include/sys/ucred.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  *
  25  * File with private definitions for the ucred structure for use by the
  26  * kernel and library routines.
  27  */
  28
  29 #ifndef _SYS_UCRED_H
  30 #define _SYS_UCRED_H
  31
  32 #include <sys/types.h>
  33 #include <sys/procfs.h>
  34 #include <sys/cred.h>
  35 #include <sys/priv.h>
  36
  37 #ifndef _KERNEL
  38 #include <unistd.h>
  39 #endif
  40
  41 #ifdef  __cplusplus
  42 extern "C" {
  43 #endif
  44
  45
  46
  47 #if defined(_KERNEL) || _STRUCTURED_PROC != 0
  48 /*
  49  * bitness neutral struct
  50  *
  51  * Add new fixed fields at the end of the structure.
  52  */
  53 struct ucred_s {
  54         uint32_t        uc_size;        /* Size of the full structure */
  55         uint32_t        uc_credoff;     /* Credential offset: 0 - no cred */
  56         uint32_t        uc_privoff;     /* Privilege offset: 0 - no privs */
  57         pid_t           uc_pid;         /* Process id */
  58         zoneid_t        uc_zoneid;      /* Zone id */
  59         projid_t        uc_projid;      /* Project id */
  60                                         /* The rest goes here */
  61 };
  62
  63 /* Get the process credentials */
  64 #define UCCRED(uc)      (prcred_t *)(((uc)->uc_credoff == 0) ? NULL : \
  65                                 ((char *)(uc)) + (uc)->uc_credoff)
  66
  67 /* Get the process privileges */
  68 #define UCPRIV(uc)      (prpriv_t *)(((uc)->uc_privoff == 0) ? NULL : \
  69                                 ((char *)(uc)) + (uc)->uc_privoff)
  70
  71 #endif /* _KERNEL || _STRUCTURED_PROC != 0 */
  72
  73 /*
  74  * SYS_ucredsys subcodes.
  75  */
  76 #define UCREDSYS_UCREDGET       0
  77 #define UCREDSYS_GETPEERUCRED   1
  78
  79 #ifdef _KERNEL
  80
  81 extern uint32_t ucredminsize(const cred_t *);
  82
  83 #define UCRED_PRIV_OFF  (sizeof (struct ucred_s))
  84 /* The prcred_t has a variable size; it should be last. */
  85 #define UCRED_CRED_OFF  (UCRED_PRIV_OFF + priv_prgetprivsize(NULL))
  86
  87 #define UCRED_SIZE      (UCRED_CRED_OFF + sizeof (prcred_t) + \
  88                             (ngroups_max - 1) * sizeof (gid_t))
  89
  90
  91 struct proc;
  92
  93 extern struct ucred_s *pgetucred(struct proc *);
  94 extern struct ucred_s *cred2ucred(const cred_t *, pid_t, void *,
  95     const cred_t *);
  96
  97 #else
  98
  99 /* Definition only valid for structured proc. */
 100 #if _STRUCTURED_PROC != 0
 101 #define UCRED_SIZE(ip)  (sizeof (struct ucred_s) + sizeof (prcred_t) + \
 102                         ((int)sysconf(_SC_NGROUPS_MAX) - 1) * sizeof (gid_t) + \
 103                         sizeof (prpriv_t) + \
 104                         sizeof (priv_chunk_t) * \
 105                         ((ip)->priv_setsize * (ip)->priv_nsets - 1) + \
 106                         (ip)->priv_infosize)
 107 #endif
 108
 109 extern struct ucred_s *_ucred_alloc(void);
 110
 111 #endif
 112
 113 #ifdef  __cplusplus
 114 }
 115 #endif
 116
 117 #endif  /* _SYS_UCRED_H */