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idmapper prototype rework 2023-11-27
Posted by Anonymous on Mon 27th Nov 2023 19:07
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diff --git a/build.vc19/nfsd/nfsd.vcxproj b/build.vc19/nfsd/nfsd.vcxproj index 047f02d..77df470 100644 --- a/build.vc19/nfsd/nfsd.vcxproj +++ b/build.vc19/nfsd/nfsd.vcxproj @@ -153,11 +153,13 @@ <ClCompile Include="..\..\daemon\acl.c" /> <ClCompile Include="..\..\daemon\callback_server.c" /> <ClCompile Include="..\..\daemon\callback_xdr.c" /> + <ClCompile Include="..\..\daemon\cpvparser1.c" /> <ClCompile Include="..\..\daemon\daemon_debug.c" /> <ClCompile Include="..\..\daemon\delegation.c" /> <ClCompile Include="..\..\daemon\ea.c" /> <ClCompile Include="..\..\daemon\getattr.c" /> <ClCompile Include="..\..\daemon\idmap.c" /> + <ClCompile Include="..\..\daemon\idmap_cygwin.c" /> <ClCompile Include="..\..\daemon\lock.c" /> <ClCompile Include="..\..\daemon\lookup.c" /> <ClCompile Include="..\..\daemon\mount.c" /> @@ -188,6 +190,7 @@ <ClCompile Include="..\..\daemon\volume.c" /> </ItemGroup> <ItemGroup> + <ClInclude Include="..\..\daemon\cpvparser1.h" /> <ClInclude Include="..\..\daemon\daemon_debug.h" /> <ClInclude Include="..\..\daemon\delegation.h" /> <ClInclude Include="..\..\daemon\from_kernel.h" /> diff --git a/build.vc19/nfsd/nfsd.vcxproj.filters b/build.vc19/nfsd/nfsd.vcxproj.filters index d0ebad9..cc1ee27 100644 --- a/build.vc19/nfsd/nfsd.vcxproj.filters +++ b/build.vc19/nfsd/nfsd.vcxproj.filters @@ -24,6 +24,9 @@ <ClCompile Include="..\..\daemon\callback_xdr.c"> <Filter>Source Files</Filter> </ClCompile> + <ClCompile Include="..\..\daemon\cpvparser1.c"> + <Filter>Source Files</Filter> + </ClCompile> <ClCompile Include="..\..\daemon\daemon_debug.c"> <Filter>Source Files</Filter> </ClCompile> @@ -39,6 +42,9 @@ <ClCompile Include="..\..\daemon\idmap.c"> <Filter>Source Files</Filter> </ClCompile> + <ClCompile Include="..\..\daemon\idmap_cygwin.c"> + <Filter>Source Files</Filter> + </ClCompile> <ClCompile Include="..\..\daemon\lock.c"> <Filter>Source Files</Filter> </ClCompile> @@ -125,6 +131,9 @@ </ClCompile> </ItemGroup> <ItemGroup> + <ClInclude Include="..\..\daemon\cpvparser1.h"> + <Filter>Header Files</Filter> + </ClInclude> <ClInclude Include="..\..\daemon\daemon_debug.h"> <Filter>Header Files</Filter> </ClInclude> diff --git a/cygwin_idmapper.ksh b/cygwin_idmapper.ksh new file mode 100644 index 0000000..4b96ecf --- /dev/null +++ b/cygwin_idmapper.ksh @@ -0,0 +1,124 @@ +#!/bin/ksh93 + +set -o nounset +typeset IFS='' + +# +# global variables +# (stored in compound variable so we +# can do a $ print -u2 -v c # for debugging) +# +compound c=( + mode="$1" + name="$2" +) + +compound -A localusers=( + ["roland_mainz"]=( + localaccoutname='roland_mainz' + localuid=197608 + localgid=197121 + ) + ["siegfried_wulsch"]=( + localaccoutname='siegfried_wulsch' + localuid=197609 + localgid=197121 + ) + ["SYSTEM"]=( + localaccoutname='SYSTEM' + localuid=18 + localgid=18 + ) + ["rmainz"]=( + localaccoutname='rmainz' + localuid=1616 + localgid=1616 + ) + ["swulsch"]=( + localaccoutname='swulsch' + localuid=1818 + localgid=1818 + ) + ["root"]=( + localaccoutname='root' + localuid=0 + localgid=0 + ) + ["nobody"]=( + localaccoutname='nobody' + localuid=65534 + localgid=65534 + ) +) + +compound -A localgroups=( + ["Kein"]=( + localaccoutname='Kein' + localgid=197121 + ) + ["rmainz"]=( + localaccoutname='rmainz' + localuid=1616 + localgid=1616 + ) + ["swulsch"]=( + localaccoutname='swulsch' + localuid=1818 + localgid=1818 + ) + ["root"]=( + localaccoutname='root' + localuid=0 + localgid=0 + ) + ["nogroup"]=( + localaccoutname='nogroup' + localuid=65534 + localgid=65534 + ) +) + +case "${c.mode}" in + 'nfsserveruser2localaccount') + if [[ "${c.name}" == ~(Elr)[[:digit:]]+ ]] ; then + for s in "${!localusers[@]}" ; do + if (( localusers[$s].localuid == c.name )) ; then + print -v localusers[$s] + exit 0 + fi + done + fi + + if [[ -v localusers["${c.name}"] ]] ; then + print -v localusers["${c.name}"] + exit 0 + else + print -u2 -f "cygwin_idmapper.ksh: Account '%s' not found.\n" "${c.name}" + exit 1 + fi + ;; + 'nfsserveruser2localgroup') + if [[ "${c.name}" == ~(Elr)[[:digit:]]+ ]] ; then + for s in "${!localgroups[@]}" ; do + if (( localgroups[$s].localgid == c.name )) ; then + print -v localgroups[$s] + exit 0 + fi + done + fi + + if [[ -v localgroups["${c.name}"] ]] ; then + print -v localgroups["${c.name}"] + exit 0 + else + print -u2 -f "cygwin_idmapper.ksh: Account '%s' not found.\n" "${c.name}" + exit 1 + fi + ;; + *) + print -u2 "cygwin_idmapper.ksh: Unknown mode" + exit 1 + ;; +esac + +# EOF. diff --git a/daemon/acl.c b/daemon/acl.c index 1d1eac4..86e0d5a 100644 --- a/daemon/acl.c +++ b/daemon/acl.c @@ -21,6 +21,7 @@ #include <Windows.h> #include <stdio.h> +#include <time.h> #include <strsafe.h> #include <sddl.h> @@ -198,10 +199,138 @@ BOOL allocate_unixgroup_sid(unsigned long gid, PSID *pSid) } #endif /* NFS41_DRIVER_FEATURE_MAP_UNMAPPED_USER_TO_UNIXUSER_SID */ -static int map_name_2_sid(nfs41_daemon_globals *nfs41dg, int query, DWORD *sid_len, PSID *sid, LPCSTR name) + +/* fixme: should be in sys/nfs41_build_features.h */ +#define USE_SID_CACHE 1 + + +#ifdef USE_SID_CACHE +#define SID_CACHE_SIZE 20 +#define SID_CACHE_TTL 600 + +typedef struct _sid_cache_entry +{ + char name[256]; /* fixme: size correct ? */ + PSID sid; + DWORD sid_len; + time_t timestamp; +} sid_cache_entry; + +typedef struct _sid_cache +{ + CRITICAL_SECTION lock; + sid_cache_entry entries[SID_CACHE_SIZE]; + ssize_t cacheIndex; +} sid_cache; + +/* fixme: need function to deallocate this */ +sid_cache user_sid_cache = { 0 }; + +static volatile int cache_once = 0; + +/* copy SID |value| into cache */ +void sid_addcache(sid_cache *cache, const char* name, PSID *value) +{ + int i; + int oldestEntryIndex; + time_t currentTimestamp; + + /* fixme: this is not really threadsafe!! */ + if (cache_once++ == 0) { + InitializeCriticalSection(&cache->lock); + dprintf(0, "SID cache init\n"); + } + + EnterCriticalSection(&cache->lock); + currentTimestamp = time(NULL); + + /* Find the oldest valid cache entry */ + oldestEntryIndex = -1; + for (i = 0; i < SID_CACHE_SIZE; i++) { + if ((cache->entries[i].sid == NULL) || (cache->entries[i].timestamp < (currentTimestamp - SID_CACHE_TTL))) { + oldestEntryIndex = i; + break; + } + } + + /* If no valid entry was found, overwrite the oldest entry */ + if (oldestEntryIndex == -1) { + oldestEntryIndex = cache->cacheIndex; + } + + /* Replace the cache entry */ + DWORD sid_len = GetLengthSid(value); + PSID malloced_sid = malloc(sid_len); + if (!malloced_sid) + goto done; + if (!CopySid(sid_len, malloced_sid, value)) { + free(malloced_sid); + goto done; + } + + sid_cache_entry *e = &cache->entries[oldestEntryIndex]; + + e->sid_len = sid_len; + if (e->sid) + free(e->sid); + e->sid = malloced_sid; + (void)strcpy(e->name, name); + e->timestamp = currentTimestamp; + + cache->cacheIndex = (cache->cacheIndex + 1) % SID_CACHE_SIZE; + +done: + LeaveCriticalSection(&cache->lock); +} + +/* return |malloc()|'ed copy of SID from cache entry */ +PSID *sid_getfromcache(sid_cache *cache, const char *name) { + int i; + time_t currentTimestamp; + PSID *ret_sid = NULL; + + /* fixme: this is not really threadsafe!! */ + if (cache_once++ == 0) { + InitializeCriticalSection(&cache->lock); + dprintf(0, "SID cache init\n"); + } + + EnterCriticalSection(&cache->lock); + currentTimestamp = time(NULL); + + for (i = 0; i < SID_CACHE_SIZE; i++) { + sid_cache_entry *e = &cache->entries[i]; + + if ((!strcmp(e->name, name)) && (e->timestamp >= (currentTimestamp - SID_CACHE_TTL))) { + PSID malloced_sid = malloc(e->sid_len); + + if (!malloced_sid) + goto done; + + if (!CopySid(e->sid_len, malloced_sid, e->sid)) { + free(malloced_sid); + goto done; + } + + ret_sid = malloced_sid; + goto done; + } + } + +done: + LeaveCriticalSection(&cache->lock); + return ret_sid; +} +#endif + +static int map_nfs4servername_2_sid(nfs41_daemon_globals *nfs41dg, int query, DWORD *sid_len, PSID *sid, LPCSTR name) +{ + const char *orig_name = name; + int status = ERROR_INTERNAL_ERROR; SID_NAME_USE sid_type; + char name_buff[256+2]; LPSTR tmp_buf = NULL; DWORD tmp = 0; #ifdef NFS41_DRIVER_FEATURE_MAP_UNMAPPED_USER_TO_UNIXUSER_SID @@ -210,24 +339,38 @@ static int map_name_2_sid(nfs41_daemon_globals *nfs41dg, int query, DWORD *sid_l #endif /* NFS41_DRIVER_FEATURE_MAP_UNMAPPED_USER_TO_UNIXUSER_SID */ #ifdef NFS41_DRIVER_FEATURE_MAP_UNMAPPED_USER_TO_UNIXUSER_SID + /* use our own idmapper script to map nfsv4 owner string to local Windows account */ if (query & OWNER_SECURITY_INFORMATION) { - if (!strcmp(name, "rmainz")) { - name = "roland_mainz"; - dprintf(ACLLVL, "map_name_2_sid: remap rmainz --> roland_mainz\n"); - } - else if (!strcmp(name, "197608")) { - name = "roland_mainz"; - dprintf(ACLLVL, "map_name_2_sid: remap 197608 --> roland_mainz\n"); + uid_t udummy = -1; + gid_t gdummy = -1; + +int cygwin_getent_passwd(const char *name, char *res_loginname, uid_t *res_uid, gid_t *res_gid); + +#ifdef USE_SID_CACHE + if (*sid = sid_getfromcache(&user_sid_cache, name)) { + *sid_len = GetLengthSid(*sid); +// dprintf(0, "map_nfs4servername_2_sid: returning cached sid for '%s'\n", name); + return 0; + } +#endif /* USE_SID_CACHE */ + +#ifndef USE_SID_CACHE + /* gisburn: fixme: We must cache this, or the performance impact will be devastating!! */ +#endif /* !USE_SID_CACHE */ + if (!cygwin_getent_passwd(name, name_buff, &udummy, &gdummy)) { + if (strcmp(name, name_buff)) { + dprintf(0, + "map_nfs4servername_2_sid: remap '%s' --> '%s'\n", + name, + name_buff); + name = name_buff; } - else if (!strcmp(name, "1616")) { - name = "roland_mainz"; - dprintf(ACLLVL, "map_name_2_sid: remap 1616 --> roland_mainz\n"); } } #endif /* NFS41_DRIVER_FEATURE_MAP_UNMAPPED_USER_TO_UNIXUSER_SID */ status = LookupAccountName(NULL, name, NULL, sid_len, NULL, &tmp, &sid_type); - dprintf(ACLLVL, "map_name_2_sid(query=%x,name='%s'): LookupAccountName returned %d " + dprintf(ACLLVL, "map_nfs4servername_2_sid(query=%x,name='%s'): LookupAccountName returned %d " "GetLastError %d name len %d domain len %d\n", query, name, status, GetLastError(), *sid_len, tmp); if (status) @@ -248,7 +391,7 @@ static int map_name_2_sid(nfs41_daemon_globals *nfs41dg, int query, DWORD *sid_l &tmp, &sid_type); free(tmp_buf); if (!status) { - eprintf("map_name_2_sid(query=%x,name='%s'): LookupAccountName failed " + eprintf("map_nfs4servername_2_sid(query=%x,name='%s'): LookupAccountName failed " "with %d\n", query, name, GetLastError()); goto out_free_sid; } else { @@ -256,13 +399,13 @@ static int map_name_2_sid(nfs41_daemon_globals *nfs41dg, int query, DWORD *sid_l LPSTR ssid = NULL; if (IsValidSid(*sid)) if (ConvertSidToStringSidA(*sid, &ssid)) - dprintf(1, "map_name_2_sid: sid_type = %d SID %s\n", + dprintf(1, "map_nfs4servername_2_sid: sid_type = %d SID %s\n", sid_type, ssid); else - dprintf(1, "map_name_2_sid: ConvertSidToStringSidA failed " + dprintf(1, "map_nfs4servername_2_sid: ConvertSidToStringSidA failed " "with %d\n", GetLastError()); else - dprintf(1, "map_name_2_sid: Invalid Sid ?\n"); + dprintf(1, "map_nfs4servername_2_sid: Invalid Sid ?\n"); if (ssid) LocalFree(ssid); #endif } @@ -270,7 +413,7 @@ static int map_name_2_sid(nfs41_daemon_globals *nfs41dg, int query, DWORD *sid_l break; case ERROR_NONE_MAPPED: #ifdef NFS41_DRIVER_FEATURE_MAP_UNMAPPED_USER_TO_UNIXUSER_SID - dprintf(1, "map_name_2_sid(query=%x,name='%s'): none mapped, " + dprintf(1, "map_nfs4servername_2_sid(query=%x,name='%s'): none mapped, " "trying Unix_User+/Unix_Group+ mapping\n", query, name); @@ -286,7 +429,7 @@ static int map_name_2_sid(nfs41_daemon_globals *nfs41dg, int query, DWORD *sid_l user_uid = map_uid; } else { - dprintf(1, "map_name_2_sid(query=%x,name='%s'): nfs41_idmap_name_to_ids() failed\n", + dprintf(1, "map_nfs4servername_2_sid(query=%x,name='%s'): nfs41_idmap_name_to_ids() failed\n", query, name); /* fixme: try harder here, "1234" should to to |atol()| */ } @@ -302,7 +445,7 @@ static int map_name_2_sid(nfs41_daemon_globals *nfs41dg, int query, DWORD *sid_l group_gid = map_gid; } else { - dprintf(1, "map_name_2_sid(query=%x,name='%s'): nfs41_idmap_group_to_gid() failed\n", + dprintf(1, "map_nfs4servername_2_sid(query=%x,name='%s'): nfs41_idmap_group_to_gid() failed\n", query, name); /* fixme: try harder here, "1234" should to to |atol()| */ } @@ -310,14 +453,15 @@ static int map_name_2_sid(nfs41_daemon_globals *nfs41dg, int query, DWORD *sid_l if (user_uid != -1) { if (allocate_unixuser_sid(user_uid, sid)) { - dprintf(ACLLVL, "map_name_2_sid(query=%x,name='%s'): " + dprintf(ACLLVL, "map_nfs4servername_2_sid(query=%x,name='%s'): " "allocate_unixuser_sid(uid=%ld) success\n", query, name, user_uid); - return ERROR_SUCCESS; + status = ERROR_SUCCESS; + goto out; } status = GetLastError(); - dprintf(ACLLVL, "map_name_2_sid(query=%x,name='%s'): " + dprintf(ACLLVL, "map_nfs4servername_2_sid(query=%x,name='%s'): " "allocate_unixuser_sid(uid=%ld) failed, error=%d\n", query, name, user_uid, status); return status; @@ -325,21 +469,22 @@ static int map_name_2_sid(nfs41_daemon_globals *nfs41dg, int query, DWORD *sid_l if (group_gid != -1) { if (allocate_unixgroup_sid(group_gid, sid)) { - dprintf(ACLLVL, "map_name_2_sid(query=%x,name='%s'): " + dprintf(ACLLVL, "map_nfs4servername_2_sid(query=%x,name='%s'): " "allocate_unixgroup_sid(gid=%ld) success\n", query, name, group_gid); - return ERROR_SUCCESS; + status = ERROR_SUCCESS; + goto out; } status = GetLastError(); - dprintf(ACLLVL, "map_name_2_sid(query=%x,name='%s'): " + dprintf(ACLLVL, "map_nfs4servername_2_sid(query=%x,name='%s'): " "allocate_unixgroup_sid(gid=%ld) failed, error=%d\n", query, name, group_gid, status); return status; } #endif /* NFS41_DRIVER_FEATURE_MAP_UNMAPPED_USER_TO_UNIXUSER_SID */ - dprintf(1, "map_name_2_sid(query=%x,name='%s'): none mapped, " + dprintf(1, "map_nfs4servername_2_sid(query=%x,name='%s'): none mapped, " "using WinNullSid mapping\n", query, name); @@ -348,11 +493,20 @@ static int map_name_2_sid(nfs41_daemon_globals *nfs41dg, int query, DWORD *sid_l goto out_free_sid; break; default: - dprintf(1, "map_name_2_sid(query=%x,name='%s'): error %d not handled\n", + dprintf(1, "map_nfs4servername_2_sid(query=%x,name='%s'): error %d not handled\n", query, name, GetLastError()); break; } out: +#ifdef USE_SID_CACHE + if (*sid) { + /* fixme: No other flags in |query| must be set!! */ + if (query & OWNER_SECURITY_INFORMATION) { + sid_addcache(&user_sid_cache, orig_name, *sid); + } + } +#endif /* USE_SID_CACHE */ + return status; out_free_sid: status = GetLastError(); @@ -417,7 +571,7 @@ static int convert_nfs4acl_2_dacl(nfs41_daemon_globals *nfs41dg, goto out; } if (!flag) { - status = map_name_2_sid(nfs41dg, + status = map_nfs4servername_2_sid(nfs41dg, 0xFFFF /* fixme: Unknown whether user or group */, &sid_len, &sids[i], acl->aces[i].who); if (status) { @@ -534,7 +688,7 @@ static int handle_getacl(void *daemon_context, nfs41_upcall *upcall) dprintf(ACLLVL, "handle_getacl: OWNER_SECURITY_INFORMATION: for user=%s " "domain=%s\n", info.owner, domain?domain:"<null>"); sid_len = 0; - status = map_name_2_sid(nfs41dg, + status = map_nfs4servername_2_sid(nfs41dg, OWNER_SECURITY_INFORMATION, &sid_len, &osid, info.owner); if (status) goto out; @@ -552,7 +706,7 @@ static int handle_getacl(void *daemon_context, nfs41_upcall *upcall) dprintf(ACLLVL, "handle_getacl: GROUP_SECURITY_INFORMATION: for %s " "domain=%s\n", info.owner_group, domain?domain:"<null>"); sid_len = 0; - status = map_name_2_sid(nfs41dg, + status = map_nfs4servername_2_sid(nfs41dg, GROUP_SECURITY_INFORMATION, &sid_len, &gsid, info.owner_group); if (status) goto out; diff --git a/daemon/cpvparser1.c b/daemon/cpvparser1.c new file mode 100644 index 0000000..285fc76 --- /dev/null +++ b/daemon/cpvparser1.c @@ -0,0 +1,361 @@ + +/* + * MIT License + * + * Copyright (c) 2023 Roland Mainz <roland.mainz@nrubsig.org> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FORalloca ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * cpvparser1.c - simple ksh93 compound variable parsing + * + * It basically reads the output of $ print -v ... # like this: + * ---- snip ---- + * $ ksh93 -c 'compound c=( va=1 vb=hello ) ; print -v c' + * ( + * va=1 + * vb=hello + * ) + * ---- snip ---- + * + * ToDo: + * - arrays (indexed, sparse indexed and associative) + * - multibyte characters + * + * Written by Roland Mainz <roland.mainz@nrubsig.org> + */ + +#include <stdlib.h> +#include <stdbool.h> +#include <string.h> +#include <stdio.h> +#include <ctype.h> + +#include "cpvparser1.h" + +#ifdef _WIN32 +#define strdup(s) _strdup(s) +#endif + +/* private data! */ +typedef struct cpv_parse_context { + const char *start_string; + const char *curr_string; + size_t max_name_val_size; + unsigned long flags; +} cpv_parse_context; + + +void *cpv_create_parser(const char *s, unsigned long flags, ...) +{ + cpv_parse_context *cpc; + + cpc = calloc(1, sizeof(cpv_parse_context)); + if (!cpc) + goto fail; + + cpc->start_string = strdup(s); + if (!cpc->start_string) + goto fail; + + cpc->curr_string = cpc->start_string; + cpc->max_name_val_size = strlen(cpc->start_string); + cpc->flags = flags; + + return (cpc); + +fail: + if (cpc) { + free((void *)cpc->start_string); + free(cpc); + } + + return NULL; +} + +void cpv_free_parser(void *v_cpc) +{ + cpv_parse_context *cpc = (cpv_parse_context *)v_cpc; + if (cpc) { + free((void *)cpc->start_string); + free(cpc); + } +} + +int cpv_read_cpv_header(void *v_cpc) +{ + cpv_parse_context *cpc = (cpv_parse_context *)v_cpc; + const char *s = cpc->curr_string; + +skipspaces: + while((*s != '\0') && isspace(*s)) + s++; + + /* + * skip POSIX-style '#' comments + * (allowed since this is based on POSIX sh(1) syntax) + */ + if (*s == '#') { + s++; + /* ignore everything until the end-of-line */ + while((*s != '\0') && (*s != '\n')) + s++; + goto skipspaces; + } + + if (*s == '(') { + cpc->curr_string=++s; + if (cpc->flags & CPVFLAG_DEBUG_OUTPUT) { + (void)fprintf(stderr, "cpv_read_cpv_header: begin-of-cpv\n"); + } + return 0; + } + + if (cpc->flags & CPVFLAG_DEBUG_OUTPUT) { + (void)fprintf(stderr, "cpv_read_cpv_header: end-of-string, should not happen\n"); + } + return 1; +} + +int cpv_parse_name_val(void *v_cpc, cpv_name_val *cpv_nv) +{ + cpv_parse_context *cpc = (cpv_parse_context *)v_cpc; +#ifdef _WIN32 + char *namebuff = _alloca(cpc->max_name_val_size+1); + char *valbuff = _alloca(cpc->max_name_val_size+1); +#else + char namebuff[cpc->max_name_val_size+1]; + char valbuff[cpc->max_name_val_size+1]; +#endif + + const char *s = cpc->curr_string; + + char *n; /* pointer in |namebuff| */ + char *v; /* pointer in |valbuff| */ + +skipspaces: + while((*s != '\0') && isspace(*s)) + s++; + + /* + * skip POSIX-style '#' comments + * (allowed since this is based on POSIX sh(1) syntax) + */ + if (*s == '#') { + s++; + /* ignore everything until the end-of-line */ + while((*s != '\0') && (*s != '\n')) + s++; + goto skipspaces; + } + + if (*s == '\0') { + if (cpc->flags & CPVFLAG_DEBUG_OUTPUT) { + (void)fprintf(stderr, "cpv_parse_name_val: " + "error: end-of-string, should not happen\n"); + } + return 1; + } + + /* cpv == "( foo=bar blabla=text )"*/ + if (*s == ')') { + if (cpc->flags & CPVFLAG_DEBUG_OUTPUT) { + (void)fprintf(stderr, "cpv_parse_name_val: end-of-cpv (OK)\n"); + } + return 1; + } + +parse_varname: + /* + * start parsing variable name + */ + + /* variable names MUST start with a letter! */ + if (!isalpha(*s)) { + if (cpc->flags & CPVFLAG_DEBUG_OUTPUT) { + (void)fprintf(stderr, + "cpv_parse_name_val: parser error, first char " + "in variable name not isalpha(c=%c)\n", + *s); + } + return 1; + } + + n = namebuff; + while((*s != '\0') && isalnum(*s)) + *n++ = *s++; + *n = '\0'; + + /* + * skip typed member varables + * (e.g. "typeset ", "typeset -i ", "typeset -l -i2" etc.) + */ + if (isspace(*s)) { + if ((!strcmp(namebuff, "typeset")) || + (!strcmp(namebuff, "integer")) || + (!strcmp(namebuff, "float")) || + (!strcmp(namebuff, "compound"))) { +skip_typeset_options: + while(isspace(*s)) + s++; + if (*s == '-') { + s++; + while(isalnum(*s)) + s++; + goto skip_typeset_options; + } + + goto parse_varname; + } + } + + /* handle '=' */ + if (*s != '=') { + if (cpc->flags & CPVFLAG_DEBUG_OUTPUT) { + (void)fprintf(stderr, "cpv_parse_name_val: " + "parser error, expected '=', got '%c'.\n", + *s); + } + return 1; + } + + s++; /* skip '=' */ + + /* + * start parsing variable value + */ + bool in_doublequotes=false; + bool in_singlequotes=false; + v = valbuff; +val_quotes: + if (in_singlequotes) { + while(*s != '\0') { + if (*s == '\'') { + in_singlequotes = false; + s++; + goto val_quotes; + } + + if ((*s == '\\') && (*(s+1) != '\0')) { + /* + * fixme: should support \ooo octals, + * \u[hex] unicode and \w[hex] wchar + */ + s++; + } + *v++ = *s++; + } + } + else if (in_doublequotes) { + while(*s != '\0') { + if (*s == '"') { + in_doublequotes = false; + s++; + goto val_quotes; + } + + if ((*s == '\\') && (*(s+1) != '\0')) { + /* + * fixme: should support \ooo octals, + * \u[hex] unicode and \w[hex] wchar + */ + s++; + } + + *v++ = *s++; + } + } + else + { + while((*s != '\0') && (!isspace(*s))) { + if (*s == '"') { + in_doublequotes = true; + s++; + goto val_quotes; + } + + if (*s == '\'') { + in_singlequotes = true; + s++; + goto val_quotes; + } + + if ((*s == '\\') && (*(s+1) != '\0')) { + /* + * fixme: should support \ooo octals, + * \u[hex] unicode and \w[hex] wchar + */ + s++; + } + *v++ = *s++; + } + } + + if (in_singlequotes) { + if (cpc->flags & CPVFLAG_DEBUG_OUTPUT) { + (void)fprintf(stderr, "cpv_parse_name_val: " + "parsererror, still in single quotes " + "at the end\n"); + } + return 1; + } + if (in_doublequotes) { + if (cpc->flags & CPVFLAG_DEBUG_OUTPUT) { + (void)fprintf(stderr, "cpv_parse_name_val: " + "parser error, still in double quotes " + "at the end\n"); + } + return 1; + } + + *v = '\0'; + +#if 0 + (void)printf("cpv_parse_name_val: name='%s', value='%s'\n", + namebuff, valbuff); +#endif + + cpv_nv->cpv_name = strdup(namebuff); + cpv_nv->cpv_value = strdup(valbuff); + + if ((cpv_nv->cpv_name == NULL) || (cpv_nv->cpv_value == NULL)) { + cpv_free_name_val_data(cpv_nv); + if (cpc->flags & CPVFLAG_DEBUG_OUTPUT) { + (void)fprintf(stderr, "cpv_parse_name_val: " + "parser error, out of memory\n"); + } + return 2; + } + + cpc->curr_string = s; + + return 0; +} + +void cpv_free_name_val_data(cpv_name_val *cnv) +{ + if (!cnv) + return; + + free((void *)cnv->cpv_name); + free((void *)cnv->cpv_value); + cnv->cpv_name = NULL; + cnv->cpv_value = NULL; +} diff --git a/daemon/cpvparser1.h b/daemon/cpvparser1.h new file mode 100644 index 0000000..a6ed609 --- /dev/null +++ b/daemon/cpvparser1.h @@ -0,0 +1,64 @@ + +/* + * MIT License + * + * Copyright (c) 2023 Roland Mainz <roland.mainz@nrubsig.org> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/* + * cpvparser1.h - simple ksh93 compound variable parsing + * + * It basically reads the output of $ print -v ... # like this: + * ---- snip ---- + * $ ksh93 -c 'compound c=( va=1 vb=hello ) ; print -v c' + * ( + * va=1 + * vb=hello + * ) + * ---- snip ---- + * + * ToDo: + * - arrays (indexed, sparse indexed and associative) + * - multibyte characters + * + * Written by Roland Mainz <roland.mainz@nrubsig.org> + */ + +#ifndef CPV_PARSER_H +#define CPV_PARSER_H 1 + +typedef struct cpv_name_val +{ + const char *cpv_name; + const char *cpv_value; +} cpv_name_val; + +/* Flags for |cpv_create_parser()| */ +#define CPVFLAG_DEBUG_OUTPUT (0x00000008L) + +/* prototypes */ +void *cpv_create_parser(const char *s, unsigned long flags, ...); +void cpv_free_parser(void *); +int cpv_read_cpv_header(void *); +void cpv_free_name_val_data(cpv_name_val *); +int cpv_parse_name_val(void *, cpv_name_val *); + +#endif /* !CPV_PARSER_H */ diff --git a/daemon/idmap.c b/daemon/idmap.c index 00af1fe..0672a85 100644 --- a/daemon/idmap.c +++ b/daemon/idmap.c @@ -3,6 +3,7 @@ * * Olga Kornievskaia <aglo@umich.edu> * Casey Bodley <cbodley@umich.edu> + * Roland Mainz <roland.mainz@nrubsig.org> * * This library is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by @@ -33,7 +34,7 @@ #include "daemon_debug.h" #define IDLVL 2 /* dprintf level for idmap logging */ -#define CYGWINIDLVL 2 /* dprintf level for idmap logging */ +#define CYGWINIDLVL 0 /* dprintf level for idmap logging */ #define FILTER_LEN 1024 #define NAME_LEN 32 @@ -133,7 +134,7 @@ static const struct config_option g_options[] = { OPT_ATTR("ldap_attr_gidNumber", "gidNumber", ATTR_GID), /* caching configuration */ - OPT_INT("cache_ttl", "60", cache_ttl), + OPT_INT("cache_ttl", "6000", cache_ttl), }; @@ -376,246 +377,6 @@ out: return status; } -#ifdef NFS41_DRIVER_FEATURE_NAMESERVICE_CYGWIN -int cygwin_getent_passwd(const char *name, char *res_loginname, uid_t *res_uid, gid_t *res_gid) -{ - char cmdbuff[1024]; - char passwd_line[1024]; - FILE* getent_pipe = NULL; - int res = 1; - unsigned long uid = -1; - unsigned long gid = -1; - struct _cypwent { - char* loginname; - char* passwd; - char* uidstr; - char* gidstr; - char* comment; - char* homedir; - char* shell; - } pwent = { 0 }; -#define PWENT_ENTRY(var, prevvar) \ - (((var) = strchr((prevvar), ':'))?(*(var)++ = '\0',(var)):(NULL)) - - dprintf(CYGWINIDLVL, "--> cygwin_getent_passwd('%s')\n", name); - -#if 1 - /* hack for testing, map "roland_mainz" to rmainz account */ - if ((!strcmp(name, "rmainz")) || (!strcmp(name, "1616"))) { - uid = 1616; - gid = 1616; - pwent.loginname = "rmainz"; - goto found; - } - if ((!strcmp(name, "nobody")) || (!strcmp(name, "no+body")) || - (!strcmp(name, "65534"))) { - uid = 65534; - gid = 65534; - pwent.loginname = "no+body"; /* Cygwin-specific */ - goto found; - } - if ((!strcmp(name, "root")) || (!strcmp(name, "0"))) { - uid = 0; - gid = 0; - pwent.loginname = "root"; - goto found; - } - if ((!strcmp(name, "iam")) || (!strcmp(name, "2010"))) { - uid = 2010; - gid = 2010; - pwent.loginname = "iam"; - goto found; - } - if ((!strcmp(name, "swulsch")) || (!strcmp(name, "1818"))) { - uid = 1818; - gid = 1818; - pwent.loginname = "swulsch"; - goto found; - } - if ((!strcmp(name, "mwenzel")) || (!strcmp(name, "8239"))) { - uid = 8239; - gid = 8239; - pwent.loginname = "mwenzel"; - goto found; - } -#endif - - /* fixme: better quoting for |name| needed */ - (void)snprintf(cmdbuff, sizeof(cmdbuff), "%s passwd \"%s\"", - "C:\\cygwin64\\bin\\getent.exe", - name); - if ((getent_pipe = _popen(cmdbuff, "rt")) == NULL) { - dprintf(CYGWINIDLVL, "cygwin_getent_passwd: /usr/bin/getent failed, errno='%s'\n", - strerror(errno)); - goto fail; - } - - if (fgets(passwd_line, sizeof(passwd_line), getent_pipe)) { - pwent.loginname = passwd_line; - if (!PWENT_ENTRY(pwent.passwd, pwent.loginname)) goto fail; - if (!PWENT_ENTRY(pwent.uidstr, pwent.passwd)) goto fail; - if (!PWENT_ENTRY(pwent.gidstr, pwent.uidstr)) goto fail; - if (!PWENT_ENTRY(pwent.comment, pwent.gidstr)) goto fail; - if (!PWENT_ENTRY(pwent.homedir, pwent.comment)) goto fail; - PWENT_ENTRY(pwent.shell, pwent.homedir); - - errno = 0; - uid = strtol(pwent.uidstr, NULL, 10); - if (errno != 0) - goto fail; - - errno = 0; - gid = strtol(pwent.gidstr, NULL, 10); - if (errno != 0) - goto fail; - -#if 0 - dprintf(CYGWINIDLVL, "cygwin_getent_passwd(): name='%s'\n", name); - dprintf(CYGWINIDLVL, "loginname\t='%s'\n", pwent.loginname); - dprintf(CYGWINIDLVL, "passwd\t='%s'\n", pwent.passwd); - dprintf(CYGWINIDLVL, "uidstr\t='%s' (%lu)\n", pwent.uidstr, (unsigned long)uid); - dprintf(CYGWINIDLVL, "gidstr\t='%s' (%lu)\n", pwent.gidstr, (unsigned long)gid); - dprintf(CYGWINIDLVL, "comment\t='%s'\n", pwent.comment); - dprintf(CYGWINIDLVL, "homedir\t='%s'\n", pwent.homedir); - dprintf(CYGWINIDLVL, "shell\t='%s'\n", pwent.shell); -#endif - -found: - if (res_loginname) - (void)strcpy_s(res_loginname, VAL_LEN, pwent.loginname); - *res_uid = uid; - *res_gid = gid; - res = 0; - } - -fail: - if (getent_pipe) - (void)_pclose(getent_pipe); - - if (res == 0) { - dprintf(CYGWINIDLVL, "<-- cygwin_getent_passwd('%s'): " - "returning res_uid=%lu, res_gid=%lu, res_loginname='%s'\n", - name, - (unsigned long)(*res_uid), - (unsigned long)(*res_gid), - res_loginname?res_loginname:"<NULL>"); - } - else { - dprintf(CYGWINIDLVL, "<-- cygwin_getent_passwd('%s'): no match found\n", - name); - } - - return res; -} - -int cygwin_getent_group(const char* name, char* res_group_name, gid_t* res_gid) -{ - char cmdbuff[1024]; - char group_line[1024]; - FILE* getent_pipe = NULL; - int res = 1; - unsigned long gid = -1; - struct _cygrent - { - char* group_name; - char* passwd; - char* gidstr; - char* userlist; - } grent = { 0 }; - - dprintf(CYGWINIDLVL, "--> cygwin_getent_group('%s')\n", name); - -#if 1 - if ((!strcmp(name, "rmainz")) || (!strcmp(name, "1616"))) { - gid = 1616; - grent.group_name = "rmainz"; - goto found; - } - if ((!strcmp(name, "nogroup")) || (!strcmp(name, "no+body")) || - (!strcmp(name, "65534"))) { - gid = 65534; - grent.group_name = "no+body"; /* Cygwin-specific */ - goto found; - } - if ((!strcmp(name, "root")) || (!strcmp(name, "0"))) { - gid = 0; - grent.group_name = "root"; - goto found; - } - if ((!strcmp(name, "iam")) || (!strcmp(name, "2010"))) { - gid = 2010; - grent.group_name = "iam"; - goto found; - } - if ((!strcmp(name, "swulsch")) || (!strcmp(name, "1818"))) { - gid = 1818; - grent.group_name = "swulsch"; - goto found; - } - if ((!strcmp(name, "mwenzel")) || (!strcmp(name, "8239"))) { - gid = 8239; - grent.group_name = "mwenzel"; - goto found; - } -#endif - - /* fixme: better quoting for |name| needed */ - (void)snprintf(cmdbuff, sizeof(cmdbuff), "%s group \"%s\"", - "C:\\cygwin64\\bin\\getent.exe", - name); - if ((getent_pipe = _popen(cmdbuff, "rt")) == NULL) { - dprintf(CYGWINIDLVL, - "cygwin_getent_group: /usr/bin/getent failed, errno='%s'\n", - strerror(errno)); - goto fail; - } - - if (fgets(group_line, sizeof(group_line), getent_pipe)) - { - grent.group_name = group_line; - if (!PWENT_ENTRY(grent.passwd, grent.group_name)) goto fail; - if (!PWENT_ENTRY(grent.gidstr, grent.passwd)) goto fail; - PWENT_ENTRY(grent.userlist, grent.gidstr); - - errno = 0; - gid = strtol(grent.gidstr, NULL, 10); - if (errno != 0) - goto fail; - -#if 0 - dprintf(CYGWINIDLVL, "cygwin_getent_group(): name='%s'\n", name); - dprintf(CYGWINIDLVL, "group_name\t='%s'\n", grent.group_name); - dprintf(CYGWINIDLVL, "passwd\t='%s'\n", grent.passwd); - dprintf(CYGWINIDLVL, "gidstr\t='%s' (%lu)\n", grent.gidstr, (unsigned long)gid); - dprintf(CYGWINIDLVL, "userlist\t='%s'\n", grent.userlist); -#endif - -found: - if (res_group_name) - (void)strcpy_s(res_group_name, VAL_LEN, grent.group_name); - *res_gid = gid; - res = 0; - } - -fail: - if (getent_pipe) - (void)_pclose(getent_pipe); - - if (res == 0) { - dprintf(CYGWINIDLVL, "<-- cygwin_getent_group('%s'): " - "returning res_gid=%lu, res_group_name='%s'\n", - name, (unsigned long)(*res_gid), - res_group_name?res_group_name:"<NULL>"); - } - else { - dprintf(CYGWINIDLVL, - "<-- cygwin_getent_group('%s'): no match found\n", - name); - } - - return res; -} -#endif /* NFS41_DRIVER_FEATURE_NAMESERVICE_CYGWIN */ /* generic cache */ typedef struct list_entry* (*entry_alloc_fn)(); @@ -906,7 +667,7 @@ static int idmap_lookup_user( if (status == NO_ERROR) { /* don't return expired entries; query new attributes * and overwrite the entry with cache_insert() */ - if ((time(NULL) - user->last_updated) < context->config.cache_ttl) + if (difftime(time(NULL), user->last_updated) < (double)context->config.cache_ttl) goto out; } #ifndef NFS41_DRIVER_FEATURE_NAMESERVICE_CYGWIN @@ -1060,7 +821,7 @@ static int idmap_lookup_group( if (status == NO_ERROR) { /* don't return expired entries; query new attributes * and overwrite the entry with cache_insert() */ - if ((time(NULL) - group->last_updated) < context->config.cache_ttl) + if (difftime(time(NULL), group->last_updated) < (double)context->config.cache_ttl) goto out; } #ifndef NFS41_DRIVER_FEATURE_NAMESERVICE_CYGWIN diff --git a/daemon/idmap_cygwin.c b/daemon/idmap_cygwin.c new file mode 100644 index 0000000..8d62f2f --- /dev/null +++ b/daemon/idmap_cygwin.c @@ -0,0 +1,243 @@ +/* NFSv4.1 client for Windows + * Copyright 2023 Roland Mainz <roland.mainz@nrubsig.org> + * + * Roland Mainz <roland.mainz@nrubsig.org> + * + * This library is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation; either version 2.1 of the License, or (at + * your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * without any warranty; without even the implied warranty of merchantability + * or fitness for a particular purpose. See the GNU Lesser General Public + * License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA + */ + +#include <Windows.h> +#include <strsafe.h> +#include <Winldap.h> +#include <stdlib.h> /* for strtoul() */ +#include <errno.h> +#include <time.h> + +#include "nfs41_build_features.h" +#include "idmap.h" +#include "nfs41_const.h" +#include "list.h" +#include "daemon_debug.h" +#ifdef NFS41_DRIVER_FEATURE_NAMESERVICE_CYGWIN +#include "cpvparser1.h" +#endif /* NFS41_DRIVER_FEATURE_NAMESERVICE_CYGWIN */ + +#define CYGWINIDLVL 0 /* dprintf level for idmap logging */ + +#define VAL_LEN 257 + +#define CYGWIN_IDMAPPER_SCRIPT \ + ("C:\\cygwin64\\bin\\ksh93.exe " \ + "/home/roland_mainz/work/msnfs41_uidmapping/ms-nfs41-client/cygwin_idmapper.ksh") + + +#ifdef NFS41_DRIVER_FEATURE_NAMESERVICE_CYGWIN +int cygwin_getent_passwd(const char *name, char *res_loginname, uid_t *res_uid, gid_t *res_gid) +{ + char cmdbuff[1024]; + char buff[2048]; + size_t num_buff_read; + FILE* script_pipe = NULL; + int res = 1; + unsigned long uid = -1; + unsigned long gid = -1; + void *cpvp = NULL; + int numcnv = 0; + int i = 0; + cpv_name_val cnv[256] = { 0 }; + cpv_name_val *cnv_cur = NULL; + const char *localaccoutname = NULL; + + dprintf(CYGWINIDLVL, "--> cygwin_getent_passwd('%s')\n", name); + + /* fixme: better quoting for |name| needed */ + (void)snprintf(cmdbuff, sizeof(cmdbuff), "%s nfsserveruser2localaccount \"%s\"", + CYGWIN_IDMAPPER_SCRIPT, + name); + if ((script_pipe = _popen(cmdbuff, "rt")) == NULL) { + dprintf(0, "cygwin_getent_passwd: '%s' failed, errno='%s'\n", + cmdbuff, + strerror(errno)); + goto fail; + } + + num_buff_read = fread(buff, 1, sizeof(buff), script_pipe); + if (num_buff_read < 10) { + dprintf(0, "cygwin_getent_passwd: Could not read enough data, returned %d\n", (int)num_buff_read); + goto fail; + } + + buff[num_buff_read] = '\0'; + + cpvp = cpv_create_parser(buff, 0/*CPVFLAG_DEBUG_OUTPUT*/); + if (!cpvp) { + dprintf(0, "cygwin_getent_passwd: Could not create parser\n"); + goto fail; + } + + if (cpv_read_cpv_header(cpvp)) { + dprintf(0, "cygwin_getent_passwd: cpv_read_cpv_header failed\n"); + goto fail; + } + + for (numcnv=0 ; cpv_parse_name_val(cpvp, &cnv[numcnv]) == 0 ; numcnv++) { + } + + for (i=0 ; i < numcnv ; i++) { + cnv_cur = &cnv[i]; + if (!strcmp("localaccoutname", cnv_cur->cpv_name)) { + localaccoutname = cnv_cur->cpv_value; + } + else if (!strcmp("localuid", cnv_cur->cpv_name)) { + errno = 0; + uid = strtol(cnv_cur->cpv_value, NULL, 10); + if (errno != 0) + goto fail; + } + else if (!strcmp("localgid", cnv_cur->cpv_name)) { + errno = 0; + gid = strtol(cnv_cur->cpv_value, NULL, 10); + if (errno != 0) + goto fail; + } + } + + if (res_loginname) + (void)strcpy_s(res_loginname, VAL_LEN, localaccoutname); + *res_uid = uid; + *res_gid = gid; + res = 0; + +fail: + if (script_pipe) + (void)_pclose(script_pipe); + + for (i=0 ; i < numcnv ; i++) { + cpv_free_name_val_data(&cnv[i]); + } + + cpv_free_parser(cpvp); + + if (res == 0) { + dprintf(CYGWINIDLVL, "<-- cygwin_getent_passwd('%s'): " + "returning res_uid=%lu, res_gid=%lu, res_loginname='%s'\n", + name, + (unsigned long)(*res_uid), + (unsigned long)(*res_gid), + res_loginname?res_loginname:"<NULL>"); + } + else { + dprintf(CYGWINIDLVL, "<-- cygwin_getent_passwd('%s'): no match found\n", + name); + } + + return res; +} + +int cygwin_getent_group(const char* name, char* res_group_name, gid_t* res_gid) +{ + char cmdbuff[1024]; + char buff[2048]; + size_t num_buff_read; + FILE* script_pipe = NULL; + int res = 1; + unsigned long gid = -1; + void *cpvp = NULL; + int numcnv = 0; + int i = 0; + cpv_name_val cnv[256] = { 0 }; + cpv_name_val *cnv_cur = NULL; + + const char *localgroupname = NULL; + + dprintf(CYGWINIDLVL, "--> cygwin_getent_group('%s')\n", name); + + /* fixme: better quoting for |name| needed */ + (void)snprintf(cmdbuff, sizeof(cmdbuff), "%s nfsserveruser2localgroup \"%s\"", + CYGWIN_IDMAPPER_SCRIPT, + name); + if ((script_pipe = _popen(cmdbuff, "rt")) == NULL) { + dprintf(0, "cygwin_getent_group: '%s' failed, errno='%s'\n", + cmdbuff, + strerror(errno)); + goto fail; + } + + num_buff_read = fread(buff, 1, sizeof(buff), script_pipe); + if (num_buff_read < 10) { + dprintf(0, "cygwin_getent_group: Could not read enough data, returned %d\n", (int)num_buff_read); + goto fail; + } + + buff[num_buff_read] = '\0'; + + cpvp = cpv_create_parser(buff, 0/*CPVFLAG_DEBUG_OUTPUT*/); + if (!cpvp) { + dprintf(0, "cygwin_getent_group: Could not create parser\n"); + goto fail; + } + + if (cpv_read_cpv_header(cpvp)) { + dprintf(0, "cygwin_getent_group: cpv_read_cpv_header failed\n"); + goto fail; + } + + for (numcnv=0 ; cpv_parse_name_val(cpvp, &cnv[numcnv]) == 0 ; numcnv++) { + } + + for (i=0 ; i < numcnv ; i++) { + cnv_cur = &cnv[i]; + if (!strcmp("localgroupname", cnv_cur->cpv_name)) { + localgroupname = cnv_cur->cpv_value; + } + else if (!strcmp("localgid", cnv_cur->cpv_name)) { + errno = 0; + gid = strtol(cnv_cur->cpv_value, NULL, 10); + if (errno != 0) + goto fail; + } + } + + if (res_group_name) + (void)strcpy_s(res_group_name, VAL_LEN, localgroupname); + *res_gid = gid; + res = 0; + +fail: + if (script_pipe) + (void)_pclose(script_pipe); + + for (i=0 ; i < numcnv ; i++) { + cpv_free_name_val_data(&cnv[i]); + } + + cpv_free_parser(cpvp); + + if (res == 0) { + dprintf(CYGWINIDLVL, "<-- cygwin_getent_group('%s'): " + "returning res_gid=%lu, res_group_name='%s'\n", + name, + (unsigned long)(*res_gid), + res_group_name?res_group_name:"<NULL>"); + } + else { + dprintf(CYGWINIDLVL, "<-- cygwin_getent_group('%s'): no match found\n", + name); + } + + return res; +} +#endif /* NFS41_DRIVER_FEATURE_NAMESERVICE_CYGWIN */ +

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