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-rw-r--r--getloadavg.m4108
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1#serial 9
2
3# A replacement for autoconf's macro by the same name. This version
4# accepts an optional argument specifying the name of the $srcdir-relative
5# directory in which the file getloadavg.c may be found. It is unusual
6# (but justified, imho) that this file is required at ./configure time.
7
8undefine([AC_FUNC_GETLOADAVG])
9
10# AC_FUNC_GETLOADAVG
11# ------------------
12AC_DEFUN([AC_FUNC_GETLOADAVG],
13[ac_have_func=no # yes means we've found a way to get the load average.
14
15AC_CHECK_HEADERS(locale.h unistd.h mach/mach.h fcntl.h)
16AC_CHECK_FUNCS(setlocale)
17
18# By default, expect to find getloadavg.c in $srcdir/.
19ac_lib_dir_getloadavg=$srcdir
20# But if there's an argument, DIR, expect to find getloadavg.c in $srcdir/DIR.
21m4_ifval([$1], [ac_lib_dir_getloadavg=$srcdir/$1])
22# Make sure getloadavg.c is where it belongs, at ./configure-time.
23test -f $ac_lib_dir_getloadavg/getloadavg.c \
24 || AC_MSG_ERROR([getloadavg.c is not in $ac_lib_dir_getloadavg])
25# FIXME: Add an autoconf-time test, too?
26
27ac_save_LIBS=$LIBS
28
29# Check for getloadavg, but be sure not to touch the cache variable.
30(AC_CHECK_FUNC(getloadavg, exit 0, exit 1)) && ac_have_func=yes
31
32# On HPUX9, an unprivileged user can get load averages through this function.
33AC_CHECK_FUNCS(pstat_getdynamic)
34
35# Solaris has libkstat which does not require root.
36AC_CHECK_LIB(kstat, kstat_open)
37test $ac_cv_lib_kstat_kstat_open = yes && ac_have_func=yes
38
39# Some systems with -lutil have (and need) -lkvm as well, some do not.
40# On Solaris, -lkvm requires nlist from -lelf, so check that first
41# to get the right answer into the cache.
42# For kstat on solaris, we need libelf to force the definition of SVR4 below.
43if test $ac_have_func = no; then
44 AC_CHECK_LIB(elf, elf_begin, LIBS="-lelf $LIBS")
45fi
46if test $ac_have_func = no; then
47 AC_CHECK_LIB(kvm, kvm_open, LIBS="-lkvm $LIBS")
48 # Check for the 4.4BSD definition of getloadavg.
49 AC_CHECK_LIB(util, getloadavg,
50 [LIBS="-lutil $LIBS" ac_have_func=yes ac_cv_func_getloadavg_setgid=yes])
51fi
52
53if test $ac_have_func = no; then
54 # There is a commonly available library for RS/6000 AIX.
55 # Since it is not a standard part of AIX, it might be installed locally.
56 ac_getloadavg_LIBS=$LIBS
57 LIBS="-L/usr/local/lib $LIBS"
58 AC_CHECK_LIB(getloadavg, getloadavg,
59 [LIBS="-lgetloadavg $LIBS"], [LIBS=$ac_getloadavg_LIBS])
60fi
61
62# Make sure it is really in the library, if we think we found it,
63# otherwise set up the replacement function.
64AC_CHECK_FUNCS(getloadavg, [],
65 [_AC_LIBOBJ_GETLOADAVG])
66
67# Some definitions of getloadavg require that the program be installed setgid.
68AC_CACHE_CHECK(whether getloadavg requires setgid,
69 ac_cv_func_getloadavg_setgid,
70[AC_EGREP_CPP([Yowza Am I SETGID yet],
71[#include "$ac_lib_dir_getloadavg/getloadavg.c"
72#ifdef LDAV_PRIVILEGED
73Yowza Am I SETGID yet
74@%:@endif],
75 ac_cv_func_getloadavg_setgid=yes,
76 ac_cv_func_getloadavg_setgid=no)])
77if test $ac_cv_func_getloadavg_setgid = yes; then
78 NEED_SETGID=true
79 AC_DEFINE(GETLOADAVG_PRIVILEGED, 1,
80 [Define if the `getloadavg' function needs to be run setuid
81 or setgid.])
82else
83 NEED_SETGID=false
84fi
85AC_SUBST(NEED_SETGID)dnl
86
87if test $ac_cv_func_getloadavg_setgid = yes; then
88 AC_CACHE_CHECK(group of /dev/kmem, ac_cv_group_kmem,
89[ # On Solaris, /dev/kmem is a symlink. Get info on the real file.
90 ac_ls_output=`ls -lgL /dev/kmem 2>/dev/null`
91 # If we got an error (system does not support symlinks), try without -L.
92 test -z "$ac_ls_output" && ac_ls_output=`ls -lg /dev/kmem`
93 ac_cv_group_kmem=`echo $ac_ls_output \
94 | sed -ne ['s/[ ][ ]*/ /g;
95 s/^.[sSrwx-]* *[0-9]* *\([^0-9]*\) *.*/\1/;
96 / /s/.* //;p;']`
97])
98 AC_SUBST(KMEM_GROUP, $ac_cv_group_kmem)dnl
99fi
100if test "x$ac_save_LIBS" = x; then
101 GETLOADAVG_LIBS=$LIBS
102else
103 GETLOADAVG_LIBS=`echo "$LIBS" | sed "s!$ac_save_LIBS!!"`
104fi
105LIBS=$ac_save_LIBS
106
107AC_SUBST(GETLOADAVG_LIBS)dnl
108])# AC_FUNC_GETLOADAVG