udev_lib.h

   1 /*
   2  * udev_lib - generic stuff used by udev
   3  *
   4  * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
   5  *
   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_LIB_H_
  23 #define _UDEV_LIB_H_
  24
  25
  26 #define strfieldcpy(to, from) \
  27 do { \
  28         to[sizeof(to)-1] = '\0'; \
  29         strncpy(to, from, sizeof(to)-1); \
  30 } while (0)
  31
  32 #define strfieldcat(to, from) \
  33 do { \
  34         to[sizeof(to)-1] = '\0'; \
  35         strncat(to, from, sizeof(to) - strlen(to)-1); \
  36 } while (0)
  37
  38 #define strfieldcpymax(to, from, maxsize) \
  39 do { \
  40         to[maxsize-1] = '\0'; \
  41         strncpy(to, from, maxsize-1); \
  42 } while (0)
  43
  44 #define strfieldcatmax(to, from, maxsize) \
  45 do { \
  46         to[maxsize-1] = '\0'; \
  47         strncat(to, from, maxsize - strlen(to)-1); \
  48 } while (0)
  49
  50 #define strintcat(to, i) \
  51 do { \
  52         to[sizeof(to)-1] = '\0'; \
  53         snprintf((to) + strlen(to), sizeof(to) - strlen(to)-1, "%u", i); \
  54 } while (0)
  55
  56 #define strintcatmax(to, i, maxsize) \
  57 do { \
  58         to[maxsize-1] = '\0'; \
  59         snprintf((to) + strlen(to), maxsize - strlen(to)-1, "%u", i); \
  60 } while (0)
  61
  62 #define foreach_strpart(str, separator, pos, len) \
  63         for(pos = str, len = 0; \
  64             (pos) < ((str) + strlen(str)); \
  65             pos = pos + len + strspn(pos, separator), len = strcspn(pos, separator)) \
  66                 if (len > 0)
  67
  68
  69 extern char *get_action(void);
  70 extern char *get_devpath(void);
  71 extern char *get_devname(void);
  72 extern char *get_seqnum(void);
  73 extern char *get_subsystem(char *subsystem);
  74 extern char get_device_type(const char *path, const char *subsystem);
  75 extern int file_map(const char *filename, char **buf, size_t *bufsize);
  76 extern void file_unmap(char *buf, size_t bufsize);
  77 extern size_t buf_get_line(char *buf, size_t buflen, size_t cur);
  78 extern void leading_slash(char *path);
  79 extern void no_leading_slash(char *path);
  80 extern int  call_foreach_file(int fnct(char *f) , char *filename, char *extension);
  81 extern int set_cloexec_flag (int desc, int value);
  82
  83 #endif