The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/ibcs2/ibcs2_misc.c

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    1 /*-
    2  * Copyright (c) 1995 Steven Wallace
    3  * Copyright (c) 1994, 1995 Scott Bartram
    4  * Copyright (c) 1992, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * This software was developed by the Computer Systems Engineering group
    8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
    9  * contributed to Berkeley.
   10  *
   11  * All advertising materials mentioning features or use of this software
   12  * must display the following acknowledgement:
   13  *      This product includes software developed by the University of
   14  *      California, Lawrence Berkeley Laboratory.
   15  *
   16  * Redistribution and use in source and binary forms, with or without
   17  * modification, are permitted provided that the following conditions
   18  * are met:
   19  * 1. Redistributions of source code must retain the above copyright
   20  *    notice, this list of conditions and the following disclaimer.
   21  * 2. Redistributions in binary form must reproduce the above copyright
   22  *    notice, this list of conditions and the following disclaimer in the
   23  *    documentation and/or other materials provided with the distribution.
   24  * 3. All advertising materials mentioning features or use of this software
   25  *    must display the following acknowledgement:
   26  *      This product includes software developed by the University of
   27  *      California, Berkeley and its contributors.
   28  * 4. Neither the name of the University nor the names of its contributors
   29  *    may be used to endorse or promote products derived from this software
   30  *    without specific prior written permission.
   31  *
   32  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   33  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   34  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   35  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   36  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   40  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   41  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   42  * SUCH DAMAGE.
   43  *
   44  * from: Header: sun_misc.c,v 1.16 93/04/07 02:46:27 torek Exp 
   45  *
   46  *      @(#)sun_misc.c  8.1 (Berkeley) 6/18/93
   47  */
   48 
   49 #include <sys/cdefs.h>
   50 __FBSDID("$FreeBSD: releng/9.2/sys/i386/ibcs2/ibcs2_misc.c 225617 2011-09-16 13:58:51Z kmacy $");
   51 
   52 /*
   53  * IBCS2 compatibility module.
   54  *
   55  * IBCS2 system calls that are implemented differently in BSD are
   56  * handled here.
   57  */
   58 #include <sys/param.h>
   59 #include <sys/systm.h>
   60 #include <sys/capability.h>
   61 #include <sys/dirent.h>
   62 #include <sys/fcntl.h>
   63 #include <sys/filedesc.h>
   64 #include <sys/imgact.h>
   65 #include <sys/kernel.h>
   66 #include <sys/lock.h>
   67 #include <sys/malloc.h>
   68 #include <sys/file.h>                   /* Must come after sys/malloc.h */
   69 #include <sys/mutex.h>
   70 #include <sys/namei.h>
   71 #include <sys/priv.h>
   72 #include <sys/reboot.h>
   73 #include <sys/resourcevar.h>
   74 #include <sys/stat.h>
   75 #include <sys/sysctl.h>
   76 #include <sys/syscallsubr.h>
   77 #include <sys/sysproto.h>
   78 #include <sys/time.h>
   79 #include <sys/times.h>
   80 #include <sys/vnode.h>
   81 #include <sys/wait.h>
   82 
   83 #include <machine/cpu.h>
   84 
   85 #include <i386/ibcs2/ibcs2_dirent.h>
   86 #include <i386/ibcs2/ibcs2_signal.h>
   87 #include <i386/ibcs2/ibcs2_proto.h>
   88 #include <i386/ibcs2/ibcs2_unistd.h>
   89 #include <i386/ibcs2/ibcs2_util.h>
   90 #include <i386/ibcs2/ibcs2_utime.h>
   91 #include <i386/ibcs2/ibcs2_xenix.h>
   92 
   93 #include <security/mac/mac_framework.h>
   94 
   95 int
   96 ibcs2_ulimit(td, uap)
   97         struct thread *td;
   98         struct ibcs2_ulimit_args *uap;
   99 {
  100         struct rlimit rl;
  101         struct proc *p;
  102         int error;
  103 #define IBCS2_GETFSIZE          1
  104 #define IBCS2_SETFSIZE          2
  105 #define IBCS2_GETPSIZE          3
  106 #define IBCS2_GETDTABLESIZE     4
  107 
  108         p = td->td_proc;
  109         switch (uap->cmd) {
  110         case IBCS2_GETFSIZE:
  111                 PROC_LOCK(p);
  112                 td->td_retval[0] = lim_cur(p, RLIMIT_FSIZE);
  113                 PROC_UNLOCK(p);
  114                 if (td->td_retval[0] == -1)
  115                         td->td_retval[0] = 0x7fffffff;
  116                 return 0;
  117         case IBCS2_SETFSIZE:
  118                 PROC_LOCK(p);
  119                 rl.rlim_max = lim_max(p, RLIMIT_FSIZE);
  120                 PROC_UNLOCK(p);
  121                 rl.rlim_cur = uap->newlimit;
  122                 error = kern_setrlimit(td, RLIMIT_FSIZE, &rl);
  123                 if (!error) {
  124                         PROC_LOCK(p);
  125                         td->td_retval[0] = lim_cur(p, RLIMIT_FSIZE);
  126                         PROC_UNLOCK(p);
  127                 } else {
  128                         DPRINTF(("failed "));
  129                 }
  130                 return error;
  131         case IBCS2_GETPSIZE:
  132                 PROC_LOCK(p);
  133                 td->td_retval[0] = lim_cur(p, RLIMIT_RSS); /* XXX */
  134                 PROC_UNLOCK(p);
  135                 return 0;
  136         case IBCS2_GETDTABLESIZE:
  137                 uap->cmd = IBCS2_SC_OPEN_MAX;
  138                 return ibcs2_sysconf(td, (struct ibcs2_sysconf_args *)uap);
  139         default:
  140                 return ENOSYS;
  141         }
  142 }
  143 
  144 #define IBCS2_WSTOPPED       0177
  145 #define IBCS2_STOPCODE(sig)  ((sig) << 8 | IBCS2_WSTOPPED)
  146 int
  147 ibcs2_wait(td, uap)
  148         struct thread *td;
  149         struct ibcs2_wait_args *uap;
  150 {
  151         int error, options, status;
  152         int *statusp;
  153         pid_t pid;
  154         struct trapframe *tf = td->td_frame;
  155         
  156         if ((tf->tf_eflags & (PSL_Z|PSL_PF|PSL_N|PSL_V))
  157             == (PSL_Z|PSL_PF|PSL_N|PSL_V)) {
  158                 /* waitpid */
  159                 pid = uap->a1;
  160                 statusp = (int *)uap->a2;
  161                 options = uap->a3;
  162         } else {
  163                 /* wait */
  164                 pid = WAIT_ANY;
  165                 statusp = (int *)uap->a1;
  166                 options = 0;
  167         }
  168         error = kern_wait(td, pid, &status, options, NULL);
  169         if (error)
  170                 return error;
  171         if (statusp) {
  172                 /*
  173                  * Convert status/signal result.
  174                  */
  175                 if (WIFSTOPPED(status)) {
  176                         if (WSTOPSIG(status) <= 0 ||
  177                             WSTOPSIG(status) > IBCS2_SIGTBLSZ)
  178                                 return (EINVAL);
  179                         status =
  180                           IBCS2_STOPCODE(bsd_to_ibcs2_sig[_SIG_IDX(WSTOPSIG(status))]);
  181                 } else if (WIFSIGNALED(status)) {
  182                         if (WTERMSIG(status) <= 0 ||
  183                             WTERMSIG(status) > IBCS2_SIGTBLSZ)
  184                                 return (EINVAL);
  185                         status = bsd_to_ibcs2_sig[_SIG_IDX(WTERMSIG(status))];
  186                 }
  187                 /* else exit status -- identical */
  188 
  189                 /* record result/status */
  190                 td->td_retval[1] = status;
  191                 return copyout(&status, statusp, sizeof(status));
  192         }
  193 
  194         return 0;
  195 }
  196 
  197 int
  198 ibcs2_execv(td, uap)
  199         struct thread *td;
  200         struct ibcs2_execv_args *uap;
  201 {
  202         struct image_args eargs;
  203         char *path;
  204         int error;
  205 
  206         CHECKALTEXIST(td, uap->path, &path);
  207 
  208         error = exec_copyin_args(&eargs, path, UIO_SYSSPACE, uap->argp, NULL);
  209         free(path, M_TEMP);
  210         if (error == 0)
  211                 error = kern_execve(td, &eargs, NULL);
  212         return (error);
  213 }
  214 
  215 int
  216 ibcs2_execve(td, uap) 
  217         struct thread *td;
  218         struct ibcs2_execve_args *uap;
  219 {
  220         struct image_args eargs;
  221         char *path;
  222         int error;
  223 
  224         CHECKALTEXIST(td, uap->path, &path);
  225 
  226         error = exec_copyin_args(&eargs, path, UIO_SYSSPACE, uap->argp,
  227             uap->envp);
  228         free(path, M_TEMP);
  229         if (error == 0)
  230                 error = kern_execve(td, &eargs, NULL);
  231         return (error);
  232 }
  233 
  234 int
  235 ibcs2_umount(td, uap)
  236         struct thread *td;
  237         struct ibcs2_umount_args *uap;
  238 {
  239         struct unmount_args um;
  240 
  241         um.path = uap->name;
  242         um.flags = 0;
  243         return sys_unmount(td, &um);
  244 }
  245 
  246 int
  247 ibcs2_mount(td, uap)
  248         struct thread *td;
  249         struct ibcs2_mount_args *uap;
  250 {
  251 #ifdef notyet
  252         int oflags = uap->flags, nflags, error;
  253         char fsname[MFSNAMELEN];
  254 
  255         if (oflags & (IBCS2_MS_NOSUB | IBCS2_MS_SYS5))
  256                 return (EINVAL);
  257         if ((oflags & IBCS2_MS_NEWTYPE) == 0)
  258                 return (EINVAL);
  259         nflags = 0;
  260         if (oflags & IBCS2_MS_RDONLY)
  261                 nflags |= MNT_RDONLY;
  262         if (oflags & IBCS2_MS_NOSUID)
  263                 nflags |= MNT_NOSUID;
  264         if (oflags & IBCS2_MS_REMOUNT)
  265                 nflags |= MNT_UPDATE;
  266         uap->flags = nflags;
  267 
  268         if (error = copyinstr((caddr_t)uap->type, fsname, sizeof fsname,
  269                               (u_int *)0))
  270                 return (error);
  271 
  272         if (strcmp(fsname, "4.2") == 0) {
  273                 uap->type = (caddr_t)STACK_ALLOC();
  274                 if (error = copyout("ufs", uap->type, sizeof("ufs")))
  275                         return (error);
  276         } else if (strcmp(fsname, "nfs") == 0) {
  277                 struct ibcs2_nfs_args sna;
  278                 struct sockaddr_in sain;
  279                 struct nfs_args na;
  280                 struct sockaddr sa;
  281 
  282                 if (error = copyin(uap->data, &sna, sizeof sna))
  283                         return (error);
  284                 if (error = copyin(sna.addr, &sain, sizeof sain))
  285                         return (error);
  286                 bcopy(&sain, &sa, sizeof sa);
  287                 sa.sa_len = sizeof(sain);
  288                 uap->data = (caddr_t)STACK_ALLOC();
  289                 na.addr = (struct sockaddr *)((int)uap->data + sizeof na);
  290                 na.sotype = SOCK_DGRAM;
  291                 na.proto = IPPROTO_UDP;
  292                 na.fh = (nfsv2fh_t *)sna.fh;
  293                 na.flags = sna.flags;
  294                 na.wsize = sna.wsize;
  295                 na.rsize = sna.rsize;
  296                 na.timeo = sna.timeo;
  297                 na.retrans = sna.retrans;
  298                 na.hostname = sna.hostname;
  299 
  300                 if (error = copyout(&sa, na.addr, sizeof sa))
  301                         return (error);
  302                 if (error = copyout(&na, uap->data, sizeof na))
  303                         return (error);
  304         }
  305         return (mount(td, uap));
  306 #else
  307         return EINVAL;
  308 #endif
  309 }
  310 
  311 /*
  312  * Read iBCS2-style directory entries.  We suck them into kernel space so
  313  * that they can be massaged before being copied out to user code.  Like
  314  * SunOS, we squish out `empty' entries.
  315  *
  316  * This is quite ugly, but what do you expect from compatibility code?
  317  */
  318 
  319 int
  320 ibcs2_getdents(td, uap)
  321         struct thread *td;
  322         register struct ibcs2_getdents_args *uap;
  323 {
  324         register struct vnode *vp;
  325         register caddr_t inp, buf;      /* BSD-format */
  326         register int len, reclen;       /* BSD-format */
  327         register caddr_t outp;          /* iBCS2-format */
  328         register int resid;             /* iBCS2-format */
  329         struct file *fp;
  330         struct uio auio;
  331         struct iovec aiov;
  332         struct ibcs2_dirent idb;
  333         off_t off;                      /* true file offset */
  334         int buflen, error, eofflag, vfslocked;
  335         u_long *cookies = NULL, *cookiep;
  336         int ncookies;
  337 #define BSD_DIRENT(cp)          ((struct dirent *)(cp))
  338 #define IBCS2_RECLEN(reclen)    (reclen + sizeof(u_short))
  339 
  340         if ((error = getvnode(td->td_proc->p_fd, uap->fd,
  341             CAP_READ | CAP_SEEK, &fp)) != 0)
  342                 return (error);
  343         if ((fp->f_flag & FREAD) == 0) {
  344                 fdrop(fp, td);
  345                 return (EBADF);
  346         }
  347         vp = fp->f_vnode;
  348         vfslocked = VFS_LOCK_GIANT(vp->v_mount);
  349         if (vp->v_type != VDIR) {       /* XXX  vnode readdir op should do this */
  350                 VFS_UNLOCK_GIANT(vfslocked);
  351                 fdrop(fp, td);
  352                 return (EINVAL);
  353         }
  354 
  355         off = fp->f_offset;
  356 #define DIRBLKSIZ       512             /* XXX we used to use ufs's DIRBLKSIZ */
  357         buflen = max(DIRBLKSIZ, uap->nbytes);
  358         buflen = min(buflen, MAXBSIZE);
  359         buf = malloc(buflen, M_TEMP, M_WAITOK);
  360         vn_lock(vp, LK_SHARED | LK_RETRY);
  361 again:
  362         aiov.iov_base = buf;
  363         aiov.iov_len = buflen;
  364         auio.uio_iov = &aiov;
  365         auio.uio_iovcnt = 1;
  366         auio.uio_rw = UIO_READ;
  367         auio.uio_segflg = UIO_SYSSPACE;
  368         auio.uio_td = td;
  369         auio.uio_resid = buflen;
  370         auio.uio_offset = off;
  371 
  372         if (cookies) {
  373                 free(cookies, M_TEMP);
  374                 cookies = NULL;
  375         }
  376 
  377 #ifdef MAC
  378         error = mac_vnode_check_readdir(td->td_ucred, vp);
  379         if (error)
  380                 goto out;
  381 #endif
  382 
  383         /*
  384          * First we read into the malloc'ed buffer, then
  385          * we massage it into user space, one record at a time.
  386          */
  387         if ((error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies, &cookies)) != 0)
  388                 goto out;
  389         inp = buf;
  390         outp = uap->buf;
  391         resid = uap->nbytes;
  392         if ((len = buflen - auio.uio_resid) <= 0)
  393                 goto eof;
  394 
  395         cookiep = cookies;
  396 
  397         if (cookies) {
  398                 /*
  399                  * When using cookies, the vfs has the option of reading from
  400                  * a different offset than that supplied (UFS truncates the
  401                  * offset to a block boundary to make sure that it never reads
  402                  * partway through a directory entry, even if the directory
  403                  * has been compacted).
  404                  */
  405                 while (len > 0 && ncookies > 0 && *cookiep <= off) {
  406                         len -= BSD_DIRENT(inp)->d_reclen;
  407                         inp += BSD_DIRENT(inp)->d_reclen;
  408                         cookiep++;
  409                         ncookies--;
  410                 }
  411         }
  412 
  413         for (; len > 0; len -= reclen) {
  414                 if (cookiep && ncookies == 0)
  415                         break;
  416                 reclen = BSD_DIRENT(inp)->d_reclen;
  417                 if (reclen & 3) {
  418                         printf("ibcs2_getdents: reclen=%d\n", reclen);
  419                         error = EFAULT;
  420                         goto out;
  421                 }
  422                 if (BSD_DIRENT(inp)->d_fileno == 0) {
  423                         inp += reclen;  /* it is a hole; squish it out */
  424                         if (cookiep) {
  425                                 off = *cookiep++;
  426                                 ncookies--;
  427                         } else
  428                                 off += reclen;
  429                         continue;
  430                 }
  431                 if (reclen > len || resid < IBCS2_RECLEN(reclen)) {
  432                         /* entry too big for buffer, so just stop */
  433                         outp++;
  434                         break;
  435                 }
  436                 /*
  437                  * Massage in place to make an iBCS2-shaped dirent (otherwise
  438                  * we have to worry about touching user memory outside of
  439                  * the copyout() call).
  440                  */
  441                 idb.d_ino = (ibcs2_ino_t)BSD_DIRENT(inp)->d_fileno;
  442                 idb.d_off = (ibcs2_off_t)off;
  443                 idb.d_reclen = (u_short)IBCS2_RECLEN(reclen);
  444                 if ((error = copyout((caddr_t)&idb, outp, 10)) != 0 ||
  445                     (error = copyout(BSD_DIRENT(inp)->d_name, outp + 10,
  446                                      BSD_DIRENT(inp)->d_namlen + 1)) != 0)
  447                         goto out;
  448                 /* advance past this real entry */
  449                 if (cookiep) {
  450                         off = *cookiep++;
  451                         ncookies--;
  452                 } else
  453                         off += reclen;
  454                 inp += reclen;
  455                 /* advance output past iBCS2-shaped entry */
  456                 outp += IBCS2_RECLEN(reclen);
  457                 resid -= IBCS2_RECLEN(reclen);
  458         }
  459         /* if we squished out the whole block, try again */
  460         if (outp == uap->buf)
  461                 goto again;
  462         fp->f_offset = off;             /* update the vnode offset */
  463 eof:
  464         td->td_retval[0] = uap->nbytes - resid;
  465 out:
  466         VOP_UNLOCK(vp, 0);
  467         VFS_UNLOCK_GIANT(vfslocked);
  468         fdrop(fp, td);
  469         if (cookies)
  470                 free(cookies, M_TEMP);
  471         free(buf, M_TEMP);
  472         return (error);
  473 }
  474 
  475 int
  476 ibcs2_read(td, uap)
  477         struct thread *td;
  478         struct ibcs2_read_args *uap;
  479 {
  480         register struct vnode *vp;
  481         register caddr_t inp, buf;      /* BSD-format */
  482         register int len, reclen;       /* BSD-format */
  483         register caddr_t outp;          /* iBCS2-format */
  484         register int resid;             /* iBCS2-format */
  485         struct file *fp;
  486         struct uio auio;
  487         struct iovec aiov;
  488         struct ibcs2_direct {
  489                 ibcs2_ino_t ino;
  490                 char name[14];
  491         } idb;
  492         off_t off;                      /* true file offset */
  493         int buflen, error, eofflag, size, vfslocked;
  494         u_long *cookies = NULL, *cookiep;
  495         int ncookies;
  496 
  497         if ((error = getvnode(td->td_proc->p_fd, uap->fd,
  498             CAP_READ | CAP_SEEK, &fp)) != 0) {
  499                 if (error == EINVAL)
  500                         return sys_read(td, (struct read_args *)uap);
  501                 else
  502                         return error;
  503         }
  504         if ((fp->f_flag & FREAD) == 0) {
  505                 fdrop(fp, td);
  506                 return (EBADF);
  507         }
  508         vp = fp->f_vnode;
  509         vfslocked = VFS_LOCK_GIANT(vp->v_mount);
  510         if (vp->v_type != VDIR) {
  511                 VFS_UNLOCK_GIANT(vfslocked);
  512                 fdrop(fp, td);
  513                 return sys_read(td, (struct read_args *)uap);
  514         }
  515 
  516         off = fp->f_offset;
  517 
  518         DPRINTF(("ibcs2_read: read directory\n"));
  519 
  520         buflen = max(DIRBLKSIZ, uap->nbytes);
  521         buflen = min(buflen, MAXBSIZE);
  522         buf = malloc(buflen, M_TEMP, M_WAITOK);
  523         vn_lock(vp, LK_SHARED | LK_RETRY);
  524 again:
  525         aiov.iov_base = buf;
  526         aiov.iov_len = buflen;
  527         auio.uio_iov = &aiov;
  528         auio.uio_iovcnt = 1;
  529         auio.uio_rw = UIO_READ;
  530         auio.uio_segflg = UIO_SYSSPACE;
  531         auio.uio_td = td;
  532         auio.uio_resid = buflen;
  533         auio.uio_offset = off;
  534 
  535         if (cookies) {
  536                 free(cookies, M_TEMP);
  537                 cookies = NULL;
  538         }
  539 
  540 #ifdef MAC
  541         error = mac_vnode_check_readdir(td->td_ucred, vp);
  542         if (error)
  543                 goto out;
  544 #endif
  545 
  546         /*
  547          * First we read into the malloc'ed buffer, then
  548          * we massage it into user space, one record at a time.
  549          */
  550         if ((error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies, &cookies)) != 0) {
  551                 DPRINTF(("VOP_READDIR failed: %d\n", error));
  552                 goto out;
  553         }
  554         inp = buf;
  555         outp = uap->buf;
  556         resid = uap->nbytes;
  557         if ((len = buflen - auio.uio_resid) <= 0)
  558                 goto eof;
  559 
  560         cookiep = cookies;
  561 
  562         if (cookies) {
  563                 /*
  564                  * When using cookies, the vfs has the option of reading from
  565                  * a different offset than that supplied (UFS truncates the
  566                  * offset to a block boundary to make sure that it never reads
  567                  * partway through a directory entry, even if the directory
  568                  * has been compacted).
  569                  */
  570                 while (len > 0 && ncookies > 0 && *cookiep <= off) {
  571                         len -= BSD_DIRENT(inp)->d_reclen;
  572                         inp += BSD_DIRENT(inp)->d_reclen;
  573                         cookiep++;
  574                         ncookies--;
  575                 }
  576         }
  577 
  578         for (; len > 0 && resid > 0; len -= reclen) {
  579                 if (cookiep && ncookies == 0)
  580                         break;
  581                 reclen = BSD_DIRENT(inp)->d_reclen;
  582                 if (reclen & 3) {
  583                         printf("ibcs2_read: reclen=%d\n", reclen);
  584                         error = EFAULT;
  585                         goto out;
  586                 }
  587                 if (BSD_DIRENT(inp)->d_fileno == 0) {
  588                         inp += reclen;  /* it is a hole; squish it out */
  589                         if (cookiep) {
  590                                 off = *cookiep++;
  591                                 ncookies--;
  592                         } else
  593                                 off += reclen;
  594                         continue;
  595                 }
  596                 if (reclen > len || resid < sizeof(struct ibcs2_direct)) {
  597                         /* entry too big for buffer, so just stop */
  598                         outp++;
  599                         break;
  600                 }
  601                 /*
  602                  * Massage in place to make an iBCS2-shaped dirent (otherwise
  603                  * we have to worry about touching user memory outside of
  604                  * the copyout() call).
  605                  *
  606                  * TODO: if length(filename) > 14, then break filename into
  607                  * multiple entries and set inode = 0xffff except last
  608                  */
  609                 idb.ino = (BSD_DIRENT(inp)->d_fileno > 0xfffe) ? 0xfffe :
  610                         BSD_DIRENT(inp)->d_fileno;
  611                 (void)copystr(BSD_DIRENT(inp)->d_name, idb.name, 14, &size);
  612                 bzero(idb.name + size, 14 - size);
  613                 if ((error = copyout(&idb, outp, sizeof(struct ibcs2_direct))) != 0)
  614                         goto out;
  615                 /* advance past this real entry */
  616                 if (cookiep) {
  617                         off = *cookiep++;
  618                         ncookies--;
  619                 } else
  620                         off += reclen;
  621                 inp += reclen;
  622                 /* advance output past iBCS2-shaped entry */
  623                 outp += sizeof(struct ibcs2_direct);
  624                 resid -= sizeof(struct ibcs2_direct);
  625         }
  626         /* if we squished out the whole block, try again */
  627         if (outp == uap->buf)
  628                 goto again;
  629         fp->f_offset = off;             /* update the vnode offset */
  630 eof:
  631         td->td_retval[0] = uap->nbytes - resid;
  632 out:
  633         VOP_UNLOCK(vp, 0);
  634         VFS_UNLOCK_GIANT(vfslocked);
  635         fdrop(fp, td);
  636         if (cookies)
  637                 free(cookies, M_TEMP);
  638         free(buf, M_TEMP);
  639         return (error);
  640 }
  641 
  642 int
  643 ibcs2_mknod(td, uap)
  644         struct thread *td;
  645         struct ibcs2_mknod_args *uap;
  646 {
  647         char *path;
  648         int error;
  649 
  650         CHECKALTCREAT(td, uap->path, &path);
  651         if (S_ISFIFO(uap->mode))
  652                 error = kern_mkfifo(td, path, UIO_SYSSPACE, uap->mode);
  653         else
  654                 error = kern_mknod(td, path, UIO_SYSSPACE, uap->mode, uap->dev);
  655         free(path, M_TEMP);
  656         return (error);
  657 }
  658 
  659 int
  660 ibcs2_getgroups(td, uap)
  661         struct thread *td;
  662         struct ibcs2_getgroups_args *uap;
  663 {
  664         ibcs2_gid_t *iset;
  665         gid_t *gp;
  666         u_int i, ngrp;
  667         int error;
  668 
  669         if (uap->gidsetsize < td->td_ucred->cr_ngroups) {
  670                 if (uap->gidsetsize == 0)
  671                         ngrp = 0;
  672                 else
  673                         return (EINVAL);
  674         } else
  675                 ngrp = td->td_ucred->cr_ngroups;
  676         gp = malloc(ngrp * sizeof(*gp), M_TEMP, M_WAITOK);
  677         error = kern_getgroups(td, &ngrp, gp);
  678         if (error)
  679                 goto out;
  680         if (uap->gidsetsize > 0) {
  681                 iset = malloc(ngrp * sizeof(*iset), M_TEMP, M_WAITOK);
  682                 for (i = 0; i < ngrp; i++)
  683                         iset[i] = (ibcs2_gid_t)gp[i];
  684                 error = copyout(iset, uap->gidset, ngrp * sizeof(ibcs2_gid_t));
  685                 free(iset, M_TEMP);
  686         }
  687         if (error == 0)
  688                 td->td_retval[0] = ngrp;
  689 out:
  690         free(gp, M_TEMP);
  691         return (error);
  692 }
  693 
  694 int
  695 ibcs2_setgroups(td, uap)
  696         struct thread *td;
  697         struct ibcs2_setgroups_args *uap;
  698 {
  699         ibcs2_gid_t *iset;
  700         gid_t *gp;
  701         int error, i;
  702 
  703         if (uap->gidsetsize < 0 || uap->gidsetsize > ngroups_max + 1)
  704                 return (EINVAL);
  705         if (uap->gidsetsize && uap->gidset == NULL)
  706                 return (EINVAL);
  707         gp = malloc(uap->gidsetsize * sizeof(*gp), M_TEMP, M_WAITOK);
  708         if (uap->gidsetsize) {
  709                 iset = malloc(uap->gidsetsize * sizeof(*iset), M_TEMP, M_WAITOK);
  710                 error = copyin(uap->gidset, iset, sizeof(ibcs2_gid_t) *
  711                     uap->gidsetsize);
  712                 if (error) {
  713                         free(iset, M_TEMP);
  714                         goto out;
  715                 }
  716                 for (i = 0; i < uap->gidsetsize; i++)
  717                         gp[i] = (gid_t)iset[i];
  718         }
  719 
  720         error = kern_setgroups(td, uap->gidsetsize, gp);
  721 out:
  722         free(gp, M_TEMP);
  723         return (error);
  724 }
  725 
  726 int
  727 ibcs2_setuid(td, uap)
  728         struct thread *td;
  729         struct ibcs2_setuid_args *uap;
  730 {
  731         struct setuid_args sa;
  732 
  733         sa.uid = (uid_t)uap->uid;
  734         return sys_setuid(td, &sa);
  735 }
  736 
  737 int
  738 ibcs2_setgid(td, uap)
  739         struct thread *td;
  740         struct ibcs2_setgid_args *uap;
  741 {
  742         struct setgid_args sa;
  743 
  744         sa.gid = (gid_t)uap->gid;
  745         return sys_setgid(td, &sa);
  746 }
  747 
  748 int
  749 ibcs2_time(td, uap)
  750         struct thread *td;
  751         struct ibcs2_time_args *uap;
  752 {
  753         struct timeval tv;
  754 
  755         microtime(&tv);
  756         td->td_retval[0] = tv.tv_sec;
  757         if (uap->tp)
  758                 return copyout((caddr_t)&tv.tv_sec, (caddr_t)uap->tp,
  759                                sizeof(ibcs2_time_t));
  760         else
  761                 return 0;
  762 }
  763 
  764 int
  765 ibcs2_pathconf(td, uap)
  766         struct thread *td;
  767         struct ibcs2_pathconf_args *uap;
  768 {
  769         char *path;
  770         int error;
  771 
  772         CHECKALTEXIST(td, uap->path, &path);
  773         uap->name++;    /* iBCS2 _PC_* defines are offset by one */
  774         error = kern_pathconf(td, path, UIO_SYSSPACE, uap->name, FOLLOW);
  775         free(path, M_TEMP);
  776         return (error);
  777 }
  778 
  779 int
  780 ibcs2_fpathconf(td, uap)
  781         struct thread *td;
  782         struct ibcs2_fpathconf_args *uap;
  783 {
  784         uap->name++;    /* iBCS2 _PC_* defines are offset by one */
  785         return sys_fpathconf(td, (struct fpathconf_args *)uap);
  786 }
  787 
  788 int
  789 ibcs2_sysconf(td, uap)
  790         struct thread *td;
  791         struct ibcs2_sysconf_args *uap;
  792 {
  793         int mib[2], value, len, error;
  794         struct proc *p;
  795 
  796         p = td->td_proc;
  797         switch(uap->name) {
  798         case IBCS2_SC_ARG_MAX:
  799                 mib[1] = KERN_ARGMAX;
  800                 break;
  801 
  802         case IBCS2_SC_CHILD_MAX:
  803                 PROC_LOCK(p);
  804                 td->td_retval[0] = lim_cur(td->td_proc, RLIMIT_NPROC);
  805                 PROC_UNLOCK(p);
  806                 return 0;
  807 
  808         case IBCS2_SC_CLK_TCK:
  809                 td->td_retval[0] = hz;
  810                 return 0;
  811 
  812         case IBCS2_SC_NGROUPS_MAX:
  813                 mib[1] = KERN_NGROUPS;
  814                 break;
  815 
  816         case IBCS2_SC_OPEN_MAX:
  817                 PROC_LOCK(p);
  818                 td->td_retval[0] = lim_cur(td->td_proc, RLIMIT_NOFILE);
  819                 PROC_UNLOCK(p);
  820                 return 0;
  821                 
  822         case IBCS2_SC_JOB_CONTROL:
  823                 mib[1] = KERN_JOB_CONTROL;
  824                 break;
  825                 
  826         case IBCS2_SC_SAVED_IDS:
  827                 mib[1] = KERN_SAVED_IDS;
  828                 break;
  829                 
  830         case IBCS2_SC_VERSION:
  831                 mib[1] = KERN_POSIX1;
  832                 break;
  833                 
  834         case IBCS2_SC_PASS_MAX:
  835                 td->td_retval[0] = 128;         /* XXX - should we create PASS_MAX ? */
  836                 return 0;
  837 
  838         case IBCS2_SC_XOPEN_VERSION:
  839                 td->td_retval[0] = 2;           /* XXX: What should that be? */
  840                 return 0;
  841                 
  842         default:
  843                 return EINVAL;
  844         }
  845 
  846         mib[0] = CTL_KERN;
  847         len = sizeof(value);
  848         error = kernel_sysctl(td, mib, 2, &value, &len, NULL, 0, NULL, 0);
  849         if (error)
  850                 return error;
  851         td->td_retval[0] = value;
  852         return 0;
  853 }
  854 
  855 int
  856 ibcs2_alarm(td, uap)
  857         struct thread *td;
  858         struct ibcs2_alarm_args *uap;
  859 {
  860         struct itimerval itv, oitv;
  861         int error;
  862 
  863         timevalclear(&itv.it_interval);
  864         itv.it_value.tv_sec = uap->sec;
  865         itv.it_value.tv_usec = 0;
  866         error = kern_setitimer(td, ITIMER_REAL, &itv, &oitv);
  867         if (error)
  868                 return (error);
  869         if (oitv.it_value.tv_usec != 0)
  870                 oitv.it_value.tv_sec++;
  871         td->td_retval[0] = oitv.it_value.tv_sec;
  872         return (0);
  873 }
  874 
  875 int
  876 ibcs2_times(td, uap)
  877         struct thread *td;
  878         struct ibcs2_times_args *uap;
  879 {
  880         struct rusage ru;
  881         struct timeval t;
  882         struct tms tms;
  883         int error;
  884 
  885 #define CONVTCK(r)      (r.tv_sec * hz + r.tv_usec / (1000000 / hz))
  886 
  887         error = kern_getrusage(td, RUSAGE_SELF, &ru);
  888         if (error)
  889                 return (error);
  890         tms.tms_utime = CONVTCK(ru.ru_utime);
  891         tms.tms_stime = CONVTCK(ru.ru_stime);
  892 
  893         error = kern_getrusage(td, RUSAGE_CHILDREN, &ru);
  894         if (error)
  895                 return (error);
  896         tms.tms_cutime = CONVTCK(ru.ru_utime);
  897         tms.tms_cstime = CONVTCK(ru.ru_stime);
  898 
  899         microtime(&t);
  900         td->td_retval[0] = CONVTCK(t);
  901         
  902         return (copyout(&tms, uap->tp, sizeof(struct tms)));
  903 }
  904 
  905 int
  906 ibcs2_stime(td, uap)
  907         struct thread *td;
  908         struct ibcs2_stime_args *uap;
  909 {
  910         struct timeval tv;
  911         long secs;
  912         int error;
  913 
  914         error = copyin(uap->timep, &secs, sizeof(long));
  915         if (error)
  916                 return (error);
  917         tv.tv_sec = secs;
  918         tv.tv_usec = 0;
  919         error = kern_settimeofday(td, &tv, NULL);
  920         if (error)
  921                 error = EPERM;
  922         return (error);
  923 }
  924 
  925 int
  926 ibcs2_utime(td, uap)
  927         struct thread *td;
  928         struct ibcs2_utime_args *uap;
  929 {
  930         struct ibcs2_utimbuf ubuf;
  931         struct timeval tbuf[2], *tp;
  932         char *path;
  933         int error;
  934 
  935         if (uap->buf) {
  936                 error = copyin(uap->buf, &ubuf, sizeof(ubuf));
  937                 if (error)
  938                         return (error);
  939                 tbuf[0].tv_sec = ubuf.actime;
  940                 tbuf[0].tv_usec = 0;
  941                 tbuf[1].tv_sec = ubuf.modtime;
  942                 tbuf[1].tv_usec = 0;
  943                 tp = tbuf;
  944         } else
  945                 tp = NULL;
  946 
  947         CHECKALTEXIST(td, uap->path, &path);
  948         error = kern_utimes(td, path, UIO_SYSSPACE, tp, UIO_SYSSPACE);
  949         free(path, M_TEMP);
  950         return (error);
  951 }
  952 
  953 int
  954 ibcs2_nice(td, uap)
  955         struct thread *td;
  956         struct ibcs2_nice_args *uap;
  957 {
  958         int error;
  959         struct setpriority_args sa;
  960 
  961         sa.which = PRIO_PROCESS;
  962         sa.who = 0;
  963         sa.prio = td->td_proc->p_nice + uap->incr;
  964         if ((error = sys_setpriority(td, &sa)) != 0)
  965                 return EPERM;
  966         td->td_retval[0] = td->td_proc->p_nice;
  967         return 0;
  968 }
  969 
  970 /*
  971  * iBCS2 getpgrp, setpgrp, setsid, and setpgid
  972  */
  973 
  974 int
  975 ibcs2_pgrpsys(td, uap)
  976         struct thread *td;
  977         struct ibcs2_pgrpsys_args *uap;
  978 {
  979         struct proc *p = td->td_proc;
  980         switch (uap->type) {
  981         case 0:                 /* getpgrp */
  982                 PROC_LOCK(p);
  983                 td->td_retval[0] = p->p_pgrp->pg_id;
  984                 PROC_UNLOCK(p);
  985                 return 0;
  986 
  987         case 1:                 /* setpgrp */
  988             {
  989                 struct setpgid_args sa;
  990 
  991                 sa.pid = 0;
  992                 sa.pgid = 0;
  993                 sys_setpgid(td, &sa);
  994                 PROC_LOCK(p);
  995                 td->td_retval[0] = p->p_pgrp->pg_id;
  996                 PROC_UNLOCK(p);
  997                 return 0;
  998             }
  999 
 1000         case 2:                 /* setpgid */
 1001             {
 1002                 struct setpgid_args sa;
 1003 
 1004                 sa.pid = uap->pid;
 1005                 sa.pgid = uap->pgid;
 1006                 return sys_setpgid(td, &sa);
 1007             }
 1008 
 1009         case 3:                 /* setsid */
 1010                 return sys_setsid(td, NULL);
 1011 
 1012         default:
 1013                 return EINVAL;
 1014         }
 1015 }
 1016 
 1017 /*
 1018  * XXX - need to check for nested calls
 1019  */
 1020 
 1021 int
 1022 ibcs2_plock(td, uap)
 1023         struct thread *td;
 1024         struct ibcs2_plock_args *uap;
 1025 {
 1026         int error;
 1027 #define IBCS2_UNLOCK    0
 1028 #define IBCS2_PROCLOCK  1
 1029 #define IBCS2_TEXTLOCK  2
 1030 #define IBCS2_DATALOCK  4
 1031 
 1032         
 1033         switch(uap->cmd) {
 1034         case IBCS2_UNLOCK:
 1035                 error = priv_check(td, PRIV_VM_MUNLOCK);
 1036                 if (error)
 1037                         return (error);
 1038                 /* XXX - TODO */
 1039                 return (0);
 1040 
 1041         case IBCS2_PROCLOCK:
 1042         case IBCS2_TEXTLOCK:
 1043         case IBCS2_DATALOCK:
 1044                 error = priv_check(td, PRIV_VM_MLOCK);
 1045                 if (error)
 1046                         return (error);
 1047                 /* XXX - TODO */
 1048                 return 0;
 1049         }
 1050         return EINVAL;
 1051 }
 1052 
 1053 int
 1054 ibcs2_uadmin(td, uap)
 1055         struct thread *td;
 1056         struct ibcs2_uadmin_args *uap;
 1057 {
 1058 #define SCO_A_REBOOT        1
 1059 #define SCO_A_SHUTDOWN      2
 1060 #define SCO_A_REMOUNT       4
 1061 #define SCO_A_CLOCK         8
 1062 #define SCO_A_SETCONFIG     128
 1063 #define SCO_A_GETDEV        130
 1064 
 1065 #define SCO_AD_HALT         0
 1066 #define SCO_AD_BOOT         1
 1067 #define SCO_AD_IBOOT        2
 1068 #define SCO_AD_PWRDOWN      3
 1069 #define SCO_AD_PWRNAP       4
 1070 
 1071 #define SCO_AD_PANICBOOT    1
 1072 
 1073 #define SCO_AD_GETBMAJ      0
 1074 #define SCO_AD_GETCMAJ      1
 1075 
 1076         switch(uap->cmd) {
 1077         case SCO_A_REBOOT:
 1078         case SCO_A_SHUTDOWN:
 1079                 switch(uap->func) {
 1080                         struct reboot_args r;
 1081                 case SCO_AD_HALT:
 1082                 case SCO_AD_PWRDOWN:
 1083                 case SCO_AD_PWRNAP:
 1084                         r.opt = RB_HALT;
 1085                         return (sys_reboot(td, &r));
 1086                 case SCO_AD_BOOT:
 1087                 case SCO_AD_IBOOT:
 1088                         r.opt = RB_AUTOBOOT;
 1089                         return (sys_reboot(td, &r));
 1090                 }
 1091                 return EINVAL;
 1092         case SCO_A_REMOUNT:
 1093         case SCO_A_CLOCK:
 1094         case SCO_A_SETCONFIG:
 1095                 return 0;
 1096         case SCO_A_GETDEV:
 1097                 return EINVAL;  /* XXX - TODO */
 1098         }
 1099         return EINVAL;
 1100 }
 1101 
 1102 int
 1103 ibcs2_sysfs(td, uap)
 1104         struct thread *td;
 1105         struct ibcs2_sysfs_args *uap;
 1106 {
 1107 #define IBCS2_GETFSIND        1
 1108 #define IBCS2_GETFSTYP        2
 1109 #define IBCS2_GETNFSTYP       3
 1110 
 1111         switch(uap->cmd) {
 1112         case IBCS2_GETFSIND:
 1113         case IBCS2_GETFSTYP:
 1114         case IBCS2_GETNFSTYP:
 1115                 break;
 1116         }
 1117         return EINVAL;          /* XXX - TODO */
 1118 }
 1119 
 1120 int
 1121 ibcs2_unlink(td, uap)
 1122         struct thread *td;
 1123         struct ibcs2_unlink_args *uap;
 1124 {
 1125         char *path;
 1126         int error;
 1127 
 1128         CHECKALTEXIST(td, uap->path, &path);
 1129         error = kern_unlink(td, path, UIO_SYSSPACE);
 1130         free(path, M_TEMP);
 1131         return (error);
 1132 }
 1133 
 1134 int
 1135 ibcs2_chdir(td, uap)
 1136         struct thread *td;
 1137         struct ibcs2_chdir_args *uap;
 1138 {
 1139         char *path;
 1140         int error;
 1141 
 1142         CHECKALTEXIST(td, uap->path, &path);
 1143         error = kern_chdir(td, path, UIO_SYSSPACE);
 1144         free(path, M_TEMP);
 1145         return (error);
 1146 }
 1147 
 1148 int
 1149 ibcs2_chmod(td, uap)
 1150         struct thread *td;
 1151         struct ibcs2_chmod_args *uap;
 1152 {
 1153         char *path;
 1154         int error;
 1155 
 1156         CHECKALTEXIST(td, uap->path, &path);
 1157         error = kern_chmod(td, path, UIO_SYSSPACE, uap->mode);
 1158         free(path, M_TEMP);
 1159         return (error);
 1160 }
 1161 
 1162 int
 1163 ibcs2_chown(td, uap)
 1164         struct thread *td;
 1165         struct ibcs2_chown_args *uap;
 1166 {
 1167         char *path;
 1168         int error;
 1169 
 1170         CHECKALTEXIST(td, uap->path, &path);
 1171         error = kern_chown(td, path, UIO_SYSSPACE, uap->uid, uap->gid);
 1172         free(path, M_TEMP);
 1173         return (error);
 1174 }
 1175 
 1176 int
 1177 ibcs2_rmdir(td, uap)
 1178         struct thread *td;
 1179         struct ibcs2_rmdir_args *uap;
 1180 {
 1181         char *path;
 1182         int error;
 1183 
 1184         CHECKALTEXIST(td, uap->path, &path);
 1185         error = kern_rmdir(td, path, UIO_SYSSPACE);
 1186         free(path, M_TEMP);
 1187         return (error);
 1188 }
 1189 
 1190 int
 1191 ibcs2_mkdir(td, uap)
 1192         struct thread *td;
 1193         struct ibcs2_mkdir_args *uap;
 1194 {
 1195         char *path;
 1196         int error;
 1197 
 1198         CHECKALTEXIST(td, uap->path, &path);
 1199         error = kern_mkdir(td, path, UIO_SYSSPACE, uap->mode);
 1200         free(path, M_TEMP);
 1201         return (error);
 1202 }
 1203 
 1204 int
 1205 ibcs2_symlink(td, uap)
 1206         struct thread *td;
 1207         struct ibcs2_symlink_args *uap;
 1208 {
 1209         char *path, *link;
 1210         int error;
 1211 
 1212         CHECKALTEXIST(td, uap->path, &path);
 1213 
 1214         /*
 1215          * Have to expand CHECKALTCREAT() so that 'path' can be freed on
 1216          * errors.
 1217          */
 1218         error = ibcs2_emul_find(td, uap->link, UIO_USERSPACE, &link, 1);
 1219         if (link == NULL) {
 1220                 free(path, M_TEMP);
 1221                 return (error);
 1222         }
 1223         error = kern_symlink(td, path, link, UIO_SYSSPACE);
 1224         free(path, M_TEMP);
 1225         free(link, M_TEMP);
 1226         return (error);
 1227 }
 1228 
 1229 int
 1230 ibcs2_rename(td, uap)
 1231         struct thread *td;
 1232         struct ibcs2_rename_args *uap;
 1233 {
 1234         char *from, *to;
 1235         int error;
 1236 
 1237         CHECKALTEXIST(td, uap->from, &from);
 1238 
 1239         /*
 1240          * Have to expand CHECKALTCREAT() so that 'from' can be freed on
 1241          * errors.
 1242          */
 1243         error = ibcs2_emul_find(td, uap->to, UIO_USERSPACE, &to, 1);
 1244         if (to == NULL) {
 1245                 free(from, M_TEMP);
 1246                 return (error);
 1247         }
 1248         error = kern_rename(td, from, to, UIO_SYSSPACE);
 1249         free(from, M_TEMP);
 1250         free(to, M_TEMP);
 1251         return (error);
 1252 }
 1253 
 1254 int
 1255 ibcs2_readlink(td, uap)
 1256         struct thread *td;
 1257         struct ibcs2_readlink_args *uap;
 1258 {
 1259         char *path;
 1260         int error;
 1261 
 1262         CHECKALTEXIST(td, uap->path, &path);
 1263         error = kern_readlink(td, path, UIO_SYSSPACE, uap->buf, UIO_USERSPACE,
 1264                 uap->count);
 1265         free(path, M_TEMP);
 1266         return (error);
 1267 }

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