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/*
* Copyright (c) 1997-1999 University of Utah and the Flux Group.
* All rights reserved.
*
* This file is part of the Flux OSKit. The OSKit is free software, also known
* as "open source;" you can redistribute it and/or modify it under the terms
* of the GNU General Public License (GPL), version 2, as published by the Free
* Software Foundation (FSF). To explore alternate licensing terms, contact
* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
*
* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
#include "getproc.h"
#include <oskit/c/assert.h>
#include <oskit/c/string.h>
static pid_t nextpid = 1;
extern struct vnode *rootvnode;
struct ourproc {
struct proc _proc; /* must be first */
struct pcred _pcred;
struct filedesc0 _fd;
struct plimit _plimit;
struct pstats _pstats;
struct ourproc *_next;
};
struct ourproc *next_oproc;
static oskit_error_t newproc(struct proc **procp);
oskit_error_t getproc(struct proc **procp)
{
oskit_principal_t *prin;
oskit_identity_t id;
oskit_error_t ferror;
struct proc *proc;
struct pcred *pcred;
struct ucred *cred;
struct plimit *limit;
int index;
if ((ferror = newproc(&proc)) != 0)
return ferror;
pcred = proc->p_cred;
pcred->p_refcnt = 1;
cred = proc->p_ucred;
/*
* Look to see if the cred is in use. Need a new one if so.
*/
if (cred->cr_ref != 1) {
cred = crget();
if (!cred) {
ferror = OSKIT_ENOMEM;
goto bad;
}
crfree(proc->p_ucred);
proc->p_ucred = cred;
}
ferror = oskit_get_call_context(&oskit_principal_iid, (void *)&prin);
if (!ferror) {
ferror = oskit_principal_getid(prin, &id);
if (ferror) {
oskit_principal_release(prin);
return ferror;
goto bad;
}
if (id.ngroups > NGROUPS) {
FREE(id.groups, M_TEMP);
oskit_principal_release(prin);
ferror = OSKIT_EINVAL;
goto bad;
}
cred->cr_uid = id.uid;
cred->cr_gid = id.gid;
cred->cr_ngroups = id.ngroups;
for (index = 0; index < id.ngroups; index++)
cred->cr_groups[index] = id.groups[index];
pcred->p_ruid = pcred->p_svuid = id.uid;
pcred->p_rgid = pcred->p_svgid = id.gid;
if (id.groups)
FREE(id.groups, M_TEMP);
oskit_principal_release(prin);
}
else {
cred->cr_uid = cred->cr_gid = cred->cr_ngroups = 0;
pcred->p_ruid = pcred->p_svuid = 0;
pcred->p_rgid = pcred->p_svgid = 0;
}
proc->p_fd->fd_refcnt = 1;
proc->p_fd->fd_cmask = 0; /* umask is applied by client. */
proc->p_fd->fd_rdir = rootvnode = 0;
limit = proc->p_limit;
limit->p_refcnt = 1;
limit->p_lflags = 0;
for (index = 0; index < RLIM_NLIMITS; index++)
limit->pl_rlimit[index].rlim_cur =
limit->pl_rlimit[index].rlim_max = RLIM_INFINITY;
memset(proc->p_stats, 0, sizeof(struct pstats));
if (nextpid == 0)
nextpid = 1;
proc->p_pid = nextpid++;
*procp = proc;
curproc = proc;
return 0;
bad:
prfree(proc);
return ferror;
}
/*
* Return a proc structure to the cache.
*/
void prfree(struct proc *proc)
{
struct ourproc *oproc = (struct ourproc *) proc;
oproc->_next = next_oproc;
next_oproc = oproc;
curproc = 0;
}
/*
* Look for a cached proc structure. Otherwise, make a new one.
*/
static oskit_error_t
newproc(struct proc **procp)
{
struct ourproc *oproc;
struct proc *proc;
struct ucred *cred;
struct filedesc0 *fd;
if ((oproc = next_oproc) != NULL) {
next_oproc = oproc->_next;
proc = &oproc->_proc;
assert(proc->p_cred == &oproc->_pcred);
assert(proc->p_limit == &oproc->_plimit);
assert(proc->p_stats == &oproc->_pstats);
assert(proc->p_fd == &oproc->_fd.fd_fd);
*procp = proc;
return 0;
}
oproc = malloc(sizeof *oproc, M_TEMP, M_WAITOK);
if (!oproc)
return OSKIT_ENOMEM;
memset(oproc, 0, sizeof *oproc);
proc = &oproc->_proc;
cred = crget();
if (!cred) {
free(oproc, M_TEMP);
return OSKIT_ENOMEM;
}
proc->p_cred = &oproc->_pcred;
proc->p_limit = &oproc->_plimit;
proc->p_stats = &oproc->_pstats;
proc->p_ucred = cred;
fd = &oproc->_fd;
fd->fd_fd.fd_nfiles = NDFILE;
fd->fd_fd.fd_ofileflags = fd->fd_dfileflags;
fd->fd_fd.fd_ofiles = fd->fd_dfiles;
proc->p_fd = &fd->fd_fd;
*procp = proc;
return 0;
}
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