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#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "common.h"
#include <time.h>
#include <unistd.h>
#include <sys/types.h>
#ifndef HAVE_CONF_CAP
static uid_t procrealuid = 0;
static uid_t proceffuid = 0;
#endif
void checktimespec(struct timespec* arg){
long tominus;
if(arg->tv_nsec >= 1000000000){
arg->tv_sec += (arg->tv_nsec / 1000000000);
arg->tv_nsec %= 1000000000;
}else if(arg->tv_nsec < 0){
if((-(arg->tv_nsec)) % 1000000000 == 0){
arg->tv_sec -= ((-(arg->tv_nsec)) / 1000000000);
arg->tv_nsec = 0;
}else{
tominus = (((-(arg->tv_nsec)) / 1000000000) + 1);
arg->tv_sec -= tominus;
arg->tv_nsec += tominus * 1000000000;
}
}
}
void difftimespec(start, end, out)
const struct timespec* start;
const struct timespec* end;
struct timespec* out;
{
out->tv_sec = end->tv_sec - start->tv_sec;
out->tv_nsec = end->tv_nsec - start->tv_nsec;
if(out->tv_nsec < 0){
out->tv_nsec += 1000000000;
out->tv_sec--;
}
}
int comparetimespec(t1, t2)
const struct timespec* t1;
const struct timespec* t2;
{
if(t1->tv_sec < t2->tv_sec){
return -1;
}else if(t1->tv_sec > t2->tv_sec){
return 1;
}else{
if(t1->tv_nsec < t2->tv_nsec){
return -1;
}else if(t1->tv_nsec > t2->tv_nsec){
return 1;
}else{
return 0;
}
}
return 0;
}
#ifndef HAVE_CONF_CAP
void save_uids(void){ /* 這個一定要先執行，不然預設 uid 就是 0 */
procrealuid = getuid();
proceffuid = geteuid();
}
void disable_setuid(void){
#ifdef _POSIX_SAVED_IDS
seteuid(procrealuid);
#else
setreuid(proceffuid, procrealuid);
#endif
}
void enable_setuid(void){
#ifdef _POSIX_SAVED_IDS
seteuid(proceffuid);
#else
setreuid(procrealuid, proceffuid);
#endif
}
#endif
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