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export builtin

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This commit is contained in:
LuckyLaszlo
2021-12-04 18:14:24 +01:00
parent 2eed0f2d45
commit 27c00a78a0
4 changed files with 109 additions and 23 deletions
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122
srcs/builtins/export.c
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@@ -1,33 +1,119 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* export.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: lperrey <lperrey@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/12/03 13:36:54 by lperrey #+# #+# */
/* Updated: 2021/12/04 16:07:21 by lperrey ### ########.fr */
/* */
/* ************************************************************************** */
#include "minishell.h"
int getenv_position(char **envp, char *name) // TODO : virer arg envp et utiliser "extern **environ" à la place
char *ft_getenv(char *env_var);
size_t ft_getenv_position(char *env_var);
static int change_env_value(char *arg);
// in complete shell, must mark all arguments for export
// (Not implemented in minishell)
int builtin_export(int argc, char *argv[], t_all *c)
{
int i;
i = 0;
while (envp[i] && ft_strncmp(envp[i], name, ft_strlen(name)))
(void)argc;
i = 1;
while (argv[i])
{
if (ft_strchr(argv[i], '='))
{
if (!change_env_value(argv[i]))
return (EXIT_FAILURE);
if (ft_strncmp(argv[i], "PATH=", 5) == 0)
c->path = retrieve_path();
}
i++;
return (i);
}
return (EXIT_SUCCESS);
}
int builtin_export(int argc, char *argv[], t_all *c)
static int change_env_value(char *arg)
{
char **var;
int env_position;
char **var_split;
int env_position;
(void)argc;
(void)c;
if (!ft_strchr(argv[1], '='))
return (0);
var = ft_split(argv[1], '=');
env_position = getenv_position(environ, var[0]);
if (environ[env_position] == '\0')
var_split = ft_split(arg, '=');
if (!var_split)
return (ft_reti_perror(-1, "builtin_export, ft_split()"));
env_position = ft_getenv_position(var_split[0]);
ft_free_2d_arr(var_split);
if (environ[env_position] == NULL)
{
environ = ft_resize_2d_arr(environ, 1);
environ[env_position] = ft_strdup(argv[1]);
if (!ft_strncmp(var[0], "PATH", 4 + 1)) // TODO : NON. Ce n'est pas la fin de la string donc "strlen() + 1" n'est pas adapté
c->path = retrieve_path();
// free var
if (!environ)
return (ft_reti_perror(-1, "builtin_export, ft_resize_2d_arr()"));
}
environ[env_position] = ft_strdup(arg);
if (!environ[env_position])
return (ft_reti_perror(-1, "builtin_export, ft_strdup()"));
return (0);
}
/*
** Search for an environement variable,
** and return a pointer to the first character after "env_var=" .
** Return NULL if env_var not found.
*/
char *ft_getenv(char *env_var)
{
int i;
char *tmp;
size_t env_var_len;
env_var_len = ft_strlen(env_var);
i = 0;
tmp = NULL;
while (!tmp && environ[i])
{
if (environ[i][env_var_len] == '=')
{
if (ft_strncmp(environ[i], env_var, env_var_len) == 0)
tmp = &environ[i][env_var_len + 1];
else
i++;
}
else
i++;
}
return (tmp);
}
/*
** Like ft_getenv(), but return position of env_var instead of value.
** If env_var not found, return last position of **environ (== NULL)
*/
size_t ft_getenv_position(char *env_var)
{
int i;
int found;
size_t env_var_len;
env_var_len = ft_strlen(env_var);
i = 0;
found = 0;
while (!found && environ[i])
{
if (environ[i][env_var_len] == '=')
{
if (ft_strncmp(environ[i], env_var, env_var_len) == 0)
found = 1;
else
i++;
}
else
i++;
}
return (i);
}