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Here are the names for the POSIX minimum upper bounds for some of the above parameters. The significance of these values is that you can safely push to these limits without checking whether the particular system you are using can go that far. In most cases GNU systems do not have these strict limitations. The actual limit should be requested if necessary.
_POSIX_LINK_MAX
8
; thus, you
can always make up to eight names for a file without running into a
system limit.
_POSIX_MAX_CANON
255
.
_POSIX_MAX_INPUT
255
.
_POSIX_NAME_MAX
14
.
_POSIX_PATH_MAX
256
.
_POSIX_PIPE_BUF
512
.
SYMLINK_MAX
POSIX_REC_INCR_XFER_SIZE
POSIX_REC_MIN_XFER_SIZE
and POSIX_REC_MAX_XFER_SIZE
values.
POSIX_REC_MAX_XFER_SIZE
POSIX_REC_MIN_XFER_SIZE
POSIX_REC_XFER_ALIGN