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54b1273395
dlopen may clobber errno. The nss_test_errno module uses an ELF
constructor to achieve that, but there could be internal errors
during dlopen that cause this, too. Therefore, the NSS framework
has to guard against such errno clobbers.
__nss_module_get_function is currently the only function that calls
__nss_module_load, so it is sufficient to save and restore errno
around this call.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
(cherry picked from commit 9bdf92c79d)
197 lines
6.1 KiB
Makefile
197 lines
6.1 KiB
Makefile
# Copyright (C) 1996-2021 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <https://www.gnu.org/licenses/>.
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#
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# Makefile for name service switch.
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#
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subdir := nss
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include ../Makeconfig
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headers := nss.h
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# This is the trivial part which goes into libc itself.
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routines = nsswitch getnssent getnssent_r digits_dots \
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valid_field valid_list_field rewrite_field \
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$(addsuffix -lookup,$(databases)) \
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compat-lookup nss_hash nss_files_fopen \
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nss_readline nss_parse_line_result \
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nss_fgetent_r nss_module nss_action \
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nss_action_parse nss_database nss_files_data \
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nss_files_functions
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# These are the databases that go through nss dispatch.
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# Caution: if you add a database here, you must add its real name
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# in databases.def, too.
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databases = proto service hosts network grp pwd ethers \
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spwd netgrp alias sgrp
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ifneq (,$(filter sunrpc,$(subdirs)))
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databases += key rpc
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have-sunrpc := 1
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else
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have-sunrpc := 0
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endif
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CPPFLAGS-getent.c = -DHAVE_SUNRPC=$(have-sunrpc)
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others := getent makedb
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install-bin := getent makedb
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makedb-modules = xmalloc hash-string
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others-extras = $(makedb-modules)
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extra-objs += $(makedb-modules:=.o)
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tests-static = tst-field
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tests-internal = tst-field
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tests = test-netdb test-digits-dots tst-nss-getpwent bug17079 \
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tst-nss-test1 \
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tst-nss-test2 \
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tst-nss-test4 \
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tst-nss-test5 \
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tst-nss-test_errno
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xtests = bug-erange
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tests-container = \
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tst-nss-compat1 \
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tst-nss-test3 \
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tst-nss-files-hosts-long \
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tst-nss-db-endpwent \
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tst-nss-db-endgrent \
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tst-reload1 tst-reload2
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# Tests which need libdl
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ifeq (yes,$(build-shared))
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tests += tst-nss-files-hosts-erange
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tests += tst-nss-files-hosts-multi
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tests += tst-nss-files-hosts-getent
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tests += tst-nss-files-alias-leak
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tests += tst-nss-files-alias-truncated
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endif
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# If we have a thread library then we can test cancellation against
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# some routines like getpwuid_r.
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ifeq (yes,$(have-thread-library))
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tests += tst-cancel-getpwuid_r
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endif
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# Specify rules for the nss_* modules. We have some services.
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services := files db compat
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extra-libs = $(services:%=libnss_%)
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# These libraries will be built in the `others' pass rather than
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# the `lib' pass, because they depend on libc.so being built already.
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extra-libs-others = $(extra-libs)
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# The sources are found in the appropriate subdir.
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subdir-dirs = $(services:%=nss_%)
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vpath %.c $(subdir-dirs) ../locale/programs ../intl
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routines += \
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$(addprefix files-, $(filter-out key, $(databases))) \
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files-init \
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files-initgroups \
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# routines
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# Build only an empty shared libnss_files.
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libnss_files-inhibit-o = $(filter-out .os,$(object-suffixes))
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# Pretend that libnss_files.so is a linker script, so that the symbolic link
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# is not installed.
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install-lib-ldscripts = libnss_files.so
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$(inst_libdir)/libnss_files.so:
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libnss_db-dbs := $(addprefix db-,\
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$(filter-out hosts network key alias,\
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$(databases))) \
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db-initgroups
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libnss_db-routines := $(libnss_db-dbs) db-open db-init hash-string
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generated += $(filter-out db-alias.c db-netgrp.c, \
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$(addsuffix .c,$(libnss_db-dbs)))
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libnss_compat-routines := $(addprefix compat-,grp pwd spwd initgroups) \
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nisdomain
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install-others += $(inst_vardbdir)/Makefile
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# Build static module into libc if requested
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libnss_db-inhibit-o = $(filter-out .os,$(object-suffixes))
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libnss_compat-inhibit-o = $(filter-out .os,$(object-suffixes))
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ifeq ($(build-static-nss),yes)
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tests-static += tst-nss-static
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endif
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extra-test-objs += nss_test1.os nss_test2.os nss_test_errno.os
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include ../Rules
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ifeq (yes,$(have-selinux))
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LDLIBS-makedb := -lselinux
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endif
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libnss-libc = $(common-objpfx)linkobj/libc.so
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# Target-specific variable setting to link objects using deprecated
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# RPC interfaces with the version of libc.so that makes them available
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# for new links:
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$(services:%=$(objpfx)libnss_%.so): libc-for-link = $(libnss-libc)
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$(libnss_db-dbs:%=$(objpfx)%.c): $(objpfx)db-%.c: nss_files/files-%.c
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@rm -f $@.new
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(echo '#define EXTERN_PARSER';\
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echo '#define GENERIC "../nss_db/db-XXX.c"';\
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echo '#include "$<"') > $@.new
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mv -f $@.new $@
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$(objpfx)makedb: $(makedb-modules:%=$(objpfx)%.o)
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$(inst_vardbdir)/Makefile: db-Makefile $(+force)
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$(do-install)
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libnss_test1.so-no-z-defs = 1
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libnss_test2.so-no-z-defs = 1
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rtld-tests-LDFLAGS += -Wl,--dynamic-list=nss_test.ver
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libof-nss_test1 = extramodules
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libof-nss_test2 = extramodules
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libof-nss_test_errno = extramodules
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$(objpfx)/libnss_test1.so: $(objpfx)nss_test1.os $(link-libc-deps)
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$(build-module)
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$(objpfx)/libnss_test2.so: $(objpfx)nss_test2.os $(link-libc-deps)
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$(build-module)
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$(objpfx)/libnss_test_errno.so: $(objpfx)nss_test_errno.os $(link-libc-deps)
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$(build-module)
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$(objpfx)nss_test2.os : nss_test1.c
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# Use the nss_files suffix for these objects as well.
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$(objpfx)/libnss_test1.so$(libnss_files.so-version): $(objpfx)/libnss_test1.so
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$(make-link)
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$(objpfx)/libnss_test2.so$(libnss_files.so-version): $(objpfx)/libnss_test2.so
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$(make-link)
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$(objpfx)/libnss_test_errno.so$(libnss_files.so-version): \
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$(objpfx)/libnss_test_errno.so
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$(make-link)
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$(patsubst %,$(objpfx)%.out,$(tests) $(tests-container)) : \
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$(objpfx)/libnss_test1.so$(libnss_files.so-version) \
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$(objpfx)/libnss_test2.so$(libnss_files.so-version) \
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$(objpfx)/libnss_test_errno.so$(libnss_files.so-version)
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ifeq (yes,$(have-thread-library))
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$(objpfx)tst-cancel-getpwuid_r: $(shared-thread-library)
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endif
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$(objpfx)tst-nss-files-alias-leak.out: $(objpfx)/libnss_files.so
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$(objpfx)tst-nss-files-alias-truncated.out: $(objpfx)/libnss_files.so
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