Mirror of :pserver:cvs@cvs.fefe.de:/cvs libowfat https://www.fefe.de/libowfat/
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#define _POSIX_C_SOURCE 200809
#define _ATFILE_SOURCE
#include <sys/types.h>
#include <unistd.h>
#ifndef __MINGW32__
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#endif
#include "open.h"
#include "mmap.h"
extern const char* mmap_readat(const char* filename,size_t * filesize,int dirfd) {
#ifdef __MINGW32__
return 0;
#else
int fd=openat(dirfd,filename,O_RDONLY);
char *map;
if (fd>=0) {
register off_t o=lseek(fd,0,SEEK_END);
if (o==0 || (sizeof(off_t)!=sizeof(size_t) && o > (off_t)(size_t)-1)) { close(fd); return 0; }
*filesize=(size_t)o;
if (o>0) {
map=mmap(0,*filesize,PROT_READ,MAP_SHARED,fd,0);
if (map==(char*)-1)
map=0;
} else
map="";
close(fd);
return map;
}
return 0;
#endif
}