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Diff for /src/usr.bin/at/Attic/privs.h between version 1.3 and 1.4

version 1.3, 1996/12/22 03:39:24 version 1.4, 1997/03/01 23:40:12
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 /*      $OpenBSD$       */  /*      $OpenBSD$       */
 /*      $NetBSD: privs.h,v 1.3 1995/03/25 18:13:41 glass Exp $  */  /*      $NetBSD: privs.h,v 1.3 1995/03/25 18:13:41 glass Exp $  */
   
 /*  /*
  * privs.h - header for privileged operations   *  privs.h - header for privileged operations
  * Copyright (c) 1993 by Thomas Koenig   *  Copyright (C) 1993  Thomas Koenig
  * All rights reserved.  
  *   *
  * Redistribution and use in source and binary forms, with or without   * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions   * modification, are permitted provided that the following conditions
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  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,   * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WETHER IN CONTRACT, STRICT LIABILITY, OR TORT   * THEORY OF LIABILITY, WETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *  
  */   */
   
 #ifndef _PRIVS_H  #ifndef _PRIVS_H
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 #include <unistd.h>  #include <unistd.h>
   
 /* Relinquish privileges temporarily for a setuid program  /* Relinquish privileges temporarily for a setuid or setgid program
  * with the option of getting them back later.  This is done by swapping   * with the option of getting them back later.  This is done by
  * the real and effective userid BSD style.  Call RELINQUISH_PRIVS once   * utilizing POSIX saved user and groups ids.  Call RELINQUISH_PRIVS once
  * at the beginning of the main program.  This will cause all operatons   * at the beginning of the main program.  This will cause all operatons
  * to be executed with the real userid.  When you need the privileges   * to be executed with the real userid.  When you need the privileges
  * of the setuid invocation, call PRIV_START; when you no longer   * of the setuid/setgid invocation, call PRIV_START; when you no longer
  * need it, call PRIV_END.  Note that it is an error to call PRIV_START   * need it, call PRIV_END.  Note that it is an error to call PRIV_START
  * and not PRIV_END within the same function.   * and not PRIV_END within the same function.
  *   *
  * Use RELINQUISH_PRIVS_ROOT(a) if your program started out running   * Use RELINQUISH_PRIVS_ROOT(a,b) if your program started out running
  * as root, and you want to drop back the effective userid to a   * as root, and you want to drop back the effective userid to a
  * and the effective group id to b, with the option to get them back   * and the effective group id to b, with the option to get them back
  * later.   * later.
  *   *
  * If you no longer need root privileges, but those of some other  
  * userid, you can call REDUCE_PRIV(a) when your effective  
  * is the user's.  
  *  
  * Problems: Do not use return between PRIV_START and PRIV_END; this   * Problems: Do not use return between PRIV_START and PRIV_END; this
  * will cause the program to continue running in an unprivileged   * will cause the program to continue running in an unprivileged
  * state.   * state.
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 #endif  #endif
 uid_t real_uid, effective_uid;  uid_t real_uid, effective_uid;
   
   #ifndef MAIN
   extern
   #endif
   gid_t real_gid, effective_gid;
   
 #define RELINQUISH_PRIVS { \  #define RELINQUISH_PRIVS { \
         real_uid = getuid(); \        real_uid = getuid(); \
         effective_uid = geteuid(); \        effective_uid = geteuid(); \
         seteuid(real_uid); \        real_gid = getgid(); \
         effective_gid = getegid(); \
         setegid(real_gid); \
         seteuid(real_uid); \
 }  }
   
 #define RELINQUISH_PRIVS_ROOT(a) { \  #define RELINQUISH_PRIVS_ROOT(a, b) { \
         real_uid = (a); \          real_uid = (a); \
         effective_uid = geteuid(); \          effective_uid = geteuid(); \
           real_gid = (b); \
           effective_gid = getegid(); \
           setegid(real_gid); \
         seteuid(real_uid); \          seteuid(real_uid); \
 }  }
   
 #define PRIV_START { \  #define PRIV_START { \
         seteuid(effective_uid);          seteuid(effective_uid); \
           setegid(effective_gid); \
   }
   
 #define PRIV_END \  #define PRIV_END { \
           setegid(real_gid); \
         seteuid(real_uid); \          seteuid(real_uid); \
 }  }
   
 #define REDUCE_PRIV(a) { \  
         real_uid = effective_uid = (a); \  
         seteuid(effective_uid); \  
         setuid(real_uid); \  
 }  
 #endif  #endif
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