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implemented a builtin echo command in ash. moved the guts of the

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echo applet into libbb, and now call bb_echo() from both echo.c
and ash.c
This commit is contained in:
Paul Fox 2005-08-09 19:38:05 +00:00
parent 3f11b1bf63
commit 0b62158475
7 changed files with 204 additions and 172 deletions
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1
coreutils/Config.in
View File

@ -156,6 +156,7 @@ config CONFIG_ECHO
help
echo is used to print a specified string to stdout.
# this entry also appears in shell/Config.in, next to the echo builtin
config CONFIG_FEATURE_FANCY_ECHO
bool " Enable echo options (-n and -e)"
default y

140
coreutils/echo.c
View File

@ -1,9 +1,5 @@
/* vi: set sw=4 ts=4: */
/*
* echo implementation for busybox
*
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
* echo applet implementation for busybox
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -19,20 +15,6 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Original copyright notice is retained at the end of this file.
*/
/* BB_AUDIT SUSv3 compliant -- unless configured as fancy echo. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/echo.html */
/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
* Because of behavioral differences, implemented configurable SUSv3
* or 'fancy' gnu-ish behaviors. Also, reduced size and fixed bugs.
* 1) In handling '\c' escape, the previous version only suppressed the
* trailing newline. SUSv3 specifies _no_ output after '\c'.
* 2) SUSv3 specifies that octal escapes are of the form \0{#{#{#}}}.
* The previous version version did not allow 4-digit octals.
*/
#include <stdio.h>
@ -42,124 +24,6 @@
extern int echo_main(int argc, char** argv)
{
#ifndef CONFIG_FEATURE_FANCY_ECHO
#define eflag '\\'
++argv;
#else
const char *p;
int nflag = 1;
int eflag = 0;
while (*++argv && (**argv == '-')) {
/* If it appears that we are handling options, then make sure
* that all of the options specified are actually valid.
* Otherwise, the string should just be echoed.
*/
if (!*(p = *argv + 1)) { /* A single '-', so echo it. */
goto just_echo;
}
do {
if (strrchr("neE", *p) == 0) {
goto just_echo;
}
} while (*++p);
/* All of the options in this arg are valid, so handle them. */
p = *argv + 1;
do {
if (*p == 'n') {
nflag = 0;
} else if (*p == 'e') {
eflag = '\\';
} else {
eflag = 0;
}
} while (*++p);
}
just_echo:
#endif
while (*argv) {
register int c;
while ((c = *(*argv)++)) {
if (c == eflag) { /* Check for escape seq. */
if (**argv == 'c') {
/* '\c' means cancel newline and
* ignore all subsequent chars. */
goto DONE;
}
#ifndef CONFIG_FEATURE_FANCY_ECHO
/* SUSv3 specifies that octal escapes must begin with '0'. */
if (((unsigned int)(**argv - '1')) >= 7)
#endif
{
/* Since SUSv3 mandates a first digit of 0, 4-digit octals
* of the form \0### are accepted. */
if ((**argv == '0') && (((unsigned int)(argv[0][1] - '0')) < 8)) {
(*argv)++;
}
/* bb_process_escape_sequence can handle nul correctly */
c = bb_process_escape_sequence((const char **) argv);
}
}
putchar(c);
}
if (*++argv) {
putchar(' ');
}
}
#ifdef CONFIG_FEATURE_FANCY_ECHO
if (nflag) {
putchar('\n');
}
#else
putchar('\n');
#endif
DONE:
(void)bb_echo(argc, argv);
bb_fflush_stdout_and_exit(EXIT_SUCCESS);
}
/*-
* 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.
*
* 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
* ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
*
* 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.
*
* @(#)echo.c 8.1 (Berkeley) 5/31/93
*/

2
include/libbb.h
View File

@ -105,6 +105,8 @@ extern void bb_perror_nomsg(void);
extern void bb_verror_msg(const char *s, va_list p) __attribute__ ((format (printf, 1, 0)));
extern void bb_vperror_msg(const char *s, va_list p) __attribute__ ((format (printf, 1, 0)));
extern int bb_echo(int argc, char** argv);
extern const char *bb_mode_string(int mode);
extern int is_directory(const char *name, int followLinks, struct stat *statBuf);

3
libbb/Makefile.in
View File

@ -46,7 +46,8 @@ LIBBB_SRC:= \
get_terminal_width_height.c fclose_nonstdin.c fflush_stdout_and_exit.c \
getopt_ulflags.c default_error_retval.c wfopen_input.c speed_table.c \
perror_nomsg_and_die.c perror_nomsg.c skip_whitespace.c bb_askpass.c \
warn_ignoring_args.c concat_subpath_file.c vfork_daemon_rexec.c
warn_ignoring_args.c concat_subpath_file.c vfork_daemon_rexec.c \
bb_echo.c
LIBBB_OBJS=$(patsubst %.c,$(LIBBB_DIR)%.o, $(LIBBB_SRC))

163
libbb/bb_echo.c Normal file
View File

@ -0,0 +1,163 @@
/* vi: set sw=4 ts=4: */
/*
* echo implementation for busybox
*
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Original copyright notice is retained at the end of this file.
*/
/* BB_AUDIT SUSv3 compliant -- unless configured as fancy echo. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/echo.html */
/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
* Because of behavioral differences, implemented configurable SUSv3
* or 'fancy' gnu-ish behaviors. Also, reduced size and fixed bugs.
* 1) In handling '\c' escape, the previous version only suppressed the
* trailing newline. SUSv3 specifies _no_ output after '\c'.
* 2) SUSv3 specifies that octal escapes are of the form \0{#{#{#}}}.
* The previous version version did not allow 4-digit octals.
*/
#include <stdio.h>
#include <string.h>
#include "busybox.h"
extern int bb_echo(int argc, char** argv)
{
#ifndef CONFIG_FEATURE_FANCY_ECHO
#define eflag '\\'
++argv;
#else
const char *p;
int nflag = 1;
int eflag = 0;
while (*++argv && (**argv == '-')) {
/* If it appears that we are handling options, then make sure
* that all of the options specified are actually valid.
* Otherwise, the string should just be echoed.
*/
if (!*(p = *argv + 1)) { /* A single '-', so echo it. */
goto just_echo;
}
do {
if (strrchr("neE", *p) == 0) {
goto just_echo;
}
} while (*++p);
/* All of the options in this arg are valid, so handle them. */
p = *argv + 1;
do {
if (*p == 'n') {
nflag = 0;
} else if (*p == 'e') {
eflag = '\\';
} else {
eflag = 0;
}
} while (*++p);
}
just_echo:
#endif
while (*argv) {
register int c;
while ((c = *(*argv)++)) {
if (c == eflag) { /* Check for escape seq. */
if (**argv == 'c') {
/* '\c' means cancel newline and
* ignore all subsequent chars. */
return 0;
}
#ifndef CONFIG_FEATURE_FANCY_ECHO
/* SUSv3 specifies that octal escapes must begin with '0'. */
if (((unsigned int)(**argv - '1')) >= 7)
#endif
{
/* Since SUSv3 mandates a first digit of 0, 4-digit octals
* of the form \0### are accepted. */
if ((**argv == '0') && (((unsigned int)(argv[0][1] - '0')) < 8)) {
(*argv)++;
}
/* bb_process_escape_sequence can handle nul correctly */
c = bb_process_escape_sequence((const char **) argv);
}
}
putchar(c);
}
if (*++argv) {
putchar(' ');
}
}
#ifdef CONFIG_FEATURE_FANCY_ECHO
if (nflag) {
putchar('\n');
}
#else
putchar('\n');
#endif
return 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.
*
* 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
* ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
*
* 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.
*
* @(#)echo.c 8.1 (Berkeley) 5/31/93
*/

15
shell/Config.in
View File

@ -103,6 +103,21 @@ config CONFIG_ASH_CMDCMD
you to run the specified command with the specified arguments,
even when there is an ash builtin command with the same name.
config CONFIG_ASH_BUILTIN_ECHO
bool " Enable builtin version of 'echo'"
default n
depends on CONFIG_ASH
help
Enable support for echo, built in to ash.
# this entry also appears in coreutils/Config.in, next to the echo applet
config CONFIG_FEATURE_FANCY_ECHO
bool " Enable echo options (-n and -e)"
default y
depends on CONFIG_ASH_BUILTIN_ECHO
help
This adds options (-n and -e) to echo.
config CONFIG_ASH_MAIL
bool " Check for new mail on interactive shells"
default y

52
shell/ash.c
View File

@ -1249,6 +1249,9 @@ static int commandcmd(int, char **);
#endif
static int dotcmd(int, char **);
static int evalcmd(int, char **);
#ifdef CONFIG_ASH_BUILTIN_ECHO
static int echocmd(int, char **);
#endif
static int execcmd(int, char **);
static int exitcmd(int, char **);
static int exportcmd(int, char **);
@ -1308,39 +1311,12 @@ struct builtincmd {
/* unsigned flags; */
};
#ifdef CONFIG_ASH_CMDCMD
# ifdef JOBS
# ifdef CONFIG_ASH_ALIAS
# define COMMANDCMD (builtincmd + 7)
# define EXECCMD (builtincmd + 10)
# else
# define COMMANDCMD (builtincmd + 6)
# define EXECCMD (builtincmd + 9)
# endif
# else /* ! JOBS */
# ifdef CONFIG_ASH_ALIAS
# define COMMANDCMD (builtincmd + 6)
# define EXECCMD (builtincmd + 9)
# else
# define COMMANDCMD (builtincmd + 5)
# define EXECCMD (builtincmd + 8)
# endif
# endif /* JOBS */
#else /* ! CONFIG_ASH_CMDCMD */
# ifdef JOBS
# ifdef CONFIG_ASH_ALIAS
# define EXECCMD (builtincmd + 9)
# else
# define EXECCMD (builtincmd + 8)
# endif
# else /* ! JOBS */
# ifdef CONFIG_ASH_ALIAS
# define EXECCMD (builtincmd + 8)
# else
# define EXECCMD (builtincmd + 7)
# endif
# endif /* JOBS */
#endif /* CONFIG_ASH_CMDCMD */
#define COMMANDCMD (builtincmd + 5 + \
ENABLE_ASH_ALIAS + ENABLE_ASH_JOB_CONTROL)
#define EXECCMD (builtincmd + 7 + \
ENABLE_ASH_CMDCMD + ENABLE_ASH_ALIAS + \
ENABLE_ASH_BUILTIN_ECHO + ENABLE_ASH_JOB_CONTROL)
#define BUILTIN_NOSPEC "0"
#define BUILTIN_SPECIAL "1"
@ -1371,6 +1347,9 @@ static const struct builtincmd builtincmd[] = {
{ BUILTIN_REGULAR "command", commandcmd },
#endif
{ BUILTIN_SPEC_REG "continue", breakcmd },
#ifdef CONFIG_ASH_BUILTIN_ECHO
{ BUILTIN_REGULAR "echo", echocmd },
#endif
{ BUILTIN_SPEC_REG "eval", evalcmd },
{ BUILTIN_SPEC_REG "exec", execcmd },
{ BUILTIN_SPEC_REG "exit", exitcmd },
@ -8200,6 +8179,13 @@ exitcmd(int argc, char **argv)
/* NOTREACHED */
}
#ifdef CONFIG_ASH_BUILTIN_ECHO
static int
echocmd(int argc, char **argv)
{
return bb_echo(argc, argv);
}
#endif
/* $NetBSD: memalloc.c,v 1.27 2003/01/22 20:36:04 dsl Exp $ */
/*