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

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

m4_include([../../../config/override.m4])

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([
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)

AC_OUTPUT(Makefile)
Commit	Line	Data
b585a9fa EZ	1	dnl Process this file with autoconf to produce a configure script.
b585a9fa EZ	2
d6416cdc RW	3	m4_include([../../../config/override.m4])
d6416cdc RW	4
b585a9fa EZ	5	AC_INIT(rlfe.c)
	6	AC_CONFIG_HEADER(config.h)
	7	VERSION=0.4
	8	AC_SUBST(VERSION)
	9
	10	dnl
	11	dnl Define some useful macros
	12	dnl
5bb4d8de	13	AC_DEFUN([AC_PROGRAM_SOURCE],
b585a9fa EZ	14	[AC_REQUIRE([AC_PROG_CPP])AC_PROVIDE([$0])cat > conftest.c <<EOF
	15	#include "confdefs.h"
	16	[$1]
	17	_CUT_HERE_
	18	[$2]
	19	EOF
	20	eval "$ac_cpp conftest.c 2>&5 \| sed -e '1,/_CUT_HERE_/d' -e 's/ //g' > conftest.out"
	21	. ./conftest.out
	22	rm -f conftest*
	23	])dnl
	24	dnl
	25	define(AC_NOTE,
	26	[echo "$1" 1>&AC_FD_MSG
	27	])dnl
	28
	29	old_CFLAGS="$CFLAGS"
	30	AC_PROG_CC
	31	AC_PROG_CPP
	32	AC_PROG_GCC_TRADITIONAL
	33	AC_ISC_POSIX
	34
	35	AC_TRY_RUN(main(){exit(0);},,[
	36	if test $CC != cc ; then
	37	AC_NOTE(Your $CC failed - restarting with CC=cc)
	38	AC_NOTE()
	39	CC=cc
	40	export CC
	41	exec $0 $configure_args
	42	fi
	43	])
	44
	45	AC_TRY_RUN(main(){exit(0);},,
	46	exec 5>&2
	47	eval $ac_link
	48	AC_NOTE(CC=$CC; CFLAGS=$CFLAGS; LIBS=$LIBS;)
	49	AC_NOTE($ac_compile)
	50	AC_MSG_ERROR(Can't run the compiler - sorry))
	51
	52	AC_TRY_RUN([
	53	main()
	54	{
	55	int __something_strange_();
	56	__something_strange_(0);
	57	}
	58	],AC_MSG_ERROR(Your compiler does not set the exit status - sorry))
	59
	60	AC_PROG_AWK
	61
	62	if test -f etc/toolcheck; then
	63	AC_CHECKING(for buggy tools)
	64	sh etc/toolcheck 1>&AC_FD_MSG
	65	fi
	66
	67	dnl
	68	dnl ** special unix variants **
	69	dnl
	70
	71	AC_CHECKING(for System V)
	72	AC_TRY_COMPILE(
	73	[#include <sys/types.h>
	74	#include <signal.h>
	75	#include <fcntl.h>], [int x = SIGCHLD \| FNDELAY;], , AC_DEFINE(SYSV))
	76
	77	AC_CHECKING(for Solaris 2.x)
78	AC_EGREP_CPP(yes,
79	[#if defined(SVR4) && defined(sun)
80	yes
81	#endif
82	], LIBS="$LIBS -lsocket -lnsl -lkstat")
83
84	dnl
85	dnl ** select() **
86	dnl
87
88	AC_CHECKING(select)
89	AC_TRY_LINK(,[select(0, 0, 0, 0, 0);],,
90	LIBS="$LIBS -lnet -lnsl"
91	AC_CHECKING(select with $LIBS)
92	AC_TRY_LINK(,[select(0, 0, 0, 0, 0);],,
93	AC_MSG_ERROR(!!! no select - no screen))
94	)
95	dnl
96	dnl ** check the select implementation **
97	dnl
98
99	AC_CHECKING(select return value)
100	AC_TRY_RUN([
101	#include <sys/types.h>
102	#include <sys/stat.h>
103	#include <fcntl.h>
104
105	char *nam = "/tmp/conftest$$";
106
107	#ifdef NAMEDPIPE
108
109	#ifndef O_NONBLOCK
110	#define O_NONBLOCK O_NDELAY
111	#endif
112	#ifndef S_IFIFO
113	#define S_IFIFO 0010000
114	#endif
115
116
117	main()
118	{
119	#ifdef FD_SET
120	fd_set f;
121	#else
122	int f;
123	#endif
124
125	#ifdef __FreeBSD__
126	/* From Andrew A. Chernov (ache@astral.msk.su):
127	* opening RDWR fifo fails in BSD 4.4, but select return values are
128	* right.
129	*/
130	exit(0);
131	#endif
132	(void)alarm(5);
133	#ifdef POSIX
134	if (mkfifo(nam, 0777))
135	#else
136	if (mknod(nam, S_IFIFO\|0777, 0))
137	#endif
138	exit(1);
139	close(0);
140	if (open(nam, O_RDWR \| O_NONBLOCK))
141	exit(1);
142	if (write(0, "TEST", 4) == -1)
143	exit(1);
144
145	#else
146
147	#include <sys/types.h>
148	#include <sys/socket.h>
149	#include <sys/un.h>
150
151	main()
152	{
153	int s1, s2, l;
154	struct sockaddr_un a;
155	#ifdef FD_SET
156	fd_set f;
157	#else
158	int f;
159	#endif
160
161	(void)alarm(5);
162	if ((s1 = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
163	exit(1);
164	a.sun_family = AF_UNIX;
165	strcpy(a.sun_path, nam);
166	(void) unlink(nam);
167	if (bind(s1, (struct sockaddr *) &a, strlen(nam)+2) == -1)
168	exit(1);
169	if (listen(s1, 2))
170	exit(1);
171	if (fork() == 0)
172	{
173	if ((s2 = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
174	kill(getppid(), 3);
175	(void)connect(s2, (struct sockaddr *)&a, strlen(nam) + 2);
176	if (write(s2, "HELLO", 5) == -1)
177	kill(getppid(), 3);
178	exit(0);
179	}
180	l = sizeof(a);
181	close(0);
182	if (accept(s1, (struct sockaddr *)&a, &l))
183	exit(1);
184	#endif
185
186
187	#ifdef FD_SET
188	FD_SET(0, &f);
189	#else
190	f = 1;
191	#endif
192	if (select(1, &f, 0, 0, 0) == -1)
193	exit(1);
194	if (select(1, &f, &f, 0, 0) != 2)
195	exit(1);
196	exit(0);
197	}
198	],AC_NOTE(- select is ok),
199	AC_NOTE(- select can't count) AC_DEFINE(SELECT_BROKEN))
200
201	dnl
202	dnl ** termcap or terminfo **
203	dnl
204	AC_CHECKING(for tgetent)
205	AC_TRY_LINK(,tgetent((char )0, (char )0);,,
206	olibs="$LIBS"
207	LIBS="-lcurses $olibs"
208	AC_CHECKING(libcurses)
209	AC_TRY_LINK(,[
210	#ifdef __hpux
211	__sorry_hpux_libcurses_is_totally_broken_in_10_10();
212	#else
213	tgetent((char )0, (char )0);
214	#endif
215	],,
216	LIBS="-ltermcap $olibs"
217	AC_CHECKING(libtermcap)
218	AC_TRY_LINK(,tgetent((char )0, (char )0);,,
219	LIBS="-ltermlib $olibs"
220	AC_CHECKING(libtermlib)
221	AC_TRY_LINK(,tgetent((char )0, (char )0);,,
222	LIBS="-lncurses $olibs"
223	AC_CHECKING(libncurses)
224	AC_TRY_LINK(,tgetent((char )0, (char )0);,,
225	AC_MSG_ERROR(!!! no tgetent - no screen))))))
226
227	AC_TRY_RUN([
228	main()
229	{
230	exit(strcmp(tgoto("%p1%d", 0, 1), "1") ? 0 : 1);
231	}], AC_NOTE(- you use the termcap database),
232	AC_NOTE(- you use the terminfo database) AC_DEFINE(TERMINFO))
233	AC_CHECKING(ospeed)
234	AC_TRY_LINK(extern short ospeed;,ospeed=5;,,AC_DEFINE(NEED_OSPEED))
235
236	dnl
237	dnl ** PTY specific things **
238	dnl
239	AC_CHECKING(for /dev/ptc)
240	if test -r /dev/ptc; then
241	AC_DEFINE(HAVE_DEV_PTC)
242	fi
243
244	AC_CHECKING(for SVR4 ptys)
245	sysvr4ptys=
246	if test -c /dev/ptmx ; then
247	AC_TRY_LINK([],[ptsname(0);grantpt(0);unlockpt(0);],[AC_DEFINE(HAVE_SVR4_PTYS)
248	sysvr4ptys=1])
249	fi
250
251	AC_CHECK_FUNCS(getpt)
252
253	dnl check for openpty()
254	if test -z "$sysvr4ptys"; then
255	AC_CHECK_FUNCS(openpty,,
256	[AC_CHECK_LIB(util,openpty, [AC_DEFINE(HAVE_OPENPTY)] [LIBS="$LIBS -lutil"])])
257	fi
258
259	AC_CHECKING(for ptyranges)
260	if test -d /dev/ptym ; then
261	pdir='/dev/ptym'
262	else
263	pdir='/dev'
264	fi
265	dnl SCO uses ptyp%d
266	AC_EGREP_CPP(yes,
267	[#ifdef M_UNIX
268	yes;
269	#endif
270	], ptys=`echo /dev/ptyp??`, ptys=`echo $pdir/pty??`)
271	dnl if test -c /dev/ptyp19; then
272	dnl ptys=`echo /dev/ptyp??`
273	dnl else
274	dnl ptys=`echo $pdir/pty??`
275	dnl fi
276	if test "$ptys" != "$pdir/pty??" ; then
277	p0=`echo $ptys \| tr ' ' '\012' \| sed -e 's/^.*\(.\).$/\1/g' \| sort -u \| tr -d '\012'`
278	p1=`echo $ptys \| tr ' ' '\012' \| sed -e 's/^.*\(.\)$/\1/g' \| sort -u \| tr -d '\012'`
279	AC_DEFINE_UNQUOTED(PTYRANGE0,"$p0")
280	AC_DEFINE_UNQUOTED(PTYRANGE1,"$p1")
281	fi
282
283	dnl ** pty mode/group handling **
284	dnl
285	dnl support provided by Luke Mewburn <lm@rmit.edu.au>, 931222
286	AC_ARG_WITH(pty-mode, [ --with-pty-mode=mode default mode for ptys], [ ptymode="${withval}" ])
287	AC_ARG_WITH(pty-group, [ --with-pty-group=group default group for ptys], [ ptygrp="${withval}" ])
288	test -n "$ptymode" \|\| ptymode=0620
289	if test -n "$ptygrp" ; then
290	AC_DEFINE_UNQUOTED(PTYMODE, $ptymode)
291	AC_DEFINE_UNQUOTED(PTYGROUP,$ptygrp)
292	else
293
294	AC_CHECKING(default tty permissions/group)
295	rm -f conftest_grp
296	AC_TRY_RUN([
297	#include <sys/types.h>
298	#include <sys/stat.h>
299	#include <stdio.h>
300	main()
301	{
302	struct stat sb;
303	char x,ttyname();
304	int om, m;
305	FILE *fp;
306
307	if (!(x = ttyname(0))) exit(1);
308	if (stat(x, &sb)) exit(1);
309	om = sb.st_mode;
310	if (om & 002) exit(0);
311	m = system("mesg y");
312	if (m == -1 \|\| m == 127) exit(1);
313	if (stat(x, &sb)) exit(1);
314	m = sb.st_mode;
315	if (chmod(x, om)) exit(1);
316	if (m & 002) exit(0);
317	if (sb.st_gid == getgid()) exit(1);
318	if (!(fp=fopen("conftest_grp", "w")))
319	exit(1);
320	fprintf(fp, "%d\n", sb.st_gid);
321	fclose(fp);
322	exit(0);
323	}
324	],[
325	if test -f conftest_grp; then
326	ptygrp=`cat conftest_grp`
327	AC_NOTE([- pty mode: $ptymode, group: $ptygrp])
328	AC_DEFINE_UNQUOTED(PTYMODE, $ptymode)
329	AC_DEFINE_UNQUOTED(PTYGROUP,$ptygrp)
330	else
331	AC_NOTE(- ptys are world accessable)
332	fi
333	],[
334	WRITEPATH=''
335	XTERMPATH=''
336	AC_PATH_PROG(WRITEPATH, write)
337	AC_PATH_PROG(XTERMPATH, xterm)
338	found=
339	if test -n "$WRITEPATH$XTERMPATH"; then
340	findfollow=
341	lsfollow=
342	found=`find $WRITEPATH $XTERMPATH -follow -print 2>/dev/null`
343	if test -n "$found"; then
344	findfollow=-follow
345	lsfollow=L
346	fi
347	if test -n "$XTERMPATH"; then
348	ptygrpn=`ls -l$lsfollow $XTERMPATH \| sed -n -e 1p \| $AWK '{print $4}'`
349	if test tty != "$ptygrpn"; then
350	XTERMPATH=
351	fi
352	fi
353	fi
354	if test -n "$WRITEPATH$XTERMPATH"; then
355	found=`find $WRITEPATH $XTERMPATH $findfollow -perm -2000 -print`
356	if test -n "$found"; then
357	ptygrp=`ls -ln$lsfollow $found \| sed -n -e 1p \| $AWK '{print $4}'`
358	AC_NOTE([- pty mode: $ptymode, group: $ptygrp])
359	AC_DEFINE_UNQUOTED(PTYMODE, $ptymode)
360	AC_DEFINE_UNQUOTED(PTYGROUP,$ptygrp)
361	else
362	AC_NOTE(- ptys are world accessable)
363	fi
364	else
365	AC_NOTE(- can't determine - assume ptys are world accessable)
366	fi
367	]
368	)
369	rm -f conftest_grp
370	fi
371
372	dnl
373	dnl ** signal handling **
374	dnl
375	if test -n "$posix" ; then
376
377	dnl POSIX has reliable signals with void return type.
378	AC_NOTE(assuming posix signal definition)
379	AC_DEFINE(SIGVOID)
380
381	else
382
383	AC_CHECKING(return type of signal handlers)
384	AC_TRY_COMPILE(
385	[#include <sys/types.h>
386	#include <signal.h>
387	#ifdef signal
388	#undef signal
389	#endif
390	extern void (*signal ()) ();], [int i;], AC_DEFINE(SIGVOID))
391	AC_CHECKING(sigset)
392	AC_TRY_LINK([
393	#include <sys/types.h>
394	#include <signal.h>
395	],[
396	#ifdef SIGVOID
397	sigset(0, (void (*)())0);
398	#else
399	sigset(0, (int (*)())0);
400	#endif
401	], AC_DEFINE(USESIGSET))
402	AC_CHECKING(signal implementation)
403	AC_TRY_RUN([
404	#include <sys/types.h>
405	#include <signal.h>
406
407	#ifndef SIGCLD
408	#define SIGCLD SIGCHLD
409	#endif
410	#ifdef USESIGSET
411	#define signal sigset
412	#endif
413
414	int got;
415
416	#ifdef SIGVOID
417	void
418	#endif
419	hand()
420	{
421	got++;
422	}
423
424	main()
425	{
426	/* on hpux we use sigvec to get bsd signals */
427	#ifdef __hpux
428	(void)signal(SIGCLD, hand);
429	kill(getpid(), SIGCLD);
430	kill(getpid(), SIGCLD);
431	if (got < 2)
432	exit(1);
433	#endif
434	exit(0);
435	}
436	],,AC_DEFINE(SYSVSIGS))
437
438	fi
439
cc88a640 JK	440	AC_CHECK_HEADERS(sys/stropts.h sys/wait.h)
cc88a640 JK	441
b585a9fa	442	AC_OUTPUT(Makefile)