support/fcntl.c

   1 /*
   2  * <fcntl.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
  13
  14 #include <sys/types.h>
  15 #include <sys/stat.h>
  16 #include <unistd.h>
  17 #include <fcntl.h>
  18 #include <errno.h>
  19
  20 #include "map.h"
  21 #include "mph.h"
  22
  23 G_BEGIN_DECLS
  24
  25 gint32
  26 Mono_Posix_Syscall_fcntl (gint32 fd, gint32 cmd)
  27 {
  28         if (Mono_Posix_FromFcntlCommand (cmd, &cmd) == -1)
  29                 return -1;
  30         return fcntl (fd, cmd);
  31 }
  32
  33 gint32
  34 Mono_Posix_Syscall_fcntl_arg (gint32 fd, gint32 cmd, gint64 arg)
  35 {
  36         long _arg;
  37         gint32 _cmd;
  38
  39         mph_return_if_long_overflow (arg);
  40
  41 #ifdef F_NOTIFY
  42         if (cmd == F_NOTIFY) {
  43                 int _argi;
  44                 if (Mono_Posix_FromDirectoryNotifyFlags (arg, &_argi) == -1) {
  45                         return -1;
  46                 }
  47                 _arg = _argi;
  48         }
  49         else
  50 #endif
  51                 _arg = (long) arg;
  52
  53         if (Mono_Posix_FromFcntlCommand (cmd, &_cmd) == -1)
  54                 return -1;
  55         return fcntl (fd, cmd, _arg);
  56 }
  57
  58 gint32
  59 Mono_Posix_Syscall_fcntl_lock (gint32 fd, gint32 cmd, struct Mono_Posix_Flock *lock)
  60 {
  61         struct flock _lock;
  62         int r;
  63
  64         if (lock == NULL) {
  65                 errno = EFAULT;
  66                 return -1;
  67         }
  68
  69         if (Mono_Posix_FromFlock (lock, &_lock) == -1)
  70                 return -1;
  71
  72         if (Mono_Posix_FromFcntlCommand (cmd, &cmd) == -1)
  73                 return -1;
  74
  75         r = fcntl (fd, cmd, &_lock);
  76
  77         if (Mono_Posix_ToFlock (&_lock, lock) == -1)
  78                 return -1;
  79
  80         return r;
  81 }
  82
  83 gint32
  84 Mono_Posix_Syscall_open (const char *pathname, gint32 flags)
  85 {
  86         if (Mono_Posix_FromOpenFlags (flags, &flags) == -1)
  87                 return -1;
  88
  89         return open (pathname, flags);
  90 }
  91
  92 gint32
  93 Mono_Posix_Syscall_open_mode (const char *pathname, gint32 flags, guint32 mode)
  94 {
  95         if (Mono_Posix_FromOpenFlags (flags, &flags) == -1)
  96                 return -1;
  97         if (Mono_Posix_FromFilePermissions (mode, &mode) == -1)
  98                 return -1;
  99
 100         return open (pathname, flags, mode);
 101 }
 102
 103 gint32
 104 Mono_Posix_Syscall_get_at_fdcwd ()
 105 {
 106 #ifdef AT_FDCWD
 107         return AT_FDCWD;
 108 #else
 109         return -1;
 110 #endif
 111 }
 112
 113 gint32
 114 Mono_Posix_Syscall_creat (const char *pathname, guint32 mode)
 115 {
 116         if (Mono_Posix_FromFilePermissions (mode, &mode) == -1)
 117                 return -1;
 118
 119         return creat (pathname, mode);
 120 }
 121
 122 #ifdef HAVE_POSIX_FADVISE
 123 gint32
 124 Mono_Posix_Syscall_posix_fadvise (gint32 fd, mph_off_t offset, mph_off_t len,
 125         gint32 advice)
 126 {
 127         mph_return_if_off_t_overflow (offset);
 128         mph_return_if_off_t_overflow (len);
 129
 130         if (Mono_Posix_FromPosixFadviseAdvice (advice, &advice) == -1)
 131                 return -1;
 132
 133         return posix_fadvise (fd, (off_t) offset, (off_t) len, advice);
 134 }
 135 #endif /* ndef HAVE_POSIX_FADVISE */
 136
 137 #ifdef HAVE_POSIX_FALLOCATE
 138 gint32
 139 Mono_Posix_Syscall_posix_fallocate (gint32 fd, mph_off_t offset, mph_size_t len)
 140 {
 141         mph_return_if_off_t_overflow (offset);
 142         mph_return_if_size_t_overflow (len);
 143
 144         return posix_fallocate (fd, (off_t) offset, (size_t) len);
 145 }
 146 #endif /* ndef HAVE_POSIX_FALLOCATE */
 147
 148 G_END_DECLS
 149
 150 /*
 151  * vim: noexpandtab
 152  */