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- /*-
- * Copyright (c) 1991 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1991 The Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)mkinit.c 5.3 (Berkeley) 3/13/91";
- #endif /* not lint */
-
- /*
- * This program scans all the source files for code to handle various
- * special events and combines this code into one file. This (allegedly)
- * improves the structure of the program since there is no need for
- * anyone outside of a module to know that that module performs special
- * operations on particular events. The command is executed iff init.c
- * is actually changed.
- *
- * Usage: mkinit command sourcefile...
- */
-
-
- #include <sys/cdefs.h>
- #include <stdio.h>
- #include <fcntl.h>
-
-
- /*
- * OUTFILE is the name of the output file. Output is initially written
- * to the file OUTTEMP, which is then moved to OUTFILE if OUTTEMP and
- * OUTFILE are different.
- */
-
- #define OUTFILE "init.c"
- #define OUTTEMP "init.c.new"
- #define OUTOBJ "init.o"
-
-
- /*
- * A text structure is basicly just a string that grows as more characters
- * are added onto the end of it. It is implemented as a linked list of
- * blocks of characters. The routines addstr and addchar append a string
- * or a single character, respectively, to a text structure. Writetext
- * writes the contents of a text structure to a file.
- */
-
- #define BLOCKSIZE 512
-
- struct text {
- char *nextc;
- int nleft;
- struct block *start;
- struct block *last;
- };
-
- struct block {
- struct block *next;
- char text[BLOCKSIZE];
- };
-
-
- /*
- * There is one event structure for each event that mkinit handles.
- */
-
- struct event {
- char *name; /* name of event (e.g. INIT) */
- char *routine; /* name of routine called on event */
- char *comment; /* comment describing routine */
- struct text code; /* code for handling event */
- };
-
-
- char writer[] = "\
- /*\n\
- * This file was generated by the mkinit program.\n\
- */\n\
- \n";
-
- char init[] = "\
- /*\n\
- * Initialization code.\n\
- */\n";
-
- char reset[] = "\
- /*\n\
- * This routine is called when an error or an interrupt occurs in an\n\
- * interactive shell and control is returned to the main command loop.\n\
- */\n";
-
- char shellproc[] = "\
- /*\n\
- * This routine is called to initialize the shell to run a shell procedure.\n\
- */\n";
-
-
- struct event event[] = {
- {"INIT", "init", init},
- {"RESET", "reset", reset},
- {"SHELLPROC", "initshellproc", shellproc},
- {NULL, NULL}
- };
-
-
- char *curfile; /* current file */
- int linno; /* current line */
- char *header_files[200]; /* list of header files */
- struct text defines; /* #define statements */
- struct text decls; /* declarations */
- int amiddecls; /* for formatting */
-
-
- void readfile(), doevent(), doinclude(), dodecl(), output();
- void addstr(), addchar(), writetext();
-
- #define equal(s1, s2) (strcmp(s1, s2) == 0)
-
- FILE *ckfopen();
- char *savestr();
- void *ckmalloc __P((int));
- void error();
-
- main(argc, argv)
- char **argv;
- {
- char **ap;
- int fd;
- char c;
-
- if (argc < 2)
- error("Usage: mkinit command file...");
- header_files[0] = "\"shell.h\"";
- header_files[1] = "\"mystring.h\"";
- for (ap = argv + 2 ; *ap ; ap++)
- readfile(*ap);
- output();
- if (file_changed()) {
- unlink(OUTFILE);
- link(OUTTEMP, OUTFILE);
- unlink(OUTTEMP);
- } else {
- unlink(OUTTEMP);
- if (touch(OUTOBJ))
- exit(0); /* no compilation necessary */
- }
- printf("%s\n", argv[1]);
- execl("/bin/sh", "sh", "-c", argv[1], (char *)0);
- error("Can't exec shell");
- }
-
-
- /*
- * Parse an input file.
- */
-
- void
- readfile(fname)
- char *fname;
- {
- FILE *fp;
- char line[1024];
- struct event *ep;
-
- fp = ckfopen(fname, "r");
- curfile = fname;
- linno = 0;
- amiddecls = 0;
- while (fgets(line, sizeof line, fp) != NULL) {
- linno++;
- for (ep = event ; ep->name ; ep++) {
- if (line[0] == ep->name[0] && match(ep->name, line)) {
- doevent(ep, fp, fname);
- break;
- }
- }
- if (line[0] == 'I' && match("INCLUDE", line))
- doinclude(line);
- if (line[0] == 'M' && match("MKINIT", line))
- dodecl(line, fp);
- if (line[0] == '#' && gooddefine(line))
- addstr(line, &defines);
- }
- fclose(fp);
- }
-
-
- int
- match(name, line)
- char *name;
- char *line;
- {
- register char *p, *q;
-
- p = name, q = line;
- while (*p) {
- if (*p++ != *q++)
- return 0;
- }
- if (*q != '{' && *q != ' ' && *q != '\t' && *q != '\n')
- return 0;
- return 1;
- }
-
-
- int
- gooddefine(line)
- char *line;
- {
- register char *p;
-
- if (! match("#define", line))
- return 0; /* not a define */
- p = line + 7;
- while (*p == ' ' || *p == '\t')
- p++;
- while (*p != ' ' && *p != '\t') {
- if (*p == '(')
- return 0; /* macro definition */
- p++;
- }
- while (*p != '\n' && *p != '\0')
- p++;
- if (p[-1] == '\\')
- return 0; /* multi-line definition */
- return 1;
- }
-
-
- void
- doevent(ep, fp, fname)
- register struct event *ep;
- FILE *fp;
- char *fname;
- {
- char line[1024];
- int indent;
- char *p;
-
- sprintf(line, "\n /* from %s: */\n", fname);
- addstr(line, &ep->code);
- addstr(" {\n", &ep->code);
- for (;;) {
- linno++;
- if (fgets(line, sizeof line, fp) == NULL)
- error("Unexpected EOF");
- if (equal(line, "}\n"))
- break;
- indent = 6;
- for (p = line ; *p == '\t' ; p++)
- indent += 8;
- for ( ; *p == ' ' ; p++)
- indent++;
- if (*p == '\n' || *p == '#')
- indent = 0;
- while (indent >= 8) {
- addchar('\t', &ep->code);
- indent -= 8;
- }
- while (indent > 0) {
- addchar(' ', &ep->code);
- indent--;
- }
- addstr(p, &ep->code);
- }
- addstr(" }\n", &ep->code);
- }
-
-
- void
- doinclude(line)
- char *line;
- {
- register char *p;
- char *name;
- register char **pp;
-
- for (p = line ; *p != '"' && *p != '<' && *p != '\0' ; p++);
- if (*p == '\0')
- error("Expecting '\"' or '<'");
- name = p;
- while (*p != ' ' && *p != '\t' && *p != '\n')
- p++;
- if (p[-1] != '"' && p[-1] != '>')
- error("Missing terminator");
- *p = '\0';
-
- /* name now contains the name of the include file */
- for (pp = header_files ; *pp && ! equal(*pp, name) ; pp++);
- if (*pp == NULL)
- *pp = savestr(name);
- }
-
-
- void
- dodecl(line1, fp)
- char *line1;
- FILE *fp;
- {
- char line[1024];
- register char *p, *q;
-
- if (strcmp(line1, "MKINIT\n") == 0) { /* start of struct/union decl */
- addchar('\n', &decls);
- do {
- linno++;
- if (fgets(line, sizeof line, fp) == NULL)
- error("Unterminated structure declaration");
- addstr(line, &decls);
- } while (line[0] != '}');
- amiddecls = 0;
- } else {
- if (! amiddecls)
- addchar('\n', &decls);
- q = NULL;
- for (p = line1 + 6 ; *p != '=' && *p != '/' ; p++);
- if (*p == '=') { /* eliminate initialization */
- for (q = p ; *q && *q != ';' ; q++);
- if (*q == '\0')
- q = NULL;
- else {
- while (p[-1] == ' ')
- p--;
- *p = '\0';
- }
- }
- addstr("extern", &decls);
- addstr(line1 + 6, &decls);
- if (q != NULL)
- addstr(q, &decls);
- amiddecls = 1;
- }
- }
-
-
-
- /*
- * Write the output to the file OUTTEMP.
- */
-
- void
- output() {
- FILE *fp;
- char **pp;
- struct event *ep;
-
- fp = ckfopen(OUTTEMP, "w");
- fputs(writer, fp);
- for (pp = header_files ; *pp ; pp++)
- fprintf(fp, "#include %s\n", *pp);
- fputs("\n\n\n", fp);
- writetext(&defines, fp);
- fputs("\n\n", fp);
- writetext(&decls, fp);
- for (ep = event ; ep->name ; ep++) {
- fputs("\n\n\n", fp);
- fputs(ep->comment, fp);
- fprintf(fp, "\nvoid\n%s() {\n", ep->routine);
- writetext(&ep->code, fp);
- fprintf(fp, "}\n");
- }
- fclose(fp);
- }
-
-
- /*
- * Return true if the new output file is different from the old one.
- */
-
- int
- file_changed() {
- register FILE *f1, *f2;
- register int c;
-
- if ((f1 = fopen(OUTFILE, "r")) == NULL
- || (f2 = fopen(OUTTEMP, "r")) == NULL)
- return 1;
- while ((c = getc(f1)) == getc(f2)) {
- if (c == EOF)
- return 0;
- }
- return 1;
- }
-
-
- /*
- * Touch a file. Returns 0 on failure, 1 on success.
- */
-
- int
- touch(file)
- char *file;
- {
- int fd;
- char c;
-
- if ((fd = open(file, O_RDWR)) < 0)
- return 0;
- if (read(fd, &c, 1) != 1) {
- close(fd);
- return 0;
- }
- lseek(fd, 0L, 0);
- write(fd, &c, 1);
- close(fd);
- return 1;
- }
-
-
-
- /*
- * A text structure is simply a block of text that is kept in memory.
- * Addstr appends a string to the text struct, and addchar appends a single
- * character.
- */
-
- void
- addstr(s, text)
- register char *s;
- register struct text *text;
- {
- while (*s) {
- if (--text->nleft < 0)
- addchar(*s++, text);
- else
- *text->nextc++ = *s++;
- }
- }
-
-
- void
- addchar(c, text)
- register struct text *text;
- {
- struct block *bp;
-
- if (--text->nleft < 0) {
- bp = ckmalloc(sizeof *bp);
- if (text->start == NULL)
- text->start = bp;
- else
- text->last->next = bp;
- text->last = bp;
- text->nextc = bp->text;
- text->nleft = BLOCKSIZE - 1;
- }
- *text->nextc++ = c;
- }
-
- /*
- * Write the contents of a text structure to a file.
- */
- void
- writetext(text, fp)
- struct text *text;
- FILE *fp;
- {
- struct block *bp;
-
- if (text->start != NULL) {
- for (bp = text->start ; bp != text->last ; bp = bp->next)
- fwrite(bp->text, sizeof (char), BLOCKSIZE, fp);
- fwrite(bp->text, sizeof (char), BLOCKSIZE - text->nleft, fp);
- }
- }
-
- FILE *
- ckfopen(file, mode)
- char *file;
- char *mode;
- {
- FILE *fp;
-
- if ((fp = fopen(file, mode)) == NULL) {
- fprintf(stderr, "Can't open %s\n", file);
- exit(2);
- }
- return fp;
- }
-
- void *
- ckmalloc(nbytes) {
- register char *p;
- char *malloc();
-
- if ((p = malloc(nbytes)) == NULL)
- error("Out of space");
- return p;
- }
-
- char *
- savestr(s)
- char *s;
- {
- register char *p;
-
- p = ckmalloc(strlen(s) + 1);
- strcpy(p, s);
- return p;
- }
-
- void
- error(msg)
- char *msg;
- {
- if (curfile != NULL)
- fprintf(stderr, "%s:%d: ", curfile, linno);
- fprintf(stderr, "%s\n", msg);
- exit(2);
- }
-