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#include "fd.h"
#include <fcntl.h>
/**
@file fd.c
@autor djb
@source qmail
@brief file descriptor manipulation
*/
int close(int __fd); /* we won't use unistd.h here */
int fd_copy(int to, int from)
{
if (to == from) return 0;
if (fcntl(from, F_GETFL, 0) == -1) return -1;
close(to);
if (fcntl(from, F_DUPFD, to) == -1) return -1;
return 0;
}
int fd_move(int to, int from)
{
if (to == from) return 0;
if (fd_copy(to, from) == -1) return -1;
close(from);
return 0;
}
int fd_coe(int fd)
{
return fcntl(fd, F_SETFD, 1);
}
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