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freebsd-nq/sys/svr4/svr4_misc.c
Alfred Perlstein c636255150 fix races in the uidinfo subsystem, several problems existed: 
1) while allocating a uidinfo struct malloc is called with M_WAITOK,
   it's possible that while asleep another process by the same user
   could have woken up earlier and inserted an entry into the uid
   hash table.  Having redundant entries causes inconsistancies that
   we can't handle.

   fix: do a non-waiting malloc, and if that fails then do a blocking
   malloc, after waking up check that no one else has inserted an entry
   for us already.

2) Because many checks for sbsize were done as "test then set" in a non
   atomic manner it was possible to exceed the limits put up via races.

   fix: instead of querying the count then setting, we just attempt to
   set the count and leave it up to the function to return success or
   failure.

3) The uidinfo code was inlining and repeating, lookups and insertions
   and deletions needed to be in their own functions for clarity.

Reviewed by: green
2000-06-22 22:27:16 +00:00

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/*
* Copyright (c) 1998 Mark Newton
* Copyright (c) 1994 Christos Zoulas
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* SVR4 compatibility module.
*
* SVR4 system calls that are implemented differently in BSD are
* handled here.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/dirent.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/kernel.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/resource.h>
#include <sys/resourcevar.h>
#include <sys/vnode.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <sys/times.h>
#include <sys/fcntl.h>
#include <sys/sem.h>
#include <sys/msg.h>
#include <sys/ptrace.h>
#include <sys/sysproto.h>
#include <svr4/svr4.h>
#include <svr4/svr4_types.h>
#include <svr4/svr4_signal.h>
#include <svr4/svr4_proto.h>
#include <svr4/svr4_util.h>
#include <svr4/svr4_sysconfig.h>
#include <svr4/svr4_dirent.h>
#include <svr4/svr4_acl.h>
#include <svr4/svr4_ulimit.h>
#include <svr4/svr4_statvfs.h>
#include <svr4/svr4_hrt.h>
#include <svr4/svr4_mman.h>
#include <svr4/svr4_wait.h>
#include <machine/vmparam.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_map.h>
#if defined(NetBSD)
# if defined(UVM)
# include <uvm/uvm_extern.h>
# endif
#endif
#define BSD_DIRENT(cp) ((struct dirent *)(cp))
static int svr4_mknod __P((struct proc *, register_t *, char *,
svr4_mode_t, svr4_dev_t));
static __inline clock_t timeval_to_clock_t __P((struct timeval *));
static int svr4_setinfo __P((struct proc *, int, svr4_siginfo_t *));
struct svr4_hrtcntl_args;
static int svr4_hrtcntl __P((struct proc *, struct svr4_hrtcntl_args *,
register_t *));
static void bsd_statfs_to_svr4_statvfs __P((const struct statfs *,
struct svr4_statvfs *));
static void bsd_statfs_to_svr4_statvfs64 __P((const struct statfs *,
struct svr4_statvfs64 *));
static struct proc *svr4_pfind __P((pid_t pid));
/* BOGUS noop */
#if defined(BOGUS)
int
svr4_sys_setitimer(p, uap)
register struct proc *p;
struct svr4_sys_setitimer_args *uap;
{
p->p_retval[0] = 0;
return 0;
}
#endif
int
svr4_sys_wait(p, uap)
struct proc *p;
struct svr4_sys_wait_args *uap;
{
struct wait_args w4;
int error, *retval = p->p_retval, st, sig;
size_t sz = sizeof(*SCARG(&w4, status));
SCARG(&w4, rusage) = NULL;
SCARG(&w4, options) = 0;
if (SCARG(uap, status) == NULL) {
caddr_t sg = stackgap_init();
SCARG(&w4, status) = stackgap_alloc(&sg, sz);
}
else
SCARG(&w4, status) = SCARG(uap, status);
SCARG(&w4, pid) = WAIT_ANY;
if ((error = wait4(p, &w4)) != 0)
return error;
if ((error = copyin(SCARG(&w4, status), &st, sizeof(st))) != 0)
return error;
if (WIFSIGNALED(st)) {
sig = WTERMSIG(st);
if (sig >= 0 && sig < NSIG)
st = (st & ~0177) | SVR4_BSD2SVR4_SIG(sig);
} else if (WIFSTOPPED(st)) {
sig = WSTOPSIG(st);
if (sig >= 0 && sig < NSIG)
st = (st & ~0xff00) | (SVR4_BSD2SVR4_SIG(sig) << 8);
}
/*
* It looks like wait(2) on svr4/solaris/2.4 returns
* the status in retval[1], and the pid on retval[0].
*/
retval[1] = st;
if (SCARG(uap, status))
if ((error = copyout(&st, SCARG(uap, status), sizeof(st))) != 0)
return error;
return 0;
}
int
svr4_sys_execv(p, uap)
struct proc *p;
struct svr4_sys_execv_args *uap;
{
struct execve_args ap;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(p, &sg, SCARG(uap, path));
SCARG(&ap, fname) = SCARG(uap, path);
SCARG(&ap, argv) = SCARG(uap, argp);
SCARG(&ap, envv) = NULL;
return execve(p, &ap);
}
int
svr4_sys_execve(p, uap)
struct proc *p;
struct svr4_sys_execve_args *uap;
{
struct execve_args ap;
caddr_t sg;
sg = stackgap_init();
CHECKALTEXIST(p, &sg, uap->path);
SCARG(&ap, fname) = SCARG(uap, path);
SCARG(&ap, argv) = SCARG(uap, argp);
SCARG(&ap, envv) = SCARG(uap, envp);
return execve(p, &ap);
}
int
svr4_sys_time(p, v)
struct proc *p;
struct svr4_sys_time_args *v;
{
struct svr4_sys_time_args *uap = v;
int error = 0;
struct timeval tv;
microtime(&tv);
if (SCARG(uap, t))
error = copyout(&tv.tv_sec, SCARG(uap, t),
sizeof(*(SCARG(uap, t))));
p->p_retval[0] = (int) tv.tv_sec;
return error;
}
/*
* Read SVR4-style directory entries. We suck them into kernel space so
* that they can be massaged before being copied out to user code.
*
* This code is ported from the Linux emulator: Changes to the VFS interface
* between FreeBSD and NetBSD have made it simpler to port it from there than
* to adapt the NetBSD version.
*/
int
svr4_sys_getdents64(p, uap)
struct proc *p;
struct svr4_sys_getdents64_args *uap;
{
register struct dirent *bdp;
struct vnode *vp;
caddr_t inp, buf; /* BSD-format */
int len, reclen; /* BSD-format */
caddr_t outp; /* SVR4-format */
int resid, svr4reclen=0; /* SVR4-format */
struct file *fp;
struct uio auio;
struct iovec aiov;
struct vattr va;
off_t off;
struct svr4_dirent64 svr4_dirent;
int buflen, error, eofflag, nbytes, justone;
u_long *cookies = NULL, *cookiep;
int ncookies;
DPRINTF(("svr4_sys_getdents64(%d, *, %d)\n",
p->p_pid, SCARG(uap, fd), SCARG(uap, nbytes)));
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) {
return (error);
}
if ((fp->f_flag & FREAD) == 0)
return (EBADF);
vp = (struct vnode *) fp->f_data;
if (vp->v_type != VDIR)
return (EINVAL);
if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) {
return error;
}
nbytes = SCARG(uap, nbytes);
if (nbytes == 1) {
nbytes = sizeof (struct svr4_dirent64);
justone = 1;
}
else
justone = 0;
off = fp->f_offset;
#define DIRBLKSIZ 512 /* XXX we used to use ufs's DIRBLKSIZ */
buflen = max(DIRBLKSIZ, nbytes);
buflen = min(buflen, MAXBSIZE);
buf = malloc(buflen, M_TEMP, M_WAITOK);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
again:
aiov.iov_base = buf;
aiov.iov_len = buflen;
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
auio.uio_rw = UIO_READ;
auio.uio_segflg = UIO_SYSSPACE;
auio.uio_procp = p;
auio.uio_resid = buflen;
auio.uio_offset = off;
if (cookies) {
free(cookies, M_TEMP);
cookies = NULL;
}
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag,
&ncookies, &cookies);
if (error) {
goto out;
}
inp = buf;
outp = (caddr_t) SCARG(uap, dp);
resid = nbytes;
if ((len = buflen - auio.uio_resid) <= 0) {
goto eof;
}
cookiep = cookies;
if (cookies) {
/*
* When using cookies, the vfs has the option of reading from
* a different offset than that supplied (UFS truncates the
* offset to a block boundary to make sure that it never reads
* partway through a directory entry, even if the directory
* has been compacted).
*/
while (len > 0 && ncookies > 0 && *cookiep <= off) {
bdp = (struct dirent *) inp;
len -= bdp->d_reclen;
inp += bdp->d_reclen;
cookiep++;
ncookies--;
}
}
while (len > 0) {
if (cookiep && ncookies == 0)
break;
bdp = (struct dirent *) inp;
reclen = bdp->d_reclen;
if (reclen & 3) {
DPRINTF(("svr4_readdir: reclen=%d\n", reclen));
error = EFAULT;
goto out;
}
if (bdp->d_fileno == 0) {
inp += reclen;
if (cookiep) {
off = *cookiep++;
ncookies--;
} else
off += reclen;
len -= reclen;
continue;
}
svr4reclen = SVR4_RECLEN(&svr4_dirent, bdp->d_namlen);
if (reclen > len || resid < svr4reclen) {
outp++;
break;
}
svr4_dirent.d_ino = (long) bdp->d_fileno;
if (justone) {
/*
* old svr4-style readdir usage.
*/
svr4_dirent.d_off = (svr4_off_t) svr4reclen;
svr4_dirent.d_reclen = (u_short) bdp->d_namlen;
} else {
svr4_dirent.d_off = (svr4_off_t)(off + reclen);
svr4_dirent.d_reclen = (u_short) svr4reclen;
}
strcpy(svr4_dirent.d_name, bdp->d_name);
if ((error = copyout((caddr_t)&svr4_dirent, outp, svr4reclen)))
goto out;
inp += reclen;
if (cookiep) {
off = *cookiep++;
ncookies--;
} else
off += reclen;
outp += svr4reclen;
resid -= svr4reclen;
len -= reclen;
if (justone)
break;
}
if (outp == (caddr_t) SCARG(uap, dp))
goto again;
fp->f_offset = off;
if (justone)
nbytes = resid + svr4reclen;
eof:
p->p_retval[0] = nbytes - resid;
out:
if (cookies)
free(cookies, M_TEMP);
VOP_UNLOCK(vp, 0, p);
free(buf, M_TEMP);
return error;
}
int
svr4_sys_getdents(p, uap)
struct proc *p;
struct svr4_sys_getdents_args *uap;
{
struct dirent *bdp;
struct vnode *vp;
caddr_t inp, buf; /* BSD-format */
int len, reclen; /* BSD-format */
caddr_t outp; /* SVR4-format */
int resid, svr4_reclen; /* SVR4-format */
struct file *fp;
struct uio auio;
struct iovec aiov;
struct svr4_dirent idb;
off_t off; /* true file offset */
int buflen, error, eofflag;
u_long *cookiebuf = NULL, *cookie;
int ncookies = 0, *retval = p->p_retval;
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
return (error);
if ((fp->f_flag & FREAD) == 0)
return (EBADF);
vp = (struct vnode *)fp->f_data;
if (vp->v_type != VDIR)
return (EINVAL);
buflen = min(MAXBSIZE, SCARG(uap, nbytes));
buf = malloc(buflen, M_TEMP, M_WAITOK);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
off = fp->f_offset;
again:
aiov.iov_base = buf;
aiov.iov_len = buflen;
auio.uio_iov = &aiov;
auio.uio_iovcnt = 1;
auio.uio_rw = UIO_READ;
auio.uio_segflg = UIO_SYSSPACE;
auio.uio_procp = p;
auio.uio_resid = buflen;
auio.uio_offset = off;
/*
* First we read into the malloc'ed buffer, then
* we massage it into user space, one record at a time.
*/
error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies,
&cookiebuf);
if (error)
goto out;
inp = buf;
outp = SCARG(uap, buf);
resid = SCARG(uap, nbytes);
if ((len = buflen - auio.uio_resid) == 0)
goto eof;
for (cookie = cookiebuf; len > 0; len -= reclen) {
bdp = (struct dirent *)inp;
reclen = bdp->d_reclen;
if (reclen & 3)
panic("svr4_sys_getdents64: bad reclen");
off = *cookie++; /* each entry points to the next */
if ((off >> 32) != 0) {
uprintf("svr4_sys_getdents64: dir offset too large for emulated program");
error = EINVAL;
goto out;
}
if (bdp->d_fileno == 0) {
inp += reclen; /* it is a hole; squish it out */
continue;
}
svr4_reclen = SVR4_RECLEN(&idb, bdp->d_namlen);
if (reclen > len || resid < svr4_reclen) {
/* entry too big for buffer, so just stop */
outp++;
break;
}
/*
* Massage in place to make a SVR4-shaped dirent (otherwise
* we have to worry about touching user memory outside of
* the copyout() call).
*/
idb.d_ino = (svr4_ino_t)bdp->d_fileno;
idb.d_off = (svr4_off_t)off;
idb.d_reclen = (u_short)svr4_reclen;
strcpy(idb.d_name, bdp->d_name);
if ((error = copyout((caddr_t)&idb, outp, svr4_reclen)))
goto out;
/* advance past this real entry */
inp += reclen;
/* advance output past SVR4-shaped entry */
outp += svr4_reclen;
resid -= svr4_reclen;
}
/* if we squished out the whole block, try again */
if (outp == SCARG(uap, buf))
goto again;
fp->f_offset = off; /* update the vnode offset */
eof:
*retval = SCARG(uap, nbytes) - resid;
out:
VOP_UNLOCK(vp, 0, p);
if (cookiebuf)
free(cookiebuf, M_TEMP);
free(buf, M_TEMP);
return error;
}
int
svr4_sys_mmap(p, uap)
struct proc *p;
struct svr4_sys_mmap_args *uap;
{
struct mmap_args mm;
int *retval;
retval = p->p_retval;
#define _MAP_NEW 0x80000000
/*
* Verify the arguments.
*/
if (SCARG(uap, prot) & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
return EINVAL; /* XXX still needed? */
if (SCARG(uap, len) == 0)
return EINVAL;
SCARG(&mm, prot) = SCARG(uap, prot);
SCARG(&mm, len) = SCARG(uap, len);
SCARG(&mm, flags) = SCARG(uap, flags) & ~_MAP_NEW;
SCARG(&mm, fd) = SCARG(uap, fd);
SCARG(&mm, addr) = SCARG(uap, addr);
SCARG(&mm, pos) = SCARG(uap, pos);
return mmap(p, &mm);
}
int
svr4_sys_mmap64(p, uap)
struct proc *p;
struct svr4_sys_mmap64_args *uap;
{
struct mmap_args mm;
void *rp;
#define _MAP_NEW 0x80000000
/*
* Verify the arguments.
*/
if (SCARG(uap, prot) & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
return EINVAL; /* XXX still needed? */
if (SCARG(uap, len) == 0)
return EINVAL;
SCARG(&mm, prot) = SCARG(uap, prot);
SCARG(&mm, len) = SCARG(uap, len);
SCARG(&mm, flags) = SCARG(uap, flags) & ~_MAP_NEW;
SCARG(&mm, fd) = SCARG(uap, fd);
SCARG(&mm, addr) = SCARG(uap, addr);
SCARG(&mm, pos) = SCARG(uap, pos);
rp = (void *) round_page((vm_offset_t)(p->p_vmspace->vm_daddr + MAXDSIZ));
if ((SCARG(&mm, flags) & MAP_FIXED) == 0 &&
SCARG(&mm, addr) != 0 && (void *)SCARG(&mm, addr) < rp)
SCARG(&mm, addr) = rp;
return mmap(p, &mm);
}
int
svr4_sys_fchroot(p, uap)
struct proc *p;
struct svr4_sys_fchroot_args *uap;
{
struct filedesc *fdp = p->p_fd;
struct vnode *vp;
struct file *fp;
int error;
if ((error = suser(p)) != 0)
return error;
if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0)
return error;
vp = (struct vnode *) fp->f_data;
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
if (vp->v_type != VDIR)
error = ENOTDIR;
else
error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p);
VOP_UNLOCK(vp, 0, p);
if (error)
return error;
VREF(vp);
if (fdp->fd_rdir != NULL)
vrele(fdp->fd_rdir);
fdp->fd_rdir = vp;
return 0;
}
static int
svr4_mknod(p, retval, path, mode, dev)
struct proc *p;
register_t *retval;
char *path;
svr4_mode_t mode;
svr4_dev_t dev;
{
caddr_t sg = stackgap_init();
CHECKALTEXIST(p, &sg, path);
if (S_ISFIFO(mode)) {
struct mkfifo_args ap;
SCARG(&ap, path) = path;
SCARG(&ap, mode) = mode;
return mkfifo(p, &ap);
} else {
struct mknod_args ap;
SCARG(&ap, path) = path;
SCARG(&ap, mode) = mode;
SCARG(&ap, dev) = dev;
return mknod(p, &ap);
}
}
int
svr4_sys_mknod(p, uap)
register struct proc *p;
struct svr4_sys_mknod_args *uap;
{
int *retval = p->p_retval;
return svr4_mknod(p, retval,
SCARG(uap, path), SCARG(uap, mode),
(svr4_dev_t)svr4_to_bsd_odev_t(SCARG(uap, dev)));
}
int
svr4_sys_xmknod(p, uap)
struct proc *p;
struct svr4_sys_xmknod_args *uap;
{
int *retval = p->p_retval;
return svr4_mknod(p, retval,
SCARG(uap, path), SCARG(uap, mode),
(svr4_dev_t)svr4_to_bsd_dev_t(SCARG(uap, dev)));
}
int
svr4_sys_vhangup(p, uap)
struct proc *p;
struct svr4_sys_vhangup_args *uap;
{
return 0;
}
int
svr4_sys_sysconfig(p, uap)
struct proc *p;
struct svr4_sys_sysconfig_args *uap;
{
int *retval;
retval = &(p->p_retval[0]);
switch (SCARG(uap, name)) {
case SVR4_CONFIG_UNUSED:
*retval = 0;
break;
case SVR4_CONFIG_NGROUPS:
*retval = NGROUPS_MAX;
break;
case SVR4_CONFIG_CHILD_MAX:
*retval = maxproc;
break;
case SVR4_CONFIG_OPEN_FILES:
*retval = maxfiles;
break;
case SVR4_CONFIG_POSIX_VER:
*retval = 198808;
break;
case SVR4_CONFIG_PAGESIZE:
*retval = PAGE_SIZE;
break;
case SVR4_CONFIG_CLK_TCK:
*retval = 60; /* should this be `hz', ie. 100? */
break;
case SVR4_CONFIG_XOPEN_VER:
*retval = 2; /* XXX: What should that be? */
break;
case SVR4_CONFIG_PROF_TCK:
*retval = 60; /* XXX: What should that be? */
break;
case SVR4_CONFIG_NPROC_CONF:
*retval = 1; /* Only one processor for now */
break;
case SVR4_CONFIG_NPROC_ONLN:
*retval = 1; /* And it better be online */
break;
case SVR4_CONFIG_AIO_LISTIO_MAX:
case SVR4_CONFIG_AIO_MAX:
case SVR4_CONFIG_AIO_PRIO_DELTA_MAX:
*retval = 0; /* No aio support */
break;
case SVR4_CONFIG_DELAYTIMER_MAX:
*retval = 0; /* No delaytimer support */
break;
case SVR4_CONFIG_MQ_OPEN_MAX:
*retval = msginfo.msgmni;
break;
case SVR4_CONFIG_MQ_PRIO_MAX:
*retval = 0; /* XXX: Don't know */
break;
case SVR4_CONFIG_RTSIG_MAX:
*retval = 0;
break;
case SVR4_CONFIG_SEM_NSEMS_MAX:
*retval = seminfo.semmni;
break;
case SVR4_CONFIG_SEM_VALUE_MAX:
*retval = seminfo.semvmx;
break;
case SVR4_CONFIG_SIGQUEUE_MAX:
*retval = 0; /* XXX: Don't know */
break;
case SVR4_CONFIG_SIGRT_MIN:
case SVR4_CONFIG_SIGRT_MAX:
*retval = 0; /* No real time signals */
break;
case SVR4_CONFIG_TIMER_MAX:
*retval = 3; /* XXX: real, virtual, profiling */
break;
#if defined(NOTYET)
case SVR4_CONFIG_PHYS_PAGES:
#if defined(UVM)
*retval = uvmexp.free; /* XXX: free instead of total */
#else
*retval = cnt.v_free_count; /* XXX: free instead of total */
#endif
break;
case SVR4_CONFIG_AVPHYS_PAGES:
#if defined(UVM)
*retval = uvmexp.active; /* XXX: active instead of avg */
#else
*retval = cnt.v_active_count; /* XXX: active instead of avg */
#endif
break;
#endif /* NOTYET */
default:
return EINVAL;
}
return 0;
}
extern int swap_pager_full;
/* ARGSUSED */
int
svr4_sys_break(p, uap)
struct proc *p;
struct svr4_sys_break_args *uap;
{
struct vmspace *vm = p->p_vmspace;
vm_offset_t new, old, base, ns;
int rv;
base = round_page((vm_offset_t) vm->vm_daddr);
ns = (vm_offset_t)SCARG(uap, nsize);
new = round_page(ns);
if (new > base) {
if ((new - base) > (unsigned) p->p_rlimit[RLIMIT_DATA].rlim_cur) {
return ENOMEM;
}
if (new >= VM_MAXUSER_ADDRESS) {
return (ENOMEM);
}
} else if (new < base) {
/*
* This is simply an invalid value. If someone wants to
* do fancy address space manipulations, mmap and munmap
* can do most of what the user would want.
*/
return EINVAL;
}
old = base + ctob(vm->vm_dsize);
if (new > old) {
vm_size_t diff;
if (swap_pager_full) {
return (ENOMEM);
}
diff = new - old;
rv = vm_map_find(&vm->vm_map, NULL, 0, &old, diff, FALSE,
VM_PROT_ALL, VM_PROT_ALL, 0);
if (rv != KERN_SUCCESS) {
return (ENOMEM);
}
vm->vm_dsize += btoc(diff);
} else if (new < old) {
rv = vm_map_remove(&vm->vm_map, new, old);
if (rv != KERN_SUCCESS) {
return (ENOMEM);
}
vm->vm_dsize -= btoc(old - new);
}
return (0);
}
static __inline clock_t
timeval_to_clock_t(tv)
struct timeval *tv;
{
return tv->tv_sec * hz + tv->tv_usec / (1000000 / hz);
}
int
svr4_sys_times(p, uap)
struct proc *p;
struct svr4_sys_times_args *uap;
{
int error, *retval = p->p_retval;
struct tms tms;
struct timeval t;
struct rusage *ru;
struct rusage r;
struct getrusage_args ga;
caddr_t sg = stackgap_init();
ru = stackgap_alloc(&sg, sizeof(struct rusage));
SCARG(&ga, who) = RUSAGE_SELF;
SCARG(&ga, rusage) = ru;
error = getrusage(p, &ga);
if (error)
return error;
if ((error = copyin(ru, &r, sizeof r)) != 0)
return error;
tms.tms_utime = timeval_to_clock_t(&r.ru_utime);
tms.tms_stime = timeval_to_clock_t(&r.ru_stime);
SCARG(&ga, who) = RUSAGE_CHILDREN;
error = getrusage(p, &ga);
if (error)
return error;
if ((error = copyin(ru, &r, sizeof r)) != 0)
return error;
tms.tms_cutime = timeval_to_clock_t(&r.ru_utime);
tms.tms_cstime = timeval_to_clock_t(&r.ru_stime);
microtime(&t);
*retval = timeval_to_clock_t(&t);
return copyout(&tms, SCARG(uap, tp), sizeof(tms));
}
int
svr4_sys_ulimit(p, uap)
struct proc *p;
struct svr4_sys_ulimit_args *uap;
{
int *retval = p->p_retval;
switch (SCARG(uap, cmd)) {
case SVR4_GFILLIM:
*retval = p->p_rlimit[RLIMIT_FSIZE].rlim_cur / 512;
if (*retval == -1)
*retval = 0x7fffffff;
return 0;
case SVR4_SFILLIM:
{
int error;
struct __setrlimit_args srl;
struct rlimit krl;
caddr_t sg = stackgap_init();
struct rlimit *url = (struct rlimit *)
stackgap_alloc(&sg, sizeof *url);
krl.rlim_cur = SCARG(uap, newlimit) * 512;
krl.rlim_max = p->p_rlimit[RLIMIT_FSIZE].rlim_max;
error = copyout(&krl, url, sizeof(*url));
if (error)
return error;
SCARG(&srl, which) = RLIMIT_FSIZE;
SCARG(&srl, rlp) = (struct orlimit *)url;
error = setrlimit(p, &srl);
if (error)
return error;
*retval = p->p_rlimit[RLIMIT_FSIZE].rlim_cur;
if (*retval == -1)
*retval = 0x7fffffff;
return 0;
}
case SVR4_GMEMLIM:
{
struct vmspace *vm = p->p_vmspace;
register_t r = p->p_rlimit[RLIMIT_DATA].rlim_cur;
if (r == -1)
r = 0x7fffffff;
r += (long) vm->vm_daddr;
if (r < 0)
r = 0x7fffffff;
*retval = r;
return 0;
}
case SVR4_GDESLIM:
*retval = p->p_rlimit[RLIMIT_NOFILE].rlim_cur;
if (*retval == -1)
*retval = 0x7fffffff;
return 0;
default:
return EINVAL;
}
}
static struct proc *
svr4_pfind(pid)
pid_t pid;
{
struct proc *p;
/* look in the live processes */
if ((p = pfind(pid)) != NULL)
return p;
/* look in the zombies */
for (p = zombproc.lh_first; p != 0; p = p->p_list.le_next)
if (p->p_pid == pid)
return p;
return NULL;
}
int
svr4_sys_pgrpsys(p, uap)
struct proc *p;
struct svr4_sys_pgrpsys_args *uap;
{
int *retval = p->p_retval;
switch (SCARG(uap, cmd)) {
case 1: /* setpgrp() */
/*
* SVR4 setpgrp() (which takes no arguments) has the
* semantics that the session ID is also created anew, so
* in almost every sense, setpgrp() is identical to
* setsid() for SVR4. (Under BSD, the difference is that
* a setpgid(0,0) will not create a new session.)
*/
setsid(p, NULL);
/*FALLTHROUGH*/
case 0: /* getpgrp() */
*retval = p->p_pgrp->pg_id;
return 0;
case 2: /* getsid(pid) */
if (SCARG(uap, pid) != 0 &&
(p = svr4_pfind(SCARG(uap, pid))) == NULL)
return ESRCH;
/*
* This has already been initialized to the pid of
* the session leader.
*/
*retval = (register_t) p->p_session->s_leader->p_pid;
return 0;
case 3: /* setsid() */
return setsid(p, NULL);
case 4: /* getpgid(pid) */
if (SCARG(uap, pid) != 0 &&
(p = svr4_pfind(SCARG(uap, pid))) == NULL)
return ESRCH;
*retval = (int) p->p_pgrp->pg_id;
return 0;
case 5: /* setpgid(pid, pgid); */
{
struct setpgid_args sa;
SCARG(&sa, pid) = SCARG(uap, pid);
SCARG(&sa, pgid) = SCARG(uap, pgid);
return setpgid(p, &sa);
}
default:
return EINVAL;
}
}
#define syscallarg(x) union { x datum; register_t pad; }
struct svr4_hrtcntl_args {
int cmd;
int fun;
int clk;
svr4_hrt_interval_t * iv;
svr4_hrt_time_t * ti;
};
static int
svr4_hrtcntl(p, uap, retval)
struct proc *p;
struct svr4_hrtcntl_args *uap;
register_t *retval;
{
switch (SCARG(uap, fun)) {
case SVR4_HRT_CNTL_RES:
DPRINTF(("htrcntl(RES)\n"));
*retval = SVR4_HRT_USEC;
return 0;
case SVR4_HRT_CNTL_TOFD:
DPRINTF(("htrcntl(TOFD)\n"));
{
struct timeval tv;
svr4_hrt_time_t t;
if (SCARG(uap, clk) != SVR4_HRT_CLK_STD) {
DPRINTF(("clk == %d\n", SCARG(uap, clk)));
return EINVAL;
}
if (SCARG(uap, ti) == NULL) {
DPRINTF(("ti NULL\n"));
return EINVAL;
}
microtime(&tv);
t.h_sec = tv.tv_sec;
t.h_rem = tv.tv_usec;
t.h_res = SVR4_HRT_USEC;
return copyout(&t, SCARG(uap, ti), sizeof(t));
}
case SVR4_HRT_CNTL_START:
DPRINTF(("htrcntl(START)\n"));
return ENOSYS;
case SVR4_HRT_CNTL_GET:
DPRINTF(("htrcntl(GET)\n"));
return ENOSYS;
default:
DPRINTF(("Bad htrcntl command %d\n", SCARG(uap, fun)));
return ENOSYS;
}
}
int
svr4_sys_hrtsys(p, uap)
struct proc *p;
struct svr4_sys_hrtsys_args *uap;
{
int *retval = p->p_retval;
switch (SCARG(uap, cmd)) {
case SVR4_HRT_CNTL:
return svr4_hrtcntl(p, (struct svr4_hrtcntl_args *) uap,
retval);
case SVR4_HRT_ALRM:
DPRINTF(("hrtalarm\n"));
return ENOSYS;
case SVR4_HRT_SLP:
DPRINTF(("hrtsleep\n"));
return ENOSYS;
case SVR4_HRT_CAN:
DPRINTF(("hrtcancel\n"));
return ENOSYS;
default:
DPRINTF(("Bad hrtsys command %d\n", SCARG(uap, cmd)));
return EINVAL;
}
}
static int
svr4_setinfo(p, st, s)
struct proc *p;
int st;
svr4_siginfo_t *s;
{
svr4_siginfo_t i;
int sig;
memset(&i, 0, sizeof(i));
i.si_signo = SVR4_SIGCHLD;
i.si_errno = 0; /* XXX? */
if (p) {
i.si_pid = p->p_pid;
if (p->p_stat == SZOMB) {
i.si_stime = p->p_ru->ru_stime.tv_sec;
i.si_utime = p->p_ru->ru_utime.tv_sec;
}
else {
i.si_stime = p->p_stats->p_ru.ru_stime.tv_sec;
i.si_utime = p->p_stats->p_ru.ru_utime.tv_sec;
}
}
if (WIFEXITED(st)) {
i.si_status = WEXITSTATUS(st);
i.si_code = SVR4_CLD_EXITED;
} else if (WIFSTOPPED(st)) {
sig = WSTOPSIG(st);
if (sig >= 0 && sig < NSIG)
i.si_status = SVR4_BSD2SVR4_SIG(sig);
if (i.si_status == SVR4_SIGCONT)
i.si_code = SVR4_CLD_CONTINUED;
else
i.si_code = SVR4_CLD_STOPPED;
} else {
sig = WTERMSIG(st);
if (sig >= 0 && sig < NSIG)
i.si_status = SVR4_BSD2SVR4_SIG(sig);
if (WCOREDUMP(st))
i.si_code = SVR4_CLD_DUMPED;
else
i.si_code = SVR4_CLD_KILLED;
}
DPRINTF(("siginfo [pid %ld signo %d code %d errno %d status %d]\n",
i.si_pid, i.si_signo, i.si_code, i.si_errno, i.si_status));
return copyout(&i, s, sizeof(i));
}
int
svr4_sys_waitsys(p, uap)
struct proc *p;
struct svr4_sys_waitsys_args *uap;
{
int nfound;
int error, *retval = p->p_retval;
struct proc *q, *t;
switch (SCARG(uap, grp)) {
case SVR4_P_PID:
break;
case SVR4_P_PGID:
SCARG(uap, id) = -p->p_pgid;
break;
case SVR4_P_ALL:
SCARG(uap, id) = WAIT_ANY;
break;
default:
return EINVAL;
}
DPRINTF(("waitsys(%d, %d, %p, %x)\n",
SCARG(uap, grp), SCARG(uap, id),
SCARG(uap, info), SCARG(uap, options)));
loop:
nfound = 0;
for (q = p->p_children.lh_first; q != 0; q = q->p_sibling.le_next) {
if (SCARG(uap, id) != WAIT_ANY &&
q->p_pid != SCARG(uap, id) &&
q->p_pgid != -SCARG(uap, id)) {
DPRINTF(("pid %d pgid %d != %d\n", q->p_pid,
q->p_pgid, SCARG(uap, id)));
continue;
}
nfound++;
if (q->p_stat == SZOMB &&
((SCARG(uap, options) & (SVR4_WEXITED|SVR4_WTRAPPED)))) {
*retval = 0;
DPRINTF(("found %d\n", q->p_pid));
if ((error = svr4_setinfo(q, q->p_xstat,
SCARG(uap, info))) != 0)
return error;
if ((SCARG(uap, options) & SVR4_WNOWAIT)) {
DPRINTF(("Don't wait\n"));
return 0;
}
/*
* If we got the child via ptrace(2) or procfs, and
* the parent is different (meaning the process was
* attached, rather than run as a child), then we need
* to give it back to the ol dparent, and send the
* parent a SIGCHLD. The rest of the cleanup will be
* done when the old parent waits on the child.
*/
if ((q->p_flag & P_TRACED) &&
q->p_oppid != q->p_pptr->p_pid) {
t = pfind(q->p_oppid);
proc_reparent(q, t ? t : initproc);
q->p_oppid = 0;
q->p_flag &= ~(P_TRACED | P_WAITED);
wakeup((caddr_t)q->p_pptr);
return 0;
}
q->p_xstat = 0;
ruadd(&p->p_stats->p_cru, q->p_ru);
FREE(q->p_ru, M_ZOMBIE);
/*
* Finally finished with old proc entry.
* Unlink it from its process group and free it.
*/
leavepgrp(q);
LIST_REMOVE(q, p_list); /* off zombproc */
LIST_REMOVE(q, p_sibling);
/*
* Decrement the count of procs running with this uid.
*/
(void)chgproccnt(q->p_cred->p_ruid, -1, 0);
/*
* Free up credentials.
*/
if (--q->p_cred->p_refcnt == 0) {
crfree(q->p_ucred);
FREE(q->p_cred, M_SUBPROC);
}
/*
* Release reference to text vnode
*/
if (q->p_textvp)
vrele(q->p_textvp);
/*
* Give machine-dependent layer a chance
* to free anything that cpu_exit couldn't
* release while still running in process context.
*/
cpu_wait(q);
#if defined(__NetBSD__)
pool_put(&proc_pool, q);
#endif
nprocs--;
return 0;
}
if (q->p_stat == SSTOP && (q->p_flag & P_WAITED) == 0 &&
(q->p_flag & P_TRACED ||
(SCARG(uap, options) & (SVR4_WSTOPPED|SVR4_WCONTINUED)))) {
DPRINTF(("jobcontrol %d\n", q->p_pid));
if (((SCARG(uap, options) & SVR4_WNOWAIT)) == 0)
q->p_flag |= P_WAITED;
*retval = 0;
return svr4_setinfo(q, W_STOPCODE(q->p_xstat),
SCARG(uap, info));
}
}
if (nfound == 0)
return ECHILD;
if (SCARG(uap, options) & SVR4_WNOHANG) {
*retval = 0;
if ((error = svr4_setinfo(NULL, 0, SCARG(uap, info))) != 0)
return error;
return 0;
}
if ((error = tsleep((caddr_t)p, PWAIT | PCATCH, "svr4_wait", 0)) != 0)
return error;
goto loop;
}
static void
bsd_statfs_to_svr4_statvfs(bfs, sfs)
const struct statfs *bfs;
struct svr4_statvfs *sfs;
{
sfs->f_bsize = bfs->f_iosize; /* XXX */
sfs->f_frsize = bfs->f_bsize;
sfs->f_blocks = bfs->f_blocks;
sfs->f_bfree = bfs->f_bfree;
sfs->f_bavail = bfs->f_bavail;
sfs->f_files = bfs->f_files;
sfs->f_ffree = bfs->f_ffree;
sfs->f_favail = bfs->f_ffree;
sfs->f_fsid = bfs->f_fsid.val[0];
memcpy(sfs->f_basetype, bfs->f_fstypename, sizeof(sfs->f_basetype));
sfs->f_flag = 0;
if (bfs->f_flags & MNT_RDONLY)
sfs->f_flag |= SVR4_ST_RDONLY;
if (bfs->f_flags & MNT_NOSUID)
sfs->f_flag |= SVR4_ST_NOSUID;
sfs->f_namemax = MAXNAMLEN;
memcpy(sfs->f_fstr, bfs->f_fstypename, sizeof(sfs->f_fstr)); /* XXX */
memset(sfs->f_filler, 0, sizeof(sfs->f_filler));
}
static void
bsd_statfs_to_svr4_statvfs64(bfs, sfs)
const struct statfs *bfs;
struct svr4_statvfs64 *sfs;
{
sfs->f_bsize = bfs->f_iosize; /* XXX */
sfs->f_frsize = bfs->f_bsize;
sfs->f_blocks = bfs->f_blocks;
sfs->f_bfree = bfs->f_bfree;
sfs->f_bavail = bfs->f_bavail;
sfs->f_files = bfs->f_files;
sfs->f_ffree = bfs->f_ffree;
sfs->f_favail = bfs->f_ffree;
sfs->f_fsid = bfs->f_fsid.val[0];
memcpy(sfs->f_basetype, bfs->f_fstypename, sizeof(sfs->f_basetype));
sfs->f_flag = 0;
if (bfs->f_flags & MNT_RDONLY)
sfs->f_flag |= SVR4_ST_RDONLY;
if (bfs->f_flags & MNT_NOSUID)
sfs->f_flag |= SVR4_ST_NOSUID;
sfs->f_namemax = MAXNAMLEN;
memcpy(sfs->f_fstr, bfs->f_fstypename, sizeof(sfs->f_fstr)); /* XXX */
memset(sfs->f_filler, 0, sizeof(sfs->f_filler));
}
int
svr4_sys_statvfs(p, uap)
struct proc *p;
struct svr4_sys_statvfs_args *uap;
{
struct statfs_args fs_args;
caddr_t sg = stackgap_init();
struct statfs *fs = stackgap_alloc(&sg, sizeof(struct statfs));
struct statfs bfs;
struct svr4_statvfs sfs;
int error;
CHECKALTEXIST(p, &sg, SCARG(uap, path));
SCARG(&fs_args, path) = SCARG(uap, path);
SCARG(&fs_args, buf) = fs;
if ((error = statfs(p, &fs_args)) != 0)
return error;
if ((error = copyin(fs, &bfs, sizeof(bfs))) != 0)
return error;
bsd_statfs_to_svr4_statvfs(&bfs, &sfs);
return copyout(&sfs, SCARG(uap, fs), sizeof(sfs));
}
int
svr4_sys_fstatvfs(p, uap)
struct proc *p;
struct svr4_sys_fstatvfs_args *uap;
{
struct fstatfs_args fs_args;
caddr_t sg = stackgap_init();
struct statfs *fs = stackgap_alloc(&sg, sizeof(struct statfs));
struct statfs bfs;
struct svr4_statvfs sfs;
int error;
SCARG(&fs_args, fd) = SCARG(uap, fd);
SCARG(&fs_args, buf) = fs;
if ((error = fstatfs(p, &fs_args)) != 0)
return error;
if ((error = copyin(fs, &bfs, sizeof(bfs))) != 0)
return error;
bsd_statfs_to_svr4_statvfs(&bfs, &sfs);
return copyout(&sfs, SCARG(uap, fs), sizeof(sfs));
}
int
svr4_sys_statvfs64(p, uap)
struct proc *p;
struct svr4_sys_statvfs64_args *uap;
{
struct statfs_args fs_args;
caddr_t sg = stackgap_init();
struct statfs *fs = stackgap_alloc(&sg, sizeof(struct statfs));
struct statfs bfs;
struct svr4_statvfs64 sfs;
int error;
CHECKALTEXIST(p, &sg, SCARG(uap, path));
SCARG(&fs_args, path) = SCARG(uap, path);
SCARG(&fs_args, buf) = fs;
if ((error = statfs(p, &fs_args)) != 0)
return error;
if ((error = copyin(fs, &bfs, sizeof(bfs))) != 0)
return error;
bsd_statfs_to_svr4_statvfs64(&bfs, &sfs);
return copyout(&sfs, SCARG(uap, fs), sizeof(sfs));
}
int
svr4_sys_fstatvfs64(p, uap)
struct proc *p;
struct svr4_sys_fstatvfs64_args *uap;
{
struct fstatfs_args fs_args;
caddr_t sg = stackgap_init();
struct statfs *fs = stackgap_alloc(&sg, sizeof(struct statfs));
struct statfs bfs;
struct svr4_statvfs64 sfs;
int error;
SCARG(&fs_args, fd) = SCARG(uap, fd);
SCARG(&fs_args, buf) = fs;
if ((error = fstatfs(p, &fs_args)) != 0)
return error;
if ((error = copyin(fs, &bfs, sizeof(bfs))) != 0)
return error;
bsd_statfs_to_svr4_statvfs64(&bfs, &sfs);
return copyout(&sfs, SCARG(uap, fs), sizeof(sfs));
}
int
svr4_sys_alarm(p, uap)
struct proc *p;
struct svr4_sys_alarm_args *uap;
{
int error;
struct itimerval *itp, *oitp;
struct setitimer_args sa;
caddr_t sg = stackgap_init();
itp = stackgap_alloc(&sg, sizeof(*itp));
oitp = stackgap_alloc(&sg, sizeof(*oitp));
timevalclear(&itp->it_interval);
itp->it_value.tv_sec = SCARG(uap, sec);
itp->it_value.tv_usec = 0;
SCARG(&sa, which) = ITIMER_REAL;
SCARG(&sa, itv) = itp;
SCARG(&sa, oitv) = oitp;
error = setitimer(p, &sa);
if (error)
return error;
if (oitp->it_value.tv_usec)
oitp->it_value.tv_sec++;
p->p_retval[0] = oitp->it_value.tv_sec;
return 0;
}
int
svr4_sys_gettimeofday(p, uap)
struct proc *p;
struct svr4_sys_gettimeofday_args *uap;
{
if (SCARG(uap, tp)) {
struct timeval atv;
microtime(&atv);
return copyout(&atv, SCARG(uap, tp), sizeof (atv));
}
return 0;
}
int
svr4_sys_facl(p, uap)
struct proc *p;
struct svr4_sys_facl_args *uap;
{
int *retval;
retval = p->p_retval;
*retval = 0;
switch (SCARG(uap, cmd)) {
case SVR4_SYS_SETACL:
/* We don't support acls on any filesystem */
return ENOSYS;
case SVR4_SYS_GETACL:
return copyout(retval, &SCARG(uap, num),
sizeof(SCARG(uap, num)));
case SVR4_SYS_GETACLCNT:
return 0;
default:
return EINVAL;
}
}
int
svr4_sys_acl(p, uap)
struct proc *p;
struct svr4_sys_acl_args *uap;
{
/* XXX: for now the same */
return svr4_sys_facl(p, (struct svr4_sys_facl_args *)uap);
}
int
svr4_sys_auditsys(p, uap)
struct proc *p;
struct svr4_sys_auditsys_args *uap;
{
/*
* XXX: Big brother is *not* watching.
*/
return 0;
}
int
svr4_sys_memcntl(p, uap)
struct proc *p;
struct svr4_sys_memcntl_args *uap;
{
switch (SCARG(uap, cmd)) {
case SVR4_MC_SYNC:
{
struct msync_args msa;
SCARG(&msa, addr) = SCARG(uap, addr);
SCARG(&msa, len) = SCARG(uap, len);
SCARG(&msa, flags) = (int)SCARG(uap, arg);
return msync(p, &msa);
}
case SVR4_MC_ADVISE:
{
struct madvise_args maa;
SCARG(&maa, addr) = SCARG(uap, addr);
SCARG(&maa, len) = SCARG(uap, len);
SCARG(&maa, behav) = (int)SCARG(uap, arg);
return madvise(p, &maa);
}
case SVR4_MC_LOCK:
case SVR4_MC_UNLOCK:
case SVR4_MC_LOCKAS:
case SVR4_MC_UNLOCKAS:
return EOPNOTSUPP;
default:
return ENOSYS;
}
}
int
svr4_sys_nice(p, uap)
struct proc *p;
struct svr4_sys_nice_args *uap;
{
struct setpriority_args ap;
int error;
SCARG(&ap, which) = PRIO_PROCESS;
SCARG(&ap, who) = 0;
SCARG(&ap, prio) = SCARG(uap, prio);
if ((error = setpriority(p, &ap)) != 0)
return error;
/* the cast is stupid, but the structures are the same */
if ((error = getpriority(p, (struct getpriority_args *)&ap)) != 0)
return error;
return 0;
}
int
svr4_sys_resolvepath(p, uap)
struct proc *p;
struct svr4_sys_resolvepath_args *uap;
{
struct nameidata nd;
int error, *retval = p->p_retval;
NDINIT(&nd, LOOKUP, NOFOLLOW | SAVENAME, UIO_USERSPACE,
SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return error;
if ((error = copyout(nd.ni_cnd.cn_pnbuf, SCARG(uap, buf),
SCARG(uap, bufsiz))) != 0)
goto bad;
*retval = strlen(nd.ni_cnd.cn_pnbuf) < SCARG(uap, bufsiz) ?
strlen(nd.ni_cnd.cn_pnbuf) + 1 : SCARG(uap, bufsiz);
bad:
NDFREE(&nd, NDF_ONLY_PNBUF);
vput(nd.ni_vp);
return error;
}
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