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/*
*
*/
#include "builtin.h"
#include "variables.h"
#include <unistd.h>
struct builtin {
char *name;
int (*builtin_func)(const char **);
};
static int builtin_cd(const char *args[]) {
const char *dir = (args[1]) ? args[1] : get_variable("$HOME");
int res = chdir(dir);
if (res != 0) {
perror("cd:");
return 0;
}
return 1;
}
static int builtin_export(const char *args[]) {
const char *key = args[1];
if (!key) {
fprintf(stderr, "export: no variable name specified\n");
return 0;
}
if (!promote_variable_to_env(key)) {
perror("export:");
return 0;
}
return 1;
}
static int builtin_pwd(const char *args[]) {
char buffer[PATH_MAX];
char *path = getcwd(buffer, PATH_MAX);
if (path) {
fprintf(stdout, "%s\n", path);
return 1;
}
perror("pwd:");
return 0;
}
static int builtin_exit(const char *args[]) { exit(EXIT_SUCCESS); }
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
static struct builtin builtin_lookup[] = {
{.name = "cd", .builtin_func = builtin_cd},
{.name = "export", .builtin_func = builtin_export},
{.name = "pwd", .builtin_func = builtin_pwd},
{.name = "exit", .builtin_func = builtin_exit}};
static const size_t BUILTIN_CNT = ARRAY_SIZE(builtin_lookup);
bool run_builtin(command *cmd) {
for (size_t i = 0; i < BUILTIN_CNT; i++) {
if (!strcmp(cmd->command, builtin_lookup[i].name)) {
builtin_lookup[i].builtin_func(cmd->args);
return true;
}
}
return false;
}
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