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ft_minishell_parse_env.c
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ft_minishell_parse_env.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_minishell_parse_env.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: jtaylor <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/07/10 16:45:23 by jtaylor #+# #+# */
/* Updated: 2019/08/09 21:32:00 by jtaylor ### ########.fr */
/* */
/* ************************************************************************** */
#include "minishell.h"
/*
** this should return the only the path env variable
** be carefull strdup'ing the return of this function ,
** my ft_strdup segfaults if it tries to dupe NULL;
*/
char *get_env_variable(char *var_name)
{
int i;
char *tmp;
i = 0;
while (g_env[i])
{
tmp = ft_strjoin(var_name, "=");
if (ft_strstart_w_str(g_env[i], tmp))
{
free(tmp);
return (ft_strchr(g_env[i], '=') + 1);
}
free(tmp);
i++;
}
return (NULL);
}
char **empty_envv(char **envv)
{
ft_freestrarr(envv);
envv = (char **)malloc(sizeof(char *) * 2);
envv[0] = ft_strdup("");
envv[1] = NULL;
return (envv);
}
/*
** this is redudndent , printenv is in the $path
*/
void ft_minishell_printenv(char **args, char *str)
{
int i;
(void)str;
(void)args;
i = -1;
while (g_env[++i] && g_env[i] != NULL)
{
ft_putstr(g_env[i]);
write(1, "\n", 1);
}
}
/*
** returns the length of the shell envirement
*/
int grab_env_len(char **env)
{
int i;
i = -1;
while (env[++i])
;
return (i + 1);
}
/*
** this parses the env variables into the g_env global array
*/
void ft_minishell_parse_env(char **env)
{
int i;
i = -1;
g_env = (char **)malloc(sizeof(char *) * (grab_env_len(env) + 1));
while (env[++i])
if (!(g_env[i] = ft_strdup(env[i])))
ft_minishell_exit_shell();
g_env[i] = NULL;
}