crunchgen.c revision 164654 
1/*
2 * Copyright (c) 1994 University of Maryland
3 * All Rights Reserved.
4 *
5 * Permission to use, copy, modify, distribute, and sell this software and its
6 * documentation for any purpose is hereby granted without fee, provided that
7 * the above copyright notice appear in all copies and that both that
8 * copyright notice and this permission notice appear in supporting
9 * documentation, and that the name of U.M. not be used in advertising or
10 * publicity pertaining to distribution of the software without specific,
11 * written prior permission.  U.M. makes no representations about the
12 * suitability of this software for any purpose.  It is provided "as is"
13 * without express or implied warranty.
14 *
15 * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.
17 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
19 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
20 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 *
22 * Author: James da Silva, Systems Design and Analysis Group
23 *			   Computer Science Department
24 *			   University of Maryland at College Park
25 *
26 * $FreeBSD: head/usr.sbin/crunch/crunchgen/crunchgen.c 164654 2006-11-27 01:35:11Z jb $
27 */
28/*
29 * ========================================================================
30 * crunchgen.c
31 *
32 * Generates a Makefile and main C file for a crunched executable,
33 * from specs given in a .conf file.
34 */
35#include <sys/types.h>
36#include <sys/stat.h>
37#include <sys/param.h>
38
39#include <ctype.h>
40#include <err.h>
41#include <paths.h>
42#include <stdio.h>
43#include <stdlib.h>
44#include <string.h>
45#include <unistd.h>
46
47#define CRUNCH_VERSION	"0.2"
48
49#define MAXLINELEN	16384
50#define MAXFIELDS 	 2048
51
52
53/* internal representation of conf file: */
54
55/* simple lists of strings suffice for most parms */
56
57typedef struct strlst {
58	struct strlst *next;
59	char *str;
60} strlst_t;
61
62/* progs have structure, each field can be set with "special" or calculated */
63
64typedef struct prog {
65	struct prog *next;	/* link field */
66	char *name;		/* program name */
67	char *ident;		/* C identifier for the program name */
68	char *srcdir;
69	char *realsrcdir;
70	char *objdir;
71	char *objvar;		/* Makefile variable to replace OBJS */
72	strlst_t *objs, *objpaths;
73	strlst_t *buildopts;
74	strlst_t *keeplist;
75	strlst_t *links;
76	strlst_t *libs;
77	strlst_t *libs_so;
78	int goterror;
79} prog_t;
80
81
82/* global state */
83
84strlst_t *buildopts = NULL;
85strlst_t *srcdirs   = NULL;
86strlst_t *libs      = NULL;
87strlst_t *libs_so   = NULL;
88prog_t   *progs     = NULL;
89
90char confname[MAXPATHLEN], infilename[MAXPATHLEN];
91char outmkname[MAXPATHLEN], outcfname[MAXPATHLEN], execfname[MAXPATHLEN];
92char tempfname[MAXPATHLEN], cachename[MAXPATHLEN], curfilename[MAXPATHLEN];
93char outhdrname[MAXPATHLEN] ;	/* user-supplied header for *.mk */
94char *objprefix;		/* where are the objects ? */
95int linenum = -1;
96int goterror = 0;
97
98int verbose, readcache;		/* options */
99int reading_cache;
100int makeobj = 0;		/* add 'make obj' rules to the makefile */
101
102int list_mode;
103
104/* general library routines */
105
106void status(char *str);
107void out_of_memory(void);
108void add_string(strlst_t **listp, char *str);
109int is_dir(char *pathname);
110int is_nonempty_file(char *pathname);
111int subtract_strlst(strlst_t **lista, strlst_t **listb);
112int in_list(strlst_t **listp, char *str);
113
114/* helper routines for main() */
115
116void usage(void);
117void parse_conf_file(void);
118void gen_outputs(void);
119
120
121int main(int argc, char **argv)
122{
123	char *p;
124	int optc;
125
126	verbose = 1;
127	readcache = 1;
128	*outmkname = *outcfname = *execfname = '\0';
129
130	p = getenv("MAKEOBJDIRPREFIX");
131	if (p == NULL || *p == '\0')
132		objprefix = "/usr/obj"; /* default */
133	else
134		if ((objprefix = strdup(p)) == NULL)
135			out_of_memory();
136
137	while((optc = getopt(argc, argv, "lh:m:c:e:p:foq")) != -1) {
138		switch(optc) {
139		case 'f':
140			readcache = 0;
141			break;
142		case 'o':
143			makeobj = 1;
144			break;
145		case 'q':
146			verbose = 0;
147			break;
148
149		case 'm':
150			strlcpy(outmkname, optarg, sizeof(outmkname));
151			break;
152		case 'p':
153			if ((objprefix = strdup(optarg)) == NULL)
154				out_of_memory();
155			break;
156
157		case 'h':
158			strlcpy(outhdrname, optarg, sizeof(outhdrname));
159			break;
160		case 'c':
161			strlcpy(outcfname, optarg, sizeof(outcfname));
162			break;
163		case 'e':
164			strlcpy(execfname, optarg, sizeof(execfname));
165			break;
166
167		case 'l':
168			list_mode++;
169			verbose = 0;
170			break;
171
172		case '?':
173		default:
174			usage();
175		}
176	}
177
178	argc -= optind;
179	argv += optind;
180
181	if (argc != 1)
182		usage();
183
184	/*
185	 * generate filenames
186	 */
187
188	strlcpy(infilename, argv[0], sizeof(infilename));
189
190	/* confname = `basename infilename .conf` */
191
192	if ((p=strrchr(infilename, '/')) != NULL)
193		strlcpy(confname, p + 1, sizeof(confname));
194	else
195		strlcpy(confname, infilename, sizeof(confname));
196
197	if ((p=strrchr(confname, '.')) != NULL && !strcmp(p, ".conf"))
198		*p = '\0';
199
200	if (!*outmkname)
201		snprintf(outmkname, sizeof(outmkname), "%s.mk", confname);
202	if (!*outcfname)
203		snprintf(outcfname, sizeof(outcfname), "%s.c", confname);
204	if (!*execfname)
205		snprintf(execfname, sizeof(execfname), "%s", confname);
206
207	snprintf(cachename, sizeof(cachename), "%s.cache", confname);
208	snprintf(tempfname, sizeof(tempfname), "%s/crunchgen_%sXXXXXX",
209	getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP, confname);
210
211	parse_conf_file();
212	if (list_mode)
213		exit(goterror);
214
215	gen_outputs();
216
217	exit(goterror);
218}
219
220
221void usage(void)
222{
223	fprintf(stderr, "%s%s\n\t%s%s\n", "usage: crunchgen [-foq] ",
224	    "[-h <makefile-header-name>] [-m <makefile>]",
225	    "[-p <obj-prefix>] [-c <c-file-name>] [-e <exec-file>] ",
226	    "<conffile>");
227	exit(1);
228}
229
230
231/*
232 * ========================================================================
233 * parse_conf_file subsystem
234 *
235 */
236
237/* helper routines for parse_conf_file */
238
239void parse_one_file(char *filename);
240void parse_line(char *line, int *fc, char **fv, int nf);
241void add_srcdirs(int argc, char **argv);
242void add_progs(int argc, char **argv);
243void add_link(int argc, char **argv);
244void add_libs(int argc, char **argv);
245void add_libs_so(int argc, char **argv);
246void add_buildopts(int argc, char **argv);
247void add_special(int argc, char **argv);
248
249prog_t *find_prog(char *str);
250void add_prog(char *progname);
251
252
253void parse_conf_file(void)
254{
255	if (!is_nonempty_file(infilename))
256		errx(1, "fatal: input file \"%s\" not found", infilename);
257
258	parse_one_file(infilename);
259	if (readcache && is_nonempty_file(cachename)) {
260		reading_cache = 1;
261		parse_one_file(cachename);
262	}
263}
264
265
266void parse_one_file(char *filename)
267{
268	char *fieldv[MAXFIELDS];
269	int fieldc;
270	void (*f)(int c, char **v);
271	FILE *cf;
272	char line[MAXLINELEN];
273
274	snprintf(line, sizeof(line), "reading %s", filename);
275	status(line);
276	strlcpy(curfilename, filename, sizeof(curfilename));
277
278	if ((cf = fopen(curfilename, "r")) == NULL) {
279		warn("%s", curfilename);
280		goterror = 1;
281		return;
282	}
283
284	linenum = 0;
285	while (fgets(line, MAXLINELEN, cf) != NULL) {
286		linenum++;
287		parse_line(line, &fieldc, fieldv, MAXFIELDS);
288
289		if (fieldc < 1)
290			continue;
291
292		if (!strcmp(fieldv[0], "srcdirs"))
293			f = add_srcdirs;
294		else if(!strcmp(fieldv[0], "progs"))
295			f = add_progs;
296		else if(!strcmp(fieldv[0], "ln"))
297			f = add_link;
298		else if(!strcmp(fieldv[0], "libs"))
299			f = add_libs;
300		else if(!strcmp(fieldv[0], "libs_so"))
301			f = add_libs_so;
302		else if(!strcmp(fieldv[0], "buildopts"))
303			f = add_buildopts;
304		else if(!strcmp(fieldv[0], "special"))
305			f = add_special;
306		else {
307			warnx("%s:%d: skipping unknown command `%s'",
308			    curfilename, linenum, fieldv[0]);
309			goterror = 1;
310			continue;
311		}
312
313		if (fieldc < 2) {
314			warnx("%s:%d: %s %s",
315			    curfilename, linenum, fieldv[0],
316			    "command needs at least 1 argument, skipping");
317			goterror = 1;
318			continue;
319		}
320
321		f(fieldc, fieldv);
322	}
323
324	if (ferror(cf)) {
325		warn("%s", curfilename);
326		goterror = 1;
327	}
328	fclose(cf);
329}
330
331
332void parse_line(char *line, int *fc, char **fv, int nf)
333{
334	char *p;
335
336	p = line;
337	*fc = 0;
338
339	while (1) {
340		while (isspace(*p))
341			p++;
342
343		if (*p == '\0' || *p == '#')
344			break;
345
346		if (*fc < nf)
347			fv[(*fc)++] = p;
348
349		while (*p && !isspace(*p) && *p != '#')
350			p++;
351
352		if (*p == '\0' || *p == '#')
353			break;
354
355		*p++ = '\0';
356	}
357
358	if (*p)
359		*p = '\0';		/* needed for '#' case */
360}
361
362
363void add_srcdirs(int argc, char **argv)
364{
365	int i;
366
367	for (i = 1; i < argc; i++) {
368		if (is_dir(argv[i]))
369			add_string(&srcdirs, argv[i]);
370		else {
371			warnx("%s:%d: `%s' is not a directory, skipping it",
372			    curfilename, linenum, argv[i]);
373			goterror = 1;
374		}
375	}
376}
377
378
379void add_progs(int argc, char **argv)
380{
381	int i;
382
383	for (i = 1; i < argc; i++)
384		add_prog(argv[i]);
385}
386
387
388void add_prog(char *progname)
389{
390	prog_t *p1, *p2;
391
392	/* add to end, but be smart about dups */
393
394	for (p1 = NULL, p2 = progs; p2 != NULL; p1 = p2, p2 = p2->next)
395		if (!strcmp(p2->name, progname))
396			return;
397
398	p2 = malloc(sizeof(prog_t));
399	if(p2) {
400		memset(p2, 0, sizeof(prog_t));
401		p2->name = strdup(progname);
402	}
403	if (!p2 || !p2->name)
404		out_of_memory();
405
406	p2->next = NULL;
407	if (p1 == NULL)
408		progs = p2;
409	else
410		p1->next = p2;
411
412	p2->ident = NULL;
413	p2->srcdir = NULL;
414	p2->realsrcdir = NULL;
415	p2->objdir = NULL;
416	p2->links = NULL;
417	p2->libs = NULL;
418	p2->libs_so = NULL;
419	p2->objs = NULL;
420	p2->keeplist = NULL;
421	p2->buildopts = NULL;
422	p2->goterror = 0;
423
424	if (list_mode)
425		printf("%s\n",progname);
426}
427
428
429void add_link(int argc, char **argv)
430{
431	int i;
432	prog_t *p = find_prog(argv[1]);
433
434	if (p == NULL) {
435		warnx("%s:%d: no prog %s previously declared, skipping link",
436		    curfilename, linenum, argv[1]);
437		goterror = 1;
438		return;
439	}
440
441	for (i = 2; i < argc; i++) {
442		if (list_mode)
443			printf("%s\n",argv[i]);
444
445		add_string(&p->links, argv[i]);
446	}
447}
448
449
450void add_libs(int argc, char **argv)
451{
452	int i;
453
454	for(i = 1; i < argc; i++) {
455		add_string(&libs, argv[i]);
456		if ( in_list(&libs_so, argv[i]) )
457			warnx("%s:%d: "
458				"library `%s' specified as dynamic earlier",
459				curfilename, linenum, argv[i]);
460	}
461}
462
463
464void add_libs_so(int argc, char **argv)
465{
466	int i;
467
468	for(i = 1; i < argc; i++) {
469		add_string(&libs_so, argv[i]);
470		if ( in_list(&libs, argv[i]) )
471			warnx("%s:%d: "
472				"library `%s' specified as static earlier",
473				curfilename, linenum, argv[i]);
474	}
475}
476
477
478void add_buildopts(int argc, char **argv)
479{
480	int i;
481
482	for (i = 1; i < argc; i++)
483		add_string(&buildopts, argv[i]);
484}
485
486
487void add_special(int argc, char **argv)
488{
489	int i;
490	prog_t *p = find_prog(argv[1]);
491
492	if (p == NULL) {
493		if (reading_cache)
494			return;
495
496		warnx("%s:%d: no prog %s previously declared, skipping special",
497		    curfilename, linenum, argv[1]);
498		goterror = 1;
499		return;
500	}
501
502	if (!strcmp(argv[2], "ident")) {
503		if (argc != 4)
504			goto argcount;
505		if ((p->ident = strdup(argv[3])) == NULL)
506			out_of_memory();
507	} else if (!strcmp(argv[2], "srcdir")) {
508		if (argc != 4)
509			goto argcount;
510		if ((p->srcdir = strdup(argv[3])) == NULL)
511			out_of_memory();
512	} else if (!strcmp(argv[2], "objdir")) {
513		if(argc != 4)
514			goto argcount;
515		if((p->objdir = strdup(argv[3])) == NULL)
516			out_of_memory();
517	} else if (!strcmp(argv[2], "objs")) {
518		p->objs = NULL;
519		for (i = 3; i < argc; i++)
520			add_string(&p->objs, argv[i]);
521	} else if (!strcmp(argv[2], "objpaths")) {
522		p->objpaths = NULL;
523		for (i = 3; i < argc; i++)
524			add_string(&p->objpaths, argv[i]);
525	} else if (!strcmp(argv[2], "keep")) {
526		p->keeplist = NULL;
527		for(i = 3; i < argc; i++)
528			add_string(&p->keeplist, argv[i]);
529	} else if (!strcmp(argv[2], "objvar")) {
530		if(argc != 4)
531			goto argcount;
532		if ((p->objvar = strdup(argv[3])) == NULL)
533			out_of_memory();
534	} else if (!strcmp(argv[2], "buildopts")) {
535		p->buildopts = NULL;
536		for (i = 3; i < argc; i++)
537			add_string(&p->buildopts, argv[i]);
538	} else if (!strcmp(argv[2], "lib")) {
539		for (i = 3; i < argc; i++)
540			add_string(&p->libs, argv[i]);
541	} else {
542		warnx("%s:%d: bad parameter name `%s', skipping line",
543		    curfilename, linenum, argv[2]);
544		goterror = 1;
545	}
546	return;
547
548 argcount:
549	warnx("%s:%d: too %s arguments, expected \"special %s %s <string>\"",
550	    curfilename, linenum, argc < 4? "few" : "many", argv[1], argv[2]);
551	goterror = 1;
552}
553
554
555prog_t *find_prog(char *str)
556{
557	prog_t *p;
558
559	for (p = progs; p != NULL; p = p->next)
560		if (!strcmp(p->name, str))
561			return p;
562
563	return NULL;
564}
565
566
567/*
568 * ========================================================================
569 * gen_outputs subsystem
570 *
571 */
572
573/* helper subroutines */
574
575void remove_error_progs(void);
576void fillin_program(prog_t *p);
577void gen_specials_cache(void);
578void gen_output_makefile(void);
579void gen_output_cfile(void);
580
581void fillin_program_objs(prog_t *p, char *path);
582void top_makefile_rules(FILE *outmk);
583void prog_makefile_rules(FILE *outmk, prog_t *p);
584void output_strlst(FILE *outf, strlst_t *lst);
585char *genident(char *str);
586char *dir_search(char *progname);
587
588
589void gen_outputs(void)
590{
591	prog_t *p;
592
593	for (p = progs; p != NULL; p = p->next)
594		fillin_program(p);
595
596	remove_error_progs();
597	gen_specials_cache();
598	gen_output_cfile();
599	gen_output_makefile();
600	status("");
601	fprintf(stderr,
602	    "Run \"make -f %s\" to build crunched binary.\n", outmkname);
603}
604
605/*
606 * run the makefile for the program to find which objects are necessary
607 */
608void fillin_program(prog_t *p)
609{
610	char path[MAXPATHLEN];
611	char line[MAXLINELEN];
612	FILE *f;
613
614	snprintf(line, MAXLINELEN, "filling in parms for %s", p->name);
615	status(line);
616
617	if (!p->ident)
618		p->ident = genident(p->name);
619
620	/* look for the source directory if one wasn't specified by a special */
621	if (!p->srcdir) {
622		p->srcdir = dir_search(p->name);
623	}
624
625	/* Determine the actual srcdir (maybe symlinked). */
626	if (p->srcdir) {
627		snprintf(line, MAXLINELEN, "cd %s && echo -n `/bin/pwd`",
628		    p->srcdir);
629		f = popen(line,"r");
630		if (!f)
631			errx(1, "Can't execute: %s\n", line);
632
633		path[0] = '\0';
634		fgets(path, sizeof path, f);
635		if (pclose(f))
636			errx(1, "Can't execute: %s\n", line);
637
638		if (!*path)
639			errx(1, "Can't perform pwd on: %s\n", p->srcdir);
640
641		p->realsrcdir = strdup(path);
642	}
643
644	/* Unless the option to make object files was specified the
645	* the objects will be built in the source directory unless
646	* an object directory already exists.
647	*/
648	if (!makeobj && !p->objdir && p->srcdir) {
649		snprintf(line, sizeof line, "%s/%s", objprefix, p->realsrcdir);
650		if (is_dir(line)) {
651			if ((p->objdir = strdup(line)) == NULL)
652			out_of_memory();
653		} else
654			p->objdir = p->realsrcdir;
655	}
656
657	/*
658	* XXX look for a Makefile.{name} in local directory first.
659	* This lets us override the original Makefile.
660	*/
661	snprintf(path, sizeof(path), "Makefile.%s", p->name);
662	if (is_nonempty_file(path)) {
663		snprintf(line, MAXLINELEN, "Using %s for %s", path, p->name);
664		status(line);
665	} else
666		if (p->srcdir)
667			snprintf(path, sizeof(path), "%s/Makefile", p->srcdir);
668	if (!p->objs && p->srcdir && is_nonempty_file(path))
669		fillin_program_objs(p, path);
670
671	if (!p->srcdir && !p->objdir && verbose)
672		warnx("%s: %s: %s",
673		    "warning: could not find source directory",
674		    infilename, p->name);
675	if (!p->objs && verbose)
676		warnx("%s: %s: warning: could not find any .o files",
677		    infilename, p->name);
678
679	if ((!p->srcdir || !p->objdir) && !p->objs)
680		p->goterror = 1;
681}
682
683void fillin_program_objs(prog_t *p, char *path)
684{
685	char *obj, *cp;
686	int fd, rc;
687	FILE *f;
688	char *objvar="OBJS";
689	strlst_t *s;
690	char line[MAXLINELEN];
691
692	/* discover the objs from the srcdir Makefile */
693
694	if ((fd = mkstemp(tempfname)) == -1) {
695		perror(tempfname);
696		exit(1);
697	}
698	if ((f = fdopen(fd, "w")) == NULL) {
699		warn("%s", tempfname);
700		goterror = 1;
701		return;
702	}
703	if (p->objvar)
704		objvar = p->objvar;
705
706	/*
707	* XXX include outhdrname (e.g. to contain Make variables)
708	*/
709	if (outhdrname[0] != '\0')
710		fprintf(f, ".include \"%s\"\n", outhdrname);
711	fprintf(f, ".include \"%s\"\n", path);
712	if (buildopts) {
713		fprintf(f, "BUILDOPTS+=");
714		output_strlst(f, buildopts);
715	}
716	fprintf(f, ".if defined(PROG) && !defined(%s)\n", objvar);
717	fprintf(f, "%s=${PROG}.o\n", objvar);
718	fprintf(f, ".endif\n");
719	fprintf(f, "loop:\n\t@echo 'OBJS= '${%s}\n", objvar);
720
721	fprintf(f, "crunchgen_objs:\n"
722	    "\t@cd %s && make -f %s $(BUILDOPTS) $(%s_OPTS)",
723	    p->srcdir, tempfname, p->ident);
724	for (s = p->buildopts; s != NULL; s = s->next)
725		fprintf(f, " %s", s->str);
726	fprintf(f, " loop\n");
727
728	fclose(f);
729
730	snprintf(line, MAXLINELEN, "cd %s && make -f %s crunchgen_objs",
731	    p->srcdir, tempfname);
732	if ((f = popen(line, "r")) == NULL) {
733		warn("submake pipe");
734		goterror = 1;
735		return;
736	}
737
738	while(fgets(line, MAXLINELEN, f)) {
739		if (strncmp(line, "OBJS= ", 6)) {
740			warnx("make error: %s", line);
741			goterror = 1;
742			continue;
743		}
744
745		cp = line + 6;
746		while (isspace(*cp))
747			cp++;
748
749		while(*cp) {
750			obj = cp;
751			while (*cp && !isspace(*cp))
752				cp++;
753			if (*cp)
754				*cp++ = '\0';
755			add_string(&p->objs, obj);
756			while (isspace(*cp))
757				cp++;
758		}
759	}
760
761	if ((rc=pclose(f)) != 0) {
762		warnx("make error: make returned %d", rc);
763		goterror = 1;
764	}
765
766	unlink(tempfname);
767}
768
769void remove_error_progs(void)
770{
771	prog_t *p1, *p2;
772
773	p1 = NULL; p2 = progs;
774	while (p2 != NULL) {
775		if (!p2->goterror)
776			p1 = p2, p2 = p2->next;
777		else {
778			/* delete it from linked list */
779			warnx("%s: %s: ignoring program because of errors",
780			    infilename, p2->name);
781			if (p1)
782				p1->next = p2->next;
783			else
784				progs = p2->next;
785			p2 = p2->next;
786		}
787	}
788}
789
790void gen_specials_cache(void)
791{
792	FILE *cachef;
793	prog_t *p;
794	char line[MAXLINELEN];
795
796	snprintf(line, MAXLINELEN, "generating %s", cachename);
797	status(line);
798
799	if ((cachef = fopen(cachename, "w")) == NULL) {
800		warn("%s", cachename);
801		goterror = 1;
802		return;
803	}
804
805	fprintf(cachef, "# %s - parm cache generated from %s by crunchgen "
806	    " %s\n\n",
807	    cachename, infilename, CRUNCH_VERSION);
808
809	for (p = progs; p != NULL; p = p->next) {
810		fprintf(cachef, "\n");
811		if (p->srcdir)
812			fprintf(cachef, "special %s srcdir %s\n",
813			    p->name, p->srcdir);
814		if (p->objdir)
815			fprintf(cachef, "special %s objdir %s\n",
816			    p->name, p->objdir);
817		if (p->objs) {
818			fprintf(cachef, "special %s objs", p->name);
819			output_strlst(cachef, p->objs);
820		}
821		if (p->objpaths) {
822			fprintf(cachef, "special %s objpaths", p->name);
823			output_strlst(cachef, p->objpaths);
824		}
825	}
826	fclose(cachef);
827}
828
829
830void gen_output_makefile(void)
831{
832	prog_t *p;
833	FILE *outmk;
834	char line[MAXLINELEN];
835
836	snprintf(line, MAXLINELEN, "generating %s", outmkname);
837	status(line);
838
839	if ((outmk = fopen(outmkname, "w")) == NULL) {
840		warn("%s", outmkname);
841		goterror = 1;
842		return;
843	}
844
845	fprintf(outmk, "# %s - generated from %s by crunchgen %s\n\n",
846	    outmkname, infilename, CRUNCH_VERSION);
847
848	if (outhdrname[0] != '\0')
849		fprintf(outmk, ".include \"%s\"\n", outhdrname);
850
851	top_makefile_rules(outmk);
852	for (p = progs; p != NULL; p = p->next)
853		prog_makefile_rules(outmk, p);
854
855	fprintf(outmk, "\n# ========\n");
856	fclose(outmk);
857}
858
859
860void gen_output_cfile(void)
861{
862	extern char *crunched_skel[];
863	char **cp;
864	FILE *outcf;
865	prog_t *p;
866	strlst_t *s;
867	char line[MAXLINELEN];
868
869	snprintf(line, MAXLINELEN, "generating %s", outcfname);
870	status(line);
871
872	if((outcf = fopen(outcfname, "w")) == NULL) {
873		warn("%s", outcfname);
874		goterror = 1;
875		return;
876	}
877
878	fprintf(outcf,
879	    "/* %s - generated from %s by crunchgen %s */\n",
880	    outcfname, infilename, CRUNCH_VERSION);
881
882	fprintf(outcf, "#define EXECNAME \"%s\"\n", execfname);
883	for (cp = crunched_skel; *cp != NULL; cp++)
884		fprintf(outcf, "%s\n", *cp);
885
886	for (p = progs; p != NULL; p = p->next)
887		fprintf(outcf, "extern int _crunched_%s_stub();\n", p->ident);
888
889	fprintf(outcf, "\nstruct stub entry_points[] = {\n");
890	for (p = progs; p != NULL; p = p->next) {
891		fprintf(outcf, "\t{ \"%s\", _crunched_%s_stub },\n",
892		    p->name, p->ident);
893		for (s = p->links; s != NULL; s = s->next)
894			fprintf(outcf, "\t{ \"%s\", _crunched_%s_stub },\n",
895			    s->str, p->ident);
896	}
897
898	fprintf(outcf, "\t{ EXECNAME, crunched_main },\n");
899	fprintf(outcf, "\t{ NULL, NULL }\n};\n");
900	fclose(outcf);
901}
902
903
904char *genident(char *str)
905{
906	char *n, *s, *d;
907
908	/*
909	 * generates a Makefile/C identifier from a program name,
910	 * mapping '-' to '_' and ignoring all other non-identifier
911	 * characters.  This leads to programs named "foo.bar" and
912	 * "foobar" to map to the same identifier.
913	 */
914
915	if ((n = strdup(str)) == NULL)
916		return NULL;
917	for (d = s = n; *s != '\0'; s++) {
918		if (*s == '-')
919			*d++ = '_';
920		else if (*s == '_' || isalnum(*s))
921			*d++ = *s;
922	}
923	*d = '\0';
924	return n;
925}
926
927
928char *dir_search(char *progname)
929{
930	char path[MAXPATHLEN];
931	strlst_t *dir;
932	char *srcdir;
933
934	for (dir = srcdirs; dir != NULL; dir = dir->next) {
935		snprintf(path, MAXPATHLEN, "%s/%s", dir->str, progname);
936		if (!is_dir(path))
937			continue;
938
939		if ((srcdir = strdup(path)) == NULL)
940			out_of_memory();
941
942		return srcdir;
943	}
944	return NULL;
945}
946
947
948void top_makefile_rules(FILE *outmk)
949{
950	prog_t *p;
951
952	if ( subtract_strlst(&libs, &libs_so) )
953		fprintf(outmk, "# NOTE: Some LIBS declarations below overridden by LIBS_SO\n");
954
955	fprintf(outmk, "LIBS+=");
956	output_strlst(outmk, libs);
957
958	fprintf(outmk, "LIBS_SO+=");
959	output_strlst(outmk, libs_so);
960
961	if (makeobj) {
962		fprintf(outmk, "MAKEOBJDIRPREFIX?=%s\n", objprefix);
963		fprintf(outmk, "MAKEENV=env MAKEOBJDIRPREFIX=$(MAKEOBJDIRPREFIX)\n");
964		fprintf(outmk, "CRUNCHMAKE=$(MAKEENV) $(MAKE)\n");
965	} else {
966		fprintf(outmk, "CRUNCHMAKE=$(MAKE)\n");
967	}
968
969	if (buildopts) {
970		fprintf(outmk, "BUILDOPTS+=");
971		output_strlst(outmk, buildopts);
972	}
973
974	fprintf(outmk, "CRUNCHED_OBJS=");
975	for (p = progs; p != NULL; p = p->next)
976		fprintf(outmk, " %s.lo", p->name);
977	fprintf(outmk, "\n");
978
979	fprintf(outmk, "SUBMAKE_TARGETS=");
980	for (p = progs; p != NULL; p = p->next)
981		fprintf(outmk, " %s_make", p->ident);
982	fprintf(outmk, "\nSUBCLEAN_TARGETS=");
983	for (p = progs; p != NULL; p = p->next)
984		fprintf(outmk, " %s_clean", p->ident);
985	fprintf(outmk, "\n\n");
986
987	fprintf(outmk, "all: objs exe\nobjs: $(SUBMAKE_TARGETS)\n");
988	fprintf(outmk, "exe: %s\n", execfname);
989	fprintf(outmk, "%s: %s.o $(CRUNCHED_OBJS) $(SUBMAKE_TARGETS)\n", execfname, execfname);
990	fprintf(outmk, ".if defined(LIBS_SO) && !empty(LIBS_SO)\n");
991	fprintf(outmk, "\t$(CC) -o %s %s.o $(CRUNCHED_OBJS) \\\n",
992	    execfname, execfname);
993	fprintf(outmk, "\t\t-Xlinker -Bstatic $(LIBS) \\\n");
994	fprintf(outmk, "\t\t-Xlinker -Bdynamic $(LIBS_SO)\n");
995	fprintf(outmk, ".else\n");
996	fprintf(outmk, "\t$(CC) -static -o %s %s.o $(CRUNCHED_OBJS) $(LIBS)\n",
997	    execfname, execfname);
998	fprintf(outmk, ".endif\n");
999	fprintf(outmk, "\tstrip %s\n", execfname);
1000	fprintf(outmk, "realclean: clean subclean\n");
1001	fprintf(outmk, "clean:\n\trm -f %s *.lo *.o *_stub.c\n", execfname);
1002	fprintf(outmk, "subclean: $(SUBCLEAN_TARGETS)\n");
1003}
1004
1005
1006void prog_makefile_rules(FILE *outmk, prog_t *p)
1007{
1008	strlst_t *lst;
1009
1010	fprintf(outmk, "\n# -------- %s\n\n", p->name);
1011
1012	fprintf(outmk, "%s_OBJDIR=", p->ident);
1013	if (p->objdir)
1014		fprintf(outmk, "%s", p->objdir);
1015	else
1016		fprintf(outmk, "$(MAKEOBJDIRPREFIX)/$(%s_REALSRCDIR)\n",
1017		    p->ident);
1018	fprintf(outmk, "\n");
1019
1020	fprintf(outmk, "%s_OBJPATHS=", p->ident);
1021	if (p->objpaths)
1022		output_strlst(outmk, p->objpaths);
1023	else {
1024		for (lst = p->objs; lst != NULL; lst = lst->next) {
1025			fprintf(outmk, " $(%s_OBJDIR)/%s", p->ident, lst->str);
1026		}
1027		fprintf(outmk, "\n");
1028	}
1029
1030	if (p->srcdir && p->objs) {
1031		fprintf(outmk, "%s_SRCDIR=%s\n", p->ident, p->srcdir);
1032		fprintf(outmk, "%s_REALSRCDIR=%s\n", p->ident, p->realsrcdir);
1033
1034		fprintf(outmk, "%s_OBJS=", p->ident);
1035		output_strlst(outmk, p->objs);
1036		if (p->buildopts != NULL) {
1037			fprintf(outmk, "%s_OPTS+=", p->ident);
1038			output_strlst(outmk, p->buildopts);
1039		}
1040#if 0
1041		fprintf(outmk, "$(%s_OBJPATHS): %s_make\n\n", p->ident, p->ident);
1042#endif
1043		fprintf(outmk, "%s_make:\n", p->ident);
1044		fprintf(outmk, "\t(cd $(%s_SRCDIR) && ", p->ident);
1045		if (makeobj)
1046			fprintf(outmk, "$(CRUNCHMAKE) obj && ");
1047		fprintf(outmk, "\\\n");
1048		fprintf(outmk, "\t\t$(CRUNCHMAKE) $(BUILDOPTS) $(%s_OPTS) depend &&",
1049		    p->ident);
1050		fprintf(outmk, "\\\n");
1051		fprintf(outmk, "\t\t$(CRUNCHMAKE) $(BUILDOPTS) $(%s_OPTS) "
1052		    "$(%s_OBJS))",
1053		    p->ident, p->ident);
1054		fprintf(outmk, "\n");
1055		fprintf(outmk, "%s_clean:\n", p->ident);
1056		fprintf(outmk, "\t(cd $(%s_SRCDIR) && $(CRUNCHMAKE) $(BUILDOPTS) clean cleandepend)\n\n",
1057		    p->ident);
1058	} else {
1059		fprintf(outmk, "%s_make:\n", p->ident);
1060		fprintf(outmk, "\t@echo \"** cannot make objs for %s\"\n\n",
1061		    p->name);
1062	}
1063
1064	if (p->libs) {
1065		fprintf(outmk, "%s_LIBS=", p->ident);
1066		output_strlst(outmk, p->libs);
1067	}
1068
1069	fprintf(outmk, "%s_stub.c:\n", p->name);
1070	fprintf(outmk, "\techo \""
1071	    "int _crunched_%s_stub(int argc, char **argv, char **envp)"
1072	    "{return main(argc,argv,envp);}\" >%s_stub.c\n",
1073	    p->ident, p->name);
1074	fprintf(outmk, "%s.lo: %s_stub.o $(%s_OBJPATHS)",
1075	    p->name, p->name, p->ident);
1076	if (p->libs)
1077		fprintf(outmk, " $(%s_LIBS)", p->ident);
1078
1079	fprintf(outmk, "\n");
1080	fprintf(outmk, "\tld -dc -r -o %s.lo %s_stub.o $(%s_OBJPATHS)",
1081	    p->name, p->name, p->ident);
1082	if (p->libs)
1083		fprintf(outmk, " $(%s_LIBS)", p->ident);
1084	fprintf(outmk, "\n");
1085	fprintf(outmk, "\tcrunchide -k _crunched_%s_stub ", p->ident);
1086	for (lst = p->keeplist; lst != NULL; lst = lst->next)
1087		fprintf(outmk, "-k _%s ", lst->str);
1088	fprintf(outmk, "%s.lo\n", p->name);
1089}
1090
1091void output_strlst(FILE *outf, strlst_t *lst)
1092{
1093	for (; lst != NULL; lst = lst->next)
1094		if ( strlen(lst->str) )
1095			fprintf(outf, " %s", lst->str);
1096	fprintf(outf, "\n");
1097}
1098
1099
1100/*
1101 * ========================================================================
1102 * general library routines
1103 *
1104 */
1105
1106void status(char *str)
1107{
1108	static int lastlen = 0;
1109	int len, spaces;
1110
1111	if (!verbose)
1112		return;
1113
1114	len = strlen(str);
1115	spaces = lastlen - len;
1116	if (spaces < 1)
1117		spaces = 1;
1118
1119	fprintf(stderr, " [%s]%*.*s\r", str, spaces, spaces, " ");
1120	fflush(stderr);
1121	lastlen = len;
1122}
1123
1124
1125void out_of_memory(void)
1126{
1127	err(1, "%s: %d: out of memory, stopping", infilename, linenum);
1128}
1129
1130
1131void add_string(strlst_t **listp, char *str)
1132{
1133	strlst_t *p1, *p2;
1134
1135	/* add to end, but be smart about dups */
1136
1137	for (p1 = NULL, p2 = *listp; p2 != NULL; p1 = p2, p2 = p2->next)
1138		if (!strcmp(p2->str, str))
1139			return;
1140
1141	p2 = malloc(sizeof(strlst_t));
1142	if (p2) {
1143		p2->next = NULL;
1144		p2->str = strdup(str);
1145    	}
1146	if (!p2 || !p2->str)
1147		out_of_memory();
1148
1149	if (p1 == NULL)
1150		*listp = p2;
1151	else
1152		p1->next = p2;
1153}
1154
1155int subtract_strlst(strlst_t **lista, strlst_t **listb)
1156{
1157	int subtract_count = 0;
1158	strlst_t *p1;
1159	for (p1 = *listb; p1 != NULL; p1 = p1->next)
1160		if ( in_list(lista, p1->str) ) {
1161			warnx("Will compile library `%s' dynamically", p1->str);
1162			strcat(p1->str, "");
1163			subtract_count++;
1164		}
1165	return subtract_count;
1166}
1167
1168int in_list(strlst_t **listp, char *str)
1169{
1170	strlst_t *p1;
1171	for (p1 = *listp; p1 != NULL; p1 = p1->next)
1172		if (!strcmp(p1->str, str))
1173			return 1;
1174	return 0;
1175}
1176
1177int is_dir(char *pathname)
1178{
1179	struct stat buf;
1180
1181	if (stat(pathname, &buf) == -1)
1182		return 0;
1183
1184	return S_ISDIR(buf.st_mode);
1185}
1186
1187int is_nonempty_file(char *pathname)
1188{
1189	struct stat buf;
1190
1191	if (stat(pathname, &buf) == -1)
1192		return 0;
1193
1194	return S_ISREG(buf.st_mode) && buf.st_size > 0;
1195}
1196