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