kc3-lang/libbsd/src/getpeereid.c

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• Hash : a4812cdf
  Author :
  Date : 2013-03-15T01:13:58
  

  Fix getpeereid() compilation on Solaris 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>

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• src/getpeereid.c

• /*
   * Copyright © 2010 Guillem Jover <guillem@hadrons.org>
   *
   * 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 ``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 <sys/cdefs.h>
  
  #include <sys/param.h>
  #include <sys/types.h>
  #include <sys/socket.h>
  #include <sys/un.h>
  
  #include <errno.h>
  #include <unistd.h>
  
  #if defined(SO_PEERCRED)
  /* Linux and OpenBSD */
  int
  getpeereid(int s, uid_t *euid, gid_t *egid)
  {
  /* XXX: This should be autodetected at build time instead. */
  #if defined(__linux__)
  	struct ucred cred;
  #elif defined(__OpenBSD__)
  	struct sockpeercred cred;
  #endif
  	socklen_t credlen = sizeof(cred);
  	int ret;
  
  	ret = getsockopt(s, SOL_SOCKET, SO_PEERCRED, &cred, &credlen);
  	if (ret != 0)
  		return ret;
  
  	*euid = cred.uid;
  	*egid = cred.gid;
  
  	return 0;
  }
  #elif defined(LOCAL_PEERCRED)
  /* FreeBSD */
  #include <sys/ucred.h>
  
  int
  getpeereid(int s, uid_t *euid, gid_t *egid)
  {
  	struct xucred cred;
  	socklen_t credlen = sizeof(cred);
  	int ret;
  
  	ret = getsockopt(s, 0, LOCAL_PEERCRED, &cred, &credlen);
  	if (ret != 0)
  		return ret;
  	if (cred.cr_version != XUCRED_VERSION)
  		return EINVAL;
  
  	*euid = cred.cr_uid;
  	*egid = cred.cr_gid;
  
  	return 0;
  }
  #elif defined(LOCAL_PEEREID)
  /* NetBSD */
  int
  getpeereid(int s, uid_t *euid, gid_t *egid)
  {
  	struct unpcbid cred;
  	socklen_t credlen = sizeof(cred);
  	int ret;
  
  	ret = getsockopt(s, 0, LOCAL_PEEREID, &cred, &credlen);
  	if (ret != 0)
  		return ret;
  
  	*euid = cred.unp_euid;
  	*egid = cred.unp_egid;
  
  	return 0;
  }
  #elif defined(__sun)
  /* Solaris */
  #include <alloca.h>
  #include <ucred.h>
  
  int
  getpeereid(int s, uid_t *euid, gid_t *egid)
  {
  	ucred_t *cred = alloca(ucred_size());
  	int ret;
  
  	ret = getpeerucred(s, &cred);
  	if (ret != 0)
  		return ret;
  
  	*euid = ucred_geteuid(cred);
  	if (*euid < 0)
  		return -1;
  	*egid = ucred_getegid(cred);
  	if (*egid < 0)
  		return -1;
  
  	return 0;
  }
  #else
  #warning "This platform needs an implementation of getpeereid()"
  int
  getpeereid(int s, uid_t *euid, gid_t *egid)
  {
  	*euid = geteuid();
  	*egid = getegid();
  
  	return 0;
  }
  #endif
  

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