2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#) Copyright (c) 1991, 1993 The Regents of the University of California. All rights reserved.
37 * @(#)mkinit.c 8.2 (Berkeley) 5/4/95
38 * $FreeBSD: src/bin/sh/mkinit.c,v 1.21 2011/02/04 22:47:55 jilles Exp $
42 * This program scans all the source files for code to handle various
43 * special events and combines this code into one file. This (allegedly)
44 * improves the structure of the program since there is no need for
45 * anyone outside of a module to know that that module performs special
46 * operations on particular events.
48 * Usage: mkinit sourcefile...
52 #include <sys/cdefs.h>
53 #include <sys/types.h>
63 * OUTFILE is the name of the output file. Output is initially written
64 * to the file OUTTEMP, which is then moved to OUTFILE.
67 #define OUTFILE "init.c"
68 #define OUTTEMP "init.c.new"
72 * A text structure is basicly just a string that grows as more characters
73 * are added onto the end of it. It is implemented as a linked list of
74 * blocks of characters. The routines addstr and addchar append a string
75 * or a single character, respectively, to a text structure. Writetext
76 * writes the contents of a text structure to a file.
95 * There is one event structure for each event that mkinit handles.
99 const char *name; /* name of event (e.g. INIT) */
100 const char *routine; /* name of routine called on event */
101 const char *comment; /* comment describing routine */
102 struct text code; /* code for handling event */
108 * This file was generated by the mkinit program.\n\
114 * Initialization code.\n\
119 * This routine is called when an error or an interrupt occurs in an\n\
120 * interactive shell and control is returned to the main command loop.\n\
124 struct event event[] = {
125 { "INIT", "init", init, { NULL, 0, NULL, NULL } },
126 { "RESET", "reset", reset, { NULL, 0, NULL, NULL } },
127 { NULL, NULL, NULL, { NULL, 0, NULL, NULL } }
131 const char *curfile; /* current file */
132 int linno; /* current line */
133 const char *header_files[200]; /* list of header files */
134 struct text defines; /* #define statements */
135 struct text decls; /* declarations */
136 int amiddecls; /* for formatting */
139 void readfile(const char *);
140 int match(const char *, const char *);
141 int gooddefine(const char *);
142 void doevent(struct event *, FILE *, const char *);
143 void doinclude(char *);
144 void dodecl(char *, FILE *);
146 void addstr(const char *, struct text *);
147 void addchar(int, struct text *);
148 void writetext(struct text *, FILE *);
149 FILE *ckfopen(const char *, const char *);
150 void *ckmalloc(size_t);
151 char *savestr(const char *);
152 void error(const char *);
154 #define equal(s1, s2) (strcmp(s1, s2) == 0)
157 main(int argc __unused, char *argv[])
161 header_files[0] = savestr("\"shell.h\"");
162 header_files[1] = savestr("\"mystring.h\"");
163 header_files[2] = savestr("\"init.h\"");
164 for (ap = argv + 1 ; *ap ; ap++)
167 rename(OUTTEMP, OUTFILE);
173 * Parse an input file.
177 readfile(const char *fname)
183 fp = ckfopen(fname, "r");
187 while (fgets(line, sizeof line, fp) != NULL) {
189 for (ep = event ; ep->name ; ep++) {
190 if (line[0] == ep->name[0] && match(ep->name, line)) {
191 doevent(ep, fp, fname);
195 if (line[0] == 'I' && match("INCLUDE", line))
197 if (line[0] == 'M' && match("MKINIT", line))
199 if (line[0] == '#' && gooddefine(line)) {
202 static const char undef[] = "#undef ";
205 memcpy(line2, undef, sizeof(undef) - 1);
206 cp = line2 + sizeof(undef) - 1;
207 while(*cp && (*cp == ' ' || *cp == '\t'))
209 while(*cp && *cp != ' ' && *cp != '\t' && *cp != '\n')
211 *cp++ = '\n'; *cp = '\0';
212 addstr(line2, &defines);
213 addstr(line, &defines);
221 match(const char *name, const char *line)
230 if (*q != '{' && *q != ' ' && *q != '\t' && *q != '\n')
237 gooddefine(const char *line)
241 if (! match("#define", line))
242 return 0; /* not a define */
244 while (*p == ' ' || *p == '\t')
246 while (*p != ' ' && *p != '\t') {
248 return 0; /* macro definition */
251 while (*p != '\n' && *p != '\0')
254 return 0; /* multi-line definition */
260 doevent(struct event *ep, FILE *fp, const char *fname)
266 sprintf(line, "\n /* from %s: */\n", fname);
267 addstr(line, &ep->code);
268 addstr(" {\n", &ep->code);
271 if (fgets(line, sizeof line, fp) == NULL)
272 error("Unexpected EOF");
273 if (equal(line, "}\n"))
276 for (p = line ; *p == '\t' ; p++)
278 for ( ; *p == ' ' ; p++)
280 if (*p == '\n' || *p == '#')
282 while (indent >= 8) {
283 addchar('\t', &ep->code);
287 addchar(' ', &ep->code);
290 addstr(p, &ep->code);
292 addstr(" }\n", &ep->code);
297 doinclude(char *line)
303 for (p = line ; *p != '"' && *p != '<' && *p != '\0' ; p++);
305 error("Expecting '\"' or '<'");
307 while (*p != ' ' && *p != '\t' && *p != '\n')
309 if (p[-1] != '"' && p[-1] != '>')
310 error("Missing terminator");
313 /* name now contains the name of the include file */
314 for (pp = header_files ; *pp && ! equal(*pp, name) ; pp++);
321 dodecl(char *line1, FILE *fp)
326 if (strcmp(line1, "MKINIT\n") == 0) { /* start of struct/union decl */
327 addchar('\n', &decls);
330 if (fgets(line, sizeof line, fp) == NULL)
331 error("Unterminated structure declaration");
332 addstr(line, &decls);
333 } while (line[0] != '}');
337 addchar('\n', &decls);
339 for (p = line1 + 6 ; *p && strchr("=/\n", *p) == NULL; p++)
341 if (*p == '=') { /* eliminate initialization */
342 for (q = p ; *q && *q != ';' ; q++);
351 addstr("extern", &decls);
352 addstr(line1 + 6, &decls);
362 * Write the output to the file OUTTEMP.
369 const char * const *pp;
372 fp = ckfopen(OUTTEMP, "w");
374 for (pp = header_files ; *pp ; pp++)
375 fprintf(fp, "#include %s\n", *pp);
377 writetext(&defines, fp);
379 writetext(&decls, fp);
380 for (ep = event ; ep->name ; ep++) {
382 fputs(ep->comment, fp);
383 fprintf(fp, "\nvoid\n%s(void)\n{\n", ep->routine);
384 writetext(&ep->code, fp);
392 * A text structure is simply a block of text that is kept in memory.
393 * Addstr appends a string to the text struct, and addchar appends a single
398 addstr(const char *s, struct text *text)
401 if (--text->nleft < 0)
404 *text->nextc++ = *s++;
410 addchar(int c, struct text *text)
414 if (--text->nleft < 0) {
415 bp = ckmalloc(sizeof *bp);
416 if (text->start == NULL)
419 text->last->next = bp;
421 text->nextc = bp->text;
422 text->nleft = BLOCKSIZE - 1;
428 * Write the contents of a text structure to a file.
431 writetext(struct text *text, FILE *fp)
435 if (text->start != NULL) {
436 for (bp = text->start ; bp != text->last ; bp = bp->next)
437 fwrite(bp->text, sizeof (char), BLOCKSIZE, fp);
438 fwrite(bp->text, sizeof (char), BLOCKSIZE - text->nleft, fp);
443 ckfopen(const char *file, const char *mode)
447 if ((fp = fopen(file, mode)) == NULL) {
448 fprintf(stderr, "Can't open %s: %s\n", file, strerror(errno));
455 ckmalloc(size_t nbytes)
459 if ((p = malloc(nbytes)) == NULL)
460 error("Out of space");
465 savestr(const char *s)
469 p = ckmalloc(strlen(s) + 1);
475 error(const char *msg)
478 fprintf(stderr, "%s:%d: ", curfile, linno);
479 fprintf(stderr, "%s\n", msg);