mirror of https://github.com/pbatard/rufus.git
191 lines
5.0 KiB
C
191 lines
5.0 KiB
C
/*
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Copyright (C) 2003, 2005, 2008, 2011 Rocky Bernstein <rocky@gnu.org>
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Copyright (C) 2000 Herbert Valerio Riedel <hvr@gnu.org>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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# define __CDIO_CONFIG_H__ 1
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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/*! String inside frame which identifies XA attributes. Note should
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come *before* public headers which does a #define of
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this name.
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*/
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const char ISO_XA_MARKER_STRING[] = {'C', 'D', '-', 'X', 'A', '0', '0', '1'};
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/* Public headers */
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#include <cdio/iso9660.h>
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#include <cdio/util.h>
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#include <cdio/bytesex.h>
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/* Private headers */
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#include "cdio_assert.h"
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#include "filemode.h"
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/** The below variable is trickery to force enum symbol values to be
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recorded in debug symbol tables. It is used to allow one to refer
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to the enumeration value names in the typedefs above in a debugger
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and debugger expressions.
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*/
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xa_misc_enum_t debugger_xa_misc_enum;
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#define BUF_COUNT 16
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#define BUF_SIZE 80
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/* Return a pointer to a internal free buffer */
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static char *
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_getbuf (void)
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{
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static char _buf[BUF_COUNT][BUF_SIZE];
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static int _num = -1;
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_num++;
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_num %= BUF_COUNT;
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memset (_buf[_num], 0, BUF_SIZE);
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return _buf[_num];
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}
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/*!
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Returns a string which interpreting the extended attribute xa_attr.
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For example:
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\verbatim
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d---1xrxrxr
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---2--r-r-r
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-a--1xrxrxr
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\endverbatim
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A description of the characters in the string follows
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The 1st character is either "d" if the entry is a directory, or "-" if not.
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The 2nd character is either "a" if the entry is CDDA (audio), or "-" if not.
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The 3rd character is either "i" if the entry is interleaved, or "-" if not.
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The 4th character is either "2" if the entry is mode2 form2 or "-" if not.
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The 5th character is either "1" if the entry is mode2 form1 or "-" if not.
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Note that an entry will either be in mode2 form1 or mode form2. That
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is you will either see "2-" or "-1" in the 4th & 5th positions.
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The 6th and 7th characters refer to permissions for a user while the
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the 8th and 9th characters refer to permissions for a group while, and
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the 10th and 11th characters refer to permissions for a others.
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In each of these pairs the first character (6, 8, 10) is "x" if the
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entry is executable. For a directory this means the directory is
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allowed to be listed or "searched".
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The second character of a pair (7, 9, 11) is "r" if the entry is allowed
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to be read.
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*/
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const char *
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iso9660_get_xa_attr_str (uint16_t xa_attr)
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{
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char *result = _getbuf();
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xa_attr = uint16_from_be (xa_attr);
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result[ 0] = (xa_attr & XA_ATTR_DIRECTORY) ? 'd' : '-';
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result[ 1] = (xa_attr & XA_ATTR_CDDA) ? 'a' : '-';
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result[ 2] = (xa_attr & XA_ATTR_INTERLEAVED) ? 'i' : '-';
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result[ 3] = (xa_attr & XA_ATTR_MODE2FORM2) ? '2' : '-';
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result[ 4] = (xa_attr & XA_ATTR_MODE2FORM1) ? '1' : '-';
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result[ 5] = (xa_attr & XA_PERM_XUSR) ? 'x' : '-';
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result[ 6] = (xa_attr & XA_PERM_RUSR) ? 'r' : '-';
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result[ 7] = (xa_attr & XA_PERM_XGRP) ? 'x' : '-';
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result[ 8] = (xa_attr & XA_PERM_RGRP) ? 'r' : '-';
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/* Hack alert: wonder if this should be ROTH and XOTH? */
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result[ 9] = (xa_attr & XA_PERM_XSYS) ? 'x' : '-';
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result[10] = (xa_attr & XA_PERM_RSYS) ? 'r' : '-';
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result[11] = '\0';
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return result;
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}
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iso9660_xa_t *
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iso9660_xa_init (iso9660_xa_t *_xa, uint16_t uid, uint16_t gid, uint16_t attr,
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uint8_t filenum)
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{
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cdio_assert (_xa != NULL);
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_xa->user_id = uint16_to_be (uid);
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_xa->group_id = uint16_to_be (gid);
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_xa->attributes = uint16_to_be (attr);
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_xa->signature[0] = 'X';
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_xa->signature[1] = 'A';
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_xa->filenum = filenum;
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_xa->reserved[0]
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= _xa->reserved[1]
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= _xa->reserved[2]
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= _xa->reserved[3]
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= _xa->reserved[4] = 0x00;
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return _xa;
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}
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void
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iso9660_xa_free (iso9660_xa_t *_xa)
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{
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if (_xa != NULL)
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free(_xa);
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}
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/*!
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Returns POSIX mode bitstring for a given file.
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*/
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posix_mode_t
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iso9660_get_posix_filemode_from_xa(uint16_t i_perms)
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{
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posix_mode_t mode = 0;
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if (i_perms & XA_PERM_RUSR) mode |= S_IRUSR;
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if (i_perms & XA_PERM_XUSR) mode |= S_IXUSR;
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#ifdef S_IRGRP
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if (i_perms & XA_PERM_RGRP) mode |= S_IRGRP;
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#endif
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#ifdef S_IXGRP
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if (i_perms & XA_PERM_XGRP) mode |= S_IXGRP;
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#endif
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#ifdef S_IROTH
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if (i_perms & XA_PERM_ROTH) mode |= S_IROTH;
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#endif
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#ifdef S_IXOTH
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if (i_perms & XA_PERM_XOTH) mode |= S_IXOTH;
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#endif
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if (i_perms & XA_ATTR_DIRECTORY) mode |= S_IFDIR;
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return mode;
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}
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