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environ.c
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environ.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* environ.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: vgrankul <vgrankul@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/10/22 11:28:19 by vgrankul #+# #+# */
/* Updated: 2020/09/16 15:17:23 by vgrankul ### ########.fr */
/* */
/* ************************************************************************** */
#include "./includes/shell.h"
char *env_strchr(const char *s, int c)
{
char value;
char *str;
value = (char)c;
str = (char*)s;
if (value == '\0')
return (&str[ft_strlen(str)]);
while (*str != '\0')
{
if (*str == value)
{
str++;
return (str);
}
str++;
}
return (NULL);
}
int count_arr(char **arr)
{
int i;
i = 0;
while (arr[i] != NULL)
i++;
return (i);
}
char *get_env_value(char *name, char **env)
{
int i;
char *value;
i = 0;
if (!(name))
return (NULL);
while (env[i] != NULL)
{
if (ft_strncmp(name, env[i], ft_strlen(name)) == 0)
{
if ((value = env_strchr(env[i], '=')))
return (value);
}
i++;
}
return (NULL);
}
int find_env(const char *name, char **env)
{
int i;
char *env_name;
i = 0;
if (!(name))
return (EXIT_FAILURE);
while (env[i] != NULL)
{
if (ft_strcmp(name, (env_name = get_env_name(env[i]))) == 0)
{
free(env_name);
return (0);
}
free(env_name);
i++;
}
return (i);
}
char **copy_env(char **environ)
{
int i;
char **env;
i = 0;
if ((env = (char**)malloc(count_arr(environ) * sizeof(char*) + 1)))
{
while (environ[i] != NULL)
{
if (ft_strncmp(environ[i], "SHELL=", 6) == 0)
{
env[i] =
ft_strdup("SHELL=/home/vgrankul/projects/minishell/minishell");
if (!(env[i]))
return (NULL);
}
else
{
if (!(env[i] = ft_strdup(environ[i])))
return (NULL);
}
i++;
}
}
env[i] = NULL;
return (env);
}