compiler/clib/include/sys/param.h

   1 #ifndef _SYS_PARAM_H_
   2 #define _SYS_PARAM_H_
   3 /*
   4     Copyright © 1995-2002, The AROS Development Team. All rights reserved.
   5     $Id$
   6
   7     sys/param.h header file.
   8
   9     Derived from FreeBSD since it is a BSD header, and SUSv2 doesn't
  10     mention it at all.
  11
  12     Many of these things are Unix kernel or just plain BSD specific, and as
  13     such have been left out.
  14 */
  15
  16 #include <sys/types.h>
  17
  18 /* Apparently we look a bit like a BSD system. */
  19 #define BSD     199506L
  20 #define BSD4_3  1
  21 #define BSD4_4  1
  22
  23 #define MAXCOMLEN       19          /* max command name remembered */
  24 #define MAXINTERP       32          /* max interpreter file name length */
  25 #define MAXLOGNAME      17          /* max login name length */
  26 #define NGROUPS         16          /* max number groups */
  27 #define NOFILE          64          /* max open files per process */
  28 #define MAXHOSTNAMELEN  256         /* max hostname size */
  29
  30 /* Others:
  31     MAXUPRC, NCARGS, NOGROUP, SPECNAMELEN
  32 */
  33
  34 /* From <sys/syslimits.h> */
  35 #define NAME_MAX        32          /* max bytes in a file name */
  36 #ifndef PATH_MAX
  37 #   define PATH_MAX     4095        /* max bytes in a pathname */
  38 #endif
  39 #define IOV_MAX         1024        /* max elements in i/o vector */
  40 #define LINE_MAX        2048        /* max bytes in an input line */
  41 #define MAXPATHLEN      PATH_MAX    /* max path after symlink deref */
  42 #define MAXSYMLINKS     32          /* max no of symlinks */
  43
  44 /* Others:
  45     ARG_MAX, CHILD_MAX, LINK_MAX, MAX_CANON, MAX_INPUT,
  46     PIPE_BUF, COLL_WEIGHTS_MAX, EXPR_NEST_MAX, RE_DUP_MAX
  47
  48     For bc(1):
  49         BC_BASE_MAX, BC_DIM_MAX, BC_SCALE_MAX, BC_STRING_MAX
  50 */
  51
  52 /* From <machine/param.h>:
  53
  54     Most of these have a problem in that we have no useful way of
  55     defining them. Although, since most of these are too Unix specific
  56     for most well behaved AROS software, I will leave them undefined until
  57     somebody really needs them.
  58
  59     MACHINE, MACHINE_ARCH, MAXCPU,
  60
  61     PAGE_SHIFT, PAGE_SIZE, PAGE_MASK, NPTEPG, NPDEPG, PDRSHIFT,
  62     NBPDR, PDRMASK,
  63
  64     DEV_BSHIFT, DEV_BSIZE,
  65
  66     BLKDEV_IOSIZE, DFLTPHYS, MAXPHYS, MAXDUMPPGS
  67
  68     IOPAGES, KSTACK_PAGES, UAREA_PAGES, KSTACK_GUARD
  69
  70     MBSIZE, MCLSHIFT, MCLBYTES
  71
  72     ctob(), btoc(), trunc_page(), round_page(), atop(), ptoa(),
  73     btop(), ptob(), pgtok()
  74 */
  75
  76 /* BSD typically includes <machine/limits.h> here, which is <limits.h> */
  77
  78 /* Back to <sys/param.h> */
  79 #define NBPW    sizeof (int)    /* number of bytes per word (integer) */
  80 #define CMASK   022             /* default file mask: S_IWGRP|S_OWOTH */
  81 #define NODEV   (dev_t)(-1)     /* non-existent device */
  82
  83 /* Others:
  84     PRIMASK, PCATCH, PDROP, NZERO, CBLOCK, CBQSIZE, CBSIZE, CROUND
  85     MAXBSIZE, BKVASIZE, BKVAMASK, MAXFRAG,
  86
  87     setbit(), clrbit(), isset(), isclr(),
  88     howmany(), rounddown(), roundup(), roundup2(), powerof2()
  89
  90     <sys/param.h> unconditionally defines MIN(), MAX().
  91 */
  92 #define MIN(a,b)    (((a)<(b))?(a):(b))
  93 #define MAX(a,b)    (((a)>(b))?(a):(b))
  94
  95 /* Others:
  96     MINBUCKET, MAXALLOCSAVE, FSHIFT, FSCALE, dbtoc(), ctodb()
  97 */
  98
  99 #endif /* _SYS_PARAM_H_ */