// i can do it better ..
int switch_cmd(FILE *fd, struct opt options) {
int ret;
switch(options.act) {
case CUSTOM:
ret = custom_cmd(fd, options.custom_cmd);
break;
case READ:
ret = rw_cmd(fd, options);
break;
case WRITE:
ret = rw_cmd(fd, options);
break;
case SEARCH:
ret = search_cmd(fd, options);
break;
case LIST:
ret = list_cmd(fd);
break;
case INFO:
ret = info_cmd(fd);
break;
}
return ret;
}
void set_cmd(t_app *app)
{
if (app->cur_cmd->first->command[0] == '.' ||
app->cur_cmd->first->command[0] == '/')
app->cur_cmd->cmd = check_cmd(app);
else
app->cur_cmd->cmd = search_cmd(app);
}
int main(void){
char cmd[MAX_CMD_LENGTH]=""; //Command entered by the user including arguments,pipes,redirections,etc.
char *tokens[MAX_CMD_LENGTH]={NULL}; //Stores the parsed command(Eg: token[0]=ls, token[1]=-l)
char *commands[PATH_MAX]={NULL}; //Pathname of the actual commands. Commands may be more than one due to piping.
char *target_cmd;
int cpid,child_err_code;
//Initialize PS1 content
init_ps1();
while(1){
printf("%s",PS1); //Display prompt(PS1)
if(!fgets(cmd,MAX_CMD_LENGTH,stdin)){ //Get input
perror("fgets");
exit(EXIT_FAILURE);
}
if(strcmp(cmd,"\n") == 0) //If Empty command then new prompt again
continue;
cmd[strlen(cmd)-1] = '\0'; //Replace '\n' with a '\0'
if(strcmp(cmd,"exit") == 0) //Exit code
exit(0);
//Tokenize the command
if(tokenize_cmd(cmd,tokens) == -1){
fprintf(stderr,"Shell Error: Too may tokens in command.\n");
continue;
}
//Extract command names
if(parse_cmd(tokens,commands) == -1){
fprintf(stderr,"Shell Error: Unable to parse command.\n");
continue;
}
target_cmd = search_cmd(commands[0]); //TODO....Modify this code for every commands
//This is the core function of a shell. Rest are features.
//Execute command by invoking the respective program for it using exec()
//TODO....
cpid = fork();
if(cpid == -1){
perror("fork");
exit(EXIT_FAILURE);
}
if(cpid == 0){ //Child process
if(execv(target_cmd,tokens) == -1){ //TODO...Extract command pathname and argument list
perror("execv");
exit(EXIT_FAILURE); //Child exits if failed
}
}
wait(&child_err_code);
}
return 0;
}
void terminal_process(void)
{
uint8_t idx_start, idx_end, c;
idx_start = 0;
while(term_in[idx_start]== ' ' || term_in[idx_start]== '\t') idx_start++;
idx_end = idx_start;
while(term_in[idx_end] != ' ' && term_in[idx_end] != '\t' && term_in[idx_end] != '\0') idx_end++;
term_in[idx_end] = '\0';
c = search_cmd(&term_in[idx_start]);
cmds[c].cmd_func(&term_in[++idx_end]);
}
functype_cmd search_cmd(const command_str *cmdlist,char *inputcmd,int *argpos)
{
int ilen = 0;
int i = 0;
int a;
// 入力されたコマンドの文字列長を数える
while(inputcmd[ilen] && (inputcmd[ilen] != ' ')) ilen++;
// 引数の先頭箇所を探す
a = ilen;
while(inputcmd[a] && (inputcmd[a] == ' ')) a++;
if(argpos) *argpos += a;
// コマンドを探す
while(cmdlist[i].func || cmdlist[i].sub)
{
printf("[%s]-[%s]\n",cmdlist[i].name,inputcmd);
if(!strncmp(cmdlist[i].name,inputcmd,ilen)) // 名前が一致？
{
if(strlen(cmdlist[i].name) == ilen) // 長さが一致？
{
lastcmd = (command_str *)cmdlist;
strncat(helphelp,inputcmd,a);
if(cmdlist[i].sub) // サブコマンドあり？
{
// strncat(helphelp,inputcmd,a);
return search_cmd(cmdlist[i].sub,&inputcmd[a],argpos);
}
return cmdlist[i].func;
}
}
i++;
}
return NULL;
}