101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/*-
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* Copyright (c) 1999-2001, 2008 Robert N. M. Watson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Support functionality for the POSIX.1e ACL interface
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* These calls are intended only to be called within the library.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include "namespace.h"
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#include <sys/acl.h>
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#include "un-namespace.h"
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#include <errno.h>
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#include <grp.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include "acl_support.h"
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/*
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* Given a uid/gid, return a username/groupname for the text form of an ACL.
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* Note that we truncate user and group names, rather than error out, as
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* this is consistent with other tools manipulating user and group names.
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* XXX NOT THREAD SAFE, RELIES ON GETPWUID, GETGRGID
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* XXX USES *PW* AND *GR* WHICH ARE STATEFUL AND THEREFORE THIS ROUTINE
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* MAY HAVE SIDE-EFFECTS
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*/
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int
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_posix1e_acl_id_to_name(acl_tag_t tag, uid_t id, ssize_t buf_len, char *buf,
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int flags)
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{
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struct group *g;
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struct passwd *p;
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int i;
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switch(tag) {
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case ACL_USER:
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if (flags & ACL_TEXT_NUMERIC_IDS)
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p = NULL;
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else
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p = getpwuid(id);
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if (!p)
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i = snprintf(buf, buf_len, "%d", id);
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else
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i = snprintf(buf, buf_len, "%s", p->pw_name);
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if (i < 0) {
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errno = ENOMEM;
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return (-1);
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}
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return (0);
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case ACL_GROUP:
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if (flags & ACL_TEXT_NUMERIC_IDS)
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g = NULL;
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else
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g = getgrgid(id);
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if (g == NULL)
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i = snprintf(buf, buf_len, "%d", id);
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else
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i = snprintf(buf, buf_len, "%s", g->gr_name);
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if (i < 0) {
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errno = ENOMEM;
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return (-1);
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}
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return (0);
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default:
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return (EINVAL);
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}
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}
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