gdb/common/fileio.c

   1 /* File-I/O functions for GDB, the GNU debugger.
   2
   3    Copyright (C) 2003-2015 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "common-defs.h"
  21 #include "fileio.h"
  22 #include <sys/stat.h>
  23
  24 /* See fileio.h.  */
  25
  26 int
  27 host_to_fileio_error (int error)
  28 {
  29   switch (error)
  30     {
  31       case EPERM:
  32         return FILEIO_EPERM;
  33       case ENOENT:
  34         return FILEIO_ENOENT;
  35       case EINTR:
  36         return FILEIO_EINTR;
  37       case EIO:
  38         return FILEIO_EIO;
  39       case EBADF:
  40         return FILEIO_EBADF;
  41       case EACCES:
  42         return FILEIO_EACCES;
  43       case EFAULT:
  44         return FILEIO_EFAULT;
  45       case EBUSY:
  46         return FILEIO_EBUSY;
  47       case EEXIST:
  48         return FILEIO_EEXIST;
  49       case ENODEV:
  50         return FILEIO_ENODEV;
  51       case ENOTDIR:
  52         return FILEIO_ENOTDIR;
  53       case EISDIR:
  54         return FILEIO_EISDIR;
  55       case EINVAL:
  56         return FILEIO_EINVAL;
  57       case ENFILE:
  58         return FILEIO_ENFILE;
  59       case EMFILE:
  60         return FILEIO_EMFILE;
  61       case EFBIG:
  62         return FILEIO_EFBIG;
  63       case ENOSPC:
  64         return FILEIO_ENOSPC;
  65       case ESPIPE:
  66         return FILEIO_ESPIPE;
  67       case EROFS:
  68         return FILEIO_EROFS;
  69       case ENOSYS:
  70         return FILEIO_ENOSYS;
  71       case ENAMETOOLONG:
  72         return FILEIO_ENAMETOOLONG;
  73     }
  74   return FILEIO_EUNKNOWN;
  75 }
  76
  77 /* Convert a host-format mode_t into a bitmask of File-I/O flags.  */
  78
  79 static LONGEST
  80 fileio_mode_pack (mode_t mode)
  81 {
  82   mode_t tmode = 0;
  83
  84   if (S_ISREG (mode))
  85     tmode |= FILEIO_S_IFREG;
  86   if (S_ISDIR (mode))
  87     tmode |= FILEIO_S_IFDIR;
  88   if (S_ISCHR (mode))
  89     tmode |= FILEIO_S_IFCHR;
  90   if (mode & S_IRUSR)
  91     tmode |= FILEIO_S_IRUSR;
  92   if (mode & S_IWUSR)
  93     tmode |= FILEIO_S_IWUSR;
  94   if (mode & S_IXUSR)
  95     tmode |= FILEIO_S_IXUSR;
  96 #ifdef S_IRGRP
  97   if (mode & S_IRGRP)
  98     tmode |= FILEIO_S_IRGRP;
  99 #endif
 100 #ifdef S_IWRGRP
 101   if (mode & S_IWGRP)
 102     tmode |= FILEIO_S_IWGRP;
 103 #endif
 104 #ifdef S_IXGRP
 105   if (mode & S_IXGRP)
 106     tmode |= FILEIO_S_IXGRP;
 107 #endif
 108   if (mode & S_IROTH)
 109     tmode |= FILEIO_S_IROTH;
 110 #ifdef S_IWOTH
 111   if (mode & S_IWOTH)
 112     tmode |= FILEIO_S_IWOTH;
 113 #endif
 114 #ifdef S_IXOTH
 115   if (mode & S_IXOTH)
 116     tmode |= FILEIO_S_IXOTH;
 117 #endif
 118   return tmode;
 119 }
 120
 121 /* Pack a host-format mode_t into an fio_mode_t.  */
 122
 123 static void
 124 host_to_fileio_mode (mode_t num, fio_mode_t fnum)
 125 {
 126   host_to_bigendian (fileio_mode_pack (num), (char *) fnum, 4);
 127 }
 128
 129 /* Pack a host-format integer into an fio_ulong_t.  */
 130
 131 static void
 132 host_to_fileio_ulong (LONGEST num, fio_ulong_t fnum)
 133 {
 134   host_to_bigendian (num, (char *) fnum, 8);
 135 }
 136
 137 /* See fileio.h.  */
 138
 139 void
 140 host_to_fileio_stat (struct stat *st, struct fio_stat *fst)
 141 {
 142   LONGEST blksize;
 143
 144   host_to_fileio_uint ((long) st->st_dev, fst->fst_dev);
 145   host_to_fileio_uint ((long) st->st_ino, fst->fst_ino);
 146   host_to_fileio_mode (st->st_mode, fst->fst_mode);
 147   host_to_fileio_uint ((long) st->st_nlink, fst->fst_nlink);
 148   host_to_fileio_uint ((long) st->st_uid, fst->fst_uid);
 149   host_to_fileio_uint ((long) st->st_gid, fst->fst_gid);
 150   host_to_fileio_uint ((long) st->st_rdev, fst->fst_rdev);
 151   host_to_fileio_ulong ((LONGEST) st->st_size, fst->fst_size);
 152 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
 153   blksize = st->st_blksize;
 154 #else
 155   blksize = 512;
 156 #endif
 157   host_to_fileio_ulong (blksize, fst->fst_blksize);
 158 #if HAVE_STRUCT_STAT_ST_BLOCKS
 159   host_to_fileio_ulong ((LONGEST) st->st_blocks, fst->fst_blocks);
 160 #else
 161   /* FIXME: This is correct for DJGPP, but other systems that don't
 162      have st_blocks, if any, might prefer 512 instead of st_blksize.
 163      (eliz, 30-12-2003)  */
 164   host_to_fileio_ulong (((LONGEST) st->st_size + blksize - 1)
 165                         / blksize,
 166                         fst->fst_blocks);
 167 #endif
 168   host_to_fileio_time (st->st_atime, fst->fst_atime);
 169   host_to_fileio_time (st->st_mtime, fst->fst_mtime);
 170   host_to_fileio_time (st->st_ctime, fst->fst_ctime);
 171 }