int main(int ac, char **av)
{
int lc; /* loop counter */
char *msg; /* message returned from parse_opts */
int new_val = 2;
int pid_max = get_pid_max();
/* parse standard options */
if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) {
tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
}
setup(); /* global setup */
/* The following loop checks looping state if -i option given */
for (lc = 0; TEST_LOOPING(lc); lc++) {
/* reset Tst_count in case we are looping */
Tst_count = 0;
/*
* Try to access an invalid process.
* This should give an ESRCH error.
*/
/* call the system call with the TEST() macro */
TEST(setpriority(PRIO_PROCESS, pid_max + 1, new_val));
if (TEST_RETURN == 0) {
tst_resm(TFAIL, "call failed to produce expected error "
"- errno = %d - %s", TEST_ERRNO,
strerror(TEST_ERRNO));
continue;
}
TEST_ERROR_LOG(TEST_ERRNO);
switch (TEST_ERRNO) {
case ESRCH:
tst_resm(TPASS, "expected failure - errno = %d - %s",
TEST_ERRNO, strerror(TEST_ERRNO));
break;
default:
tst_resm(TFAIL, "call failed to produce expected error "
"- errno = %d - %s", TEST_ERRNO,
strerror(TEST_ERRNO));
}
}
cleanup();
tst_exit();
}
int main(int ac, char **av)
{
int lc;
char *msg;
pid_t epid = get_pid_max() + 1;
int status = 1;
struct rusage rusage;
if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL)
tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
setup();
for (lc = 0; TEST_LOOPING(lc); lc++) {
Tst_count = 0;
TEST(wait4(epid, &status, 0, &rusage));
if (TEST_RETURN == 0) {
tst_brkm(TFAIL, cleanup,
"call failed to produce expected error - errno = %d - %s",
TEST_ERRNO, strerror(TEST_ERRNO));
}
switch (TEST_ERRNO) {
case ECHILD:
tst_resm(TPASS,
"received expected failure - errno = %d - %s",
TEST_ERRNO, strerror(TEST_ERRNO));
break;
default:
tst_brkm(TFAIL, cleanup,
"call failed to produce expected "
"error - errno = %d - %s", TEST_ERRNO,
strerror(TEST_ERRNO));
}
}
cleanup();
tst_exit();
}
int main(int ac, char **av)
{
int lc;
char *msg;
pid_t pid;
pid_t epid = get_pid_max() + 1;
int status = 1;
struct rusage *rusage = NULL;
if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) {
tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
}
setup(); /* global setup */
/* The following loop checks looping state if -i option given */
for (lc = 0; TEST_LOOPING(lc); lc++) {
/* reset Tst_count in case we are looping */
Tst_count = 0;
/*
* Allocate some space for the rusage structure.
*/
if ((rusage = (struct rusage *)malloc(sizeof(struct rusage)))
== NULL) {
tst_brkm(TBROK, cleanup, "malloc() failed");
}
pid = FORK_OR_VFORK();
if (pid == -1) {
tst_brkm(TBROK, cleanup, "fork() failed");
}
if (pid == 0) { /* this is the child */
/*
* sleep for a moment to let us do the test
*/
sleep(2);
exit(0);
} else { /* this is the parent */
/*
* call wait4 with the TEST() macro. epid is set
* to an illegal positive value. This should give
* an ECHILD error.
*/
TEST(wait4(epid, &status, 0, rusage));
}
if (TEST_RETURN == 0) {
tst_brkm(TFAIL, cleanup,
"call failed to produce expected error - errno = %d - %s",
TEST_ERRNO, strerror(TEST_ERRNO));
}
TEST_ERROR_LOG(TEST_ERRNO);
switch (TEST_ERRNO) {
case ECHILD:
tst_resm(TPASS,
"received expected failure - errno = %d - %s",
TEST_ERRNO, strerror(TEST_ERRNO));
break;
default:
tst_brkm(TFAIL, cleanup,
"call failed to produce expected "
"error - errno = %d - %s", TEST_ERRNO,
strerror(TEST_ERRNO));
}
/*
* Clean up things in case we are looping.
*/
free(rusage);
rusage = NULL;
}
cleanup();
tst_exit();
}
int main(int argc, char **argv) {
//argument variables
const char *exe = NULL;
int perclimit = 0;
int exe_ok = 0;
int pid_ok = 0;
int limit_ok = 0;
pid_t pid = 0;
int include_children = 0;
//get program name
char *p = (char*)memrchr(argv[0], (unsigned int)'/', strlen(argv[0]));
program_name = p==NULL ? argv[0] : (p+1);
//get current pid
cpulimit_pid = getpid();
//get cpu count
NCPU = get_ncpu();
//parse arguments
int next_option;
int option_index = 0;
//A string listing valid short options letters
const char* short_options = "+p:e:l:vzih";
//An array describing valid long options
const struct option long_options[] = {
{ "pid", required_argument, NULL, 'p' },
{ "exe", required_argument, NULL, 'e' },
{ "limit", required_argument, NULL, 'l' },
{ "verbose", no_argument, NULL, 'v' },
{ "lazy", no_argument, NULL, 'z' },
{ "include-children", no_argument, NULL, 'i' },
{ "help", no_argument, NULL, 'h' },
{ 0, 0, 0, 0 }
};
do {
next_option = getopt_long(argc, argv, short_options,long_options, &option_index);
switch(next_option) {
case 'p':
pid = atoi(optarg);
pid_ok = 1;
break;
case 'e':
exe = optarg;
exe_ok = 1;
break;
case 'l':
perclimit = atoi(optarg);
limit_ok = 1;
break;
case 'v':
verbose = 1;
break;
case 'z':
lazy = 1;
break;
case 'i':
include_children = 1;
break;
case 'h':
print_usage(stdout, 1);
break;
case '?':
print_usage(stderr, 1);
break;
case -1:
break;
default:
abort();
}
} while(next_option != -1);
if (pid_ok && (pid <= 1 || pid >= get_pid_max())) {
fprintf(stderr,"Error: Invalid value for argument PID\n");
print_usage(stderr, 1);
exit(1);
}
if (pid != 0) {
lazy = 1;
}
if (!limit_ok) {
fprintf(stderr,"Error: You must specify a cpu limit percentage\n");
print_usage(stderr, 1);
exit(1);
}
double limit = perclimit / 100.0;
if (limit<0 || limit >NCPU) {
fprintf(stderr,"Error: limit must be in the range 0-%d00\n", NCPU);
print_usage(stderr, 1);
exit(1);
}
int command_mode = optind < argc;
if (exe_ok + pid_ok + command_mode == 0) {
fprintf(stderr,"Error: You must specify one target process, either by name, pid, or command line\n");
print_usage(stderr, 1);
exit(1);
}
if (exe_ok + pid_ok + command_mode > 1) {
fprintf(stderr,"Error: You must specify exactly one target process, either by name, pid, or command line\n");
print_usage(stderr, 1);
exit(1);
}
//all arguments are ok!
signal(SIGINT, quit);
signal(SIGTERM, quit);
//print the number of available cpu
if (verbose) printf("%d cpu detected\n", NCPU);
if (command_mode) {
int i;
//executable file
const char *cmd = argv[optind];
//command line arguments
char **cmd_args = (char**)malloc((argc-optind + 1) * sizeof(char*));
if (cmd_args==NULL) exit(2);
for (i=0; i<argc-optind; i++) {
cmd_args[i] = argv[i+optind];
}
cmd_args[i] = NULL;
if (verbose) {
printf("Running command: '%s", cmd);
for (i=1; i<argc-optind; i++) {
printf(" %s", cmd_args[i]);
}
printf("'\n");
}
int child = fork();
if (child < 0) {
exit(EXIT_FAILURE);
}
else if (child == 0) {
//target process code
int ret = execvp(cmd, cmd_args);
//if we are here there was an error, show it
perror("Error");
exit(ret);
}
else {
//parent code
free(cmd_args);
int limiter = fork();
if (limiter < 0) {
exit(EXIT_FAILURE);
}
else if (limiter > 0) {
//parent
int status_process;
int status_limiter;
waitpid(child, &status_process, 0);
waitpid(limiter, &status_limiter, 0);
if (WIFEXITED(status_process)) {
if (verbose) printf("Process %d terminated with exit status %d\n", child, (int)WEXITSTATUS(status_process));
exit(WEXITSTATUS(status_process));
}
printf("Process %d terminated abnormally\n", child);
exit(status_process);
}
else {
//limiter code
if (verbose) printf("Limiting process %d\n",child);
limit_process(child, limit, include_children);
exit(0);
}
}
}
while(1) {
//look for the target process..or wait for it
pid_t ret = 0;
if (pid_ok) {
//search by pid
ret = find_process_by_pid(pid);
if (ret == 0) {
printf("No process found\n");
}
else if (ret < 0) {
printf("Process found but you aren't allowed to control it\n");
}
}
else {
//search by file or path name
ret = find_process_by_name(exe);
if (ret == 0) {
printf("No process found\n");
}
else if (ret < 0) {
printf("Process found but you aren't allowed to control it\n");
}
else {
pid = ret;
}
}
if (ret > 0) {
if (ret == cpulimit_pid) {
printf("Target process %d is cpulimit itself! Aborting because it makes no sense\n", ret);
exit(1);
}
printf("Process %d found\n", pid);
//control
limit_process(pid, limit, include_children);
}
if (lazy) break;
sleep(2);
};
exit(0);
}
int main(int argc, char* argv[])
{
int c, ret = -1;
char* log_file = NULL;
char* cpu_mask = NULL;
int rc, mode = 0, tid;
while ((c = getopt(argc, argv, "c:l:m:")) != -1) {
switch(c) {
case 'l' :
log_file = strdup(optarg);
break;
case 'c' :
cpu_mask = strdup(optarg);
break;
case 'm' :
if (strcmp(optarg, "1") == 0)
mode = 1;
else if (strcmp(optarg, "2") == 0)
mode = 2;
else if (strcmp(optarg, "3") == 0)
mode = 3;
break;
default :
fprintf(stderr, "unknown option %c\n", c);
exit(-1);
}
}
/*
* checking an dealing with input parameters
*/
if (log_file) {
if (!(f = fopen(log_file, "w"))) {
fprintf(stderr, "cannot open file\n");
goto out;
}
}
else {
f = stdout;
}
if (!mode) {
ERROR("must specify mode\n");
goto out;
}
if (!cpu_mask) {
ERROR("need to specify CPU type\n");
goto out;
}
/*
* setting up system stuff
*/
if ((pid_max = get_pid_max()) < 0) {
ERROR("unable to get pid_max\n");
goto out;
}
PRINTF("pid_max is %d\n", pid_max);
signal(SIGINT, sig_int_cb);
if ((nl_sd = create_nl_socket(NETLINK_GENERIC)) < 0) {
ERROR("error creating Netlink socket\n");
goto out;
}
/*
* register taskstats notifier
*/
fam_id = __get_family_id(nl_sd);
if (!fam_id) {
ERROR("Error getting family id, errno %d\n", errno);
goto out;
}
my_pid = getpid();
if ((rc = send_cmd(TASKSTATS_CMD_GET,
TASKSTATS_CMD_ATTR_REGISTER_CPUMASK, cpu_mask, strlen(cpu_mask))) < 0) {
ERROR("error sending register cpumask\n");
goto out;
}
/*
* now for the main loop
* modes of operations
* i) get all process stats and print
* ii) wait until receive signal (be polling for dead process in meantime)
* then get all process stats
* iii) get all process stats, then wait for signal and print diff
*/
if (mode == 1) {
fill_infos(infos1);
for (tid = 0; tid < pid_max; tid++) {
if (!infos1[tid])
continue;
print_taskstats(&infos1[tid]->t);
}
}
else if (mode == 2) {
PRINTF("waiting for signal\n");
while (!sig_int)
sleep(1);
fill_infos(infos1);
for (tid = 0; tid < pid_max; tid++) {
if (!infos1[tid])
continue;
print_taskstats(&infos1[tid]->t);
}
}
else if (mode == 3) {
struct timeval start_since_epoch;
struct timespec start, end;
static struct taskstats ts_tot = {0};
if (fill_infos(infos1) < 0) {
ERROR("error before start\n");
goto out;
}
if (clock_gettime(CLOCK_MONOTONIC, &start) < 0) {
ERROR("unable to get start time\n");
goto out;
}
if (gettimeofday(&start_since_epoch, NULL)) {
ERROR("unable to get start time since epoch\n");
goto out;
}
PRINTF("waiting for signal\n");
while (!sig_int) {
ret = recv_taskstats(MSG_DONTWAIT, infos2);
if (ret == 0 || ret == -EAGAIN) {
usleep(10000);
continue;
}
ERROR("unable to recv taskstats, %d\n", ret);
goto out;
}
if (fill_infos(infos2) < 0) {
ERROR("error at end\n");
goto out;
}
if (clock_gettime(CLOCK_MONOTONIC, &end) < 0) {
ERROR("unable to get end time\n");
goto out;
}
PRINTF("--- task dump start ---\n");
for (tid = 0; tid < pid_max; tid++) {
struct proc_info* p1 = infos1[tid];
struct proc_info* p2 = infos2[tid];
if (!(p1 || p2))
continue;
else if (p1 && p2) {
static struct taskstats ts;
diff_taskstats(&ts, &p2->t, &p1->t);
print_taskstats(&ts);
}
else if (p2) {
print_taskstats(&p2->t);
}
}
PRINTF("--- task dump end ---\n");
PRINTF("Start since epoch (s) %d\n", start_since_epoch.tv_sec);
PRINTF("Elapsed time (ns) %llu\n",
((long long)end.tv_sec - start.tv_sec) * 1000000000LL +
end.tv_nsec - start.tv_nsec);
}
out :
if (f != stdout)
fclose(f);
return ret;
}