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set_unset.c
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set_unset.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* set_unset.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: marvin <marvin@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/01/16 15:50:47 by msoulaim #+# #+# */
/* Updated: 2022/12/16 13:31:45 by marvin ### ########.fr */
/* */
/* ************************************************************************** */
#include "minishell.h"
int search_env_pos(char *var, t_shell *shell)
{
int i;
char **g_env;
char *tmp;
i = 0;
g_env = shell->env;
tmp = ft_strjoin(var, "=");
while (g_env[i])
{
if (ft_strncmp(tmp, g_env[i], ft_strlen(tmp)) == 0)
{
free(tmp);
return (i);
}
i++;
}
free(tmp);
return (-1);
}
void remove_env_var(int var_pos, t_shell *shell)
{
int i;
int var_count;
free(shell->env[var_pos]);
shell->env[var_pos] = NULL;
i = var_pos;
var_count = var_pos + 1;
while (shell->env[i + 1])
{
shell->env[i] = ft_strdup(shell->env[i + 1]);
free(shell->env[i + 1]);
i++;
var_count++;
}
shell->env = d_realloc(shell->env, var_count - 1);
}
void set_env(char *arg1, char *arg2, t_shell *shell)
{
int pos;
if ((pos = search_env_pos(arg1, shell)) != -1)
{
free(shell->env[pos]);
shell->env[pos] = join_three(arg1, "=", arg2);
}
else
{
shell->env = d_realloc(shell->env, str2len(shell->env) + 1);
shell->env[str2len(shell->env)] = join_three(arg1, "=", arg2);
}
}
int ft_setenv(char **args_cmd, t_shell *shell)
{
int i;
i = str2len(args_cmd);
if (i > 2)
{
ft_putendl_fd("setenv: Too many arguments.", 2);
return (1);
}
else if (i == 1)
set_env(args_cmd[0], "", shell);
else if (i == 2)
set_env(args_cmd[0], args_cmd[1], shell);
return (0);
}
int ft_unsetenv(char **args, t_shell *shell)
{
int i;
int pos;
i = 0;
if (str2len(args) == 0)
{
ft_putendl_fd("unsetenv: Too few arguments.", 2);
return (1);
}
while (args[i])
{
if ((pos = search_env_pos(args[i], shell)) != -1)
remove_env_var(pos, shell);
i++;
}
return (0);
}