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a4812cdf24
The code in getpeereid() is unlikely to compile as ucred_t is an opaque struct (ucred_t * works but ucred_t does not). Either you need to give a pointer initialized to NULL and getpeerucred() allocates a new ucred or you call it with an allocated ucred as in this patch. Signed-off-by: Guillem Jover <guillem@hadrons.org>
135 lines
3.2 KiB
C
135 lines
3.2 KiB
C
/*
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* Copyright © 2010 Guillem Jover <guillem@hadrons.org>
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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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <errno.h>
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#include <unistd.h>
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#if defined(SO_PEERCRED)
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/* Linux and OpenBSD */
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int
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getpeereid(int s, uid_t *euid, gid_t *egid)
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{
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/* XXX: This should be autodetected at build time instead. */
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#if defined(__linux__)
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struct ucred cred;
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#elif defined(__OpenBSD__)
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struct sockpeercred cred;
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#endif
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socklen_t credlen = sizeof(cred);
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int ret;
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ret = getsockopt(s, SOL_SOCKET, SO_PEERCRED, &cred, &credlen);
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if (ret != 0)
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return ret;
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*euid = cred.uid;
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*egid = cred.gid;
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return 0;
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}
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#elif defined(LOCAL_PEERCRED)
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/* FreeBSD */
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#include <sys/ucred.h>
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int
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getpeereid(int s, uid_t *euid, gid_t *egid)
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{
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struct xucred cred;
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socklen_t credlen = sizeof(cred);
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int ret;
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ret = getsockopt(s, 0, LOCAL_PEERCRED, &cred, &credlen);
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if (ret != 0)
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return ret;
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if (cred.cr_version != XUCRED_VERSION)
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return EINVAL;
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*euid = cred.cr_uid;
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*egid = cred.cr_gid;
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return 0;
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}
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#elif defined(LOCAL_PEEREID)
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/* NetBSD */
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int
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getpeereid(int s, uid_t *euid, gid_t *egid)
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{
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struct unpcbid cred;
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socklen_t credlen = sizeof(cred);
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int ret;
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ret = getsockopt(s, 0, LOCAL_PEEREID, &cred, &credlen);
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if (ret != 0)
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return ret;
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*euid = cred.unp_euid;
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*egid = cred.unp_egid;
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return 0;
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}
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#elif defined(__sun)
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/* Solaris */
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#include <alloca.h>
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#include <ucred.h>
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int
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getpeereid(int s, uid_t *euid, gid_t *egid)
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{
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ucred_t *cred = alloca(ucred_size());
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int ret;
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ret = getpeerucred(s, &cred);
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if (ret != 0)
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return ret;
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*euid = ucred_geteuid(cred);
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if (*euid < 0)
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return -1;
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*egid = ucred_getegid(cred);
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if (*egid < 0)
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return -1;
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return 0;
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}
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#else
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#warning "This platform needs an implementation of getpeereid()"
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int
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getpeereid(int s, uid_t *euid, gid_t *egid)
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{
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*euid = geteuid();
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*egid = getegid();
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return 0;
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}
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#endif
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