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fa185f0d45
The new type struct fd_to_filename makes the allocation of the backing storage explicit. Hurd uses /dev/fd, not /proc/self/fd. Co-Authored-By: Paul Eggert <eggert@cs.ucla.edu>
39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
/* Construct a pathname under /proc/self/fd (or /dev/fd for Hurd).
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Copyright (C) 2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <fd_to_filename.h>
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#include <assert.h>
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#include <string.h>
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char *
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__fd_to_filename (int descriptor, struct fd_to_filename *storage)
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{
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assert (descriptor >= 0);
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char *p = mempcpy (storage->buffer, FD_TO_FILENAME_PREFIX,
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strlen (FD_TO_FILENAME_PREFIX));
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for (int d = descriptor; p++, (d /= 10) != 0; )
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continue;
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*p = '\0';
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for (int d = descriptor; *--p = '0' + d % 10, (d /= 10) != 0; )
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continue;
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return storage->buffer;
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}
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