1999/1230/port/chan.c (diff list | history)

1999/1224/sys/src/9/port/chan.c:19,25 – 1999/1230/sys/src/9/port/chan.c:19,25 (short | long | prev | next)
1990/0227		}chanalloc;
1999/0629		#define SEP(c) ((c) == 0 || (c) == '/')
1999/0811		void cleancname(Cname*, int);
1999/1230		void cleancname(Cname*);
1999/0629
1990/0227		int incref(Ref *r)
1999/1224/sys/src/9/port/chan.c:483,489 – 1999/1230/sys/src/9/port/chan.c:483,489
1999/1224		c->name = addelem(c->name, name); if(dotdot){ cleancname(c->name, c->name->s[0]=='#'); /* could be cheaper */
1999/1230		cleancname(c->name); /* could be cheaper */
1999/1224		c = undomount(c); } return c;
1999/1224/sys/src/9/port/chan.c:644,693 – 1999/1230/sys/src/9/port/chan.c:644,668
1999/0629		* In place, rewrite name to compress multiple /, eliminate ., and process .. */ void
1999/0716		cleancname(Cname *n, int offset)
1999/1230		cleancname(Cname *n)
1999/0629		{ char *p, *q, *dotdot, *name; int rooted;
1999/1230		char *p;
1999/0629		name = n->s+offset; rooted = name[0] == '/';
1999/1230		if(n->s[0] == '#'){ p = strchr(n->s, '/'); if(p == nil) return; cleanname(p);
1999/0629		/* * invariants: * p points at beginning of path element we're considering. * q points just past the last path element we wrote (no slash). * dotdot points just past the point where .. cannot backtrack * any further (no slash). */ p = q = dotdot = name+rooted; while(*p) { if(p[0] == '/') /* null element */ p++; else if(p[0] == '.' && SEP(p[1])) p += 1; /* don't count the separator in case it is nul */ else if(p[0] == '.' && p[1] == '.' && SEP(p[2])) { p += 2; if(q > dotdot) { /* can backtrack */ while(--q > dotdot && *q != '/') ;
1999/0716		} else if(!rooted) { /* /.. is / but ./../ is .. */
1999/0629		if(q != name) *q++ = '/'; *q++ = '.'; *q++ = '.'; dotdot = q; } } else { /* real path element */ if(q != name+rooted) *q++ = '/'; while((*q = *p) != '/' && *q != 0) p++, q++; } } if(q == name) /* empty string is really ``.'' */ *q++ = '.';
1999/0716		*q = '\0';
1999/0629		n->len = (q-name) + offset;
1999/1230		/* * The correct name is #i rather than #i/, * but the correct name of #/ is #/. */ if(strcmp(p, "/")==0 && n->s[1] != '/') *p = '\0'; }else cleanname(n->s); n->len = strlen(n->s);
1999/0629		} /*
1999/1224/sys/src/9/port/chan.c:911,922 – 1999/1230/sys/src/9/port/chan.c:886,893
1999/0629		poperror(); /* peculiar workaround for #/ */ if(newname){ if(cname->s[0]=='#' && cname->s[1]=='/')
1999/0716		cleancname(cname, 1);
1999/0629		else
1999/0716		cleancname(cname, 0);
1999/1230		cleancname(cname);
1999/0629		cnameclose(c->name); c->name = cname; }else