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60 lines
1.9 KiB
60 lines
1.9 KiB
#ifndef _LIMITS_H
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#define _LIMITS_H
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#define RAND_MAX 0x7ffffffd /* don't ask - see rand.c */
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#define CHAR_BIT 8
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#define MB_LEN_MAX 1
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#define SCHAR_MIN (-128)
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#define SCHAR_MAX 127
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#define UCHAR_MAX 255U
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#ifdef __CHAR_UNSIGNED__
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#define CHAR_MIN 0
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#define CHAR_MAX UCHAR_MAX
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#else
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#define CHAR_MIN SCHAR_MIN
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#define CHAR_MAX SCHAR_MAX
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#endif
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#define SHRT_MIN (-32768)
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#define SHRT_MAX 32767
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#define USHRT_MAX 65535U
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#define INT_MIN (-2147483648)
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#define INT_MAX 2147483647
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#define UINT_MAX 4294967295U
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#define LONG_MIN (-2147483648)
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#define LONG_MAX 2147483647
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#define ULONG_MAX 4294967295U
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#define _POSIX_ARG_MAX 40960 /* exec() may have 40K worth of args */
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#define _POSIX_CHILD_MAX 6 /* a process may have 6 children */
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#define _POSIX_LINK_MAX 8 /* a file may have 8 links */
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#define _POSIX_MAX_CANON 255 /* size of the canonical input queue */
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#define _POSIX_MAX_INPUT 255 /* you can type 255 chars ahead */
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#define _POSIX_NAME_MAX 14 /* a file name may have 14 chars */
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#define _POSIX_NGROUPS_MAX 0 /* supplementary group IDs are optional */
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#define _POSIX_OPEN_MAX 16 /* a process may have 16 files open */
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#define _POSIX_PATH_MAX 255 /* a pathname may contain 255 chars */
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#define _POSIX_PIPE_BUF 512 /* pipes writes of 512 bytes must be atomic */
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#define NGROUPS_MAX 0 /* supplemental group IDs not available */
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#define ARG_MAX 40960 /* # bytes of args + environ for exec() */
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#define CHILD_MAX 999 /* no limit :-) */
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#define OPEN_MAX 20 /* # open files a process may have */
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#define LINK_MAX 127 /* # links a file may have */
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#define MAX_CANON 255 /* size of the canonical input queue */
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#define MAX_INPUT 255 /* size of the type-ahead buffer */
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#define NAME_MAX 14 /* # chars in a file name */
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#define PATH_MAX 1024 /* # chars in a path name */
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#define PIPE_BUF 4095 /* # bytes in atomic write to a pipe */
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#endif
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