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NAME
access - determine existence or accessibility of named file
SYNOPSIS
access(name [, mode])
TYPES
name string
mode integer or string containing only 'r', 'w', 'x' characters
return null value or error
DESCRIPTION
access(name) or access(name, 0) or access(name, "") returns the null
value if a file with this name exists.
If non-null mode is specified, the null value is returned if there
is a file with the specified name and accessibility indicated by the
bits or characters of the mode argument: 'r' or bit 2 for reading,
'w' or bit 1 for writing, 'x' or bit 0 for execution.
EXAMPLE
; ## The system error-numbers and messages may differ
; ## for different implementations
; !rm -f junk
; access("junk")
System error 2
; strerror(.)
"No such file or directory"
; f = fopen("junk", "w")
; access("junk")
; fputs(f, "Alpha")
; fclose(f)
; !chmod u-w junk
; access("junk", "w")
System error 13
; strerror(.)
"Permission denied"
LIMITS
There may be implementation-dependent limits inherited from the
system call "access" used by this function.
LINK LIBRARY
none
SEE ALSO
fopen, fclose, isfile, files
## Copyright (C) 1999,2021 Landon Curt Noll
##
## Calc is open software; you can redistribute it and/or modify it under
## the terms of the version 2.1 of the GNU Lesser General Public License
## as published by the Free Software Foundation.
##
## Calc is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
## Public License for more details.
##
## A copy of version 2.1 of the GNU Lesser General Public License is
## distributed with calc under the filename COPYING-LGPL. You should have
## received a copy with calc; if not, write to Free Software Foundation, Inc.
## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
##
## Under source code control: 1996/04/30 03:36:20
## File existed as early as: 1996
##
## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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