274 lines
8.2 KiB
C++
274 lines
8.2 KiB
C++
/* uinfo.cc: user info (uid, gid, etc...)
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Copyright 1996, 1997, 1998 Cygnus Solutions.
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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 <pwd.h>
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#include "winsup.h"
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#include <utmp.h>
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#include <limits.h>
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#include <unistd.h>
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#include "autoload.h"
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#include <stdlib.h>
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#include <wchar.h>
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#include <lm.h>
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char *
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internal_getlogin (struct pinfo *pi)
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{
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if (! pi)
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api_fatal ("pinfo pointer is NULL!\n");
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DWORD username_len = MAX_USER_NAME;
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if (! GetUserName (pi->username, &username_len))
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strcpy (pi->username, "unknown");
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if (os_being_run == winNT)
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{
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LPWKSTA_USER_INFO_1 wui;
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char buf[256], *env;
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/* First trying to get logon info from environment */
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buf[0] = '\0';
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if ((env = getenv ("USERNAME")) != NULL)
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strcpy (buf, env);
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if ((env = getenv ("LOGONSERVER")) != NULL)
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strcpy (pi->logsrv, env + 2); /* filter leading double backslashes */
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if ((env = getenv ("USERDOMAIN")) != NULL)
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strcpy (pi->domain, env);
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/* Trust only if usernames are identical */
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if (!strcasecmp (pi->username, buf) && pi->domain[0] && pi->logsrv[0])
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debug_printf ("Domain: %s, Logon Server: %s", pi->domain, pi->logsrv);
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/* If that failed, try to get that info from NetBIOS */
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else if (!NetWkstaUserGetInfo (NULL, 1, (LPBYTE *)&wui))
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{
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wcstombs (pi->username, wui->wkui1_username,
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(wcslen (wui->wkui1_username) + 1) * sizeof (WCHAR));
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wcstombs (pi->logsrv, wui->wkui1_logon_server,
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(wcslen (wui->wkui1_logon_server) + 1) * sizeof (WCHAR));
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wcstombs (pi->domain, wui->wkui1_logon_domain,
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(wcslen (wui->wkui1_logon_domain) + 1) * sizeof (WCHAR));
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/* Save values in environment */
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if (strcasecmp (pi->username, "SYSTEM")
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&& pi->domain[0] && pi->logsrv[0])
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{
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LPUSER_INFO_3 ui = NULL;
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WCHAR wbuf[256];
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strcat (strcpy (buf, "\\\\"), pi->logsrv);
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setenv ("USERNAME", pi->username, 1);
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setenv ("LOGONSERVER", buf, 1);
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setenv ("USERDOMAIN", pi->domain, 1);
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/* HOMEDRIVE and HOMEPATH are wrong most of the time, too,
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after changing user context! */
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mbstowcs (wbuf, buf, 256);
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if (!NetUserGetInfo (NULL, wui->wkui1_username, 3, (LPBYTE *)&ui)
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|| !NetUserGetInfo (wbuf,wui->wkui1_username,3,(LPBYTE *)&ui))
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{
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wcstombs (buf, ui->usri3_home_dir, 256);
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if (!buf[0])
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{
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wcstombs (buf, ui->usri3_home_dir_drive, 256);
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if (buf[0])
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strcat (buf, "\\");
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}
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if (!buf[0])
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strcat (strcpy (buf, getenv ("SYSTEMDRIVE")), "\\");
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setenv ("HOMEPATH", buf + 2, 1);
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buf[2] = '\0';
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setenv ("HOMEDRIVE", buf, 1);
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NetApiBufferFree (ui);
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}
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}
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debug_printf ("Domain: %s, Logon Server: %s, Windows Username: %s",
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pi->domain, pi->logsrv, pi->username);
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NetApiBufferFree (wui);
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}
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if (allow_ntsec)
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{
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HANDLE ptok = INVALID_HANDLE_VALUE;
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DWORD siz;
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char tu[1024];
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int ret = 0;
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/* Try to get the SID from current process first */
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if (!OpenProcessToken (GetCurrentProcess (), TOKEN_QUERY, &ptok))
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debug_printf ("OpenProcessToken(): %E\n");
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else if (!GetTokenInformation (ptok, TokenUser, (LPVOID) &tu,
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sizeof tu, &siz))
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debug_printf ("GetTokenInformation(): %E");
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else if (!(ret = CopySid (40, (PSID) pi->sidbuf,
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((TOKEN_USER *) &tu)->User.Sid)))
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debug_printf ("Couldn't retrieve SID from access token!");
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if (ptok != INVALID_HANDLE_VALUE)
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CloseHandle (ptok);
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/* If that failes, try to get the SID from localhost. This can only
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be done if a domain is given because there's a chance that a local
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and a domain user may have the same name. */
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if (!ret && pi->domain[0])
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{
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/* Concat DOMAIN\USERNAME for the next lookup */
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strcat (strcat (strcpy (buf, pi->domain), "\\"), pi->username);
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if (!(ret = lookup_name (buf, NULL, (PSID) pi->sidbuf)))
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debug_printf ("Couldn't retrieve SID locally!");
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}
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/* If that failes, too, as a last resort try to get the SID from
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the logon server. */
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if (!ret && !(ret = lookup_name(pi->username, pi->logsrv,
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(PSID)pi->sidbuf)))
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debug_printf ("Couldn't retrieve SID from '%s'!", pi->logsrv);
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/* If we have a SID, try to get the corresponding Cygwin user name
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which can be different from the Windows user name. */
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if (ret)
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{
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struct passwd *pw;
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char psidbuf[40];
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PSID psid = (PSID) psidbuf;
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pi->psid = (PSID) pi->sidbuf;
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if (strcasecmp (pi->username, "SYSTEM")
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&& pi->domain[0] && pi->logsrv[0])
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{
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if (get_registry_hive_path (pi->psid, buf))
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setenv ("USERPROFILE", buf, 1);
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}
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while ((pw = getpwent ()) != NULL)
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if (get_pw_sid (psid, pw) && EqualSid (pi->psid, psid))
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{
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strcpy (pi->username, pw->pw_name);
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break;
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}
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endpwent ();
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}
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}
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}
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debug_printf ("Cygwins Username: %s", pi->username);
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return pi->username;
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}
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void
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uinfo_init ()
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{
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void read_etc_passwd ();
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extern int passwd_in_memory_p;
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void read_etc_group ();
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extern int group_in_memory_p;
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char *username;
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struct passwd *p;
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/* If psid is non null, the process is forked or spawned from
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another cygwin process without changing the user context.
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So all user infos in myself as well as the environment are
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(perhaps) valid. */
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if (myself->psid)
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{
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if (!passwd_in_memory_p)
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read_etc_passwd();
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if (!group_in_memory_p)
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read_etc_group ();
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}
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else if ((p = getpwnam (username = internal_getlogin (myself))) != NULL)
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{
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/* calling getpwnam assures us that /etc/password has been
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read in, but we can't be sure about /etc/group */
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if (!group_in_memory_p)
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read_etc_group ();
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myself->uid = p->pw_uid;
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myself->gid = p->pw_gid;
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}
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else
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{
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myself->uid = DEFAULT_UID;
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myself->gid = DEFAULT_GID;
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}
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/* Set to non impersonated value. */
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myself->token = INVALID_HANDLE_VALUE;
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myself->impersonated = TRUE;
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myself->orig_uid = myself->real_uid = myself->uid;
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myself->orig_gid = myself->real_gid = myself->gid;
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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 NO_COPY char this_username[MAX_USER_NAME];
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#endif
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return strcpy (this_username, myself->username);
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}
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extern "C" uid_t
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getuid (void)
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{
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return myself->real_uid;
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}
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extern "C" gid_t
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getgid (void)
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{
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return myself->real_gid;
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}
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extern "C" uid_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" gid_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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{
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strcpy (src, getlogin ());
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return src;
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}
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else
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{
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return getlogin ();
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}
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}
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extern "C" {
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LoadDLLinitfunc (netapi32)
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{
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HANDLE h;
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if ((h = LoadLibrary ("netapi32.dll")) != NULL)
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netapi32_handle = h;
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else if (! netapi32_handle)
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api_fatal ("could not load netapi32.dll. %d", GetLastError ());
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return 0;
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}
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static void dummy_autoload (void) __attribute__ ((unused));
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static void
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dummy_autoload (void)
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{
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LoadDLLinit (netapi32)
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LoadDLLfunc (NetWkstaUserGetInfo, 12, netapi32)
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LoadDLLfunc (NetUserGetInfo, 16, netapi32)
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LoadDLLfunc (NetApiBufferFree, 4, netapi32)
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}
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}
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