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31 * @(#)syslimits.h 8.1 (Berkeley) 6/2/93
35 #ifndef _SYS_SYSLIMITS_H_
36 #define _SYS_SYSLIMITS_H_
38 #if !defined(_STANDALONE) && !defined(_KERNEL) && !defined(_LIMITS_H_) && !defined(_SYS_PARAM_H_)
40 #error this file needs sys/cdefs.h as a prerequisite
42 #ifdef __CC_SUPPORTS_WARNING
43 #warning "No user-serviceable parts inside."
48 * Do not add any new variables here. (See the comment at the end of
51 #define ARG_MAX 262144 /* max bytes for an exec function */
53 #define CHILD_MAX 40 /* max simultaneous processes */
55 #define MAX_CANON 255 /* max bytes in term canon input line */
56 #define MAX_INPUT 255 /* max bytes in terminal input */
57 #define NAME_MAX 255 /* max bytes in a file name */
59 #define NGROUPS_MAX 1023 /* max supplemental group id's */
62 #define OPEN_MAX 64 /* max open files per process */
64 #define PATH_MAX 1024 /* max bytes in pathname */
65 #define PIPE_BUF 512 /* max bytes for atomic pipe writes */
66 #define IOV_MAX 1024 /* max elements in i/o vector */
69 * We leave the following values undefined to force applications to either
70 * assume conservative values or call sysconf() to get the current value.
74 * (We should do this for most of the values currently defined here,
75 * but many programs are not prepared to deal with this yet.)