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* $Id: common.c,v 1.3 2001/06/29 14:14:46 rufustfirefly Exp $
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common functions, defines, and structures for afile, achfile, and acleandir
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Copyright (C) 2001 Sebastian Rittau.
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This file may be distributed and/or modfied under the terms of the
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the author nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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#endif /* HAVE_CONFIG_H */
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#include <sys/types.h>
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#endif /* HAVE_FCNTL_H */
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#endif /* HAVE_UNISTD_H */
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#include <atalk/adouble.h>
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#include <netatalk/endian.h>
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#define AD_PREFIX ".AppleDouble/"
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#define PARENT_PREFIX "../"
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char *dataname_to_adname(const char *dataname)
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size_t adlen = strlen(AD_PREFIX);
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/* Construct the AppleDouble file name from data fork file name. */
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adname = calloc(adlen + strlen(dataname) + 1, sizeof(char));
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filepart = rindex(dataname, '/');
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if (filepart == NULL) {
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/* Filename doesn't contain a path. */
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strcpy(adname, AD_PREFIX);
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strcpy(adname + adlen, dataname);
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/* Filename does contain a path. */
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dirlen = (size_t) (filepart - dataname);
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strncpy(adname, dataname, dirlen + 1);
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strcpy(adname + dirlen + 1, AD_PREFIX);
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strcpy(adname + dirlen + adlen + 1, filepart + 1);
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char *adname_to_dataname(const char *adname)
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size_t plen = strlen(PARENT_PREFIX);
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/* Construct the data file name from the AppleDouble file name. */
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dataname = calloc(strlen(adname) + plen + 1, sizeof(char));
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filepart = rindex(adname, '/');
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if (filepart == NULL) {
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strcpy(dataname, PARENT_PREFIX);
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strcpy(dataname + plen, adname);
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dirlen = (size_t) (filepart - adname);
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strncpy(dataname, adname, dirlen + 1);
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strcpy(dataname + dirlen + 1, PARENT_PREFIX);
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strcpy(dataname + dirlen + plen + 1, filepart + 1);
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#define FLAG_NONE 0x0000
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#define FLAG_AD 0x0001
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#define FLAG_DIR 0x0002
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struct AFile *afile_new(const char *filename)
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char adbuf[AD_DATASZ];
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struct AFile *afile = (struct AFile *) calloc(sizeof(struct AFile), 1);
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afile->filename = filename;
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afile->fd = open(filename, O_RDONLY);
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afile->flags = FLAG_NONE;
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/* Try to open file. */
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if (afile->fd == -1) {
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fstat(afile->fd, &statbuf);
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afile->mode = statbuf.st_mode;
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/* Try to determine if this file is a regular file, a directory, or
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fstat(afile->fd, &fdstat);
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if (S_ISREG(fdstat.st_mode)) { /* it is a regular file */
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/* Check if the opened file is the resource fork. */
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sz = read(afile->fd, adbuf, AD_DATASZ);
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/* If we can't read a whole AppleDouble header, this can't be a valid
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if (sz == AD_DATASZ) {
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/* ... but as we could, maybe this is. Now if only the magic number
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* would be correct ...
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if (ntohl(((unsigned int *) adbuf)[0]) == AD_MAGIC)
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/* Great! It obviously is a AppleDouble file. */
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afile->flags |= FLAG_AD;
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afile->creator[0] = adbuf[ADEDOFF_FINDERI + 0];
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afile->creator[1] = adbuf[ADEDOFF_FINDERI + 1];
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afile->creator[2] = adbuf[ADEDOFF_FINDERI + 2];
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afile->creator[3] = adbuf[ADEDOFF_FINDERI + 3];
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afile->type [0] = adbuf[ADEDOFF_FINDERI + 4];
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afile->type [1] = adbuf[ADEDOFF_FINDERI + 5];
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afile->type [2] = adbuf[ADEDOFF_FINDERI + 6];
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afile->type [3] = adbuf[ADEDOFF_FINDERI + 7];
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} else if (S_ISDIR(fdstat.st_mode)) /* it is a directory */
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afile->flags |= FLAG_DIR;
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else { /* it is neither */
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void afile_delete(struct AFile *afile)
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const char *afile_filename(struct AFile *afile)
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return afile->filename;
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int afile_is_ad(struct AFile *afile)
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return afile->flags & FLAG_AD;
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int afile_is_dir(struct AFile *afile)
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return afile->flags & FLAG_DIR;
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mode_t afile_mode(struct AFile *afile)
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const char *afile_creator(const struct AFile *afile)
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return afile->creator;
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const char *afile_type(const struct AFile *afile)