FreeBSD/Linux Kernel Cross Reference
sys/sys/ucred.h

     /*      $NetBSD: ucred.h,v 1.31 2006/07/16 21:13:00 elad Exp $  */
     
     /*
      * Copyright (c) 1989, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * 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. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
     *
     *      @(#)ucred.h     8.4 (Berkeley) 1/9/95
     */
    
    #ifndef _SYS_UCRED_H_
    #define _SYS_UCRED_H_
    
    #include <sys/param.h>
    
    /*
     * Credentials.
     */
    
    /* Userland's view of credentials. This should not change */
    struct uucred {
            u_short         cr_unused;              /* not used, compat */
            uid_t           cr_uid;                 /* effective user id */
            gid_t           cr_gid;                 /* effective group id */
            short           cr_ngroups;             /* number of groups */
            gid_t           cr_groups[NGROUPS];     /* groups */
    };
    
    struct ucred {
            uint32_t        cr_ref;                 /* reference count */
    #define cr_startcopy    cr_uid                  /* for dup & copy */
            uid_t           cr_uid;                 /* effective user id */
            gid_t           cr_gid;                 /* effective group id */
            uint32_t        cr_ngroups;             /* number of groups */
            gid_t           cr_groups[NGROUPS];     /* groups */
    };
    
    #ifdef _KERNEL
    
    /*
     * flags that control when do_setres{u,g}id will do anything
     *
     * ID_XXX_EQ_YYY means
     * "allow modifying XXX uid to the given value if the new value of
     * XXX uid (or gid) equals the current value of YYY uid (or gid)."
     */
    
    #define ID_E_EQ_E       0x001           /* effective equals effective */
    #define ID_E_EQ_R       0x002           /* effective equals real */
    #define ID_E_EQ_S       0x004           /* effective equals saved */
    #define ID_R_EQ_E       0x010           /* real equals effective */
    #define ID_R_EQ_R       0x020           /* real equals real */
    #define ID_R_EQ_S       0x040           /* real equals saved */
    #define ID_S_EQ_E       0x100           /* saved equals effective */
    #define ID_S_EQ_R       0x200           /* saved equals real */
    #define ID_S_EQ_S       0x400           /* saved equals saved */
    
    int             do_setresuid(struct lwp *, uid_t, uid_t, uid_t, u_int);
    int             do_setresgid(struct lwp *, gid_t, gid_t, gid_t, u_int);
    
    #endif /* _KERNEL */
    
    #endif /* !_SYS_UCRED_H_ */

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