diff options
Diffstat (limited to 'winsup/cygwin/grp.cc')
-rw-r--r-- | winsup/cygwin/grp.cc | 435 |
1 files changed, 0 insertions, 435 deletions
diff --git a/winsup/cygwin/grp.cc b/winsup/cygwin/grp.cc deleted file mode 100644 index c185b26..0000000 --- a/winsup/cygwin/grp.cc +++ /dev/null @@ -1,435 +0,0 @@ -/* grp.cc - - Copyright 1996, 1997, 1998, 2000, 2001, 2002, 2003 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 "pinfo.h" -#include "security.h" -#include "path.h" -#include "fhandler.h" -#include "dtable.h" -#include "cygerrno.h" -#include "cygheap.h" -#include "pwdgrp.h" - -/* Position in the group cache */ -#define grp_pos _reent_winsup ()->_grp_pos - -static __group32 *group_buf; -static pwdgrp gr (group_buf); -static char * NO_COPY null_ptr; - -bool -pwdgrp::parse_group () -{ -# define grp (*group_buf)[curr_lines] - grp.gr_name = next_str (':'); - if (!*grp.gr_name) - return false; - - grp.gr_passwd = next_str (':'); - - if (!next_num (grp.gr_gid)) - return false; - - int n; - char *dp = raw_ptr (); - for (n = 0; *next_str (','); n++) - continue; - - grp.gr_mem = &null_ptr; - if (n) - { - char **namearray = (char **) calloc (n + 1, sizeof (char *)); - if (namearray) - { - for (int i = 0; i < n; i++, dp = strchr (dp, '\0') + 1) - namearray[i] = dp; - grp.gr_mem = namearray; - } - } - - return true; -# undef grp -} - -/* 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 */ -void -pwdgrp::read_group () -{ - for (int i = 0; i < gr.curr_lines; i++) - if ((*group_buf)[i].gr_mem != &null_ptr) - free ((*group_buf)[i].gr_mem); - - load ("/etc/group"); - - /* Complete /etc/group in memory if needed */ - if (!internal_getgrgid (myself->gid)) - { - static char linebuf [200]; - char group_name [UNLEN + 1] = "mkgroup"; - char strbuf[128] = ""; - - if (wincap.has_security ()) - { - struct __group32 *gr; - - cygheap->user.groups.pgsid.string (strbuf); - if ((gr = internal_getgrsid (cygheap->user.groups.pgsid))) - strlcpy (group_name, gr->gr_name, sizeof (group_name)); - } - if (myself->uid == UNKNOWN_UID) - strcpy (group_name, "mkpasswd"); /* Feedback... */ - snprintf (linebuf, sizeof (linebuf), "%s:%s:%lu:%s", - group_name, strbuf, myself->gid, cygheap->user.name ()); - debug_printf ("Completing /etc/group: %s", linebuf); - add_line (linebuf); - } - static char NO_COPY pretty_ls[] = "????????::-1:"; - if (wincap.has_security ()) - add_line (pretty_ls); - return; -} - -pwdgrp::pwdgrp (passwd *&pbuf) : - pwdgrp_buf_elem_size (sizeof (*pbuf)), passwd_buf (&pbuf) -{ - read = &pwdgrp::read_passwd; - parse = &pwdgrp::parse_passwd; - new_muto (pglock); -} - -pwdgrp::pwdgrp (__group32 *&gbuf) : - pwdgrp_buf_elem_size (sizeof (*gbuf)), group_buf (&gbuf) -{ - read = &pwdgrp::read_group; - parse = &pwdgrp::parse_group; - new_muto (pglock); -} - -struct __group32 * -internal_getgrsid (cygpsid &sid) -{ - char sid_string[128]; - - gr.refresh (false); - - if (sid.string (sid_string)) - for (int i = 0; i < gr.curr_lines; i++) - if (!strcmp (sid_string, group_buf[i].gr_passwd)) - return group_buf + i; - return NULL; -} - -struct __group32 * -internal_getgrgid (__gid32_t gid, bool check) -{ - gr.refresh (check); - - for (int i = 0; i < gr.curr_lines; i++) - if (group_buf[i].gr_gid == gid) - return group_buf + i; - return NULL; -} - -struct __group32 * -internal_getgrnam (const char *name, bool check) -{ - gr.refresh (check); - - for (int i = 0; i < gr.curr_lines; i++) - if (strcasematch (group_buf[i].gr_name, name)) - return group_buf + i; - - /* Didn't find requested group */ - return NULL; -} - -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) -{ - return internal_getgrgid (gid, true); -} - -extern "C" struct __group16 * -getgrgid (__gid16_t gid) -{ - static struct __group16 g16; /* FIXME: thread-safe? */ - - return grp32togrp16 (&g16, getgrgid32 (gid16togid32 (gid))); -} - -extern "C" struct __group32 * -getgrnam32 (const char *name) -{ - return internal_getgrnam (name, true); -} - -extern "C" struct __group16 * -getgrnam (const char *name) -{ - static struct __group16 g16; /* FIXME: thread-safe? */ - - return grp32togrp16 (&g16, getgrnam32 (name)); -} - -extern "C" void -endgrent () -{ - grp_pos = 0; -} - -extern "C" struct __group32 * -getgrent32 () -{ - if (grp_pos == 0) - gr.refresh (true); - if (grp_pos < gr.curr_lines) - return group_buf + grp_pos++; - - return NULL; -} - -extern "C" struct __group16 * -getgrent () -{ - static struct __group16 g16; /* FIXME: thread-safe? */ - - 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) -{ - gr.refresh (false); - - if (pos < gr.curr_lines) - return group_buf + pos; - return NULL; -} - -int -internal_getgroups (int gidsetsize, __gid32_t *grouplist, cygpsid * srchsid) -{ - HANDLE hToken = NULL; - DWORD size; - int cnt = 0; - struct __group32 *gr; - __gid32_t gid; - const char *username; - - if (allow_ntsec) - { - /* If impersonated, use impersonation token. */ - if (cygheap->user.issetuid ()) - hToken = cygheap->user.token (); - else if (!OpenProcessToken (hMainProc, TOKEN_QUERY, &hToken)) - hToken = NULL; - } - if (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; - - if (srchsid) - { - for (DWORD pg = 0; pg < groups->GroupCount; ++pg) - if ((cnt = (*srchsid == groups->Groups[pg].Sid))) - break; - } - else - 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) - { - if (!cygheap->user.issetuid ()) - CloseHandle (hToken); - goto error; - } - break; - } - } - } - else - debug_printf ("%d = GetTokenInformation(NULL) %E", size); - if (!cygheap->user.issetuid ()) - CloseHandle (hToken); - return cnt; - } - - gid = myself->gid; - username = cygheap->user.name (); - 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 internal_getgroups (gidsetsize, grouplist); -} - -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 = internal_getgroups (gidsetsize, grouplist32); - - 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 */ - if ((gr = internal_getgrgid (grouplist[gidx])) && - gsids.addfromgr (gr)) - goto found; - 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); -} |