void wait_for_fg(job *jobs) {
int status;
pid_t pid;
do {
pid = waitpid(-1, &status, WUNTRACED|WNOHANG);
if(pid>0) {
int jid = pid_to_jid(jobs, pid);
if(jid != -1) set_job_status(&jobs[jid], status);
}
} while (fg_job(jobs) >= 0);
}
/*
* builtin - When user typed a shell built in cmd, the cmd will be executed
*immediately and return a true value. Otherwise, return a 0 indicating not a
*built in cmd.
*/
int builtin(struct cmdline_tokens* tok)
{
switch(tok->builtins)
{
case BUILTIN_NONE:
return 0;
case BUILTIN_QUIT:
exit(0);
case BUILTIN_JOBS:
mylistjob(tok);
return 1;
case BUILTIN_FG:
fg_job(tok);
return 1;
case BUILTIN_BG:
bg_job(tok);
return 1;
default:
return 0;
}
}
