sortix-mirror/libc/err/vwarnc.c
2016-11-06 15:31:52 -06:00

37 lines
1.2 KiB
C

/*
* Copyright (c) 2016 Jonas 'Sortie' Termansen.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* err/vwarnc.c
* Print an error message to stderr.
*/
#include <err.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
void vwarnc(int errnum, const char* fmt, va_list ap)
{
flockfile(stderr);
fprintf_unlocked(stderr, "%s: ", program_invocation_name);
if ( fmt )
{
vfprintf_unlocked(stderr, fmt, ap);
fputs_unlocked(": ", stderr);
}
fprintf_unlocked(stderr, "%s\n", strerror(errnum));
funlockfile(stderr);
}