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add a printenv implementation

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This commit is contained in:
Mike Frysinger 2005-04-21 23:23:13 +00:00
parent c0bc9652fd
commit 6d1d2e59bf
3 changed files with 59 additions and 0 deletions
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6
coreutils/Config.in
View File

@ -164,6 +164,12 @@ config CONFIG_ENV
a command; without options it displays the current
environment.
config CONFIG_PRINTENV
bool "printenv"
default n
help
printenv is used to print all or part of environment.
config CONFIG_EXPR
bool "expr"
default n

1
coreutils/Makefile.in
View File

@ -60,6 +60,7 @@ COREUTILS-$(CONFIG_MKNOD) += mknod.o
COREUTILS-$(CONFIG_MV) += mv.o
COREUTILS-$(CONFIG_NICE) += nice.o
COREUTILS-$(CONFIG_OD) += od.o
COREUTILS-$(CONFIG_PRINTENV) += printenv.o
COREUTILS-$(CONFIG_PRINTF) += printf.o
COREUTILS-$(CONFIG_PWD) += pwd.o
COREUTILS-$(CONFIG_REALPATH) += realpath.o

52
coreutils/printenv.c Normal file
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@ -0,0 +1,52 @@
/*
* printenv implementation for busybox
*
* Copyright (C) 2005 by Erik Andersen <andersen@codepoet.org>
* Copyright (C) 2005 by Mike Frysinger <vapier@gentoo.org>
*
* 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
*
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int printenv_main(int argc, char **argv)
{
extern char **environ;
int e = 0;
/* no variables specified, show whole env */
if (argc == 1)
while (environ[e])
puts(environ[e++]);
/* search for specified variables and print them out if found */
else {
int i;
size_t l;
char *arg, *env;
for (i=1; (arg = argv[i]); ++i)
for (; (env = environ[e]); ++e) {
l = strlen(arg);
if (!strncmp(env, arg, l) && env[l] == '=')
puts(env + l + 1);
}
}
exit(EXIT_SUCCESS);
}