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#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "builtins.h"
#include "utils/env.h"
int cd_pointpoint(char *path, char *old)
{
char *current = strrchr(path, '/');
size_t len = current - path;
if (len == 0)
{
fprintf(stderr, "cd: error with ..\n");
return 2;
}
char *parent = malloc(len + 1);
memcpy(parent, current, len);
parent[len] = '\0';
old = path;
path = parent;
env_set("OLDPWD", old);
env_set("PWD", path);
free(parent);
return 0;
}
int cd(struct string **args)
{
if (args[0] == NULL || args[1] != NULL)
{
fprintf(stderr, "cd: error too many arguments\n");
fflush(stdout);
return 2;
}
if (strcmp(env_get("PWD"), "") == 0)
{
fprintf(stderr, "cd: error with PWD\n");
fflush(stdout);
return 2;
}
char *old = env_get("OLDPWD");
char *path = env_get("PWD");
char *tmp = old;
if (strcmp(args[0]->data, "-") == 0)
{
if (strcmp(old, "") == 0)
{
fprintf(stderr, "cd: error with OLDPWD\n");
fflush(stdout);
return 2;
}
printf("%s\n", old);
old = path;
path = tmp;
}
else if (strcmp(args[0]->data, "..") == 0)
{
int res = cd_pointpoint(path, old);
fflush(stdout);
return res;
}
else
{
old = path;
path = args[0]->data;
}
env_set("OLDPWD", old);
env_set("PWD", path);
fflush(stdout);
return 0;
}
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