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 1.23 2011/06/24 07:29:04 kevlo 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/types.h>
62 * OUTFILE is the name of the output file. Output is initially written
63 * to the file OUTTEMP, which is then moved to OUTFILE.
66 #define OUTFILE "init.c"
67 #define OUTTEMP "init.c.new"
71 * A text structure is basically just a string that grows as more characters
72 * are added onto the end of it. It is implemented as a linked list of
73 * blocks of characters. The routines addstr and addchar append a string
74 * or a single character, respectively, to a text structure. Writetext
75 * writes the contents of a text structure to a file.
94 * There is one event structure for each event that mkinit handles.
98 const char *name; /* name of event (e.g. INIT) */
99 const char *routine; /* name of routine called on event */
100 const char *comment; /* comment describing routine */
101 struct text code; /* code for handling event */
107 * This file was generated by the mkinit program.\n\
113 * Initialization code.\n\
118 * This routine is called when an error or an interrupt occurs in an\n\
119 * interactive shell and control is returned to the main command loop.\n\
123 struct event event[] = {
124 { "INIT", "init", init, { NULL, 0, NULL, NULL } },
125 { "RESET", "reset", reset, { NULL, 0, NULL, NULL } },
126 { NULL, NULL, NULL, { NULL, 0, NULL, NULL } }
130 const char *curfile; /* current file */
131 int linno; /* current line */
132 const char *header_files[200]; /* list of header files */
133 struct text defines; /* #define statements */
134 struct text decls; /* declarations */
135 int amiddecls; /* for formatting */
138 void readfile(const char *);
139 int match(const char *, const char *);
140 int gooddefine(const char *);
141 void doevent(struct event *, FILE *, const char *);
142 void doinclude(char *);
143 void dodecl(char *, FILE *);
145 void addstr(const char *, struct text *);
146 void addchar(int, struct text *);
147 void writetext(struct text *, FILE *);
148 FILE *ckfopen(const char *, const char *);
149 void *ckmalloc(size_t);
150 char *savestr(const char *);
151 void error(const char *);
153 #define equal(s1, s2) (strcmp(s1, s2) == 0)
156 main(int argc __unused, char *argv[])
160 header_files[0] = savestr("\"shell.h\"");
161 header_files[1] = savestr("\"mystring.h\"");
162 header_files[2] = savestr("\"init.h\"");
163 for (ap = argv + 1 ; *ap ; ap++)
166 rename(OUTTEMP, OUTFILE);
172 * Parse an input file.
176 readfile(const char *fname)
182 fp = ckfopen(fname, "r");
186 while (fgets(line, sizeof line, fp) != NULL) {
188 for (ep = event ; ep->name ; ep++) {
189 if (line[0] == ep->name[0] && match(ep->name, line)) {
190 doevent(ep, fp, fname);
194 if (line[0] == 'I' && match("INCLUDE", line))
196 if (line[0] == 'M' && match("MKINIT", line))
198 if (line[0] == '#' && gooddefine(line)) {
201 static const char undef[] = "#undef ";
204 memcpy(line2, undef, sizeof(undef) - 1);
205 cp = line2 + sizeof(undef) - 1;
206 while(*cp && (*cp == ' ' || *cp == '\t'))
208 while(*cp && *cp != ' ' && *cp != '\t' && *cp != '\n')
210 *cp++ = '\n'; *cp = '\0';
211 addstr(line2, &defines);
212 addstr(line, &defines);
220 match(const char *name, const char *line)
229 if (*q != '{' && *q != ' ' && *q != '\t' && *q != '\n')
236 gooddefine(const char *line)
240 if (! match("#define", line))
241 return 0; /* not a define */
243 while (*p == ' ' || *p == '\t')
245 while (*p != ' ' && *p != '\t') {
247 return 0; /* macro definition */
250 while (*p != '\n' && *p != '\0')
253 return 0; /* multi-line definition */
259 doevent(struct event *ep, FILE *fp, const char *fname)
265 sprintf(line, "\n /* from %s: */\n", fname);
266 addstr(line, &ep->code);
267 addstr(" {\n", &ep->code);
270 if (fgets(line, sizeof line, fp) == NULL)
271 error("Unexpected EOF");
272 if (equal(line, "}\n"))
275 for (p = line ; *p == '\t' ; p++)
277 for ( ; *p == ' ' ; p++)
279 if (*p == '\n' || *p == '#')
281 while (indent >= 8) {
282 addchar('\t', &ep->code);
286 addchar(' ', &ep->code);
289 addstr(p, &ep->code);
291 addstr(" }\n", &ep->code);
296 doinclude(char *line)
302 for (p = line ; *p != '"' && *p != '<' && *p != '\0' ; p++);
304 error("Expecting '\"' or '<'");
306 while (*p != ' ' && *p != '\t' && *p != '\n')
308 if (p[-1] != '"' && p[-1] != '>')
309 error("Missing terminator");
312 /* name now contains the name of the include file */
313 for (pp = header_files ; *pp && ! equal(*pp, name) ; pp++);
320 dodecl(char *line1, FILE *fp)
325 if (strcmp(line1, "MKINIT\n") == 0) { /* start of struct/union decl */
326 addchar('\n', &decls);
329 if (fgets(line, sizeof line, fp) == NULL)
330 error("Unterminated structure declaration");
331 addstr(line, &decls);
332 } while (line[0] != '}');
336 addchar('\n', &decls);
338 for (p = line1 + 6 ; *p && strchr("=/\n", *p) == NULL; p++)
340 if (*p == '=') { /* eliminate initialization */
341 for (q = p ; *q && *q != ';' ; q++);
350 addstr("extern", &decls);
351 addstr(line1 + 6, &decls);
361 * Write the output to the file OUTTEMP.
368 const char * const *pp;
371 fp = ckfopen(OUTTEMP, "w");
373 for (pp = header_files ; *pp ; pp++)
374 fprintf(fp, "#include %s\n", *pp);
376 writetext(&defines, fp);
378 writetext(&decls, fp);
379 for (ep = event ; ep->name ; ep++) {
381 fputs(ep->comment, fp);
382 fprintf(fp, "\nvoid\n%s(void)\n{\n", ep->routine);
383 writetext(&ep->code, fp);
391 * A text structure is simply a block of text that is kept in memory.
392 * Addstr appends a string to the text struct, and addchar appends a single
397 addstr(const char *s, struct text *text)
400 if (--text->nleft < 0)
403 *text->nextc++ = *s++;
409 addchar(int c, struct text *text)
413 if (--text->nleft < 0) {
414 bp = ckmalloc(sizeof *bp);
415 if (text->start == NULL)
418 text->last->next = bp;
420 text->nextc = bp->text;
421 text->nleft = BLOCKSIZE - 1;
427 * Write the contents of a text structure to a file.
430 writetext(struct text *text, FILE *fp)
434 if (text->start != NULL) {
435 for (bp = text->start ; bp != text->last ; bp = bp->next)
436 fwrite(bp->text, sizeof (char), BLOCKSIZE, fp);
437 fwrite(bp->text, sizeof (char), BLOCKSIZE - text->nleft, fp);
442 ckfopen(const char *file, const char *mode)
446 if ((fp = fopen(file, mode)) == NULL) {
447 fprintf(stderr, "Can't open %s: %s\n", file, strerror(errno));
454 ckmalloc(size_t nbytes)
458 if ((p = malloc(nbytes)) == NULL)
459 error("Out of space");
464 savestr(const char *s)
468 p = ckmalloc(strlen(s) + 1);
474 error(const char *msg)
477 fprintf(stderr, "%s:%d: ", curfile, linno);
478 fprintf(stderr, "%s\n", msg);