/* add another UPS for monitoring from ups.conf */
static void ups_create(const char *fn, const char *name, const char *desc)
{
upstype_t *temp;
for (temp = firstups; temp != NULL; temp = temp->next) {
if (!strcasecmp(temp->name, name)) {
upslogx(LOG_ERR, "UPS name [%s] is already in use!", name);
return;
}
}
/* grab some memory and add the info */
temp = xcalloc(1, sizeof(*temp));
temp->fn = xstrdup(fn);
temp->name = xstrdup(name);
if (desc) {
temp->desc = xstrdup(desc);
}
temp->stale = 1;
temp->retain = 1;
temp->sock_fd = sstate_connect(temp);
/* preload this to the current time to avoid false staleness */
clock_monotonic(&temp->last_heard);
temp->next = firstups;
firstups = temp;
num_ups++;
}
static int
measured_exec(const char *device, char *const *args)
{
struct disk_stats stats0;
struct disk_stats stats1;
char stat_path[PATH_MAX];
uint64_t time0;
uint64_t time1;
uint32_t bytes;
uint32_t milli_io;
float milli_tot;
float seconds;
int status;
pid_t pid;
uint16_t sector_sz;
if (find_device_stat(device, stat_path) == -1)
return -1;
if ((sector_sz = sector_size(device)) == -1) {
fprintf(stderr, "%s: failed to determine sector size: %s\n",
prog, strerror(errno));
return -1;
}
if (drop_cache() == -1)
return -1;
/* collect opening data */
if (read_disk_stats(prog, stat_path, &stats0) == -1)
return -1;
time0 = clock_monotonic();
/* start child */
if ((pid = fork()) == -1) {
fprintf(stderr, "%s: fork failed: %s\n",
prog, strerror(errno));
return -1;
} else if (!pid) {
execvp(*args, args);
fprintf(stderr, "%s: exec failed: %s\n",
prog, strerror(errno));
exit(0xff);
}
/* wait for child */
status = 0;
for (;;) {
if (waitpid(pid, &status, 0) == -1) {
if (errno == EINTR) continue;
fprintf(stderr, "%s: wait failed: %s\n",
prog, strerror(errno));
return -1;
}
break;
}
/* collect closing data */
if (read_disk_stats(prog, stat_path, &stats1) == -1)
return -1;
time1 = clock_monotonic();
/* check for child error */
if (WIFSIGNALED(status)) {
fprintf(stderr, "%s: child terminated by signal %s\n",
prog, signame(WTERMSIG(status)));
return -1;
} else if (WEXITSTATUS(status)) {
if (WEXITSTATUS(status) != 0xff)
fprintf(stderr, "%s: child exited with %d\n",
prog, WEXITSTATUS(status));
return -1;
}
/* process data */
bytes = ((stats1.sectors_read + stats1.sectors_written) -
(stats0.sectors_read + stats0.sectors_written)) * sector_sz;
milli_io = stats1.milli_io - stats0.milli_io;
milli_tot = (time1 - time0) / 1000000.0f;
seconds = (time1 - time0) / 1000000000.0f;
/* print data */
printf("RATE_KBPS\t%.10e\n", bytes / (seconds * 1024));
printf("RATE_MBPS\t%.10e\n", bytes / (seconds * 1048576));
printf("TIME_S\t\t%.10e\n", seconds);
printf("UTIL\t\t%.10e\n", milli_io / milli_tot);
return 0;
}
