/*
* do_bgfg - Execute the builtin bg and fg commands
*/
void do_bgfg(char **argv)
{
if (argv[1] == NULL) {
printf("%s command requires PID or %%jobid argument\n", argv[0]);
return;
}
if (!isdigit(argv[1][0]) && argv[1][0] != '%') {
printf("%s: argument must be a PID or %%jobid\n", argv[0]);
return;
}
if (argv[1][0] == '%' ? 1 : 0) {
if (getjobjid(jobs, atoi(&argv[1][1])) == NULL) {
printf("%s: No such job\n", argv[1]);
return;
}
} else {
if (getjobjid(jobs, atoi(&argv[1][1])) == NULL) {
printf("(%d): No such process\n", atoi(argv[1]));
return;
}
}
// This is my favourite code
__kill(-getjobjid(jobs, atoi(&argv[1][1]))->pid, SIGCONT);
getjobjid(jobs, atoi(&argv[1][1]))->state = strcmp(argv[0], "fg")==0?FG:BG;
if (strcmp(argv[0], "fg")==0) waitfg(getjobjid(jobs, atoi(&argv[1][1]))->pid); else printf("[%d] (%d) %s", getjobjid(jobs, atoi(&argv[1][1]))->jid, getjobjid(jobs, atoi(&argv[1][1]))->pid, getjobjid(jobs, atoi(&argv[1][1]))->cmdline);
}
static void segfault(int code, unsigned long error, void *addr)
{
kprintf("Segmentation fault: %s mode %s at 0x%p%s\n",
(error & PGF_USER) ? "user" : "kernel",
(error & PGF_WRITE) ? "write" : "read",
addr,
(error & PGF_PERM) ? "" : " (page not present)");
dump_context(current->esp);
if (is_kernel_context(current->esp))
panic("Segfault in kernel");
__kill(current, SIGSEGV, code);
}
void
__pthread_abort(void)
{
PTHREAD_NORETURN void (*_libc_abort)(void);
_libc_abort = dlsym(RTLD_DEFAULT, "abort");
if (_libc_abort) {
_libc_abort();
} else {
__kill(__getpid(), __SIGABRT, 0);
}
}
void exn_ill_instr(void)
{
kprintf("Illegal instruction\n");
__kill(current, SIGILL, ILL_ILLOPC); // FIXME: determine correct code
}
void exn_fpe(void)
{
kprintf("Arithmetic error\n");
__kill(current, SIGFPE, FPE_INTDIV); // TODO: more codes
}
/* Raise the signal SIG. */
int
raise (int sig)
{
return __kill (__getpid (), sig);
}
