mirror of
https://gitlab.com/openconnect/ocserv.git
synced 2026-08-08 09:21:48 +08:00
Nikos Mavrogiannopoulos
0f5c628048
ocserv always logged to the syslog daemon(3) facility, making it impossible to route its messages separately from other daemons. Adds a syslog-facility config key (and --syslog-facility CLI flag) accepting daemon/user/auth/authpriv/local0-local7; defaults to daemon. Resolves: #691 Signed-off-by: Nikos Mavrogiannopoulos <n.mavrogiannopoulos@gmail.com>
84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/*
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* Copyright (C) 2026 Nikos Mavrogiannopoulos
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* LD_PRELOAD shim that intercepts openlog(3) and appends the facility name
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* (one per line) to the file named by $SYSLOG_SHIM_OUT.
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*
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* Used by test-syslog-facility to verify that ocserv passes the configured
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* syslog facility to openlog() without requiring a real syslog daemon.
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* Multiple processes (main + worker) call openlog(); the test uses grep to
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* confirm the expected facility appears at least once.
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <dlfcn.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <syslog.h>
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static const char *facility_name(int facility)
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{
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switch (facility) {
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case LOG_DAEMON:
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return "daemon";
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case LOG_USER:
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return "user";
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case LOG_AUTH:
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return "auth";
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case LOG_LOCAL0:
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return "local0";
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case LOG_LOCAL1:
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return "local1";
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case LOG_LOCAL2:
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return "local2";
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case LOG_LOCAL3:
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return "local3";
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case LOG_LOCAL4:
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return "local4";
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case LOG_LOCAL5:
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return "local5";
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case LOG_LOCAL6:
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return "local6";
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case LOG_LOCAL7:
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return "local7";
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#ifdef LOG_AUTHPRIV
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case LOG_AUTHPRIV:
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return "authpriv";
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#endif
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default:
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return "unknown";
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}
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}
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void openlog(const char *ident, int logopt, int facility)
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{
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static void (*real_openlog)(const char *, int, int);
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const char *out;
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FILE *f;
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out = getenv("SYSLOG_SHIM_OUT");
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if (out != NULL) {
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f = fopen(out, "a");
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if (f != NULL) {
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fprintf(f, "%s\n", facility_name(facility));
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fclose(f);
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}
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}
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if (real_openlog == NULL)
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real_openlog = dlsym(RTLD_NEXT, "openlog");
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if (real_openlog != NULL)
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real_openlog(ident, logopt, facility);
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}
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