root/include/linux/limits.h

/* */

INCLUDED FROM

   1 #ifndef _LINUX_LIMITS_H
   2 #define _LINUX_LIMITS_H
   3 
   4 #define NAME_MAX 255
   5 
   6 /*
   7  * It's silly to have NR_OPEN bigger than NR_FILE, but I'll fix
   8  * that later. Anyway, now the file code is no longer dependent
   9  * on bitmaps in unsigned longs, but uses the new fd_set structure..
  10  *
  11  * Some programs (notably those using select()) may have to be 
  12  * recompiled to take full advantage of the new limits..
  13  */
  14 #define NR_OPEN 256
  15 #define NR_INODE 128
  16 #define NR_FILE 128
  17 #define NR_SUPER 16
  18 #define NR_HASH 997
  19 #define NR_FILE_LOCKS 32
  20 #define BLOCK_SIZE 1024
  21 #define BLOCK_SIZE_BITS 10
  22 #define MAX_CHRDEV 32
  23 #define MAX_BLKDEV 32
  24 
  25 #define NGROUPS_MAX       32    /* supplemental group IDs are available */
  26 #define ARG_MAX       131072    /* # bytes of args + environ for exec() */
  27 #define CHILD_MAX        999    /* no limit :-) */
  28 #define OPEN_MAX         256    /* # open files a process may have */
  29 #define LINK_MAX         127    /* # links a file may have */
  30 #define MAX_CANON        255    /* size of the canonical input queue */
  31 #define MAX_INPUT        255    /* size of the type-ahead buffer */
  32 #define NAME_MAX         255    /* # chars in a file name */
  33 #define PATH_MAX        1024    /* # chars in a path name */
  34 #define PIPE_BUF        4095    /* # bytes in atomic write to a pipe */
  35 
  36 #endif

/* */