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/7.3/sys/i386/ibcs2/ibcs2_misc.c 189991 2009-03-18 21:51:02Z jhb $");
   51 
   52 /*
   53  * IBCS2 compatibility module.
   54  *
   55  * IBCS2 system calls that are implemented differently in BSD are
   56  * handled here.
   57  */
   58 #include "opt_mac.h"
   59 
   60 #include <sys/param.h>
   61 #include <sys/systm.h>
   62 #include <sys/dirent.h>
   63 #include <sys/fcntl.h>
   64 #include <sys/filedesc.h>
   65 #include <sys/imgact.h>
   66 #include <sys/kernel.h>
   67 #include <sys/lock.h>
   68 #include <sys/malloc.h>
   69 #include <sys/file.h>                   /* Must come after sys/malloc.h */
   70 #include <sys/mutex.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 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, &fp)) != 0)
  341                 return (error);
  342         if ((fp->f_flag & FREAD) == 0) {
  343                 fdrop(fp, td);
  344                 return (EBADF);
  345         }
  346         vp = fp->f_vnode;
  347         vfslocked = VFS_LOCK_GIANT(vp->v_mount);
  348         if (vp->v_type != VDIR) {       /* XXX  vnode readdir op should do this */
  349                 VFS_UNLOCK_GIANT(vfslocked);
  350                 fdrop(fp, td);
  351                 return (EINVAL);
  352         }
  353 
  354         off = fp->f_offset;
  355 #define DIRBLKSIZ       512             /* XXX we used to use ufs's DIRBLKSIZ */
  356         buflen = max(DIRBLKSIZ, uap->nbytes);
  357         buflen = min(buflen, MAXBSIZE);
  358         buf = malloc(buflen, M_TEMP, M_WAITOK);
  359         vn_lock(vp, LK_SHARED | LK_RETRY, td);
  360 again:
  361         aiov.iov_base = buf;
  362         aiov.iov_len = buflen;
  363         auio.uio_iov = &aiov;
  364         auio.uio_iovcnt = 1;
  365         auio.uio_rw = UIO_READ;
  366         auio.uio_segflg = UIO_SYSSPACE;
  367         auio.uio_td = td;
  368         auio.uio_resid = buflen;
  369         auio.uio_offset = off;
  370 
  371         if (cookies) {
  372                 free(cookies, M_TEMP);
  373                 cookies = NULL;
  374         }
  375 
  376 #ifdef MAC
  377         error = mac_check_vnode_readdir(td->td_ucred, vp);
  378         if (error)
  379                 goto out;
  380 #endif
  381 
  382         /*
  383          * First we read into the malloc'ed buffer, then
  384          * we massage it into user space, one record at a time.
  385          */
  386         if ((error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies, &cookies)) != 0)
  387                 goto out;
  388         inp = buf;
  389         outp = uap->buf;
  390         resid = uap->nbytes;
  391         if ((len = buflen - auio.uio_resid) <= 0)
  392                 goto eof;
  393 
  394         cookiep = cookies;
  395 
  396         if (cookies) {
  397                 /*
  398                  * When using cookies, the vfs has the option of reading from
  399                  * a different offset than that supplied (UFS truncates the
  400                  * offset to a block boundary to make sure that it never reads
  401                  * partway through a directory entry, even if the directory
  402                  * has been compacted).
  403                  */
  404                 while (len > 0 && ncookies > 0 && *cookiep <= off) {
  405                         len -= BSD_DIRENT(inp)->d_reclen;
  406                         inp += BSD_DIRENT(inp)->d_reclen;
  407                         cookiep++;
  408                         ncookies--;
  409                 }
  410         }
  411 
  412         for (; len > 0; len -= reclen) {
  413                 if (cookiep && ncookies == 0)
  414                         break;
  415                 reclen = BSD_DIRENT(inp)->d_reclen;
  416                 if (reclen & 3) {
  417                         printf("ibcs2_getdents: reclen=%d\n", reclen);
  418                         error = EFAULT;
  419                         goto out;
  420                 }
  421                 if (BSD_DIRENT(inp)->d_fileno == 0) {
  422                         inp += reclen;  /* it is a hole; squish it out */
  423                         if (cookiep) {
  424                                 off = *cookiep++;
  425                                 ncookies--;
  426                         } else
  427                                 off += reclen;
  428                         continue;
  429                 }
  430                 if (reclen > len || resid < IBCS2_RECLEN(reclen)) {
  431                         /* entry too big for buffer, so just stop */
  432                         outp++;
  433                         break;
  434                 }
  435                 /*
  436                  * Massage in place to make an iBCS2-shaped dirent (otherwise
  437                  * we have to worry about touching user memory outside of
  438                  * the copyout() call).
  439                  */
  440                 idb.d_ino = (ibcs2_ino_t)BSD_DIRENT(inp)->d_fileno;
  441                 idb.d_off = (ibcs2_off_t)off;
  442                 idb.d_reclen = (u_short)IBCS2_RECLEN(reclen);
  443                 if ((error = copyout((caddr_t)&idb, outp, 10)) != 0 ||
  444                     (error = copyout(BSD_DIRENT(inp)->d_name, outp + 10,
  445                                      BSD_DIRENT(inp)->d_namlen + 1)) != 0)
  446                         goto out;
  447                 /* advance past this real entry */
  448                 if (cookiep) {
  449                         off = *cookiep++;
  450                         ncookies--;
  451                 } else
  452                         off += reclen;
  453                 inp += reclen;
  454                 /* advance output past iBCS2-shaped entry */
  455                 outp += IBCS2_RECLEN(reclen);
  456                 resid -= IBCS2_RECLEN(reclen);
  457         }
  458         /* if we squished out the whole block, try again */
  459         if (outp == uap->buf)
  460                 goto again;
  461         fp->f_offset = off;             /* update the vnode offset */
  462 eof:
  463         td->td_retval[0] = uap->nbytes - resid;
  464 out:
  465         VOP_UNLOCK(vp, 0, td);
  466         VFS_UNLOCK_GIANT(vfslocked);
  467         fdrop(fp, td);
  468         if (cookies)
  469                 free(cookies, M_TEMP);
  470         free(buf, M_TEMP);
  471         return (error);
  472 }
  473 
  474 int
  475 ibcs2_read(td, uap)
  476         struct thread *td;
  477         struct ibcs2_read_args *uap;
  478 {
  479         register struct vnode *vp;
  480         register caddr_t inp, buf;      /* BSD-format */
  481         register int len, reclen;       /* BSD-format */
  482         register caddr_t outp;          /* iBCS2-format */
  483         register int resid;             /* iBCS2-format */
  484         struct file *fp;
  485         struct uio auio;
  486         struct iovec aiov;
  487         struct ibcs2_direct {
  488                 ibcs2_ino_t ino;
  489                 char name[14];
  490         } idb;
  491         off_t off;                      /* true file offset */
  492         int buflen, error, eofflag, size, vfslocked;
  493         u_long *cookies = NULL, *cookiep;
  494         int ncookies;
  495 
  496         if ((error = getvnode(td->td_proc->p_fd, uap->fd, &fp)) != 0) {
  497                 if (error == EINVAL)
  498                         return read(td, (struct read_args *)uap);
  499                 else
  500                         return error;
  501         }
  502         if ((fp->f_flag & FREAD) == 0) {
  503                 fdrop(fp, td);
  504                 return (EBADF);
  505         }
  506         vp = fp->f_vnode;
  507         vfslocked = VFS_LOCK_GIANT(vp->v_mount);
  508         if (vp->v_type != VDIR) {
  509                 VFS_UNLOCK_GIANT(vfslocked);
  510                 fdrop(fp, td);
  511                 return read(td, (struct read_args *)uap);
  512         }
  513 
  514         off = fp->f_offset;
  515 
  516         DPRINTF(("ibcs2_read: read directory\n"));
  517 
  518         buflen = max(DIRBLKSIZ, uap->nbytes);
  519         buflen = min(buflen, MAXBSIZE);
  520         buf = malloc(buflen, M_TEMP, M_WAITOK);
  521         vn_lock(vp, LK_SHARED | LK_RETRY, td);
  522 again:
  523         aiov.iov_base = buf;
  524         aiov.iov_len = buflen;
  525         auio.uio_iov = &aiov;
  526         auio.uio_iovcnt = 1;
  527         auio.uio_rw = UIO_READ;
  528         auio.uio_segflg = UIO_SYSSPACE;
  529         auio.uio_td = td;
  530         auio.uio_resid = buflen;
  531         auio.uio_offset = off;
  532 
  533         if (cookies) {
  534                 free(cookies, M_TEMP);
  535                 cookies = NULL;
  536         }
  537 
  538 #ifdef MAC
  539         error = mac_check_vnode_readdir(td->td_ucred, vp);
  540         if (error)
  541                 goto out;
  542 #endif
  543 
  544         /*
  545          * First we read into the malloc'ed buffer, then
  546          * we massage it into user space, one record at a time.
  547          */
  548         if ((error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies, &cookies)) != 0) {
  549                 DPRINTF(("VOP_READDIR failed: %d\n", error));
  550                 goto out;
  551         }
  552         inp = buf;
  553         outp = uap->buf;
  554         resid = uap->nbytes;
  555         if ((len = buflen - auio.uio_resid) <= 0)
  556                 goto eof;
  557 
  558         cookiep = cookies;
  559 
  560         if (cookies) {
  561                 /*
  562                  * When using cookies, the vfs has the option of reading from
  563                  * a different offset than that supplied (UFS truncates the
  564                  * offset to a block boundary to make sure that it never reads
  565                  * partway through a directory entry, even if the directory
  566                  * has been compacted).
  567                  */
  568                 while (len > 0 && ncookies > 0 && *cookiep <= off) {
  569                         len -= BSD_DIRENT(inp)->d_reclen;
  570                         inp += BSD_DIRENT(inp)->d_reclen;
  571                         cookiep++;
  572                         ncookies--;
  573                 }
  574         }
  575 
  576         for (; len > 0 && resid > 0; len -= reclen) {
  577                 if (cookiep && ncookies == 0)
  578                         break;
  579                 reclen = BSD_DIRENT(inp)->d_reclen;
  580                 if (reclen & 3) {
  581                         printf("ibcs2_read: reclen=%d\n", reclen);
  582                         error = EFAULT;
  583                         goto out;
  584                 }
  585                 if (BSD_DIRENT(inp)->d_fileno == 0) {
  586                         inp += reclen;  /* it is a hole; squish it out */
  587                         if (cookiep) {
  588                                 off = *cookiep++;
  589                                 ncookies--;
  590                         } else
  591                                 off += reclen;
  592                         continue;
  593                 }
  594                 if (reclen > len || resid < sizeof(struct ibcs2_direct)) {
  595                         /* entry too big for buffer, so just stop */
  596                         outp++;
  597                         break;
  598                 }
  599                 /*
  600                  * Massage in place to make an iBCS2-shaped dirent (otherwise
  601                  * we have to worry about touching user memory outside of
  602                  * the copyout() call).
  603                  *
  604                  * TODO: if length(filename) > 14, then break filename into
  605                  * multiple entries and set inode = 0xffff except last
  606                  */
  607                 idb.ino = (BSD_DIRENT(inp)->d_fileno > 0xfffe) ? 0xfffe :
  608                         BSD_DIRENT(inp)->d_fileno;
  609                 (void)copystr(BSD_DIRENT(inp)->d_name, idb.name, 14, &size);
  610                 bzero(idb.name + size, 14 - size);
  611                 if ((error = copyout(&idb, outp, sizeof(struct ibcs2_direct))) != 0)
  612                         goto out;
  613                 /* advance past this real entry */
  614                 if (cookiep) {
  615                         off = *cookiep++;
  616                         ncookies--;
  617                 } else
  618                         off += reclen;
  619                 inp += reclen;
  620                 /* advance output past iBCS2-shaped entry */
  621                 outp += sizeof(struct ibcs2_direct);
  622                 resid -= sizeof(struct ibcs2_direct);
  623         }
  624         /* if we squished out the whole block, try again */
  625         if (outp == uap->buf)
  626                 goto again;
  627         fp->f_offset = off;             /* update the vnode offset */
  628 eof:
  629         td->td_retval[0] = uap->nbytes - resid;
  630 out:
  631         VOP_UNLOCK(vp, 0, td);
  632         VFS_UNLOCK_GIANT(vfslocked);
  633         fdrop(fp, td);
  634         if (cookies)
  635                 free(cookies, M_TEMP);
  636         free(buf, M_TEMP);
  637         return (error);
  638 }
  639 
  640 int
  641 ibcs2_mknod(td, uap)
  642         struct thread *td;
  643         struct ibcs2_mknod_args *uap;
  644 {
  645         char *path;
  646         int error;
  647 
  648         CHECKALTCREAT(td, uap->path, &path);
  649         if (S_ISFIFO(uap->mode))
  650                 error = kern_mkfifo(td, path, UIO_SYSSPACE, uap->mode);
  651         else
  652                 error = kern_mknod(td, path, UIO_SYSSPACE, uap->mode, uap->dev);
  653         free(path, M_TEMP);
  654         return (error);
  655 }
  656 
  657 int
  658 ibcs2_getgroups(td, uap)
  659         struct thread *td;
  660         struct ibcs2_getgroups_args *uap;
  661 {
  662         ibcs2_gid_t iset[NGROUPS_MAX];
  663         gid_t gp[NGROUPS_MAX];
  664         u_int i, ngrp;
  665         int error;
  666 
  667         if (uap->gidsetsize < 0)
  668                 return (EINVAL);
  669         ngrp = MIN(uap->gidsetsize, NGROUPS_MAX);
  670         error = kern_getgroups(td, &ngrp, gp);
  671         if (error)
  672                 return (error);
  673         if (uap->gidsetsize > 0) {
  674                 for (i = 0; i < ngrp; i++)
  675                         iset[i] = (ibcs2_gid_t)gp[i];
  676                 error = copyout(iset, uap->gidset, ngrp * sizeof(ibcs2_gid_t));
  677         }
  678         if (error == 0)
  679                 td->td_retval[0] = ngrp;
  680         return (error);
  681 }
  682 
  683 int
  684 ibcs2_setgroups(td, uap)
  685         struct thread *td;
  686         struct ibcs2_setgroups_args *uap;
  687 {
  688         ibcs2_gid_t iset[NGROUPS_MAX];
  689         gid_t gp[NGROUPS_MAX];
  690         int error, i;
  691 
  692         if (uap->gidsetsize < 0 || uap->gidsetsize > NGROUPS_MAX)
  693                 return (EINVAL);
  694         if (uap->gidsetsize && uap->gidset) {
  695                 error = copyin(uap->gidset, iset, sizeof(ibcs2_gid_t) *
  696                     uap->gidsetsize);
  697                 if (error)
  698                         return (error);
  699                 for (i = 0; i < uap->gidsetsize; i++)
  700                         gp[i] = (gid_t)iset[i];
  701         }
  702         return (kern_setgroups(td, uap->gidsetsize, gp));
  703 }
  704 
  705 int
  706 ibcs2_setuid(td, uap)
  707         struct thread *td;
  708         struct ibcs2_setuid_args *uap;
  709 {
  710         struct setuid_args sa;
  711 
  712         sa.uid = (uid_t)uap->uid;
  713         return setuid(td, &sa);
  714 }
  715 
  716 int
  717 ibcs2_setgid(td, uap)
  718         struct thread *td;
  719         struct ibcs2_setgid_args *uap;
  720 {
  721         struct setgid_args sa;
  722 
  723         sa.gid = (gid_t)uap->gid;
  724         return setgid(td, &sa);
  725 }
  726 
  727 int
  728 ibcs2_time(td, uap)
  729         struct thread *td;
  730         struct ibcs2_time_args *uap;
  731 {
  732         struct timeval tv;
  733 
  734         microtime(&tv);
  735         td->td_retval[0] = tv.tv_sec;
  736         if (uap->tp)
  737                 return copyout((caddr_t)&tv.tv_sec, (caddr_t)uap->tp,
  738                                sizeof(ibcs2_time_t));
  739         else
  740                 return 0;
  741 }
  742 
  743 int
  744 ibcs2_pathconf(td, uap)
  745         struct thread *td;
  746         struct ibcs2_pathconf_args *uap;
  747 {
  748         char *path;
  749         int error;
  750 
  751         CHECKALTEXIST(td, uap->path, &path);
  752         uap->name++;    /* iBCS2 _PC_* defines are offset by one */
  753         error = kern_pathconf(td, path, UIO_SYSSPACE, uap->name);
  754         free(path, M_TEMP);
  755         return (error);
  756 }
  757 
  758 int
  759 ibcs2_fpathconf(td, uap)
  760         struct thread *td;
  761         struct ibcs2_fpathconf_args *uap;
  762 {
  763         uap->name++;    /* iBCS2 _PC_* defines are offset by one */
  764         return fpathconf(td, (struct fpathconf_args *)uap);
  765 }
  766 
  767 int
  768 ibcs2_sysconf(td, uap)
  769         struct thread *td;
  770         struct ibcs2_sysconf_args *uap;
  771 {
  772         int mib[2], value, len, error;
  773         struct proc *p;
  774 
  775         p = td->td_proc;
  776         switch(uap->name) {
  777         case IBCS2_SC_ARG_MAX:
  778                 mib[1] = KERN_ARGMAX;
  779                 break;
  780 
  781         case IBCS2_SC_CHILD_MAX:
  782                 PROC_LOCK(p);
  783                 td->td_retval[0] = lim_cur(td->td_proc, RLIMIT_NPROC);
  784                 PROC_UNLOCK(p);
  785                 return 0;
  786 
  787         case IBCS2_SC_CLK_TCK:
  788                 td->td_retval[0] = hz;
  789                 return 0;
  790 
  791         case IBCS2_SC_NGROUPS_MAX:
  792                 mib[1] = KERN_NGROUPS;
  793                 break;
  794 
  795         case IBCS2_SC_OPEN_MAX:
  796                 PROC_LOCK(p);
  797                 td->td_retval[0] = lim_cur(td->td_proc, RLIMIT_NOFILE);
  798                 PROC_UNLOCK(p);
  799                 return 0;
  800                 
  801         case IBCS2_SC_JOB_CONTROL:
  802                 mib[1] = KERN_JOB_CONTROL;
  803                 break;
  804                 
  805         case IBCS2_SC_SAVED_IDS:
  806                 mib[1] = KERN_SAVED_IDS;
  807                 break;
  808                 
  809         case IBCS2_SC_VERSION:
  810                 mib[1] = KERN_POSIX1;
  811                 break;
  812                 
  813         case IBCS2_SC_PASS_MAX:
  814                 td->td_retval[0] = 128;         /* XXX - should we create PASS_MAX ? */
  815                 return 0;
  816 
  817         case IBCS2_SC_XOPEN_VERSION:
  818                 td->td_retval[0] = 2;           /* XXX: What should that be? */
  819                 return 0;
  820                 
  821         default:
  822                 return EINVAL;
  823         }
  824 
  825         mib[0] = CTL_KERN;
  826         len = sizeof(value);
  827         error = kernel_sysctl(td, mib, 2, &value, &len, NULL, 0, NULL, 0);
  828         if (error)
  829                 return error;
  830         td->td_retval[0] = value;
  831         return 0;
  832 }
  833 
  834 int
  835 ibcs2_alarm(td, uap)
  836         struct thread *td;
  837         struct ibcs2_alarm_args *uap;
  838 {
  839         struct itimerval itv, oitv;
  840         int error;
  841 
  842         timevalclear(&itv.it_interval);
  843         itv.it_value.tv_sec = uap->sec;
  844         itv.it_value.tv_usec = 0;
  845         error = kern_setitimer(td, ITIMER_REAL, &itv, &oitv);
  846         if (error)
  847                 return (error);
  848         if (oitv.it_value.tv_usec != 0)
  849                 oitv.it_value.tv_sec++;
  850         td->td_retval[0] = oitv.it_value.tv_sec;
  851         return (0);
  852 }
  853 
  854 int
  855 ibcs2_times(td, uap)
  856         struct thread *td;
  857         struct ibcs2_times_args *uap;
  858 {
  859         struct rusage ru;
  860         struct timeval t;
  861         struct tms tms;
  862         int error;
  863 
  864 #define CONVTCK(r)      (r.tv_sec * hz + r.tv_usec / (1000000 / hz))
  865 
  866         error = kern_getrusage(td, RUSAGE_SELF, &ru);
  867         if (error)
  868                 return (error);
  869         tms.tms_utime = CONVTCK(ru.ru_utime);
  870         tms.tms_stime = CONVTCK(ru.ru_stime);
  871 
  872         error = kern_getrusage(td, RUSAGE_CHILDREN, &ru);
  873         if (error)
  874                 return (error);
  875         tms.tms_cutime = CONVTCK(ru.ru_utime);
  876         tms.tms_cstime = CONVTCK(ru.ru_stime);
  877 
  878         microtime(&t);
  879         td->td_retval[0] = CONVTCK(t);
  880         
  881         return (copyout(&tms, uap->tp, sizeof(struct tms)));
  882 }
  883 
  884 int
  885 ibcs2_stime(td, uap)
  886         struct thread *td;
  887         struct ibcs2_stime_args *uap;
  888 {
  889         struct timeval tv;
  890         long secs;
  891         int error;
  892 
  893         error = copyin(uap->timep, &secs, sizeof(long));
  894         if (error)
  895                 return (error);
  896         tv.tv_sec = secs;
  897         tv.tv_usec = 0;
  898         error = kern_settimeofday(td, &tv, NULL);
  899         if (error)
  900                 error = EPERM;
  901         return (error);
  902 }
  903 
  904 int
  905 ibcs2_utime(td, uap)
  906         struct thread *td;
  907         struct ibcs2_utime_args *uap;
  908 {
  909         struct ibcs2_utimbuf ubuf;
  910         struct timeval tbuf[2], *tp;
  911         char *path;
  912         int error;
  913 
  914         if (uap->buf) {
  915                 error = copyin(uap->buf, &ubuf, sizeof(ubuf));
  916                 if (error)
  917                         return (error);
  918                 tbuf[0].tv_sec = ubuf.actime;
  919                 tbuf[0].tv_usec = 0;
  920                 tbuf[1].tv_sec = ubuf.modtime;
  921                 tbuf[1].tv_usec = 0;
  922                 tp = tbuf;
  923         } else
  924                 tp = NULL;
  925 
  926         CHECKALTEXIST(td, uap->path, &path);
  927         error = kern_utimes(td, path, UIO_SYSSPACE, tp, UIO_SYSSPACE);
  928         free(path, M_TEMP);
  929         return (error);
  930 }
  931 
  932 int
  933 ibcs2_nice(td, uap)
  934         struct thread *td;
  935         struct ibcs2_nice_args *uap;
  936 {
  937         int error;
  938         struct setpriority_args sa;
  939 
  940         sa.which = PRIO_PROCESS;
  941         sa.who = 0;
  942         sa.prio = td->td_proc->p_nice + uap->incr;
  943         if ((error = setpriority(td, &sa)) != 0)
  944                 return EPERM;
  945         td->td_retval[0] = td->td_proc->p_nice;
  946         return 0;
  947 }
  948 
  949 /*
  950  * iBCS2 getpgrp, setpgrp, setsid, and setpgid
  951  */
  952 
  953 int
  954 ibcs2_pgrpsys(td, uap)
  955         struct thread *td;
  956         struct ibcs2_pgrpsys_args *uap;
  957 {
  958         struct proc *p = td->td_proc;
  959         switch (uap->type) {
  960         case 0:                 /* getpgrp */
  961                 PROC_LOCK(p);
  962                 td->td_retval[0] = p->p_pgrp->pg_id;
  963                 PROC_UNLOCK(p);
  964                 return 0;
  965 
  966         case 1:                 /* setpgrp */
  967             {
  968                 struct setpgid_args sa;
  969 
  970                 sa.pid = 0;
  971                 sa.pgid = 0;
  972                 setpgid(td, &sa);
  973                 PROC_LOCK(p);
  974                 td->td_retval[0] = p->p_pgrp->pg_id;
  975                 PROC_UNLOCK(p);
  976                 return 0;
  977             }
  978 
  979         case 2:                 /* setpgid */
  980             {
  981                 struct setpgid_args sa;
  982 
  983                 sa.pid = uap->pid;
  984                 sa.pgid = uap->pgid;
  985                 return setpgid(td, &sa);
  986             }
  987 
  988         case 3:                 /* setsid */
  989                 return setsid(td, NULL);
  990 
  991         default:
  992                 return EINVAL;
  993         }
  994 }
  995 
  996 /*
  997  * XXX - need to check for nested calls
  998  */
  999 
 1000 int
 1001 ibcs2_plock(td, uap)
 1002         struct thread *td;
 1003         struct ibcs2_plock_args *uap;
 1004 {
 1005         int error;
 1006 #define IBCS2_UNLOCK    0
 1007 #define IBCS2_PROCLOCK  1
 1008 #define IBCS2_TEXTLOCK  2
 1009 #define IBCS2_DATALOCK  4
 1010 
 1011         
 1012         switch(uap->cmd) {
 1013         case IBCS2_UNLOCK:
 1014                 error = priv_check(td, PRIV_VM_MUNLOCK);
 1015                 if (error)
 1016                         return (error);
 1017                 /* XXX - TODO */
 1018                 return (0);
 1019 
 1020         case IBCS2_PROCLOCK:
 1021         case IBCS2_TEXTLOCK:
 1022         case IBCS2_DATALOCK:
 1023                 error = priv_check(td, PRIV_VM_MLOCK);
 1024                 if (error)
 1025                         return (error);
 1026                 /* XXX - TODO */
 1027                 return 0;
 1028         }
 1029         return EINVAL;
 1030 }
 1031 
 1032 int
 1033 ibcs2_uadmin(td, uap)
 1034         struct thread *td;
 1035         struct ibcs2_uadmin_args *uap;
 1036 {
 1037 #define SCO_A_REBOOT        1
 1038 #define SCO_A_SHUTDOWN      2
 1039 #define SCO_A_REMOUNT       4
 1040 #define SCO_A_CLOCK         8
 1041 #define SCO_A_SETCONFIG     128
 1042 #define SCO_A_GETDEV        130
 1043 
 1044 #define SCO_AD_HALT         0
 1045 #define SCO_AD_BOOT         1
 1046 #define SCO_AD_IBOOT        2
 1047 #define SCO_AD_PWRDOWN      3
 1048 #define SCO_AD_PWRNAP       4
 1049 
 1050 #define SCO_AD_PANICBOOT    1
 1051 
 1052 #define SCO_AD_GETBMAJ      0
 1053 #define SCO_AD_GETCMAJ      1
 1054 
 1055         switch(uap->cmd) {
 1056         case SCO_A_REBOOT:
 1057         case SCO_A_SHUTDOWN:
 1058                 switch(uap->func) {
 1059                         struct reboot_args r;
 1060                 case SCO_AD_HALT:
 1061                 case SCO_AD_PWRDOWN:
 1062                 case SCO_AD_PWRNAP:
 1063                         r.opt = RB_HALT;
 1064                         return (reboot(td, &r));
 1065                 case SCO_AD_BOOT:
 1066                 case SCO_AD_IBOOT:
 1067                         r.opt = RB_AUTOBOOT;
 1068                         return (reboot(td, &r));
 1069                 }
 1070                 return EINVAL;
 1071         case SCO_A_REMOUNT:
 1072         case SCO_A_CLOCK:
 1073         case SCO_A_SETCONFIG:
 1074                 return 0;
 1075         case SCO_A_GETDEV:
 1076                 return EINVAL;  /* XXX - TODO */
 1077         }
 1078         return EINVAL;
 1079 }
 1080 
 1081 int
 1082 ibcs2_sysfs(td, uap)
 1083         struct thread *td;
 1084         struct ibcs2_sysfs_args *uap;
 1085 {
 1086 #define IBCS2_GETFSIND        1
 1087 #define IBCS2_GETFSTYP        2
 1088 #define IBCS2_GETNFSTYP       3
 1089 
 1090         switch(uap->cmd) {
 1091         case IBCS2_GETFSIND:
 1092         case IBCS2_GETFSTYP:
 1093         case IBCS2_GETNFSTYP:
 1094                 break;
 1095         }
 1096         return EINVAL;          /* XXX - TODO */
 1097 }
 1098 
 1099 int
 1100 ibcs2_unlink(td, uap)
 1101         struct thread *td;
 1102         struct ibcs2_unlink_args *uap;
 1103 {
 1104         char *path;
 1105         int error;
 1106 
 1107         CHECKALTEXIST(td, uap->path, &path);
 1108         error = kern_unlink(td, path, UIO_SYSSPACE);
 1109         free(path, M_TEMP);
 1110         return (error);
 1111 }
 1112 
 1113 int
 1114 ibcs2_chdir(td, uap)
 1115         struct thread *td;
 1116         struct ibcs2_chdir_args *uap;
 1117 {
 1118         char *path;
 1119         int error;
 1120 
 1121         CHECKALTEXIST(td, uap->path, &path);
 1122         error = kern_chdir(td, path, UIO_SYSSPACE);
 1123         free(path, M_TEMP);
 1124         return (error);
 1125 }
 1126 
 1127 int
 1128 ibcs2_chmod(td, uap)
 1129         struct thread *td;
 1130         struct ibcs2_chmod_args *uap;
 1131 {
 1132         char *path;
 1133         int error;
 1134 
 1135         CHECKALTEXIST(td, uap->path, &path);
 1136         error = kern_chmod(td, path, UIO_SYSSPACE, uap->mode);
 1137         free(path, M_TEMP);
 1138         return (error);
 1139 }
 1140 
 1141 int
 1142 ibcs2_chown(td, uap)
 1143         struct thread *td;
 1144         struct ibcs2_chown_args *uap;
 1145 {
 1146         char *path;
 1147         int error;
 1148 
 1149         CHECKALTEXIST(td, uap->path, &path);
 1150         error = kern_chown(td, path, UIO_SYSSPACE, uap->uid, uap->gid);
 1151         free(path, M_TEMP);
 1152         return (error);
 1153 }
 1154 
 1155 int
 1156 ibcs2_rmdir(td, uap)
 1157         struct thread *td;
 1158         struct ibcs2_rmdir_args *uap;
 1159 {
 1160         char *path;
 1161         int error;
 1162 
 1163         CHECKALTEXIST(td, uap->path, &path);
 1164         error = kern_rmdir(td, path, UIO_SYSSPACE);
 1165         free(path, M_TEMP);
 1166         return (error);
 1167 }
 1168 
 1169 int
 1170 ibcs2_mkdir(td, uap)
 1171         struct thread *td;
 1172         struct ibcs2_mkdir_args *uap;
 1173 {
 1174         char *path;
 1175         int error;
 1176 
 1177         CHECKALTEXIST(td, uap->path, &path);
 1178         error = kern_mkdir(td, path, UIO_SYSSPACE, uap->mode);
 1179         free(path, M_TEMP);
 1180         return (error);
 1181 }
 1182 
 1183 int
 1184 ibcs2_symlink(td, uap)
 1185         struct thread *td;
 1186         struct ibcs2_symlink_args *uap;
 1187 {
 1188         char *path, *link;
 1189         int error;
 1190 
 1191         CHECKALTEXIST(td, uap->path, &path);
 1192 
 1193         /*
 1194          * Have to expand CHECKALTCREAT() so that 'path' can be freed on
 1195          * errors.
 1196          */
 1197         error = ibcs2_emul_find(td, uap->link, UIO_USERSPACE, &link, 1);
 1198         if (link == NULL) {
 1199                 free(path, M_TEMP);
 1200                 return (error);
 1201         }
 1202         error = kern_symlink(td, path, link, UIO_SYSSPACE);
 1203         free(path, M_TEMP);
 1204         free(link, M_TEMP);
 1205         return (error);
 1206 }
 1207 
 1208 int
 1209 ibcs2_rename(td, uap)
 1210         struct thread *td;
 1211         struct ibcs2_rename_args *uap;
 1212 {
 1213         char *from, *to;
 1214         int error;
 1215 
 1216         CHECKALTEXIST(td, uap->from, &from);
 1217 
 1218         /*
 1219          * Have to expand CHECKALTCREAT() so that 'from' can be freed on
 1220          * errors.
 1221          */
 1222         error = ibcs2_emul_find(td, uap->to, UIO_USERSPACE, &to, 1);
 1223         if (to == NULL) {
 1224                 free(from, M_TEMP);
 1225                 return (error);
 1226         }
 1227         error = kern_rename(td, from, to, UIO_SYSSPACE);
 1228         free(from, M_TEMP);
 1229         free(to, M_TEMP);
 1230         return (error);
 1231 }
 1232 
 1233 int
 1234 ibcs2_readlink(td, uap)
 1235         struct thread *td;
 1236         struct ibcs2_readlink_args *uap;
 1237 {
 1238         char *path;
 1239         int error;
 1240 
 1241         CHECKALTEXIST(td, uap->path, &path);
 1242         error = kern_readlink(td, path, UIO_SYSSPACE, uap->buf, UIO_USERSPACE,
 1243                 uap->count);
 1244         free(path, M_TEMP);
 1245         return (error);
 1246 }

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