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 runtest err		ERR		|| true
248 runtest explicit_bzero	EXPLICIT_BZERO	|| true
249 runtest freezero	FREEZERO	|| true
250 runtest getdtablecount	GETDTABLECOUNT	|| true
251 runtest getdtablesize	GETDTABLESIZE	|| true
252 runtest getprogname	GETPROGNAME	|| true
253 runtest imsg		IMSG		-lutil || true
254 runtest libevent	LIBEVENT	|| true
255 runtest libevent2	LIBEVENT2	|| true
256 runtest libtls		LIBTLS		|| true
257 runtest memmem		MEMMEM		"" -D_GNU_SOURCE || true
258 runtest openssl		OPENSSL		|| true
259 runtest pr_set_name	PR_SET_NAME	|| true
260 runtest program_invocation_short_name PROGRAM_INVOCATION_SHORT_NAME "" -D_GNU_SOURCE || true
261 runtest queue_h		QUEUE_H		|| true
262 runtest reallocarray	REALLOCARRAY	|| true
263 runtest recallocarray	RECALLOCARRAY	|| true
264 runtest setproctitle	SETPROCTITLE	|| true
265 runtest setresgid	SETRESGID	"" -D_GNU_SOURCE || true
266 runtest setresuid	SETRESUID	"" -D_GNU_SOURCE || true
267 runtest strlcat		STRLCAT		|| true
268 runtest strlcpy		STRLCPY		|| true
269 runtest strtonum	STRTONUM	|| true
270 runtest tree_h		TREE_H		|| true
271 runtest vasprintf	VASPRINTF	"" -D_GNU_SOURCE || true
272 
273 if [ ${HAVE_LIBTLS} -eq 0 ]; then
274 	echo "FATAL: libtls not found" 1>&2
275 	echo "FATAL: libtls not found" 1>&3
276 	exit 1
277 fi
278 
279 if [ ${HAVE_OPENSSL} -eq 0 ]; then
280 	echo "FATAL: openssl not found" 1>&2
281 	echo "FATAL: openssl not found" 1>&3
282 	exit 1
283 fi
284 
285 if [ ${HAVE_LIBEVENT} -eq 0 ]; then
286 	echo "FATAL: libevent not found" 1>&2
287 	echo "FATAL: libevent not found" 1>&3
288 	exit 1
289 fi
290 
291 if [ ${HAVE_QUEUE_H} -eq 0 -o ${HAVE_IMSG} -eq 0 -o ${HAVE_TREE_H} -eq 0 ]; then
292 	CFLAGS="${CFLAGS} -I ${PWD}/compat"
293 fi
294 
295 # --------
296 # write config.h
297 
298 exec > config.h
299 
300 cat <<__HEREDOC__
301 #ifdef __cplusplus
302 #error "Do not use C++."
303 #endif
304 __HEREDOC__
305 
306 [ ${NEED_GNU_SOURCE} -eq 0 ] || echo "#define _GNU_SOURCE"
307 [ ${NEED_OPENBSD_SOURCE} -eq 0 ] || echo "#define _OPENBSD_SOURCE"
308 
309 [ ${HAVE_STRLCAT} -eq 0 -o ${HAVE_STRLCPY} -eq 0 -o ${HAVE_IMSG} -eq 0 ] \
310 	&& echo "#include <sys/types.h>"
311 [ ${HAVE_VASPRINTF} -eq 0 ] && echo "#include <stdarg.h>"
312 
313 if [ ${HAVE_QUEUE_H} -eq 1 ]; then
314 	echo "#include <sys/queue.h>"
315 else
316 	echo "#include <queue.h>"
317 fi
318 
319 if [ ${HAVE_TREE_H} -eq 1 ]; then
320 	echo "#include <sys/tree.h>"
321 else
322 	echo "#include <tree.h>"
323 fi
324 
325 echo "#include <sys/types.h>"
326 echo "#include <sys/uio.h>"
327 echo "#include <stdint.h>"
328 echo "#include <imsg.h>"
329 echo "#include <limits.h>"
330 
331 cat <<__HEREDOC__
332 
333 #define VERSION			"${VERSION}"
334 #define DISABLE_SANDBOX		${DISABLE_SANDBOX}
335 
336 #define HAVE_ERR		${HAVE_ERR}
337 #define HAVE_EXPLICIT_BZERO	${HAVE_EXPLICIT_BZERO}
338 #define HAVE_FREEZERO		${HAVE_FREEZERO}
339 #define HAVE_GETDTABLECOUNT	${HAVE_GETDTABLECOUNT}
340 #define HAVE_GETDTABLESIZE	${HAVE_GETDTABLESIZE}
341 #define HAVE_GETPROGNAME	${HAVE_GETPROGNAME}
342 #define HAVE_IMSG		${HAVE_IMSG}
343 #define HAVE_LIBEVENT		${HAVE_LIBEVENT}
344 #define HAVE_LIBEVENT2		${HAVE_LIBEVENT2}
345 #define HAVE_PROGRAM_INVOCATION_SHORT_NAME ${HAVE_PROGRAM_INVOCATION_SHORT_NAME}
346 #define HAVE_PR_SET_NAME	${HAVE_PR_SET_NAME}
347 #define HAVE_QUEUE_H		${HAVE_QUEUE_H}
348 #define HAVE_REALLOCARRAY	${HAVE_REALLOCARRAY}
349 #define HAVE_RECALLOCARRAY	${HAVE_RECALLOCARRAY}
350 #define HAVE_SETPROCTITLE	${HAVE_SETPROCTITLE}
351 #define HAVE_SETRESGID		${HAVE_SETRESGID}
352 #define HAVE_SETRESUID		${HAVE_SETRESUID}
353 #define HAVE_STRLCAT		${HAVE_STRLCAT}
354 #define HAVE_STRLCPY		${HAVE_STRLCPY}
355 #define HAVE_STRTONUM		${HAVE_STRTONUM}
356 #define HAVE_TREE_H		${HAVE_TREE_H}
357 #define HAVE_VASPRINTF		${HAVE_VASPRINTF}
358 
359 __HEREDOC__
360 
361 [ ${HAVE_EXPLICIT_BZERO} -eq 0 -o \
362   ${HAVE_FREEZERO} -eq 0 -o \
363   ${HAVE_REALLOCARRAY} -eq 0 -o \
364   ${HAVE_RECALLOCARRAY} -eq 0 -o \
365   ${HAVE_STRLCAT} -eq 0 -o \
366   ${HAVE_STRLCPY} -eq 0 -o \
367   ${HAVE_STRTONUM} -eq 0 ] && echo "#include <stddef.h>"
368 
369 [ ${HAVE_SETRESGID} -eq 0 -o \
370   ${HAVE_SETRESUID} -eq 0 ] && echo "#include <unistd.h>"
371 
372 if [ ${HAVE_ERR} -eq 0 ]; then
373 	echo "extern	void	 err(int, const char*, ...);"
374 	echo "extern	void	 errx(int, const char*, ...);"
375 	echo "extern	void	 warn(const char*, ...);"
376 	echo "extern	void	 warnx(const char*, ...);"
377 	COBJS="${COBJS} compat/err.o"
378 else
379 	echo "#include <err.h>"
380 fi
381 if [ ${HAVE_EXPLICIT_BZERO} -eq 0 ]; then
382 	echo "extern	void	 explicit_bzero(void*, size_t);"
383 	COBJS="${COBJS} compat/explicit_bzero.o"
384 fi
385 if [ ${HAVE_FREEZERO} -eq 0 ]; then
386 	echo "extern	void	 freezero(void*, size_t);"
387 	COBJS="${COBJS} compat/freezero.o"
388 fi
389 if [ ${HAVE_GETDTABLECOUNT} -eq 0 ]; then
390 	echo "extern	int	 getdtablecount(void);"
391 	COBJS="${COBJS} compat/getdtablecount.o"
392 fi
393 if [ ${HAVE_GETDTABLESIZE} -eq 0 ]; then
394 	echo "extern	int	 getdtablesize(void);"
395 	COBJS="${COBJS} compat/getdtablesize.o"
396 fi
397 if [ ${HAVE_GETPROGNAME} -eq 0 ]; then
398 	echo "extern	const char *getprogname(void);"
399 	COBJS="${COBJS} compat/getprogname.o"
400 fi
401 if [ ${HAVE_IMSG} -eq 0 ]; then
402 	COBJS="${COBJS} compat/imsg.o compat/imsg-buffer.o"
403 fi
404 if [ ${HAVE_MEMMEM} -eq 0 ]; then
405 	echo "extern void *memmem(const void *, size_t, const void *, size_t);"
406 	COBJS="${COBJS} compat/memmem.o"
407 fi
408 if [ ${HAVE_REALLOCARRAY} -eq 0 ]; then
409 	echo "extern	void	*reallocarray(void*, size_t, size_t);"
410 	COBJS="${COBJS} compat/reallocarray.o"
411 fi
412 if [ ${HAVE_RECALLOCARRAY} -eq 0 ]; then
413 	echo "extern	void	*recallocarray(void*, size_t, size_t, size_t);"
414 	COBJS="${COBJS} compat/recallocarray.o"
415 fi
416 if [ ${HAVE_SETPROCTITLE} -eq 0 ]; then
417 	echo "extern	void	 setproctitle(const char *fmt, ...);"
418 	COBJS="${COBJS} compat/setproctitle.o"
419 fi
420 if [ ${HAVE_SETRESGID} -eq 0 ]; then
421 	echo "extern	int	 setresgid(gid_t, gid_t, gid_t);"
422 	COBJS="${COBJS} compat/setresgid.o"
423 fi
424 if [ ${HAVE_SETRESUID} -eq 0 ]; then
425 	echo "extern	int	 setresuid(uid_t, uid_t, uid_t);"
426 	COBJS="${COBJS} compat/setresuid.o"
427 fi
428 if [ ${HAVE_STRLCAT} -eq 0 ]; then
429 	echo "extern	size_t	 strlcat(char*, const char*, size_t);"
430 	COBJS="${COBJS} compat/strlcat.o"
431 fi
432 if [ ${HAVE_STRLCPY} -eq 0 ]; then
433 	echo "extern	size_t	 strlcpy(char*, const char*, size_t);"
434 	COBJS="${COBJS} compat/strlcpy.o"
435 fi
436 if [ ${HAVE_STRTONUM} -eq 0 ]; then
437 	echo "extern	long long strtonum(const char*, long long, long long, const char**);"
438 	COBJS="${COBJS} compat/strtonum.o"
439 fi
440 if [ ${HAVE_VASPRINTF} -eq 0 ]; then
441 	echo "extern	int	 vasprintf(char**, const char*, va_list);"
442 	COBJS="${COBJS} compat/vasprintf.o"
443 fi
444 
445 cat <<__HEREDOC__
446 
447 #ifndef __dead
448 #define __dead __attribute__((noreturn))
449 #endif
450 
451 /* Linux and OpenBSD have LOGIN_NAME_MAX, FreeBSD MAXLOGNAME. */
452 #ifndef LOGIN_NAME_MAX
453 # if defined(MAXLOGNAME)
454 #  define LOGIN_NAME_MAX MAXLOGNAME
455 # elif defined(_POSIX_LOGIN_NAME_MAX)
456 #  define LOGIN_NAME_MAX _POSIX_LOGIN_NAME_MAX
457 # else
458 #  define LOGIN_NAME_MAX 32
459 # endif
460 #endif
461 
462 #ifndef HOST_NAME_MAX
463 # if defined(_POSIX_HOST_NAME_MAX)
464 #  define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
465 # else
466 #  define HOST_NAME_MAX 255
467 # endif
468 #endif
469 __HEREDOC__
470 
471 echo "file config.h: written" 1>&2
472 echo "file config.h: written" 1>&3
473 
474 # --------
475 # tests for Makefile.local
476 
477 exec > Makefile.local
478 
479 [ -z "${BINDIR}"          ] && BINDIR="${PREFIX}/bin"
480 [ -z "${MANDIR}"          ] && MANDIR="${PREFIX}/man"
481 
482 [ -z "${INSTALL_PROGRAM}" ] && INSTALL_PROGRAM="${INSTALL} -m 0555"
483 [ -z "${INSTALL_LIB}"     ] && INSTALL_LIB="${INSTALL} -m 0444"
484 [ -z "${INSTALL_MAN}"     ] && INSTALL_MAN="${INSTALL} -m 0444"
485 [ -z "${INSTALL_DATA}"    ] && INSTALL_DATA="${INSTALL} -m 0444"
486 
487 cat << __HEREDOC__
488 CC		= ${CC}
489 CFLAGS		= ${CFLAGS}
490 LDFLAGS		= ${LDFLAGS} ${LD_IMSG}
491 YACC		= ${YACC}
492 STATIC		= ${STATIC}
493 PREFIX		= ${PREFIX}
494 BINDIR		= ${BINDIR}
495 MANDIR		= ${MANDIR}
496 INCLUDEDIR	= ${INCLUDEDIR}
497 INSTALL		= ${INSTALL}
498 INSTALL_PROGRAM	= ${INSTALL_PROGRAM}
499 INSTALL_LIB	= ${INSTALL_LIB}
500 INSTALL_MAN	= ${INSTALL_MAN}
501 INSTALL_DATA	= ${INSTALL_DATA}
502 
503 COBJS		= ${COBJS}
504 
505 VERSION		= ${VERSION}
506 
507 __HEREDOC__
508 
509 echo "file Makefile.local: written" 1>&2
510 echo "file Makefile.local: written" 1>&3
511 
512 exit 0