diff options
Diffstat (limited to 'lib/getloadavg.m4')
| -rw-r--r-- | lib/getloadavg.m4 | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/lib/getloadavg.m4 b/lib/getloadavg.m4 new file mode 100644 index 00000000..ff8cf309 --- /dev/null +++ b/lib/getloadavg.m4 @@ -0,0 +1,108 @@ +#serial 9 + +# A replacement for autoconf's macro by the same name. This version +# accepts an optional argument specifying the name of the $srcdir-relative +# directory in which the file getloadavg.c may be found. It is unusual +# (but justified, imho) that this file is required at ./configure time. + +undefine([AC_FUNC_GETLOADAVG]) + +# AC_FUNC_GETLOADAVG +# ------------------ +AC_DEFUN([AC_FUNC_GETLOADAVG], +[ac_have_func=no # yes means we've found a way to get the load average. + +AC_CHECK_HEADERS(locale.h unistd.h mach/mach.h fcntl.h) +AC_CHECK_FUNCS(setlocale) + +# By default, expect to find getloadavg.c in $srcdir/. +ac_lib_dir_getloadavg=$srcdir +# But if there's an argument, DIR, expect to find getloadavg.c in $srcdir/DIR. +m4_ifval([$1], [ac_lib_dir_getloadavg=$srcdir/$1]) +# Make sure getloadavg.c is where it belongs, at ./configure-time. +test -f $ac_lib_dir_getloadavg/getloadavg.c \ + || AC_MSG_ERROR([getloadavg.c is not in $ac_lib_dir_getloadavg]) +# FIXME: Add an autoconf-time test, too? + +ac_save_LIBS=$LIBS + +# Check for getloadavg, but be sure not to touch the cache variable. +(AC_CHECK_FUNC(getloadavg, exit 0, exit 1)) && ac_have_func=yes + +# On HPUX9, an unprivileged user can get load averages through this function. +AC_CHECK_FUNCS(pstat_getdynamic) + +# Solaris has libkstat which does not require root. +AC_CHECK_LIB(kstat, kstat_open) +test $ac_cv_lib_kstat_kstat_open = yes && ac_have_func=yes + +# Some systems with -lutil have (and need) -lkvm as well, some do not. +# On Solaris, -lkvm requires nlist from -lelf, so check that first +# to get the right answer into the cache. +# For kstat on solaris, we need libelf to force the definition of SVR4 below. +if test $ac_have_func = no; then + AC_CHECK_LIB(elf, elf_begin, LIBS="-lelf $LIBS") +fi +if test $ac_have_func = no; then + AC_CHECK_LIB(kvm, kvm_open, LIBS="-lkvm $LIBS") + # Check for the 4.4BSD definition of getloadavg. + AC_CHECK_LIB(util, getloadavg, + [LIBS="-lutil $LIBS" ac_have_func=yes ac_cv_func_getloadavg_setgid=yes]) +fi + +if test $ac_have_func = no; then + # There is a commonly available library for RS/6000 AIX. + # Since it is not a standard part of AIX, it might be installed locally. + ac_getloadavg_LIBS=$LIBS + LIBS="-L/usr/local/lib $LIBS" + AC_CHECK_LIB(getloadavg, getloadavg, + [LIBS="-lgetloadavg $LIBS"], [LIBS=$ac_getloadavg_LIBS]) +fi + +# Make sure it is really in the library, if we think we found it, +# otherwise set up the replacement function. +AC_CHECK_FUNCS(getloadavg, [], + [_AC_LIBOBJ_GETLOADAVG]) + +# Some definitions of getloadavg require that the program be installed setgid. +AC_CACHE_CHECK(whether getloadavg requires setgid, + ac_cv_func_getloadavg_setgid, +[AC_EGREP_CPP([Yowza Am I SETGID yet], +[#include "$ac_lib_dir_getloadavg/getloadavg.c" +#ifdef LDAV_PRIVILEGED +Yowza Am I SETGID yet +@%:@endif], + ac_cv_func_getloadavg_setgid=yes, + ac_cv_func_getloadavg_setgid=no)]) +if test $ac_cv_func_getloadavg_setgid = yes; then + NEED_SETGID=true + AC_DEFINE(GETLOADAVG_PRIVILEGED, 1, + [Define if the `getloadavg' function needs to be run setuid + or setgid.]) +else + NEED_SETGID=false +fi +AC_SUBST(NEED_SETGID)dnl + +if test $ac_cv_func_getloadavg_setgid = yes; then + AC_CACHE_CHECK(group of /dev/kmem, ac_cv_group_kmem, +[ # On Solaris, /dev/kmem is a symlink. Get info on the real file. + ac_ls_output=`ls -lgL /dev/kmem 2>/dev/null` + # If we got an error (system does not support symlinks), try without -L. + test -z "$ac_ls_output" && ac_ls_output=`ls -lg /dev/kmem` + ac_cv_group_kmem=`echo $ac_ls_output \ + | sed -ne ['s/[ ][ ]*/ /g; + s/^.[sSrwx-]* *[0-9]* *\([^0-9]*\) *.*/\1/; + / /s/.* //;p;']` +]) + AC_SUBST(KMEM_GROUP, $ac_cv_group_kmem)dnl +fi +if test "x$ac_save_LIBS" = x; then + GETLOADAVG_LIBS=$LIBS +else + GETLOADAVG_LIBS=`echo "$LIBS" | sed "s!$ac_save_LIBS!!"` +fi +LIBS=$ac_save_LIBS + +AC_SUBST(GETLOADAVG_LIBS)dnl +])# AC_FUNC_GETLOADAVG |