4.1cBSD/usr/src/etc/arff.c
static char *sccsid = "@(#)arff.c 4.11 (Berkeley) 82/06/27";
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <signal.h>
#include <stdio.h>
#define dbprintf printf
struct rt_dat {
u_short rt_yr:5; /* year-1972 */
u_short rt_dy:5; /* day */
u_short rt_mo:5; /* month */
};
struct rt_axent {
char rt_sent[14];
};
struct rt_ent {
char rt_pad; /* unusued */
char rt_stat; /* type of entry, or end of seg */
u_short rt_name[3]; /* name, 3 words in rad50 form */
u_short rt_len; /* length of file */
char rt_chan; /* only used in temporary files */
char rt_job; /* only used in temporary files */
struct rt_dat rt_date; /* creation date */
};
#define RT_TEMP 1
#define RT_NULL 2
#define RT_FILE 4
#define RT_ESEG 8
#define RT_BLOCK 512 /* block size */
#define RT_DIRSIZE 31 /* max # of directory segments */
struct rt_head {
short rt_numseg; /* # of segments available */
short rt_nxtseg; /* # of next logical segment */
short rt_lstseg; /* highest seg currently open */
u_short rt_entpad; /* extra words/directory entry */
short rt_stfile; /* block # where files begin */
};
struct rt_dir {
struct rt_head rt_axhead;
struct rt_ent rt_ents[72];
char _dirpad[6];
};
extern struct rt_dir rt_dir[RT_DIRSIZE];
extern int rt_entsiz;
extern int floppydes;
extern char *rt_last;
typedef struct fldope {
int startad;
int count;
struct rt_ent *rtdope;
} FLDOPE;
FLDOPE *lookup();
#define rt(p) ((struct rt_ent *) p )
#define Ain1 03100
#define Ain2 050
#define flag(c) (flg[('c') - 'a'])
char *man = "rxtd";
char zeroes[512];
extern char *val;
extern char table[256];
struct rt_dir rt_dir[RT_DIRSIZE] = {
{4, 0, 1, 0, 14},
{ {0, RT_NULL, {0, 0, 0}, 494, 0}, {0, RT_ESEG} }
};
int rt_entsiz;
int rt_nleft;
struct rt_ent *rt_curend[RT_DIRSIZE];
int floppydes;
int dirdirty;
char *rt_last;
char *defdev = "/dev/floppy";
char *opt = "vf";
int signum[] = {SIGHUP, SIGINT, SIGQUIT, 0};
extern long lseek();
int rcmd(), dcmd(), xcmd(), tcmd();
int (*comfun)();
char flg[26];
char **namv;
int namc;
int file;
main(argc, argv)
char *argv[];
{
register char *cp;
if (argc < 2)
usage();
cp = argv[1];
for (cp = argv[1]; *cp; cp++)
switch (*cp) {
case 'm':
case 'v':
case 'u':
case 'w':
flg[*cp-'a']++;
continue;
case 'c':
{
#define SURE "Last chance before clobbering floppy?"
int tty;
char response[128];
tty = open("/dev/tty", 2);
write(tty, SURE, sizeof(SURE));
read(tty, response, sizeof(response));
if (*response != 'y')
exit(50);
flag(c)++;
close(tty);
}
dirdirty++;
continue;
case 'r':
setcom(rcmd);
flag(r)++;
continue;
case 'd':
setcom(dcmd);
flag(d)++;
continue;
case 'x':
setcom(xcmd);
continue;
case 't':
setcom(tcmd);
continue;
case 'f':
defdev = argv[2];
argv++;
argc--;
continue;
default:
fprintf(stderr, "arff: bad option `%c'\n", *cp);
exit(1);
}
namv = argv+2;
namc = argc-2;
if (comfun == 0) {
if (flag(u) == 0) {
fprintf(stderr, "arff: one of [%s] must be specified\n",
man);
exit(1);
}
setcom(rcmd);
}
(*comfun)();
exit(notfound());
}
setcom(fun)
int (*fun)();
{
if (comfun != 0) {
fprintf(stderr, "arff: only one of [%s] allowed\n", man);
exit(1);
}
comfun = fun;
}
usage()
{
fprintf(stderr, "usage: ar [%s][%s] archive files ...\n", opt, man);
exit(1);
}
notfound()
{
register i, n = 0;
for (i = 0; i < namc; i++)
if (namv[i]) {
fprintf(stderr, "arff: %s not found\n", namv[i]);
n++;
}
return(n);
}
mesg(c)
{
if (flag(v))
if (c != 'c' || flag(v) > 1)
printf("%c - %s\n", c, file);
}
tcmd()
{
register char *de, *last;
FLDOPE *lookup(), *dope;
int segnum, nleft;
register i;
register struct rt_ent *rde;
rt_init();
if (namc == 0)
for (segnum = 0; segnum != -1;
segnum = rt_dir[segnum].rt_axhead.rt_nxtseg - 1)
{
last = rt_last + segnum*2*RT_BLOCK;
for (de = ((char *)&rt_dir[segnum])+10; de <= last;
de += rt_entsiz)
if (rtls(rt(de))) {
nleft = (last-de)/rt_entsiz;
#define ENTRIES "\n%d entries remaining in directory segment %d.\n"
printf(ENTRIES, nleft, segnum+1);
break;
}
}
else
for (i = 0; i < namc; i++)
if (dope = lookup(namv[i])) {
rde = dope->rtdope;
rtls(rde);
namv[i] = 0;
}
}
rtls(de)
register struct rt_ent *de;
{
int month, day, year;
char name[12], ext[4];
switch (de->rt_stat) {
case RT_TEMP:
if (flag(v))
printf("Tempfile:\n");
/* fall thru...*/
case RT_FILE:
if (!flag(v)) {
sunrad50(name, de->rt_name);
printf("%s\n", name);
break;
}
unrad50(2, de->rt_name, name);
unrad50(1, &(de->rt_name[2]), ext);
day = de->rt_date.rt_dy;
year = de->rt_date.rt_yr+72;
month = de->rt_date.rt_mo;
printf("%6.6s %3.3s %02d/%02d/%02d %d\n",name,
ext, month, day, year, de->rt_len);
break;
case RT_NULL:
printf("%-25.9s %d\n","<UNUSED>", de->rt_len);
break;
case RT_ESEG:
return(1);
}
return(0);
}
xcmd()
{
register char *de, *last;
int segnum;
char name[12];
register int i;
rt_init();
if (namc == 0) {
for (segnum = 0; segnum != -1;
segnum = rt_dir[segnum].rt_axhead.rt_nxtseg-1)
for (last = rt_last+(segnum*2*RT_BLOCK),
de = ((char *)&rt_dir[segnum])+10; de <= last;
de += rt_entsiz)
switch (rt(de)->rt_stat) {
case RT_ESEG:
return;
case RT_TEMP:
case RT_FILE:
sunrad50(name,rt(de)->rt_name);
rtx(name);
case RT_NULL:
;
}
} else
for (i = 0; i < namc; i++)
if (rtx(namv[i]) == 0)
namv[i] = 0;
}
rtx(name)
char *name;
{
register FLDOPE *dope;
FLDOPE *lookup();
register startad, count;
int file;
char buff[512];
if (dope = lookup(name)) {
if (flag(v))
rtls(dope->rtdope);
else
printf("x - %s\n",name);
if ((file = creat(name, 0666)) < 0)
return(1);
count = dope->count;
startad = dope->startad;
for( ; count > 0 ; count -= 512) {
lread(startad, 512, buff);
write(file, buff, 512);
startad += 512;
}
close(file);
return(0);
}
return(1);
}
rt_init()
{
static initized = 0;
register char *de, *last;
register i;
int dirnum;
char *mode;
FILE *temp_floppydes;
if (initized)
return;
initized = 1;
if (flag(c) || flag(d) || flag(r))
mode = "r+";
else
mode = "r";
if ((temp_floppydes = fopen(defdev, mode)) == NULL) {
perror(defdev);
exit(1);
} else
floppydes = fileno(temp_floppydes);
if (!flag(c)) {
lread(6*RT_BLOCK, 2*RT_BLOCK, (char *)&rt_dir[0]);
dirnum = rt_dir[0].rt_axhead.rt_numseg;
if (dirnum > RT_DIRSIZE) {
fprintf(stderr,"arff: too many directory segments\n");
exit(1);
}
for (i = 1; i < dirnum; i++)
lread((6+2*i)*RT_BLOCK, 2*RT_BLOCK, (char *)&rt_dir[i]);
} else
dirnum = 1;
rt_entsiz = 2*rt_dir[0].rt_axhead.rt_entpad + 14;
rt_entsiz = 14; /* assume rt_entpad = 0 ??? */
rt_last = ((char *) &rt_dir[0]) + 10 + 1014/rt_entsiz*rt_entsiz;
rt_nleft = 0;
for (i = 0; i < dirnum; i++) {
last = rt_last + i*2*RT_BLOCK;
for (de = ((char *)&rt_dir[i])+10; de <= last; de += rt_entsiz)
if (rt(de)->rt_stat == RT_ESEG)
break;
rt_curend[i] = rt(de);
rt_nleft += (last-de)/rt_entsiz;
}
}
static FLDOPE result;
FLDOPE *
lookup(name)
char *name;
{
unsigned short rname[3];
register char *de, *last;
int segnum;
register index;
srad50(name,rname);
/*
* Search for name, accumulate blocks in index
*/
rt_init();
for (segnum = 0; segnum != -1;
segnum = rt_dir[segnum].rt_axhead.rt_nxtseg - 1)
{
index = 0;
last = rt_last + segnum*2*RT_BLOCK;
for (de=((char *)&rt_dir[segnum])+10;
rt(de)->rt_stat != RT_ESEG; de += rt_entsiz)
switch(rt(de)->rt_stat) {
case RT_FILE:
case RT_TEMP:
if(samename(rname,rt(de)->rt_name)) {
result.count = rt(de)->rt_len * 512;
result.startad = 512*
(rt_dir[segnum].rt_axhead.rt_stfile + index);
result.rtdope = (struct rt_ent *) de;
return(&result);
}
case RT_NULL:
index += rt(de)->rt_len;
}
}
return((FLDOPE *) 0);
}
static
samename(a, b)
u_short a[], b[];
{
return(*a == *b && a[1] == b[1] && a[2] == b[2] );
}
rad50(cp, out)
register u_char *cp;
u_short *out;
{
register index, temp;
for (index = 0; *cp; index++) {
temp = Ain1 * table[*cp++];
if (*cp!=0) {
temp += Ain2 * table[*cp++];
if(*cp!=0)
temp += table[*cp++];
}
out[index] = temp;
}
}
#define reduce(x, p, q) (x = v[p/q], p %= q);
unrad50(count, in, cp)
u_short *in;
register char *cp;
{
register i, temp;
register u_char *v = (u_char *) val;
for (i = 0; i < count; i++) {
temp = in[i];
reduce(*cp++, temp, Ain1);
reduce(*cp++, temp, Ain2);
reduce(*cp++, temp, 1);
}
*cp=0;
}
srad50(name, rname)
register char *name;
register u_short *rname;
{
register index;
register char *cp;
char file[7], ext[4];
/*
* Find end of pathname
*/
for (cp = name; *cp++; )
;
while (cp >= name && *--cp != '/')
;
cp++;
/*
* Change to rad50
*/
for (index = 0; *cp; ) {
file[index++] = *cp++;
if (*cp == '.') {
cp++;
break;
}
if (index >= 6) {
break;
}
}
file[index] = 0;
for (index = 0; *cp; ) {
ext[index++] = *cp++;
if (*cp == '.' || index >= 3)
break;
}
ext[index]=0;
rname[0] = rname[1] = rname[2] = 0;
rad50((u_char *)file, rname);
rad50((u_char *)ext, rname+2);
}
sunrad50(name, rname)
u_short rname[];
register char *name;
{
register char *cp, *cp2;
char ext[4];
unrad50(2, rname, name);
unrad50(1, rname + 2, ext);
/*
* Jam name and extension together with a dot
* deleting white space
*/
for (cp = name; *cp++;)
;
--cp;
while (*--cp == ' ' && cp >= name)
;
*++cp = '.';
cp++;
for (cp2 = ext; *cp2 != ' ' && cp2 < ext+3;)
*cp++ = *cp2++;
*cp=0;
if (cp[-1] == '.')
cp[-1] = 0;
}
static char *oval = " ABCDEFGHIJKLMNOPQRSTUVWXYZ$.@0123456789";
static char *val = " abcdefghijklmnopqrstuvwxyz$.@0123456789";
static char table[256] = {
29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
0, 29, 29, 29, 27, 29, 29, 29, 29, 29, 29, 29, 29, 29, 28, 29,
30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 29, 29, 29, 29, 29, 29,
29, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 29, 29, 29, 29, 29,
29, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 29, 29, 29, 29, 29,
29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
0, 29, 29, 29, 27, 29, 29, 29, 29, 29, 29, 29, 29, 29, 28, 29,
30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 29, 29, 29, 29, 29, 29,
29, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 29, 29, 29, 29, 29,
29, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 29, 29, 29, 29 };
/*
* Logical to physical adress translation
*/
long
trans(logical)
register int logical;
{
register int sector, bytes, track;
logical += 26*128;
bytes = (logical&127);
logical >>= 7;
sector = logical%26;
if(sector >= 13)
sector = sector*2+1;
else
sector *= 2;
sector += 26 + ((track = (logical/26))-1)*6;
sector %= 26;
return((((track*26)+sector) << 7) + bytes);
}
lread(startad, count, obuff)
register startad, count;
register char *obuff;
{
long trans();
extern floppydes;
register int size = flag(m) ? 512 : 128;
rt_init();
while ((count -= size) >= 0) {
lseek(floppydes, flag(m) ?
(long)startad : trans(startad), 0);
if (read(floppydes, obuff, size) != size)
fprintf(stderr, "arff: read error block %d\n",
startad/size);
obuff += size;
startad += size;
}
}
lwrite(startad, count, obuff)
register startad, count;
register char *obuff;
{
long trans();
extern floppydes;
register int size = flag(m) ? 512 : 128;
rt_init();
while ((count -= size) >= 0) {
lseek(floppydes, flag(m) ?
(long)startad : trans(startad), 0);
if (write(floppydes, obuff, size) != size)
fprintf(stderr, "arff: write error block %d\n",
startad/size);
obuff += size;
startad += size;
}
}
rcmd()
{
register int i;
rt_init();
if (namc > 0)
for (i = 0; i < namc; i++)
if (rtr(namv[i]) == 0)
namv[i] = 0;
}
rtr(name)
char *name;
{
register FLDOPE *dope;
register struct rt_ent *de;
struct stat buf;
register struct stat *bufp = &buf;
int segnum;
register char *last;
if (stat(name, bufp) < 0) {
perror(name);
return(-1);
}
if (dope = lookup(name)) {
/* can replace, no problem */
de = dope->rtdope;
if (bufp->st_size <= (de->rt_len * 512))
printf("r - %s\n",name),
toflop(name, bufp->st_size, dope);
else {
fprintf(stderr, "%s will not fit in currently used file on floppy\n",name);
return(-1);
}
} else {
/* Search for vacant spot */
for (segnum = 0; segnum != -1;
segnum = rt_dir[segnum].rt_axhead.rt_nxtseg - 1)
{
last = rt_last + segnum*2*RT_BLOCK;
for (de = rt_dir[segnum].rt_ents;
rt(de)->rt_stat != RT_ESEG; de++)
if ((de)->rt_stat == RT_NULL) {
if (bufp->st_size <= (de->rt_len*512)) {
printf("a - %s\n",name),
mkent(de, segnum, bufp,name);
goto found;
}
continue;
}
}
printf("%s: no slot for file\n", name);
return (-1);
}
found:
if (dope = lookup(name)) {
toflop(name, bufp->st_size, dope);
return (0);
}
printf("%s: internal error, added then not found\n", name);
return (-1);
}
mkent(de, segnum, bufp, name)
register struct rt_ent *de;
int segnum;
register struct stat *bufp;
char *name;
{
struct tm *localtime();
register struct tm *timp;
register struct rt_ent *workp;
int count;
count = (((bufp->st_size -1) >>9) + 1);
/* make sure there is room */
if (de->rt_len == count)
goto overwrite;
if ((char *)rt_curend[segnum] == (rt_last + (segnum*2*RT_BLOCK))) {
/* no entries left on segment */
if (flag(o))
goto overwrite;
fprintf(stderr,"Directory segment #%d full on %s\n",segnum+1,
defdev);
exit(1);
}
/* copy directory entries up */
for (workp = rt_curend[segnum]+1; workp > de; workp--)
*workp = workp[-1];
de[1].rt_len -= count;
de->rt_len = count;
rt_curend[segnum]++;
rt_nleft--;
overwrite:
srad50(name,de->rt_name);
timp = localtime(&bufp->st_mtime);
de->rt_date.rt_dy = timp->tm_mday;
de->rt_date.rt_mo = timp->tm_mon + 1;
de->rt_date.rt_yr = timp->tm_year - 72;
de->rt_stat = RT_FILE;
de->rt_pad = 0;
de->rt_chan = 0;
de->rt_job = 0;
lwrite((6+segnum*2)*RT_BLOCK, 2*RT_BLOCK, (char *)&rt_dir[segnum]);
}
toflop(name, ocount, dope)
char *name;
register FLDOPE *dope;
long ocount;
{
register file, n, startad = dope->startad, count = ocount;
char buff[512];
file = open(name, 0);
if (file < 0) {
fprintf(stderr, "arff: couldn't open %s\n",name);
exit(1);
}
for( ; count >= 512; count -= 512) {
read(file, buff, 512);
lwrite(startad, 512, buff);
startad += 512;
}
read(file, buff, count);
close(file);
if (count <= 0)
return;
for (n = count; n < 512; n ++)
buff[n] = 0;
lwrite(startad, 512, buff);
count = (dope->rtdope->rt_len*512-ocount)/512 ;
if (count <= 0)
return;
for ( ; count > 0 ; count--) {
startad += 512;
lwrite(startad, 512, zeroes);
}
}
dcmd()
{
register int i;
rt_init();
if (namc)
for (i = 0; i < namc; i++)
if (rtk(namv[i])==0)
namv[i]=0;
if (dirdirty)
scrunch();
}
rtk(name)
char *name;
{
register FLDOPE *dope;
register struct rt_ent *de;
FLDOPE *lookup();
if (dope = lookup(name)) {
printf("d - %s\n",name);
de = dope->rtdope;
de->rt_stat = RT_NULL;
de->rt_name[0] = 0;
de->rt_name[1] = 0;
de->rt_name[2] = 0;
* ((u_short *)&(de->rt_date)) = 0;
dirdirty = 1;
return(0);
}
return(1);
}
scrunch()
{
register struct rt_ent *de , *workp;
register segnum;
for (segnum = 0; segnum != -1;
segnum = rt_dir[segnum].rt_axhead.rt_nxtseg - 1) {
dirdirty = 0;
for (de = rt_dir[segnum].rt_ents; de <= rt_curend[segnum]; de++)
if (de->rt_stat == RT_NULL && de[1].rt_stat == RT_NULL) {
(de+1)->rt_len += de->rt_len;
for (workp = de; workp < rt_curend[segnum]; workp++)
*workp = workp[1];
de--;
rt_curend[segnum]--;
rt_nleft++;
dirdirty = 1;
}
if (dirdirty)
lwrite((6+segnum*2)*RT_BLOCK, 2*RT_BLOCK,
(char *)&rt_dir[segnum]);
}
}