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72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
/*
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* Unsquash a squashfs filesystem. This is a highly compressed read only
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* filesystem.
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*
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* Copyright (c) 2010
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* Phillip Lougher <phillip@lougher.demon.co.uk>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2,
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* or (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* unsquashfs_xattr.c
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*/
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#include "unsquashfs.h"
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#include "xattr.h"
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#include <sys/xattr.h>
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extern int root_process;
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void write_xattr(char *pathname, unsigned int xattr)
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{
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unsigned int count;
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struct xattr_list *xattr_list;
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int i;
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if(xattr == SQUASHFS_INVALID_XATTR ||
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sBlk.s.xattr_id_table_start == SQUASHFS_INVALID_BLK)
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return;
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xattr_list = get_xattr(xattr, &count);
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if(xattr_list == NULL) {
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ERROR("Failed to read xattrs for file %s\n", pathname);
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return;
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}
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for(i = 0; i < count; i++) {
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int prefix = xattr_list[i].type & SQUASHFS_XATTR_PREFIX_MASK;
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if(root_process || prefix == SQUASHFS_XATTR_USER) {
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int res = lsetxattr(pathname, xattr_list[i].full_name,
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xattr_list[i].value, xattr_list[i].vsize, 0);
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if(res == -1)
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ERROR("write_xattr: failed to write xattr %s"
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" for file %s because %s\n",
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xattr_list[i].full_name, pathname,
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errno == ENOSPC || errno == EDQUOT ?
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"no extended attribute space remaining "
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"on destination filesystem" :
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errno == ENOTSUP ?
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"extended attributes are not supported "
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"by the destination filesystem" :
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"a weird error occurred");
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} else
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ERROR("write_xattr: could not write xattr %s "
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"for file %s because you're not "
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"superuser!\n",
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xattr_list[i].full_name, pathname);
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}
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}
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