runtime/kdesu/kdesud/secure.cpp

   1 /* vi: ts=8 sts=4 sw=4
   2  *
   3  * This file is part of the KDE project, module kdesu.
   4  * Copyright (C) 1999,2000 Geert Jansen <g.t.jansen@stud.tue.nl>
   5  *
   6  * secure.cpp: Peer credentials for a UNIX socket.
   7  */
   8
   9 #include "secure.h"
  10
  11 #include <config-runtime.h>
  12
  13 #include <stdio.h>
  14 #include <unistd.h>
  15 #include <fcntl.h>
  16 #include <string.h>
  17 #include <errno.h>
  18
  19 #include <sys/types.h>
  20 #include <sys/stat.h>
  21 #include <sys/socket.h>
  22
  23 #include <kdebug.h>
  24
  25 // FIXME: This is just here to make it compile (since ksock* was removed from kdelibs).
  26 // It would be better to fix it more globally. (Caleb Tennis)
  27 typedef unsigned ksocklen_t;
  28
  29 /**
  30  * Under Linux, Socket_security is supported.
  31  */
  32
  33 #if defined(SO_PEERCRED)
  34
  35 SocketSecurity::SocketSecurity(int sockfd) : pid(-1), gid(-1), uid(-1)
  36 {
  37     ucred cred;
  38     ksocklen_t len = sizeof(struct ucred);
  39     if (getsockopt(sockfd, SOL_SOCKET, SO_PEERCRED, &cred, &len) < 0) {
  40         kError() << "getsockopt(SO_PEERCRED) " << perror << endl;
  41         return;
  42     }
  43     pid = cred.pid;
  44     gid = cred.gid;
  45     uid = cred.uid;
  46 }
  47
  48 #else
  49 # if defined(HAVE_GETPEEREID)
  50 SocketSecurity::SocketSecurity(int sockfd) : pid(-1), gid(-1), uid(-1)
  51 {
  52     uid_t euid;
  53     gid_t egid;
  54     if (getpeereid(sockfd, &euid, &egid) == 0) {
  55         uid = euid;
  56         gid = egid;
  57         pid = -1;
  58     }
  59 }
  60
  61 # else
  62 #ifdef __GNUC__
  63 #warning SocketSecurity support for your platform not implemented/available!
  64 #endif
  65 /**
  66  * The default version does nothing.
  67  */
  68
  69 SocketSecurity::SocketSecurity(int sockfd) : pid(-1), gid(-1), uid(-1)
  70 {
  71     static bool warned_him = false;
  72
  73     if (!warned_him) {
  74         kWarning() << "Using void socket security. Please add support for your" ;
  75         kWarning() << "platform to kdesu/kdesud/secure.cpp" ;
  76         warned_him = true;
  77     }
  78
  79     // This passes the test made in handler.cpp
  80     uid = getuid();
  81 }
  82
  83 # endif
  84 #endif