bool proc_stat(pid_t pid, proc *pptr)
{
unsigned long long start_jiffies;
char path[40], buffer[1024], *start;
int stat_fd, num;
snprintf(path, sizeof (path), "/proc/%d/stat", pid);
stat_fd = open(path, O_RDONLY);
if (stat_fd < 0) return false;
num = read(stat_fd, buffer, sizeof (buffer)-1);
close(stat_fd);
if (num < 0) return false;
buffer[num] = '\0';
start = strrchr(buffer, ')')+2;
if (start == NULL) return false;
num = sscanf(start,
"%c " // state
"%d %*d %*d %*d %*d " // ppid
"%*u %*lu %*lu %*lu %*lu " // flags
"%lu %*lu %*ld %*ld " // utime
"%*ld %*ld %*ld %*ld " // priority
"%llu", // starttime
&(pptr->state),
&(pptr->ppid),
&(pptr->utime),
&start_jiffies);
if (num != 4) return false;
pptr->utime = jiffy_to_sec(pptr->utime);
pptr->start_time = boot_time() + jiffy_to_sec(start_jiffies);
return true;
}
/* Init kmsg input */
int in_kmsg_init(struct flb_config *config)
{
int fd;
int ret;
struct flb_in_kmsg_config *ctx;
ctx = calloc(1, sizeof(struct flb_in_kmsg_config));
if (!ctx) {
perror("calloc");
return -1;
}
/* open device */
fd = open(FLB_KMSG_DEV, O_RDONLY);
if (fd == -1) {
perror("open");
flb_utils_error_c("Could not open kernel log buffer on kmsg plugin");
}
ctx->fd = fd;
/* get the system boot time */
ret = boot_time(&ctx->boot_time);
if (ret == -1) {
flb_utils_error_c("Could not get system boot time for kmsg input plugin");
}
/* set context */
ret = flb_input_set_context("kmsg", ctx, config);
if (ret == -1) {
flb_utils_error_c("Could not set configuration for kmsg input plugin");
}
/* Set our collector based on a file descriptor event */
ret = flb_input_set_collector_event("kmsg",
in_kmsg_collect,
ctx->fd,
config);
if (ret == -1) {
flb_utils_error_c("Could not set collector for kmsg input plugin");
}
return 0;
}
