

	".y.o :",
	"\t$(YACC) $(YFLAGS) $<",
	"\t$(CC) $(CFLAGS) -c y.tab.c",
	"\trm y.tab.c",
	"\tmv y.tab.o $@",

	".yr.o:",
	"\t$(YACCR) $(YFLAGS) $<",
	"\t$(RC) $(RFLAGS) -c y.tab.r",
	"\trm y.tab.r",
	"\tmv y.tab.o $@",

	".ye.o :",
	"\t$(YACCE) $(YFLAGS) $<",
	"\t$(EC) $(RFLAGS) -c y.tab.e",
	"\trm y.tab.e",
	"\tmv y.tab.o $@",

	".l.o :",
	"\t$(LEX) $(LFLAGS) $<",
	"\t$(CC) $(CFLAGS) -c lex.yy.c",
	"\trm lex.yy.c",
	"\tmv lex.yy.o $@",

	".y.c :",
	"\t$(YACC) $(YFLAGS) $<",
	"\tmv y.tab.c $@",

	".l.c :",
	"\t$(LEX) $(LFLAGS) $<",
	"\tmv lex.yy.c $@",

	".yr.r:",
	"\t$(YACCR) $(YFLAGS) $<",
	"\tmv y.tab.r $@",

	".ye.e :",
	"\t$(YACCE) $(YFLAGS) $<",
	"\tmv y.tab.e $@",

#ifdef pwb
	".o.L .c.L .t.L:",
	"\t$(SCOMP) $(SCFLAGS) $<",

	".t.o:",
	"\t$(SCOMP) $(SCFLAGS) -c $<",

	".t.c:",
	"\t$(SCOMP) $(SCFLAGS) -t $<",

	".h.z .t.z:",
	"\t$(CMDICT) $(CMFLAGS) $<",

	".h.x .t.x:",
	"\t$(CMDICT) $(CMFLAGS) -c $<",
#endif

	".s.out .c.out .o.out :",
	"\t$(CC) $(CFLAGS) $< $(LOADLIBES) -o $@",

	".f.out .F.out .r.out .e.out :",
	"\t$(FC) $(EFLAGS) $(RFLAGS) $(FFLAGS) $< $(LOADLIBES) -o $@",
	"\t-rm $*.o",

	".y.out :",
	"\t$(YACC) $(YFLAGS) $<",
	"\t$(CC) $(CFLAGS) y.tab.c $(LOADLIBES) -ly -o $@",
	"\trm y.tab.c",

	".l.out :",
	"\t$(LEX) $(LFLAGS) $<",
	"\t$(CC) $(CFLAGS) lex.yy.c $(LOADLIBES) -ll -o $@",
	"\trm lex.yy.c",

	0 };

#include "defs"
#include <sys/stat.h>



TIMETYPE 
exists(pname)
struct nameblock *pname;
{
struct stat buf;
register char *s, *filename;
TIMETYPE lookarch();
extern char *findfl();

filename = pname->namep;

for(s = filename ; *s!='\0' && *s!='(' ; ++s)
	;

if(*s == '(')
	return(lookarch(filename));

if (stat(filename, &buf) < 0)
{
	s = findfl(filename);
	if(s != (char *)-1)
	{
		pname->alias = copys(s);
		if(stat(pname->alias, &buf) == 0)
			return(buf.st_mtime);
	}
	return(0);
}
else	return(buf.st_mtime);
}


TIMETYPE prestime()
{
TIMETYPE t;
time(&t);
return(t);
}



FSTATIC char nbuf[MAXNAMLEN + 1];
FSTATIC char *nbufend	= &nbuf[MAXNAMLEN];



struct depblock *srchdir(pat, mkchain, nextdbl)
register char *pat; /* pattern to be matched in directory */
int mkchain;  /* nonzero if results to be remembered */
struct depblock *nextdbl;  /* final value for chain */
{
register DIR *dirf;
int cldir;
char *dirname, *dirpref, *endir, *filepat, *p, temp[MAXPATHLEN];
char fullname[MAXPATHLEN], *p1, *p2;
struct nameblock *q;
struct depblock *thisdbl;
struct dirhdr *od;
struct pattern *patp;
struct varblock *cp, *varptr();
char *path, pth[MAXPATHLEN], *strcpy();
struct direct *dptr;


thisdbl = 0;

if(mkchain == NO)
	for(patp=firstpat ; patp ; patp = patp->nxtpattern)
		if(! unequal(pat, patp->patval)) return(0);

patp = ALLOC(pattern);
patp->nxtpattern = firstpat;
firstpat = patp;
patp->patval = copys(pat);

endir = 0;

for(p=pat; *p!='\0'; ++p)
	if(*p=='/') endir = p;

if(endir==0)
	{
	dirpref = "";
	filepat = pat;
	cp = varptr("VPATH");
	if (cp->varval == NULL) path = ".";
	else {
	       path = pth; 
	       *path = '\0';
		/*
		 * expand VPATH; this is almost surely not the place to do
		 * this, but I have no intention whatsoever of attempting
		 * to understand this code.
		 */
	       if (strncmp(cp->varval, ".:", 2) != 0) {
			strcpy(pth,".:");
			subst(cp->varval, pth + 2);
		}
		else
			subst(cp->varval, pth);
	       }
	}
else	{
	*endir = '\0';
	path = strcpy(pth, pat);
	dirpref = concat(pat, "/", temp);
	filepat = endir+1;
	}

while (*path) {			/* Loop thru each VPATH directory */
  dirname = path;
  for (; *path; path++)
    if (*path == ':') {
      *path++ = '\0';
      break;
      }

dirf = NULL;
cldir = NO;

for(od = firstod; od; od = od->nxtopendir)
	if(! unequal(dirname, od->dirn) )
		{
		dirf = od->dirfc;
		if (dirf != NULL)
			rewinddir(dirf); /* start over at the beginning  */
		break;
		}

if(dirf == NULL)
	{
	dirf = opendir(dirname);
	if(nopdir >= MAXDIR)
		cldir = YES;
	else	{
		++nopdir;
		od = ALLOC(dirhdr);
		od->nxtopendir = firstod;
		firstod = od;
		od->dirfc = dirf;
		od->dirn = copys(dirname);
		fcntl(dirf->dd_fd, F_SETFD, 1);
		}
	}

if(dirf == NULL)
	{
	fprintf(stderr, "Directory %s: ", dirname);
	fatal("Cannot open");
	}

else for (dptr = readdir(dirf); dptr != NULL; dptr = readdir(dirf))
	{
	p1 = dptr->d_name;
	p2 = nbuf;
	while( (p2<nbufend) && (*p2++ = *p1++)!='\0' )
		/* void */;
	if( amatch(nbuf,filepat) )
		{
		concat(dirpref,nbuf,fullname);
		if( (q=srchname(fullname)) ==0)
			q = makename(copys(fullname));
		if(mkchain)
			{
			thisdbl = ALLOC(depblock);
			thisdbl->nxtdepblock = nextdbl;
			thisdbl->depname = q;
			nextdbl = thisdbl;
			}
		}
	}

if(endir != 0)  *endir = '/';

if(cldir) {
	closedir(dirf);
	dirf = NULL;
}
} /* End of VPATH loop */
return(thisdbl);
}

/* stolen from glob through find */

static amatch(s, p)
char *s, *p;
{
	register int cc, scc, k;
	int c, lc;

	scc = *s;
	lc = 077777;
	switch (c = *p) {

	case '[':
		k = 0;
		while (cc = *++p) {
			switch (cc) {

			case ']':
				if (k)
					return(amatch(++s, ++p));
				else
					return(0);

			case '-':
				k |= (lc <= scc)  & (scc <= (cc=p[1]) ) ;
			}
			if (scc==(lc=cc)) k++;
		}
		return(0);

	case '?':
	caseq:
		if(scc) return(amatch(++s, ++p));
		return(0);
	case '*':
		return(umatch(s, ++p));
	case 0:
		return(!scc);
	}
	if (c==scc) goto caseq;
	return(0);
}

static umatch(s, p)
char *s, *p;
{
	if(*p==0) return(1);
	while(*s)
		if (amatch(s++,p)) return(1);
	return(0);
}

#ifdef METERFILE
#include <pwd.h>
int meteron	= 0;	/* default: metering off */

meter(file)
char *file;
{
TIMETYPE tvec;
char *p, *ctime();
FILE * mout;
struct passwd *pwd, *getpwuid();

if(file==0 || meteron==0) return;

pwd = getpwuid(getuid());

time(&tvec);

if( (mout=fopen(file,"a")) != NULL )
	{
	p = ctime(&tvec);
	p[16] = '\0';
	fprintf(mout,"User %s, %s\n",pwd->pw_name,p+4);
	fclose(mout);
	}
}
#endif


/* look inside archive for notation a(b)
	a(b)	is file member   b   in archive a
*/

#include <ar.h>
#include "archive.h"	/* from 'ar's directory */

	char arfile[MAXPATHLEN];
	CHDR	chdr;
	char *arfname = chdr.name;
	FILE *arfd;
	off_t arpos;

TIMETYPE lookarch(filename)
	char *filename;
	{
	char *p, *q, *send, s[MAXNAMLEN + 1];

	for	(p = filename; *p!= '(' ; ++p)
		;
	*p = '\0';
	strcpy(arfile, filename);
	openarch(filename);
	*p++ = '(';

	send = s + sizeof(s);

	for( q = s; q < send && *p!='\0' && *p!=')' ; *q++ = *p++)
		;
	*q++ = '\0';
	while	(getarch())
		{
		if	(!strcmp(arfname, s))
			{
			clarch();
			return(chdr.date);
			}
		arpos += (chdr.size + (chdr.size + chdr.lname & 1));
		arpos += sizeof (struct ar_hdr);
		}
	strcpy(chdr.name, s);
	clarch();
	return(0L);
	}


clarch()
{
if (arfd)
	fclose( arfd );
}


openarch(f)
register char *f;
	{
	char	magic[SARMAG];

	arfd = fopen(f, "r");
	if	(arfd == NULL)
		return;

	fseek(arfd, 0L, 0);
	fread(magic, SARMAG, 1, arfd);
	arpos = SARMAG;
	if	(strncmp(magic, ARMAG, SARMAG))
		fatal1("%s is not an archive", f);
	}

/*
 * "borrowed" from 'ld' because we didn't want to drag in everything
 * from 'ar'.  The error checking was also ripped out, basically if any
 * of the criteria for being an archive are not met then a -1 is returned
 * and the rest of 'make' figures out what to do (bails out).
*/

typedef struct ar_hdr HDR;
extern	long	strtol();

/* Convert ar header field to an integer. */
#define	AR_ATOI(from, to, len, base) { \
	bcopy(from, buf, len); \
	buf[len] = '\0'; \
	to = strtol(buf, (char **)NULL, base); \
}

getarch()
{
	char hb[sizeof(HDR) + 1];	/* real header */
	struct ar_hdr arhead;
	register HDR *hdr;
	register int len;
	int	nr;
	register char *p;
	char buf[20];

	if (!arfd)
		return(0);
	fseek(arfd, arpos, 0);

	nr = fread(hb, 1, sizeof(HDR), arfd);
	if (nr != sizeof(HDR))
		return(0);

	hdr = (HDR *)hb;
	if (strncmp(hdr->ar_fmag, ARFMAG, sizeof(ARFMAG) - 1))
		return(0);

	/* Convert the header into the internal format. */
#define	DECIMAL	10
#define	OCTAL	 8

	AR_ATOI(hdr->ar_date, chdr.date, sizeof(hdr->ar_date), DECIMAL);
	AR_ATOI(hdr->ar_uid, chdr.uid, sizeof(hdr->ar_uid), DECIMAL);
	AR_ATOI(hdr->ar_gid, chdr.gid, sizeof(hdr->ar_gid), DECIMAL);
	AR_ATOI(hdr->ar_mode, chdr.mode, sizeof(hdr->ar_mode), OCTAL);
	AR_ATOI(hdr->ar_size, chdr.size, sizeof(hdr->ar_size), DECIMAL);

	/* Leading spaces should never happen. */
	if (hdr->ar_name[0] == ' ')
		return(-1);

	/*
	 * Long name support.  Set the "real" size of the file, and the
	 * long name flag/size.
	 */
	if (!bcmp(hdr->ar_name, AR_EFMT1, sizeof(AR_EFMT1) - 1)) {
		chdr.lname = len = atoi(hdr->ar_name + sizeof(AR_EFMT1) - 1);
		if (len <= 0 || len > MAXNAMLEN)
			return(-1);
		nr = fread(chdr.name, 1, (size_t)len, arfd);
		if (nr != len)
			return(0);
		chdr.name[len] = 0;
		chdr.size -= len;
	} else {
		chdr.lname = 0;
		bcopy(hdr->ar_name, chdr.name, sizeof(hdr->ar_name));

		/* Strip trailing spaces, null terminate. */
		for (p = chdr.name + sizeof(hdr->ar_name) - 1; *p == ' '; --p);
		*++p = '\0';
	}
	return(1);
}

/*
 *	findfl(name)	(like execvp, but does path search and finds files)
 */
static char fname[128];

char *execat();

char *findfl(name)
register char *name;
{
	register char *p;
	struct varblock *cp, *varptr();
	struct stat buf;

	for (p = name; *p; p++) 
		if(*p == '/') return(name);

	cp = varptr("VPATH");
	if(cp->varval == NULL || *cp->varval == 0)
		p = ":";
	else
		p = cp->varval;

	do
	{
		p = execat(p, name, fname);
		if(stat(fname,&buf) >= 0)
			return(fname);
	} while (p);
	return((char *)-1);
}

char *execat(s1, s2, si)
register char *s1, *s2;
char *si;
{
	register char *s;

	s = si;
	while (*s1 && *s1 != ':' && *s1 != '-')
		*s++ = *s1++;
	if (si != s)
		*s++ = '/';
	while (*s2)
		*s++ = *s2++;
	*s = '\0';
	return(*s1? ++s1: 0);
}


/* copy s to d, changing file names to file aliases */
fixname(s, d)
char *s, *d;
{
	register char *r, *q;
	struct nameblock *pn;
	char name[MAXPATHLEN];

	while (*s) {
		if (isspace(*s)) *d++ = *s++;
		else {
			r = name;
			while (*s) {
				if (isspace(*s)) break; 
				*r++ = *s++;
				}
			*r = '\0';
 		
			if (((pn = srchname(name)) != 0) && (pn->alias))
				q = pn->alias;
			else q = name;
	
			while (*q) *d++ = *q++;
			}
		}
	*d = '\0';
}