mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-03 09:00:21 +00:00
sh: Remove mkinit.
Replace the RESET blocks with regular functions and a reset() function that calls them all. This code generation tool is unusual and does not appear to provide much benefit. I do not think isolating the knowledge about which modules need to be reset is worth an almost 500-line build tool and wider scope for variables used by the reset functions. Also, relying on reset functions is often wrong: the cleanup should be done in exception handlers so that no stale state remains after 'command eval' and the like.
This commit is contained in:
Jilles Tjoelker
parent
f85336594c
commit
338b821b0f
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=253650
@ -8,7 +8,7 @@ SHSRCS= alias.c arith_yacc.c arith_yylex.c cd.c echo.c error.c eval.c \
|
||||
histedit.c input.c jobs.c kill.c mail.c main.c memalloc.c miscbltin.c \
|
||||
mystring.c options.c output.c parser.c printf.c redir.c show.c \
|
||||
test.c trap.c var.c
|
||||
GENSRCS= builtins.c init.c nodes.c syntax.c
|
||||
GENSRCS= builtins.c nodes.c syntax.c
|
||||
GENHDRS= builtins.h nodes.h syntax.h token.h
|
||||
SRCS= ${SHSRCS} ${GENSRCS} ${GENHDRS}
|
||||
|
||||
@ -30,26 +30,21 @@ WFORMAT=0
|
||||
${.CURDIR}/../test \
|
||||
${.CURDIR}/../../usr.bin/printf
|
||||
|
||||
CLEANFILES+= mkinit mkinit.o mknodes mknodes.o \
|
||||
CLEANFILES+= mknodes mknodes.o \
|
||||
mksyntax mksyntax.o
|
||||
CLEANFILES+= ${GENSRCS} ${GENHDRS}
|
||||
|
||||
build-tools: mkinit mknodes mksyntax
|
||||
build-tools: mknodes mksyntax
|
||||
|
||||
.ORDER: builtins.c builtins.h
|
||||
builtins.c builtins.h: mkbuiltins builtins.def
|
||||
sh ${.CURDIR}/mkbuiltins ${.CURDIR}
|
||||
|
||||
init.c: mkinit alias.c eval.c exec.c input.c jobs.c options.c parser.c \
|
||||
redir.c trap.c var.c
|
||||
./mkinit ${.ALLSRC:S/^mkinit$//}
|
||||
|
||||
# XXX this is just to stop the default .c rule being used, so that the
|
||||
# intermediate object has a fixed name.
|
||||
# XXX we have a default .c rule, but no default .o rule.
|
||||
.o:
|
||||
${CC} ${CFLAGS} ${LDFLAGS} ${.IMPSRC} ${LDLIBS} -o ${.TARGET}
|
||||
mkinit: mkinit.o
|
||||
mknodes: mknodes.o
|
||||
mksyntax: mksyntax.o
|
||||
|
||||
|
||||
29
bin/sh/TOUR
29
bin/sh/TOUR
@ -25,38 +25,11 @@ programs is:
|
||||
program input files generates
|
||||
------- ----------- ---------
|
||||
mkbuiltins builtins builtins.h builtins.c
|
||||
mkinit *.c init.c
|
||||
mknodes nodetypes nodes.h nodes.c
|
||||
mksyntax - syntax.h syntax.c
|
||||
mktokens - token.h
|
||||
|
||||
There are undoubtedly too many of these. Mkinit searches all the
|
||||
C source files for entries looking like:
|
||||
|
||||
RESET {
|
||||
x = 2; /* executed when the shell does a longjmp
|
||||
back to the main command loop */
|
||||
}
|
||||
|
||||
It pulls this code out into routines which are when particular
|
||||
events occur. The intent is to improve modularity by isolating
|
||||
the information about which modules need to be explicitly
|
||||
initialized/reset within the modules themselves.
|
||||
|
||||
Mkinit recognizes several constructs for placing declarations in
|
||||
the init.c file.
|
||||
INCLUDE "file.h"
|
||||
includes a file. The storage class MKINIT makes a declaration
|
||||
available in the init.c file, for example:
|
||||
MKINIT int funcnest; /* depth of function calls */
|
||||
MKINIT alone on a line introduces a structure or union declara-
|
||||
tion:
|
||||
MKINIT
|
||||
struct redirtab {
|
||||
short renamed[10];
|
||||
};
|
||||
Preprocessor #define statements are copied to init.c without any
|
||||
special action to request this.
|
||||
There are undoubtedly too many of these.
|
||||
|
||||
EXCEPTIONS: Code for dealing with exceptions appears in
|
||||
exceptions.c. The C language doesn't include exception handling,
|
||||
|
||||
@ -104,16 +104,13 @@ static void prehash(union node *);
|
||||
* Called to reset things after an exception.
|
||||
*/
|
||||
|
||||
#ifdef mkinit
|
||||
INCLUDE "eval.h"
|
||||
|
||||
RESET {
|
||||
void
|
||||
reseteval(void)
|
||||
{
|
||||
evalskip = 0;
|
||||
loopnest = 0;
|
||||
funcnest = 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
/*
|
||||
|
||||
@ -46,6 +46,8 @@ struct backcmd { /* result of evalbackcmd */
|
||||
struct job *jp; /* job structure for command */
|
||||
};
|
||||
|
||||
void reseteval(void);
|
||||
|
||||
/* flags in argument to evaltree/evalstring */
|
||||
#define EV_EXIT 01 /* exit after evaluating tree */
|
||||
#define EV_TESTED 02 /* exit status is checked; ignore -e flag */
|
||||
|
||||
@ -70,7 +70,6 @@ __FBSDID("$FreeBSD$");
|
||||
#include "syntax.h"
|
||||
#include "memalloc.h"
|
||||
#include "error.h"
|
||||
#include "init.h"
|
||||
#include "mystring.h"
|
||||
#include "show.h"
|
||||
#include "jobs.h"
|
||||
|
||||
@ -1,36 +0,0 @@
|
||||
/*-
|
||||
* Copyright (c) 1991, 1993
|
||||
* 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.
|
||||
* 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.
|
||||
*
|
||||
* @(#)init.h 8.2 (Berkeley) 5/4/95
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
void reset(void);
|
||||
@ -108,15 +108,12 @@ static void pushfile(void);
|
||||
static int preadfd(void);
|
||||
static void popstring(void);
|
||||
|
||||
#ifdef mkinit
|
||||
INCLUDE "input.h"
|
||||
INCLUDE "error.h"
|
||||
|
||||
RESET {
|
||||
void
|
||||
resetinput(void)
|
||||
{
|
||||
popallfiles();
|
||||
parselleft = parsenleft = 0; /* clear input buffer */
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
|
||||
@ -47,6 +47,7 @@ extern const char *parsenextc; /* next character in input buffer */
|
||||
struct alias;
|
||||
struct parsefile;
|
||||
|
||||
void resetinput(void);
|
||||
char *pfgets(char *, int);
|
||||
int pgetc(void);
|
||||
int preadbuffer(void);
|
||||
|
||||
@ -68,10 +68,10 @@ __FBSDID("$FreeBSD$");
|
||||
#include "show.h"
|
||||
#include "memalloc.h"
|
||||
#include "error.h"
|
||||
#include "init.h"
|
||||
#include "mystring.h"
|
||||
#include "exec.h"
|
||||
#include "cd.h"
|
||||
#include "redir.h"
|
||||
#include "builtins.h"
|
||||
|
||||
int rootpid;
|
||||
@ -79,6 +79,7 @@ int rootshell;
|
||||
struct jmploc main_handler;
|
||||
int localeisutf8, initial_localeisutf8;
|
||||
|
||||
static void reset(void);
|
||||
static void cmdloop(int);
|
||||
static void read_profile(const char *);
|
||||
static char *find_dot_file(char *);
|
||||
@ -179,6 +180,14 @@ main(int argc, char *argv[])
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
reset(void)
|
||||
{
|
||||
reseteval();
|
||||
resetinput();
|
||||
resetparser();
|
||||
resetredir();
|
||||
}
|
||||
|
||||
/*
|
||||
* Read and execute commands. "Top" is nonzero for the top level command
|
||||
|
||||
480
bin/sh/mkinit.c
480
bin/sh/mkinit.c
@ -1,480 +0,0 @@
|
||||
/*-
|
||||
* Copyright (c) 1991, 1993
|
||||
* 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.
|
||||
* 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
|
||||
static char const copyright[] =
|
||||
"@(#) Copyright (c) 1991, 1993\n\
|
||||
The Regents of the University of California. All rights reserved.\n";
|
||||
#endif /* not lint */
|
||||
|
||||
#ifndef lint
|
||||
#if 0
|
||||
static char sccsid[] = "@(#)mkinit.c 8.2 (Berkeley) 5/4/95";
|
||||
#endif
|
||||
#endif /* not lint */
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
/*
|
||||
* 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.
|
||||
*
|
||||
* Usage: mkinit sourcefile...
|
||||
*/
|
||||
|
||||
|
||||
#include <sys/types.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <fcntl.h>
|
||||
#include <unistd.h>
|
||||
#include <errno.h>
|
||||
|
||||
|
||||
/*
|
||||
* OUTFILE is the name of the output file. Output is initially written
|
||||
* to the file OUTTEMP, which is then moved to OUTFILE.
|
||||
*/
|
||||
|
||||
#define OUTFILE "init.c"
|
||||
#define OUTTEMP "init.c.new"
|
||||
|
||||
|
||||
/*
|
||||
* A text structure is basically 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 {
|
||||
const char *name; /* name of event (e.g. RESET) */
|
||||
const char *routine; /* name of routine called on event */
|
||||
const 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 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";
|
||||
|
||||
|
||||
struct event event[] = {
|
||||
{ "RESET", "reset", reset, { NULL, 0, NULL, NULL } },
|
||||
{ NULL, NULL, NULL, { NULL, 0, NULL, NULL } }
|
||||
};
|
||||
|
||||
|
||||
const 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(const char *);
|
||||
int match(const char *, const char *);
|
||||
int gooddefine(const char *);
|
||||
void doevent(struct event *, FILE *, const char *);
|
||||
void doinclude(char *);
|
||||
void dodecl(char *, FILE *);
|
||||
void output(void);
|
||||
void addstr(const char *, struct text *);
|
||||
void addchar(int, struct text *);
|
||||
void writetext(struct text *, FILE *);
|
||||
FILE *ckfopen(const char *, const char *);
|
||||
void *ckmalloc(size_t);
|
||||
char *savestr(const char *);
|
||||
void error(const char *);
|
||||
|
||||
#define equal(s1, s2) (strcmp(s1, s2) == 0)
|
||||
|
||||
int
|
||||
main(int argc __unused, char *argv[])
|
||||
{
|
||||
char **ap;
|
||||
|
||||
header_files[0] = savestr("\"shell.h\"");
|
||||
header_files[1] = savestr("\"mystring.h\"");
|
||||
header_files[2] = savestr("\"init.h\"");
|
||||
for (ap = argv + 1 ; *ap ; ap++)
|
||||
readfile(*ap);
|
||||
output();
|
||||
rename(OUTTEMP, OUTFILE);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Parse an input file.
|
||||
*/
|
||||
|
||||
void
|
||||
readfile(const 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)) {
|
||||
char *cp;
|
||||
char line2[1024];
|
||||
static const char undef[] = "#undef ";
|
||||
|
||||
strcpy(line2, line);
|
||||
memcpy(line2, undef, sizeof(undef) - 1);
|
||||
cp = line2 + sizeof(undef) - 1;
|
||||
while(*cp && (*cp == ' ' || *cp == '\t'))
|
||||
cp++;
|
||||
while(*cp && *cp != ' ' && *cp != '\t' && *cp != '\n')
|
||||
cp++;
|
||||
*cp++ = '\n'; *cp = '\0';
|
||||
addstr(line2, &defines);
|
||||
addstr(line, &defines);
|
||||
}
|
||||
}
|
||||
fclose(fp);
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
match(const char *name, const char *line)
|
||||
{
|
||||
const 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(const char *line)
|
||||
{
|
||||
const 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(struct event *ep, FILE *fp, const char *fname)
|
||||
{
|
||||
char line[1024];
|
||||
int indent;
|
||||
const 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(char *line)
|
||||
{
|
||||
char *p;
|
||||
char *name;
|
||||
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(char *line1, FILE *fp)
|
||||
{
|
||||
char line[1024];
|
||||
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 && strchr("=/\n", *p) == NULL; p++)
|
||||
continue;
|
||||
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(void)
|
||||
{
|
||||
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(void)\n{\n", ep->routine);
|
||||
writetext(&ep->code, fp);
|
||||
fprintf(fp, "}\n");
|
||||
}
|
||||
fclose(fp);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* 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(const char *s, struct text *text)
|
||||
{
|
||||
while (*s) {
|
||||
if (--text->nleft < 0)
|
||||
addchar(*s++, text);
|
||||
else
|
||||
*text->nextc++ = *s++;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
addchar(int c, 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(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(const char *file, const char *mode)
|
||||
{
|
||||
FILE *fp;
|
||||
|
||||
if ((fp = fopen(file, mode)) == NULL) {
|
||||
fprintf(stderr, "Can't open %s: %s\n", file, strerror(errno));
|
||||
exit(2);
|
||||
}
|
||||
return fp;
|
||||
}
|
||||
|
||||
void *
|
||||
ckmalloc(size_t nbytes)
|
||||
{
|
||||
char *p;
|
||||
|
||||
if ((p = malloc(nbytes)) == NULL)
|
||||
error("Out of space");
|
||||
return p;
|
||||
}
|
||||
|
||||
char *
|
||||
savestr(const char *s)
|
||||
{
|
||||
char *p;
|
||||
|
||||
p = ckmalloc(strlen(s) + 1);
|
||||
strcpy(p, s);
|
||||
return p;
|
||||
}
|
||||
|
||||
void
|
||||
error(const char *msg)
|
||||
{
|
||||
if (curfile != NULL)
|
||||
fprintf(stderr, "%s:%d: ", curfile, linno);
|
||||
fprintf(stderr, "%s\n", msg);
|
||||
exit(2);
|
||||
}
|
||||
@ -1819,13 +1819,13 @@ parsearith: {
|
||||
} /* end of readtoken */
|
||||
|
||||
|
||||
|
||||
#ifdef mkinit
|
||||
RESET {
|
||||
void
|
||||
resetparser(void)
|
||||
{
|
||||
tokpushback = 0;
|
||||
checkkwd = 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
* Returns true if the text contains nothing to expand (no dollar signs
|
||||
|
||||
@ -79,6 +79,7 @@ extern const char *const parsekwd[];
|
||||
|
||||
union node *parsecmd(int);
|
||||
void fixredir(union node *, const char *, int);
|
||||
void resetparser(void);
|
||||
int goodname(const char *);
|
||||
int isassignment(const char *);
|
||||
char *getprompt(void *);
|
||||
|
||||
@ -324,16 +324,13 @@ popredir(void)
|
||||
* Undo all redirections. Called on error or interrupt.
|
||||
*/
|
||||
|
||||
#ifdef mkinit
|
||||
|
||||
INCLUDE "redir.h"
|
||||
|
||||
RESET {
|
||||
void
|
||||
resetredir(void)
|
||||
{
|
||||
while (redirlist)
|
||||
popredir();
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
/* Return true if fd 0 has already been redirected at least once. */
|
||||
int
|
||||
|
||||
@ -40,6 +40,7 @@
|
||||
union node;
|
||||
void redirect(union node *, int);
|
||||
void popredir(void);
|
||||
void resetredir(void);
|
||||
int fd0_redirected_p(void);
|
||||
void clearredir(void);
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user