Add in a new standalone env applet for fixing up app's environments

-Erik

Changelog

@@ -1,3 +1,12 @@
+0.51pre
+	* Erik Andersen -- added env applet
+	* Erik Andersen -- Split utility.c into libbb
+	* <fixme>
+
+
+	 -Erik Andersen, not yet released
+
+
 0.50
 	* Erik Andersen -- added ifconfig interface status reporting 
 	* Erik Andersen -- Debian packaging updates

Config.h

@@ -32,6 +32,7 @@
 #define BB_DU
 //#define BB_DUMPKMAP
 #define BB_ECHO
+#define BB_ENV
 //#define BB_EXPR
 //#define BB_FBSET
 //#define BB_FDFLUSH

applets.h

@@ -131,6 +131,9 @@
 #if defined(BB_FEATURE_GREP_EGREP_ALIAS) && defined(BB_GREP)
 	APPLET_NOUSAGE("egrep", grep_main, _BB_DIR_BIN)
 #endif
+#ifdef BB_ENV
+	APPLET(env, env_main, _BB_DIR_USR_BIN)
+#endif
 #ifdef BB_EXPR
 	APPLET(expr, expr_main, _BB_DIR_USR_BIN)
 #endif

applets/usage.h

@@ -343,6 +343,15 @@
 	"$ echo "Erik\nis\ncool"\n" \
 	"Erik\nis\ncool\n"
 
+#define env_trivial_usage \
+	"[-] [-iu] [name=value ...] [command]"
+#define env_full_usage \
+	"Prints the current environment or runs a program after setting\n" \
+	"up the specified environment.\n\n" \
+	"Options:\n" \
+	"\t-, -i\tstart with an empty environment\n" \
+	"\t-u\tremove variable from the environment\n"
+
 #define expr_trivial_usage \
 	"EXPRESSION"
 #define expr_full_usage \

coreutils/env.c

@@ -0,0 +1,97 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * env implementation for busybox
+ *
+ * Copyright (c) 1988, 1993, 1994
+ *	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.
+ *
+ * Modified for BusyBox by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "busybox.h"
+
+extern int env_main(int argc, char** argv)
+{
+	char **ep, *p;
+	char *cleanenv[1];
+	int ch;
+
+	while ((ch = getopt(argc, argv, "-iu:")) != -1)
+		switch(ch) {
+		case '-':
+		case 'i':
+			environ = cleanenv;
+			cleanenv[0] = NULL;
+			break;
+		case 'u':
+			unsetenv(optarg);
+			break;
+		default:
+			show_usage();
+		}
+	for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv)
+		setenv(*argv, ++p, 1);
+	if (*argv) {
+		execvp(*argv, argv);
+		perror_msg_and_die("%s", *argv);
+	}
+	for (ep = environ; *ep; ep++)
+		printf("%s\n", *ep);
+	exit(EXIT_SUCCESS);
+}
+
+/*
+ * Copyright (c) 1988, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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> 
+ *
+ * 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.
+ */
+
+

env.c

@@ -0,0 +1,97 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * env implementation for busybox
+ *
+ * Copyright (c) 1988, 1993, 1994
+ *	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.
+ *
+ * Modified for BusyBox by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "busybox.h"
+
+extern int env_main(int argc, char** argv)
+{
+	char **ep, *p;
+	char *cleanenv[1];
+	int ch;
+
+	while ((ch = getopt(argc, argv, "-iu:")) != -1)
+		switch(ch) {
+		case '-':
+		case 'i':
+			environ = cleanenv;
+			cleanenv[0] = NULL;
+			break;
+		case 'u':
+			unsetenv(optarg);
+			break;
+		default:
+			show_usage();
+		}
+	for (argv += optind; *argv && (p = strchr(*argv, '=')); ++argv)
+		setenv(*argv, ++p, 1);
+	if (*argv) {
+		execvp(*argv, argv);
+		perror_msg_and_die("%s", *argv);
+	}
+	for (ep = environ; *ep; ep++)
+		printf("%s\n", *ep);
+	exit(EXIT_SUCCESS);
+}
+
+/*
+ * Copyright (c) 1988, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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> 
+ *
+ * 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.
+ */
+
+

include/applets.h

@@ -131,6 +131,9 @@
 #if defined(BB_FEATURE_GREP_EGREP_ALIAS) && defined(BB_GREP)
 	APPLET_NOUSAGE("egrep", grep_main, _BB_DIR_BIN)
 #endif
+#ifdef BB_ENV
+	APPLET(env, env_main, _BB_DIR_USR_BIN)
+#endif
 #ifdef BB_EXPR
 	APPLET(expr, expr_main, _BB_DIR_USR_BIN)
 #endif

include/usage.h

@@ -343,6 +343,15 @@
 	"$ echo "Erik\nis\ncool"\n" \
 	"Erik\nis\ncool\n"
 
+#define env_trivial_usage \
+	"[-] [-iu] [name=value ...] [command]"
+#define env_full_usage \
+	"Prints the current environment or runs a program after setting\n" \
+	"up the specified environment.\n\n" \
+	"Options:\n" \
+	"\t-, -i\tstart with an empty environment\n" \
+	"\t-u\tremove variable from the environment\n"
+
 #define expr_trivial_usage \
 	"EXPRESSION"
 #define expr_full_usage \

lash.c

@@ -143,7 +143,6 @@ struct close_me {
 
 /* function prototypes for builtins */
 static int builtin_cd(struct child_prog *cmd);
-static int builtin_env(struct child_prog *dummy);
 static int builtin_exec(struct child_prog *cmd);
 static int builtin_exit(struct child_prog *cmd);
 static int builtin_fg_bg(struct child_prog *cmd);
@@ -203,7 +202,6 @@ static struct built_in_command bltins[] = {
 /* Table of forking built-in functions (things that fork cannot change global
  * variables in the parent process, such as the current working directory) */
 static struct built_in_command bltins_forking[] = {
-	{"env", "Print all environment variables", builtin_env},
 	{"pwd", "Print current directory", builtin_pwd},
 	{"help", "List shell built-in commands", builtin_help},
 	{NULL, NULL, NULL}
@@ -256,14 +254,13 @@ static inline void debug_printf(const char *format, ...) { }
 builtin   previous use      notes
 ------ -----------------  ---------
 cd      cmd->progs[0]
-env     0
 exec    cmd->progs[0]  squashed bug: didn't look for applets or forking builtins
 exit    cmd->progs[0]
 fg_bg   cmd->progs[0], job_list->head, job_list->fg
 help    0
 jobs    job_list->head
 pwd     0
-export  cmd->progs[0]  passes cmd, job_list to builtin_env(), which ignores them
+export  cmd->progs[0]
 source  cmd->progs[0]
 unset   cmd->progs[0]
 read    cmd->progs[0]
@@ -302,17 +299,6 @@ static int builtin_cd(struct child_prog *child)
 	return EXIT_SUCCESS;
 }
 
-/* built-in 'env' handler */
-static int builtin_env(struct child_prog *dummy)
-{
-	char **e;
-
-	for (e = environ; *e; e++) {
-		printf( "%s\n", *e);
-	}
-	return (0);
-}
-
 /* built-in 'exec' handler */
 static int builtin_exec(struct child_prog *child)
 {
@@ -436,7 +422,10 @@ static int builtin_export(struct child_prog *child)
 	char *v = child->argv[1];
 
 	if (v == NULL) {
-		return (builtin_env(child));
+		char **e;
+		for (e = environ; *e; e++) {
+			printf( "%s\n", *e);
+		}
 	}
 	res = putenv(v);
 	if (res)

sh.c

@@ -143,7 +143,6 @@ struct close_me {
 
 /* function prototypes for builtins */
 static int builtin_cd(struct child_prog *cmd);
-static int builtin_env(struct child_prog *dummy);
 static int builtin_exec(struct child_prog *cmd);
 static int builtin_exit(struct child_prog *cmd);
 static int builtin_fg_bg(struct child_prog *cmd);
@@ -203,7 +202,6 @@ static struct built_in_command bltins[] = {
 /* Table of forking built-in functions (things that fork cannot change global
  * variables in the parent process, such as the current working directory) */
 static struct built_in_command bltins_forking[] = {
-	{"env", "Print all environment variables", builtin_env},
 	{"pwd", "Print current directory", builtin_pwd},
 	{"help", "List shell built-in commands", builtin_help},
 	{NULL, NULL, NULL}
@@ -256,14 +254,13 @@ static inline void debug_printf(const char *format, ...) { }
 builtin   previous use      notes
 ------ -----------------  ---------
 cd      cmd->progs[0]
-env     0
 exec    cmd->progs[0]  squashed bug: didn't look for applets or forking builtins
 exit    cmd->progs[0]
 fg_bg   cmd->progs[0], job_list->head, job_list->fg
 help    0
 jobs    job_list->head
 pwd     0
-export  cmd->progs[0]  passes cmd, job_list to builtin_env(), which ignores them
+export  cmd->progs[0]
 source  cmd->progs[0]
 unset   cmd->progs[0]
 read    cmd->progs[0]
@@ -302,17 +299,6 @@ static int builtin_cd(struct child_prog *child)
 	return EXIT_SUCCESS;
 }
 
-/* built-in 'env' handler */
-static int builtin_env(struct child_prog *dummy)
-{
-	char **e;
-
-	for (e = environ; *e; e++) {
-		printf( "%s\n", *e);
-	}
-	return (0);
-}
-
 /* built-in 'exec' handler */
 static int builtin_exec(struct child_prog *child)
 {
@@ -436,7 +422,10 @@ static int builtin_export(struct child_prog *child)
 	char *v = child->argv[1];
 
 	if (v == NULL) {
-		return (builtin_env(child));
+		char **e;
+		for (e = environ; *e; e++) {
+			printf( "%s\n", *e);
+		}
 	}
 	res = putenv(v);
 	if (res)

shell/lash.c

@@ -143,7 +143,6 @@ struct close_me {
 
 /* function prototypes for builtins */
 static int builtin_cd(struct child_prog *cmd);
-static int builtin_env(struct child_prog *dummy);
 static int builtin_exec(struct child_prog *cmd);
 static int builtin_exit(struct child_prog *cmd);
 static int builtin_fg_bg(struct child_prog *cmd);
@@ -203,7 +202,6 @@ static struct built_in_command bltins[] = {
 /* Table of forking built-in functions (things that fork cannot change global
  * variables in the parent process, such as the current working directory) */
 static struct built_in_command bltins_forking[] = {
-	{"env", "Print all environment variables", builtin_env},
 	{"pwd", "Print current directory", builtin_pwd},
 	{"help", "List shell built-in commands", builtin_help},
 	{NULL, NULL, NULL}
@@ -256,14 +254,13 @@ static inline void debug_printf(const char *format, ...) { }
 builtin   previous use      notes
 ------ -----------------  ---------
 cd      cmd->progs[0]
-env     0
 exec    cmd->progs[0]  squashed bug: didn't look for applets or forking builtins
 exit    cmd->progs[0]
 fg_bg   cmd->progs[0], job_list->head, job_list->fg
 help    0
 jobs    job_list->head
 pwd     0
-export  cmd->progs[0]  passes cmd, job_list to builtin_env(), which ignores them
+export  cmd->progs[0]
 source  cmd->progs[0]
 unset   cmd->progs[0]
 read    cmd->progs[0]
@@ -302,17 +299,6 @@ static int builtin_cd(struct child_prog *child)
 	return EXIT_SUCCESS;
 }
 
-/* built-in 'env' handler */
-static int builtin_env(struct child_prog *dummy)
-{
-	char **e;
-
-	for (e = environ; *e; e++) {
-		printf( "%s\n", *e);
-	}
-	return (0);
-}
-
 /* built-in 'exec' handler */
 static int builtin_exec(struct child_prog *child)
 {
@@ -436,7 +422,10 @@ static int builtin_export(struct child_prog *child)
 	char *v = child->argv[1];
 
 	if (v == NULL) {
-		return (builtin_env(child));
+		char **e;
+		for (e = environ; *e; e++) {
+			printf( "%s\n", *e);
+		}
 	}
 	res = putenv(v);
 	if (res)

usage.h

@@ -343,6 +343,15 @@
 	"$ echo "Erik\nis\ncool"\n" \
 	"Erik\nis\ncool\n"
 
+#define env_trivial_usage \
+	"[-] [-iu] [name=value ...] [command]"
+#define env_full_usage \
+	"Prints the current environment or runs a program after setting\n" \
+	"up the specified environment.\n\n" \
+	"Options:\n" \
+	"\t-, -i\tstart with an empty environment\n" \
+	"\t-u\tremove variable from the environment\n"
+
 #define expr_trivial_usage \
 	"EXPRESSION"
 #define expr_full_usage \