44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2015.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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err/vwarn.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 vwarn(const char* fmt, va_list ap)
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{
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int errnum = errno;
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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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