1 /*
2 * dhcpcd - DHCP client daemon
3 * Copyright (c) 2006-2014 Roy Marples <roy@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
vdprintf(int fd,const char * __restrict fmt,va_list va)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
dprintf(int fd,const char * __restrict fmt,...)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