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-rw-r--r--lib/replace/xattr.c852
1 files changed, 852 insertions, 0 deletions
diff --git a/lib/replace/xattr.c b/lib/replace/xattr.c
new file mode 100644
index 0000000..1044942
--- /dev/null
+++ b/lib/replace/xattr.c
@@ -0,0 +1,852 @@
+/*
+ Unix SMB/CIFS implementation.
+ replacement routines for xattr implementations
+ Copyright (C) Jeremy Allison 1998-2005
+ Copyright (C) Timur Bakeyev 2005
+ Copyright (C) Bjoern Jacke 2006-2007
+ Copyright (C) Herb Lewis 2003
+ Copyright (C) Andrew Bartlett 2012
+
+ ** NOTE! The following LGPL license applies to the replace
+ ** library. This does NOT imply that all of Samba is released
+ ** under the LGPL
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 3 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#define UID_WRAPPER_NOT_REPLACE
+#include "replace.h"
+#include "system/filesys.h"
+#include "system/dir.h"
+
+/******** Solaris EA helper function prototypes ********/
+#ifdef HAVE_ATTROPEN
+#define SOLARIS_ATTRMODE S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP
+static int solaris_write_xattr(int attrfd, const char *value, size_t size);
+static ssize_t solaris_read_xattr(int attrfd, void *value, size_t size);
+static ssize_t solaris_list_xattr(int attrdirfd, char *list, size_t size);
+static int solaris_unlinkat(int attrdirfd, const char *name);
+static int solaris_attropen(const char *path, const char *attrpath, int oflag, mode_t mode);
+static int solaris_openat(int fildes, const char *path, int oflag, mode_t mode);
+#endif
+
+/**************************************************************************
+ Wrappers for extented attribute calls. Based on the Linux package with
+ support for IRIX and (Net|Free)BSD also. Expand as other systems have them.
+****************************************************************************/
+
+ssize_t rep_getxattr (const char *path, const char *name, void *value, size_t size)
+{
+#if defined(HAVE_XATTR_XATTR)
+#ifndef XATTR_ADDITIONAL_OPTIONS
+ return getxattr(path, name, value, size);
+#else
+
+/* So that we do not recursively call this function */
+#undef getxattr
+ int options = 0;
+ return getxattr(path, name, value, size, 0, options);
+#endif
+#elif defined(HAVE_XATTR_EA)
+ return getea(path, name, value, size);
+#elif defined(HAVE_XATTR_EXTATTR)
+ ssize_t retval;
+ int attrnamespace;
+ const char *attrname;
+
+ if (strncmp(name, "system.", 7) == 0) {
+ attrnamespace = EXTATTR_NAMESPACE_SYSTEM;
+ attrname = name + 7;
+ } else if (strncmp(name, "user.", 5) == 0) {
+ attrnamespace = EXTATTR_NAMESPACE_USER;
+ attrname = name + 5;
+ } else {
+ errno = EINVAL;
+ return -1;
+ }
+
+ /*
+ * The BSD implementation has a nasty habit of silently truncating
+ * the returned value to the size of the buffer, so we have to check
+ * that the buffer is large enough to fit the returned value.
+ */
+ if((retval=extattr_get_file(path, attrnamespace, attrname, NULL, 0)) >= 0) {
+ if (size == 0) {
+ return retval;
+ } else if (retval > size) {
+ errno = ERANGE;
+ return -1;
+ }
+ if((retval=extattr_get_file(path, attrnamespace, attrname, value, size)) >= 0)
+ return retval;
+ }
+
+ return -1;
+#elif defined(HAVE_XATTR_ATTR)
+ int retval, flags = 0;
+ int valuelength = (int)size;
+ char *attrname = strchr(name,'.') + 1;
+
+ if (strncmp(name, "system", 6) == 0) flags |= ATTR_ROOT;
+
+ retval = attr_get(path, attrname, (char *)value, &valuelength, flags);
+ if (size == 0 && retval == -1 && errno == E2BIG) {
+ return valuelength;
+ }
+
+ return retval ? retval : valuelength;
+#elif defined(HAVE_ATTROPEN)
+ ssize_t ret = -1;
+ int attrfd = solaris_attropen(path, name, O_RDONLY, 0);
+ if (attrfd >= 0) {
+ ret = solaris_read_xattr(attrfd, value, size);
+ close(attrfd);
+ }
+ return ret;
+#else
+ errno = ENOSYS;
+ return -1;
+#endif
+}
+
+ssize_t rep_fgetxattr (int filedes, const char *name, void *value, size_t size)
+{
+#if defined(HAVE_XATTR_XATTR)
+#ifndef XATTR_ADDITIONAL_OPTIONS
+ return fgetxattr(filedes, name, value, size);
+#else
+
+/* So that we do not recursively call this function */
+#undef fgetxattr
+ int options = 0;
+ return fgetxattr(filedes, name, value, size, 0, options);
+#endif
+#elif defined(HAVE_XATTR_EA)
+ return fgetea(filedes, name, value, size);
+#elif defined(HAVE_XATTR_EXTATTR)
+ ssize_t retval;
+ int attrnamespace;
+ const char *attrname;
+
+ if (strncmp(name, "system.", 7) == 0) {
+ attrnamespace = EXTATTR_NAMESPACE_SYSTEM;
+ attrname = name + 7;
+ } else if (strncmp(name, "user.", 5) == 0) {
+ attrnamespace = EXTATTR_NAMESPACE_USER;
+ attrname = name + 5;
+ } else {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if((retval=extattr_get_fd(filedes, attrnamespace, attrname, NULL, 0)) >= 0) {
+ if (size == 0) {
+ return retval;
+ } else if (retval > size) {
+ errno = ERANGE;
+ return -1;
+ }
+ if((retval=extattr_get_fd(filedes, attrnamespace, attrname, value, size)) >= 0)
+ return retval;
+ }
+
+ return -1;
+#elif defined(HAVE_XATTR_ATTR)
+ int retval, flags = 0;
+ int valuelength = (int)size;
+ char *attrname = strchr(name,'.') + 1;
+
+ if (strncmp(name, "system", 6) == 0) flags |= ATTR_ROOT;
+
+ retval = attr_getf(filedes, attrname, (char *)value, &valuelength, flags);
+ if (size == 0 && retval == -1 && errno == E2BIG) {
+ return valuelength;
+ }
+ return retval ? retval : valuelength;
+#elif defined(HAVE_ATTROPEN)
+ ssize_t ret = -1;
+ int attrfd = solaris_openat(filedes, name, O_RDONLY|O_XATTR, 0);
+ if (attrfd >= 0) {
+ ret = solaris_read_xattr(attrfd, value, size);
+ close(attrfd);
+ }
+ return ret;
+#else
+ errno = ENOSYS;
+ return -1;
+#endif
+}
+
+#if defined(HAVE_XATTR_EXTATTR)
+
+#define EXTATTR_PREFIX(s) (s), (sizeof((s))-1)
+
+static struct {
+ int space;
+ const char *name;
+ size_t len;
+}
+extattr[] = {
+ { EXTATTR_NAMESPACE_SYSTEM, EXTATTR_PREFIX("system.") },
+ { EXTATTR_NAMESPACE_USER, EXTATTR_PREFIX("user.") },
+};
+
+typedef union {
+ const char *path;
+ int filedes;
+} extattr_arg;
+
+static ssize_t bsd_attr_list (int type, extattr_arg arg, char *list, size_t size)
+{
+ ssize_t list_size, total_size = 0;
+ int i, len;
+ size_t t;
+ char *buf;
+ /* Iterate through extattr(2) namespaces */
+ for(t = 0; t < ARRAY_SIZE(extattr); t++) {
+ if (t != EXTATTR_NAMESPACE_USER && geteuid() != 0) {
+ /* ignore all but user namespace when we are not root, see bug 10247 */
+ continue;
+ }
+ switch(type) {
+ case 0:
+ list_size = extattr_list_file(arg.path, extattr[t].space, list, size);
+ break;
+ case 1:
+ list_size = extattr_list_link(arg.path, extattr[t].space, list, size);
+ break;
+ case 2:
+ list_size = extattr_list_fd(arg.filedes, extattr[t].space, list, size);
+ break;
+ default:
+ errno = ENOSYS;
+ return -1;
+ }
+ /* Some error happend. Errno should be set by the previous call */
+ if(list_size < 0)
+ return -1;
+ /* No attributes */
+ if(list_size == 0)
+ continue;
+ /* XXX: Call with an empty buffer may be used to calculate
+ necessary buffer size. Unfortunately, we can't say, how
+ many attributes were returned, so here is the potential
+ problem with the emulation.
+ */
+ if(list == NULL) {
+ /* Take the worse case of one char attribute names -
+ two bytes per name plus one more for sanity.
+ */
+ total_size += list_size + (list_size/2 + 1)*extattr[t].len;
+ continue;
+ }
+ /* Count necessary offset to fit namespace prefixes */
+ len = 0;
+ for(i = 0; i < list_size; i += list[i] + 1)
+ len += extattr[t].len;
+
+ total_size += list_size + len;
+ /* Buffer is too small to fit the results */
+ if(total_size > size) {
+ errno = ERANGE;
+ return -1;
+ }
+ /* Shift results back, so we can prepend prefixes */
+ buf = (char *)memmove(list + len, list, list_size);
+
+ for(i = 0; i < list_size; i += len + 1) {
+ len = buf[i];
+
+ /*
+ * If for some reason we receive a truncated
+ * return from call to list xattrs the pascal
+ * string lengths will not be changed and
+ * therefore we must check that we're not
+ * reading garbage data or off end of array
+ */
+ if (len + i >= list_size) {
+ errno = ERANGE;
+ return -1;
+ }
+ strncpy(list, extattr[t].name, extattr[t].len + 1);
+ list += extattr[t].len;
+ strncpy(list, buf + i + 1, len);
+ list[len] = '\0';
+ list += len + 1;
+ }
+ size -= total_size;
+ }
+ return total_size;
+}
+
+#endif
+
+#if defined(HAVE_XATTR_ATTR) && (defined(HAVE_SYS_ATTRIBUTES_H) || defined(HAVE_ATTR_ATTRIBUTES_H))
+static char attr_buffer[ATTR_MAX_VALUELEN];
+
+static ssize_t irix_attr_list(const char *path, int filedes, char *list, size_t size, int flags)
+{
+ int retval = 0, index;
+ attrlist_cursor_t *cursor = 0;
+ int total_size = 0;
+ attrlist_t * al = (attrlist_t *)attr_buffer;
+ attrlist_ent_t *ae;
+ size_t ent_size, left = size;
+ char *bp = list;
+
+ while (true) {
+ if (filedes)
+ retval = attr_listf(filedes, attr_buffer, ATTR_MAX_VALUELEN, flags, cursor);
+ else
+ retval = attr_list(path, attr_buffer, ATTR_MAX_VALUELEN, flags, cursor);
+ if (retval) break;
+ for (index = 0; index < al->al_count; index++) {
+ ae = ATTR_ENTRY(attr_buffer, index);
+ ent_size = strlen(ae->a_name) + sizeof("user.");
+ if (left >= ent_size) {
+ strncpy(bp, "user.", sizeof("user."));
+ strncat(bp, ae->a_name, ent_size - sizeof("user."));
+ bp += ent_size;
+ left -= ent_size;
+ } else if (size) {
+ errno = ERANGE;
+ retval = -1;
+ break;
+ }
+ total_size += ent_size;
+ }
+ if (al->al_more == 0) break;
+ }
+ if (retval == 0) {
+ flags |= ATTR_ROOT;
+ cursor = 0;
+ while (true) {
+ if (filedes)
+ retval = attr_listf(filedes, attr_buffer, ATTR_MAX_VALUELEN, flags, cursor);
+ else
+ retval = attr_list(path, attr_buffer, ATTR_MAX_VALUELEN, flags, cursor);
+ if (retval) break;
+ for (index = 0; index < al->al_count; index++) {
+ ae = ATTR_ENTRY(attr_buffer, index);
+ ent_size = strlen(ae->a_name) + sizeof("system.");
+ if (left >= ent_size) {
+ strncpy(bp, "system.", sizeof("system."));
+ strncat(bp, ae->a_name, ent_size - sizeof("system."));
+ bp += ent_size;
+ left -= ent_size;
+ } else if (size) {
+ errno = ERANGE;
+ retval = -1;
+ break;
+ }
+ total_size += ent_size;
+ }
+ if (al->al_more == 0) break;
+ }
+ }
+ return (ssize_t)(retval ? retval : total_size);
+}
+
+#endif
+
+ssize_t rep_listxattr (const char *path, char *list, size_t size)
+{
+#if defined(HAVE_XATTR_XATTR)
+#ifndef XATTR_ADDITIONAL_OPTIONS
+ return listxattr(path, list, size);
+#else
+/* So that we do not recursively call this function */
+#undef listxattr
+ int options = 0;
+ return listxattr(path, list, size, options);
+#endif
+#elif defined(HAVE_XATTR_EA)
+ return listea(path, list, size);
+#elif defined(HAVE_XATTR_EXTATTR)
+ extattr_arg arg;
+ arg.path = path;
+ return bsd_attr_list(0, arg, list, size);
+#elif defined(HAVE_XATTR_ATTR) && defined(HAVE_SYS_ATTRIBUTES_H)
+ return irix_attr_list(path, 0, list, size, 0);
+#elif defined(HAVE_ATTROPEN)
+ ssize_t ret = -1;
+ int attrdirfd = solaris_attropen(path, ".", O_RDONLY, 0);
+ if (attrdirfd >= 0) {
+ ret = solaris_list_xattr(attrdirfd, list, size);
+ close(attrdirfd);
+ }
+ return ret;
+#else
+ errno = ENOSYS;
+ return -1;
+#endif
+}
+
+ssize_t rep_flistxattr (int filedes, char *list, size_t size)
+{
+#if defined(HAVE_XATTR_XATTR)
+#ifndef XATTR_ADDITIONAL_OPTIONS
+ return flistxattr(filedes, list, size);
+#else
+/* So that we do not recursively call this function */
+#undef flistxattr
+ int options = 0;
+ return flistxattr(filedes, list, size, options);
+#endif
+#elif defined(HAVE_XATTR_EA)
+ return flistea(filedes, list, size);
+#elif defined(HAVE_XATTR_EXTATTR)
+ extattr_arg arg;
+ arg.filedes = filedes;
+ return bsd_attr_list(2, arg, list, size);
+#elif defined(HAVE_XATTR_ATTR)
+ return irix_attr_list(NULL, filedes, list, size, 0);
+#elif defined(HAVE_ATTROPEN)
+ ssize_t ret = -1;
+ int attrdirfd = solaris_openat(filedes, ".", O_RDONLY|O_XATTR, 0);
+ if (attrdirfd >= 0) {
+ ret = solaris_list_xattr(attrdirfd, list, size);
+ close(attrdirfd);
+ }
+ return ret;
+#else
+ errno = ENOSYS;
+ return -1;
+#endif
+}
+
+int rep_removexattr (const char *path, const char *name)
+{
+#if defined(HAVE_XATTR_XATTR)
+#ifndef XATTR_ADDITIONAL_OPTIONS
+ return removexattr(path, name);
+#else
+/* So that we do not recursively call this function */
+#undef removexattr
+ int options = 0;
+ return removexattr(path, name, options);
+#endif
+#elif defined(HAVE_XATTR_EA)
+ return removeea(path, name);
+#elif defined(HAVE_XATTR_EXTATTR)
+ int attrnamespace;
+ const char *attrname;
+
+ if (strncmp(name, "system.", 7) == 0) {
+ attrnamespace = EXTATTR_NAMESPACE_SYSTEM;
+ attrname = name + 7;
+ } else if (strncmp(name, "user.", 5) == 0) {
+ attrnamespace = EXTATTR_NAMESPACE_USER;
+ attrname = name + 5;
+ } else {
+ errno = EINVAL;
+ return -1;
+ }
+
+ return extattr_delete_file(path, attrnamespace, attrname);
+#elif defined(HAVE_XATTR_ATTR)
+ int flags = 0;
+ char *attrname = strchr(name,'.') + 1;
+
+ if (strncmp(name, "system", 6) == 0) flags |= ATTR_ROOT;
+
+ return attr_remove(path, attrname, flags);
+#elif defined(HAVE_ATTROPEN)
+ int ret = -1;
+ int attrdirfd = solaris_attropen(path, ".", O_RDONLY, 0);
+ if (attrdirfd >= 0) {
+ ret = solaris_unlinkat(attrdirfd, name);
+ close(attrdirfd);
+ }
+ return ret;
+#else
+ errno = ENOSYS;
+ return -1;
+#endif
+}
+
+int rep_fremovexattr (int filedes, const char *name)
+{
+#if defined(HAVE_XATTR_XATTR)
+#ifndef XATTR_ADDITIONAL_OPTIONS
+ return fremovexattr(filedes, name);
+#else
+/* So that we do not recursively call this function */
+#undef fremovexattr
+ int options = 0;
+ return fremovexattr(filedes, name, options);
+#endif
+#elif defined(HAVE_XATTR_EA)
+ return fremoveea(filedes, name);
+#elif defined(HAVE_XATTR_EXTATTR)
+ int attrnamespace;
+ const char *attrname;
+
+ if (strncmp(name, "system.", 7) == 0) {
+ attrnamespace = EXTATTR_NAMESPACE_SYSTEM;
+ attrname = name + 7;
+ } else if (strncmp(name, "user.", 5) == 0) {
+ attrnamespace = EXTATTR_NAMESPACE_USER;
+ attrname = name + 5;
+ } else {
+ errno = EINVAL;
+ return -1;
+ }
+
+ return extattr_delete_fd(filedes, attrnamespace, attrname);
+#elif defined(HAVE_XATTR_ATTR)
+ int flags = 0;
+ char *attrname = strchr(name,'.') + 1;
+
+ if (strncmp(name, "system", 6) == 0) flags |= ATTR_ROOT;
+
+ return attr_removef(filedes, attrname, flags);
+#elif defined(HAVE_ATTROPEN)
+ int ret = -1;
+ int attrdirfd = solaris_openat(filedes, ".", O_RDONLY|O_XATTR, 0);
+ if (attrdirfd >= 0) {
+ ret = solaris_unlinkat(attrdirfd, name);
+ close(attrdirfd);
+ }
+ return ret;
+#else
+ errno = ENOSYS;
+ return -1;
+#endif
+}
+
+int rep_setxattr (const char *path, const char *name, const void *value, size_t size, int flags)
+{
+ int retval = -1;
+#if defined(HAVE_XATTR_XATTR)
+#ifndef XATTR_ADDITIONAL_OPTIONS
+ retval = setxattr(path, name, value, size, flags);
+ if (retval < 0) {
+ if (errno == ENOSPC || errno == E2BIG) {
+ errno = ENAMETOOLONG;
+ }
+ }
+ return retval;
+#else
+/* So that we do not recursively call this function */
+#undef setxattr
+ retval = setxattr(path, name, value, size, 0, flags);
+ if (retval < 0) {
+ if (errno == E2BIG) {
+ errno = ENAMETOOLONG;
+ }
+ }
+ return retval;
+#endif
+#elif defined(HAVE_XATTR_EA)
+ if (flags) {
+ retval = getea(path, name, NULL, 0);
+ if (retval < 0) {
+ if (flags & XATTR_REPLACE && errno == ENOATTR) {
+ return -1;
+ }
+ } else {
+ if (flags & XATTR_CREATE) {
+ errno = EEXIST;
+ return -1;
+ }
+ }
+ }
+ retval = setea(path, name, value, size, 0);
+ return retval;
+#elif defined(HAVE_XATTR_EXTATTR)
+ int attrnamespace;
+ const char *attrname;
+
+ if (strncmp(name, "system.", 7) == 0) {
+ attrnamespace = EXTATTR_NAMESPACE_SYSTEM;
+ attrname = name + 7;
+ } else if (strncmp(name, "user.", 5) == 0) {
+ attrnamespace = EXTATTR_NAMESPACE_USER;
+ attrname = name + 5;
+ } else {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (flags) {
+ /* Check attribute existence */
+ retval = extattr_get_file(path, attrnamespace, attrname, NULL, 0);
+ if (retval < 0) {
+ /* REPLACE attribute, that doesn't exist */
+ if (flags & XATTR_REPLACE && errno == ENOATTR) {
+ errno = ENOATTR;
+ return -1;
+ }
+ /* Ignore other errors */
+ }
+ else {
+ /* CREATE attribute, that already exists */
+ if (flags & XATTR_CREATE) {
+ errno = EEXIST;
+ return -1;
+ }
+ }
+ }
+ retval = extattr_set_file(path, attrnamespace, attrname, value, size);
+ return (retval < 0) ? -1 : 0;
+#elif defined(HAVE_XATTR_ATTR)
+ int myflags = 0;
+ char *attrname = strchr(name,'.') + 1;
+
+ if (strncmp(name, "system", 6) == 0) myflags |= ATTR_ROOT;
+ if (flags & XATTR_CREATE) myflags |= ATTR_CREATE;
+ if (flags & XATTR_REPLACE) myflags |= ATTR_REPLACE;
+
+ retval = attr_set(path, attrname, (const char *)value, size, myflags);
+ if (retval < 0) {
+ if (errno == E2BIG) {
+ errno = ENAMETOOLONG;
+ }
+ }
+ return retval;
+#elif defined(HAVE_ATTROPEN)
+ int myflags = O_RDWR;
+ int attrfd;
+ if (flags & XATTR_CREATE) myflags |= O_EXCL;
+ if (!(flags & XATTR_REPLACE)) myflags |= O_CREAT;
+ attrfd = solaris_attropen(path, name, myflags, (mode_t) SOLARIS_ATTRMODE);
+ if (attrfd >= 0) {
+ retval = solaris_write_xattr(attrfd, value, size);
+ close(attrfd);
+ }
+ return retval;
+#else
+ errno = ENOSYS;
+ return -1;
+#endif
+}
+
+int rep_fsetxattr (int filedes, const char *name, const void *value, size_t size, int flags)
+{
+ int retval = -1;
+#if defined(HAVE_XATTR_XATTR)
+#ifndef XATTR_ADDITIONAL_OPTIONS
+ retval = fsetxattr(filedes, name, value, size, flags);
+ if (retval < 0) {
+ if (errno == ENOSPC) {
+ errno = ENAMETOOLONG;
+ }
+ }
+ return retval;
+#else
+/* So that we do not recursively call this function */
+#undef fsetxattr
+ retval = fsetxattr(filedes, name, value, size, 0, flags);
+ if (retval < 0) {
+ if (errno == E2BIG) {
+ errno = ENAMETOOLONG;
+ }
+ }
+ return retval;
+#endif
+#elif defined(HAVE_XATTR_EA)
+ if (flags) {
+ retval = fgetea(filedes, name, NULL, 0);
+ if (retval < 0) {
+ if (flags & XATTR_REPLACE && errno == ENOATTR) {
+ return -1;
+ }
+ } else {
+ if (flags & XATTR_CREATE) {
+ errno = EEXIST;
+ return -1;
+ }
+ }
+ }
+ retval = fsetea(filedes, name, value, size, 0);
+ return retval;
+#elif defined(HAVE_XATTR_EXTATTR)
+ int attrnamespace;
+ const char *attrname;
+
+ if (strncmp(name, "system.", 7) == 0) {
+ attrnamespace = EXTATTR_NAMESPACE_SYSTEM;
+ attrname = name + 7;
+ } else if (strncmp(name, "user.", 5) == 0) {
+ attrnamespace = EXTATTR_NAMESPACE_USER;
+ attrname = name + 5;
+ } else {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (flags) {
+ /* Check attribute existence */
+ retval = extattr_get_fd(filedes, attrnamespace, attrname, NULL, 0);
+ if (retval < 0) {
+ /* REPLACE attribute, that doesn't exist */
+ if (flags & XATTR_REPLACE && errno == ENOATTR) {
+ errno = ENOATTR;
+ return -1;
+ }
+ /* Ignore other errors */
+ }
+ else {
+ /* CREATE attribute, that already exists */
+ if (flags & XATTR_CREATE) {
+ errno = EEXIST;
+ return -1;
+ }
+ }
+ }
+ retval = extattr_set_fd(filedes, attrnamespace, attrname, value, size);
+ return (retval < 0) ? -1 : 0;
+#elif defined(HAVE_XATTR_ATTR)
+ int myflags = 0;
+ char *attrname = strchr(name,'.') + 1;
+
+ if (strncmp(name, "system", 6) == 0) myflags |= ATTR_ROOT;
+ if (flags & XATTR_CREATE) myflags |= ATTR_CREATE;
+ if (flags & XATTR_REPLACE) myflags |= ATTR_REPLACE;
+
+ return attr_setf(filedes, attrname, (const char *)value, size, myflags);
+#elif defined(HAVE_ATTROPEN)
+ int myflags = O_RDWR | O_XATTR;
+ int attrfd;
+ if (flags & XATTR_CREATE) myflags |= O_EXCL;
+ if (!(flags & XATTR_REPLACE)) myflags |= O_CREAT;
+ attrfd = solaris_openat(filedes, name, myflags, (mode_t) SOLARIS_ATTRMODE);
+ if (attrfd >= 0) {
+ retval = solaris_write_xattr(attrfd, value, size);
+ close(attrfd);
+ }
+ return retval;
+#else
+ errno = ENOSYS;
+ return -1;
+#endif
+}
+
+/**************************************************************************
+ helper functions for Solaris' EA support
+****************************************************************************/
+#ifdef HAVE_ATTROPEN
+static ssize_t solaris_read_xattr(int attrfd, void *value, size_t size)
+{
+ struct stat sbuf;
+
+ if (fstat(attrfd, &sbuf) == -1) {
+ errno = ENOATTR;
+ return -1;
+ }
+
+ /* This is to return the current size of the named extended attribute */
+ if (size == 0) {
+ return sbuf.st_size;
+ }
+
+ /* check size and read xattr */
+ if (sbuf.st_size > size) {
+ errno = ERANGE;
+ return -1;
+ }
+
+ return read(attrfd, value, sbuf.st_size);
+}
+
+static ssize_t solaris_list_xattr(int attrdirfd, char *list, size_t size)
+{
+ ssize_t len = 0;
+ DIR *dirp;
+ struct dirent *de;
+ int newfd = dup(attrdirfd);
+ /* CAUTION: The originating file descriptor should not be
+ used again following the call to fdopendir().
+ For that reason we dup() the file descriptor
+ here to make things more clear. */
+ dirp = fdopendir(newfd);
+
+ while ((de = readdir(dirp))) {
+ size_t listlen = strlen(de->d_name) + 1;
+ if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, "..")) {
+ /* we don't want "." and ".." here: */
+ continue;
+ }
+
+ if (size == 0) {
+ /* return the current size of the list of extended attribute names*/
+ len += listlen;
+ } else {
+ /* check size and copy entrieѕ + nul into list. */
+ if ((len + listlen) > size) {
+ errno = ERANGE;
+ len = -1;
+ break;
+ } else {
+ strlcpy(list + len, de->d_name, listlen);
+ len += listlen;
+ }
+ }
+ }
+
+ if (closedir(dirp) == -1) {
+ return -1;
+ }
+ return len;
+}
+
+static int solaris_unlinkat(int attrdirfd, const char *name)
+{
+ if (unlinkat(attrdirfd, name, 0) == -1) {
+ if (errno == ENOENT) {
+ errno = ENOATTR;
+ }
+ return -1;
+ }
+ return 0;
+}
+
+static int solaris_attropen(const char *path, const char *attrpath, int oflag, mode_t mode)
+{
+ int filedes = attropen(path, attrpath, oflag, mode);
+ if (filedes == -1) {
+ if (errno == EINVAL) {
+ errno = ENOTSUP;
+ } else {
+ errno = ENOATTR;
+ }
+ }
+ return filedes;
+}
+
+static int solaris_openat(int fildes, const char *path, int oflag, mode_t mode)
+{
+ int filedes = openat(fildes, path, oflag, mode);
+ if (filedes == -1) {
+ if (errno == EINVAL) {
+ errno = ENOTSUP;
+ } else {
+ errno = ENOATTR;
+ }
+ }
+ return filedes;
+}
+
+static int solaris_write_xattr(int attrfd, const char *value, size_t size)
+{
+ if ((ftruncate(attrfd, 0) == 0) && (write(attrfd, value, size) == size)) {
+ return 0;
+ } else {
+ return -1;
+ }
+}
+#endif /*HAVE_ATTROPEN*/
+
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-04 03:59:09 +0000