int main(int argc, const char* argv[] ) {
fmount();
if (strcmp(argv[0], "help") == 0)
help();
else if (strcmp(argv[0], "structure") == 0)
if (mounted)
structure();
else
printf("You must mount a floppy first.\n");
else if(strcmp(argv[0], "showsector") == 0)
if (mounted)
showsector(argv);
else
printf("You must mount a floppy first.\n");
else if(strcmp(argv[0], "traverse") == 0)
if (mounted)
traverse(argc, argv);
else
printf("You must mount a floppy first.\n");
else if(strcmp(argv[0], "showfat") == 0)
if (mounted)
showfat();
else
printf("You must mount a floppy first.\n");
else if(strcmp(argv[0], "showfile") == 0)
if (mounted)
showfile(argv);
else
printf("You must mount a floppy first.\n");
else if (strcmp(argv[0], "quit") == 0)
return 0;
else {
printf("%s command not supported.\n", argv[0]);
return -1;
}
//if (fork() == 0)
//printf("Other command needed");
//TODO OTHER COMMANDS: FORK EXEC INTO THEM OR RETURN ERROR MESSAGE
return 1;
}
int main(void)
{
// Create Floppy element
floppy newfloppy;
floppy *myfloppy = &newfloppy;
unsigned short mounted = 0;
while(1)
{
char current_directory[150] = "/";
// Create a buffer and take input from the command line
char *buff = NULL;
buff = takeinfo("prompt: ");
// Create a String array and parse the buff into it
char **buff_parsed;
buff_parsed = string_array(buff);
int n_words = count_words(buff);
printf("n_words %i\n", n_words);//debug
// If an empty command line is entered
if(n_words < 1)
{
continue;
}
//-----------------------------------------------------------------------------------------
// Run the comands.
// Check to see if the comand is quit
if(!strcmp(buff_parsed[0], "quit"))
{
exit(1);
}
else if(!strcmp(buff_parsed[0], "help"))
{
help();
}
// Execute comands
else if(!strcmp(buff_parsed[0], "clear"))
{
if(fork() == 0)
{
char *args[2] = { "clear", NULL};
execv("/usr/bin/clear", args);
exit(1);
}
else
{
wait(NULL);
}
}
else if(!strcmp(buff_parsed[0], "fmount"))
{
char temp[strlen(buff_parsed[1]) + 2];
memcpy(temp,"./", 2);
memcpy(temp, buff_parsed[1], strlen(buff_parsed[1]));
if( access( buff_parsed[1], F_OK ) != -1 )
{
fprintf(stderr,"Floppy succesfully mounted\n");
mount(myfloppy, buff_parsed[1]);
mounted = 1;
}
else
{
//file doesn't exist
fprintf(stderr,"File/Floppy can't be found\n");
}
}
else if(!strcmp(buff_parsed[0], "fumount"))
{
if(mounted == 0)
printf("There's nothing to unmount\n");
else
{
mounted = 0;
myfloppy = NULL;
fprintf(stderr,"Unmount succesfull\n");
}
}
else if(!strcmp(buff_parsed[0], "traverse"))
{
if(n_words > 1)
{ // if the -l flag is used print with additional info
if(!strcmp(buff_parsed[1], "-l"))
{
traverse(myfloppy, 19, 1, current_directory);
}
else
fprintf(stderr, "flag doesn't exist");
}else
{
traverse(myfloppy, 19, 0, current_directory);
}
}
else if(!strcmp(buff_parsed[0], "structure"))
{
structure(myfloppy);
}
else if(!strcmp(buff_parsed[0], "showfat"))
{
showfat(myfloppy);
}
else
{
fprintf(stderr,"This command doesn't exist\n");
}
}
}
//BEGIN MAIN
int main (int argc, char *arg[]) {
char *userInput; //what the user types in
size_t buffer = 128; //sets buffer for getline()
char **tokens; //array of pointers to tokens of command typed
int numTokens; //the number of tokens in input command
tokens = (char **)malloc(sizeof(char *) * 128); //mallocs tokens with a max number of 128
//----------------------------------------------------------------------------------------------
//BEGIN PROGRAM WHILE LOOP
while(1) {
printf("COMMAND> "); //print prompt to user
userInput = (char *)malloc(sizeof(char) * 128); //malloc for userInput before tokenizing
getline(&userInput, &buffer, stdin);// get user input
userInput[strcspn(userInput, "\n")] = '\0'; //removes null character from end of user input
//---Tokenize the user input
char *point;
int count;
for(count = 0, point = strtok(userInput, " "); point != NULL; count++, point = strtok(NULL, " ")) {
tokens[count] = (char *)malloc(strlen(point) + 1);
strcpy(tokens[count], point);
} //END tokenizing loop
numTokens = count; //sets the number of token var equal to the number of actual tokens
//---Check for output redirection and handle output if so
int outputFile, consoleOutput;
fflush(stdout); //clear stdout as a precaution
int i; //counter for output redirection loop
for(i = 0; i < numTokens; i++) {
if(strcmp(tokens[i], ">") == 0) {
//Output redirection
outputFile = open(tokens[i+1], O_WRONLY | O_CREAT | O_TRUNC, 0644);
consoleOutput = dup(STDOUT_FILENO); //Copy original STDOUT
if(outputFile) {
dup2(outputFile, STDOUT_FILENO);
close(outputFile);
}
break; //break out of output redirection loop
}
} //END output redirection for loop
//---QUIT COMMAND - quit the program
if(strcmp(tokens[0], "quit") == 0) {
break;
}//END QUIT COMMAND
//---HELP COMMAND - print the help menu
else if(strcmp(tokens[0], "help") == 0) {
printf("\nWelcome to the floppy program!\n");
printf("Here is a list of commands supported...\n");
printf("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");
printf("help - prints the help menu (You just did this!)\n");
printf(" usage: help\n");
printf("~\n");
printf("fmount - mounts a floppy image\n");
printf(" usage: fmount [floppyname]\n");
printf("~\n");
printf("fumount - unmounts the mounted floppy image\n");
printf(" usage: fumount\n");
printf("~\n");
printf("structure - lists the stucture of the floppy\n");
printf(" usage: structure\n");
printf("~\n");
printf("traverse - lists the content in the root directory\n");
printf(" usage: traverse\n");
printf("~\n");
printf("traverse -l - with the -l flag, the traverse command outputs more detailed info\n");
printf(" usage: traverse -l\n");
printf("~\n");
printf("showsector - show the content (in a hex dump) of the provided sector number\n");
printf(" usage: showsector [sectornumber]\n");
printf("~\n");
printf("showfat - show the content of the FAT table (in a hex dump)\n");
printf(" usage: showfat\n");
printf("~\n");
printf(">>>THIS PROGRAM SUPPORTS OUTPUT REDIRECTION<<<\n");
printf("\n");
}//END HELP COMMAND
//---FMOUNT COMMAND - mounts the floppy
else if(strcmp(tokens[0], "fmount") == 0) {
int mounted;
if(numTokens < 2) {
printf("ERROR: INCORRECT USAGE - see help menu\n");
continue;
}
else {
mount(tokens[1]);
mounted = checkMount();
if(mounted < 0) {
printf("ERROR: COULD NOT MOUNT FLOPPY\n");
}
else {
printf("%s is mounted!\n", tokens[1]);
}
}
} //END FMOUNT COMMAND
//---FUMOUNT FUNCTION - unmounts the floppy
else if(strcmp(tokens[0], "fumount") == 0) {
int mounted;
mounted = checkMount();
if(mounted < 0) {
printf("ERROR: THERE IS NO MOUNTED FLOPPY\n");
continue;
}
else {
unmount();
printf("You have unmounted the floppy...\n");
}
}//END FUMOUNT COMMAND
//---STRUCTURE COMMAND - displays the structure of the floppy
else if(strcmp(tokens[0], "structure") == 0) {
int mounted;
mounted = checkMount();
if(mounted < 0) {
printf("ERROR: THERE IS NO MOUNTED FLOPPY\n");
continue;
}
else {
structure();
}
}//END STRUCTURE COMMAND
//---TRAVERSE AND TRAVERSE -L COMMANDS
else if(strcmp(tokens[0], "traverse") == 0) {
int mounted;
mounted = checkMount();
if(mounted < 0) {
printf("ERROR: THERE IS NO MOUNTED FLOPPY\n");
continue;
}
else if(strcmp(tokens[1], "-l") == 0) {
traverse(1);
}
else {
traverse(0);
}
} //END TRAVERSE AND TRAVERSE -L COMMANDS
//---SHOWSECTOR COMMAND
else if(strcmp(tokens[0], "showsector") == 0) {
int mounted;
mounted = checkMount();
if(mounted < 0) {
printf("ERROR: THERE IS NO MOUNTED FLOPPY\n");
continue;
}
else if(numTokens < 2) {
printf("ERROR: INCORRECT USAGE - see help menu\n");
continue;
}
else {
int sectorNumber = atoi(tokens[1]);
showsector(sectorNumber);
}
} //END SHOWSECTOR COMMAND
//---SHOWFAT COMMAND
else if(strcmp(tokens[0], "showfat") == 0) {
int mounted;
mounted = checkMount();
if(mounted < 0) {
printf("ERROR: THERE IS NO MOUNTED FLOPPY\n");
continue;
}
else {
showfat();
}
} //END SHOWFAT COMMAND
//---Put output back to default (the console) (in case output redirection was used)
fflush(stdout); //clear stdout as a precaution
if(consoleOutput) {
dup2(consoleOutput, STDOUT_FILENO);
close(consoleOutput);
} //END reset the output to console
//---Free up userInput and tokens[]
free(userInput);
int j;
for (j = 0; j < numTokens; j++) {
free(tokens[j]);
}//END freeing of userInput and tokens[]
} //END PROGRAM WHILE LOOP
return 1; //RETURN VALUE FOR main()
} //END MAIN