/*
- * $Id: ad_open.c,v 1.56 2009-11-07 01:02:58 didg Exp $
+ * $Id: ad_open.c,v 1.61 2010-01-04 13:49:48 franklahm Exp $
*
* Copyright (c) 1999 Adrian Sun (asun@u.washington.edu)
* Copyright (c) 1990,1991 Regents of The University of Michigan.
* +1-313-763-0525
* netatalk@itd.umich.edu
*
- * NOTE: I don't use inline because a good compiler should be
- * able to optimize all the static below. Didier
+ */
+
+/*!
+ * @file
+ * Part of Netatalk's AppleDouble implementatation
+ * @note We don't use inlines because a good compiler should be
+ * able to optimize all the static funcs below.
+ * @sa include/atalk/adouble.h
*/
#ifdef HAVE_CONFIG_H
{
static char modebuf[ MAXPATHLEN + 1];
char *slash;
- size_t len;
-
- if ( (len = strlen( path )) >= MAXPATHLEN ) {
- errno = ENAMETOOLONG;
- return NULL; /* can't do it */
- }
-
/*
* For a path with directories in it, remove the final component
* (path or subdirectory name) to get the name we want to stat.
* For a path which is just a filename, use "." instead.
*/
- strcpy( modebuf, path );
- slash = strrchr( modebuf, '/' );
- /* is last char a '/' */
- if (slash && slash[1] == 0) {
- while (modebuf < slash && slash[-1] == '/') {
- --slash;
+ slash = strrchr( path, '/' );
+ if (slash) {
+ size_t len;
+
+ len = slash - path;
+ if (len >= MAXPATHLEN) {
+ errno = ENAMETOOLONG;
+ return NULL; /* can't do it */
}
- if (modebuf < slash) {
+ memcpy( modebuf, path, len );
+ modebuf[len] = '\0';
+ /* is last char a '/' ? */
+ if (slash[1] == 0) {
+ slash = modebuf+ len;
+ /* remove them */
+ while (modebuf < slash && slash[-1] == '/') {
+ --slash;
+ }
+ if (modebuf == slash) {
+ goto use_cur;
+ }
+ *slash = '\0';
+ while (modebuf < slash && *slash != '/') {
+ --slash;
+ }
+ if (modebuf == slash) {
+ goto use_cur;
+ }
*slash = '\0'; /* remove pathname component */
- slash = strrchr( modebuf, '/' );
}
+ return modebuf;
}
- if (slash) {
- *slash = '\0'; /* remove pathname component */
- } else {
- modebuf[0] = '.'; /* use current directory */
- modebuf[1] = '\0';
- }
+use_cur:
+ modebuf[0] = '.'; /* use current directory */
+ modebuf[1] = '\0';
return modebuf;
}
void ad_init(struct adouble *ad, int flags, int options)
{
- memset( ad, 0, sizeof( struct adouble ) );
+ ad->ad_inited = 0;
ad->ad_flags = flags;
if (flags == AD_VERSION2_OSX) {
ad->ad_ops = &ad_osx;
+ ad->ad_md = &ad->ad_resource_fork;
}
else if (flags == AD_VERSION1_SFM) {
ad->ad_ops = &ad_sfm;
+ ad->ad_md = &ad->ad_metadata_fork;
}
else {
ad->ad_ops = &ad_adouble;
+ ad->ad_md = &ad->ad_resource_fork;
}
ad->ad_options = options;
+
+ ad_data_fileno(ad) = -1;
+ ad_reso_fileno(ad) = -1;
+ ad_meta_fileno(ad) = -1;
+ /* following can be read even if there's no
+ * meda data.
+ */
+ memset(ad->ad_eid, 0, sizeof( ad->ad_eid ));
+ ad->ad_rlen = 0;
}
-/* -------------------
- * It's not possible to open the header file O_RDONLY -- the read
- * will fail and return an error. this refcounts things now.
+/*!
+ * Open data-, metadata(header)- or ressource fork
+ *
+ * You must call ad_init() before ad_open, usually you'll just call it like this: \n
+ * @code
+ * struct adoube ad;
+ * ad_init(&ad, vol->v_adouble, vol->v_ad_options);
+ * @endcode
+ *
+ * @param path Path to file or directory
+ *
+ * @param adflags ADFLAGS_DF: open data file/fork\n
+ * ADFLAGS_HF: open header (metadata) file\n
+ * ADFLAGS_RF: open ressource fork *** FIXME: not used ?! *** \n
+ * ADFLAGS_CREATE: indicate creation\n
+ * ADFLAGS_NOHF: it's not an error if header file couldn't be created\n
+ * ADFLAGS_DIR: if path is a directory you MUST or ADFLAGS_DIR to adflags\n
+ * ADFLAGS_NOADOUBLE: dont create adouble files if not necessary\n
+ * ADFLAGS_RDONLY: open read only\n
+ * ADFLAGS_OPENFORKS: check for open forks from other processes\n
+ * ADFLAGS_MD: alias for ADFLAGS_HF\n
+ * ADFLAGS_V1COMPAT: obsolete
+ *
+ * @param oflags flags passed through to open syscall: \n
+ * O_RDONLY: *** FIXME *** \n
+ * O_RDWR: *** FIXME *** \n
+ * O_CREAT: create fork\n
+ * O_EXCL: fail if exists with O_CREAT
+ *
+ * @param mode passed to open with O_CREAT
+ *
+ * @param ad pointer to struct adouble
+ *
+ * @returns 0 on success
+ *
+ * @note It's not possible to open the header file O_RDONLY -- the read
+ * will fail and return an error. this refcounts things now.
*/
int ad_open( const char *path, int adflags, int oflags, int mode, struct adouble *ad)
{
int open_df = 0;
if (ad->ad_inited != AD_INITED) {
- ad_data_fileno(ad) = -1;
- ad_reso_fileno(ad) = -1;
- adf_lock_init(&ad->ad_data_fork);
- adf_lock_init(&ad->ad_resource_fork);
- if (ad->ad_flags != AD_VERSION1_SFM) {
- ad->ad_md = &ad->ad_resource_fork;
- }
- else {
- adf_lock_init(&ad->ad_metadata_fork);
- ad->ad_md = &ad->ad_metadata_fork;
- ad_meta_fileno(ad) = -1;
- }
ad->ad_inited = AD_INITED;
ad->ad_refcount = 1;
ad->ad_open_forks = 0;
ad->ad_adflags = adflags;
+ ad->ad_resource_fork.adf_refcount = 0;
+ ad->ad_data_fork.adf_refcount = 0;
}
else {
ad->ad_open_forks = ((ad->ad_data_fork.adf_refcount > 0) ? ATTRBIT_DOPEN : 0);
/* just created, set owner if admin (root) */
ad_chown(path, &st_dir);
}
+ adf_lock_init(&ad->ad_data_fork);
}
else {
/* the file is already open... but */
goto sfm;
}
+ memset(ad->ad_eid, 0, sizeof( ad->ad_eid ));
+ ad->ad_rlen = 0;
ad_p = ad->ad_ops->ad_path( path, adflags );
hoflags = oflags & ~(O_CREAT | O_EXCL);
}
AD_SET(ad->ad_md->adf_off);
- memset(ad->ad_eid, 0, sizeof( ad->ad_eid ));
- ad->ad_md->adf_refcount++;
+ ad->ad_md->adf_refcount = 1;
+ adf_lock_init(ad->ad_md);
if ((ad->ad_md->adf_flags & ( O_TRUNC | O_CREAT ))) {
/*
* This is a new adouble header file. Initialize the structure,
ad_p = ad->ad_ops->ad_path( path, ADFLAGS_RF );
- hoflags = (oflags & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
- ad->ad_resource_fork.adf_fd = open( ad_p, hoflags, admode );
admode = mode;
st_invalid = ad_mode_st(ad_p, &admode, &st_dir);
admode = mode;
}
+ hoflags = (oflags & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
+ ad->ad_resource_fork.adf_fd = open( ad_p, hoflags, admode );
+
if (ad->ad_resource_fork.adf_fd < 0 ) {
if ((errno == EACCES || errno == EROFS) && !(oflags & O_RDWR)) {
hoflags = oflags;
errno = err;
return -1;
}
-
+ adf_lock_init(&ad->ad_resource_fork);
AD_SET(ad->ad_resource_fork.adf_off);
ad->ad_resource_fork.adf_flags = hoflags;
if ((oflags & O_CREAT) && !st_invalid) {
uid_t uid;
int ret, err;
int dir = flags & ADFLAGS_DIR;
-
+ int adouble = 0;
+
+ if (!(flags & ADFLAGS_NOADOUBLE)) {
+ adouble = O_CREAT;
+ }
+
/* Open with O_CREAT, thus enumarating a dir will create missing adouble files, see: */
/* http://marc.info/?l=netatalk-devel&m=124039156832408&w=2 */
- if ((ret = ad_open(name, ADFLAGS_HF | dir, O_RDWR | O_CREAT, 0666, adp)) < 0 && errno == EACCES) {
+ if ((ret = ad_open(name, ADFLAGS_HF | dir, O_RDWR | adouble, 0666, adp)) < 0 && errno == EACCES) {
uid = geteuid();
if (seteuid(0)) {
LOG(log_error, logtype_default, "ad_metadata(%s): seteuid failed %s", name, strerror(errno));