shared/missing.h

   1 #pragma once
   2
   3 #include <unistd.h>
   4 #include <sys/syscall.h>
   5
   6 #ifdef HAVE_LINUX_MODULE_H
   7 #include <linux/module.h>
   8 #endif
   9
  10 #ifndef MODULE_INIT_IGNORE_MODVERSIONS
  11 # define MODULE_INIT_IGNORE_MODVERSIONS 1
  12 #endif
  13
  14 #ifndef MODULE_INIT_IGNORE_VERMAGIC
  15 # define MODULE_INIT_IGNORE_VERMAGIC 2
  16 #endif
  17
  18 #ifndef __NR_finit_module
  19 # define __NR_finit_module -1
  20 #endif
  21
  22 #ifndef HAVE_FINIT_MODULE
  23 #include <errno.h>
  24
  25 static inline int finit_module(int fd, const char *uargs, int flags)
  26 {
  27         if (__NR_finit_module == -1) {
  28                 errno = ENOSYS;
  29                 return -1;
  30         }
  31
  32         return syscall(__NR_finit_module, fd, uargs, flags);
  33 }
  34 #endif
  35
  36 #if !HAVE_DECL_STRNDUPA
  37 #define strndupa(s, n)                                                  \
  38         ({                                                              \
  39                 const char *__old = (s);                                \
  40                 size_t __len = strnlen(__old, (n));                     \
  41                 char *__new = alloca(__len + 1);                        \
  42                 __new[__len] = '\0';                                    \
  43                 memcpy(__new, __old, __len);                            \
  44          })
  45 #endif
  46
  47 #if !HAVE_DECL_BE32TOH
  48 #include <endian.h>
  49 #include <byteswap.h>
  50 #if __BYTE_ORDER == __LITTLE_ENDIAN
  51 #define be32toh(x) bswap_32 (x)
  52 #else
  53 #define be32toh(x) (x)
  54 #endif
  55 #endif