void *alignedMalloc(size_t size, size_t align)
{
void *mem = userAlloc(size + (align-1) + sizeof(void*));
char *amem = ((char*)mem) + sizeof(void*);
if( (uintptr_t)amem & (align - 1) )
amem += align - ((uintptr_t)amem & (align - 1));
((void**)amem)[-1] = mem;
return amem;
}
static int
cmdUname(int argc, char* argv[])
{
User *u, *up;
int d, dflag, i, r;
char *p, *uid, *uname;
char *createfmt = "fsys main create /active/usr/%s %s %s d775";
char *usage = "usage: uname [-d] uname [uid|:uid|%%newname|=leader|+member|-member]";
dflag = 0;
ARGBEGIN{
default:
return cliError(usage);
case 'd':
dflag = 1;
break;
}ARGEND
if(argc < 1){
if(!dflag)
return cliError(usage);
vtRLock(ubox.lock);
uboxDump(ubox.box);
vtRUnlock(ubox.lock);
return 1;
}
uname = argv[0];
argc--; argv++;
if(argc == 0){
vtRLock(ubox.lock);
if((u = _userByUname(ubox.box, uname)) == nil){
vtRUnlock(ubox.lock);
return 0;
}
consPrint("\t%U\n", u);
vtRUnlock(ubox.lock);
return 1;
}
vtLock(ubox.lock);
u = _userByUname(ubox.box, uname);
while(argc--){
if(argv[0][0] == '%'){
if(u == nil){
vtUnlock(ubox.lock);
return 0;
}
p = &argv[0][1];
if((up = _userByUname(ubox.box, p)) != nil){
vtSetError("uname: uname '%s' already exists",
up->uname);
vtUnlock(ubox.lock);
return 0;
}
for(i = 0; usersMandatory[i] != nil; i++){
if(strcmp(usersMandatory[i], uname) != 0)
continue;
vtSetError("uname: uname '%s' is mandatory",
uname);
vtUnlock(ubox.lock);
return 0;
}
d = strlen(p) - strlen(u->uname);
for(up = ubox.box->head; up != nil; up = up->next){
if(up->leader != nil){
if(strcmp(up->leader, u->uname) == 0){
vtMemFree(up->leader);
up->leader = vtStrDup(p);
ubox.box->len += d;
}
}
for(i = 0; i < up->ngroup; i++){
if(strcmp(up->group[i], u->uname) != 0)
continue;
vtMemFree(up->group[i]);
up->group[i] = vtStrDup(p);
ubox.box->len += d;
break;
}
}
uboxRemUser(ubox.box, u);
vtMemFree(u->uname);
u->uname = vtStrDup(p);
uboxAddUser(ubox.box, u);
}
else if(argv[0][0] == '='){
if(u == nil){
vtUnlock(ubox.lock);
return 0;
}
if((up = _userByUname(ubox.box, &argv[0][1])) == nil){
if(argv[0][1] != '\0'){
vtUnlock(ubox.lock);
return 0;
}
}
if(u->leader != nil){
ubox.box->len -= strlen(u->leader);
vtMemFree(u->leader);
u->leader = nil;
}
if(up != nil){
u->leader = vtStrDup(up->uname);
ubox.box->len += strlen(u->leader);
}
}
else if(argv[0][0] == '+'){
if(u == nil){
vtUnlock(ubox.lock);
return 0;
}
if((up = _userByUname(ubox.box, &argv[0][1])) == nil){
vtUnlock(ubox.lock);
return 0;
}
if(!_groupAddMember(ubox.box, u, up->uname)){
vtUnlock(ubox.lock);
return 0;
}
}
else if(argv[0][0] == '-'){
if(u == nil){
vtUnlock(ubox.lock);
return 0;
}
if((up = _userByUname(ubox.box, &argv[0][1])) == nil){
vtUnlock(ubox.lock);
return 0;
}
if(!_groupRemMember(ubox.box, u, up->uname)){
vtUnlock(ubox.lock);
return 0;
}
}
else{
if(u != nil){
vtSetError("uname: uname '%s' already exists",
u->uname);
vtUnlock(ubox.lock);
return 0;
}
uid = argv[0];
if(*uid == ':')
uid++;
if((u = _userByUid(ubox.box, uid)) != nil){
vtSetError("uname: uid '%s' already exists",
u->uid);
vtUnlock(ubox.lock);
return 0;
}
u = userAlloc(uid, uname);
uboxAddUser(ubox.box, u);
if(argv[0][0] != ':'){
// should have an option for the mode and gid
p = smprint(createfmt, uname, uname, uname);
r = cliExec(p);
vtMemFree(p);
if(r == 0){
vtUnlock(ubox.lock);
return 0;
}
}
}
argv++;
}
if(usersFileWrite(ubox.box) == 0){
vtUnlock(ubox.lock);
return 0;
}
if(dflag)
uboxDump(ubox.box);
vtUnlock(ubox.lock);
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;
}