static long
exacct(int code, idtype_t idtype, id_t id, void *buf, size_t bufsize,
int flags)
{
if (secpolicy_acct(CRED()) != 0)
return (set_errno(EPERM));
if (exacct_zone_key == ZONE_KEY_UNINITIALIZED)
return (set_errno(ENOTACTIVE));
switch (code) {
case 0:
return (getacct(idtype, id, buf, bufsize));
case 1:
return (putacct(idtype, id, buf, bufsize, flags));
case 2:
return (wracct(idtype, id, flags));
default:
return (set_errno(EINVAL));
}
}
/*
* Perform process accounting functions.
*/
int
sysacct(char *fname)
{
struct acct_globals *ag;
struct vnode *vp;
int error = 0;
if (secpolicy_acct(CRED()) != 0)
return (set_errno(EPERM));
ag = zone_getspecific(acct_zone_key, curproc->p_zone);
ASSERT(ag != NULL);
if (fname == NULL) {
/*
* Close the file and stop accounting.
*/
mutex_enter(&ag->aclock);
vp = ag->acctvp;
ag->acctvp = NULL;
mutex_exit(&ag->aclock);
if (vp) {
error = VOP_CLOSE(vp, FWRITE, 1, (offset_t)0, CRED(),
NULL);
VN_RELE(vp);
}
return (error == 0 ? 0 : set_errno(error));
}
/*
* Either (a) open a new file and begin accounting -or- (b)
* switch accounting from an old to a new file.
*
* (Open the file without holding aclock in case it
* sleeps (holding the lock prevents process exit).)
*/
if ((error = vn_open(fname, UIO_USERSPACE, FWRITE,
0, &vp, (enum create)0, 0)) != 0) {
/* SVID compliance */
if (error == EISDIR)
error = EACCES;
return (set_errno(error));
}
if (vp->v_type != VREG) {
error = EACCES;
} else {
mutex_enter(&acct_list_lock);
if (acct_find(vp, B_FALSE)) {
error = EBUSY;
} else {
mutex_enter(&ag->aclock);
if (ag->acctvp) {
vnode_t *oldvp;
/*
* close old acctvp, and point acct()
* at new file by swapping vp and acctvp
*/
oldvp = ag->acctvp;
ag->acctvp = vp;
vp = oldvp;
} else {
/*
* no existing file, start accounting ..
*/
ag->acctvp = vp;
vp = NULL;
}
mutex_exit(&ag->aclock);
}
mutex_exit(&acct_list_lock);
}
if (vp) {
(void) VOP_CLOSE(vp, FWRITE, 1, (offset_t)0, CRED(), NULL);
VN_RELE(vp);
}
return (error == 0 ? 0 : set_errno(error));
}
