getset.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 /* This file handles the 4 system calls that get and set uids and gids.
    2  * It also handles getpid(), setsid(), and getpgrp().  The code for each
    3  * one is so tiny that it hardly seemed worthwhile to make each a separate
    4  * function.
    5  */
    6 
    7 #include "pm.h"
    8 #include <minix/callnr.h>
    9 #include <signal.h>
   10 #include "mproc.h"
   11 #include "param.h"
   12 
   13 /*===========================================================================*
   14  *                              do_getset                                    *
   15  *===========================================================================*/
   16 PUBLIC int do_getset()
   17 {
   18 /* Handle GETUID, GETGID, GETPID, GETPGRP, SETUID, SETGID, SETSID.  The four
   19  * GETs and SETSID return their primary results in 'r'.  GETUID, GETGID, and
   20  * GETPID also return secondary results (the effective IDs, or the parent
   21  * process ID) in 'reply_res2', which is returned to the user.
   22  */
   23 
   24   register struct mproc *rmp = mp;
   25   register int r;
   26 
   27   switch(call_nr) {
   28         case GETUID:
   29                 r = rmp->mp_realuid;
   30                 rmp->mp_reply.reply_res2 = rmp->mp_effuid;
   31                 break;
   32 
   33         case GETGID:
   34                 r = rmp->mp_realgid;
   35                 rmp->mp_reply.reply_res2 = rmp->mp_effgid;
   36                 break;
   37 
   38         case GETPID:
   39                 r = mproc[who].mp_pid;
   40                 rmp->mp_reply.reply_res2 = mproc[rmp->mp_parent].mp_pid;
   41                 if (m_in.procnr >= 0 && m_in.procnr < NR_PROCS) 
   42                         rmp->mp_reply.reply_res3 = mproc[m_in.procnr].mp_pid;
   43                 break;
   44 
   45         case SETUID:
   46                 if (rmp->mp_realuid != (uid_t) m_in.usr_id && 
   47                                 rmp->mp_effuid != SUPER_USER)
   48                         return(EPERM);
   49                 rmp->mp_realuid = (uid_t) m_in.usr_id;
   50                 rmp->mp_effuid = (uid_t) m_in.usr_id;
   51                 tell_fs(SETUID, who, rmp->mp_realuid, rmp->mp_effuid);
   52                 r = OK;
   53                 break;
   54 
   55         case SETGID:
   56                 if (rmp->mp_realgid != (gid_t) m_in.grp_id && 
   57                                 rmp->mp_effuid != SUPER_USER)
   58                         return(EPERM);
   59                 rmp->mp_realgid = (gid_t) m_in.grp_id;
   60                 rmp->mp_effgid = (gid_t) m_in.grp_id;
   61                 tell_fs(SETGID, who, rmp->mp_realgid, rmp->mp_effgid);
   62                 r = OK;
   63                 break;
   64 
   65         case SETSID:
   66                 if (rmp->mp_procgrp == rmp->mp_pid) return(EPERM);
   67                 rmp->mp_procgrp = rmp->mp_pid;
   68                 tell_fs(SETSID, who, 0, 0);
   69                 /* fall through */
   70 
   71         case GETPGRP:
   72                 r = rmp->mp_procgrp;
   73                 break;
   74 
   75         default:
   76                 r = EINVAL;
   77                 break;  
   78   }
   79   return(r);
   80 }

Cache object: 8ca8f842405c904f4e4a43af4a9dd2c5

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/servers/pm/getset.c

FreeBSD/Linux Kernel Cross Reference
sys/servers/pm/getset.c