root/include/fiwix/limits.h

/* */

INCLUDED FROM

   1 /*
   2  * fiwix/include/fiwix/limits.h
   3  *
   4  * Copyright 2018, Jordi Sanfeliu. All rights reserved.
   5  * Distributed under the terms of the Fiwix License.
   6  */
   7 
   8 #ifndef _FIWIX_LIMITS_H
   9 #define _FIWIX_LIMITS_H
  10 
  11 #define DEVNAME_MAX     50      /* device name length in mount table */
  12 #define ARG_MAX         32      /* length (in pages) of argv+env in 'execve' */
  13 #define CHILD_MAX       64      /* simultaneous processes per real user ID */
  14 #define LINK_MAX        255     /* maximum number of links to a file */
  15 #define MAX_CANON       255     /* bytes in a terminal canonical input queue */
  16 #define MAX_INPUT       255     /* bytes for which space will be available in a
  17                                    terminal input queue */
  18 #define NGROUPS_MAX     32      /* simultaneous supplementary group IDs */
  19 #define OPEN_MAX        256     /* files one process can have opened at once */
  20 #define FD_SETSIZE      OPEN_MAX /* descriptors that a process may examine with
  21                                     'pselect' or 'select' */
  22 #define NAME_MAX        255     /* bytes in a filename */
  23 #define PATH_MAX        1024    /* bytes in a pathname */
  24 #define PIPE_BUF        4096    /* bytes than can be written atomically to a
  25                                    pipe */
  26 
  27 #endif /* _FIWIX_LIMITS_H */

/* */