1 #!/bin/sh
2 #
3 # Copyright (c) 2021, 2022 Omar Polo <op@omarpolo.com>
4 # Copyright (c) 2011, 2013-2022 Ingo Schwarze <schwarze@openbsd.org>
5 # Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
6 #
7 # Permission to use, copy, modify, and distribute this software for any
8 # purpose with or without fee is hereby granted, provided that the above
9 # copyright notice and this permission notice appear in all copies.
10 #
11 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 
19 set -e
20 
21 [ -w config.log ] && mv config.log config.log.old
22 [ -w config.h   ] && mv config.h   config.h.old
23 
24 # Output file descriptor usage:
25 # 1 (stdout): config.h, Makefile.local
26 # 2 (stderr): original stderr, usually to the console
27 # 3: config.log
28 
29 exec 3> config.log
30 echo "file config.log: writing..."
31 
32 # --------
33 # default settings: initialize all vars here such that nothing is
34 # leaked from the environment except for CC, CFLAGS and LDFLAGS
35 
36 VERSION=2.0-unstable
37 
38 CC=`printf "all:\\n\\t@echo \\\$(CC)\\n" | make ${MAKE_FLAGS} -sf -`
39 
40 if [ -z "${CFLAGS}" ]; then
41 	CFLAGS=`printf "all:\\n\\t@echo \\\$(CFLAGS)\\n" | make ${MAKE_FLAGS} -sf -`
42 fi
43 
44 CFLAGS="${CFLAGS} -W -Wall -Wextra -Wmissing-prototypes -Wstrict-prototypes"
45 CFLAGS="${CFLAGS} -Wwrite-strings -Wno-unused-parameter"
46 
47 if [ -z "${LDFLAGS}" ]; then
48 	LDFLAGS=`printf "all:\\n\\t@echo \\\$(LDFLAGS)\\n" | make ${MAKE_FLAGS} -sf -`
49 	LDFLAGS="-ltls -levent -lcrypto"
50 fi
51 
52 LD_IMSG=
53 STATIC=
54 YACC=yacc
55 
56 COBJS=
57 
58 DISABLE_SANDBOX=0
59 
60 NEED_GNU_SOURCE=0
61 NEED_OPENBSD_SOURCE=0
62 
63 PREFIX="/usr/local"
64 BINDIR=
65 
66 INSTALL="install"
67 
68 add_library() {
69 	if pkg-config "$1"; then
70 		CFLAGS="${CFLAGS} $(pkg-config --cflags "$1")"
71 		LDFLAGS="${LDFLAGS} $(pkg-config --libs "$1")"
72 	fi
73 }
74 
75 # try to auto detect CFLAGS and LDFLAGS
76 if command -v pkg-config >/dev/null; then
77 	add_library "libtls"
78 	add_library "openssl"
79 
80 	case "$(uname)" in
81 		OpenBSD)
82 			# use libevent and imsg in base
83 			;;
84 		*)
85 			add_library "libevent"
86 			add_library "libimsg"
87 			;;
88 	esac
89 
90 	case "$(uname)" in
91 		*BSD|DragonFly|Darwin)
92 			;;
93 		*)
94 			add_library "libbsd-ctor libbsd-overlay"
95 			;;
96 	esac
97 fi
98 
99 # auto detect yacc/bison
100 command -v ${YACC} >/dev/null || {
101 	echo "${YACC} not found: trying bison" 1>&2
102 	echo "${YACC} not found: trying bison" 1>&3
103 	YACC=bison
104 	command -v ${YACC} >/dev/null || {
105 		echo "${YACC} not found: giving up" 1>&2
106 		echo "${YACC} not found: giving up" 1>&3
107 	}
108 }
109 
110 # --------
111 # allow certain variables to be overridden on the command line
112 
113 for keyvals in "$@"; do
114 	if [ "$keyvals" = "--disable-sandbox" ]; then
115 		DISABLE_SANDBOX=1
116 		continue
117 	fi
118 
119 	if [ "$keyvals" = "--enable-sandbox" ]; then
120 		DISABLE_SANDBOX=0
121 		continue
122 	fi
123 
124 	key=`echo $keyvals | cut -s -d '=' -f1`
125 	if [ -z "$key" ]; then
126 		echo "$0: invalid key-value: $keyvals" 1>&2
127 		exit 1
128 	fi
129 	val=`echo $keyvals | cut -d '=' -f 2-`
130 	case "$key" in
131 		BINDIR)   BINDIR="$val" ;;
132 		CC)       CC="$val" ;;
133 		CFLAGS)   CFLAGS="$val" ;;
134 		DESTDIR)  DESTDIR="$val" ;;
135 		LDFLAGS)  LDFLAGS="$val" ;;
136 		MANDIR)   MANDIR="$val" ;;
137 		PREFIX)   PREFIX="$val" ;;
138 		YACC)     YACC="$val" ;;
139 		--prefix) PREFIX="$val" ;;
140 		*)
141 			echo "$0: invalid key: $key" 1>&2
142 			exit 1
143 	esac
144 done
145 
146 # --------
147 # Allow configure.local to override all variables, default settings,
148 # command-line arguments, and tested features, above.
149 
150 if [ -r ./configure.local ]; then
151 	echo "configure.local: reading..." 1>&2
152 	echo "configure.local: reading..." 1>&3
153 	cat ./configure.local 1>&3
154 	. ./configure.local
155 else
156 	echo "configure.local: no (fully automatic configuration)" 1>&2
157 	echo "configure.local: no (fully automatic configuration)" 1>&3
158 fi
159 
160 # --------
161 # tests functions
162 
163 # Check whether this HAVE_ setting is manually overridden.
164 # If yes, use the override, if no, do not decide anything yet.
165 # Arguments: test file name, test var name, manual value
166 ismanual() {
167 	[ -z "${3}" ] && return 1
168 	echo "tested ${1}: HAVE_${2}=${3} (manual)" 1>&2
169 	echo "tested ${1}: HAVE_${2}=${3} (manual)" 1>&3
170 	echo 1>&3
171 	return 0
172 }
173 
174 # Run a single autoconfiguration test.
175 # In case of success, enable the feature.
176 # In case of failure, do not decide anything yet.
177 # Arguments: test file name, test var name, additional CFLAGS
178 singletest() {
179 	n=${1}${3}
180 	cat 1>&3 << __HEREDOC__
181 testing ${n} ...
182 ${COMP} -o have/${1} have/${1}.c ${3} ${LDFLAGS}
183 __HEREDOC__
184 
185 	if ${COMP} -o "have/${1}" "have/${1}.c" ${3} ${LDFLAGS} 1>&3 2>&3
186 	then
187 		echo "tested ${n}: yes" 1>&2
188 		echo "tested ${n}: yes" 1>&3
189 		echo 1>&3
190 		eval HAVE_${2}=1
191 		[ "${3}" = "-D_GNU_SOURCE" ] && NEED_GNU_SOURCE=1
192 		[ "${3}" = "-D_OPENBSD_SOURCE" ] && NEED_OPENBSD_SOURCE=1
193 		[ "${3}" = "-lutil" ] && LD_IMSG="-lutil"
194 		rm "have/${1}"
195 		return 0
196 	else
197 		echo "tested ${n}: no (compilation failed)" 1>&2
198 		echo "result of ${n}: ${CC} failed with exit status $?" 1>&3
199 		echo "result of compiling ${n}: no" 1>&3
200 		echo 1>&3
201 		return 1
202 	fi
203 }
204 
205 # Run a complete autoconfiguration test, including the check for
206 # a manual override and disabling the feature on failure.
207 # Arguments: test file name, test var name, additional CFLAGS
208 # The final argument can optionally be repeated a second time.
209 runtest() {
210 	eval _manual=\${HAVE_${2}}
211 	ismanual "${1}" "${2}" "${_manual}" && return 0
212 	singletest "${1}" "${2}" "${3}" && return 0
213 	[ -n "${4}" ] && singletest "${1}" "${2}" "${4}" && return 0
214 	eval HAVE_${2}=0
215 	return 1
216 }
217 
218 # --------
219 # compiler options
220 
221 COMP="${CC} ${CFLAGS} -Wno-unused -Werror"
222 
223 echo "selected CFLAGS=\"${CFLAGS}\"" 1>&2
224 echo "selected CFLAGS=\"${CFLAGS}\"" 1>&3
225 echo 1>&3
226 
227 if [ -n "${STATIC}" ]; then
228 	echo "selected STATIC=\"${STATIC}\" (manual)" 1>&2
229 	echo "selected STATIC=\"${STATIC}\" (manual)" 1>&3
230 	echo 1>&3
231 else
232 	runtest noop STATIC -static || true
233 	[ ${HAVE_STATIC} -eq 0 ] || STATIC="-static"
234 	echo "selected STATIC=\"${STATIC}\"" 1>&2
235 	echo "selected STATIC=\"${STATIC}\"" 1>&3
236 	echo 1>&3
237 fi
238 
239 # --------
240 # tests for config.h
241 
242 runtest err		ERR		|| true
243 runtest explicit_bzero	EXPLICIT_BZERO	|| true
244 runtest freezero	FREEZERO	|| true
245 runtest getdtablecount	GETDTABLECOUNT	|| true
246 runtest getdtablesize	GETDTABLESIZE	|| true
247 runtest getprogname	GETPROGNAME	|| true
248 runtest imsg		IMSG		-lutil || true
249 runtest landlock	LANDLOCK	|| true
250 runtest libevent	LIBEVENT	|| true
251 runtest libevent2	LIBEVENT2	|| true
252 runtest libtls		LIBTLS		|| true
253 runtest memmem		MEMMEM		"" -D_GNU_SOURCE || true
254 runtest openssl		OPENSSL		|| true
255 runtest pr_set_name	PR_SET_NAME	|| true
256 runtest program_invocation_short_name PROGRAM_INVOCATION_SHORT_NAME "" -D_GNU_SOURCE || true
257 runtest queue_h		QUEUE_H		|| true
258 runtest reallocarray	REALLOCARRAY	|| true
259 runtest recallocarray	RECALLOCARRAY	|| true
260 runtest setproctitle	SETPROCTITLE	|| true
261 runtest setresgid	SETRESGID	"" -D_GNU_SOURCE || true
262 runtest setresuid	SETRESUID	"" -D_GNU_SOURCE || true
263 runtest strlcat		STRLCAT		|| true
264 runtest strlcpy		STRLCPY		|| true
265 runtest strtonum	STRTONUM	|| true
266 runtest tree_h		TREE_H		|| true
267 runtest vasprintf	VASPRINTF	"" -D_GNU_SOURCE || true
268 
269 if [ ${HAVE_LIBTLS} -eq 0 ]; then
270 	echo "FATAL: libtls not found" 1>&2
271 	echo "FATAL: libtls not found" 1>&3
272 	exit 1
273 fi
274 
275 if [ ${HAVE_OPENSSL} -eq 0 ]; then
276 	echo "FATAL: openssl not found" 1>&2
277 	echo "FATAL: openssl not found" 1>&3
278 	exit 1
279 fi
280 
281 if [ ${HAVE_LIBEVENT} -eq 0 ]; then
282 	echo "FATAL: libevent not found" 1>&2
283 	echo "FATAL: libevent not found" 1>&3
284 	exit 1
285 fi
286 
287 if [ ${HAVE_QUEUE_H} -eq 0 -o ${HAVE_IMSG} -eq 0 -o ${HAVE_TREE_H} -eq 0 ]; then
288 	CFLAGS="${CFLAGS} -I ${PWD}/compat"
289 fi
290 
291 # --------
292 # write config.h
293 
294 exec > config.h
295 
296 cat <<__HEREDOC__
297 #ifdef __cplusplus
298 #error "Do not use C++."
299 #endif
300 __HEREDOC__
301 
302 [ ${NEED_GNU_SOURCE} -eq 0 ] || echo "#define _GNU_SOURCE"
303 [ ${NEED_OPENBSD_SOURCE} -eq 0 ] || echo "#define _OPENBSD_SOURCE"
304 
305 [ ${HAVE_STRLCAT} -eq 0 -o ${HAVE_STRLCPY} -eq 0 -o ${HAVE_IMSG} -eq 0 ] \
306 	&& echo "#include <sys/types.h>"
307 [ ${HAVE_VASPRINTF} -eq 0 ] && echo "#include <stdarg.h>"
308 
309 if [ ${HAVE_QUEUE_H} -eq 1 ]; then
310 	echo "#include <sys/queue.h>"
311 else
312 	echo "#include <queue.h>"
313 fi
314 
315 if [ ${HAVE_TREE_H} -eq 1 ]; then
316 	echo "#include <sys/tree.h>"
317 else
318 	echo "#include <tree.h>"
319 fi
320 
321 echo "#include <sys/types.h>"
322 echo "#include <sys/uio.h>"
323 echo "#include <stdint.h>"
324 echo "#include <imsg.h>"
325 echo "#include <limits.h>"
326 
327 cat <<__HEREDOC__
328 
329 #define VERSION			"${VERSION}"
330 #define DISABLE_SANDBOX		${DISABLE_SANDBOX}
331 
332 #define HAVE_ERR		${HAVE_ERR}
333 #define HAVE_EXPLICIT_BZERO	${HAVE_EXPLICIT_BZERO}
334 #define HAVE_FREEZERO		${HAVE_FREEZERO}
335 #define HAVE_GETDTABLECOUNT	${HAVE_GETDTABLECOUNT}
336 #define HAVE_GETDTABLESIZE	${HAVE_GETDTABLESIZE}
337 #define HAVE_GETPROGNAME	${HAVE_GETPROGNAME}
338 #define HAVE_IMSG		${HAVE_IMSG}
339 #define HAVE_LANDLOCK		${HAVE_LANDLOCK}
340 #define HAVE_LIBEVENT		${HAVE_LIBEVENT}
341 #define HAVE_LIBEVENT2		${HAVE_LIBEVENT2}
342 #define HAVE_PROGRAM_INVOCATION_SHORT_NAME ${HAVE_PROGRAM_INVOCATION_SHORT_NAME}
343 #define HAVE_PR_SET_NAME	${HAVE_PR_SET_NAME}
344 #define HAVE_QUEUE_H		${HAVE_QUEUE_H}
345 #define HAVE_REALLOCARRAY	${HAVE_REALLOCARRAY}
346 #define HAVE_RECALLOCARRAY	${HAVE_RECALLOCARRAY}
347 #define HAVE_SETPROCTITLE	${HAVE_SETPROCTITLE}
348 #define HAVE_SETRESGID		${HAVE_SETRESGID}
349 #define HAVE_SETRESUID		${HAVE_SETRESUID}
350 #define HAVE_STRLCAT		${HAVE_STRLCAT}
351 #define HAVE_STRLCPY		${HAVE_STRLCPY}
352 #define HAVE_STRTONUM		${HAVE_STRTONUM}
353 #define HAVE_TREE_H		${HAVE_TREE_H}
354 #define HAVE_VASPRINTF		${HAVE_VASPRINTF}
355 
356 __HEREDOC__
357 
358 [ ${HAVE_EXPLICIT_BZERO} -eq 0 -o \
359   ${HAVE_FREEZERO} -eq 0 -o \
360   ${HAVE_REALLOCARRAY} -eq 0 -o \
361   ${HAVE_RECALLOCARRAY} -eq 0 -o \
362   ${HAVE_STRLCAT} -eq 0 -o \
363   ${HAVE_STRLCPY} -eq 0 -o \
364   ${HAVE_STRTONUM} -eq 0 ] && echo "#include <stddef.h>"
365 
366 [ ${HAVE_SETRESGID} -eq 0 -o \
367   ${HAVE_SETRESUID} -eq 0 ] && echo "#include <unistd.h>"
368 
369 if [ ${HAVE_ERR} -eq 0 ]; then
370 	echo "extern	void	 err(int, const char*, ...);"
371 	echo "extern	void	 errx(int, const char*, ...);"
372 	echo "extern	void	 warn(const char*, ...);"
373 	echo "extern	void	 warnx(const char*, ...);"
374 	COBJS="${COBJS} compat/err.o"
375 else
376 	echo "#include <err.h>"
377 fi
378 if [ ${HAVE_EXPLICIT_BZERO} -eq 0 ]; then
379 	echo "extern	void	 explicit_bzero(void*, size_t);"
380 	COBJS="${COBJS} compat/explicit_bzero.o"
381 fi
382 if [ ${HAVE_FREEZERO} -eq 0 ]; then
383 	echo "extern	void	 freezero(void*, size_t);"
384 	COBJS="${COBJS} compat/freezero.o"
385 fi
386 if [ ${HAVE_GETDTABLECOUNT} -eq 0 ]; then
387 	echo "extern	int	 getdtablecount(void);"
388 	COBJS="${COBJS} compat/getdtablecount.o"
389 fi
390 if [ ${HAVE_GETDTABLESIZE} -eq 0 ]; then
391 	echo "extern	int	 getdtablesize(void);"
392 	COBJS="${COBJS} compat/getdtablesize.o"
393 fi
394 if [ ${HAVE_GETPROGNAME} -eq 0 ]; then
395 	echo "extern	const char *getprogname(void);"
396 	COBJS="${COBJS} compat/getprogname.o"
397 fi
398 if [ ${HAVE_IMSG} -eq 0 ]; then
399 	COBJS="${COBJS} compat/imsg.o compat/imsg-buffer.o"
400 fi
401 if [ ${HAVE_MEMMEM} -eq 0 ]; then
402 	echo "extern void *memmem(const void *, size_t, const void *, size_t);"
403 	COBJS="${COBJS} compat/memmem.o"
404 fi
405 if [ ${HAVE_REALLOCARRAY} -eq 0 ]; then
406 	echo "extern	void	*reallocarray(void*, size_t, size_t);"
407 	COBJS="${COBJS} compat/reallocarray.o"
408 fi
409 if [ ${HAVE_RECALLOCARRAY} -eq 0 ]; then
410 	echo "extern	void	*recallocarray(void*, size_t, size_t, size_t);"
411 	COBJS="${COBJS} compat/recallocarray.o"
412 fi
413 if [ ${HAVE_SETPROCTITLE} -eq 0 ]; then
414 	echo "extern	void	 setproctitle(const char *fmt, ...);"
415 	COBJS="${COBJS} compat/setproctitle.o"
416 fi
417 if [ ${HAVE_SETRESGID} -eq 0 ]; then
418 	echo "extern	int	 setresgid(gid_t, gid_t, gid_t);"
419 	COBJS="${COBJS} compat/setresgid.o"
420 fi
421 if [ ${HAVE_SETRESUID} -eq 0 ]; then
422 	echo "extern	int	 setresuid(uid_t, uid_t, uid_t);"
423 	COBJS="${COBJS} compat/setresuid.o"
424 fi
425 if [ ${HAVE_STRLCAT} -eq 0 ]; then
426 	echo "extern	size_t	 strlcat(char*, const char*, size_t);"
427 	COBJS="${COBJS} compat/strlcat.o"
428 fi
429 if [ ${HAVE_STRLCPY} -eq 0 ]; then
430 	echo "extern	size_t	 strlcpy(char*, const char*, size_t);"
431 	COBJS="${COBJS} compat/strlcpy.o"
432 fi
433 if [ ${HAVE_STRTONUM} -eq 0 ]; then
434 	echo "extern	long long strtonum(const char*, long long, long long, const char**);"
435 	COBJS="${COBJS} compat/strtonum.o"
436 fi
437 if [ ${HAVE_VASPRINTF} -eq 0 ]; then
438 	echo "extern	int	 vasprintf(char**, const char*, va_list);"
439 	COBJS="${COBJS} compat/vasprintf.o"
440 fi
441 
442 cat <<__HEREDOC__
443 
444 #ifndef __dead
445 #define __dead __attribute__((noreturn))
446 #endif
447 
448 /* Linux and OpenBSD have LOGIN_NAME_MAX, FreeBSD MAXLOGNAME. */
449 #ifndef LOGIN_NAME_MAX
450 # if defined(MAXLOGNAME)
451 #  define LOGIN_NAME_MAX MAXLOGNAME
452 # elif defined(_POSIX_LOGIN_NAME_MAX)
453 #  define LOGIN_NAME_MAX _POSIX_LOGIN_NAME_MAX
454 # else
455 #  define LOGIN_NAME_MAX 32
456 # endif
457 #endif
458 
459 #ifndef HOST_NAME_MAX
460 # if defined(_POSIX_HOST_NAME_MAX)
461 #  define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
462 # else
463 #  define HOST_NAME_MAX 255
464 # endif
465 #endif
466 __HEREDOC__
467 
468 echo "file config.h: written" 1>&2
469 echo "file config.h: written" 1>&3
470 
471 # --------
472 # tests for Makefile.local
473 
474 exec > Makefile.local
475 
476 [ -z "${BINDIR}"          ] && BINDIR="${PREFIX}/bin"
477 [ -z "${MANDIR}"          ] && MANDIR="${PREFIX}/man"
478 
479 [ -z "${INSTALL_PROGRAM}" ] && INSTALL_PROGRAM="${INSTALL} -m 0555"
480 [ -z "${INSTALL_LIB}"     ] && INSTALL_LIB="${INSTALL} -m 0444"
481 [ -z "${INSTALL_MAN}"     ] && INSTALL_MAN="${INSTALL} -m 0444"
482 [ -z "${INSTALL_DATA}"    ] && INSTALL_DATA="${INSTALL} -m 0444"
483 
484 cat << __HEREDOC__
485 CC		= ${CC}
486 CFLAGS		= ${CFLAGS}
487 LDFLAGS		= ${LDFLAGS} ${LD_IMSG}
488 YACC		= ${YACC}
489 STATIC		= ${STATIC}
490 PREFIX		= ${PREFIX}
491 BINDIR		= ${BINDIR}
492 MANDIR		= ${MANDIR}
493 INCLUDEDIR	= ${INCLUDEDIR}
494 INSTALL		= ${INSTALL}
495 INSTALL_PROGRAM	= ${INSTALL_PROGRAM}
496 INSTALL_LIB	= ${INSTALL_LIB}
497 INSTALL_MAN	= ${INSTALL_MAN}
498 INSTALL_DATA	= ${INSTALL_DATA}
499 
500 COBJS		= ${COBJS}
501 
502 VERSION		= ${VERSION}
503 
504 __HEREDOC__
505 
506 echo "file Makefile.local: written" 1>&2
507 echo "file Makefile.local: written" 1>&3
508 
509 exit 0