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fattr.c revision 1.6 
      1 /* $NetBSD: fattr.c,v 1.6 2007/01/17 21:59:50 hubertf Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the NetBSD
     18  *	Foundation, Inc. and its contributors.
     19  * 4. Neither the name of The NetBSD Foundation nor the names of its
     20  *    contributors may be used to endorse or promote products derived
     21  *    from this software without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     26  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     27  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     33  * POSSIBILITY OF SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 __RCSID("$NetBSD: fattr.c,v 1.6 2007/01/17 21:59:50 hubertf Exp $");
     39 #endif /* not lint */
     40 
     41 #include <sys/param.h>
     42 #include <sys/mount.h>
     43 #include <sys/stat.h>
     44 #include <ctype.h>
     45 #include <err.h>
     46 #include <grp.h>
     47 #include <pwd.h>
     48 #include <stdio.h>
     49 #include <stdlib.h>
     50 #include <string.h>
     51 #include <unistd.h>
     52 
     53 #include "fattr.h"
     54 
     55 int
     56 a_num(const char *s, const char *id_type)
     57 {
     58 	int id;
     59 	char *ep;
     60 
     61 	id = strtol(s, &ep, 0);
     62 	if (*ep || s == ep || id < 0)
     63 		errx(1, "unknown %s id: %s", id_type, s);
     64 	return id;
     65 }
     66 
     67 gid_t
     68 a_gid(const char *s)
     69 {
     70 	struct group *gr;
     71 
     72 	if ((gr = getgrnam(s)) != NULL)
     73 		return gr->gr_gid;
     74 	return a_num(s, "group");
     75 }
     76 
     77 uid_t
     78 a_uid(const char *s)
     79 {
     80 	struct passwd *pw;
     81 
     82 	if ((pw = getpwnam(s)) != NULL)
     83 		return pw->pw_uid;
     84 	return a_num(s, "user");
     85 }
     86 
     87 mode_t
     88 a_mask(const char *s)
     89 {
     90 	int rv;
     91 	char *ep;
     92 
     93 	rv = strtol(optarg, &ep, 8);
     94 	if (s == ep || *ep || rv < 0)
     95 		errx(1, "invalid file mode: %s", s);
     96 	return rv;
     97 }
     98