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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dirent.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#define MAX_HISTORY 100
#define MAX_COMMAND_LENGTH 255 // not setting a macro for the argument because they are included in the command
#define MAX_PATH_LENGTH 1024
struct command {
char *com;
char *arg;
};
struct exec_command {
const char *cmd;
void (*func)(const char *);
};
// code prototype functions
struct command split_command(char *input);
void exec_command(char *input);
// shell commands functions prototypes
void list(const char *path);
void make_dir(const char *path);
void remove_file(const char *path);
void copy_files(const char *arg);
void move_files(const char *arg);
void print_cdirectory(const char *arg);
void change_directory(const char *path);
void change_ownership(const char *path);
void clear(const char *arg);
void echo(const char *arg);
void exit_(const char *arg);
struct exec_command CommandsList[] = {
{"ls", list},
{"mkdir", make_dir},
{"rm", remove_file},
{"cp", copy_files},
{"mv", move_files},
{"chown", change_ownership},
{"pwd", print_cdirectory},
{"cd", change_directory},
{"clr", clear},
{"echo", echo},
{"exit", exit_}
};
// Code functions
struct command split_command(char *input) {
struct command user_command;
char *command = strtok(input, " ");
char *argument = strtok(NULL, " ");
user_command.com = strdup(command);
if (argument != NULL) {
user_command.arg = strdup(argument);
} else {
user_command.arg = NULL;
}
return user_command;
}
void exec_command(char *input) {
struct command user_command = split_command(input);
user_command.com[strcspn(user_command.com, "\n")] = '\0';
if (user_command.arg != NULL)
user_command.arg[strcspn(user_command.arg, "\n")] = '\0';
for (int i = 0; i < sizeof(CommandsList) / sizeof(CommandsList[0]); i++) {
if (strcmp(user_command.com, CommandsList[i].cmd) == 0) {
CommandsList[i].func(user_command.arg);
}
}
free(user_command.com);
free(user_command.arg);
}
// ls command
void list(const char *path) {
struct dirent *entry;
if (path == NULL) {
path = ".";
}
DIR *dP = opendir(path);
// check if the directory got opened successfully
if (dP == NULL) {
perror("opendir");
return;
}
// Print the folder|directory name
while ((entry = readdir(dP)) != NULL) {
printf("%s\n", entry->d_name);
}
closedir(dP);
}
void make_dir(const char *path) {
if (mkdir(path, 0755) == 0)
perror("failed to make directory");
}
void remove_file(const char *path) {
if (unlink(path) != 0) {
perror("failed to delete file");
}
}
void change_ownership(const char *path)
{
if((chmod(path,S_IRWXU) != 0))
{
perror("failed to get ownership of the file");
} else {
printf("file permissions updated succssfully");
}
}
void copy_files(const char *arg) {
printf("copy file");
}
void move_files(const char *arg) {
printf("move file");
}
void clear(const char *arg) {
printf("\033[2J");
printf("\033[3J");
printf("\033[H");
}
void echo(const char *arg) {
printf("%s", arg);
}
void exit_(const char *arg){
exit(0);
}
void print_cdirectory(const char *arg) {
char *current_working_directory = getcwd(NULL, 0);
printf("%s", current_working_directory);
}
void change_directory(const char *path) {
if (path == NULL) {
printf("No path found\n");
}
else if (chdir(path) != 0)
perror("path not found");
}
int main(void) {
clear("");
// ReSharper disable once CppDFAEndlessLoop
while (1) {
printf("\n$ ");
char *input = malloc(sizeof(char) * MAX_COMMAND_LENGTH);
fgets(input, MAX_COMMAND_LENGTH, stdin);
exec_command(input);
free(input);
}
}
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