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="${CFLAGS} -Wwrite-strings -Wno-unused-parameter"
46 CFLAGS="${CFLAGS} -Wno-missing-field-initializers"
47 
48 if [ -z "${LDFLAGS}" ]; then
49 	LDFLAGS=`printf "all:\\n\\t@echo \\\$(LDFLAGS)\\n" | make ${MAKE_FLAGS} -sf -`
50 	LDFLAGS="-ltls -levent -lcrypto"
51 fi
52 
53 LD_IMSG=
54 STATIC=
55 YACC=yacc
56 
57 COBJS=
58 
59 DISABLE_SANDBOX=0
60 
61 NEED_GNU_SOURCE=0
62 NEED_OPENBSD_SOURCE=0
63 
64 PREFIX="/usr/local"
65 BINDIR=
66 
67 INSTALL="install"
68 
69 add_library() {
70 	if pkg-config "$1"; then
71 		CFLAGS="${CFLAGS} $(pkg-config --cflags "$1")"
72 		LDFLAGS="${LDFLAGS} $(pkg-config --libs "$1")"
73 	fi
74 }
75 
76 # try to auto detect CFLAGS and LDFLAGS
77 if command -v pkg-config >/dev/null; then
78 	add_library "libtls"
79 	add_library "openssl"
80 
81 	case "$(uname)" in
82 		OpenBSD)
83 			# use libevent and imsg in base
84 			;;
85 		*)
86 			add_library "libevent"
87 			add_library "libimsg"
88 			;;
89 	esac
90 
91 	case "$(uname)" in
92 		*BSD|DragonFly|Darwin)
93 			;;
94 		*)
95 			add_library "libbsd-ctor libbsd-overlay"
96 			;;
97 	esac
98 fi
99 
100 # auto detect yacc/bison
101 command -v ${YACC} >/dev/null || {
102 	echo "${YACC} not found: trying bison" 1>&2
103 	echo "${YACC} not found: trying bison" 1>&3
104 	YACC=bison
105 	command -v ${YACC} >/dev/null || {
106 		echo "${YACC} not found: giving up" 1>&2
107 		echo "${YACC} not found: giving up" 1>&3
108 	}
109 }
110 
111 # --------
112 # allow certain variables to be overridden on the command line
113 
114 for keyvals in "$@"; do
115 	if [ "$keyvals" = "--disable-sandbox" ]; then
116 		DISABLE_SANDBOX=1
117 		continue
118 	fi
119 
120 	if [ "$keyvals" = "--enable-sandbox" ]; then
121 		DISABLE_SANDBOX=0
122 		continue
123 	fi
124 
125 	key=`echo $keyvals | cut -s -d '=' -f1`
126 	if [ -z "$key" ]; then
127 		echo "$0: invalid key-value: $keyvals" 1>&2
128 		exit 1
129 	fi
130 	val=`echo $keyvals | cut -d '=' -f 2-`
131 	case "$key" in
132 		BINDIR)   BINDIR="$val" ;;
133 		CC)       CC="$val" ;;
134 		CFLAGS)   CFLAGS="$val" ;;
135 		DESTDIR)  DESTDIR="$val" ;;
136 		LDFLAGS)  LDFLAGS="$val" ;;
137 		MANDIR)   MANDIR="$val" ;;
138 		PREFIX)   PREFIX="$val" ;;
139 		YACC)     YACC="$val" ;;
140 		--prefix) PREFIX="$val" ;;
141 		*)
142 			echo "$0: invalid key: $key" 1>&2
143 			exit 1
144 	esac
145 done
146 
147 # --------
148 # Allow configure.local to override all variables, default settings,
149 # command-line arguments, and tested features, above.
150 
151 if [ -r ./configure.local ]; then
152 	echo "configure.local: reading..." 1>&2
153 	echo "configure.local: reading..." 1>&3
154 	cat ./configure.local 1>&3
155 	. ./configure.local
156 else
157 	echo "configure.local: no (fully automatic configuration)" 1>&2
158 	echo "configure.local: no (fully automatic configuration)" 1>&3
159 fi
160 
161 # --------
162 # tests functions
163 
164 # Check whether this HAVE_ setting is manually overridden.
165 # If yes, use the override, if no, do not decide anything yet.
166 # Arguments: test file name, test var name, manual value
167 ismanual() {
168 	[ -z "${3}" ] && return 1
169 	echo "tested ${1}: HAVE_${2}=${3} (manual)" 1>&2
170 	echo "tested ${1}: HAVE_${2}=${3} (manual)" 1>&3
171 	echo 1>&3
172 	return 0
173 }
174 
175 # Run a single autoconfiguration test.
176 # In case of success, enable the feature.
177 # In case of failure, do not decide anything yet.
178 # Arguments: test file name, test var name, additional CFLAGS
179 singletest() {
180 	n=${1}${3}
181 	cat 1>&3 << __HEREDOC__
182 testing ${n} ...
183 ${COMP} -o have/${1} have/${1}.c ${3} ${LDFLAGS}
184 __HEREDOC__
185 
186 	if ${COMP} -o "have/${1}" "have/${1}.c" ${3} ${LDFLAGS} 1>&3 2>&3
187 	then
188 		echo "tested ${n}: yes" 1>&2
189 		echo "tested ${n}: yes" 1>&3
190 		echo 1>&3
191 		eval HAVE_${2}=1
192 		[ "${3}" = "-D_GNU_SOURCE" ] && NEED_GNU_SOURCE=1
193 		[ "${3}" = "-D_OPENBSD_SOURCE" ] && NEED_OPENBSD_SOURCE=1
194 		[ "${3}" = "-lutil" ] && LD_IMSG="-lutil"
195 		rm "have/${1}"
196 		return 0
197 	else
198 		echo "tested ${n}: no (compilation failed)" 1>&2
199 		echo "result of ${n}: ${CC} failed with exit status $?" 1>&3
200 		echo "result of compiling ${n}: no" 1>&3
201 		echo 1>&3
202 		return 1
203 	fi
204 }
205 
206 # Run a complete autoconfiguration test, including the check for
207 # a manual override and disabling the feature on failure.
208 # Arguments: test file name, test var name, additional CFLAGS
209 # The final argument can optionally be repeated a second time.
210 runtest() {
211 	eval _manual=\${HAVE_${2}}
212 	ismanual "${1}" "${2}" "${_manual}" && return 0
213 	singletest "${1}" "${2}" "${3}" && return 0
214 	[ -n "${4}" ] && singletest "${1}" "${2}" "${4}" && return 0
215 	eval HAVE_${2}=0
216 	return 1
217 }
218 
219 # --------
220 # compiler options
221 
222 COMP="${CC} ${CFLAGS} -Wno-unused -Werror"
223 
224 echo "selected CFLAGS=\"${CFLAGS}\"" 1>&2
225 echo "selected CFLAGS=\"${CFLAGS}\"" 1>&3
226 echo 1>&3
227 
228 if [ -n "${STATIC}" ]; then
229 	echo "selected STATIC=\"${STATIC}\" (manual)" 1>&2
230 	echo "selected STATIC=\"${STATIC}\" (manual)" 1>&3
231 	echo 1>&3
232 else
233 	runtest noop STATIC -static || true
234 	[ ${HAVE_STATIC} -eq 0 ] || STATIC="-static"
235 	echo "selected STATIC=\"${STATIC}\"" 1>&2
236 	echo "selected STATIC=\"${STATIC}\"" 1>&3
237 	echo 1>&3
238 fi
239 
240 # --------
241 # tests for config.h
242 
243 if runtest noop MMD -MMD; then
244 	CFLAGS="${CFLAGS} -MMD"
245 fi
246 
247 if ! runtest wait_any WAIT_ANY; then
248 	CFLAGS="${CFLAGS} -DWAIT_ANY=-1"
249 fi
250 
251 runtest err		ERR		|| true
252 runtest explicit_bzero	EXPLICIT_BZERO	|| true
253 runtest freezero	FREEZERO	|| true
254 runtest getdtablecount	GETDTABLECOUNT	|| true
255 runtest getdtablesize	GETDTABLESIZE	|| true
256 runtest getprogname	GETPROGNAME	|| true
257 runtest imsg		IMSG		-lutil || true
258 runtest libevent	LIBEVENT	|| true
259 runtest libevent2	LIBEVENT2	|| true
260 runtest libtls		LIBTLS		|| true
261 runtest memmem		MEMMEM		"" -D_GNU_SOURCE || true
262 runtest openssl		OPENSSL		|| true
263 runtest pr_set_name	PR_SET_NAME	|| true
264 runtest program_invocation_short_name PROGRAM_INVOCATION_SHORT_NAME "" -D_GNU_SOURCE || true
265 runtest queue_h		QUEUE_H		|| true
266 runtest reallocarray	REALLOCARRAY	|| true
267 runtest recallocarray	RECALLOCARRAY	|| true
268 runtest setproctitle	SETPROCTITLE	|| true
269 runtest setresgid	SETRESGID	"" -D_GNU_SOURCE || true
270 runtest setresuid	SETRESUID	"" -D_GNU_SOURCE || true
271 runtest strlcat		STRLCAT		|| true
272 runtest strlcpy		STRLCPY		|| true
273 runtest strtonum	STRTONUM	|| true
274 runtest tree_h		TREE_H		|| true
275 runtest vasprintf	VASPRINTF	"" -D_GNU_SOURCE || true
276 
277 if [ ${HAVE_LIBTLS} -eq 0 ]; then
278 	echo "FATAL: libtls not found" 1>&2
279 	echo "FATAL: libtls not found" 1>&3
280 	exit 1
281 fi
282 
283 if [ ${HAVE_OPENSSL} -eq 0 ]; then
284 	echo "FATAL: openssl not found" 1>&2
285 	echo "FATAL: openssl not found" 1>&3
286 	exit 1
287 fi
288 
289 if [ ${HAVE_LIBEVENT} -eq 0 ]; then
290 	echo "FATAL: libevent not found" 1>&2
291 	echo "FATAL: libevent not found" 1>&3
292 	exit 1
293 fi
294 
295 if [ ${HAVE_QUEUE_H} -eq 0 -o ${HAVE_IMSG} -eq 0 -o ${HAVE_TREE_H} -eq 0 ]; then
296 	CFLAGS="${CFLAGS} -I ${PWD}/compat"
297 fi
298 
299 # --------
300 # write config.h
301 
302 exec > config.h
303 
304 cat <<__HEREDOC__
305 #ifdef __cplusplus
306 #error "Do not use C++."
307 #endif
308 __HEREDOC__
309 
310 [ ${NEED_GNU_SOURCE} -eq 0 ] || echo "#define _GNU_SOURCE"
311 [ ${NEED_OPENBSD_SOURCE} -eq 0 ] || echo "#define _OPENBSD_SOURCE"
312 
313 [ ${HAVE_STRLCAT} -eq 0 -o ${HAVE_STRLCPY} -eq 0 -o ${HAVE_IMSG} -eq 0 ] \
314 	&& echo "#include <sys/types.h>"
315 [ ${HAVE_VASPRINTF} -eq 0 ] && echo "#include <stdarg.h>"
316 
317 if [ ${HAVE_QUEUE_H} -eq 1 ]; then
318 	echo "#include <sys/queue.h>"
319 else
320 	echo "#include <queue.h>"
321 fi
322 
323 if [ ${HAVE_TREE_H} -eq 1 ]; then
324 	echo "#include <sys/tree.h>"
325 else
326 	echo "#include <tree.h>"
327 fi
328 
329 echo "#include <sys/types.h>"
330 echo "#include <sys/uio.h>"
331 echo "#include <stdint.h>"
332 echo "#include <imsg.h>"
333 echo "#include <limits.h>"
334 
335 cat <<__HEREDOC__
336 
337 #define VERSION			"${VERSION}"
338 #define DISABLE_SANDBOX		${DISABLE_SANDBOX}
339 
340 #define HAVE_ERR		${HAVE_ERR}
341 #define HAVE_EXPLICIT_BZERO	${HAVE_EXPLICIT_BZERO}
342 #define HAVE_FREEZERO		${HAVE_FREEZERO}
343 #define HAVE_GETDTABLECOUNT	${HAVE_GETDTABLECOUNT}
344 #define HAVE_GETDTABLESIZE	${HAVE_GETDTABLESIZE}
345 #define HAVE_GETPROGNAME	${HAVE_GETPROGNAME}
346 #define HAVE_IMSG		${HAVE_IMSG}
347 #define HAVE_LIBEVENT		${HAVE_LIBEVENT}
348 #define HAVE_LIBEVENT2		${HAVE_LIBEVENT2}
349 #define HAVE_PROGRAM_INVOCATION_SHORT_NAME ${HAVE_PROGRAM_INVOCATION_SHORT_NAME}
350 #define HAVE_PR_SET_NAME	${HAVE_PR_SET_NAME}
351 #define HAVE_QUEUE_H		${HAVE_QUEUE_H}
352 #define HAVE_REALLOCARRAY	${HAVE_REALLOCARRAY}
353 #define HAVE_RECALLOCARRAY	${HAVE_RECALLOCARRAY}
354 #define HAVE_SETPROCTITLE	${HAVE_SETPROCTITLE}
355 #define HAVE_SETRESGID		${HAVE_SETRESGID}
356 #define HAVE_SETRESUID		${HAVE_SETRESUID}
357 #define HAVE_STRLCAT		${HAVE_STRLCAT}
358 #define HAVE_STRLCPY		${HAVE_STRLCPY}
359 #define HAVE_STRTONUM		${HAVE_STRTONUM}
360 #define HAVE_TREE_H		${HAVE_TREE_H}
361 #define HAVE_VASPRINTF		${HAVE_VASPRINTF}
362 
363 __HEREDOC__
364 
365 [ ${HAVE_EXPLICIT_BZERO} -eq 0 -o \
366   ${HAVE_FREEZERO} -eq 0 -o \
367   ${HAVE_REALLOCARRAY} -eq 0 -o \
368   ${HAVE_RECALLOCARRAY} -eq 0 -o \
369   ${HAVE_STRLCAT} -eq 0 -o \
370   ${HAVE_STRLCPY} -eq 0 -o \
371   ${HAVE_STRTONUM} -eq 0 ] && echo "#include <stddef.h>"
372 
373 [ ${HAVE_SETRESGID} -eq 0 -o \
374   ${HAVE_SETRESUID} -eq 0 ] && echo "#include <unistd.h>"
375 
376 if [ ${HAVE_ERR} -eq 0 ]; then
377 	echo "extern	void	 err(int, const char*, ...);"
378 	echo "extern	void	 errx(int, const char*, ...);"
379 	echo "extern	void	 warn(const char*, ...);"
380 	echo "extern	void	 warnx(const char*, ...);"
381 	COBJS="${COBJS} compat/err.o"
382 else
383 	echo "#include <err.h>"
384 fi
385 if [ ${HAVE_EXPLICIT_BZERO} -eq 0 ]; then
386 	echo "extern	void	 explicit_bzero(void*, size_t);"
387 	COBJS="${COBJS} compat/explicit_bzero.o"
388 fi
389 if [ ${HAVE_FREEZERO} -eq 0 ]; then
390 	echo "extern	void	 freezero(void*, size_t);"
391 	COBJS="${COBJS} compat/freezero.o"
392 fi
393 if [ ${HAVE_GETDTABLECOUNT} -eq 0 ]; then
394 	echo "extern	int	 getdtablecount(void);"
395 	COBJS="${COBJS} compat/getdtablecount.o"
396 fi
397 if [ ${HAVE_GETDTABLESIZE} -eq 0 ]; then
398 	echo "extern	int	 getdtablesize(void);"
399 	COBJS="${COBJS} compat/getdtablesize.o"
400 fi
401 if [ ${HAVE_GETPROGNAME} -eq 0 ]; then
402 	echo "extern	const char *getprogname(void);"
403 	COBJS="${COBJS} compat/getprogname.o"
404 fi
405 if [ ${HAVE_IMSG} -eq 0 ]; then
406 	COBJS="${COBJS} compat/imsg.o compat/imsg-buffer.o"
407 fi
408 if [ ${HAVE_MEMMEM} -eq 0 ]; then
409 	echo "extern void *memmem(const void *, size_t, const void *, size_t);"
410 	COBJS="${COBJS} compat/memmem.o"
411 fi
412 if [ ${HAVE_REALLOCARRAY} -eq 0 ]; then
413 	echo "extern	void	*reallocarray(void*, size_t, size_t);"
414 	COBJS="${COBJS} compat/reallocarray.o"
415 fi
416 if [ ${HAVE_RECALLOCARRAY} -eq 0 ]; then
417 	echo "extern	void	*recallocarray(void*, size_t, size_t, size_t);"
418 	COBJS="${COBJS} compat/recallocarray.o"
419 fi
420 if [ ${HAVE_SETPROCTITLE} -eq 0 ]; then
421 	echo "extern	void	 setproctitle(const char *fmt, ...);"
422 	COBJS="${COBJS} compat/setproctitle.o"
423 fi
424 if [ ${HAVE_SETRESGID} -eq 0 ]; then
425 	echo "extern	int	 setresgid(gid_t, gid_t, gid_t);"
426 	COBJS="${COBJS} compat/setresgid.o"
427 fi
428 if [ ${HAVE_SETRESUID} -eq 0 ]; then
429 	echo "extern	int	 setresuid(uid_t, uid_t, uid_t);"
430 	COBJS="${COBJS} compat/setresuid.o"
431 fi
432 if [ ${HAVE_STRLCAT} -eq 0 ]; then
433 	echo "extern	size_t	 strlcat(char*, const char*, size_t);"
434 	COBJS="${COBJS} compat/strlcat.o"
435 fi
436 if [ ${HAVE_STRLCPY} -eq 0 ]; then
437 	echo "extern	size_t	 strlcpy(char*, const char*, size_t);"
438 	COBJS="${COBJS} compat/strlcpy.o"
439 fi
440 if [ ${HAVE_STRTONUM} -eq 0 ]; then
441 	echo "extern	long long strtonum(const char*, long long, long long, const char**);"
442 	COBJS="${COBJS} compat/strtonum.o"
443 fi
444 if [ ${HAVE_VASPRINTF} -eq 0 ]; then
445 	echo "extern	int	 vasprintf(char**, const char*, va_list);"
446 	COBJS="${COBJS} compat/vasprintf.o"
447 fi
448 
449 cat <<__HEREDOC__
450 
451 #ifndef __dead
452 #define __dead __attribute__((noreturn))
453 #endif
454 
455 /* Linux and OpenBSD have LOGIN_NAME_MAX, FreeBSD MAXLOGNAME. */
456 #ifndef LOGIN_NAME_MAX
457 # if defined(MAXLOGNAME)
458 #  define LOGIN_NAME_MAX MAXLOGNAME
459 # elif defined(_POSIX_LOGIN_NAME_MAX)
460 #  define LOGIN_NAME_MAX _POSIX_LOGIN_NAME_MAX
461 # else
462 #  define LOGIN_NAME_MAX 32
463 # endif
464 #endif
465 
466 #ifndef HOST_NAME_MAX
467 # if defined(_POSIX_HOST_NAME_MAX)
468 #  define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
469 # else
470 #  define HOST_NAME_MAX 255
471 # endif
472 #endif
473 __HEREDOC__
474 
475 echo "file config.h: written" 1>&2
476 echo "file config.h: written" 1>&3
477 
478 # --------
479 # tests for Makefile.local
480 
481 exec > Makefile.local
482 
483 [ -z "${BINDIR}"          ] && BINDIR="${PREFIX}/bin"
484 [ -z "${MANDIR}"          ] && MANDIR="${PREFIX}/man"
485 
486 [ -z "${INSTALL_PROGRAM}" ] && INSTALL_PROGRAM="${INSTALL} -m 0555"
487 [ -z "${INSTALL_LIB}"     ] && INSTALL_LIB="${INSTALL} -m 0444"
488 [ -z "${INSTALL_MAN}"     ] && INSTALL_MAN="${INSTALL} -m 0444"
489 [ -z "${INSTALL_DATA}"    ] && INSTALL_DATA="${INSTALL} -m 0444"
490 
491 cat << __HEREDOC__
492 CC		= ${CC}
493 CFLAGS		= ${CFLAGS}
494 LDFLAGS		= ${LDFLAGS} ${LD_IMSG}
495 YACC		= ${YACC}
496 STATIC		= ${STATIC}
497 PREFIX		= ${PREFIX}
498 BINDIR		= ${BINDIR}
499 MANDIR		= ${MANDIR}
500 INCLUDEDIR	= ${INCLUDEDIR}
501 INSTALL		= ${INSTALL}
502 INSTALL_PROGRAM	= ${INSTALL_PROGRAM}
503 INSTALL_LIB	= ${INSTALL_LIB}
504 INSTALL_MAN	= ${INSTALL_MAN}
505 INSTALL_DATA	= ${INSTALL_DATA}
506 
507 COBJS		= ${COBJS}
508 
509 VERSION		= ${VERSION}
510 
511 __HEREDOC__
512 
513 echo "file Makefile.local: written" 1>&2
514 echo "file Makefile.local: written" 1>&3
515 
516 exit 0