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#include "builtin.h"
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
static int shellcd(const size_t n, char * const args[n]);
static const char * const builtins[] = {
"cd"
};
static int (*functions[])(const size_t n, char * const args[n]) = {
shellcd
};
int execbuiltin(size_t index, const size_t n, char * const args[n]) {
return (*functions[index])(n, args);
}
size_t checkbuiltin(const char * const function) {
size_t len = sizeof(builtins) / sizeof(builtins[0]);
for (size_t i = 0; i < len; i++) {
if (strcmp(builtins[i], function) == 0) {
return i;
}
}
return -1;
}
static int shellcd(const size_t n, char * const args[n]) {
int status;
char *home = getenv("HOME");
if (n == 2) {
status = chdir(args[1]);
} else if (n == 1) {
status = chdir(home);
} else {
errno = E2BIG;
status = -1;
}
if (status != 0) {
perror("cd");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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