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#ifdef HAVE_CONFIG_H
# include "SctConfig.h"
#endif
#include "SctCommon.h"
#include <time.h>
#include <errno.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <pthread.h>
uid_t procrealuid = 0;
uid_t proceffuid = 0;
int str_to_u(const char* s, unsigned* u){
char* p;
unsigned o;
errno = 0;
o = strtoul(s, &p, 0);
if(errno || *p){
return -1;
}
*u = o;
return 0;
}
int read_complete(int fd, void* buf, size_t count){
/* 一定要讀到 count 位元組的資料才會回傳，所以只要回傳 < count
* 就表示已經讀到 EOF 了 */
char* bufp = (char*)buf;
size_t curcount = 0;
int rval;
do{
rval = read(fd, bufp, count - curcount);
if(rval < 0){
return rval;
}else if(rval == 0){
return curcount;
}else{
bufp += rval;
curcount += rval;
}
}while(curcount < count);
return count;
}
int strerror_threadsafe(int errnum, char* buf, size_t buflen){
static pthread_mutex_t strerror_call_mutex = PTHREAD_MUTEX_INITIALIZER;
char* rval;
int rlen;
pthread_mutex_lock(&strerror_call_mutex);
rval = strerror(errnum);
rlen = strlen(rval);
if(buflen < rlen){
pthread_mutex_unlock(&strerror_call_mutex );
return -1;
}
strcpy(buf, rval);
pthread_mutex_unlock(&strerror_call_mutex);
return 0;
}
int sprintf_malloc(char** strstore, const char* format, ...){
int len;
char* newstr;
va_list ap;
va_start(ap, format);
len = vsnprintf(NULL, 0, format, ap) + 1;
va_end(ap);
newstr = malloc(len);
if(newstr == NULL){
return -1;
}
va_start(ap, format);
len = vsnprintf(newstr, len, format, ap);
va_end(ap);
*strstore = newstr;
return len;
}
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;
}
void save_uids(void){ /* 這個一定要先執行，不然預設 uid 就是 0 */
procrealuid = getuid();
proceffuid = geteuid();
}
#ifndef HAVE_CONF_CAP
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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