/* do_fg - Execute the builtin fg command */
void
do_fg(char **argv)
{
struct job_t * job;
pid_t pid;
if (verbose)
printf("do_fg: entering\n");
job = treat_argv(argv);
job->jb_state = FG;
pid = jobs_fgpid();
assert(kill(-pid, SIGCONT) != -1);
if (verbose)
printf("do_fg: sigcont %d \n", pid);
waitfg(pid);
if (verbose)
printf("do_fg: exiting\n");
return;
}
/* do_bg - Execute the builtin bg command */
void do_bg(char **argv) {
struct job_t *job;
int k;
if (verbose) {
printf("Entering BG\n");
}
job = treat_argv(argv);
if (job == NULL) {
if (verbose) {
printf("Non existing job : exiting waitfg\n");
}
return;
}
job->jb_state = BG;
k = kill(job->jb_pid,SIGCONT);
if (k <0) {
unix_error("kill error");
}
if (verbose) {
printf("Exiting BG\n");
}
return;
}
/* do_kill - Execute the builtin kill command */
void do_kill(char **argv) {
struct job_t *job;
int k;
if (verbose) {
printf("Entering kill\n");
}
job = treat_argv(argv);
if (job == NULL) {
if (verbose) {
printf("Non existing job : exiting kill\n");
}
return;
}
k= kill(job->jb_pid,SIGKILL);
if (k <0) {
unix_error("kill error");
}
if (verbose) {
printf("Exiting kill\n");
}
return;
}
/* do_stop - Execute the builtin stop command */
void do_stop(char **argv) {
struct job_t *job;
int k;
if (verbose) {
printf("Entering stop\n");
}
job = treat_argv(argv);
if (job == NULL) {
if(verbose) {
printf("Non existing job : exiting stop\n");
return;
}
}
job->jb_state = ST;
k = kill(job->jb_pid,SIGSTOP);
if (k <0) {
unix_error("kill error");
}
if (verbose) {
printf("Exiting stop \n");
}
return;
}
/* do_kill - Execute the builtin kill command */
void
do_kill(char **argv)
{
struct job_t * job;
pid_t pid;
if (verbose)
printf("do_kill: entering\n");
job = treat_argv(argv);
pid = job->jb_pid;
assert(kill(-pid, SIGKILL) != -1);
if (verbose)
printf("do_kill: sigkill %d \n", pid);
assert(jobs_deletejob(pid) != -1);
if (verbose)
printf("do_stop: exiting\n");
return;
}
/* do_stop - Execute the builtin stop command */
void
do_stop(char **argv)
{
struct job_t * job;
pid_t pid;
if (verbose)
printf("do_stop: entering\n");
job = treat_argv(argv);
job->jb_state = ST;
pid = job->jb_pid;
assert(kill(-pid, SIGSTOP) != -1);
if (verbose)
printf("do_stop: sigstop %d \n", pid);
if (verbose)
printf("do_stop: exiting\n");
return;
}