udev_libc_wrapper.h

   1 /*
   2  * udev_libc_wrapper - wrapping of functions missing in a specific libc
   3  *                     or not working in a statically compiled binary
   4  *
   5  * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
   6  *
   7  *      This program is free software; you can redistribute it and/or modify it
   8  *      under the terms of the GNU General Public License as published by the
   9  *      Free Software Foundation version 2 of the License.
  10  *
  11  *      This program is distributed in the hope that it will be useful, but
  12  *      WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  *      General Public License for more details.
  15  *
  16  *      You should have received a copy of the GNU General Public License along
  17  *      with this program; if not, write to the Free Software Foundation, Inc.,
  18  *      675 Mass Ave, Cambridge, MA 02139, USA.
  19  *
  20  */
  21
  22 #ifndef _UDEV_LIBC_WRAPPER_H_
  23 #define _UDEV_LIBC_WRAPPER_H_
  24
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <stdint.h>
  28
  29 /* needed until Inotify! syscalls reach glibc */
  30 #include <sys/syscall.h>
  31 #ifndef __NR_inotify_init
  32 #if defined(__i386__)
  33 # define __NR_inotify_init      291
  34 # define __NR_inotify_add_watch 292
  35 # define __NR_inotify_rm_watch  293
  36 #elif defined(__x86_64__)
  37 # define __NR_inotify_init      253
  38 # define __NR_inotify_add_watch 254
  39 # define __NR_inotify_rm_watch  255
  40 #elif defined(__powerpc__) || defined(__powerpc64__)
  41 # define __NR_inotify_init      275
  42 # define __NR_inotify_add_watch 276
  43 # define __NR_inotify_rm_watch  277
  44 #elif defined (__ia64__)
  45 # define __NR_inotify_init      1277
  46 # define __NR_inotify_add_watch 1278
  47 # define __NR_inotify_rm_watch  1279
  48 #elif defined (__s390__)
  49 # define __NR_inotify_init      284
  50 # define __NR_inotify_add_watch 285
  51 # define __NR_inotify_rm_watch  286
  52 #elif defined (__alpha__)
  53 # define __NR_inotify_init      444
  54 # define __NR_inotify_add_watch 445
  55 # define __NR_inotify_rm_watch  446
  56 #elif defined (__sparc__) || defined (__sparc64__)
  57 # define __NR_inotify_init      151
  58 # define __NR_inotify_add_watch 152
  59 # define __NR_inotify_rm_watch  156
  60 #elif defined (__arm__)
  61 # define __NR_inotify_init      316
  62 # define __NR_inotify_add_watch 317
  63 # define __NR_inotify_rm_watch  318
  64 #elif defined (__sh__)
  65 # define __NR_inotify_init      290
  66 # define __NR_inotify_add_watch 291
  67 # define __NR_inotify_rm_watch  292
  68 #else
  69 #warning "inotify unsupported on this architecture!"
  70 #endif
  71 #endif /* __NR_inotify_init */
  72
  73 /* dummy if we don't have the syscalls defined */
  74 #ifndef __NR_inotify_init
  75 static inline int inotify_init(void)
  76 {
  77         return -1;
  78 }
  79
  80 static inline int inotify_add_watch(int fd, const char *name, uint32_t mask)
  81 {
  82         return -1;
  83 }
  84 #else
  85 /* needed until /usr/include/sys/inotify.h is working */
  86 #ifdef __KLIBC__
  87 #include <sys/inotify.h>
  88 #else
  89 static inline int inotify_init(void)
  90 {
  91         return syscall(__NR_inotify_init);
  92 }
  93
  94 static inline int inotify_add_watch(int fd, const char *name, uint32_t mask)
  95 {
  96         return syscall(__NR_inotify_add_watch, fd, name, mask);
  97 }
  98 #endif /* __KLIBC__ */
  99 #endif /* __NR_inotify_init */
 100
 101 #ifndef IN_CREATE
 102 #define IN_CREATE               0x00000100      /* Subfile was created */
 103 #define IN_MOVED_FROM           0x00000040      /* File was moved from X */
 104 #define IN_MOVED_TO             0x00000080      /* File was moved to Y */
 105 #define IN_DELETE               0x00000200      /* Subfile was deleted */
 106 #define IN_CLOSE_WRITE          0x00000008      /* Writtable file was closed */
 107 #define IN_MOVE                 (IN_MOVED_FROM | IN_MOVED_TO) /* moves */
 108 #endif /* IN_CREATE */
 109
 110 /* needed for our signal handlers to work */
 111 #undef asmlinkage
 112 #ifdef __i386__
 113 #define asmlinkage      __attribute__((regparm(0)))
 114 #else
 115 #define asmlinkage
 116 #endif /* __i386__ */
 117
 118 /* headers are broken on some lazy platforms */
 119 #ifndef __FD_SET
 120 #define __FD_SET(d, set) ((set)->fds_bits[__FDELT(d)] |= __FDMASK(d))
 121 #endif
 122 #ifndef __FD_CLR
 123 #define __FD_CLR(d, set) ((set)->fds_bits[__FDELT(d)] &= ~__FDMASK(d))
 124 #endif
 125 #ifndef __FD_ISSET
 126 #define __FD_ISSET(d, set) (((set)->fds_bits[__FDELT(d)] & __FDMASK(d)) != 0)
 127 #endif
 128 #ifndef __FD_ZERO
 129 #define __FD_ZERO(set) ((void) memset ((void*) (set), 0, sizeof (fd_set)))
 130 #endif
 131
 132 /* missing in some lazy distros */
 133 #ifndef NETLINK_KOBJECT_UEVENT
 134 #define NETLINK_KOBJECT_UEVENT 15
 135 #endif
 136
 137 #ifndef SO_RCVBUFFORCE
 138 #define SO_RCVBUFFORCE 33
 139 #endif
 140
 141 #ifdef __KLIBC__
 142 static inline int clearenv(void)
 143 {
 144         environ[0] = NULL;
 145         return 0;
 146 }
 147 #endif
 148
 149 extern uid_t lookup_user(const char *user);
 150 extern gid_t lookup_group(const char *group);
 151
 152 extern size_t strlcpy(char *dst, const char *src, size_t size);
 153 extern size_t strlcat(char *dst, const char *src, size_t size);
 154
 155 #endif /* _UDEV_LIBC_WRAPPER_H_ */