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76 lines
2.3 KiB
Plaintext
76 lines
2.3 KiB
Plaintext
NAME
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access - determine existence or accessibility of named file
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SYNOPSIS
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access(name [, mode])
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TYPES
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name string
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mode integer or string containing only 'r', 'w', 'x' characters
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return null value or error
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DESCRIPTION
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access(name) or access(name, 0) or access(name, "") returns the null
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value if a file with this name exists.
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If non-null mode is specified, the null value is returned if there
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is a file with the specified name and accessibility indicated by the
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bits or characters of the mode argument: 'r' or bit 2 for reading,
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'w' or bit 1 for writing, 'x' or bit 0 for execution.
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EXAMPLE
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The system error-numbers and messages may differ for different
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implementations
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; !rm -f junk
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; access("junk")
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System error 2
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; strerror(.)
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"No such file or directory"
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; f = fopen("junk", "w")
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; access("junk")
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; fputs(f, "Alpha")
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; fclose(f)
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; !chmod u-w junk
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; access("junk", "w")
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System error 13
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; strerror(.)
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"Permission denied"
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LIMITS
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There may be implementation-dependent limits inherited from the
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system call "access" used by this function.
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LINK LIBRARY
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none
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SEE ALSO
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fopen, fclose, isfile, files
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## Copyright (C) 1999 Landon Curt Noll
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##
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## Calc is open software; you can redistribute it and/or modify it under
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## the terms of the version 2.1 of the GNU Lesser General Public License
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## as published by the Free Software Foundation.
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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## distributed with calc under the filename COPYING-LGPL. You should have
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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##
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## @(#) $Revision: 29.3 $
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## @(#) $Id: access,v 29.3 2006/05/07 07:25:46 chongo Exp $
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## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/access,v $
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##
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## Under source code control: 1996/04/30 03:36:20
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## File existed as early as: 1996
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##
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## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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