diff options
Diffstat (limited to 'winsup/cygwin/grp.cc')
| -rw-r--r-- | winsup/cygwin/grp.cc | 508 |
1 files changed, 0 insertions, 508 deletions
diff --git a/winsup/cygwin/grp.cc b/winsup/cygwin/grp.cc deleted file mode 100644 index 7f81facdd..000000000 --- a/winsup/cygwin/grp.cc +++ /dev/null @@ -1,508 +0,0 @@ -/* grp.cc - - Copyright 1996, 1997, 1998, 2000, 2001, 2002 Red Hat, Inc. - - Original stubs by Jason Molenda of Cygnus Support, crash@cygnus.com - First implementation by Gunther Ebert, gunther.ebert@ixos-leipzig.de - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#include "winsup.h" -#include <grp.h> -#include <wininet.h> -#include <stdio.h> -#include <stdlib.h> -#include <errno.h> -#include "pinfo.h" -#include "security.h" -#include "fhandler.h" -#include "path.h" -#include "dtable.h" -#include "cygerrno.h" -#include "cygheap.h" -#include "pwdgrp.h" - -/* Read /etc/group only once for better performance. This is done - on the first call that needs information from it. */ - -static struct __group32 *group_buf; /* group contents in memory */ -static int curr_lines; -static int max_lines; - -/* Position in the group cache */ -#ifdef _MT_SAFE -#define grp_pos _reent_winsup ()->_grp_pos -#else -static int grp_pos = 0; -#endif - -static pwdgrp_check group_state; - -static int -parse_grp (struct __group32 &grp, char *line) -{ - int len = strlen (line); - if (line[--len] == '\r') - line[len] = '\0'; - - char *dp = strchr (line, ':'); - - if (!dp) - return 0; - - *dp++ = '\0'; - grp.gr_name = line; - - grp.gr_passwd = dp; - dp = strchr (grp.gr_passwd, ':'); - if (dp) - { - *dp++ = '\0'; - if (!strlen (grp.gr_passwd)) - grp.gr_passwd = NULL; - - grp.gr_gid = strtol (dp, NULL, 10); - dp = strchr (dp, ':'); - if (dp) - { - if (*++dp) - { - int i = 0; - char *cp; - - for (cp = dp; (cp = strchr (cp, ',')) != NULL; ++cp) - ++i; - char **namearray = (char **) calloc (i + 2, sizeof (char *)); - if (namearray) - { - i = 0; - for (cp = dp; (cp = strchr (dp, ',')) != NULL; dp = cp + 1) - { - *cp = '\0'; - namearray[i++] = dp; - } - namearray[i++] = dp; - namearray[i] = NULL; - } - grp.gr_mem = namearray; - } - else - grp.gr_mem = (char **) calloc (1, sizeof (char *)); - return 1; - } - } - return 0; -} - -/* Read one line from /etc/group into the group cache */ -static void -add_grp_line (char *line) -{ - if (curr_lines == max_lines) - { - max_lines += 10; - group_buf = (struct __group32 *) realloc (group_buf, max_lines * sizeof (struct __group32)); - } - if (parse_grp (group_buf[curr_lines], line)) - curr_lines++; -} - -class group_lock -{ - bool armed; - static NO_COPY pthread_mutex_t mutex; - public: - group_lock (bool doit) - { - if (armed = doit) - pthread_mutex_lock (&mutex); - } - ~group_lock () - { - if (armed) - pthread_mutex_unlock (&mutex); - } -}; - -pthread_mutex_t NO_COPY group_lock::mutex = (pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER; - -/* Cygwin internal */ -/* Read in /etc/group and save contents in the group cache */ -/* This sets group_in_memory_p to 1 so functions in this file can - tell that /etc/group has been read in */ -/* FIXME: should be static but this is called in uinfo_init outside this - file */ -void -read_etc_group () -{ - static pwdgrp_read gr; - - group_lock here (cygwin_finished_initializing); - - /* if we got blocked by the mutex, then etc_group may have been processed */ - if (group_state != uninitialized) - return; - - if (group_state != initializing) - { - group_state = initializing; - if (gr.open ("/etc/group")) - { - char *line; - while ((line = gr.gets ()) != NULL) - if (strlen (line)) - add_grp_line (line); - - group_state.set_last_modified (gr.get_fhandle (), gr.get_fname ()); - group_state = loaded; - gr.close (); - debug_printf ("Read /etc/group, %d lines", curr_lines); - } - else /* /etc/group doesn't exist -- create default one in memory */ - { - char group_name [UNLEN + 1]; - DWORD group_name_len = UNLEN + 1; - char domain_name [INTERNET_MAX_HOST_NAME_LENGTH + 1]; - DWORD domain_name_len = INTERNET_MAX_HOST_NAME_LENGTH + 1; - SID_NAME_USE acType; - static char linebuf [200]; - - if (wincap.has_security ()) - { - HANDLE ptok; - cygsid tg; - DWORD siz; - - if (OpenProcessToken (hMainProc, TOKEN_QUERY, &ptok)) - { - if (GetTokenInformation (ptok, TokenPrimaryGroup, &tg, - sizeof tg, &siz) - && LookupAccountSidA (NULL, tg, group_name, - &group_name_len, domain_name, - &domain_name_len, &acType)) - { - char strbuf[100]; - snprintf (linebuf, sizeof (linebuf), "%s:%s:%lu:", - group_name, - tg.string (strbuf), - *GetSidSubAuthority (tg, - *GetSidSubAuthorityCount (tg) - 1)); - debug_printf ("Emulating /etc/group: %s", linebuf); - add_grp_line (linebuf); - group_state = emulated; - } - CloseHandle (ptok); - } - } - if (group_state != emulated) - { - strncpy (group_name, "Administrators", sizeof (group_name)); - if (!LookupAccountSidA (NULL, well_known_admins_sid, group_name, - &group_name_len, domain_name, - &domain_name_len, &acType)) - { - strcpy (group_name, "unknown"); - debug_printf ("Failed to get local admins group name. %E"); - } - snprintf (linebuf, sizeof (linebuf), "%s::%u:", group_name, - (unsigned) DEFAULT_GID); - debug_printf ("Emulating /etc/group: %s", linebuf); - add_grp_line (linebuf); - group_state = emulated; - } - } - } - - return; -} - -static -struct __group16 * -grp32togrp16 (struct __group16 *gp16, struct __group32 *gp32) -{ - if (!gp16 || !gp32) - return NULL; - - /* Copying the pointers is actually unnecessary. Just having the correct - return type is important. */ - gp16->gr_name = gp32->gr_name; - gp16->gr_passwd = gp32->gr_passwd; - gp16->gr_gid = (__gid16_t) gp32->gr_gid; /* Not loss-free */ - gp16->gr_mem = gp32->gr_mem; - - return gp16; -} - -extern "C" struct __group32 * -getgrgid32 (__gid32_t gid) -{ - struct __group32 * default_grp = NULL; - if (group_state <= initializing) - read_etc_group (); - - for (int i = 0; i < curr_lines; i++) - { - if (group_buf[i].gr_gid == DEFAULT_GID) - default_grp = group_buf + i; - if (group_buf[i].gr_gid == gid) - return group_buf + i; - } - - return allow_ntsec ? NULL : default_grp; -} - -extern "C" struct __group16 * -getgrgid (__gid16_t gid) -{ - static struct __group16 g16; - - return grp32togrp16 (&g16, getgrgid32 ((__gid32_t) gid)); -} - -extern "C" struct __group32 * -getgrnam32 (const char *name) -{ - if (group_state <= initializing) - read_etc_group (); - - for (int i = 0; i < curr_lines; i++) - if (strcasematch (group_buf[i].gr_name, name)) - return group_buf + i; - - /* Didn't find requested group */ - return NULL; -} - -extern "C" struct __group16 * -getgrnam (const char *name) -{ - static struct __group16 g16; - - return grp32togrp16 (&g16, getgrnam32 (name)); -} - -extern "C" void -endgrent () -{ - grp_pos = 0; -} - -extern "C" struct __group32 * -getgrent32 () -{ - if (group_state <= initializing) - read_etc_group (); - - if (grp_pos < curr_lines) - return group_buf + grp_pos++; - - return NULL; -} - -extern "C" struct __group16 * -getgrent () -{ - static struct __group16 g16; - - return grp32togrp16 (&g16, getgrent32 ()); -} - -extern "C" void -setgrent () -{ - grp_pos = 0; -} - -/* Internal function. ONLY USE THIS INTERNALLY, NEVER `getgrent'!!! */ -struct __group32 * -internal_getgrent (int pos) -{ - if (group_state <= initializing) - read_etc_group (); - - if (pos < curr_lines) - return group_buf + pos; - return NULL; -} - -int -getgroups32 (int gidsetsize, __gid32_t *grouplist, __gid32_t gid, - const char *username) -{ - HANDLE hToken = NULL; - DWORD size; - int cnt = 0; - struct __group32 *gr; - - if (group_state <= initializing) - read_etc_group (); - - if (allow_ntsec && - OpenProcessToken (hMainProc, TOKEN_QUERY, &hToken)) - { - if (GetTokenInformation (hToken, TokenGroups, NULL, 0, &size) - || GetLastError () == ERROR_INSUFFICIENT_BUFFER) - { - char buf[size]; - TOKEN_GROUPS *groups = (TOKEN_GROUPS *) buf; - - if (GetTokenInformation (hToken, TokenGroups, buf, size, &size)) - { - cygsid sid; - - for (int gidx = 0; (gr = internal_getgrent (gidx)); ++gidx) - if (sid.getfromgr (gr)) - for (DWORD pg = 0; pg < groups->GroupCount; ++pg) - if (sid == groups->Groups[pg].Sid && - sid != well_known_world_sid) - { - if (cnt < gidsetsize) - grouplist[cnt] = gr->gr_gid; - ++cnt; - if (gidsetsize && cnt > gidsetsize) - { - CloseHandle (hToken); - goto error; - } - break; - } - } - } - else - debug_printf ("%d = GetTokenInformation(NULL) %E", size); - CloseHandle (hToken); - if (cnt) - return cnt; - } - - for (int gidx = 0; (gr = internal_getgrent (gidx)); ++gidx) - if (gid == gr->gr_gid) - { - if (cnt < gidsetsize) - grouplist[cnt] = gr->gr_gid; - ++cnt; - if (gidsetsize && cnt > gidsetsize) - goto error; - } - else if (gr->gr_mem) - for (int gi = 0; gr->gr_mem[gi]; ++gi) - if (strcasematch (username, gr->gr_mem[gi])) - { - if (cnt < gidsetsize) - grouplist[cnt] = gr->gr_gid; - ++cnt; - if (gidsetsize && cnt > gidsetsize) - goto error; - } - return cnt; - -error: - set_errno (EINVAL); - return -1; -} - -extern "C" int -getgroups32 (int gidsetsize, __gid32_t *grouplist) -{ - return getgroups32 (gidsetsize, grouplist, myself->gid, - cygheap->user.name ()); -} - -extern "C" int -getgroups (int gidsetsize, __gid16_t *grouplist) -{ - __gid32_t *grouplist32 = NULL; - - if (gidsetsize < 0) - { - set_errno (EINVAL); - return -1; - } - if (gidsetsize > 0 && grouplist) - grouplist32 = (__gid32_t *) alloca (gidsetsize * sizeof (__gid32_t)); - - int ret = getgroups32 (gidsetsize, grouplist32, myself->gid, - cygheap->user.name ()); - - if (gidsetsize > 0 && grouplist) - for (int i = 0; i < ret; ++ i) - grouplist[i] = grouplist32[i]; - - return ret; -} - -extern "C" int -initgroups32 (const char *, __gid32_t) -{ - if (wincap.has_security ()) - cygheap->user.groups.clear_supp (); - return 0; -} - -extern "C" int -initgroups (const char * name, __gid16_t gid) -{ - return initgroups32 (name, gid16togid32(gid)); -} - -/* setgroups32: standards? */ -extern "C" int -setgroups32 (int ngroups, const __gid32_t *grouplist) -{ - if (ngroups < 0 || (ngroups > 0 && !grouplist)) - { - set_errno (EINVAL); - return -1; - } - - if (!wincap.has_security ()) - return 0; - - cygsidlist gsids (cygsidlist_alloc, ngroups); - struct __group32 *gr; - - if (ngroups && !gsids.sids) - return -1; - - for (int gidx = 0; gidx < ngroups; ++gidx) - { - for (int gidy = 0; gidy < gidx; gidy++) - if (grouplist[gidy] == grouplist[gidx]) - goto found; /* Duplicate */ - for (int gidy = 0; (gr = internal_getgrent (gidy)); ++gidy) - if (gr->gr_gid == (__gid32_t) grouplist[gidx]) - { - if (gsids.addfromgr (gr)) - goto found; - break; - } - debug_printf ("No sid found for gid %d", grouplist[gidx]); - gsids.free_sids (); - set_errno (EINVAL); - return -1; - found: - continue; - } - cygheap->user.groups.update_supp (gsids); - return 0; -} - -extern "C" int -setgroups (int ngroups, const __gid16_t *grouplist) -{ - __gid32_t *grouplist32 = NULL; - - if (ngroups > 0 && grouplist) - { - grouplist32 = (__gid32_t *) alloca (ngroups * sizeof (__gid32_t)); - if (grouplist32 == NULL) - return -1; - for (int i = 0; i < ngroups; i++) - grouplist32[i] = grouplist[i]; - } - return setgroups32 (ngroups, grouplist32); -} |