107 lines
3.0 KiB
C
107 lines
3.0 KiB
C
/* Copyright (c) 2016 Phoenix Systems
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.*/
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#include <arpa/inet.h>
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#include <errno.h>
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#include <netinet/in.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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#include <sys/socket.h>
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#include <syslog.h>
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#include <unistd.h>
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#define BUFFER_SIZE 1024
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#define LOG_MAX_SIZE (3 * 512)
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struct {
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int socket;
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struct sockaddr_in addr;
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const char *ident;
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int option;
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int facility;
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int tried;
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} client = {
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.ident = NULL,
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.socket = -1,
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.option = 0,
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.facility = 0,
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};
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void openlog(const char *ident, int option, int facility)
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{
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if (client.socket != -1)
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return;
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client.ident = ident;
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client.option = option;
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client.facility = facility;
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if (client.ident == NULL)
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client.ident = "app";
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if ((client.socket = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
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printf("Socket failed: %s\n", strerror(errno));
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return;
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}
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memset(&(client.addr), 0, sizeof(client.addr));
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client.addr.sin_family = AF_INET;
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client.addr.sin_addr.s_addr = inet_addr("127.0.0.1");
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client.addr.sin_port = htons(31000);
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}
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void syslog(int priority, const char *format, ...)
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{
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char buffer[BUFFER_SIZE];
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char msg[LOG_MAX_SIZE];
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memset(buffer, 0, sizeof(buffer));
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memset(msg, 0, sizeof(msg));
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if (LOG_FAC(priority) == 0)
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priority |= client.facility;
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va_list args;
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va_start(args, format);
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vsnprintf(buffer, sizeof(buffer), format, args);
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va_end(args);
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snprintf(msg, sizeof(msg), "<%d> %s[%d]: %s", priority, client.ident, getpid(), buffer);
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if (sendto(client.socket, msg, strlen(msg), 0, (struct sockaddr *) &(client.addr), sizeof(client.addr)) == -1) {
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printf("Send failed: %s\n", strerror(errno));
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return;
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}
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}
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void closelog()
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{
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if (client.socket == -1)
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return;
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close(client.socket);
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client.ident = NULL;
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client.socket = -1;
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}
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