support/unistd.c

   1 /*
   2  * <unistd.h> wrapper functions.
   3  *
   4  * Authors:
   5  *   Jonathan Pryor (jonpryor@vt.edu)
   6  *
   7  * Copyright (C) 2004-2006 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         mph_return_if_off_t_overflow (offset);
  31
  32         return lseek (fd, offset, whence);
  33 }
  34
  35 mph_ssize_t
  36 Mono_Posix_Syscall_read (gint32 fd, void *buf, mph_size_t count)
  37 {
  38         mph_return_if_size_t_overflow (count);
  39         return read (fd, buf, (size_t) count);
  40 }
  41
  42 mph_ssize_t
  43 Mono_Posix_Syscall_write (gint32 fd, void *buf, mph_size_t count)
  44 {
  45         mph_return_if_size_t_overflow (count);
  46         return write (fd, buf, (size_t) count);
  47 }
  48
  49 mph_ssize_t
  50 Mono_Posix_Syscall_pread (gint32 fd, void *buf, mph_size_t count, mph_off_t offset)
  51 {
  52         mph_return_if_size_t_overflow (count);
  53         mph_return_if_off_t_overflow (offset);
  54
  55         return pread (fd, buf, (size_t) count, (off_t) offset);
  56 }
  57
  58 mph_ssize_t
  59 Mono_Posix_Syscall_pwrite (gint32 fd, void *buf, mph_size_t count, mph_off_t offset)
  60 {
  61         mph_return_if_size_t_overflow (count);
  62         mph_return_if_off_t_overflow (offset);
  63
  64         return pwrite (fd, buf, (size_t) count, (off_t) offset);
  65 }
  66
  67 gint32
  68 Mono_Posix_Syscall_pipe (gint32 *reading, gint32 *writing)
  69 {
  70         int filedes[2] = {-1, -1};
  71         int r;
  72
  73         if (reading == NULL || writing == NULL) {
  74                 errno = EFAULT;
  75                 return -1;
  76         }
  77
  78         r = pipe (filedes);
  79
  80         *reading = filedes[0];
  81         *writing = filedes[1];
  82         return r;
  83 }
  84
  85 void*
  86 Mono_Posix_Syscall_getcwd (char *buf, mph_size_t size)
  87 {
  88         mph_return_val_if_size_t_overflow (size, NULL);
  89         return getcwd (buf, (size_t) size);
  90 }
  91
  92 gint64
  93 Mono_Posix_Syscall_fpathconf (int filedes, int name, int defaultError)
  94 {
  95         errno = defaultError;
  96         if (Mono_Posix_FromPathconfName (name, &name) == -1)
  97                 return -1;
  98         return fpathconf (filedes, name);
  99 }
 100
 101 gint64
 102 Mono_Posix_Syscall_pathconf (const char *path, int name, int defaultError)
 103 {
 104         errno = defaultError;
 105         if (Mono_Posix_FromPathconfName (name, &name) == -1)
 106                 return -1;
 107         return pathconf (path, name);
 108 }
 109
 110 gint64
 111 Mono_Posix_Syscall_sysconf (int name, int defaultError)
 112 {
 113         errno = defaultError;
 114         if (Mono_Posix_FromSysconfName (name, &name) == -1)
 115                 return -1;
 116         return sysconf (name);
 117 }
 118
 119 mph_size_t
 120 Mono_Posix_Syscall_confstr (int name, char *buf, mph_size_t len)
 121 {
 122         mph_return_if_size_t_overflow (len);
 123         if (Mono_Posix_FromConfstrName (name, &name) == -1)
 124                 return -1;
 125         return confstr (name, buf, (size_t) len);
 126 }
 127
 128 #ifdef HAVE_TTYNAME_R
 129 gint32
 130 Mono_Posix_Syscall_ttyname_r (int fd, char *buf, mph_size_t len)
 131 {
 132         mph_return_if_size_t_overflow (len);
 133         return ttyname_r (fd, buf, (size_t) len);
 134 }
 135 #endif /* ndef HAVE_TTYNAME_R */
 136
 137 gint32
 138 Mono_Posix_Syscall_readlink (const char *path, char *buf, mph_size_t len)
 139 {
 140         int r;
 141         mph_return_if_size_t_overflow (len);
 142         r = readlink (path, buf, (size_t) len);
 143         if (r >= 0 && r < len)
 144                 buf [r] = '\0';
 145         return r;
 146 }
 147
 148 gint32
 149 Mono_Posix_Syscall_getlogin_r (char *buf, mph_size_t len)
 150 {
 151         mph_return_if_size_t_overflow (len);
 152         return getlogin_r (buf, (size_t) len);
 153 }
 154
 155 gint32
 156 Mono_Posix_Syscall_gethostname (char *buf, mph_size_t len)
 157 {
 158         mph_return_if_size_t_overflow (len);
 159         return gethostname (buf, (size_t) len);
 160 }
 161
 162 gint32
 163 Mono_Posix_Syscall_sethostname (const char *name, mph_size_t len)
 164 {
 165         mph_return_if_size_t_overflow (len);
 166         return sethostname (name, (size_t) len);
 167 }
 168
 169 gint64
 170 Mono_Posix_Syscall_gethostid (void)
 171 {
 172         return gethostid ();
 173 }
 174
 175 #ifdef HAVE_SETHOSTID
 176 gint32
 177 Mono_Posix_Syscall_sethostid (gint64 hostid)
 178 {
 179         mph_return_if_long_overflow (hostid);
 180 #ifdef MPH_ON_BSD
 181         sethostid ((long) hostid);
 182         return 0;
 183 #else
 184         return sethostid ((long) hostid);
 185 #endif
 186 }
 187 #endif /* def HAVE_SETHOSTID */
 188
 189 #ifdef HAVE_GETDOMAINNAME
 190 gint32
 191 Mono_Posix_Syscall_getdomainname (char *name, mph_size_t len)
 192 {
 193         mph_return_if_size_t_overflow (len);
 194         return getdomainname (name, (size_t) len);
 195 }
 196 #endif /* def HAVE_GETDOMAINNAME */
 197
 198 #ifdef HAVE_SETDOMAINNAME
 199 gint32
 200 Mono_Posix_Syscall_setdomainname (const char *name, mph_size_t len)
 201 {
 202         mph_return_if_size_t_overflow (len);
 203         return setdomainname (name, (size_t) len);
 204 }
 205 #endif /* def HAVE_SETDOMAINNAME */
 206
 207 gint32
 208 Mono_Posix_Syscall_truncate (const char *path, mph_off_t length)
 209 {
 210         mph_return_if_off_t_overflow (length);
 211         return truncate (path, (off_t) length);
 212 }
 213
 214 gint32
 215 Mono_Posix_Syscall_ftruncate (int fd, mph_off_t length)
 216 {
 217         mph_return_if_off_t_overflow (length);
 218         return ftruncate (fd, (off_t) length);
 219 }
 220
 221 gint32
 222 Mono_Posix_Syscall_lockf (int fd, int cmd, mph_off_t len)
 223 {
 224         mph_return_if_off_t_overflow (len);
 225         if (Mono_Posix_FromLockfCommand (cmd, &cmd) == -1)
 226                 return -1;
 227         return lockf (fd, cmd, (off_t) len);
 228 }
 229
 230 int
 231 Mono_Posix_Syscall_swab (void *from, void *to, mph_ssize_t n)
 232 {
 233         if (mph_have_long_overflow (n))
 234                 return -1;
 235         swab (from, to, (ssize_t) n);
 236         return 0;
 237 }
 238
 239 int
 240 Mono_Posix_Syscall_setusershell (void)
 241 {
 242         errno = 0;
 243         setusershell ();
 244         return errno == 0 ? 0 : -1;
 245 }
 246
 247 int
 248 Mono_Posix_Syscall_endusershell (void)
 249 {
 250         errno = 0;
 251         endusershell ();
 252         return errno == 0 ? 0 : -1;
 253 }
 254
 255 int
 256 Mono_Posix_Syscall_sync (void)
 257 {
 258         errno = 0;
 259         sync ();
 260         return errno == 0 ? 0 : -1;
 261 }
 262
 263
 264 G_END_DECLS
 265
 266 /*
 267  * vim: noexpandtab
 268  */