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
38 static char const copyright[] =
39 "@(#) Copyright (c) 1991, 1993\n\
40 The Regents of the University of California. All rights reserved.\n";
45 static char sccsid[] = "@(#)mkinit.c 8.2 (Berkeley) 5/4/95";
48 #include <sys/cdefs.h>
49 __FBSDID("$FreeBSD: src/bin/sh/mkinit.c,v 1.14.2.1 2002/07/19 04:38:51 tjr Exp $");
52 * This program scans all the source files for code to handle various
53 * special events and combines this code into one file. This (allegedly)
54 * improves the structure of the program since there is no need for
55 * anyone outside of a module to know that that module performs special
56 * operations on particular events.
58 * Usage: mkinit sourcefile...
62 #include <sys/cdefs.h>
63 #include <sys/types.h>
73 * OUTFILE is the name of the output file. Output is initially written
74 * to the file OUTTEMP, which is then moved to OUTFILE.
77 #define OUTFILE "init.c"
78 #define OUTTEMP "init.c.new"
82 * A text structure is basicly just a string that grows as more characters
83 * are added onto the end of it. It is implemented as a linked list of
84 * blocks of characters. The routines addstr and addchar append a string
85 * or a single character, respectively, to a text structure. Writetext
86 * writes the contents of a text structure to a file.
100 char text[BLOCKSIZE];
105 * There is one event structure for each event that mkinit handles.
109 char *name; /* name of event (e.g. INIT) */
110 char *routine; /* name of routine called on event */
111 char *comment; /* comment describing routine */
112 struct text code; /* code for handling event */
118 * This file was generated by the mkinit program.\n\
124 * Initialization code.\n\
129 * This routine is called when an error or an interrupt occurs in an\n\
130 * interactive shell and control is returned to the main command loop.\n\
133 char shellproc[] = "\
135 * This routine is called to initialize the shell to run a shell procedure.\n\
139 struct event event[] = {
140 {"INIT", "init", init},
141 {"RESET", "reset", reset},
142 {"SHELLPROC", "initshellproc", shellproc},
147 char *curfile; /* current file */
148 int linno; /* current line */
149 char *header_files[200]; /* list of header files */
150 struct text defines; /* #define statements */
151 struct text decls; /* declarations */
152 int amiddecls; /* for formatting */
155 void readfile(char *);
156 int match(char *, char *);
157 int gooddefine(char *);
158 void doevent(struct event *, FILE *, char *);
159 void doinclude(char *);
160 void dodecl(char *, FILE *);
162 void addstr(char *, struct text *);
163 void addchar(int, struct text *);
164 void writetext(struct text *, FILE *);
165 FILE *ckfopen(char *, char *);
167 char *savestr(char *);
170 #define equal(s1, s2) (strcmp(s1, s2) == 0)
173 main(int argc __unused, char *argv[])
177 header_files[0] = "\"shell.h\"";
178 header_files[1] = "\"mystring.h\"";
179 for (ap = argv + 1 ; *ap ; ap++)
182 rename(OUTTEMP, OUTFILE);
188 * Parse an input file.
192 readfile(char *fname)
198 fp = ckfopen(fname, "r");
202 while (fgets(line, sizeof line, fp) != NULL) {
204 for (ep = event ; ep->name ; ep++) {
205 if (line[0] == ep->name[0] && match(ep->name, line)) {
206 doevent(ep, fp, fname);
210 if (line[0] == 'I' && match("INCLUDE", line))
212 if (line[0] == 'M' && match("MKINIT", line))
214 if (line[0] == '#' && gooddefine(line)) {
217 static const char undef[] = "#undef ";
220 memcpy(line2, undef, sizeof(undef) - 1);
221 cp = line2 + sizeof(undef) - 1;
222 while(*cp && (*cp == ' ' || *cp == '\t'))
224 while(*cp && *cp != ' ' && *cp != '\t' && *cp != '\n')
226 *cp++ = '\n'; *cp = '\0';
227 addstr(line2, &defines);
228 addstr(line, &defines);
236 match(char *name, char *line)
245 if (*q != '{' && *q != ' ' && *q != '\t' && *q != '\n')
252 gooddefine(char *line)
256 if (! match("#define", line))
257 return 0; /* not a define */
259 while (*p == ' ' || *p == '\t')
261 while (*p != ' ' && *p != '\t') {
263 return 0; /* macro definition */
266 while (*p != '\n' && *p != '\0')
269 return 0; /* multi-line definition */
275 doevent(struct event *ep, FILE *fp, char *fname)
281 sprintf(line, "\n /* from %s: */\n", fname);
282 addstr(line, &ep->code);
283 addstr(" {\n", &ep->code);
286 if (fgets(line, sizeof line, fp) == NULL)
287 error("Unexpected EOF");
288 if (equal(line, "}\n"))
291 for (p = line ; *p == '\t' ; p++)
293 for ( ; *p == ' ' ; p++)
295 if (*p == '\n' || *p == '#')
297 while (indent >= 8) {
298 addchar('\t', &ep->code);
302 addchar(' ', &ep->code);
305 addstr(p, &ep->code);
307 addstr(" }\n", &ep->code);
312 doinclude(char *line)
318 for (p = line ; *p != '"' && *p != '<' && *p != '\0' ; p++);
320 error("Expecting '\"' or '<'");
322 while (*p != ' ' && *p != '\t' && *p != '\n')
324 if (p[-1] != '"' && p[-1] != '>')
325 error("Missing terminator");
328 /* name now contains the name of the include file */
329 for (pp = header_files ; *pp && ! equal(*pp, name) ; pp++);
336 dodecl(char *line1, FILE *fp)
341 if (strcmp(line1, "MKINIT\n") == 0) { /* start of struct/union decl */
342 addchar('\n', &decls);
345 if (fgets(line, sizeof line, fp) == NULL)
346 error("Unterminated structure declaration");
347 addstr(line, &decls);
348 } while (line[0] != '}');
352 addchar('\n', &decls);
354 for (p = line1 + 6 ; *p && strchr("=/\n", *p) == NULL; p++)
356 if (*p == '=') { /* eliminate initialization */
357 for (q = p ; *q && *q != ';' ; q++);
366 addstr("extern", &decls);
367 addstr(line1 + 6, &decls);
377 * Write the output to the file OUTTEMP.
387 fp = ckfopen(OUTTEMP, "w");
389 for (pp = header_files ; *pp ; pp++)
390 fprintf(fp, "#include %s\n", *pp);
392 writetext(&defines, fp);
394 writetext(&decls, fp);
395 for (ep = event ; ep->name ; ep++) {
397 fputs(ep->comment, fp);
398 fprintf(fp, "\nvoid\n%s() {\n", ep->routine);
399 writetext(&ep->code, fp);
407 * A text structure is simply a block of text that is kept in memory.
408 * Addstr appends a string to the text struct, and addchar appends a single
413 addstr(char *s, struct text *text)
416 if (--text->nleft < 0)
419 *text->nextc++ = *s++;
425 addchar(int c, struct text *text)
429 if (--text->nleft < 0) {
430 bp = ckmalloc(sizeof *bp);
431 if (text->start == NULL)
434 text->last->next = bp;
436 text->nextc = bp->text;
437 text->nleft = BLOCKSIZE - 1;
443 * Write the contents of a text structure to a file.
446 writetext(struct text *text, FILE *fp)
450 if (text->start != NULL) {
451 for (bp = text->start ; bp != text->last ; bp = bp->next)
452 fwrite(bp->text, sizeof (char), BLOCKSIZE, fp);
453 fwrite(bp->text, sizeof (char), BLOCKSIZE - text->nleft, fp);
458 ckfopen(char *file, char *mode)
462 if ((fp = fopen(file, mode)) == NULL) {
463 fprintf(stderr, "Can't open %s: %s\n", file, strerror(errno));
474 if ((p = malloc(nbytes)) == NULL)
475 error("Out of space");
484 p = ckmalloc(strlen(s) + 1);
493 fprintf(stderr, "%s:%d: ", curfile, linno);
494 fprintf(stderr, "%s\n", msg);