Ejemplo n.º 1
0
File *
fileGetParent(File *f)
{
	if(fileIsRoot(f))
		return fileIncRef(f);
	return fileIncRef(f->up);
}
Ejemplo n.º 2
0
File *
_fileOpen(Fs *fs, char *path, int partial)
{
	File *f, *ff;
	char *p, elem[VtMaxStringSize], *opath;
	int n;

	f = fs->file;
	fileIncRef(f);
	opath = path;
	while(*path != 0){
		for(p = path; *p && *p != '/'; p++)
			;
		n = p - path;
		if(n > 0){
			if(n > VtMaxStringSize){
				vtSetError("%s: element too long", EBadPath);
				goto Err;
			}
			memmove(elem, path, n);
			elem[n] = 0;
			ff = _fileWalk(f, elem, partial && *p=='\0');
			if(ff == nil){
				vtSetError("%.*s: %R", utfnlen(opath, p-opath),
					opath);
				goto Err;
			}
			fileDecRef(f);
			f = ff;
		}
		if(*p == '/')
			p++;
		path = p;
	}
	return f;
Err:
	fileDecRef(f);
	return nil;
}
Ejemplo n.º 3
0
DirEntryEnum *
deeOpen(File *f)
{
	DirEntryEnum *dee;
	File *p;

	if(!fileIsDir(f)){
		vtSetError(ENotDir);
		fileDecRef(f);
		return nil;
	}

	/* flush out meta data */
	if(!fileLock(f))
		return nil;
	for(p=f->down; p; p=p->next)
		fileMetaFlush2(p, nil);
	fileUnlock(f);

	dee = vtMemAllocZ(sizeof(DirEntryEnum));
	dee->file = fileIncRef(f);

	return dee;
}
Ejemplo n.º 4
0
File *
fileCreate(File *f, char *elem, ulong mode, char *uid)
{
	File *ff;
	DirEntry *dir;
	Source *pr, *r, *mr;
	int isdir;

	if(!fileLock(f))
		return nil;

	r = nil;
	mr = nil;
	for(ff = f->down; ff; ff=ff->next){
		if(strcmp(elem, ff->dir.elem) == 0 && !ff->removed){
			ff = nil;
			vtSetError(EExists);
			goto Err1;
		}
	}

	ff = dirLookup(f, elem);
	if(ff != nil){
		vtSetError(EExists);
		goto Err1;
	}

	pr = f->source;
	if(pr->mode != OReadWrite){
		vtSetError(EReadOnly);
		goto Err1;
	}

	if(!sourceLock2(f->source, f->msource, -1))
		goto Err1;

	ff = fileAlloc(f->fs);
	isdir = mode & ModeDir;

	r = sourceCreate(pr, pr->dsize, isdir, 0);
	if(r == nil)
		goto Err;
	if(isdir){
		mr = sourceCreate(pr, pr->dsize, 0, r->offset);
		if(mr == nil)
			goto Err;
	}

	dir = &ff->dir;
	dir->elem = vtStrDup(elem);
	dir->entry = r->offset;
	dir->gen = r->gen;
	if(isdir){
		dir->mentry = mr->offset;
		dir->mgen = mr->gen;
	}
	dir->size = 0;
	if(!fsNextQid(f->fs, &dir->qid))
		goto Err;
	dir->uid = vtStrDup(uid);
	dir->gid = vtStrDup(f->dir.gid);
	dir->mid = vtStrDup(uid);
	dir->mtime = time(0L);
	dir->mcount = 0;
	dir->ctime = dir->mtime;
	dir->atime = dir->mtime;
	dir->mode = mode;

	ff->boff = fileMetaAlloc(f, dir, 0);
	if(ff->boff == NilBlock)
		goto Err;

	sourceUnlock(f->source);
	sourceUnlock(f->msource);

	ff->source = r;
	r->file = ff;			/* point back */
	ff->msource = mr;

	if(mode&ModeTemporary){
		if(!sourceLock2(r, mr, -1))
			goto Err1;
		fileSetTmp(ff, 1);
		sourceUnlock(r);
		if(mr)
			sourceUnlock(mr);
	}

	/* committed */

	/* link in and up parent ref count */
	ff->next = f->down;
	f->down = ff;
	ff->up = f;
	fileIncRef(f);

	fileWAccess(f, uid);

	fileUnlock(f);
	return ff;

Err:
	sourceUnlock(f->source);
	sourceUnlock(f->msource);
Err1:
	if(r){
		sourceLock(r, -1);
		sourceRemove(r);
	}
	if(mr){
		sourceLock(mr, -1);
		sourceRemove(mr);
	}
	if(ff)
		fileDecRef(ff);
	fileUnlock(f);
	return 0;
}
Ejemplo n.º 5
0
File *
_fileWalk(File *f, char *elem, int partial)
{
	File *ff;

	fileRAccess(f);

	if(elem[0] == 0){
		vtSetError(EBadPath);
		return nil;
	}

	if(!fileIsDir(f)){
		vtSetError(ENotDir);
		return nil;
	}

	if(strcmp(elem, ".") == 0){
		return fileIncRef(f);
	}

	if(strcmp(elem, "..") == 0){
		if(fileIsRoot(f))
			return fileIncRef(f);
		return fileIncRef(f->up);
	}

	if(!fileLock(f))
		return nil;

	for(ff = f->down; ff; ff=ff->next){
		if(strcmp(elem, ff->dir.elem) == 0 && !ff->removed){
			ff->ref++;
			goto Exit;
		}
	}

	ff = dirLookup(f, elem);
	if(ff == nil)
		goto Err;

	if(ff->dir.mode & ModeSnapshot){
		ff->mode = OReadOnly;
		ff->issnapshot = 1;
	}

	if(partial){
		/*
		 * Do nothing.  We're opening this file only so we can clri it.
		 * Usually the sources can't be opened, hence we won't even bother.
		 * Be VERY careful with the returned file.  If you hand it to a routine
		 * expecting ff->source and/or ff->msource to be non-nil, we're
		 * likely to dereference nil.  FileClri should be the only routine
		 * setting partial.
		 */
		ff->partial = 1;
	}else if(ff->dir.mode & ModeDir){
		ff->source = fileOpenSource(f, ff->dir.entry, ff->dir.gen,
			1, ff->mode, ff->issnapshot);
		ff->msource = fileOpenSource(f, ff->dir.mentry, ff->dir.mgen,
			0, ff->mode, ff->issnapshot);
		if(ff->source == nil || ff->msource == nil)
			goto Err;
	}else{
		ff->source = fileOpenSource(f, ff->dir.entry, ff->dir.gen,
			0, ff->mode, ff->issnapshot);
		if(ff->source == nil)
			goto Err;
	}

	/* link in and up parent ref count */
	if (ff->source)
		ff->source->file = ff;		/* point back */
	ff->next = f->down;
	f->down = ff;
	ff->up = f;
	fileIncRef(f);
Exit:
	fileUnlock(f);
	return ff;
Err:
	fileUnlock(f);
	if(ff != nil)
		fileDecRef(ff);
	return nil;
}
Ejemplo n.º 6
0
Archivo: fs.c Proyecto: bhanug/harvey
File *
fsGetRoot(Fs *fs)
{
	return fileIncRef(fs->file);
}