strace/printmode.c

/*
 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
 * Copyright (c) 1993-1996 Rick Sladkey <jrs@world.std.com>
 * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
 * Copyright (c) 2012 Denys Vlasenko <vda.linux@googlemail.com>
 * All rights reserved.
 *
 * 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, 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */

#include "defs.h"

#include <fcntl.h>
#include <sys/stat.h>

#include "xlat/modetypes.h"

const char *
sprintmode(int mode)
{
	static char buf[sizeof("S_IFSOCK|S_ISUID|S_ISGID|S_ISVTX|%o")
			+ sizeof(int)*3
			+ /*paranoia:*/ 8];
	const char *s;

	if ((mode & S_IFMT) == 0)
		s = "";
	else if ((s = xlookup(modetypes, mode & S_IFMT)) == NULL) {
		sprintf(buf, "%#o", mode);
		return buf;
	}
	s = buf + sprintf(buf, "%s%s%s%s", s,
		(mode & S_ISUID) ? "|S_ISUID" : "",
		(mode & S_ISGID) ? "|S_ISGID" : "",
		(mode & S_ISVTX) ? "|S_ISVTX" : "");
	mode &= ~(S_IFMT|S_ISUID|S_ISGID|S_ISVTX);
	if (mode)
		sprintf((char*)s, "|%#o", mode);
	s = (*buf == '|') ? buf + 1 : buf;
	return *s ? s : "0";
}