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compat/dprintf.c
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/* | |||||
* dhcpcd - DHCP client daemon | |||||
* Copyright (c) 2006-2017 Roy Marples <roy@marples.name> | |||||
* All rights reserved | |||||
* Redistribution and use in source and binary forms, with or without | |||||
* modification, are permitted provided that the following conditions | |||||
* are met: | |||||
* 1. Redistributions of source code must retain the above copyright | |||||
* notice, this list of conditions and the following disclaimer. | |||||
* 2. Redistributions in binary form must reproduce the above copyright | |||||
* notice, this list of conditions and the following disclaimer in the | |||||
* documentation and/or other materials provided with the distribution. | |||||
* | |||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||||
* SUCH DAMAGE. | |||||
*/ | |||||
#include <stdlib.h> | |||||
#include <stdio.h> | |||||
#include <stdarg.h> | |||||
#include <unistd.h> | |||||
#include "dprintf.h" | |||||
int | |||||
vdprintf(int fd, const char * __restrict fmt, va_list va) | |||||
{ | |||||
int e; | |||||
FILE *fp; | |||||
if ((e = dup(fd)) == -1) | |||||
return -1; | |||||
if ((fp = fdopen(e, "a")) == NULL) { | |||||
close(e); | |||||
return -1; | |||||
} | |||||
e = vfprintf(fp, fmt, va); | |||||
fclose(fp); | |||||
return e; | |||||
} | |||||
int | |||||
dprintf(int fd, const char * __restrict fmt, ...) | |||||
{ | |||||
int e; | |||||
va_list va; | |||||
va_start(va, fmt); | |||||
e = vdprintf(fd, fmt, va); | |||||
va_end(va); | |||||
return e; | |||||
} |