1 /* $OpenBSD: dev.c,v 1.1.1.1 2018/04/10 23:00:53 bluhm Exp $ */ 2 /* 3 * Copyright (c) 2018 Alexander Bluhm <bluhm@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <err.h> 19 #include <fcntl.h> 20 #include <stdarg.h> 21 #include <stdlib.h> 22 #include <stdio.h> 23 #include <unistd.h> 24 25 #include "header.h" 26 27 void 28 fdops(int fdpre, int fdpost) 29 { 30 char *devpre, *devpost; 31 32 if (asprintf(&devpre, "/dev/fd/%d", fdpre) == -1) 33 err(1, "asprintf fdpre"); 34 if (asprintf(&devpost, "/dev/fd/%d", fdpost) == -1) 35 err(1, "asprintf fdpost"); 36 37 if (open(devpre, O_RDONLY) == -1) 38 err(1, "open dev pre"); 39 if (open(devpost, O_RDONLY) == -1) 40 err(1, "open dev post"); 41 42 free(devpre); 43 free(devpost); 44 } 45