int
usersFileRead(char* path)
{
char *p;
File *file;
Fsys *fsys;
int len, r;
uvlong size;
if((fsys = fsysGet("main")) == nil)
return 0;
fsysFsRlock(fsys);
if(path == nil)
path = "/active/adm/users";
r = 0;
if((file = fileOpen(fsysGetFs(fsys), path)) != nil){
if(fileGetSize(file, &size)){
len = size;
p = vtMemAlloc(size+1);
if(fileRead(file, p, len, 0) == len){
p[len] = '\0';
r = uboxInit(p, len);
}
}
fileDecRef(file);
}
fsysFsRUnlock(fsys);
fsysPut(fsys);
return r;
}
int
fileMetaFlush(File *f, int rec)
{
File **kids, *p;
int nkids;
int i, rv;
fileMetaLock(f);
rv = fileMetaFlush2(f, nil);
fileMetaUnlock(f);
if(!rec || !fileIsDir(f))
return rv;
if(!fileLock(f))
return rv;
nkids = 0;
for(p=f->down; p; p=p->next)
nkids++;
kids = vtMemAlloc(nkids*sizeof(File*));
i = 0;
for(p=f->down; p; p=p->next){
kids[i++] = p;
p->ref++;
}
fileUnlock(f);
for(i=0; i<nkids; i++){
rv |= fileMetaFlush(kids[i], 1);
fileDecRef(kids[i]);
}
vtMemFree(kids);
return rv;
}
void *
vtMemAllocZ(int size)
{
void *p = vtMemAlloc(size);
memset(p, 0, size);
setmalloctag(p, getcallerpc(&size));
return p;
}
VtSha1 *
vtSha1Alloc(void)
{
VtSha1 *s;
s = vtMemAlloc(sizeof(VtSha1));
vtSha1Init(s);
return s;
}
static uchar*
copyBlock(Block *b, u32int blockSize)
{
uchar *data;
data = vtMemAlloc(blockSize);
if(data == nil)
return nil;
memmove(data, b->data, blockSize);
return data;
}
void *
vtMemRealloc(void *p, int size)
{
if(p == nil)
return vtMemAlloc(size);
p = realloc(p, size);
if(p == 0)
vtFatal("vtRealloc: out of memory");
setrealloctag(p, getcallerpc(&size));
return p;
}
static int
deeFill(DirEntryEnum *dee)
{
int i, n;
Source *meta, *source;
MetaBlock mb;
MetaEntry me;
File *f;
Block *b;
DirEntry *de;
/* clean up first */
for(i=dee->i; i<dee->n; i++)
deCleanup(dee->buf+i);
vtMemFree(dee->buf);
dee->buf = nil;
dee->i = 0;
dee->n = 0;
f = dee->file;
source = f->source;
meta = f->msource;
b = sourceBlock(meta, dee->boff, OReadOnly);
if(b == nil)
goto Err;
if(!mbUnpack(&mb, b->data, meta->dsize))
goto Err;
n = mb.nindex;
dee->buf = vtMemAlloc(n * sizeof(DirEntry));
for(i=0; i<n; i++){
de = dee->buf + i;
meUnpack(&me, &mb, i);
if(!deUnpack(de, &me))
goto Err;
dee->n++;
if(!(de->mode & ModeDir))
if(!dirEntrySize(source, de->entry, de->gen, &de->size))
goto Err;
}
dee->boff++;
blockPut(b);
return 1;
Err:
blockPut(b);
return 0;
}
/*
* Fsck that MetaBlock has reasonable header, sorted entries,
*/
static int
chkMetaBlock(MetaBlock *mb)
{
MetaChunk *mc;
int oo, o, n, i;
uchar *p;
mc = vtMemAlloc(mb->nindex*sizeof(MetaChunk));
p = mb->buf + MetaHeaderSize;
for(i = 0; i < mb->nindex; i++){
mc[i].offset = p[0]<<8 | p[1];
mc[i].size = p[2]<<8 | p[3];
mc[i].index = i;
p += MetaIndexSize;
}
qsort(mc, mb->nindex, sizeof(MetaChunk), offsetCmp);
/* check block looks ok */
oo = MetaHeaderSize + mb->maxindex*MetaIndexSize;
o = oo;
n = 0;
for(i = 0; i < mb->nindex; i++){
o = mc[i].offset;
n = mc[i].size;
if(o < oo)
goto Err;
oo += n;
}
if(o+n > mb->size || mb->size - oo != mb->free)
goto Err;
vtMemFree(mc);
return 1;
Err:
if(0){
fprint(2, "metaChunks failed!\n");
oo = MetaHeaderSize + mb->maxindex*MetaIndexSize;
for(i=0; i<mb->nindex; i++){
fprint(2, "\t%d: %d %d\n", i, mc[i].offset,
mc[i].offset + mc[i].size);
oo += mc[i].size;
}
fprint(2, "\tused=%d size=%d free=%d free2=%d\n",
oo, mb->size, mb->free, mb->size - oo);
}
vtMemFree(mc);
return 0;
}
static MetaChunk *
metaChunks(MetaBlock *mb)
{
MetaChunk *mc;
int oo, o, n, i;
uchar *p;
mc = vtMemAlloc(mb->nindex*sizeof(MetaChunk));
p = mb->buf + MetaHeaderSize;
for(i = 0; i<mb->nindex; i++){
mc[i].offset = U16GET(p);
mc[i].size = U16GET(p+2);
mc[i].index = i;
p += MetaIndexSize;
}
qsort(mc, mb->nindex, sizeof(MetaChunk), offsetCmp);
/* check block looks ok */
oo = MetaHeaderSize + mb->maxindex*MetaIndexSize;
o = oo;
n = 0;
for(i=0; i<mb->nindex; i++){
o = mc[i].offset;
n = mc[i].size;
if(o < oo)
goto Err;
oo += n;
}
if(o+n > mb->size)
goto Err;
if(mb->size - oo != mb->free)
goto Err;
return mc;
Err:
fprint(2, "metaChunks failed!\n");
oo = MetaHeaderSize + mb->maxindex*MetaIndexSize;
for(i=0; i<mb->nindex; i++){
fprint(2, "\t%d: %d %d\n", i, mc[i].offset, mc[i].offset + mc[i].size);
oo += mc[i].size;
}
fprint(2, "\tused=%d size=%d free=%d free2=%d\n", oo, mb->size, mb->free, mb->size - oo);
vtSetError(EBadMeta);
vtMemFree(mc);
return nil;
}
static int
stringUnpack(char **s, uchar **p, int *n)
{
int nn;
if(*n < 2)
return 0;
nn = U16GET(*p);
*p += 2;
*n -= 2;
if(nn > *n)
return 0;
*s = vtMemAlloc(nn+1);
memmove(*s, *p, nn);
(*s)[nn] = 0;
*p += nn;
*n -= nn;
return 1;
}
int
vtGetString(Packet *p, char **ret)
{
uint8_t buf[2];
int n;
char *s;
if(!packetConsume(p, buf, 2))
return 0;
n = (buf[0]<<8) + buf[1];
if(n > VtMaxStringSize) {
vtSetError(EBigString);
return 0;
}
s = vtMemAlloc(n+1);
setmalloctag(s, getcallerpc());
if(!packetConsume(p, (uint8_t*)s, n)) {
vtMemFree(s);
return 0;
}
s[n] = 0;
*ret = s;
return 1;
}
static int
uboxInit(char* users, int len)
{
User *g, *u;
Ubox *box, *obox;
int blank, comment, i, nline, nuser;
char *buf, *f[5], **line, *p, *q, *s;
/*
* Strip out whitespace and comments.
* Note that comments are pointless, they disappear
* when the server writes the database back out.
*/
blank = 1;
comment = nline = 0;
s = p = buf = vtMemAlloc(len+1);
for(q = users; *q != '\0'; q++){
if(*q == '\r' || *q == '\t' || *q == ' ')
continue;
if(*q == '\n'){
if(!blank){
if(p != s){
*p++ = '\n';
nline++;
s = p;
}
blank = 1;
}
comment = 0;
continue;
}
if(*q == '#')
comment = 1;
blank = 0;
if(!comment)
*p++ = *q;
}
*p = '\0';
line = vtMemAllocZ((nline+2)*sizeof(char*));
if((i = gettokens(buf, line, nline+2, "\n")) != nline){
fprint(2, "nline %d (%d) botch\n", nline, i);
vtMemFree(line);
vtMemFree(buf);
return 0;
}
/*
* Everything is updated in a local Ubox until verified.
*/
box = vtMemAllocZ(sizeof(Ubox));
/*
* First pass - check format, check for duplicates
* and enter in hash buckets.
*/
nuser = 0;
for(i = 0; i < nline; i++){
s = vtStrDup(line[i]);
if(getfields(s, f, nelem(f), 0, ":") != 4){
fprint(2, "bad line '%s'\n", line[i]);
vtMemFree(s);
continue;
}
if(*f[0] == '\0' || *f[1] == '\0'){
fprint(2, "bad line '%s'\n", line[i]);
vtMemFree(s);
continue;
}
if(!validUserName(f[0])){
fprint(2, "invalid uid '%s'\n", f[0]);
vtMemFree(s);
continue;
}
if(_userByUid(box, f[0]) != nil){
fprint(2, "duplicate uid '%s'\n", f[0]);
vtMemFree(s);
continue;
}
if(!validUserName(f[1])){
fprint(2, "invalid uname '%s'\n", f[0]);
vtMemFree(s);
continue;
}
if(_userByUname(box, f[1]) != nil){
fprint(2, "duplicate uname '%s'\n", f[1]);
vtMemFree(s);
continue;
}
u = userAlloc(f[0], f[1]);
uboxAddUser(box, u);
line[nuser] = line[i];
nuser++;
vtMemFree(s);
}
assert(box->nuser == nuser);
/*
* Second pass - fill in leader and group information.
*/
for(i = 0; i < nuser; i++){
s = vtStrDup(line[i]);
getfields(s, f, nelem(f), 0, ":");
assert(g = _userByUname(box, f[1]));
if(*f[2] != '\0'){
if((u = _userByUname(box, f[2])) == nil)
g->leader = vtStrDup(g->uname);
else
g->leader = vtStrDup(u->uname);
box->len += strlen(g->leader);
}
for(p = f[3]; p != nil; p = q){
if((q = utfrune(p, L',')) != nil)
*q++ = '\0';
if(!_groupAddMember(box, g, p)){
// print/log error here
}
}
vtMemFree(s);
}
vtMemFree(line);
vtMemFree(buf);
for(i = 0; usersMandatory[i] != nil; i++){
if((u = _userByUid(box, usersMandatory[i])) == nil){
vtSetError("user '%s' is mandatory", usersMandatory[i]);
uboxFree(box);
return 0;
}
if(strcmp(u->uid, u->uname) != 0){
vtSetError("uid/uname for user '%s' must match",
usersMandatory[i]);
uboxFree(box);
return 0;
}
}
vtLock(ubox.lock);
obox = ubox.box;
ubox.box = box;
vtUnlock(ubox.lock);
if(obox != nil)
uboxFree(obox);
return 1;
}
static int
usersFileWrite(Ubox* box)
{
Fs *fs;
User *u;
int i, r;
Fsys *fsys;
char *p, *q, *s;
File *dir, *file;
if((fsys = fsysGet("main")) == nil)
return 0;
fsysFsRlock(fsys);
fs = fsysGetFs(fsys);
/*
* BUG:
* the owner/group/permissions need to be thought out.
*/
r = 0;
if((dir = fileOpen(fs, "/active")) == nil)
goto tidy0;
if((file = fileWalk(dir, uidadm)) == nil)
file = fileCreate(dir, uidadm, ModeDir|0775, uidadm);
fileDecRef(dir);
if(file == nil)
goto tidy;
dir = file;
if((file = fileWalk(dir, "users")) == nil)
file = fileCreate(dir, "users", 0664, uidadm);
fileDecRef(dir);
if(file == nil)
goto tidy;
if(!fileTruncate(file, uidadm))
goto tidy;
p = s = vtMemAlloc(box->len+1);
q = p + box->len+1;
for(u = box->head; u != nil; u = u->next){
p += snprint(p, q-p, "%s:%s:", u->uid, u->uname);
if(u->leader != nil)
p+= snprint(p, q-p, u->leader);
p += snprint(p, q-p, ":");
if(u->ngroup){
p += snprint(p, q-p, u->group[0]);
for(i = 1; i < u->ngroup; i++)
p += snprint(p, q-p, ",%s", u->group[i]);
}
p += snprint(p, q-p, "\n");
}
r = fileWrite(file, s, box->len, 0, uidadm);
vtMemFree(s);
tidy:
if(file != nil)
fileDecRef(file);
tidy0:
fsysFsRUnlock(fsys);
fsysPut(fsys);
return r;
}
