/*
* eval helper function
* This function can handle the built-in commands (quit, jobs, bg, fg, kill)
* If it is not a built-in command, it will return 0. Otherwise, it will
* return 1. There are some smaller helper functions used to handle each
* built-in command. For example, dobg(), dofg() and so on.
*/
int builtinCommand(struct cmdline_tokens tok)
{
if (!strcmp(tok.argv[0], "quit")) {
exit(0);
}
if (!strcmp(tok.argv[0], "jobs")) {
listjobs(job_list, getfd(OUT, tok.outfile));
return 1;
}
if (!strcmp(tok.argv[0], "bg")) {
dobg(tok.argv);
return 1;
}
if (!strcmp(tok.argv[0], "fg")) {
dofg(tok.argv);
return 1;
}
if (!strcmp(tok.argv[0], "kill")) {
dokill(tok.argv);
return 1;
}
if (!strcmp(tok.argv[0], "&")) {
return 1;
}
return 0;
}
/*this is the main routine*/
void doshell()
{
char line[80];
/*run forever - the shell shouldn't end*/
while(1==1)
{
/*read in a line*/
printstring("SHELL>\0");
readstring(line);
/*match it against each possible command*/
/*if the user presses return, ignore it*/
if (line[0]==0xd)
continue;
else if (iscommand(line,"CLS\0")==1)
doclear();
else if (iscommand(line,"cls\0")==1)
doclear();
else if (iscommand(line,"COPY\0")==1)
docopy();
else if (iscommand(line,"copy\0")==1)
docopy();
else if (iscommand(line,"CREATE \0")==1)
docreate(line);
else if (iscommand(line,"create \0")==1)
docreate(line);
else if (iscommand(line,"DELETE \0")==1)
dodelete(line);
else if (iscommand(line,"delete \0")==1)
dodelete(line);
else if (iscommand(line,"DIR\0")==1)
dodir();
else if (iscommand(line,"dir\0")==1)
dodir();
else if (iscommand(line,"EXEC \0")==1)
doexecute(line,1);
else if (iscommand(line,"exec \0")==1)
doexecute(line,1);
else if (iscommand(line,"EXECBACK \0")==1)
doexecute(line,0);
else if (iscommand(line,"execback \0")==1)
doexecute(line,0);
else if (iscommand(line,"HELP\0")==1)
dohelp();
else if (iscommand(line,"help\0")==1)
dohelp();
else if (line[0]=='?')
dohelp();
else if (iscommand(line,"TYPE \0")==1)
dotype(line);
else if (iscommand(line,"type \0")==1)
dotype(line);
else if (iscommand(line,"KILL \0")==1)
dokill(line);
else if (iscommand(line,"kill \0")==1)
dokill(line);
else if (iscommand(line,"mkdir \0")==1)
domkdir(line);
else if (iscommand(line,"MKDIR\0")==1)
domkdir(line);
else if (iscommand(line,"FORMAT\0")==1)
doFormat();
else if (iscommand(line,"format\0")==1)
doFormat();
else if (iscommand(line,"remove\0")==1)
doRemove(line);
else if (iscommand(line,"REMOVE\0")==1)
doRemove(line);
else if (iscommand(line,"list\0")==1)
doList();
else if (iscommand(line,"LIST\0")==1)
doList();
else if (iscommand(line,"count\0")==1)
doCount(line);
else if (iscommand(line,"WRITE\0")==1)
doCreateFile(line);
else if (iscommand(line,"write\0")==1)
doCreateFile(line);
else if (iscommand(line,"READ\0")==1)
doEcho(line);
else if (iscommand(line,"read\0")==1)
doEcho(line);
else
printstring("Command not found\r\n\0");
printstring("\r\n\0");
}
}