mirror of https://github.com/n-hys/bash.git
95 lines
2.0 KiB
C
95 lines
2.0 KiB
C
/*
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* printenv -- minimal builtin clone of BSD printenv(1).
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*
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* usage: printenv [varname]
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*
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*/
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/*
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Copyright (C) 1999-2009 Free Software Foundation, Inc.
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This file is part of GNU Bash.
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Bash is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Bash is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bash. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <stdio.h>
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#include "builtins.h"
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#include "shell.h"
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#include "bashgetopt.h"
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#include "common.h"
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extern char **export_env;
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int
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printenv_builtin (list)
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WORD_LIST *list;
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{
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register char **envp;
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int opt;
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SHELL_VAR *var;
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reset_internal_getopt ();
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while ((opt = internal_getopt (list, "")) != -1)
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{
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switch (opt)
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{
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CASE_HELPOPT;
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default:
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builtin_usage ();
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return (EX_USAGE);
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}
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}
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list = loptend;
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/* printenv */
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if (list == 0)
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{
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maybe_make_export_env (); /* this allows minimal code */
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for (envp = export_env; *envp; envp++)
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printf ("%s\n", *envp);
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return (EXECUTION_SUCCESS);
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}
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/* printenv varname */
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var = find_variable (list->word->word);
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if (var == 0 || (exported_p (var) == 0))
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return (EXECUTION_FAILURE);
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if (function_p (var))
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print_var_function (var);
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else
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print_var_value (var, 0);
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printf("\n");
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return (EXECUTION_SUCCESS);
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}
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char *printenv_doc[] = {
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"Display environment.",
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"",
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"Print names and values of environment variables",
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(char *)NULL
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};
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struct builtin printenv_struct = {
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"printenv",
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printenv_builtin,
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BUILTIN_ENABLED,
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printenv_doc,
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"printenv [varname]",
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0
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};
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