gdbsupport/fileio.cc

   1 /* File-I/O functions for GDB, the GNU debugger.
   2
   3    Copyright (C) 2003-2022 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 #include <fcntl.h>
  24
  25 /* See fileio.h.  */
  26
  27 fileio_error
  28 host_to_fileio_error (int error)
  29 {
  30   switch (error)
  31     {
  32       case EPERM:
  33         return FILEIO_EPERM;
  34       case ENOENT:
  35         return FILEIO_ENOENT;
  36       case EINTR:
  37         return FILEIO_EINTR;
  38       case EIO:
  39         return FILEIO_EIO;
  40       case EBADF:
  41         return FILEIO_EBADF;
  42       case EACCES:
  43         return FILEIO_EACCES;
  44       case EFAULT:
  45         return FILEIO_EFAULT;
  46       case EBUSY:
  47         return FILEIO_EBUSY;
  48       case EEXIST:
  49         return FILEIO_EEXIST;
  50       case ENODEV:
  51         return FILEIO_ENODEV;
  52       case ENOTDIR:
  53         return FILEIO_ENOTDIR;
  54       case EISDIR:
  55         return FILEIO_EISDIR;
  56       case EINVAL:
  57         return FILEIO_EINVAL;
  58       case ENFILE:
  59         return FILEIO_ENFILE;
  60       case EMFILE:
  61         return FILEIO_EMFILE;
  62       case EFBIG:
  63         return FILEIO_EFBIG;
  64       case ENOSPC:
  65         return FILEIO_ENOSPC;
  66       case ESPIPE:
  67         return FILEIO_ESPIPE;
  68       case EROFS:
  69         return FILEIO_EROFS;
  70       case ENOSYS:
  71         return FILEIO_ENOSYS;
  72       case ENAMETOOLONG:
  73         return FILEIO_ENAMETOOLONG;
  74     }
  75   return FILEIO_EUNKNOWN;
  76 }
  77
  78 /* See fileio.h.  */
  79
  80 int
  81 fileio_error_to_host (fileio_error errnum)
  82 {
  83   switch (errnum)
  84     {
  85       case FILEIO_EPERM:
  86         return EPERM;
  87       case FILEIO_ENOENT:
  88         return ENOENT;
  89       case FILEIO_EINTR:
  90         return EINTR;
  91       case FILEIO_EIO:
  92         return EIO;
  93       case FILEIO_EBADF:
  94         return EBADF;
  95       case FILEIO_EACCES:
  96         return EACCES;
  97       case FILEIO_EFAULT:
  98         return EFAULT;
  99       case FILEIO_EBUSY:
 100         return EBUSY;
 101       case FILEIO_EEXIST:
 102         return EEXIST;
 103       case FILEIO_ENODEV:
 104         return ENODEV;
 105       case FILEIO_ENOTDIR:
 106         return ENOTDIR;
 107       case FILEIO_EISDIR:
 108         return EISDIR;
 109       case FILEIO_EINVAL:
 110         return EINVAL;
 111       case FILEIO_ENFILE:
 112         return ENFILE;
 113       case FILEIO_EMFILE:
 114         return EMFILE;
 115       case FILEIO_EFBIG:
 116         return EFBIG;
 117       case FILEIO_ENOSPC:
 118         return ENOSPC;
 119       case FILEIO_ESPIPE:
 120         return ESPIPE;
 121       case FILEIO_EROFS:
 122         return EROFS;
 123       case FILEIO_ENOSYS:
 124         return ENOSYS;
 125       case FILEIO_ENAMETOOLONG:
 126         return ENAMETOOLONG;
 127     }
 128   return -1;
 129 }
 130
 131 /* See fileio.h.  */
 132
 133 int
 134 fileio_to_host_openflags (int fileio_open_flags, int *open_flags_p)
 135 {
 136   int open_flags = 0;
 137
 138   if (fileio_open_flags & ~FILEIO_O_SUPPORTED)
 139     return -1;
 140
 141   if (fileio_open_flags & FILEIO_O_CREAT)
 142     open_flags |= O_CREAT;
 143   if (fileio_open_flags & FILEIO_O_EXCL)
 144     open_flags |= O_EXCL;
 145   if (fileio_open_flags & FILEIO_O_TRUNC)
 146     open_flags |= O_TRUNC;
 147   if (fileio_open_flags & FILEIO_O_APPEND)
 148     open_flags |= O_APPEND;
 149   if (fileio_open_flags & FILEIO_O_RDONLY)
 150     open_flags |= O_RDONLY;
 151   if (fileio_open_flags & FILEIO_O_WRONLY)
 152     open_flags |= O_WRONLY;
 153   if (fileio_open_flags & FILEIO_O_RDWR)
 154     open_flags |= O_RDWR;
 155   /* On systems supporting binary and text mode, always open files
 156      in binary mode. */
 157 #ifdef O_BINARY
 158   open_flags |= O_BINARY;
 159 #endif
 160
 161   *open_flags_p = open_flags;
 162   return 0;
 163 }
 164
 165 /* See fileio.h.  */
 166
 167 int
 168 fileio_to_host_mode (int fileio_mode, mode_t *mode_p)
 169 {
 170   mode_t mode = 0;
 171
 172   if (fileio_mode & ~FILEIO_S_SUPPORTED)
 173     return -1;
 174
 175   if (fileio_mode & FILEIO_S_IFREG)
 176     mode |= S_IFREG;
 177   if (fileio_mode & FILEIO_S_IFDIR)
 178     mode |= S_IFDIR;
 179   if (fileio_mode & FILEIO_S_IFCHR)
 180     mode |= S_IFCHR;
 181   if (fileio_mode & FILEIO_S_IRUSR)
 182     mode |= S_IRUSR;
 183   if (fileio_mode & FILEIO_S_IWUSR)
 184     mode |= S_IWUSR;
 185   if (fileio_mode & FILEIO_S_IXUSR)
 186     mode |= S_IXUSR;
 187 #ifdef S_IRGRP
 188   if (fileio_mode & FILEIO_S_IRGRP)
 189     mode |= S_IRGRP;
 190 #endif
 191 #ifdef S_IWGRP
 192   if (fileio_mode & FILEIO_S_IWGRP)
 193     mode |= S_IWGRP;
 194 #endif
 195 #ifdef S_IXGRP
 196   if (fileio_mode & FILEIO_S_IXGRP)
 197     mode |= S_IXGRP;
 198 #endif
 199   if (fileio_mode & FILEIO_S_IROTH)
 200     mode |= S_IROTH;
 201 #ifdef S_IWOTH
 202   if (fileio_mode & FILEIO_S_IWOTH)
 203     mode |= S_IWOTH;
 204 #endif
 205 #ifdef S_IXOTH
 206   if (fileio_mode & FILEIO_S_IXOTH)
 207     mode |= S_IXOTH;
 208 #endif
 209
 210   *mode_p = mode;
 211   return 0;
 212 }
 213
 214 /* Convert a host-format mode_t into a bitmask of File-I/O flags.  */
 215
 216 static LONGEST
 217 fileio_mode_pack (mode_t mode)
 218 {
 219   mode_t tmode = 0;
 220
 221   if (S_ISREG (mode))
 222     tmode |= FILEIO_S_IFREG;
 223   if (S_ISDIR (mode))
 224     tmode |= FILEIO_S_IFDIR;
 225   if (S_ISCHR (mode))
 226     tmode |= FILEIO_S_IFCHR;
 227   if (mode & S_IRUSR)
 228     tmode |= FILEIO_S_IRUSR;
 229   if (mode & S_IWUSR)
 230     tmode |= FILEIO_S_IWUSR;
 231   if (mode & S_IXUSR)
 232     tmode |= FILEIO_S_IXUSR;
 233 #ifdef S_IRGRP
 234   if (mode & S_IRGRP)
 235     tmode |= FILEIO_S_IRGRP;
 236 #endif
 237 #ifdef S_IWGRP
 238   if (mode & S_IWGRP)
 239     tmode |= FILEIO_S_IWGRP;
 240 #endif
 241 #ifdef S_IXGRP
 242   if (mode & S_IXGRP)
 243     tmode |= FILEIO_S_IXGRP;
 244 #endif
 245   if (mode & S_IROTH)
 246     tmode |= FILEIO_S_IROTH;
 247 #ifdef S_IWOTH
 248   if (mode & S_IWOTH)
 249     tmode |= FILEIO_S_IWOTH;
 250 #endif
 251 #ifdef S_IXOTH
 252   if (mode & S_IXOTH)
 253     tmode |= FILEIO_S_IXOTH;
 254 #endif
 255   return tmode;
 256 }
 257
 258 /* Pack a host-format mode_t into an fio_mode_t.  */
 259
 260 static void
 261 host_to_fileio_mode (mode_t num, fio_mode_t fnum)
 262 {
 263   host_to_bigendian (fileio_mode_pack (num), (char *) fnum, 4);
 264 }
 265
 266 /* Pack a host-format integer into an fio_ulong_t.  */
 267
 268 static void
 269 host_to_fileio_ulong (LONGEST num, fio_ulong_t fnum)
 270 {
 271   host_to_bigendian (num, (char *) fnum, 8);
 272 }
 273
 274 /* See fileio.h.  */
 275
 276 void
 277 host_to_fileio_stat (struct stat *st, struct fio_stat *fst)
 278 {
 279   LONGEST blksize;
 280
 281   host_to_fileio_uint ((long) st->st_dev, fst->fst_dev);
 282   host_to_fileio_uint ((long) st->st_ino, fst->fst_ino);
 283   host_to_fileio_mode (st->st_mode, fst->fst_mode);
 284   host_to_fileio_uint ((long) st->st_nlink, fst->fst_nlink);
 285   host_to_fileio_uint ((long) st->st_uid, fst->fst_uid);
 286   host_to_fileio_uint ((long) st->st_gid, fst->fst_gid);
 287   host_to_fileio_uint ((long) st->st_rdev, fst->fst_rdev);
 288   host_to_fileio_ulong ((LONGEST) st->st_size, fst->fst_size);
 289 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
 290   blksize = st->st_blksize;
 291 #else
 292   blksize = 512;
 293 #endif
 294   host_to_fileio_ulong (blksize, fst->fst_blksize);
 295 #if HAVE_STRUCT_STAT_ST_BLOCKS
 296   host_to_fileio_ulong ((LONGEST) st->st_blocks, fst->fst_blocks);
 297 #else
 298   /* FIXME: This is correct for DJGPP, but other systems that don't
 299      have st_blocks, if any, might prefer 512 instead of st_blksize.
 300      (eliz, 30-12-2003)  */
 301   host_to_fileio_ulong (((LONGEST) st->st_size + blksize - 1)
 302                         / blksize,
 303                         fst->fst_blocks);
 304 #endif
 305   host_to_fileio_time (st->st_atime, fst->fst_atime);
 306   host_to_fileio_time (st->st_mtime, fst->fst_mtime);
 307   host_to_fileio_time (st->st_ctime, fst->fst_ctime);
 308 }