int taskset_main(int argc, char** argv)
{
cpu_set_t mask, new_mask;
pid_t pid = 0;
unsigned opt;
const char *state = "current\0new";
char *p_opt = NULL, *aff = NULL;
opt = getopt32(argc, argv, "+p:", &p_opt);
if (opt & OPT_p) {
if (argc == optind+1) { /* -p <aff> <pid> */
aff = p_opt;
p_opt = argv[optind];
}
argv += optind; /* me -p <arg> */
pid = xatoul_range(p_opt, 1, ULONG_MAX); /* -p <pid> */
} else
aff = *++argv; /* <aff> <cmd...> */
if (aff) {
unsigned i = 0;
unsigned long l = xstrtol_range(aff, 0, 1, LONG_MAX);
CPU_ZERO(&new_mask);
while (i < CPU_SETSIZE && l >= (1<<i)) {
if ((1<<i) & l)
CPU_SET(i, &new_mask);
++i;
}
}
if (opt & OPT_p) {
print_aff:
if (sched_getaffinity(pid, sizeof(mask), &mask) < 0)
bb_perror_msg_and_die("failed to %cet pid %d's affinity", 'g', pid);
printf("pid %d's %s affinity mask: "TASKSET_PRINTF_MASK"\n",
pid, state, from_cpuset(mask));
if (!*argv) /* no new affinity given or we did print already, done. */
return EXIT_SUCCESS;
}
if (sched_setaffinity(pid, sizeof(new_mask), &new_mask))
bb_perror_msg_and_die("failed to %cet pid %d's affinity", 's', pid);
if (opt & OPT_p) {
state += 8;
++argv;
goto print_aff;
}
++argv;
BB_EXECVP(*argv, argv);
bb_perror_msg_and_die("%s", *argv);
}
int chrt_main(int argc, char **argv)
{
pid_t pid = 0;
unsigned opt;
struct sched_param sp;
char *p_opt = NULL, *priority = NULL;
const char *state = "current\0new";
int prio = 0, policy = SCHED_RR;
opt_complementary = "r--fo:f--ro:r--fo"; /* only one policy accepted */
opt = getopt32(argv, "+mp:rfo", &p_opt);
if (opt & OPT_r)
policy = SCHED_RR;
if (opt & OPT_f)
policy = SCHED_FIFO;
if (opt & OPT_o)
policy = SCHED_OTHER;
if (opt & OPT_m) { /* print min/max */
show_min_max(SCHED_FIFO);
show_min_max(SCHED_RR);
show_min_max(SCHED_OTHER);
fflush_stdout_and_exit(EXIT_SUCCESS);
}
if (opt & OPT_p) {
if (argc == optind+1) { /* -p <priority> <pid> */
priority = p_opt;
p_opt = argv[optind];
}
argv += optind; /* me -p <arg> */
pid = xatoul_range(p_opt, 1, ULONG_MAX); /* -p <pid> */
} else {
argv += optind; /* me -p <arg> */
priority = *argv;
}
if (priority) {
/* from the manpage of sched_getscheduler:
[...] sched_priority can have a value
in the range 0 to 99.
[...] SCHED_OTHER or SCHED_BATCH must be assigned
the static priority 0. [...] SCHED_FIFO or
SCHED_RR can have a static priority in the range 1 to 99.
*/
prio = xstrtol_range(priority, 0, policy == SCHED_OTHER
? 0 : 1, 99);
}
if (opt & OPT_p) {
int pol = 0;
print_rt_info:
pol = sched_getscheduler(pid);
if (pol < 0)
bb_perror_msg_and_die("failed to %cet pid %d's policy", 'g', pid);
printf("pid %d's %s scheduling policy: %s\n",
pid, state, policies[pol].name);
if (sched_getparam(pid, &sp))
bb_perror_msg_and_die("failed to get pid %d's attributes", pid);
printf("pid %d's %s scheduling priority: %d\n",
pid, state, sp.sched_priority);
if (!*argv) /* no new prio given or we did print already, done. */
return EXIT_SUCCESS;
}
sp.sched_priority = prio;
if (sched_setscheduler(pid, policy, &sp) < 0)
bb_perror_msg_and_die("failed to %cet pid %d's policy", 's', pid);
if (opt & OPT_p) {
state += 8;
++argv;
goto print_rt_info;
}
++argv;
BB_EXECVP(*argv, argv);
bb_simple_perror_msg_and_die(*argv);
}
