446ae3f507
In the pre-POSIX days BSD had strings.h, not string.h. Now strings.h is only used for non-ANSI string functions.
80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
/*
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* SPDX-License-Identifier: ISC
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*
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* Copyright (c) 2016-2017 Todd C. Miller <Todd.Miller@sudo.ws>
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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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/*
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* This is an open source non-commercial project. Dear PVS-Studio, please check it.
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* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
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*/
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#include <config.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 <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include "sudo_compat.h"
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#ifndef HAVE_VSYSLOG
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void
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sudo_vsyslog(int pri, const char *fmt, va_list ap)
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{
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int saved_errno = errno;
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char *cp, *ep, msgbuf[8192], new_fmt[2048];
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va_list ap2;
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size_t len;
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/* Rewrite fmt, replacing %m with an errno string. */
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for (cp = new_fmt, ep = new_fmt + sizeof(new_fmt); *fmt != '\0'; fmt++) {
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if (fmt[0] == '%' && fmt[1] == 'm') {
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fmt++;
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len = strlcpy(cp, strerror(saved_errno), (ep - cp));
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if (len >= (size_t)(ep - cp))
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len = (size_t)(ep - cp) - 1;
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cp += len;
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} else {
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if (fmt[0] == '%' && fmt[1] == '%') {
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fmt++;
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if (cp < ep - 1)
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*cp++ = '%';
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}
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if (cp < ep - 1)
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*cp++ = *fmt;
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}
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}
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*cp = '\0';
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/* Format message and log it, using a static buffer if possible. */
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va_copy(ap2, ap);
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len = (size_t)vsnprintf(msgbuf, sizeof(msgbuf), new_fmt, ap2);
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va_end(ap2);
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if (len < sizeof(msgbuf)) {
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syslog(pri, "%s", msgbuf);
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} else {
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/* Too big for static buffer? */
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char *buf;
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if (vasprintf(&buf, new_fmt, ap) != -1) {
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syslog(pri, "%s", buf);
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free(buf);
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}
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}
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}
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#endif /* HAVE_VSYSLOG */
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