[deliverable/binutils-gdb.git] / readline / examples / rlfe / configure.in

dnl Process this file with autoconf to produce a configure script.

AC_INIT(rlfe.c)
AC_CONFIG_HEADER(config.h)
VERSION=0.4
AC_SUBST(VERSION)

dnl
dnl Define some useful macros
dnl
AC_DEFUN([AC_PROGRAM_SOURCE],
[AC_REQUIRE([AC_PROG_CPP])AC_PROVIDE([$0])cat > conftest.c <<EOF
#include "confdefs.h"
[$1]
_CUT_HERE_
[$2]
EOF
eval "$ac_cpp conftest.c 2>&5 | sed -e '1,/_CUT_HERE_/d' -e 's/ //g' > conftest.out"
. ./conftest.out
rm -f conftest*
])dnl
dnl
define(AC_NOTE,
[echo "$1" 1>&AC_FD_MSG
])dnl

old_CFLAGS="$CFLAGS"
AC_PROG_CC
AC_PROG_CPP
AC_PROG_GCC_TRADITIONAL
AC_ISC_POSIX

AC_TRY_RUN(main(){exit(0);},,[
if test $CC != cc ; then
AC_NOTE(Your $CC failed - restarting with CC=cc)
AC_NOTE()
CC=cc
export CC
exec $0 $configure_args
fi
])

AC_TRY_RUN(main(){exit(0);},,
exec 5>&2
eval $ac_link
AC_NOTE(CC=$CC; CFLAGS=$CFLAGS; LIBS=$LIBS;)
AC_NOTE($ac_compile)
AC_MSG_ERROR(Can't run the compiler - sorry))

AC_TRY_RUN([
main()
{
  int __something_strange_();
  __something_strange_(0);
}
],AC_MSG_ERROR(Your compiler does not set the exit status - sorry))

AC_PROG_AWK

if test -f etc/toolcheck; then
AC_CHECKING(for buggy tools)
sh etc/toolcheck 1>&AC_FD_MSG
fi

dnl
dnl    ****  special unix variants  ****
dnl

AC_CHECKING(for System V)
AC_TRY_COMPILE(
[#include <sys/types.h>
#include <signal.h>
#include <fcntl.h>], [int x = SIGCHLD | FNDELAY;], , AC_DEFINE(SYSV))

AC_CHECKING(for Solaris 2.x)
AC_EGREP_CPP(yes,
[#if defined(SVR4) && defined(sun)
  yes
#endif
], LIBS="$LIBS -lsocket -lnsl -lkstat")

dnl
dnl    ****  select()  ****
dnl

AC_CHECKING(select)
AC_TRY_LINK(,[select(0, 0, 0, 0, 0);],, 
LIBS="$LIBS -lnet -lnsl"
AC_CHECKING(select with $LIBS)
AC_TRY_LINK(,[select(0, 0, 0, 0, 0);],, 
AC_MSG_ERROR(!!! no select - no screen))
)
dnl
dnl    ****  check the select implementation ****
dnl

AC_CHECKING(select return value)
AC_TRY_RUN([
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

char *nam = "/tmp/conftest$$";

#ifdef NAMEDPIPE

#ifndef O_NONBLOCK
#define O_NONBLOCK O_NDELAY
#endif
#ifndef S_IFIFO
#define S_IFIFO 0010000
#endif


main()
{
#ifdef FD_SET
  fd_set f;
#else
  int f;
#endif

#ifdef __FreeBSD__
/* From Andrew A. Chernov (ache@astral.msk.su):
 * opening RDWR fifo fails in BSD 4.4, but select return values are
 * right.
 */
  exit(0);
#endif
  (void)alarm(5);
#ifdef POSIX
  if (mkfifo(nam, 0777))
#else
  if (mknod(nam, S_IFIFO|0777, 0))
#endif
    exit(1);
  close(0);
  if (open(nam, O_RDWR | O_NONBLOCK))
    exit(1);
  if (write(0, "TEST", 4) == -1)
    exit(1);

#else

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>

main()
{
  int s1, s2, l;
  struct sockaddr_un a;
#ifdef FD_SET
  fd_set f;
#else
  int f;
#endif

  (void)alarm(5);
  if ((s1 = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
    exit(1);
  a.sun_family = AF_UNIX;
  strcpy(a.sun_path, nam);
  (void) unlink(nam);
  if (bind(s1, (struct sockaddr *) &a, strlen(nam)+2) == -1)
    exit(1);
  if (listen(s1, 2))
    exit(1);
  if (fork() == 0)
    {
      if ((s2 = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
	kill(getppid(), 3);
      (void)connect(s2, (struct sockaddr *)&a, strlen(nam) + 2);
      if (write(s2, "HELLO", 5) == -1)
	kill(getppid(), 3);
      exit(0);
    }
  l = sizeof(a);
  close(0);
  if (accept(s1, (struct sockaddr *)&a, &l))
    exit(1);
#endif


#ifdef FD_SET
  FD_SET(0, &f);
#else
  f = 1;
#endif
  if (select(1, &f, 0, 0, 0) == -1)
    exit(1);
  if (select(1, &f, &f, 0, 0) != 2)
    exit(1);
  exit(0);
}
],AC_NOTE(- select is ok),
AC_NOTE(- select can't count) AC_DEFINE(SELECT_BROKEN))

dnl
dnl    ****  termcap or terminfo  ****
dnl
AC_CHECKING(for tgetent)
AC_TRY_LINK(,tgetent((char *)0, (char *)0);,,
olibs="$LIBS"
LIBS="-lcurses $olibs"
AC_CHECKING(libcurses)
AC_TRY_LINK(,[
#ifdef __hpux
__sorry_hpux_libcurses_is_totally_broken_in_10_10();
#else
tgetent((char *)0, (char *)0);
#endif
],,
LIBS="-ltermcap $olibs"
AC_CHECKING(libtermcap)
AC_TRY_LINK(,tgetent((char *)0, (char *)0);,,
LIBS="-ltermlib $olibs"
AC_CHECKING(libtermlib)
AC_TRY_LINK(,tgetent((char *)0, (char *)0);,,
LIBS="-lncurses $olibs"
AC_CHECKING(libncurses)
AC_TRY_LINK(,tgetent((char *)0, (char *)0);,,
AC_MSG_ERROR(!!! no tgetent - no screen))))))

AC_TRY_RUN([
extern char *tgoto();
main()
{
 exit(strcmp(tgoto("%p1%d", 0, 1), "1") ? 0 : 1);
}], AC_NOTE(- you use the termcap database),
AC_NOTE(- you use the terminfo database) AC_DEFINE(TERMINFO))
AC_CHECKING(ospeed)
AC_TRY_LINK(extern short ospeed;,ospeed=5;,,AC_DEFINE(NEED_OSPEED))

dnl
dnl    ****  PTY specific things  ****
dnl
AC_CHECKING(for /dev/ptc)
if test -r /dev/ptc; then
AC_DEFINE(HAVE_DEV_PTC)
fi

AC_CHECKING(for SVR4 ptys)
sysvr4ptys=
if test -c /dev/ptmx ; then
AC_TRY_LINK([],[ptsname(0);grantpt(0);unlockpt(0);],[AC_DEFINE(HAVE_SVR4_PTYS)
sysvr4ptys=1])
fi

AC_CHECK_FUNCS(getpt)

dnl check for openpty()
if test -z "$sysvr4ptys"; then
AC_CHECK_FUNCS(openpty,,
[AC_CHECK_LIB(util,openpty, [AC_DEFINE(HAVE_OPENPTY)] [LIBS="$LIBS -lutil"])])
fi

AC_CHECKING(for ptyranges)
if test -d /dev/ptym ; then
pdir='/dev/ptym'
else
pdir='/dev'
fi
dnl SCO uses ptyp%d
AC_EGREP_CPP(yes,
[#ifdef M_UNIX
   yes;
#endif
], ptys=`echo /dev/ptyp??`, ptys=`echo $pdir/pty??`)
dnl if test -c /dev/ptyp19; then
dnl ptys=`echo /dev/ptyp??`
dnl else
dnl ptys=`echo $pdir/pty??`
dnl fi
if test "$ptys" != "$pdir/pty??" ; then
p0=`echo $ptys | tr ' ' '\012' | sed -e 's/^.*\(.\).$/\1/g' | sort -u | tr -d '\012'`
p1=`echo $ptys | tr ' ' '\012' | sed -e 's/^.*\(.\)$/\1/g'  | sort -u | tr -d '\012'`
AC_DEFINE_UNQUOTED(PTYRANGE0,"$p0")
AC_DEFINE_UNQUOTED(PTYRANGE1,"$p1")
fi

dnl    ****  pty mode/group handling ****
dnl
dnl support provided by Luke Mewburn <lm@rmit.edu.au>, 931222
AC_ARG_WITH(pty-mode, [  --with-pty-mode=mode    default mode for ptys], [ ptymode="${withval}" ])
AC_ARG_WITH(pty-group, [  --with-pty-group=group  default group for ptys], [ ptygrp="${withval}" ])
test -n "$ptymode" || ptymode=0620
if test -n "$ptygrp" ; then
AC_DEFINE_UNQUOTED(PTYMODE, $ptymode)
AC_DEFINE_UNQUOTED(PTYGROUP,$ptygrp)
else

AC_CHECKING(default tty permissions/group)
rm -f conftest_grp
AC_TRY_RUN([
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
main()
{
  struct stat sb;
  char *x,*ttyname();
  int om, m;
  FILE *fp;

  if (!(x = ttyname(0))) exit(1);
  if (stat(x, &sb)) exit(1);
  om = sb.st_mode;
  if (om & 002) exit(0);
  m = system("mesg y");
  if (m == -1 || m == 127) exit(1);
  if (stat(x, &sb)) exit(1);
  m = sb.st_mode;
  if (chmod(x, om)) exit(1);
  if (m & 002) exit(0);
  if (sb.st_gid == getgid()) exit(1);
  if (!(fp=fopen("conftest_grp", "w")))
    exit(1);
  fprintf(fp, "%d\n", sb.st_gid);
  fclose(fp);
  exit(0);
}
],[
    if test -f conftest_grp; then
	ptygrp=`cat conftest_grp`
	AC_NOTE([- pty mode: $ptymode, group: $ptygrp])
	AC_DEFINE_UNQUOTED(PTYMODE, $ptymode)
	AC_DEFINE_UNQUOTED(PTYGROUP,$ptygrp)
    else
	AC_NOTE(- ptys are world accessable)
    fi
],[
    WRITEPATH=''
    XTERMPATH=''
    AC_PATH_PROG(WRITEPATH, write)
    AC_PATH_PROG(XTERMPATH, xterm)
    found=
    if test -n "$WRITEPATH$XTERMPATH"; then
      findfollow=
      lsfollow=
      found=`find $WRITEPATH $XTERMPATH -follow -print 2>/dev/null`
      if test -n "$found"; then
	findfollow=-follow
	lsfollow=L
      fi
      if test -n "$XTERMPATH"; then
	ptygrpn=`ls -l$lsfollow $XTERMPATH | sed -n -e 1p | $AWK '{print $4}'`
	if test tty != "$ptygrpn"; then
	  XTERMPATH=
	fi
      fi
    fi
    if test -n "$WRITEPATH$XTERMPATH"; then
      found=`find $WRITEPATH $XTERMPATH $findfollow -perm -2000 -print` 
      if test -n "$found"; then
	ptygrp=`ls -ln$lsfollow $found | sed -n -e 1p | $AWK '{print $4}'`
	AC_NOTE([- pty mode: $ptymode, group: $ptygrp])
	AC_DEFINE_UNQUOTED(PTYMODE, $ptymode)
	AC_DEFINE_UNQUOTED(PTYGROUP,$ptygrp)
      else
	AC_NOTE(- ptys are world accessable)
      fi
    else
      AC_NOTE(- can't determine - assume ptys are world accessable)
    fi
  ]
)
rm -f conftest_grp
fi

dnl
dnl    ****  signal handling  ****
dnl
if test -n "$posix" ; then

dnl POSIX has reliable signals with void return type.
AC_NOTE(assuming posix signal definition)
AC_DEFINE(SIGVOID)

else

AC_CHECKING(return type of signal handlers)
AC_TRY_COMPILE(
[#include <sys/types.h>
#include <signal.h>
#ifdef signal
#undef signal
#endif
extern void (*signal ()) ();], [int i;], AC_DEFINE(SIGVOID))
AC_CHECKING(sigset)
AC_TRY_LINK([
#include <sys/types.h>
#include <signal.h>
],[
#ifdef SIGVOID
sigset(0, (void (*)())0);
#else
sigset(0, (int (*)())0);
#endif
], AC_DEFINE(USESIGSET))
AC_CHECKING(signal implementation)
AC_TRY_RUN([
#include <sys/types.h>
#include <signal.h>

#ifndef SIGCLD
#define SIGCLD SIGCHLD
#endif
#ifdef USESIGSET
#define signal sigset
#endif

int got;

#ifdef SIGVOID
void
#endif
hand()
{
  got++;
}

main()
{
  /* on hpux we use sigvec to get bsd signals */
#ifdef __hpux
  (void)signal(SIGCLD, hand);
  kill(getpid(), SIGCLD);
  kill(getpid(), SIGCLD);
  if (got < 2)
    exit(1);
#endif
  exit(0);
}
],,AC_DEFINE(SYSVSIGS))

fi

AC_CHECK_HEADERS(sys/stropts.h sys/wait.h sgtty.h sys/select.h)
AC_CHECK_HEADERS(term.h)

AC_OUTPUT(Makefile)
Commit	Line	Data
b585a9fa EZ	1	dnl Process this file with autoconf to produce a configure script.
	2
	3	AC_INIT(rlfe.c)
	4	AC_CONFIG_HEADER(config.h)
	5	VERSION=0.4
	6	AC_SUBST(VERSION)
	7
	8	dnl
	9	dnl Define some useful macros
	10	dnl
5bb4d8de	11	AC_DEFUN([AC_PROGRAM_SOURCE],
b585a9fa EZ	12	[AC_REQUIRE([AC_PROG_CPP])AC_PROVIDE([$0])cat > conftest.c <<EOF
	13	#include "confdefs.h"
	14	[$1]
	15	_CUT_HERE_
	16	[$2]
	17	EOF
	18	eval "$ac_cpp conftest.c 2>&5 \| sed -e '1,/_CUT_HERE_/d' -e 's/ //g' > conftest.out"
	19	. ./conftest.out
	20	rm -f conftest*
	21	])dnl
	22	dnl
	23	define(AC_NOTE,
	24	[echo "$1" 1>&AC_FD_MSG
	25	])dnl
	26
	27	old_CFLAGS="$CFLAGS"
	28	AC_PROG_CC
	29	AC_PROG_CPP
	30	AC_PROG_GCC_TRADITIONAL
	31	AC_ISC_POSIX
	32
	33	AC_TRY_RUN(main(){exit(0);},,[
	34	if test $CC != cc ; then
	35	AC_NOTE(Your $CC failed - restarting with CC=cc)
	36	AC_NOTE()
	37	CC=cc
	38	export CC
	39	exec $0 $configure_args
	40	fi
	41	])
	42
	43	AC_TRY_RUN(main(){exit(0);},,
	44	exec 5>&2
	45	eval $ac_link
	46	AC_NOTE(CC=$CC; CFLAGS=$CFLAGS; LIBS=$LIBS;)
	47	AC_NOTE($ac_compile)
	48	AC_MSG_ERROR(Can't run the compiler - sorry))
	49
	50	AC_TRY_RUN([
	51	main()
	52	{
	53	int __something_strange_();
	54	__something_strange_(0);
	55	}
	56	],AC_MSG_ERROR(Your compiler does not set the exit status - sorry))
	57
	58	AC_PROG_AWK
	59
	60	if test -f etc/toolcheck; then
	61	AC_CHECKING(for buggy tools)
	62	sh etc/toolcheck 1>&AC_FD_MSG
	63	fi
	64
	65	dnl
	66	dnl ** special unix variants **
	67	dnl
	68
	69	AC_CHECKING(for System V)
	70	AC_TRY_COMPILE(
	71	[#include <sys/types.h>
	72	#include <signal.h>
	73	#include <fcntl.h>], [int x = SIGCHLD \| FNDELAY;], , AC_DEFINE(SYSV))
	74
	75	AC_CHECKING(for Solaris 2.x)
76	AC_EGREP_CPP(yes,
77	[#if defined(SVR4) && defined(sun)
78	yes
79	#endif
80	], LIBS="$LIBS -lsocket -lnsl -lkstat")
81
82	dnl
83	dnl ** select() **
84	dnl
85
86	AC_CHECKING(select)
87	AC_TRY_LINK(,[select(0, 0, 0, 0, 0);],,
88	LIBS="$LIBS -lnet -lnsl"
89	AC_CHECKING(select with $LIBS)
90	AC_TRY_LINK(,[select(0, 0, 0, 0, 0);],,
91	AC_MSG_ERROR(!!! no select - no screen))
92	)
93	dnl
94	dnl ** check the select implementation **
95	dnl
96
97	AC_CHECKING(select return value)
98	AC_TRY_RUN([
99	#include <sys/types.h>
100	#include <sys/stat.h>
101	#include <fcntl.h>
102
103	char *nam = "/tmp/conftest$$";
104
105	#ifdef NAMEDPIPE
106
107	#ifndef O_NONBLOCK
108	#define O_NONBLOCK O_NDELAY
109	#endif
110	#ifndef S_IFIFO
111	#define S_IFIFO 0010000
112	#endif
113
114
115	main()
116	{
117	#ifdef FD_SET
118	fd_set f;
119	#else
120	int f;
121	#endif
122
123	#ifdef __FreeBSD__
124	/* From Andrew A. Chernov (ache@astral.msk.su):
125	* opening RDWR fifo fails in BSD 4.4, but select return values are
126	* right.
127	*/
128	exit(0);
129	#endif
130	(void)alarm(5);
131	#ifdef POSIX
132	if (mkfifo(nam, 0777))
133	#else
134	if (mknod(nam, S_IFIFO\|0777, 0))
135	#endif
136	exit(1);
137	close(0);
138	if (open(nam, O_RDWR \| O_NONBLOCK))
139	exit(1);
140	if (write(0, "TEST", 4) == -1)
141	exit(1);
142
143	#else
144
145	#include <sys/types.h>
146	#include <sys/socket.h>
147	#include <sys/un.h>
148
149	main()
150	{
151	int s1, s2, l;
152	struct sockaddr_un a;
153	#ifdef FD_SET
154	fd_set f;
155	#else
156	int f;
157	#endif
158
159	(void)alarm(5);
160	if ((s1 = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
161	exit(1);
162	a.sun_family = AF_UNIX;
163	strcpy(a.sun_path, nam);
164	(void) unlink(nam);
165	if (bind(s1, (struct sockaddr *) &a, strlen(nam)+2) == -1)
166	exit(1);
167	if (listen(s1, 2))
168	exit(1);
169	if (fork() == 0)
170	{
171	if ((s2 = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
172	kill(getppid(), 3);
173	(void)connect(s2, (struct sockaddr *)&a, strlen(nam) + 2);
174	if (write(s2, "HELLO", 5) == -1)
175	kill(getppid(), 3);
176	exit(0);
177	}
178	l = sizeof(a);
179	close(0);
180	if (accept(s1, (struct sockaddr *)&a, &l))
181	exit(1);
182	#endif
183
184
185	#ifdef FD_SET
186	FD_SET(0, &f);
187	#else
188	f = 1;
189	#endif
190	if (select(1, &f, 0, 0, 0) == -1)
191	exit(1);
192	if (select(1, &f, &f, 0, 0) != 2)
193	exit(1);
194	exit(0);
195	}
196	],AC_NOTE(- select is ok),
197	AC_NOTE(- select can't count) AC_DEFINE(SELECT_BROKEN))
198
199	dnl
200	dnl ** termcap or terminfo **
201	dnl
202	AC_CHECKING(for tgetent)
203	AC_TRY_LINK(,tgetent((char )0, (char )0);,,
204	olibs="$LIBS"
205	LIBS="-lcurses $olibs"
206	AC_CHECKING(libcurses)
207	AC_TRY_LINK(,[
208	#ifdef __hpux
209	__sorry_hpux_libcurses_is_totally_broken_in_10_10();
210	#else
211	tgetent((char )0, (char )0);
212	#endif
213	],,
214	LIBS="-ltermcap $olibs"
215	AC_CHECKING(libtermcap)
216	AC_TRY_LINK(,tgetent((char )0, (char )0);,,
217	LIBS="-ltermlib $olibs"
218	AC_CHECKING(libtermlib)
219	AC_TRY_LINK(,tgetent((char )0, (char )0);,,
220	LIBS="-lncurses $olibs"
221	AC_CHECKING(libncurses)
222	AC_TRY_LINK(,tgetent((char )0, (char )0);,,
223	AC_MSG_ERROR(!!! no tgetent - no screen))))))
224
225	AC_TRY_RUN([
4a11f206	226	extern char *tgoto();
b585a9fa EZ	227	main()
	228	{
	229	exit(strcmp(tgoto("%p1%d", 0, 1), "1") ? 0 : 1);
	230	}], AC_NOTE(- you use the termcap database),
	231	AC_NOTE(- you use the terminfo database) AC_DEFINE(TERMINFO))
	232	AC_CHECKING(ospeed)
	233	AC_TRY_LINK(extern short ospeed;,ospeed=5;,,AC_DEFINE(NEED_OSPEED))
	234
	235	dnl
	236	dnl ** PTY specific things **
	237	dnl
	238	AC_CHECKING(for /dev/ptc)
	239	if test -r /dev/ptc; then
	240	AC_DEFINE(HAVE_DEV_PTC)
	241	fi
	242
	243	AC_CHECKING(for SVR4 ptys)
	244	sysvr4ptys=
	245	if test -c /dev/ptmx ; then
	246	AC_TRY_LINK([],[ptsname(0);grantpt(0);unlockpt(0);],[AC_DEFINE(HAVE_SVR4_PTYS)
	247	sysvr4ptys=1])
	248	fi
	249
	250	AC_CHECK_FUNCS(getpt)
	251
	252	dnl check for openpty()
	253	if test -z "$sysvr4ptys"; then
	254	AC_CHECK_FUNCS(openpty,,
	255	[AC_CHECK_LIB(util,openpty, [AC_DEFINE(HAVE_OPENPTY)] [LIBS="$LIBS -lutil"])])
	256	fi
	257
	258	AC_CHECKING(for ptyranges)
	259	if test -d /dev/ptym ; then
	260	pdir='/dev/ptym'
	261	else
	262	pdir='/dev'
	263	fi
	264	dnl SCO uses ptyp%d
	265	AC_EGREP_CPP(yes,
	266	[#ifdef M_UNIX
	267	yes;
	268	#endif
	269	], ptys=`echo /dev/ptyp??`, ptys=`echo $pdir/pty??`)
	270	dnl if test -c /dev/ptyp19; then
	271	dnl ptys=`echo /dev/ptyp??`
	272	dnl else
	273	dnl ptys=`echo $pdir/pty??`
	274	dnl fi
	275	if test "$ptys" != "$pdir/pty??" ; then
	276	p0=`echo $ptys \| tr ' ' '\012' \| sed -e 's/^.*\(.\).$/\1/g' \| sort -u \| tr -d '\012'`
	277	p1=`echo $ptys \| tr ' ' '\012' \| sed -e 's/^.*\(.\)$/\1/g' \| sort -u \| tr -d '\012'`
	278	AC_DEFINE_UNQUOTED(PTYRANGE0,"$p0")
	279	AC_DEFINE_UNQUOTED(PTYRANGE1,"$p1")
	280	fi
	281
	282	dnl ** pty mode/group handling **
	283	dnl
	284	dnl support provided by Luke Mewburn <lm@rmit.edu.au>, 931222
	285	AC_ARG_WITH(pty-mode, [ --with-pty-mode=mode default mode for ptys], [ ptymode="${withval}" ])
	286	AC_ARG_WITH(pty-group, [ --with-pty-group=group default group for ptys], [ ptygrp="${withval}" ])
	287	test -n "$ptymode" \|\| ptymode=0620
	288	if test -n "$ptygrp" ; then
	289	AC_DEFINE_UNQUOTED(PTYMODE, $ptymode)
	290	AC_DEFINE_UNQUOTED(PTYGROUP,$ptygrp)
291	else
292
293	AC_CHECKING(default tty permissions/group)
294	rm -f conftest_grp
295	AC_TRY_RUN([
296	#include <sys/types.h>
297	#include <sys/stat.h>
298	#include <stdio.h>
299	main()
300	{
301	struct stat sb;
302	char x,ttyname();
303	int om, m;
304	FILE *fp;
305
306	if (!(x = ttyname(0))) exit(1);
307	if (stat(x, &sb)) exit(1);
308	om = sb.st_mode;
309	if (om & 002) exit(0);
310	m = system("mesg y");
311	if (m == -1 \|\| m == 127) exit(1);
312	if (stat(x, &sb)) exit(1);
313	m = sb.st_mode;
314	if (chmod(x, om)) exit(1);
315	if (m & 002) exit(0);
316	if (sb.st_gid == getgid()) exit(1);
317	if (!(fp=fopen("conftest_grp", "w")))
318	exit(1);
319	fprintf(fp, "%d\n", sb.st_gid);
320	fclose(fp);
321	exit(0);
322	}
323	],[
324	if test -f conftest_grp; then
325	ptygrp=`cat conftest_grp`
326	AC_NOTE([- pty mode: $ptymode, group: $ptygrp])
327	AC_DEFINE_UNQUOTED(PTYMODE, $ptymode)
328	AC_DEFINE_UNQUOTED(PTYGROUP,$ptygrp)
329	else
330	AC_NOTE(- ptys are world accessable)
331	fi
332	],[
333	WRITEPATH=''
334	XTERMPATH=''
335	AC_PATH_PROG(WRITEPATH, write)
336	AC_PATH_PROG(XTERMPATH, xterm)
337	found=
338	if test -n "$WRITEPATH$XTERMPATH"; then
339	findfollow=
340	lsfollow=
341	found=`find $WRITEPATH $XTERMPATH -follow -print 2>/dev/null`
342	if test -n "$found"; then
343	findfollow=-follow
344	lsfollow=L
345	fi
346	if test -n "$XTERMPATH"; then
347	ptygrpn=`ls -l$lsfollow $XTERMPATH \| sed -n -e 1p \| $AWK '{print $4}'`
348	if test tty != "$ptygrpn"; then
349	XTERMPATH=
350	fi
351	fi
352	fi
353	if test -n "$WRITEPATH$XTERMPATH"; then
354	found=`find $WRITEPATH $XTERMPATH $findfollow -perm -2000 -print`
355	if test -n "$found"; then
356	ptygrp=`ls -ln$lsfollow $found \| sed -n -e 1p \| $AWK '{print $4}'`
357	AC_NOTE([- pty mode: $ptymode, group: $ptygrp])
358	AC_DEFINE_UNQUOTED(PTYMODE, $ptymode)
359	AC_DEFINE_UNQUOTED(PTYGROUP,$ptygrp)
360	else
361	AC_NOTE(- ptys are world accessable)
362	fi
363	else
364	AC_NOTE(- can't determine - assume ptys are world accessable)
365	fi
366	]
367	)
368	rm -f conftest_grp
369	fi
370
371	dnl
372	dnl ** signal handling **
373	dnl
374	if test -n "$posix" ; then
375
376	dnl POSIX has reliable signals with void return type.
377	AC_NOTE(assuming posix signal definition)
378	AC_DEFINE(SIGVOID)
379
380	else
381
382	AC_CHECKING(return type of signal handlers)
383	AC_TRY_COMPILE(
384	[#include <sys/types.h>
385	#include <signal.h>
386	#ifdef signal
387	#undef signal
388	#endif
389	extern void (*signal ()) ();], [int i;], AC_DEFINE(SIGVOID))
390	AC_CHECKING(sigset)
391	AC_TRY_LINK([
392	#include <sys/types.h>
393	#include <signal.h>
394	],[
395	#ifdef SIGVOID
396	sigset(0, (void (*)())0);
397	#else
398	sigset(0, (int (*)())0);
399	#endif
400	], AC_DEFINE(USESIGSET))
401	AC_CHECKING(signal implementation)
402	AC_TRY_RUN([
403	#include <sys/types.h>
404	#include <signal.h>
405
406	#ifndef SIGCLD
407	#define SIGCLD SIGCHLD
408	#endif
409	#ifdef USESIGSET
410	#define signal sigset
411	#endif
412
413	int got;
414
415	#ifdef SIGVOID
416	void
417	#endif
418	hand()
419	{
420	got++;
421	}
422
423	main()
424	{
425	/* on hpux we use sigvec to get bsd signals */
426	#ifdef __hpux
427	(void)signal(SIGCLD, hand);
428	kill(getpid(), SIGCLD);
429	kill(getpid(), SIGCLD);
430	if (got < 2)
431	exit(1);
432	#endif
433	exit(0);
434	}
435	],,AC_DEFINE(SYSVSIGS))
436
437	fi
438
4a11f206 PP	439	AC_CHECK_HEADERS(sys/stropts.h sys/wait.h sgtty.h sys/select.h)
4a11f206 PP	440	AC_CHECK_HEADERS(term.h)
cc88a640	441
b585a9fa	442	AC_OUTPUT(Makefile)