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