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/*
* Copyright (c) Ian F. Darwin 1986-1995.
* Software written by Ian F. Darwin and others;
* maintained 1995-present by Christos Zoulas and others.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice immediately at the beginning of the file, without modification,
* this list of conditions, and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* fsmagic - magic based on filesystem info - directory, special files, etc.
*/
#include "file.h"
#ifndef lint
FILE_RCSID("@(#)$File: fsmagic.c,v 1.71 2013/12/01 18:01:07 christos Exp $")
#endif /* lint */
#include "magic.h"
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdlib.h>
/* Since major is a function on SVR4, we cannot use `ifndef major'. */
#ifdef MAJOR_IN_MKDEV
# include <sys/mkdev.h>
# define HAVE_MAJOR
#endif
#ifdef MAJOR_IN_SYSMACROS
# include <sys/sysmacros.h>
# define HAVE_MAJOR
#endif
#ifdef major /* Might be defined in sys/types.h. */
# define HAVE_MAJOR
#endif
#ifndef HAVE_MAJOR
# define major(dev) (((dev) >> 8) & 0xff)
# define minor(dev) ((dev) & 0xff)
#endif
#undef HAVE_MAJOR
#ifdef PHP_WIN32
# undef S_IFIFO
#endif
#ifndef S_ISDIR
#define S_ISDIR(mode) ((mode) & _S_IFDIR)
#endif
#ifndef S_ISREG
#define S_ISREG(mode) ((mode) & _S_IFREG)
#endif
private int
handle_mime(struct magic_set *ms, int mime, const char *str)
{
if ((mime & MAGIC_MIME_TYPE)) {
if (file_printf(ms, "inode/%s", str) == -1)
return -1;
if ((mime & MAGIC_MIME_ENCODING) && file_printf(ms,
"; charset=") == -1)
return -1;
}
if ((mime & MAGIC_MIME_ENCODING) && file_printf(ms, "binary") == -1)
return -1;
return 0;
}
protected int
file_fsmagic(struct magic_set *ms, const char *fn, struct stat *sb, php_stream *stream)
{
int ret, did = 0;
int mime = ms->flags & MAGIC_MIME;
TSRMLS_FETCH();
if (ms->flags & MAGIC_APPLE)
return 0;
if (fn == NULL && !stream) {
return 0;
}
#define COMMA (did++ ? ", " : "")
if (stream) {
php_stream_statbuf ssb;
if (php_stream_stat(stream, &ssb) < 0) {
if (ms->flags & MAGIC_ERROR) {
file_error(ms, errno, "cannot stat `%s'", fn);
return -1;
}
return 0;
}
memcpy(sb, &ssb.sb, sizeof(struct stat));
} else {
if (php_sys_stat(fn, sb) != 0) {
if (ms->flags & MAGIC_ERROR) {
file_error(ms, errno, "cannot stat `%s'", fn);
return -1;
}
return 0;
}
}
ret = 1;
if (!mime) {
#ifdef S_ISUID
if (sb->st_mode & S_ISUID)
if (file_printf(ms, "%ssetuid", COMMA) == -1)
return -1;
#endif
#ifdef S_ISGID
if (sb->st_mode & S_ISGID)
if (file_printf(ms, "%ssetgid", COMMA) == -1)
return -1;
#endif
#ifdef S_ISVTX
if (sb->st_mode & S_ISVTX)
if (file_printf(ms, "%ssticky", COMMA) == -1)
return -1;
#endif
}
switch (sb->st_mode & S_IFMT) {
#ifndef PHP_WIN32
# ifdef S_IFCHR
case S_IFCHR:
/*
* If -s has been specified, treat character special files
* like ordinary files. Otherwise, just report that they
* are block special files and go on to the next file.
*/
if ((ms->flags & MAGIC_DEVICES) != 0) {
ret = 0;
break;
}
if (mime) {
if (handle_mime(ms, mime, "chardevice") == -1)
return -1;
} else {
# ifdef HAVE_STAT_ST_RDEV
# ifdef dv_unit
if (file_printf(ms, "%scharacter special (%d/%d/%d)",
COMMA, major(sb->st_rdev), dv_unit(sb->st_rdev),
dv_subunit(sb->st_rdev)) == -1)
return -1;
# else
if (file_printf(ms, "%scharacter special (%ld/%ld)",
COMMA, (long)major(sb->st_rdev),
(long)minor(sb->st_rdev)) == -1)
return -1;
# endif
#else
if (file_printf(ms, "%scharacter special", COMMA) == -1)
return -1;
#endif
}
return 1;
# endif
#endif
#ifdef S_IFIFO
case S_IFIFO:
if((ms->flags & MAGIC_DEVICES) != 0)
break;
if (mime) {
if (handle_mime(ms, mime, "fifo") == -1)
return -1;
} else if (file_printf(ms, "%sfifo (named pipe)", COMMA) == -1)
return -1;
break;
#endif
#ifdef S_IFDOOR
case S_IFDOOR:
if (mime) {
if (handle_mime(ms, mime, "door") == -1)
return -1;
} else if (file_printf(ms, "%sdoor", COMMA) == -1)
return -1;
break;
#endif
#ifdef S_IFLNK
case S_IFLNK:
/* stat is used, if it made here then the link is broken */
if (ms->flags & MAGIC_ERROR) {
file_error(ms, errno, "unreadable symlink `%s'", fn);
return -1;
}
return 1;
#endif
#ifdef S_IFSOCK
#ifndef __COHERENT__
case S_IFSOCK:
if (mime) {
if (handle_mime(ms, mime, "socket") == -1)
return -1;
} else if (file_printf(ms, "%ssocket", COMMA) == -1)
return -1;
break;
#endif
#endif
case S_IFREG:
/*
* regular file, check next possibility
*
* If stat() tells us the file has zero length, report here that
* the file is empty, so we can skip all the work of opening and
* reading the file.
* But if the -s option has been given, we skip this
* optimization, since on some systems, stat() reports zero
* size for raw disk partitions. (If the block special device
* really has zero length, the fact that it is empty will be
* detected and reported correctly when we read the file.)
*/
if ((ms->flags & MAGIC_DEVICES) == 0 && sb->st_size == 0) {
if (mime) {
if (handle_mime(ms, mime, "x-empty") == -1)
return -1;
} else if (file_printf(ms, "%sempty", COMMA) == -1)
return -1;
break;
}
ret = 0;
break;
default:
file_error(ms, 0, "invalid mode 0%o", sb->st_mode);
return -1;
/*NOTREACHED*/
}
return ret;
}
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