gdbsupport/fileio.h

   1 /* File-I/O functions for GDB, the GNU debugger.
   2
   3    Copyright (C) 2003-2023 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 #ifndef COMMON_FILEIO_H
  21 #define COMMON_FILEIO_H
  22
  23 #include <sys/stat.h>
  24
  25 /* The following flags are defined to be independent of the host
  26    as well as the target side implementation of these constants.
  27    All constants are defined with a leading FILEIO_ in the name
  28    to allow the usage of these constants together with the
  29    corresponding implementation dependent constants in one module. */
  30
  31 /* open(2) flags */
  32 #define FILEIO_O_RDONLY           0x0
  33 #define FILEIO_O_WRONLY           0x1
  34 #define FILEIO_O_RDWR             0x2
  35 #define FILEIO_O_APPEND           0x8
  36 #define FILEIO_O_CREAT          0x200
  37 #define FILEIO_O_TRUNC          0x400
  38 #define FILEIO_O_EXCL           0x800
  39 #define FILEIO_O_SUPPORTED      (FILEIO_O_RDONLY | FILEIO_O_WRONLY| \
  40                                  FILEIO_O_RDWR   | FILEIO_O_APPEND| \
  41                                  FILEIO_O_CREAT  | FILEIO_O_TRUNC| \
  42                                  FILEIO_O_EXCL)
  43
  44 /* mode_t bits */
  45 #define FILEIO_S_IFREG        0100000
  46 #define FILEIO_S_IFDIR         040000
  47 #define FILEIO_S_IFCHR         020000
  48 #define FILEIO_S_IRUSR           0400
  49 #define FILEIO_S_IWUSR           0200
  50 #define FILEIO_S_IXUSR           0100
  51 #define FILEIO_S_IRWXU           0700
  52 #define FILEIO_S_IRGRP            040
  53 #define FILEIO_S_IWGRP            020
  54 #define FILEIO_S_IXGRP            010
  55 #define FILEIO_S_IRWXG            070
  56 #define FILEIO_S_IROTH             04
  57 #define FILEIO_S_IWOTH             02
  58 #define FILEIO_S_IXOTH             01
  59 #define FILEIO_S_IRWXO             07
  60 #define FILEIO_S_SUPPORTED         (FILEIO_S_IFREG|FILEIO_S_IFDIR|  \
  61                                     FILEIO_S_IRWXU|FILEIO_S_IRWXG|  \
  62                                     FILEIO_S_IRWXO)
  63
  64 /* lseek(2) flags */
  65 #define FILEIO_SEEK_SET             0
  66 #define FILEIO_SEEK_CUR             1
  67 #define FILEIO_SEEK_END             2
  68
  69 /* errno values */
  70 enum fileio_error
  71 {
  72   FILEIO_SUCCESS      =    0,
  73   FILEIO_EPERM        =    1,
  74   FILEIO_ENOENT       =    2,
  75   FILEIO_EINTR        =    4,
  76   FILEIO_EIO          =    5,
  77   FILEIO_EBADF        =    9,
  78   FILEIO_EACCES       =   13,
  79   FILEIO_EFAULT       =   14,
  80   FILEIO_EBUSY        =   16,
  81   FILEIO_EEXIST       =   17,
  82   FILEIO_ENODEV       =   19,
  83   FILEIO_ENOTDIR      =   20,
  84   FILEIO_EISDIR       =   21,
  85   FILEIO_EINVAL       =   22,
  86   FILEIO_ENFILE       =   23,
  87   FILEIO_EMFILE       =   24,
  88   FILEIO_EFBIG        =   27,
  89   FILEIO_ENOSPC       =   28,
  90   FILEIO_ESPIPE       =   29,
  91   FILEIO_EROFS        =   30,
  92   FILEIO_ENOSYS       =   88,
  93   FILEIO_ENAMETOOLONG =   91,
  94   FILEIO_EUNKNOWN     = 9999,
  95 };
  96
  97 #define FIO_INT_LEN   4
  98 #define FIO_UINT_LEN  4
  99 #define FIO_MODE_LEN  4
 100 #define FIO_TIME_LEN  4
 101 #define FIO_LONG_LEN  8
 102 #define FIO_ULONG_LEN 8
 103
 104 typedef char fio_int_t[FIO_INT_LEN];
 105 typedef char fio_uint_t[FIO_UINT_LEN];
 106 typedef char fio_mode_t[FIO_MODE_LEN];
 107 typedef char fio_time_t[FIO_TIME_LEN];
 108 typedef char fio_long_t[FIO_LONG_LEN];
 109 typedef char fio_ulong_t[FIO_ULONG_LEN];
 110
 111 /* Struct stat as used in protocol.  For complete independence
 112    of host/target systems, it's defined as an array with offsets
 113    to the members. */
 114
 115 struct fio_stat
 116 {
 117   fio_uint_t  fst_dev;
 118   fio_uint_t  fst_ino;
 119   fio_mode_t  fst_mode;
 120   fio_uint_t  fst_nlink;
 121   fio_uint_t  fst_uid;
 122   fio_uint_t  fst_gid;
 123   fio_uint_t  fst_rdev;
 124   fio_ulong_t fst_size;
 125   fio_ulong_t fst_blksize;
 126   fio_ulong_t fst_blocks;
 127   fio_time_t  fst_atime;
 128   fio_time_t  fst_mtime;
 129   fio_time_t  fst_ctime;
 130 };
 131
 132 struct fio_timeval
 133 {
 134   fio_time_t  ftv_sec;
 135   fio_long_t  ftv_usec;
 136 };
 137
 138 /* Convert a host-format errno value to a File-I/O error number.  */
 139
 140 extern fileio_error host_to_fileio_error (int error);
 141
 142 /* Convert a File-I/O error number to a host-format errno value.  */
 143
 144 extern int fileio_error_to_host (fileio_error errnum);
 145
 146 /* Convert File-I/O open flags FFLAGS to host format, storing
 147    the result in *FLAGS.  Return 0 on success, -1 on error.  */
 148
 149 extern int fileio_to_host_openflags (int fflags, int *flags);
 150
 151 /* Convert File-I/O mode FMODE to host format, storing
 152    the result in *MODE.  Return 0 on success, -1 on error.  */
 153
 154 extern int fileio_to_host_mode (int fmode, mode_t *mode);
 155
 156 /* Pack a host-format integer into a byte buffer in big-endian
 157    format.  BYTES specifies the size of the integer to pack in
 158    bytes.  */
 159
 160 static inline void
 161 host_to_bigendian (LONGEST num, char *buf, int bytes)
 162 {
 163   int i;
 164
 165   for (i = 0; i < bytes; ++i)
 166     buf[i] = (num >> (8 * (bytes - i - 1))) & 0xff;
 167 }
 168
 169 /* Pack a host-format integer into an fio_uint_t.  */
 170
 171 static inline void
 172 host_to_fileio_uint (long num, fio_uint_t fnum)
 173 {
 174   host_to_bigendian ((LONGEST) num, (char *) fnum, 4);
 175 }
 176
 177 /* Pack a host-format time_t into an fio_time_t.  */
 178
 179 static inline void
 180 host_to_fileio_time (time_t num, fio_time_t fnum)
 181 {
 182   host_to_bigendian ((LONGEST) num, (char *) fnum, 4);
 183 }
 184
 185 /* Pack a host-format struct stat into a struct fio_stat.  */
 186
 187 extern void host_to_fileio_stat (struct stat *st, struct fio_stat *fst);
 188
 189 #endif /* COMMON_FILEIO_H */