Here's the complete patch (but still none of the new files), rebased and relative to the trunk. As before, this passes "make distcheck". And as Daniel Veillard noted, you'd need git. However the next patch will cvs-add all of the bootstrap-imported files, so you won't need git unless you want to try this particular patch. ------------------------------------------------------------- Use gnulib, starting with its physmem and getaddrinfo modules. New files go into these directories: gnulib/lib gnulib/m4 tests/gnulib * bootstrap: A wrapper around gnulib-tool. * configure.in: Invoke gl_EARLY and gl_INIT, being careful to put gl_EARLY before any macro that uses AC_COMPILE_IFELSE. (AC_OUTPUT): Add lib/Makefile and gl-tests/Makefile. Remove m4/Makefile. * Makefile.am (SUBDIRS): Add gnulib/lib and tests/gnulib. Remove m4. * m4/Makefile.am: Remove file. Not needed. * src/Makefile.am (INCLUDES): Add -I$(top_srcdir)/gnulib/lib -I../gnulib/lib. (LDADDS, libvirt_la_LIBADD): Add ../gnulib/lib/libgnu.la. * src/nodeinfo.c: Include "physmem.h". * qemud/qemud.c, src/remote_internal.c: Include "getaddrinfo.h". (MEMINFO_PATH, linuxNodeInfoMemPopulate): Remove definitions. (virNodeInfoPopulate): Use physmem_total, not linuxNodeInfoMemPopulate. * tests/Makefile.am (INCLUDES): Add -I$(top_srcdir)/gnulib/lib -I../gnulib/lib. (LDADDS): Add ../gnulib/lib/libgnu.la. * qemud/Makefile.am (libvirtd_LDADD): Add ../gnulib/lib/libgnu.la. * tests/nodeinfotest.c (linuxTestCompareFiles): No longer read total memory from a file. Update expected output not to include "Memory: NNNN" * tests/nodeinfodata/linux-nodeinfo-1.txt: * tests/nodeinfodata/linux-nodeinfo-2.txt: * tests/nodeinfodata/linux-nodeinfo-3.txt: * tests/nodeinfodata/linux-nodeinfo-4.txt: * tests/nodeinfodata/linux-nodeinfo-5.txt: * tests/nodeinfodata/linux-nodeinfo-6.txt: * src/test.c [WITH_TEST]: Remove definition of _GNU_SOURCE that would conflict with the one now in "config.h". * autogen.sh: Add -I gnulib/m4. Signed-off-by: Jim Meyering <meyering(a)redhat.com&gt; --- Makefile.am | 5 +- autogen.sh | 2 +- bootstrap | 108 +++++++++++++++++++++++++++++++ configure.in | 11 ++- m4/Makefile.am | 3 - qemud/Makefile.am | 3 +- qemud/qemud.c | 1 + src/Makefile.am | 8 ++- src/nodeinfo.c | 55 +++------------- src/remote_internal.c | 1 + src/test.c | 2 - tests/Makefile.am | 2 + tests/nodeinfodata/linux-nodeinfo-1.txt | 2 +- tests/nodeinfodata/linux-nodeinfo-2.txt | 2 +- tests/nodeinfodata/linux-nodeinfo-3.txt | 2 +- tests/nodeinfodata/linux-nodeinfo-4.txt | 2 +- tests/nodeinfodata/linux-nodeinfo-5.txt | 2 +- tests/nodeinfodata/linux-nodeinfo-6.txt | 2 +- tests/nodeinfotest.c | 23 ++----- 19 files changed, 151 insertions(+), 85 deletions(-) create mode 100755 bootstrap delete mode 100644 m4/Makefile.am diff --git a/Makefile.am b/Makefile.am index eaa204e..1f2ca52 100644 --- a/Makefile.am +++ b/Makefile.am @@ -1,8 +1,9 @@ ## Process this file with automake to produce Makefile.in -SUBDIRS = src qemud proxy include docs @PYTHON_SUBDIR@ tests po m4 scripts +SUBDIRS = gnulib/lib src qemud proxy include docs @PYTHON_SUBDIR@ \ + tests/gnulib tests po scripts -ACLOCAL_AMFLAGS = -I m4 +ACLOCAL_AMFLAGS = -I m4 -I gnulib/m4 EXTRA_DIST = libvirt.spec.in libvirt.spec COPYING.LIB \ libvirt.pc.in libvirt.pc TODO AUTHORS ChangeLog \ diff --git a/autogen.sh b/autogen.sh index 97b636d..3bcffd3 100755 --- a/autogen.sh +++ b/autogen.sh @@ -57,7 +57,7 @@ fi autopoint --force #rm -rf m4 libtoolize --copy --force -aclocal -I m4 +aclocal -I m4 -I gnulib/m4 autoheader automake --add-missing autoconf diff --git a/bootstrap b/bootstrap new file mode 100755 index 0000000..ca186bd --- /dev/null +++ b/bootstrap @@ -0,0 +1,108 @@ +#!/bin/sh +# Run this after autogen.sh, to pull in all of the gnulib-related bits. +# It's important to run *after* autogen.sh, since it updates some of +# the same files autogen.sh does, yet those from gnulib are newer, +# and match the tests. So if a gnulib bug has been fixed since the +# snapshot taken for whatever gettext release you're using, yet you +# run "make check" against the wrong version, the corresponding unit +# test in gl-tests/ may well fail. + +usage() { + echo >&2 "\ +Usage: $0 [OPTION]... +Bootstrap this package from the checked-out sources. + +Options: + --gnulib-srcdir=DIRNAME Specify the local directory where gnulib + sources reside. Use this if you already + have gnulib sources on your machine, and + do not want to waste your bandwidth downloading + them again. + +If the file bootstrap.conf exists in the current working directory, its +contents are read as shell variables to configure the bootstrap. + +Running without arguments will suffice in most cases. +" +} + +for option +do + case $option in + --help) + usage + exit;; + --gnulib-srcdir=*) + GNULIB_SRCDIR=`expr "$option" : '--gnulib-srcdir=\(.*\)'`;; + *) + echo >&2 "$0: $option: unknown option" + exit 1;; + esac +done + +cleanup_gnulib() { + st=$? + rm -fr .gnulib + exit $st +} + +case ${GNULIB_SRCDIR--} in +-) + if [ ! -d gnulib ]; then + echo "$0: getting gnulib files..." + + trap cleanup_gnulib 1 2 13 15 + + git clone --depth 1 git://git.sv.gnu.org/gnulib .gnulib || + cleanup_gnulib + + trap - 1 2 13 15 + fi + GNULIB_SRCDIR=.gnulib +esac + +gnulib_tool=$GNULIB_SRCDIR/gnulib-tool +<$gnulib_tool || exit + +# Tell gnulib to: +# put tests in new tests/gnulib/ dir +# put *.m4 files in new gnulib/m4/ dir +# put *.[ch] files in new gnulib/lib/ dir. +# With --avoid=snprintf, we drop support for systems (many!) with +# losing snprintf but pull in about 30 fewer files +# With the current gnulib and gettext-0.17, the following +# files are added to m4/ by both. But gnulib is stable enough +# and gettext-0.16.1 is new enough that they are identical. +# compiler-flags.m4 +# inttypes_h.m4 +# longlong.m4 +# size_max.m4 +# stdint_h.m4 +# wchar_t.m4 +# wint_t.m4 +# xsize.m4 + +# Note that if we don't exclude the snprintf module, there are two tests +# that have incompatible licenses, so we would have to exclude them. Even +# excluding those two test modules, find reports a total of 94 added files. +# Yes, snprintf has some heavy-duty dependents. +# --avoid=snprintf-tests +# --avoid=vasnprintf-tests + +avoid='--avoid=snprintf' + +avoid=' + --avoid=snprintf-tests + --avoid=vasnprintf-tests +' + +$gnulib_tool \ + --lgpl \ + $avoid \ + --avoid=snprintf-tests \ + --avoid=vasnprintf-tests \ + --with-tests \ + --m4-base=gnulib/m4 \ + --source-base=gnulib/lib \ + --tests-base=tests/gnulib \ + --import physmem getaddrinfo diff --git a/configure.in b/configure.in index 6cd7fe2..0cc8b6d 100644 --- a/configure.in +++ b/configure.in @@ -28,11 +28,15 @@ AVAHI_REQUIRED="0.6.0" dnl Checks for C compiler. AC_PROG_CC -AM_PROG_CC_STDC -AC_C_CONST AC_PROG_INSTALL AC_PROG_CPP +gl_EARLY +gl_INIT + +AM_PROG_CC_STDC +AC_C_CONST + dnl Make sure we have an ANSI compiler AM_C_PROTOTYPES test "x$U" != "x" && AC_MSG_ERROR(Compiler not ANSI compliant) @@ -555,11 +559,12 @@ cp COPYING.LIB COPYING AC_OUTPUT(Makefile src/Makefile include/Makefile docs/Makefile \ docs/examples/Makefile docs/devhelp/Makefile \ docs/examples/python/Makefile \ + gnulib/lib/Makefile tests/gnulib/Makefile \ libvirt.pc libvirt.spec \ po/Makefile.in scripts/Makefile \ include/libvirt/Makefile include/libvirt/libvirt.h \ python/Makefile python/tests/Makefile \ - qemud/Makefile m4/Makefile \ + qemud/Makefile \ tests/Makefile proxy/Makefile \ tests/xml2sexprdata/Makefile \ tests/sexpr2xmldata/Makefile \ diff --git a/m4/Makefile.am b/m4/Makefile.am deleted file mode 100644 index 188b2fe..0000000 --- a/m4/Makefile.am +++ /dev/null @@ -1,3 +0,0 @@ - -EXTRA_DIST = compiler-flags.m4 - diff --git a/qemud/Makefile.am b/qemud/Makefile.am index 1737176..7e3b694 100644 --- a/qemud/Makefile.am +++ b/qemud/Makefile.am @@ -27,6 +27,7 @@ libvirtd_SOURCES = \ #-D_XOPEN_SOURCE=600 -D_XOPEN_SOURCE_EXTENDED=1 -D_POSIX_C_SOURCE=199506L libvirtd_CFLAGS = \ + -I$(top_srcdir)/gnulib/lib -I../gnulib/lib \ -I$(top_srcdir)/include -I$(top_builddir)/include \ $(LIBXML_CFLAGS) $(GNUTLS_CFLAGS) \ $(WARN_CFLAGS) -DLOCAL_STATE_DIR="\"$(localstatedir)\"" \ @@ -37,7 +38,7 @@ libvirtd_CFLAGS = \ libvirtd_LDFLAGS = $(WARN_CFLAGS) $(LIBXML_LIBS) $(GNUTLS_LIBS) libvirtd_DEPENDENCIES = ../src/libvirt.la -libvirtd_LDADD = ../src/libvirt.la +libvirtd_LDADD = ../src/libvirt.la ../gnulib/lib/libgnu.la if HAVE_AVAHI libvirtd_SOURCES += mdns.c mdns.h diff --git a/qemud/qemud.c b/qemud/qemud.c index f88ed42..caccd29 100644 --- a/qemud/qemud.c +++ b/qemud/qemud.c @@ -53,6 +53,7 @@ #include <libvirt/virterror.h> #include "internal.h" +#include "getaddrinfo.h" #include "../src/internal.h" #include "../src/remote_internal.h" #include "../src/conf.h" diff --git a/src/Makefile.am b/src/Makefile.am index 52ffbaf..f9a2308 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -1,6 +1,8 @@ ## Process this file with automake to produce Makefile.in -INCLUDES = -I$(top_builddir)/include \ +INCLUDES = \ + -I$(top_srcdir)/gnulib/lib -I../gnulib/lib \ + -I../include \ -I@top_srcdir@/include \ -I@top_srcdir@/qemud \ $(LIBXML_CFLAGS) \ @@ -14,7 +16,7 @@ INCLUDES = -I$(top_builddir)/include \ $(WARN_CFLAGS) \ $(LIBVIRT_FEATURES) DEPS = libvirt.la -LDADDS = @STATIC_BINARIES@ $(WARN_CFLAGS) libvirt.la +LDADDS = @STATIC_BINARIES@ $(WARN_CFLAGS) libvirt.la ../gnulib/lib/libgnu.la VIRSH_LIBS = @VIRSH_LIBS@ confdir = $(sysconfdir)/libvirt/ @@ -60,7 +62,7 @@ SERVER_SOURCES = \ libvirt_la_SOURCES = $(CLIENT_SOURCES) $(SERVER_SOURCES) libvirt_la_LIBADD = $(LIBXML_LIBS) $(GNUTLS_LIBS) $(LTLIBOBJS) \ - @CYGWIN_EXTRA_LIBADD@ + @CYGWIN_EXTRA_LIBADD@ ../gnulib/lib/libgnu.la libvirt_la_LDFLAGS = -Wl,--version-script=$(srcdir)/libvirt_sym.version \ -version-info @LIBVIRT_VERSION_INFO@ \ $(COVERAGE_CFLAGS:-f%=-Wc,-f%) \ diff --git a/src/nodeinfo.c b/src/nodeinfo.c index a0a26eb..2ef49cb 100644 --- a/src/nodeinfo.c +++ b/src/nodeinfo.c @@ -29,14 +29,14 @@ #include <ctype.h> #include "nodeinfo.h" +#include "physmem.h" #ifdef __linux__ -#define MEMINFO_PATH "/proc/meminfo" #define CPUINFO_PATH "/proc/cpuinfo" /* NB, these are not static as we need to call them from testsuite */ -int linuxNodeInfoCPUPopulate(virConnectPtr conn, FILE *cpuinfo, virNodeInfoPtr nodeinfo); -int linuxNodeInfoMemPopulate(virConnectPtr conn, FILE *meminfo, virNodeInfoPtr nodeinfo); +int linuxNodeInfoCPUPopulate(virConnectPtr conn, FILE *cpuinfo, + virNodeInfoPtr nodeinfo); int linuxNodeInfoCPUPopulate(virConnectPtr conn, FILE *cpuinfo, virNodeInfoPtr nodeinfo) { char line[1024]; @@ -114,44 +114,11 @@ int linuxNodeInfoCPUPopulate(virConnectPtr conn, FILE *cpuinfo, virNodeInfoPtr n return 0; } - -int linuxNodeInfoMemPopulate(virConnectPtr conn, FILE *meminfo, - virNodeInfoPtr nodeinfo) { - char line[1024]; - - nodeinfo->memory = 0; - - while (fgets(line, sizeof(line), meminfo) != NULL) { - if (STREQLEN(line, "MemTotal:", 9)) { - char *p; - unsigned int ui; - if (xstrtol_ui(line + 10, &p, 10, &ui) == 0 - && (*p == '\0' || isspace(*p))) { - nodeinfo->memory = ui; - break; - } - } - } - if (!nodeinfo->memory) { - __virRaiseError(conn, NULL, NULL, 0, VIR_ERR_INTERNAL_ERROR, - VIR_ERR_ERROR, NULL, NULL, NULL, 0, 0, - "no memory found"); - return -1; - } - - return 0; -} - - #endif int virNodeInfoPopulate(virConnectPtr conn, virNodeInfoPtr nodeinfo) { struct utsname info; -#ifdef __linux__ - int ret; - FILE *cpuinfo, *meminfo; -#endif if (uname(&info) < 0) { __virRaiseError(conn, NULL, NULL, 0, VIR_ERR_INTERNAL_ERROR, @@ -164,7 +131,9 @@ int virNodeInfoPopulate(virConnectPtr conn, nodeinfo->model[sizeof(nodeinfo->model)-1] = '\0'; #ifdef __linux__ - cpuinfo = fopen(CPUINFO_PATH, "r"); + { + int ret; + FILE *cpuinfo = fopen(CPUINFO_PATH, "r"); if (!cpuinfo) { __virRaiseError(conn, NULL, NULL, 0, VIR_ERR_INTERNAL_ERROR, VIR_ERR_ERROR, NULL, NULL, NULL, 0, 0, @@ -176,17 +145,11 @@ int virNodeInfoPopulate(virConnectPtr conn, if (ret < 0) return -1; - meminfo = fopen(MEMINFO_PATH, "r"); - if (!meminfo) { - __virRaiseError(conn, NULL, NULL, 0, VIR_ERR_INTERNAL_ERROR, - VIR_ERR_ERROR, NULL, NULL, NULL, 0, 0, - "cannot open %s %s", MEMINFO_PATH, strerror(errno)); - return -1; - } - ret = linuxNodeInfoMemPopulate(conn, meminfo, nodeinfo); - fclose(meminfo); + /* Convert to KB. */ + nodeinfo->memory = physmem_total () / 1024; return ret; + } #else /* XXX Solaris will need an impl later if they port QEMU driver */ __virRaiseError(conn, NULL, NULL, 0, VIR_ERR_INTERNAL_ERROR, diff --git a/src/remote_internal.c b/src/remote_internal.c index a8227f3..275405a 100644 --- a/src/remote_internal.c +++ b/src/remote_internal.c @@ -52,6 +52,7 @@ #include "internal.h" #include "driver.h" +#include "getaddrinfo.h" #include "remote_internal.h" #include "remote_protocol.h" diff --git a/src/test.c b/src/test.c index 010ea15..bab280f 100644 --- a/src/test.c +++ b/src/test.c @@ -25,8 +25,6 @@ #ifdef WITH_TEST -#define _GNU_SOURCE /* for asprintf */ - #include <stdio.h> #include <string.h> #include <sys/time.h> diff --git a/tests/Makefile.am b/tests/Makefile.am index 512162b..8220e1b 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -11,6 +11,7 @@ SUBDIRS = virshdata confdata sexpr2xmldata xml2sexprdata xmconfigdata xencapsdat LIBVIRT = $(wildcard $(top_builddir)/src/.libs/libvirt_la-*.o) INCLUDES = \ + -I$(top_srcdir)/gnulib/lib -I../gnulib/lib \ -I$(top_builddir)/include \ -I$(top_builddir)/src \ -I$(top_srcdir)/include \ @@ -29,6 +30,7 @@ LDADDS = \ $(GNUTLS_LIBS) \ $(WARN_CFLAGS) \ $(LIBVIRT) \ + ../gnulib/lib/libgnu.la \ $(COVERAGE_LDFLAGS) EXTRA_DIST = \ diff --git a/tests/nodeinfodata/linux-nodeinfo-1.txt b/tests/nodeinfodata/linux-nodeinfo-1.txt index 1a38ad1..e52e20a 100644 --- a/tests/nodeinfodata/linux-nodeinfo-1.txt +++ b/tests/nodeinfodata/linux-nodeinfo-1.txt @@ -1 +1 @@ -CPUs: 2, MHz: 2800, Nodes: 1, Sockets: 1, Cores: 2, Threads: 1, Memory: 2053960 +CPUs: 2, MHz: 2800, Nodes: 1, Sockets: 1, Cores: 2, Threads: 1 diff --git a/tests/nodeinfodata/linux-nodeinfo-2.txt b/tests/nodeinfodata/linux-nodeinfo-2.txt index 1c31a0c..12e819b 100644 --- a/tests/nodeinfodata/linux-nodeinfo-2.txt +++ b/tests/nodeinfodata/linux-nodeinfo-2.txt @@ -1 +1 @@ -CPUs: 2, MHz: 2211, Nodes: 1, Sockets: 1, Cores: 2, Threads: 1, Memory: 4059540 +CPUs: 2, MHz: 2211, Nodes: 1, Sockets: 1, Cores: 2, Threads: 1 diff --git a/tests/nodeinfodata/linux-nodeinfo-3.txt b/tests/nodeinfodata/linux-nodeinfo-3.txt index e2cc841..d285781 100644 --- a/tests/nodeinfodata/linux-nodeinfo-3.txt +++ b/tests/nodeinfodata/linux-nodeinfo-3.txt @@ -1 +1 @@ -CPUs: 4, MHz: 1595, Nodes: 1, Sockets: 2, Cores: 2, Threads: 1, Memory: 4059272 +CPUs: 4, MHz: 1595, Nodes: 1, Sockets: 2, Cores: 2, Threads: 1 diff --git a/tests/nodeinfodata/linux-nodeinfo-4.txt b/tests/nodeinfodata/linux-nodeinfo-4.txt index 2c75ea3..991d4f9 100644 --- a/tests/nodeinfodata/linux-nodeinfo-4.txt +++ b/tests/nodeinfodata/linux-nodeinfo-4.txt @@ -1 +1 @@ -CPUs: 4, MHz: 1000, Nodes: 1, Sockets: 1, Cores: 4, Threads: 1, Memory: 4059272 +CPUs: 4, MHz: 1000, Nodes: 1, Sockets: 1, Cores: 4, Threads: 1 diff --git a/tests/nodeinfodata/linux-nodeinfo-5.txt b/tests/nodeinfodata/linux-nodeinfo-5.txt index 01fee52..dce7ada 100644 --- a/tests/nodeinfodata/linux-nodeinfo-5.txt +++ b/tests/nodeinfodata/linux-nodeinfo-5.txt @@ -1 +1 @@ -CPUs: 4, MHz: 2814, Nodes: 1, Sockets: 2, Cores: 2, Threads: 1, Memory: 4059272 +CPUs: 4, MHz: 2814, Nodes: 1, Sockets: 2, Cores: 2, Threads: 1 diff --git a/tests/nodeinfodata/linux-nodeinfo-6.txt b/tests/nodeinfodata/linux-nodeinfo-6.txt index a7a2cfe..75cdaa9 100644 --- a/tests/nodeinfodata/linux-nodeinfo-6.txt +++ b/tests/nodeinfodata/linux-nodeinfo-6.txt @@ -1 +1 @@ -CPUs: 4, MHz: 1000, Nodes: 1, Sockets: 2, Cores: 2, Threads: 1, Memory: 4059272 +CPUs: 4, MHz: 1000, Nodes: 1, Sockets: 2, Cores: 2, Threads: 1 diff --git a/tests/nodeinfotest.c b/tests/nodeinfotest.c index 7275cc3..fb563b5 100644 --- a/tests/nodeinfotest.c +++ b/tests/nodeinfotest.c @@ -21,14 +21,13 @@ static char *abs_top_srcdir; #ifdef __linux__ extern int linuxNodeInfoCPUPopulate(virConnectPtr conn, FILE *cpuinfo, virNodeInfoPtr nodeinfo); -extern int linuxNodeInfoMemPopulate(virConnectPtr conn, FILE *meminfo, virNodeInfoPtr nodeinfo); -static int linuxTestCompareFiles(const char *cpuinfofile, const char *meminfofile, const char *outputfile) { +static int linuxTestCompareFiles(const char *cpuinfofile, const char *outputfile) { char actualData[MAX_FILE]; char expectData[MAX_FILE]; char *expect = &expectData[0]; virNodeInfo nodeinfo; - FILE *cpuinfo, *meminfo; + FILE *cpuinfo; if (virtTestLoadFile(outputfile, &expect, MAX_FILE) < 0) return -1; @@ -42,19 +41,10 @@ static int linuxTestCompareFiles(const char *cpuinfofile, const char *meminfofil } fclose(cpuinfo); - meminfo = fopen(meminfofile, "r"); - if (!meminfo) - return -1; - if (linuxNodeInfoMemPopulate(NULL, meminfo, &nodeinfo) < 0) { - fclose(meminfo); - return -1; - } - fclose(meminfo); - snprintf(actualData, MAX_FILE, - "CPUs: %u, MHz: %u, Nodes: %u, Sockets: %u, Cores: %u, Threads: %u, Memory: %lu\n", + "CPUs: %u, MHz: %u, Nodes: %u, Sockets: %u, Cores: %u, Threads: %u\n", nodeinfo.cpus, nodeinfo.mhz, nodeinfo.nodes, nodeinfo.sockets, - nodeinfo.cores, nodeinfo.threads, nodeinfo.memory); + nodeinfo.cores, nodeinfo.threads); if (STRNEQ(actualData, expectData)) { if (getenv("DEBUG_TESTS")) { @@ -70,15 +60,12 @@ static int linuxTestCompareFiles(const char *cpuinfofile, const char *meminfofil static int linuxTestNodeInfo(const void *data) { char cpuinfo[PATH_MAX]; - char meminfo[PATH_MAX]; char output[PATH_MAX]; snprintf(cpuinfo, PATH_MAX, "%s/tests/nodeinfodata/linux-%s.cpuinfo", abs_top_srcdir, (const char*)data); - snprintf(meminfo, PATH_MAX, "%s/tests/nodeinfodata/linux-%s.meminfo", - abs_top_srcdir, (const char*)data); snprintf(output, PATH_MAX, "%s/tests/nodeinfodata/linux-%s.txt", abs_top_srcdir, (const char*)data); - return linuxTestCompareFiles(cpuinfo, meminfo, output); + return linuxTestCompareFiles(cpuinfo, output); } #endif -- 1.5.3.6.950.g92b7b