56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2014, 2015.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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dirent/readdir.c
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Reads a directory entry from a directory stream into a DIR-specific buffer.
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*******************************************************************************/
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#include <sys/readdirents.h>
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#include <dirent.h>
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#include <errno.h>
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#include <stdlib.h>
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struct dirent* readdir(DIR* dir)
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{
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int old_errno = errno;
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struct dirent fallback;
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struct dirent* entry = dir->entry ? dir->entry : &fallback;
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size_t size = dir->entry ? dir->size : sizeof(fallback);
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ssize_t amount;
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while ( (amount = readdirents(dir->fd, entry, size)) < 0 )
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{
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if ( errno != ERANGE )
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return NULL;
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errno = old_errno;
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size_t needed = entry->d_reclen;
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free(dir->entry);
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dir->entry = NULL;
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struct dirent* new_dirent = (struct dirent*) malloc(needed);
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if ( !new_dirent )
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return NULL;
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entry = dir->entry = new_dirent;
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size = dir->size = needed;
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}
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if ( amount == 0 )
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return NULL;
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return dir->entry;
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}
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