479 lines
11 KiB
C++
479 lines
11 KiB
C++
/* uinfo.cc: user info (uid, gid, etc...)
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include <pwd.h>
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#include <unistd.h>
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#include <winnls.h>
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#include <wininet.h>
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#include <utmp.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <lm.h>
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#include <errno.h>
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#include <sys/cygwin.h>
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#include "pinfo.h"
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#include "security.h"
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#include "fhandler.h"
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#include "path.h"
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#include "dtable.h"
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#include "cygerrno.h"
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#include "cygheap.h"
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#include "registry.h"
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#include "child_info.h"
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#include "environ.h"
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#include "pwdgrp.h"
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void
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internal_getlogin (cygheap_user &user)
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{
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struct passwd *pw = NULL;
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HANDLE ptok = INVALID_HANDLE_VALUE;
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myself->gid = DEFAULT_GID;
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if (wincap.has_security ())
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{
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DWORD siz;
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cygsid tu;
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DWORD ret = 0;
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/* Try to get the SID either from current process and
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store it in user.psid */
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if (!OpenProcessToken (hMainProc, TOKEN_ADJUST_DEFAULT | TOKEN_QUERY,
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&ptok))
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system_printf ("OpenProcessToken(): %E");
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else if (!GetTokenInformation (ptok, TokenUser, &tu, sizeof tu, &siz))
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system_printf ("GetTokenInformation (TokenUser): %E");
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else if (!(ret = user.set_sid (tu)))
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system_printf ("Couldn't retrieve SID from access token!");
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else if (!GetTokenInformation (ptok, TokenPrimaryGroup,
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&user.groups.pgsid, sizeof tu, &siz))
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system_printf ("GetTokenInformation (TokenPrimaryGroup): %E");
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/* We must set the user name, uid and gid.
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If we have a SID, try to get the corresponding Cygwin
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password entry. Set user name which can be different
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from the Windows user name */
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if (ret)
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{
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pw = internal_getpwsid (tu);
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/* Set token owner to the same value as token user */
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if (!SetTokenInformation (ptok, TokenOwner, &tu, sizeof tu))
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debug_printf ("SetTokenInformation(TokenOwner): %E");
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}
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}
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if (!pw && !(pw = internal_getpwnam (user.name ()))
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&& !(pw = internal_getpwuid (DEFAULT_UID)))
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debug_printf("user not found in augmented /etc/passwd");
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else
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{
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myself->uid = pw->pw_uid;
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myself->gid = pw->pw_gid;
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user.set_name (pw->pw_name);
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if (wincap.has_security ())
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{
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cygsid gsid;
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if (gsid.getfromgr (internal_getgrgid (pw->pw_gid)))
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{
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/* Set primary group to the group in /etc/passwd. */
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user.groups.pgsid = gsid;
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if (!SetTokenInformation (ptok, TokenPrimaryGroup,
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&gsid, sizeof gsid))
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debug_printf ("SetTokenInformation(TokenPrimaryGroup): %E");
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}
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else
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debug_printf ("gsid not found in augmented /etc/group");
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}
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}
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if (ptok != INVALID_HANDLE_VALUE)
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CloseHandle (ptok);
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(void) cygheap->user.ontherange (CH_HOME, pw);
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return;
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}
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void
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uinfo_init ()
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{
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if (!child_proc_info)
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internal_getlogin (cygheap->user); /* Set the cygheap->user. */
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/* Real and effective uid/gid are identical on process start up. */
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cygheap->user.orig_uid = cygheap->user.real_uid = myself->uid;
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cygheap->user.orig_gid = cygheap->user.real_gid = myself->gid;
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cygheap->user.set_orig_sid (); /* Update the original sid */
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cygheap->user.token = INVALID_HANDLE_VALUE; /* No token present */
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}
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extern "C" char *
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getlogin (void)
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{
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#ifdef _MT_SAFE
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char *this_username=_reent_winsup ()->_username;
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#else
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static char this_username[UNLEN + 1] NO_COPY;
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#endif
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return strcpy (this_username, cygheap->user.name ());
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}
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extern "C" __uid32_t
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getuid32 (void)
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{
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return cygheap->user.real_uid;
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}
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extern "C" __uid16_t
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getuid (void)
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{
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return cygheap->user.real_uid;
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}
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extern "C" __gid32_t
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getgid32 (void)
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{
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return cygheap->user.real_gid;
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}
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extern "C" __gid16_t
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getgid (void)
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{
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return cygheap->user.real_gid;
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}
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extern "C" __uid32_t
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geteuid32 (void)
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{
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return myself->uid;
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}
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extern "C" __uid16_t
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geteuid (void)
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{
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return myself->uid;
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}
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extern "C" __gid32_t
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getegid32 (void)
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{
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return myself->gid;
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}
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extern "C" __gid16_t
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getegid (void)
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{
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return myself->gid;
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}
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/* Not quite right - cuserid can change, getlogin can't */
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extern "C" char *
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cuserid (char *src)
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{
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if (!src)
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return getlogin ();
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strcpy (src, getlogin ());
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return src;
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}
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const char *
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cygheap_user::ontherange (homebodies what, struct passwd *pw)
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{
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LPUSER_INFO_3 ui = NULL;
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WCHAR wuser[UNLEN + 1];
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NET_API_STATUS ret;
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char homepath_env_buf[MAX_PATH + 1];
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char homedrive_env_buf[3];
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char *newhomedrive = NULL;
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char *newhomepath = NULL;
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debug_printf ("what %d, pw %p", what, pw);
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if (what == CH_HOME)
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{
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char *p;
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if (homedrive)
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newhomedrive = homedrive;
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else if ((p = getenv ("HOMEDRIVE")))
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newhomedrive = p;
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if (homepath)
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newhomepath = homepath;
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else if ((p = getenv ("HOMEPATH")))
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newhomepath = p;
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if ((p = getenv ("HOME")))
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debug_printf ("HOME is already in the environment %s", p);
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else
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{
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if (!pw)
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pw = internal_getpwnam (name ());
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if (pw && pw->pw_dir && *pw->pw_dir)
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{
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debug_printf ("Set HOME (from /etc/passwd) to %s", pw->pw_dir);
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setenv ("HOME", pw->pw_dir, 1);
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}
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else if (!newhomedrive || !newhomepath)
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setenv ("HOME", "/", 1);
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else
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{
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char home[MAX_PATH];
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char buf[MAX_PATH + 1];
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strcpy (buf, newhomedrive);
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strcat (buf, newhomepath);
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cygwin_conv_to_full_posix_path (buf, home);
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debug_printf ("Set HOME (from HOMEDRIVE/HOMEPATH) to %s", home);
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setenv ("HOME", home, 1);
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}
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}
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}
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if (what != CH_HOME && homepath == NULL && newhomepath == NULL)
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{
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if (!pw)
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pw = internal_getpwnam (name ());
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if (pw && pw->pw_dir && *pw->pw_dir)
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cygwin_conv_to_full_win32_path (pw->pw_dir, homepath_env_buf);
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else
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{
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homepath_env_buf[0] = homepath_env_buf[1] = '\0';
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if (logsrv ())
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{
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WCHAR wlogsrv[INTERNET_MAX_HOST_NAME_LENGTH + 3];
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sys_mbstowcs (wlogsrv, logsrv (),
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sizeof (wlogsrv) / sizeof (*wlogsrv));
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sys_mbstowcs (wuser, winname (), sizeof (wuser) / sizeof (*wuser));
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if (!(ret = NetUserGetInfo (wlogsrv, wuser, 3,(LPBYTE *)&ui)))
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{
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sys_wcstombs (homepath_env_buf, ui->usri3_home_dir, MAX_PATH);
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if (!homepath_env_buf[0])
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{
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sys_wcstombs (homepath_env_buf, ui->usri3_home_dir_drive,
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MAX_PATH);
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if (homepath_env_buf[0])
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strcat (homepath_env_buf, "\\");
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else
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cygwin_conv_to_full_win32_path ("/", homepath_env_buf);
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}
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}
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}
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if (ui)
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NetApiBufferFree (ui);
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}
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if (homepath_env_buf[1] != ':')
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{
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newhomedrive = almost_null;
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newhomepath = homepath_env_buf;
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}
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else
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{
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homedrive_env_buf[0] = homepath_env_buf[0];
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homedrive_env_buf[1] = homepath_env_buf[1];
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homedrive_env_buf[2] = '\0';
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newhomedrive = homedrive_env_buf;
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newhomepath = homepath_env_buf + 2;
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}
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}
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if (newhomedrive && newhomedrive != homedrive)
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cfree_and_set (homedrive, (newhomedrive == almost_null)
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? almost_null : cstrdup (newhomedrive));
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if (newhomepath && newhomepath != homepath)
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cfree_and_set (homepath, cstrdup (newhomepath));
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switch (what)
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{
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case CH_HOMEDRIVE:
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return homedrive;
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case CH_HOMEPATH:
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return homepath;
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default:
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return homepath;
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}
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}
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const char *
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cygheap_user::test_uid (char *&what, const char *name, size_t namelen)
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{
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if (!what && !issetuid ())
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what = getwinenveq (name, namelen, HEAP_STR);
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return what;
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}
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const char *
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cygheap_user::env_logsrv (const char *name, size_t namelen)
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{
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if (test_uid (plogsrv, name, namelen))
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return plogsrv;
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const char *mydomain = domain ();
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const char *myname = winname ();
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if (!mydomain || strcasematch (myname, "SYSTEM"))
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return almost_null;
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char logsrv[INTERNET_MAX_HOST_NAME_LENGTH + 3];
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cfree_and_set (plogsrv, almost_null);
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if (get_logon_server (mydomain, logsrv, NULL))
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plogsrv = cstrdup (logsrv);
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return plogsrv;
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}
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const char *
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cygheap_user::env_domain (const char *name, size_t namelen)
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{
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if (pwinname && test_uid (pdomain, name, namelen))
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return pdomain;
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char username[UNLEN + 1];
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DWORD ulen = sizeof (username);
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char userdomain[DNLEN + 1];
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DWORD dlen = sizeof (userdomain);
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SID_NAME_USE use;
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cfree_and_set (pwinname, almost_null);
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cfree_and_set (pdomain, almost_null);
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if (!LookupAccountSid (NULL, sid (), username, &ulen,
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userdomain, &dlen, &use))
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__seterrno ();
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else
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{
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pwinname = cstrdup (username);
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pdomain = cstrdup (userdomain);
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}
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return pdomain;
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}
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const char *
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cygheap_user::env_userprofile (const char *name, size_t namelen)
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{
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if (test_uid (puserprof, name, namelen))
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return puserprof;
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char userprofile_env_buf[MAX_PATH + 1];
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cfree_and_set (puserprof, almost_null);
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/* FIXME: Should this just be setting a puserprofile like everything else? */
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const char *myname = winname ();
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if (myname && strcasematch (myname, "SYSTEM")
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&& get_registry_hive_path (sid (), userprofile_env_buf))
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puserprof = cstrdup (userprofile_env_buf);
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return puserprof;
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}
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const char *
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cygheap_user::env_homepath (const char *name, size_t namelen)
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{
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return ontherange (CH_HOMEPATH);
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}
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const char *
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cygheap_user::env_homedrive (const char *name, size_t namelen)
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{
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return ontherange (CH_HOMEDRIVE);
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}
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const char *
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cygheap_user::env_name (const char *name, size_t namelen)
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{
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if (!test_uid (pwinname, name, namelen))
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(void) domain ();
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return pwinname;
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}
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int NO_COPY etc::curr_ix = -1;
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bool NO_COPY etc::sawchange[MAX_ETC_FILES];
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const NO_COPY char *etc::fn[MAX_ETC_FILES];
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FILETIME NO_COPY etc::last_modified[MAX_ETC_FILES];
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int
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etc::init (int n, const char *etc_fn)
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{
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if (n >= 0)
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/* ok */;
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else if (++curr_ix < MAX_ETC_FILES)
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n = curr_ix;
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else
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api_fatal ("internal error");
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fn[n] = etc_fn;
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sawchange[n] = false;
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paranoid_printf ("curr_ix %d, n %d", curr_ix, n);
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return curr_ix;
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}
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bool
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etc::dir_changed (int n)
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{
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bool res = sawchange[n];
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if (!res)
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{
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static HANDLE NO_COPY changed_h;
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if (!changed_h)
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{
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path_conv pwd ("/etc");
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changed_h = FindFirstChangeNotification (pwd, FALSE,
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FILE_NOTIFY_CHANGE_LAST_WRITE);
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#ifdef DEBUGGING
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if (changed_h == INVALID_HANDLE_VALUE)
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system_printf ("Can't open /etc for checking, %E", (char *) pwd,
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changed_h);
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#endif
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}
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if (changed_h == INVALID_HANDLE_VALUE)
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res = true;
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else if (WaitForSingleObject (changed_h, 0) == WAIT_OBJECT_0)
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{
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(void) FindNextChangeNotification (changed_h);
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memset (sawchange, true, sizeof sawchange);
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res = true;
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}
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}
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paranoid_printf ("%s res %d", fn[n], res);
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return res;
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}
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bool
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etc::file_changed (int n)
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{
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bool res = false;
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if (!fn[n])
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res = true;
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else if (dir_changed (n))
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{
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HANDLE h;
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WIN32_FIND_DATA data;
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if ((h = FindFirstFile (fn[n], &data)) == INVALID_HANDLE_VALUE)
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res = true;
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else
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{
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FindClose (h);
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if (CompareFileTime (&data.ftLastWriteTime, last_modified + n) > 0)
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res = true;
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}
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}
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sawchange[n] = false;
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paranoid_printf ("%s res %d", fn[n], res);
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return res;
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}
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void
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etc::set_last_modified (int n, FILETIME& ft)
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{
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last_modified[n] = ft;
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sawchange[n] = false;
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}
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