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#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include "dietfeatures.h"
#ifndef O_NOFOLLOW
#define O_NOFOLLOW 0
#endif
int mkstemp(char* template) {
char *tmp=template+strlen(template)-6;
int randfd;
int i,res;
unsigned int random;
if (tmp<template) goto error;
for (i=0; i<6; ++i) if (tmp[i]!='X') { error: errno=EINVAL; return -1; }
randfd=open("/dev/urandom",O_RDONLY);
for (;;) {
read(randfd,&random,sizeof(random));
for (i=0; i<6; ++i) {
int hexdigit=(random>>(i*5))&0x1f;
tmp[i]=hexdigit>9?hexdigit+'a'-10:hexdigit+'0';
}
res=open(template,O_CREAT|O_RDWR|O_EXCL|O_NOFOLLOW,0600);
if (res>=0 || errno!=EEXIST) break;
}
close(randfd);
return res;
}
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