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#include "seek.h"
#include <sys/types.h>
/**
@file seek.c
@author djb
@ref qmail
@brief seek in an open file descritor
*/
off_t lseek(int fd, off_t offset, int whence);
int ftruncate(int fd, off_t length);
#define CUR 1 /* sigh */
seek_pos seek_cur(int fd)
{
return lseek(fd, (off_t)0, CUR);
}
#define END 2 /* sigh */
int seek_end(int fd)
{
if (lseek(fd, (off_t)0, END) == -1) return -1;
return 0;
}
#define SET 0 /* sigh */
int seek_set(int fd, seek_pos pos)
{
if (lseek(fd, (off_t)pos, SET) == -1) return -1;
return 0;
}
int seek_trunc(int fd, seek_pos pos)
{
return ftruncate(fd, (off_t)pos);
}
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