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* Update copyright dates with scripts/update-copyrights.Joseph Myers2018-01-011-1/+1
| | | | | | | * All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
* resolv: Introduce struct resolv_context [BZ #21668]Florian Weimer2017-07-031-10/+32
| | | | | | | | | | | | struct resolv_context objects provide a temporary resolver context which does not change during a name lookup operation. Only when the outmost context is created, the stub resolver configuration is verified to be current (at present, only against previous res_init calls). Subsequent attempts to obtain the context will reuse the result of the initial verification operation. struct resolv_context can also be extended in the future to store data which needs to be deallocated during thread cancellation.
* Update copyright dates with scripts/update-copyrights.Joseph Myers2017-01-011-1/+1
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* NSS: Implement group merging support.Stephen Gallagher2016-04-291-3/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | https://sourceware.org/glibc/wiki/Proposals/GroupMerging == Justification == It is common today for users to rely on centrally-managed user stores for handling their user accounts. However, much software existing today does not have an innate understanding of such accounts. Instead, they commonly rely on membership in known groups for managing access-control (for example the "wheel" group on Fedora and RHEL systems or the "adm" group on Debian-derived systems). In the present incarnation of nsswitch, the only way to have such groups managed by a remote user store such as FreeIPA or Active Directory would be to manually remove the groups from /etc/group on the clients so that nsswitch would then move past nss_files and into the SSSD, nss-ldap or other remote user database. == Solution == With this patch, a new action is introduced for nsswitch: NSS_ACTION_MERGE. To take advantage of it, one will add [SUCCESS=merge] between two database entries in the nsswitch.conf file. When a group is located in the first of the two group entries, processing will continue on to the next one. If the group is also found in the next entry (and the group name and GID are an exact match), the member list of the second entry will be added to the group object to be returned. == Implementation == After each DL_LOOKUP_FN() returns, the next action is checked. If the function returned NSS_STATUS_SUCCESS and the next action is NSS_ACTION_MERGE, a copy of the result buffer is saved for the next pass through the loop. If on this next pass through the loop the database returns another instance of a group matching both the group name and GID, the member list is added to the previous list and it is returned as a single object. If the following database does not contain the same group, then the original is copied back into the destination buffer. This patch implements merge functionality only for the group database. For other databases, there is a default implementation that will return the EINVAL errno if a merge is requested. The merge functionality can be implemented for other databases at a later time if such is needed. Each database must provide a unique implementation of the deep-copy and merge functions. If [SUCCESS=merge] is present in nsswitch.conf for a glibc version that does not support it, glibc will process results up until that operation, at which time it will return results if it has found them or else will simply return an error. In practical terms, this ends up behaving like the remainder of the nsswitch.conf line does not exist. == Iterators == This feature does not modify the iterator functionality from its current behavior. If getgrnam() or getgrgid() is called, glibc will iterate through all entries in the `group` line in nsswitch.conf and display the list of members without attempting to merge them. This is consistent with the behavior of nss_files where if two separate lines are specified for the same group in /etc/groups, getgrnam()/getgrgid() will display both. Clients are already expected to handle this gracefully. == No Premature Optimizations == The following is a list of places that might be eligible for optimization, but were not overengineered for this initial contribution: * Any situation where a merge may occur will result in one malloc() of the same size as the input buffer. * Any situation where a merge does occur will result in a second malloc() to hold the list of pointers to member name strings. * The list of members is simply concatenated together and is not tested for uniqueness (which is identical to the behavior for nss_files, which will simply return identical values if they both exist on the line in the file. This could potentially be optimized to reduce space usage in the buffer, but it is both complex and computationally expensive to do so. == Testing == I performed testing by running the getent utility against my newly-built glibc and configuring /etc/nsswitch.conf with the following entry: group: group: files [SUCCESS=merge] sss In /etc/group I included the line: wheel:x:10:sgallagh I then configured my local SSSD using the id_provider=local to respond with: wheel:*:10:localuser,localuser2 I then ran `getent group wheel` against the newly-built glibc in multiple situations and received the expected output as described above: * When SSSD was running. * When SSSD was configured in nsswitch.conf but the daemon was not running. * When SSSD was configured in nsswitch.conf but nss_sss.so.2 was not installed on the system. * When the order of 'sss' and 'files' was reversed. * All of the above with the [SUCCESS=merge] removed (to ensure no regressions). * All of the above with `getent group 10`. * All of the above with `getent group` with and without `enumerate=true` set in SSSD. * All of the above with and without nscd enabled on the system.
* Update copyright dates with scripts/update-copyrights.Joseph Myers2016-01-041-1/+1
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* Update copyright dates with scripts/update-copyrights.Joseph Myers2015-01-021-1/+1
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* Update copyright notices with scripts/update-copyrightsAllan McRae2014-01-011-1/+1
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* Update copyright notices with scripts/update-copyrights.Joseph Myers2013-01-021-1/+1
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* Replace FSF snail mail address with URLs.Paul Eggert2012-02-091-3/+2
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* Remove doubled words.Jim Meyering2011-04-221-2/+2
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* * nscd/Makefile (nscd-modules): Replace gethstbynm2_r withUlrich Drepper2007-10-301-10/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | gethstbynm3_r. * nscd/gethstbynm2_r.c: Remove. * nscd/gethstbynm3_r.c: New file. * nscd/aicache.c (addhstaiX): Use __gethostbyaddr2_r instead of __gethostbyaddr_r. * nscd/gethstbyad_r.c: Generate __gethostbyaddr2_r function. Define __gethostbyaddr_r compatibility wrapper. * nscd/hstcache.c (cache_addhst): Add ttl parameter. Use it when determining timeout of entry. (lookup): Take new parameter and pass it to __gethostbyname3_r and __gethostbyaddr2_r. (addhstbyX): Pass reference to variable for TTL to lookup and cache_addhst. * nss/Versions [glibc] (GLIBC_PRIVATE): Export __nss_passwd_lookup2, __nss_group_lookup2, __nss_hosts_lookup2, __nss_services_lookup2, and __nss_next2. Remove __nss_services_lookup. * nss/XXX-lookup.c: Name function now *_lookup2. Add new parameter. Add compat wrapper. * nss/getXXbyYY_r.c: Changes to call new *_lookup2 functions and __nss_next2. * nss/getXXent_r.c: Likewise. * nss/getnssent_r.c: Likewise. * nss/nsswitch.c (__nss_lookup): Add new parameter. If first function does not exist in module, try the optional second name. (__nss_next2): New function. (__nss_next): Now wrapper around __nss_next2. * nss/nsswitch.h: Adjust __nss_lookup prototype. Declare __nss_next2. Adjust definition of db_lookup_function type. * nss/service-lookup.c: Define NO_COMPAT. * include/netdb.h: Declare __gethostbyaddr2_r and __gethostbyname3_r. * inet/ether_hton.c: Use __nss_next2 instead of __nss_next. * inet/ether_ntoh.c: Likewise. * sunrpc/netname.c: Likewise. * sunrpc/publickey.c: Likewise. * inet/getnetgrent.c: Likewise. Adjust calls to __nss_lookup. * inet/gethstbyad_r.c (DB_LOOKUP_FCT): Change to __nss_hosts_lookup2. * inet/gethstbynm2_r.c (DB_LOOKUP_FCT): Likewise. * inet/gethstbynm_r.c (DB_LOOKUP_FCT): Likewise. * inet/gethstent_r.c (DB_LOOKUP_FCT): Likewise. * nscd/aicache.c (addhstaiX): Fix default TTL handling. * inet/getnetgrent.c (setup): Encrypt static pointer.
* Update.Ulrich Drepper2004-08-051-7/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 2004-08-04 Jakub Jelinek <jakub@redhat.com> * hesiod/hesiod.c (__hesiod_res_get): Use calloc instead of malloc + memset. (__hesiod_res_set): Free nsaddrs. * include/resolv.h (__res_maybe_init): Add prototype. * resolv/resolv.h (struct __res_state): Add _u._ext.initstamp field. * resolv/Versions (libc): Add __res_maybe_init@@GLIBC_PRIVATE. * resolv/res_libc.c (__res_initstamp, lock): New variables. (res_init): Increase __res_initstamp. (__res_maybe_init): New function. * resolv/res_init.c (__res_vinit): Initialize _u._ext.initstamp. * hesiod/hesiod.c (__hesiod_res_get): Use __res_maybe_init instead of RES_INIT check and {res_ninit,__res_ninit,res_init} call. * sysdeps/posix/getaddrinfo.c (gaih_inet): Likewise. * resolv/nss_dns/dns-host.c (_nss_dns_gethostbyname2_r, _nss_dns_gethostbyaddr_r): Likewise. * resolv/nss_dns/dns-network.c (_nss_dns_getnetbyname_r, _nss_dns_getnetbyaddr_r): Likewise. * resolv/gethnamaddr.c (gethostbyname, gethostbyname2, gethostbyaddr): Likewise. * resolv/res_data.c (fp_nquery, res_mkquery, res_mkupdate, res_isourserver, res_sendsigned, res_update, res_search, res_querydomain): Likewise. * nss/getXXbyYY_r.c (INTERNAL (REENTRANT_NAME)): Likewise. * nss/digits_dots.c (__nss_hostname_digits_dots): Likewise. * nss/getnssent_r.c (__nss_setent, __nss_endent, __nss_getent_r): Likewise. * sysdeps/posix/getaddrinfo.c (gaih_inet): Set ai_family for V4-mapped IPv6 addresses and req->ai_family==AF_INET. Reported by A. Guru <a.guru@sympatico.ca>. * po/pl.po: Likewise. characters than necessary.
* * nss/getXXent.c (GETFUNC_NAME): Use union type to avoid strict Andreas Jaeger2002-11-101-18/+34
| | | | | | | | | | | | | | | | aliasing problem. * nss/getXXbyYY_r.c (INTERNAL): Likewise. * nss/getnssent_r.c (__nss_getent_r): Likewise. (__nss_setent): Likewise. (__nss_getent_r): Likewise. * inet/getnetgrent_r.c (innetgr): Likewise. (__internal_setnetgrent_reuse): Likewise. (internal_getnetgrent_r): Likewise. * inet/ether_hton.c (ether_hostton): Likewise. * inet/ether_ntoh.c (ether_ntohost): Likewise. * sunrpc/netname.c (netname2user): Likewise. * sunrpc/publickey.c (getpublickey): Likewise. (getsecretkey): Likewise.
* * nss/getnssent_r.c (__nss_getent_r): Use EAGAIN instead of errnoRoland McGrath2002-09-121-2/+5
| | | | | | | | | when using h_errno and it's not set to NETDB_INTERNAL. * nss/getXXbyYY_r.c [NEED_H_ERRNO]: Likewise. * Makefile ($(common-objpfx)testrun.sh): New target. (others): Depend on it. (postclean-generated): Append it.
* * nss/getnssent_r.c (__nss_getent_r): Return ENOENT if status isRoland McGrath2002-08-311-4/+5
| | | | | | neither SUCCESS nor TRYAGAIN (see 2002-08-25 change [PR libc/4259]). * nss/getnssent_r.c (__nss_getent_r): Set *H_ERRNOP, not global one.
* Update to LGPL v2.1.Andreas Jaeger2001-07-061-8/+8
| | | | | | | | | | | | | | 2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
* Update.Ulrich Drepper2000-12-081-0/+201
2000-12-05 H.J. Lu <hjl@gnu.org> * nss/Makefile (routines): Add getnssent and getnssent_r. * nss/nsswitch.h (__nss_setent): New internal NSS function. (__nss_endent): Likewise. (__nss_getent_r): Likewise. (__nss_getent): Likewise. * nss/getnssent_r.c: New file. * nss/getnssent.c: New file. * nss/getXXent.c (H_ERRNO_VAR): Updated. (GETFUNC_NAME): Updated to call __nss_getent (). * nss/getXXent_r.c (H_ERRNO_VAR_P): New. (STAYOPEN_TMPVAR): Updated. (STAYOPEN_VAR): Updated. (SETFUNC_NAME): Updated to call __nss_setent (). (ENDFUNC_NAME): Updated to call __nss_endent (). (INTERNAL (REENTRANT_GETNAME)): Updated to call __nss_getent_r ().