logfile: Log to stderr by default (`filename' key now optional)

[secnet.git] / log.c

diff --git a/log.c b/log.c
index a17032bb3e255ea8db651b7cb5afd8eaa0fc62ec..4043ab0c6a0b99fd4220c81b01f84e4d70b0babc 100644 (file)
--- a/log.c
+++ b/log.c
@@ -1,3 +1,21 @@
+/*
+ * This file is part of secnet.
+ * See README for full list of copyright holders.
+ *
+ * secnet is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * secnet is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * version 3 along with secnet; if not, see
+ * https://www.gnu.org/licenses/gpl.html.
+ */
 #include "secnet.h"
 #include <stdio.h>
 #include <string.h>
@@ -14,8 +32,7 @@ bool_t secnet_is_daemon=False;
 uint32_t message_level=M_WARNING|M_ERR|M_SECURITY|M_FATAL;
 struct log_if *system_log=NULL;
 
-static void vMessageFallback(uint32_t class, const char *message, va_list args)
-    FORMAT(printf,2,0);
+FORMAT(printf,2,0)
 static void vMessageFallback(uint32_t class, const char *message, va_list args)
 {
     FILE *dest=stdout;
@@ -28,6 +45,7 @@ static void vMessageFallback(uint32_t class, const char *message, va_list args)
     }
 }
 
+FORMAT(printf,2,0)
 static void vMessage(uint32_t class, const char *message, va_list args)
 {
 
@@ -48,8 +66,7 @@ void Message(uint32_t class, const char *message, ...)
     va_end(ap);
 }
 
-static void MessageFallback(uint32_t class, const char *message, ...)
-    FORMAT(printf,2,3);
+FORMAT(printf,2,3)
 static void MessageFallback(uint32_t class, const char *message, ...)
 {
     va_list ap;
@@ -62,6 +79,7 @@ static void MessageFallback(uint32_t class, const char *message, ...)
 static NORETURN(vfatal(int status, bool_t perror, const char *message,
                       va_list args));
 
+FORMAT(printf,3,0)
 static void vfatal(int status, bool_t perror, const char *message,
                   va_list args)
 {
@@ -175,6 +193,7 @@ struct loglist {
     struct loglist *next;
 };
 
+FORMAT(printf, 3, 0)
 static void log_vmulti(void *sst, int class, const char *message, va_list args)
 {
     struct loglist *st=sst, *i;
@@ -189,6 +208,7 @@ static void log_vmulti(void *sst, int class, const char *message, va_list args)
     }
 }
 
+FORMAT(printf, 6, 0)
 void lg_vperror(struct log_if *lg, const char *desc, struct cloc *loc,
                int class, int errnoval, const char *fmt, va_list al)
 {
@@ -274,7 +294,7 @@ struct log_if *init_log(list_t *ll)
     if (!l) {
        fatal("init_log: no log");
     }
-    r=safe_malloc(sizeof(*r), "init_log");
+    NEW(r);
     r->st=l;
     r->vlogfn=log_vmulti;
     r->buff[0]=0;
@@ -294,6 +314,7 @@ struct logfile {
 static cstring_t months[]={
     "Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};
 
+FORMAT(printf, 3, 0)
 static void logfile_vlog(void *sst, int class, const char *message,
                         va_list args)
 {
@@ -328,8 +349,7 @@ static void logfile_vlog(void *sst, int class, const char *message,
     }
 }
 
-static void logfile_log(void *state, int class, const char *message, ...)
-    FORMAT(printf,3,4);
+FORMAT(printf,3,4)
 static void logfile_log(void *state, int class, const char *message, ...)
 {
     va_list ap;
@@ -343,6 +363,7 @@ static void logfile_hup_notify(void *sst, int signum)
 {
     struct logfile *st=sst;
     FILE *f;
+    if (!st->logfile) return;
     f=fopen(st->logfile,"a");
     if (!f) {
        logfile_log(st,M_FATAL,"received SIGHUP, but could not reopen "
@@ -359,7 +380,7 @@ static void logfile_phase_hook(void *sst, uint32_t new_phase)
     struct logfile *st=sst;
     FILE *f;
 
-    if (background) {
+    if (background && st->logfile) {
        f=fopen(st->logfile,"a");
        if (!f) fatal_perror("logfile (%s:%d): cannot open \"%s\"",
                             st->loc.file,st->loc.line,st->logfile);
@@ -411,7 +432,7 @@ static list_t *logfile_apply(closure_t *self, struct cloc loc, dict_t *context,
     st->ops.vlogfn=logfile_vlog;
     st->ops.buff[0]=0;
     st->loc=loc;
-    st->f=NULL;
+    st->f=stderr;
     st->forked=0;
 
     item=list_elem(args,0);
@@ -420,7 +441,7 @@ static list_t *logfile_apply(closure_t *self, struct cloc loc, dict_t *context,
     }
     dict=item->data.dict;
 
-    st->logfile=dict_read_string(dict,"filename",True,"logfile",loc);
+    st->logfile=dict_read_string(dict,"filename",False,"logfile",loc);
     st->level=string_list_to_word(dict_lookup(dict,"class"),
                                       message_class_table,"logfile");
 
@@ -629,6 +650,8 @@ void log_from_fd(int fd, cstring_t prefix, struct log_if *log)
 
 void log_module(dict_t *dict)
 {
+    setlinebuf(stderr);
+
     add_closure(dict,"logfile",logfile_apply);
     add_closure(dict,"syslog",syslog_apply);
 }