add help
This commit is contained in:
parent
57dbb56c4c
commit
ae5a5b372a
@ -27,6 +27,10 @@ bool is_builtin(char *command) {
|
||||
return true;
|
||||
}
|
||||
|
||||
if (strcmp(command, "help") == 0) {
|
||||
return true;
|
||||
}
|
||||
|
||||
if (strcmp(command, "cd") == 0) {
|
||||
return true;
|
||||
}
|
||||
@ -50,6 +54,9 @@ void run_builtin(StringArray *args) {
|
||||
if (strcmp(args->array[0], "exit") == 0) {
|
||||
exit_shell(args);
|
||||
}
|
||||
else if (strcmp(args->array[0], "help") == 0) {
|
||||
help(args);
|
||||
}
|
||||
else if (strcmp(args->array[0], "cd") == 0) {
|
||||
change_directory(args);
|
||||
}
|
||||
@ -67,6 +74,21 @@ void run_builtin(StringArray *args) {
|
||||
}
|
||||
}
|
||||
|
||||
void help(StringArray *args) {
|
||||
if (args->size > 1) {
|
||||
fprintf(stderr, "Too many arguments!\n");
|
||||
return;
|
||||
}
|
||||
fprintf(stdout, "myshellin help\n");
|
||||
fprintf(stdout, "These command are defined internally in myshellin.\n\n");
|
||||
fprintf(stdout, "set $<variable> = <value> set an environment variable\n");
|
||||
fprintf(stdout, "environ show all enviornment variables\n");
|
||||
fprintf(stdout, "echo [$<variable> ...] [comment ...] print comments or variables to stdout\n");
|
||||
fprintf(stdout, "help show this help message\n");
|
||||
fprintf(stdout, "cd [dir] [$<variable>] change directory\n");
|
||||
fprintf(stdout, "exit exit the shell\n");
|
||||
}
|
||||
|
||||
void exit_shell(StringArray *args) {
|
||||
free_string_array(args);
|
||||
exit(EXIT_SUCCESS);
|
||||
|
@ -32,6 +32,12 @@ bool is_builtin(char *command);
|
||||
*/
|
||||
void run_builtin(StringArray *args);
|
||||
|
||||
/**
|
||||
* Show help message for the shell.
|
||||
* @param args The arguments passed to help.
|
||||
*/
|
||||
void help(StringArray *args);
|
||||
|
||||
/**
|
||||
* Exit the shell.
|
||||
* @param args The arguments that were used to call exit. This is used to free the memory before exit.
|
||||
|
Loading…
Reference in New Issue
Block a user