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 1.14.2.1 2002/07/19 04:38:51 tjr Exp $
39 * $DragonFly: src/bin/sh/mkinit.c,v 1.4 2005/04/19 05:18:19 cpressey Exp $
43 * This program scans all the source files for code to handle various
44 * special events and combines this code into one file. This (allegedly)
45 * improves the structure of the program since there is no need for
46 * anyone outside of a module to know that that module performs special
47 * operations on particular events.
49 * Usage: mkinit sourcefile...
53 #include <sys/cdefs.h>
54 #include <sys/types.h>
64 * OUTFILE is the name of the output file. Output is initially written
65 * to the file OUTTEMP, which is then moved to OUTFILE.
68 #define OUTFILE "init.c"
69 #define OUTTEMP "init.c.new"
73 * A text structure is basicly just a string that grows as more characters
74 * are added onto the end of it. It is implemented as a linked list of
75 * blocks of characters. The routines addstr and addchar append a string
76 * or a single character, respectively, to a text structure. Writetext
77 * writes the contents of a text structure to a file.
96 * There is one event structure for each event that mkinit handles.
100 const char *name; /* name of event (e.g. INIT) */
101 const char *routine; /* name of routine called on event */
102 const char *comment; /* comment describing routine */
103 struct text code; /* code for handling event */
109 * This file was generated by the mkinit program.\n\
115 * Initialization code.\n\
120 * This routine is called when an error or an interrupt occurs in an\n\
121 * interactive shell and control is returned to the main command loop.\n\
124 char shellproc[] = "\
126 * This routine is called to initialize the shell to run a shell procedure.\n\
130 struct event event[] = {
131 {"INIT", "init", init, {NULL, 0, NULL, NULL}},
132 {"RESET", "reset", reset, {NULL, 0, NULL, NULL}},
133 {"SHELLPROC", "initshellproc", shellproc, {NULL, 0, NULL, NULL}},
134 {NULL, NULL, NULL, {NULL, 0, NULL, NULL}}
138 const char *curfile; /* current file */
139 int linno; /* current line */
140 const char *header_files[200]; /* list of header files */
141 struct text defines; /* #define statements */
142 struct text decls; /* declarations */
143 int amiddecls; /* for formatting */
146 void readfile(const char *);
147 int match(const char *, const char *);
148 int gooddefine(const char *);
149 void doevent(struct event *, FILE *, const char *);
150 void doinclude(char *);
151 void dodecl(char *, FILE *);
153 void addstr(const char *, struct text *);
154 void addchar(int, struct text *);
155 void writetext(struct text *, FILE *);
156 FILE *ckfopen(const char *, const char *);
158 char *savestr(const char *);
159 void error(const char *);
161 #define equal(s1, s2) (strcmp(s1, s2) == 0)
164 main(int argc __unused, char *argv[])
168 header_files[0] = "\"shell.h\"";
169 header_files[1] = "\"mystring.h\"";
170 header_files[2] = "\"init.h\"";
171 for (ap = argv + 1 ; *ap ; ap++)
174 rename(OUTTEMP, OUTFILE);
180 * Parse an input file.
184 readfile(const char *fname)
190 fp = ckfopen(fname, "r");
194 while (fgets(line, sizeof line, fp) != NULL) {
196 for (ep = event ; ep->name ; ep++) {
197 if (line[0] == ep->name[0] && match(ep->name, line)) {
198 doevent(ep, fp, fname);
202 if (line[0] == 'I' && match("INCLUDE", line))
204 if (line[0] == 'M' && match("MKINIT", line))
206 if (line[0] == '#' && gooddefine(line)) {
209 static const char undef[] = "#undef ";
212 memcpy(line2, undef, sizeof(undef) - 1);
213 cp = line2 + sizeof(undef) - 1;
214 while(*cp && (*cp == ' ' || *cp == '\t'))
216 while(*cp && *cp != ' ' && *cp != '\t' && *cp != '\n')
218 *cp++ = '\n'; *cp = '\0';
219 addstr(line2, &defines);
220 addstr(line, &defines);
228 match(const char *name, const char *line)
237 if (*q != '{' && *q != ' ' && *q != '\t' && *q != '\n')
244 gooddefine(const char *line)
248 if (! match("#define", line))
249 return 0; /* not a define */
251 while (*p == ' ' || *p == '\t')
253 while (*p != ' ' && *p != '\t') {
255 return 0; /* macro definition */
258 while (*p != '\n' && *p != '\0')
261 return 0; /* multi-line definition */
267 doevent(struct event *ep, FILE *fp, const char *fname)
273 sprintf(line, "\n /* from %s: */\n", fname);
274 addstr(line, &ep->code);
275 addstr(" {\n", &ep->code);
278 if (fgets(line, sizeof line, fp) == NULL)
279 error("Unexpected EOF");
280 if (equal(line, "}\n"))
283 for (p = line ; *p == '\t' ; p++)
285 for ( ; *p == ' ' ; p++)
287 if (*p == '\n' || *p == '#')
289 while (indent >= 8) {
290 addchar('\t', &ep->code);
294 addchar(' ', &ep->code);
297 addstr(p, &ep->code);
299 addstr(" }\n", &ep->code);
304 doinclude(char *line)
310 for (p = line ; *p != '"' && *p != '<' && *p != '\0' ; p++);
312 error("Expecting '\"' or '<'");
314 while (*p != ' ' && *p != '\t' && *p != '\n')
316 if (p[-1] != '"' && p[-1] != '>')
317 error("Missing terminator");
320 /* name now contains the name of the include file */
321 for (pp = header_files ; *pp && ! equal(*pp, name) ; pp++);
328 dodecl(char *line1, FILE *fp)
333 if (strcmp(line1, "MKINIT\n") == 0) { /* start of struct/union decl */
334 addchar('\n', &decls);
337 if (fgets(line, sizeof line, fp) == NULL)
338 error("Unterminated structure declaration");
339 addstr(line, &decls);
340 } while (line[0] != '}');
344 addchar('\n', &decls);
346 for (p = line1 + 6 ; *p && strchr("=/\n", *p) == NULL; p++)
348 if (*p == '=') { /* eliminate initialization */
349 for (q = p ; *q && *q != ';' ; q++);
358 addstr("extern", &decls);
359 addstr(line1 + 6, &decls);
369 * Write the output to the file OUTTEMP.
376 const char * const *pp;
379 fp = ckfopen(OUTTEMP, "w");
381 for (pp = header_files ; *pp ; pp++)
382 fprintf(fp, "#include %s\n", *pp);
384 writetext(&defines, fp);
386 writetext(&decls, fp);
387 for (ep = event ; ep->name ; ep++) {
389 fputs(ep->comment, fp);
390 fprintf(fp, "\nvoid\n%s(void) {\n", ep->routine);
391 writetext(&ep->code, fp);
399 * A text structure is simply a block of text that is kept in memory.
400 * Addstr appends a string to the text struct, and addchar appends a single
405 addstr(const char *s, struct text *text)
408 if (--text->nleft < 0)
411 *text->nextc++ = *s++;
417 addchar(int c, struct text *text)
421 if (--text->nleft < 0) {
422 bp = ckmalloc(sizeof *bp);
423 if (text->start == NULL)
426 text->last->next = bp;
428 text->nextc = bp->text;
429 text->nleft = BLOCKSIZE - 1;
435 * Write the contents of a text structure to a file.
438 writetext(struct text *text, FILE *fp)
442 if (text->start != NULL) {
443 for (bp = text->start ; bp != text->last ; bp = bp->next)
444 fwrite(bp->text, sizeof (char), BLOCKSIZE, fp);
445 fwrite(bp->text, sizeof (char), BLOCKSIZE - text->nleft, fp);
450 ckfopen(const char *file, const char *mode)
454 if ((fp = fopen(file, mode)) == NULL) {
455 fprintf(stderr, "Can't open %s: %s\n", file, strerror(errno));
466 if ((p = malloc(nbytes)) == NULL)
467 error("Out of space");
472 savestr(const char *s)
476 p = ckmalloc(strlen(s) + 1);
482 error(const char *msg)
485 fprintf(stderr, "%s:%d: ", curfile, linno);
486 fprintf(stderr, "%s\n", msg);