62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* unset.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: lperrey <lperrey@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2021/12/05 17:05:05 by lperrey #+# #+# */
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/* Updated: 2021/12/22 19:23:50 by lperrey ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "minishell.h"
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static int unset_env_var(char *arg);
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int builtin_unset(int argc, char *argv[], t_all *c)
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{
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int i;
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int exit_value;
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(void)argc;
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(void)c;
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exit_value = EXIT_SUCCESS;
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i = 1;
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while (argv[i])
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{
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if (unset_env_var(argv[i]) == EXIT_FAILURE)
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exit_value = EXIT_FAILURE;
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if (ft_strncmp(argv[i], "PATH", 4 + 1) == 0)
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retrieve_path(&c->path);
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i++;
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}
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return (exit_value);
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}
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static int unset_env_var(char *arg)
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{
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int env_position;
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if (!ft_is_posix_name(arg))
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{
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shell_error("unset: ", arg, ": not a valid identifier", 0);
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return (EXIT_FAILURE);
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}
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env_position = ft_getenv_position(arg);
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free(environ[env_position]);
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while (environ[env_position])
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{
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environ[env_position] = environ[env_position + 1];
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env_position++;
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}
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return (EXIT_SUCCESS);
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}
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/*
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environment variables must be POSIX NAME :
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3.235 Name
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https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html
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#tag_03_235
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*/
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