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64 lines
2.1 KiB
Plaintext
64 lines
2.1 KiB
Plaintext
NAME
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freopen - close (if necessary) and reopen a file stream
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SYNOPSIS
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freopen(fs, mode [,filename])
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TYPES
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fs open or closed file stream
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mode one of the strings "r", "w", "a", "r+", "w+, "a+"
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filename string
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return null or error value
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DESCRIPTION
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With two arguments, this function closes the file stream fs and
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attempts to reopen it with the specified mode. A non-null value
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is returned only if the attempt fails.
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With three arguments, fs, if open, is closed, and an attempt is made to
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open the file with the specified name and assign it to the stream
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fs. A non-null value is returned only if the attempt fails.
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EXAMPLE
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; f = fopen("/tmp/junk", "w")
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; fputs(f, "Leonard Euler")
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; freopen(f, "r")
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; fgets(f)
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"Leonard Euler"
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; !chmod u-w /tmp/junk
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; freopen(f, "w")
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Error E_FRAC
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LIMITS
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none
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LINK LIBRARY
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none
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SEE ALSO
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errno, fclose, feof, ferror, fflush, fgetc, fgetline, fgets, files, fopen,
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fprintf, fputc, fputs, fseek, fsize, ftell, isfile, printf, prompt
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## Copyright (C) 1999-2006,2021,2023 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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## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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##
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## Under source code control: 1996/04/30 03:05:18
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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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