src/sys/pioctl.c

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 /*
  11  * The lpioctl system call.  (pioctl is handled by the rmtsys layer and turned
  12  * into either lpioctl or a remote call as appropriate.)  It is kept separate
  13  * to allow for the creation of the libkopenafs shared library without
  14  * including the other system calls.
  15  */
  16
  17 #include <afsconfig.h>
  18 #include <afs/param.h>
  19
  20 #include <roken.h>
  21
  22 #include <afs/afs_args.h>
  23
  24 #include "afssyscalls.h"
  25 #include "sys_prototypes.h"
  26
  27 #ifdef AFS_AIX32_ENV
  28 /*
  29  * in VRMIX, system calls look just like function calls, so we don't
  30  * need to do anything!
  31  */
  32
  33 #elif defined(AFS_SGI_ENV)
  34
  35 #pragma weak xlpioctl = lpioctl
  36
  37 int
  38 lpioctl(char *path, int cmd, void *cmarg, int follow)
  39 {
  40     return (syscall(AFS_PIOCTL, path, cmd, cmarg, follow));
  41 }
  42
  43 #elif defined(AFS_LINUX20_ENV)
  44
  45 int
  46 lpioctl(char *path, int cmd, void *cmarg, int follow)
  47 {
  48     int errcode = 0;
  49     int rval;
  50
  51     rval = proc_afs_syscall(AFSCALL_PIOCTL, (long)path, cmd, (long)cmarg,
  52                             follow, &errcode);
  53
  54     if(rval) {
  55 # ifdef AFS_SYSCALL
  56         errcode = syscall(AFS_SYSCALL, AFSCALL_PIOCTL, path, cmd, cmarg,
  57                           follow);
  58 # else
  59         errcode = -1;
  60 # endif
  61     }
  62
  63     return (errcode);
  64 }
  65
  66 #else /* AFS_AIX32_ENV */
  67
  68 int
  69 lpioctl(char *path, int cmd, void *cmarg, int follow)
  70 {
  71     int errcode = 0;
  72     /* As kauth/user.c says, handle smoothly the case where no AFS system call
  73      * exists (yet). */
  74     void (*old)(int) = signal(SIGSYS, SIG_IGN);
  75
  76 # if defined(AFS_DARWIN80_ENV) || defined(AFS_SUN511_ENV)
  77     {
  78         int rval;       /* rval and errcode are distinct for pioctl platforms */
  79 #  if defined(AFS_DARWIN80_ENV)
  80         rval = ioctl_afs_syscall(AFSCALL_PIOCTL, (long)path, cmd, (long)cmarg,
  81                                 follow, 0, 0, &errcode);
  82 #  elif defined(AFS_SUN511_ENV)
  83         rval = ioctl_sun_afs_syscall(AFSCALL_PIOCTL, (uintptr_t)path, cmd,
  84                                     (uintptr_t)cmarg, follow, 0, 0, &errcode);
  85 #  endif  /* !AFS_DARWIN80_ENV */
  86         /* non-zero rval takes precedence over errcode */
  87         if (rval)
  88             errcode = rval;
  89     }
  90 # else   /* ! AFS_DARWIN80_ENV || AFS_SUN511_ENV */
  91     errcode = syscall(AFS_SYSCALL, AFSCALL_PIOCTL, path, cmd, cmarg, follow);
  92 # endif
  93
  94     signal(SIGSYS, old);
  95
  96     return (errcode);
  97 }
  98
  99 #endif /* !AFS_AIX32_ENV */