1 /* 2 * dhcpcd - DHCP client daemon 3 * Copyright (c) 2006-2014 Roy Marples <roy (at) marples.name> 4 * All rights reserved 5 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <stdlib.h> 29 #include <stdio.h> 30 #include <stdarg.h> 31 #include <unistd.h> 32 33 #include "dprintf.h" 34 35 int 36 vdprintf(int fd, const char * __restrict fmt, va_list va) 37 { 38 int e; 39 FILE *fp; 40 41 if ((e = dup(fd)) == -1) 42 return -1; 43 44 if ((fp = fdopen(e, "r+")) == NULL) { 45 close(e); 46 return -1; 47 } 48 49 e = vfprintf(fp, fmt, va); 50 fclose(fp); 51 return e; 52 } 53 54 int 55 dprintf(int fd, const char * __restrict fmt, ...) 56 { 57 int e; 58 va_list va; 59 60 va_start(va, fmt); 61 e = vdprintf(fd, fmt, va); 62 va_end(va); 63 return e; 64 } 65 66
