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/*
* rockridg.c
*
* ISO-9660 RockRidge format filter
*/
#include "fd.h"
#include "device.h"
#include "parse.h"
#include "func.h"
#define TRANSTBLFILE "TRANS.TBL"
#define TRANSTBLVAR 1
#define RR_TRANS 001
#define RR_LOWER 002
#define RR_VERNO 004
#define RR_HYPHN 010
typedef struct _transtable {
char *org;
char *alias;
char *slink;
r_dev_t rdev;
char type;
struct _transtable *next;
} transtable;
#ifndef _NOROCKRIDGE
static char *NEAR getorgname __P_((char *, int));
static XFILE *NEAR opentranstbl __P_((CONST char *, int, int *));
static transtable *NEAR readtranstbl __P_((CONST char *, int));
static VOID NEAR freetranstbl __P_((transtable *));
static transtable *NEAR inittrans __P_((CONST char *, int));
static VOID NEAR cachetrans __P_((CONST char *, CONST char *));
static char *NEAR transfile __P_((CONST char *, int, char *, int));
static char *NEAR detransfile __P_((CONST char *, int, char *, int));
static char *NEAR detransdir __P_((CONST char *, char *, int));
char *rockridgepath = NULL;
int norockridge = 0;
static transtable *rr_curtbl = NULL;
static char *rr_cwd = NULL;
static char *rr_transcwd = NULL;
static char *NEAR getorgname(name, flags)
char *name;
int flags;
{
char *cp;
int len;
cp = Xstrchr(name, ';');
len = (cp) ? cp - name : strlen(name);
if (flags & RR_LOWER) Xstrntolower(name, len);
if ((flags & RR_VERNO) && cp) {
if (flags & RR_HYPHN) *cp = '-';
cp += 2;
}
*cp = '\0';
return(name);
}
static XFILE *NEAR opentranstbl(path, len, flagsp)
CONST char *path;
int len, *flagsp;
{
XFILE *fp;
char *cp, *file, buf[MAXPATHLEN];
if (len + 1 >= MAXPATHLEN - 1) return(NULL);
Xstrncpy(buf, path, len);
file = strcatdelim(buf);
cp = Xstrncpy(file, TRANSTBLFILE, MAXPATHLEN - 1 - (file - buf));
*flagsp = RR_TRANS;
if ((fp = Xfopen(buf, "r"))) return(fp);
len = cp - buf;
if (len + 1 >= MAXPATHLEN - 1) return(NULL);
VOID_C Xsnprintf(&(buf[len]), (int)sizeof(buf) - len,
";%d", TRANSTBLVAR);
*flagsp |= RR_VERNO;
if ((fp = Xfopen(buf, "r"))) return(fp);
buf[len] = '-';
*flagsp |= RR_HYPHN;
if ((fp = Xfopen(buf, "r"))) return(fp);
buf[len] = '\0';
Xstrtolower(file);
*flagsp = RR_TRANS | RR_LOWER;
if ((fp = Xfopen(buf, "r"))) return(fp);
buf[len] = ';';
*flagsp |= RR_VERNO;
if ((fp = Xfopen(buf, "r"))) return(fp);
buf[len] = '-';
*flagsp |= RR_HYPHN;
if ((fp = Xfopen(buf, "r"))) return(fp);
return(NULL);
}
static transtable *NEAR readtranstbl(path, len)
CONST char *path;
int len;
{
transtable *top, **bottom, *new;
XFILE *fp;
r_dev_t maj, min;
char *cp, *eol, *org, *line;
int l1, l2, flags;
norockridge++;
#ifdef FAKEUNINIT
flags = 0;
#endif
fp = opentranstbl(path, len, &flags);
norockridge--;
if (!fp) return(NULL);
top = NULL;
bottom = ⊤
while ((line = Xfgets(fp))) {
cp = line;
switch (*cp) {
case 'F':
case 'D':
case 'B':
case 'C':
case 'L':
case 'S':
case 'P':
cp++;
break;
default:
*cp = '\0';
break;
}
if (!*(cp = skipspace(cp))) {
Xfree(line);
continue;
}
for (eol = cp; *eol; eol++) if (Xisblank(*eol)) break;
if (*eol) *(eol++) = '\0';
if (!*(eol = skipspace(eol))) {
Xfree(line);
continue;
}
org = getorgname(cp, flags);
cp = eol;
while (*eol && !Xisblank(*eol)) eol++;
l1 = eol - cp;
if (*eol) *(eol++) = '\0';
l2 = 0;
maj = min = (r_dev_t)-1;
if (*line == 'L') {
eol = skipspace(eol);
while (eol[l2] && !Xisblank(eol[l2])) l2++;
eol[l2++] = '\0';
}
else if (*line == 'B' || *line == 'C') {
eol = skipspace(eol);
eol = Xsscanf(eol, "%+*d", sizeof(r_dev_t), &maj);
if (eol) {
eol = skipspace(eol);
eol = Xsscanf(eol, "%+*d",
sizeof(r_dev_t), &min);
if (!eol) maj = (r_dev_t)-1;
}
}
new = (transtable *)Xmalloc(sizeof(transtable));
new -> org = Xstrdup(org);
new -> alias = Xstrndup(cp, l1);
new -> slink = (l2 > 0) ? Xstrndup(eol, l2 - 1) : NULL;
new -> type = *line;
new -> rdev = (maj != (r_dev_t)-1)
? makedev(maj, min) : (r_dev_t)-1;
*bottom = new;
new -> next = NULL;
bottom = &(new -> next);
Xfree(line);
}
if (top) *bottom = top;
VOID_C Xfclose(fp);
return(top);
}
static VOID NEAR freetranstbl(tbl)
transtable *tbl;
{
transtable *tp;
if (tbl) {
tp = tbl -> next;
tbl -> next = NULL;
while (tp) {
tbl = tp;
tp = tbl -> next;
Xfree(tbl -> org);
Xfree(tbl -> alias);
Xfree(tbl -> slink);
Xfree(tbl);
}
}
}
static transtable *NEAR inittrans(path, len)
CONST char *path;
int len;
{
transtable *tp;
if (len < 0) len = strlen(path);
if (rr_cwd && !strnpathcmp(path, rr_cwd, len) && !rr_cwd[len])
return(rr_curtbl);
if (!(tp = readtranstbl(path, len))) return(NULL);
freetranstbl(rr_curtbl);
rr_curtbl = tp;
Xfree(rr_cwd);
rr_cwd = Xstrndup(path, len);
Xfree(rr_transcwd);
rr_transcwd = NULL;
return(rr_curtbl);
}
static VOID NEAR cachetrans(path, trans)
CONST char *path, *trans;
{
CONST char *cp1, *cp2;
int len;
if (!rr_cwd) return;
cp1 = path;
cp2 = trans;
len = strlen(rr_cwd);
for (;;) {
if (!(cp1 = strdelim(cp1, 0)) || cp1 - path > len) return;
if (!(cp2 = strdelim(cp2, 0))) return;
if (cp1 - path == len) break;
cp1++;
cp2++;
}
if (strnpathcmp(path, rr_cwd, len)) return;
Xfree(rr_transcwd);
rr_transcwd = Xstrndup(trans, cp2 - trans);
}
static char *NEAR transfile(file, len, buf, ptr)
CONST char *file;
int len;
char *buf;
int ptr;
{
transtable *tp;
if (len < 0) len = strlen(file);
tp = rr_curtbl;
for (;;) {
if (!strnpathcmp(file, tp -> org, len) && !(tp -> org[len])) {
rr_curtbl = tp;
buf = Xstrncpy(&(buf[ptr]), tp -> alias,
MAXPATHLEN - 1 - ptr);
return(buf);
}
if ((tp = tp -> next) == rr_curtbl) break;
}
return(NULL);
}
char *transpath(path, buf)
CONST char *path;
char *buf;
{
CONST char *cp;
char *tmp, *next;
int ptr, len, dlen;
if (!(cp = includepath(path, rockridgepath)) || !*cp)
return((char *)path);
if (!rr_cwd || !rr_transcwd
|| strnpathcmp(path, rr_cwd, len = strlen(rr_cwd))) {
ptr = cp - path;
Xstrncpy(buf, path, ptr);
}
else {
Xstrcpy(buf, rr_transcwd);
if (!path[len]) return(buf);
ptr = strlen(buf);
cp = &(path[len]);
}
while (cp) {
dlen = cp++ - path;
buf[ptr++] = _SC_;
if ((next = strdelim(cp, 0))) len = next - cp;
else len = strlen(cp);
if (!inittrans(path, dlen)) tmp = NULL;
else tmp = transfile(cp, len, buf, ptr);
if (!tmp) tmp = Xstrncpy(&(buf[ptr]), cp, len);
ptr = tmp - buf;
cp = next;
}
cachetrans(path, buf);
return(buf);
}
static char *NEAR detransfile(file, len, buf, ptr)
CONST char *file;
int len;
char *buf;
int ptr;
{
transtable *tp;
if (len < 0) len = strlen(file);
tp = rr_curtbl;
for (;;) {
if (!strnpathcmp(file, tp -> alias, len)
&& !(tp -> alias[len])) {
rr_curtbl = tp;
buf = Xstrncpy(&(buf[ptr]), tp -> org,
MAXPATHLEN - 1 - ptr);
return(buf);
}
if ((tp = tp -> next) == rr_curtbl) break;
}
return(NULL);
}
static char *NEAR detransdir(dir, buf, ptr)
CONST char *dir;
char *buf;
int ptr;
{
char *cp, *next;
int dlen, flen;
while (dir) {
dlen = ptr;
buf[ptr++] = _SC_;
if ((next = strdelim(dir, 0))) flen = next++ - dir;
else flen = strlen(dir);
if (!inittrans(buf, dlen)) cp = NULL;
else cp = detransfile(dir, flen, buf, ptr);
if (!cp) cp = Xstrncpy(&(buf[ptr]), dir, flen);
ptr = cp - buf;
dir = next;
}
return(&(buf[ptr]));
}
char *detranspath(path, buf)
CONST char *path;
char *buf;
{
CONST char *cp;
int ptr, len;
if (!path) {
freetranstbl(rr_curtbl);
rr_curtbl = NULL;
Xfree(rr_cwd);
rr_cwd = NULL;
Xfree(rr_transcwd);
rr_transcwd = NULL;
return(NULL);
}
if (!(cp = includepath(path, rockridgepath)) || !*cp)
return((char *)path);
if (!rr_transcwd || !rr_cwd
|| strnpathcmp(path, rr_transcwd, len = strlen(rr_transcwd))) {
ptr = cp++ - path;
Xstrncpy(buf, path, ptr);
}
else {
Xstrcpy(buf, rr_cwd);
if (!path[len]) return(buf);
ptr = strlen(buf);
cp = &(path[len + 1]);
}
detransdir(cp, buf, ptr);
cachetrans(buf, path);
return(buf);
}
int rrlstat(path, stp)
CONST char *path;
struct stat *stp;
{
transtable *tp;
char *cp;
u_int mode;
if (!(cp = strrdelim(path, 0)) || !inittrans(path, cp++ - path))
return(-1);
tp = rr_curtbl;
for (;;) {
if (!strpathcmp(cp, tp -> org)) break;
if ((tp = tp -> next) == rr_curtbl) return(-1);
}
rr_curtbl = tp;
if ((mode = getfmode(tp -> type)) == (u_int)-1) mode = S_IFREG;
stp -> st_mode &= ~S_IFMT;
stp -> st_mode |= mode;
if ((mode == S_IFBLK || mode == S_IFCHR) && tp -> rdev != (r_dev_t)-1)
stp -> st_rdev = tp -> rdev;
return(0);
}
int rrreadlink(path, buf, bufsiz)
CONST char *path;
char *buf;
int bufsiz;
{
transtable *tp;
char *cp;
int len;
if (!(cp = strrdelim(path, 0)) || !inittrans(path, cp++ - path))
return(-1);
tp = rr_curtbl;
for (;;) {
if (!strpathcmp(cp, tp -> org)) break;
if ((tp = tp -> next) == rr_curtbl) return(-1);
}
rr_curtbl = tp;
if (tp -> type != 'L' || !(tp -> slink)) return(-1);
len = strlen(tp -> slink);
if (len > bufsiz) len = bufsiz;
memcpy(buf, tp -> slink, len);
return(len);
}
#endif /* !_NOROCKRIDGE */
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