support/unistd.c

   1 /*
   2  * <unistd.h> wrapper functions.
   3  *
   4  * Authors:
   5  *   Jonathan Pryor (jonpryor@vt.edu)
   6  *
   7  * Copyright (C) 2004 Jonathan Pryor
   8  */
   9
  10 #ifndef _GNU_SOURCE
  11 #define _GNU_SOURCE
  12 #endif /* ndef _GNU_SOURCE */
  13
  14 #include <sys/types.h>
  15 #include <sys/stat.h>
  16 #include <unistd.h>
  17 #include <fcntl.h>
  18 #include <errno.h>
  19 #include <limits.h>
  20 #include <string.h>     /* for swab(3) on Mac OS X */
  21
  22 #include "map.h"
  23 #include "mph.h"
  24
  25 G_BEGIN_DECLS
  26
  27 mph_off_t
  28 Mono_Posix_Syscall_lseek (gint32 fd, mph_off_t offset, gint32 whence)
  29 {
  30         short _whence;
  31         mph_return_if_off_t_overflow (offset);
  32         if (Mono_Posix_FromSeekFlags (whence, &_whence) == -1)
  33                 return -1;
  34         whence = _whence;
  35
  36         return lseek (fd, offset, whence);
  37 }
  38
  39 mph_ssize_t
  40 Mono_Posix_Syscall_read (gint32 fd, void *buf, mph_size_t count)
  41 {
  42         mph_return_if_size_t_overflow (count);
  43         return read (fd, buf, (size_t) count);
  44 }
  45
  46 mph_ssize_t
  47 Mono_Posix_Syscall_write (gint32 fd, const void *buf, mph_size_t count)
  48 {
  49         mph_return_if_size_t_overflow (count);
  50         return write (fd, buf, (size_t) count);
  51 }
  52
  53 mph_ssize_t
  54 Mono_Posix_Syscall_pread (gint32 fd, void *buf, mph_size_t count, mph_off_t offset)
  55 {
  56         mph_return_if_size_t_overflow (count);
  57         mph_return_if_off_t_overflow (offset);
  58
  59         return pread (fd, buf, (size_t) count, (off_t) offset);
  60 }
  61
  62 mph_ssize_t
  63 Mono_Posix_Syscall_pwrite (gint32 fd, const void *buf, mph_size_t count, mph_off_t offset)
  64 {
  65         mph_return_if_size_t_overflow (count);
  66         mph_return_if_off_t_overflow (offset);
  67
  68         return pwrite (fd, buf, (size_t) count, (off_t) offset);
  69 }
  70
  71 gint32
  72 Mono_Posix_Syscall_pipe (gint32 *reading, gint32 *writing)
  73 {
  74         int filedes[2] = {-1, -1};
  75         int r;
  76
  77         if (reading == NULL || writing == NULL) {
  78                 errno = EFAULT;
  79                 return -1;
  80         }
  81
  82         r = pipe (filedes);
  83
  84         *reading = filedes[0];
  85         *writing = filedes[1];
  86         return r;
  87 }
  88
  89 char*
  90 Mono_Posix_Syscall_getcwd (char *buf, mph_size_t size)
  91 {
  92         mph_return_val_if_size_t_overflow (size, NULL);
  93         return getcwd (buf, (size_t) size);
  94 }
  95
  96 gint64
  97 Mono_Posix_Syscall_fpathconf (int filedes, int name)
  98 {
  99         if (Mono_Posix_FromPathConf (name, &name) == -1)
 100                 return -1;
 101         return fpathconf (filedes, name);
 102 }
 103
 104 gint64
 105 Mono_Posix_Syscall_pathconf (char *path, int name)
 106 {
 107         if (Mono_Posix_FromPathConf (name, &name) == -1)
 108                 return -1;
 109         return pathconf (path, name);
 110 }
 111
 112 gint64
 113 Mono_Posix_Syscall_sysconf (int name)
 114 {
 115         if (Mono_Posix_FromSysConf (name, &name) == -1)
 116                 return -1;
 117         return sysconf (name);
 118 }
 119
 120 gint64
 121 Mono_Posix_Syscall_confstr (int name, char *buf, mph_size_t len)
 122 {
 123         mph_return_if_size_t_overflow (len);
 124         if (Mono_Posix_FromConfStr (name, &name) == -1)
 125                 return -1;
 126         return confstr (name, buf, (size_t) len);
 127 }
 128
 129 #ifdef HAVE_TTYNAME_R
 130 gint32
 131 Mono_Posix_Syscall_ttyname_r (int fd, char *buf, mph_size_t len)
 132 {
 133         mph_return_if_size_t_overflow (len);
 134         return ttyname_r (fd, buf, (size_t) len);
 135 }
 136 #endif /* ndef HAVE_TTYNAME_R */
 137
 138 gint32
 139 Mono_Posix_Syscall_readlink (const char *path, char *buf, mph_size_t len)
 140 {
 141         mph_return_if_size_t_overflow (len);
 142         return readlink (path, buf, (size_t) len);
 143 }
 144
 145 gint32
 146 Mono_Posix_Syscall_getlogin_r (char *buf, mph_size_t len)
 147 {
 148         mph_return_if_size_t_overflow (len);
 149         return getlogin_r (buf, (size_t) len);
 150 }
 151
 152 gint32
 153 Mono_Posix_Syscall_gethostname (char *buf, mph_size_t len)
 154 {
 155         mph_return_if_size_t_overflow (len);
 156         return gethostname (buf, (size_t) len);
 157 }
 158
 159 gint32
 160 Mono_Posix_Syscall_sethostname (const char *name, mph_size_t len)
 161 {
 162         mph_return_if_size_t_overflow (len);
 163         return sethostname (name, (size_t) len);
 164 }
 165
 166 gint64
 167 Mono_Posix_Syscall_gethostid (void)
 168 {
 169         return gethostid ();
 170 }
 171
 172 #ifdef HAVE_SETHOSTID
 173 gint32
 174 Mono_Posix_Syscall_sethostid (gint64 hostid)
 175 {
 176         mph_return_if_long_overflow (hostid);
 177 #ifdef MPH_ON_BSD
 178         sethostid ((long) hostid);
 179         return 0;
 180 #else
 181         return sethostid ((long) hostid);
 182 #endif
 183 }
 184 #endif /* def HAVE_SETHOSTID */
 185
 186 gint32
 187 Mono_Posix_Syscall_getdomainname (char *name, mph_size_t len)
 188 {
 189         mph_return_if_size_t_overflow (len);
 190         return getdomainname (name, (size_t) len);
 191 }
 192
 193 gint32
 194 Mono_Posix_Syscall_setdomainname (const char *name, mph_size_t len)
 195 {
 196         mph_return_if_size_t_overflow (len);
 197         return setdomainname (name, (size_t) len);
 198 }
 199
 200 gint32
 201 Mono_Posix_Syscall_truncate (const char *path, mph_off_t length)
 202 {
 203         mph_return_if_off_t_overflow (length);
 204         return truncate (path, (off_t) length);
 205 }
 206
 207 gint32
 208 Mono_Posix_Syscall_ftruncate (int fd, mph_off_t length)
 209 {
 210         mph_return_if_off_t_overflow (length);
 211         return ftruncate (fd, (off_t) length);
 212 }
 213
 214 gint32
 215 Mono_Posix_Syscall_lockf (int fd, int cmd, mph_off_t len)
 216 {
 217         mph_return_if_off_t_overflow (len);
 218         if (Mono_Posix_FromLockFlags (cmd, &cmd) == -1)
 219                 return -1;
 220         return lockf (fd, cmd, (off_t) len);
 221 }
 222
 223 void
 224 Mono_Posix_Syscall_swab (void *from, void *to, mph_ssize_t n)
 225 {
 226         if (mph_have_long_overflow (n))
 227                 return;
 228         swab (from, to, (ssize_t) n);
 229 }
 230
 231 G_END_DECLS
 232
 233 /*
 234  * vim: noexpandtab
 235  */