svr4_stat.c

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    1 /*-
    2  * Copyright (c) 1998 Mark Newton
    3  * Copyright (c) 1994 Christos Zoulas
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. The name of the author may not be used to endorse or promote products
   15  *    derived from this software without specific prior written permission
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/6.3/sys/compat/svr4/svr4_stat.c 141486 2005-02-07 21:53:42Z jhb $");
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/proc.h>
   35 #include <sys/stat.h>
   36 #include <sys/filedesc.h>
   37 #include <sys/jail.h>
   38 #include <sys/kernel.h>
   39 #include <sys/malloc.h>
   40 #include <sys/unistd.h>
   41 #include <sys/time.h>
   42 #include <sys/syscallsubr.h>
   43 #include <sys/sysctl.h>
   44 #include <sys/sysproto.h>
   45 #include <sys/un.h>
   46 
   47 #include <vm/vm.h>
   48 
   49 #include <netinet/in.h>
   50 
   51 #include <compat/svr4/svr4.h>
   52 #include <compat/svr4/svr4_types.h>
   53 #include <compat/svr4/svr4_signal.h>
   54 #include <compat/svr4/svr4_proto.h>
   55 #include <compat/svr4/svr4_util.h>
   56 #include <compat/svr4/svr4_stat.h>
   57 #include <compat/svr4/svr4_ustat.h>
   58 #include <compat/svr4/svr4_utsname.h>
   59 #include <compat/svr4/svr4_systeminfo.h>
   60 #include <compat/svr4/svr4_socket.h>
   61 #include <compat/svr4/svr4_time.h>
   62 #if defined(NOTYET)
   63 #include "svr4_fuser.h"
   64 #endif
   65 
   66 #ifdef sparc
   67 /* 
   68  * Solaris-2.4 on the sparc has the old stat call using the new
   69  * stat data structure...
   70  */
   71 # define SVR4_NO_OSTAT
   72 #endif
   73 
   74 struct svr4_ustat_args {
   75         svr4_dev_t              dev;
   76         struct svr4_ustat * name;
   77 };
   78 
   79 static void bsd_to_svr4_xstat(struct stat *, struct svr4_xstat *);
   80 static void bsd_to_svr4_stat64(struct stat *, struct svr4_stat64 *);
   81 int svr4_ustat(struct thread *, struct svr4_ustat_args *);
   82 static int svr4_to_bsd_pathconf(int);
   83 
   84 /*
   85  * SVR4 uses named pipes as named sockets, so we tell programs
   86  * that sockets are named pipes with mode 0
   87  */
   88 #define BSD_TO_SVR4_MODE(mode) (S_ISSOCK(mode) ? S_IFIFO : (mode))
   89 
   90 
   91 #ifndef SVR4_NO_OSTAT
   92 static void bsd_to_svr4_stat(struct stat *, struct svr4_stat *);
   93 
   94 static void
   95 bsd_to_svr4_stat(st, st4)
   96         struct stat             *st;
   97         struct svr4_stat        *st4;
   98 {
   99         memset(st4, 0, sizeof(*st4));
  100         st4->st_dev = bsd_to_svr4_odev_t(st->st_dev);
  101         st4->st_ino = st->st_ino;
  102         st4->st_mode = BSD_TO_SVR4_MODE(st->st_mode);
  103         st4->st_nlink = st->st_nlink;
  104         st4->st_uid = st->st_uid;
  105         st4->st_gid = st->st_gid;
  106         st4->st_rdev = bsd_to_svr4_odev_t(st->st_rdev);
  107         st4->st_size = st->st_size;
  108         st4->st_atim = st->st_atimespec.tv_sec;
  109         st4->st_mtim = st->st_mtimespec.tv_sec;
  110         st4->st_ctim = st->st_ctimespec.tv_sec;
  111 }
  112 #endif
  113 
  114 
  115 static void
  116 bsd_to_svr4_xstat(st, st4)
  117         struct stat             *st;
  118         struct svr4_xstat       *st4;
  119 {
  120         memset(st4, 0, sizeof(*st4));
  121         st4->st_dev = bsd_to_svr4_dev_t(st->st_dev);
  122         st4->st_ino = st->st_ino;
  123         st4->st_mode = BSD_TO_SVR4_MODE(st->st_mode);
  124         st4->st_nlink = st->st_nlink;
  125         st4->st_uid = st->st_uid;
  126         st4->st_gid = st->st_gid;
  127         st4->st_rdev = bsd_to_svr4_dev_t(st->st_rdev);
  128         st4->st_size = st->st_size;
  129         st4->st_atim = st->st_atimespec;
  130         st4->st_mtim = st->st_mtimespec;
  131         st4->st_ctim = st->st_ctimespec;
  132         st4->st_blksize = st->st_blksize;
  133         st4->st_blocks = st->st_blocks;
  134         strcpy(st4->st_fstype, "unknown");
  135 }
  136 
  137 
  138 static void
  139 bsd_to_svr4_stat64(st, st4)
  140         struct stat             *st;
  141         struct svr4_stat64      *st4;
  142 {
  143         memset(st4, 0, sizeof(*st4));
  144         st4->st_dev = bsd_to_svr4_dev_t(st->st_dev);
  145         st4->st_ino = st->st_ino;
  146         st4->st_mode = BSD_TO_SVR4_MODE(st->st_mode);
  147         st4->st_nlink = st->st_nlink;
  148         st4->st_uid = st->st_uid;
  149         st4->st_gid = st->st_gid;
  150         st4->st_rdev = bsd_to_svr4_dev_t(st->st_rdev);
  151         st4->st_size = st->st_size;
  152         st4->st_atim = st->st_atimespec;
  153         st4->st_mtim = st->st_mtimespec;
  154         st4->st_ctim = st->st_ctimespec;
  155         st4->st_blksize = st->st_blksize;
  156         st4->st_blocks = st->st_blocks;
  157         strcpy(st4->st_fstype, "unknown");
  158 }
  159 
  160 int
  161 svr4_sys_stat(td, uap)
  162         struct thread *td;
  163         struct svr4_sys_stat_args *uap;
  164 {
  165         struct svr4_stat svr4_st;
  166         struct stat st;
  167         char *path;
  168         int error;
  169 
  170         CHECKALTEXIST(td, uap->path, &path);
  171 
  172         error = kern_stat(td, path, UIO_SYSSPACE, &st);
  173         free(path, M_TEMP);
  174         if (error)
  175                 return (error);
  176         bsd_to_svr4_stat(&st, &svr4_st);
  177 
  178         if (S_ISSOCK(st.st_mode))
  179                 (void) svr4_add_socket(td, uap->path, &st);
  180 
  181         return (copyout(&svr4_st, uap->ub, sizeof svr4_st));
  182 }
  183 
  184 
  185 int
  186 svr4_sys_lstat(td, uap)
  187         register struct thread *td;
  188         struct svr4_sys_lstat_args *uap;
  189 {
  190         struct svr4_stat svr4_st;
  191         struct stat st;
  192         char *path;
  193         int error;
  194 
  195         CHECKALTEXIST(td, uap->path, &path);
  196 
  197         error = kern_lstat(td, path, UIO_SYSSPACE, &st);
  198         free(path, M_TEMP);
  199         if (error)
  200                 return (error);
  201         bsd_to_svr4_stat(&st, &svr4_st);
  202 
  203         if (S_ISSOCK(st.st_mode))
  204                 (void) svr4_add_socket(td, uap->path, &st);
  205 
  206         return (copyout(&svr4_st, uap->ub, sizeof svr4_st));
  207 }
  208 
  209 
  210 int
  211 svr4_sys_fstat(td, uap)
  212         register struct thread *td;
  213         struct svr4_sys_fstat_args *uap;
  214 {
  215         struct svr4_stat svr4_st;
  216         struct stat st;
  217         int error;
  218 
  219 
  220         error = kern_fstat(td, uap->fd, &st);
  221         if (error)
  222                 return (error);
  223         bsd_to_svr4_stat(&st, &svr4_st);
  224         return (copyout(&svr4_st, uap->sb, sizeof svr4_st));
  225 }
  226 
  227 
  228 int
  229 svr4_sys_xstat(td, uap)
  230         register struct thread *td;
  231         struct svr4_sys_xstat_args *uap;
  232 {
  233         struct svr4_xstat svr4_st;
  234         struct stat st;
  235         char *path;
  236         int error;
  237 
  238         CHECKALTEXIST(td, uap->path, &path);
  239 
  240         error = kern_stat(td, path, UIO_SYSSPACE, &st);
  241         free(path, M_TEMP);
  242         if (error)
  243                 return (error);
  244 
  245         bsd_to_svr4_xstat(&st, &svr4_st);
  246 
  247 #if defined(SOCKET_NOTYET)
  248         if (S_ISSOCK(st.st_mode))
  249                 (void) svr4_add_socket(td, uap->path, &st);
  250 #endif
  251 
  252         return (copyout(&svr4_st, uap->ub, sizeof svr4_st));
  253 }
  254 
  255 int
  256 svr4_sys_lxstat(td, uap)
  257         register struct thread *td;
  258         struct svr4_sys_lxstat_args *uap;
  259 {
  260         struct svr4_xstat svr4_st;
  261         struct stat st;
  262         char *path;
  263         int error;
  264 
  265         CHECKALTEXIST(td, uap->path, &path);
  266 
  267         error = kern_lstat(td, path, UIO_SYSSPACE, &st);
  268         free(path, M_TEMP);
  269         if (error)
  270                 return (error);
  271 
  272         bsd_to_svr4_xstat(&st, &svr4_st);
  273 
  274 #if defined(SOCKET_NOTYET)
  275         if (S_ISSOCK(st.st_mode))
  276                 (void) svr4_add_socket(td, uap->path, &st);
  277 #endif
  278         return (copyout(&svr4_st, uap->ub, sizeof svr4_st));
  279 }
  280 
  281 
  282 int
  283 svr4_sys_fxstat(td, uap)
  284         register struct thread *td;
  285         struct svr4_sys_fxstat_args *uap;
  286 {
  287         struct svr4_xstat svr4_st;
  288         struct stat st;
  289         int error;
  290 
  291 
  292         error = kern_fstat(td, uap->fd, &st);
  293         if (error)
  294                 return (error);
  295         bsd_to_svr4_xstat(&st, &svr4_st);
  296         return (copyout(&svr4_st, uap->sb, sizeof svr4_st));
  297 }
  298 
  299 int
  300 svr4_sys_stat64(td, uap)
  301         register struct thread *td;
  302         struct svr4_sys_stat64_args *uap;
  303 {
  304         struct svr4_stat64 svr4_st;
  305         struct stat st;
  306         char *path;
  307         int error;
  308 
  309         CHECKALTEXIST(td, uap->path, &path);
  310 
  311         error = kern_stat(td, path, UIO_SYSSPACE, &st);
  312         free(path, M_TEMP);
  313         if (error)
  314                 return (error);
  315 
  316         bsd_to_svr4_stat64(&st, &svr4_st);
  317 
  318         if (S_ISSOCK(st.st_mode))
  319                 (void) svr4_add_socket(td, uap->path, &st);
  320 
  321         return (copyout(&svr4_st, uap->sb, sizeof svr4_st));
  322 }
  323 
  324 
  325 int
  326 svr4_sys_lstat64(td, uap)
  327         register struct thread *td;
  328         struct svr4_sys_lstat64_args *uap;
  329 {
  330         struct svr4_stat64 svr4_st;
  331         struct stat st;
  332         char *path;
  333         int error;
  334 
  335         CHECKALTEXIST(td, uap->path, &path);
  336 
  337         error = kern_lstat(td, path, UIO_SYSSPACE, &st);
  338         free(path, M_TEMP);
  339         if (error)
  340                 return (error);
  341 
  342         bsd_to_svr4_stat64(&st, &svr4_st);
  343 
  344         if (S_ISSOCK(st.st_mode))
  345                 (void) svr4_add_socket(td, uap->path, &st);
  346 
  347         return (copyout(&svr4_st, uap->sb, sizeof svr4_st));
  348 }
  349 
  350 
  351 int
  352 svr4_sys_fstat64(td, uap)
  353         register struct thread *td;
  354         struct svr4_sys_fstat64_args *uap;
  355 {
  356         struct svr4_stat64 svr4_st;
  357         struct stat st;
  358         int error;
  359 
  360         error = kern_fstat(td, uap->fd, &st);
  361         if (error)
  362                 return (error);
  363         bsd_to_svr4_stat64(&st, &svr4_st);
  364         return (copyout(&svr4_st, uap->sb, sizeof svr4_st));
  365 }
  366 
  367 
  368 int
  369 svr4_ustat(td, uap)
  370         register struct thread *td;
  371         struct svr4_ustat_args *uap;
  372 {
  373         struct svr4_ustat       us;
  374         int                     error;
  375 
  376         memset(&us, 0, sizeof us);
  377 
  378         /*
  379          * XXX: should set f_tfree and f_tinode at least
  380          * How do we translate dev -> fstat? (and then to svr4_ustat)
  381          */
  382         if ((error = copyout(&us, uap->name, sizeof us)) != 0)
  383                 return (error);
  384 
  385         return 0;
  386 }
  387 
  388 /*extern char ostype[], hostname[], osrelease[], version[], machine[];*/
  389 
  390 int
  391 svr4_sys_uname(td, uap)
  392         register struct thread *td;
  393         struct svr4_sys_uname_args *uap;
  394 {
  395         struct svr4_utsname     sut;
  396         
  397         memset(&sut, 0, sizeof(sut));
  398 
  399         strlcpy(sut.sysname, ostype, sizeof(sut.sysname));
  400         getcredhostname(td->td_ucred, sut.nodename, sizeof(sut.nodename));
  401         strlcpy(sut.release, osrelease, sizeof(sut.release));
  402         strlcpy(sut.version, version, sizeof(sut.version));
  403         strlcpy(sut.machine, machine, sizeof(sut.machine));
  404 
  405         return copyout((caddr_t) &sut, (caddr_t) uap->name,
  406                        sizeof(struct svr4_utsname));
  407 }
  408 
  409 int
  410 svr4_sys_systeminfo(td, uap)
  411         struct thread *td;
  412         struct svr4_sys_systeminfo_args *uap;
  413 {
  414         char            *str = NULL;
  415         int             error = 0;
  416         register_t      *retval = td->td_retval;
  417         size_t          len = 0;
  418         char            buf[1];   /* XXX NetBSD uses 256, but that seems
  419                                      like awfully excessive kstack usage
  420                                      for an empty string... */
  421         u_int           rlen = uap->len;
  422 
  423         switch (uap->what) {
  424         case SVR4_SI_SYSNAME:
  425                 str = ostype;
  426                 break;
  427 
  428         case SVR4_SI_HOSTNAME:
  429                 str = hostname;
  430                 break;
  431 
  432         case SVR4_SI_RELEASE:
  433                 str = osrelease;
  434                 break;
  435 
  436         case SVR4_SI_VERSION:
  437                 str = version;
  438                 break;
  439 
  440         case SVR4_SI_MACHINE:
  441                 str = machine;
  442                 break;
  443 
  444         case SVR4_SI_ARCHITECTURE:
  445                 str = machine;
  446                 break;
  447 
  448         case SVR4_SI_HW_SERIAL:
  449                 str = "";
  450                 break;
  451 
  452         case SVR4_SI_HW_PROVIDER:
  453                 str = ostype;
  454                 break;
  455 
  456         case SVR4_SI_SRPC_DOMAIN:
  457                 str = domainname;
  458                 break;
  459 
  460         case SVR4_SI_PLATFORM:
  461 #ifdef __i386__
  462                 str = "i86pc";
  463 #else
  464                 str = "unknown";
  465 #endif
  466                 break;
  467 
  468         case SVR4_SI_KERB_REALM:
  469                 str = "unsupported";
  470                 break;
  471 #if defined(WHY_DOES_AN_EMULATOR_WANT_TO_SET_HOSTNAMES)
  472         case SVR4_SI_SET_HOSTNAME:
  473                 if ((error = suser(td)) != 0)
  474                         return error;
  475                 name = KERN_HOSTNAME;
  476                 return kern_sysctl(&name, 1, 0, 0, uap->buf, rlen, td);
  477 
  478         case SVR4_SI_SET_SRPC_DOMAIN:
  479                 if ((error = suser(td)) != 0)
  480                         return error;
  481                 name = KERN_NISDOMAINNAME;
  482                 return kern_sysctl(&name, 1, 0, 0, uap->buf, rlen, td);
  483 #else
  484         case SVR4_SI_SET_HOSTNAME:
  485         case SVR4_SI_SET_SRPC_DOMAIN:
  486                 /* FALLTHROUGH */
  487 #endif
  488         case SVR4_SI_SET_KERB_REALM:
  489                 return 0;
  490 
  491         default:
  492                 DPRINTF(("Bad systeminfo command %d\n", uap->what));
  493                 return ENOSYS;
  494         }
  495 
  496         if (str) {
  497                 len = strlen(str) + 1;
  498                 if (len > rlen)
  499                         len = rlen;
  500 
  501                 if (uap->buf) {
  502                         error = copyout(str, uap->buf, len);
  503                         if (error)
  504                                 return error;
  505                         /* make sure we are NULL terminated */
  506                         buf[0] = '\0';
  507                         error = copyout(buf, &(uap->buf[len - 1]), 1);
  508                 }
  509                 else
  510                         error = 0;
  511         }
  512         /* XXX NetBSD has hostname setting stuff here.  Why would an emulator
  513            want to do that? */
  514 
  515         *retval = len;
  516         return error;
  517 }
  518 
  519 int
  520 svr4_sys_utssys(td, uap)
  521         register struct thread *td;
  522         struct svr4_sys_utssys_args *uap;
  523 {
  524         switch (uap->sel) {
  525         case 0:         /* uname(2)  */
  526                 {
  527                         struct svr4_sys_uname_args ua;
  528                         ua.name = uap->a1;
  529                         return svr4_sys_uname(td, &ua);
  530                 }
  531 
  532         case 2:         /* ustat(2)  */
  533                 {
  534                         struct svr4_ustat_args ua;
  535                         ua.dev = (svr4_dev_t) uap->a2;
  536                         ua.name = uap->a1;
  537                         return svr4_ustat(td, &ua);
  538                 }
  539 
  540         case 3:         /* fusers(2) */
  541                 return ENOSYS;
  542 
  543         default:
  544                 return ENOSYS;
  545         }
  546         return ENOSYS;
  547 }
  548 
  549 
  550 int
  551 svr4_sys_utime(td, uap)
  552         register struct thread *td;
  553         struct svr4_sys_utime_args *uap;
  554 {
  555         struct svr4_utimbuf ub;
  556         struct timeval tbuf[2], *tp;
  557         char *path;
  558         int error;
  559      
  560         if (uap->ubuf != NULL) {
  561                 error = copyin(uap->ubuf, &ub, sizeof(ub));
  562                 if (error)
  563                         return (error);
  564                 tbuf[0].tv_sec = ub.actime;
  565                 tbuf[0].tv_usec = 0;
  566                 tbuf[1].tv_sec = ub.modtime;
  567                 tbuf[1].tv_usec = 0;
  568                 tp = tbuf;
  569         } else
  570                 tp = NULL;
  571 
  572         CHECKALTEXIST(td, uap->path, &path);
  573         error = kern_utimes(td, path, UIO_SYSSPACE, tp, UIO_SYSSPACE);
  574         free(path, M_TEMP);
  575         return (error);
  576 }
  577 
  578 
  579 int
  580 svr4_sys_utimes(td, uap)
  581         register struct thread *td;
  582         struct svr4_sys_utimes_args *uap;
  583 {
  584         char *path;
  585         int error;
  586 
  587         CHECKALTEXIST(td, uap->path, &path);
  588         error = kern_utimes(td, path, UIO_SYSSPACE, uap->tptr, UIO_USERSPACE);
  589         free(path, M_TEMP);
  590         return (error);
  591 }
  592 
  593 static int
  594 svr4_to_bsd_pathconf(name)
  595         int name;
  596 {
  597         switch (name) {
  598         case SVR4_PC_LINK_MAX:
  599                 return _PC_LINK_MAX;
  600 
  601         case SVR4_PC_MAX_CANON:
  602                 return _PC_MAX_CANON;
  603 
  604         case SVR4_PC_MAX_INPUT:
  605                 return _PC_MAX_INPUT;
  606 
  607         case SVR4_PC_NAME_MAX:
  608                 return _PC_NAME_MAX;
  609 
  610         case SVR4_PC_PATH_MAX:
  611                 return _PC_PATH_MAX;
  612 
  613         case SVR4_PC_PIPE_BUF:
  614                 return _PC_PIPE_BUF;
  615 
  616         case SVR4_PC_NO_TRUNC:
  617                 return _PC_NO_TRUNC;
  618 
  619         case SVR4_PC_VDISABLE:
  620                 return _PC_VDISABLE;
  621 
  622         case SVR4_PC_CHOWN_RESTRICTED:
  623                 return _PC_CHOWN_RESTRICTED;
  624         case SVR4_PC_SYNC_IO:
  625 #if defined(_PC_SYNC_IO)
  626                 return _PC_SYNC_IO;
  627 #else
  628                 return 0;
  629 #endif
  630         case SVR4_PC_ASYNC_IO:
  631         case SVR4_PC_PRIO_IO:
  632                 /* Not supported */
  633                 return 0;
  634 
  635         default:
  636                 /* Invalid */
  637                 return -1;
  638         }
  639 }
  640 
  641 
  642 int
  643 svr4_sys_pathconf(td, uap)
  644         register struct thread *td;
  645         struct svr4_sys_pathconf_args *uap;
  646 {
  647         char *path;
  648         int error, name;
  649 
  650         name = svr4_to_bsd_pathconf(uap->name);
  651 
  652         switch (name) {
  653         case -1:
  654                 td->td_retval[0] = -1;
  655                 return (EINVAL);
  656         case 0:
  657                 td->td_retval[0] = 0;
  658                 return (0);
  659         default:
  660                 CHECKALTEXIST(td, uap->path, &path);
  661                 error = kern_pathconf(td, path, UIO_SYSSPACE, name);
  662                 free(path, M_TEMP);
  663                 return (error);
  664         }
  665 }
  666 
  667 
  668 int
  669 svr4_sys_fpathconf(td, uap)
  670         register struct thread *td;
  671         struct svr4_sys_fpathconf_args *uap;
  672 {
  673         register_t      *retval = td->td_retval;
  674 
  675         uap->name = svr4_to_bsd_pathconf(uap->name);
  676 
  677         switch (uap->name) {
  678         case -1:
  679                 *retval = -1;
  680                 return EINVAL;
  681         case 0:
  682                 *retval = 0;
  683                 return 0;
  684         default:
  685                 return fpathconf(td, (struct fpathconf_args *)uap);
  686         }
  687 }
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FreeBSD/Linux Kernel Cross Reference sys/compat/svr4/svr4_stat.c

FreeBSD/Linux Kernel Cross Reference
sys/compat/svr4/svr4_stat.c
