static double get_create_time(pid_t pid) {
FILE *fp = NULL;
char procfile[50];
char s_pid[10];
char *tmp;
double ct_jiffies;
double ct_seconds;
double clock_ticks = sysconf(_SC_CLK_TCK);
long boot_time = get_boot_time();
sprintf(s_pid, "%d", pid);
sprintf(procfile, "/proc/%d/stat", pid);
fp = fopen(procfile, "r");
check(fp, "Couldn't open process stat file");
tmp = grep_awk(fp, s_pid, 21, " ");
ct_jiffies = atof(tmp);
free(tmp);
fclose(fp);
ct_seconds = boot_time + (ct_jiffies / clock_ticks);
return ct_seconds;
error:
if (fp)
fclose(fp);
return -1;
}
static pid_t get_ppid(pid_t pid) {
FILE *fp = NULL;
pid_t ppid = -1;
char *tmp;
char procfile[50];
sprintf(procfile, "/proc/%d/status", pid);
fp = fopen(procfile, "r");
check(fp, "Couldn't open process status file");
tmp = grep_awk(fp, "PPid", 1, ":");
ppid = tmp ? atoi(tmp) : -1;
check(ppid != -1, "Couldnt' find PPid in process status file");
fclose(fp);
free(tmp);
return ppid;
error:
if (fp)
fclose(fp);
return -1;
}
static unsigned int
get_ppid(unsigned pid)
{
FILE *fp = NULL;
unsigned int ppid = -1;
char *tmp;
char procfile[50];
sprintf(procfile,"/proc/%d/status", pid);
fp = fopen(procfile,"r");
check(fp, "Couldn't open process status file");
tmp = grep_awk(fp, "PPid", 1, ":");
ppid = tmp?strtoul(tmp, NULL, 10):-1;
check(ppid != -1, "Couldnt' find Ppid in process status file");
fclose(fp);
free(tmp);
return ppid;
error:
if (fp) fclose(fp);
return -1;
}
