logging: Provide lg_exitstatus

[secnet.git] / log.c

diff --git a/log.c b/log.c
index d330113f0c1b8fe0255eab9ea60f87c37827686c..3748f9157d15dc7778847201c0eaed777f39fdc5 100644 (file)
--- a/log.c
+++ b/log.c
@@ -30,24 +30,10 @@ static void vMessageFallback(uint32_t class, const char *message, va_list args)
 
 static void vMessage(uint32_t class, const char *message, va_list args)
 {
-#define MESSAGE_BUFLEN 1023
-    static char buff[MESSAGE_BUFLEN+1]={0,};
-    size_t bp;
-    char *nlp;
 
     if (system_log) {
        /* Messages go to the system log interface */
-       bp=strlen(buff);
-       assert(bp < MESSAGE_BUFLEN);
-       vsnprintf(buff+bp,MESSAGE_BUFLEN-bp,message,args);
-       buff[sizeof(buff)-2] = '\n';
-       buff[sizeof(buff)-1] = '\0';
-       /* Each line is sent separately */
-       while ((nlp=strchr(buff,'\n'))) {
-           *nlp=0;
-           slilog(system_log,class,"%s",buff);
-           memmove(buff,nlp+1,strlen(nlp+1)+1);
-       }
+       vslilog_part(system_log, class, message, args);
     } else {
        vMessageFallback(class,message,args);
     }
@@ -203,15 +189,57 @@ static void log_vmulti(void *sst, int class, const char *message, va_list args)
     }
 }
 
-static void log_multi(void *st, int priority, const char *message, ...)
-    FORMAT(printf,3,4);
-static void log_multi(void *st, int priority, const char *message, ...)
+void lg_vperror(struct log_if *lg, const char *desc, struct cloc *loc,
+               int class, int errnoval, const char *fmt, va_list al)
 {
-    va_list ap;
+    int status=current_phase;
+    int esave=errno;
 
-    va_start(ap,message);
-    log_vmulti(st,priority,message,ap);
-    va_end(ap);
+    if (!lg)
+       lg=system_log;
+
+    if (class & M_FATAL)
+       enter_phase(PHASE_SHUTDOWN);
+
+    slilog_part(lg,class,"%s",desc);
+    if (loc)
+       slilog_part(lg,class," (%s:%d)",loc->file,loc->line);
+    slilog_part(lg,class,": ");
+    vslilog_part(lg,class,fmt,al);
+    if (errnoval)
+       slilog_part(lg,class,": %s",strerror(errnoval));
+    slilog_part(lg,class,"\n");
+
+    if (class & M_FATAL)
+       exit(status);
+
+    errno=esave;
+}
+
+void lg_perror(struct log_if *lg, const char *desc, struct cloc *loc,
+              int class, int errnoval, const char *fmt, ...)
+{
+    va_list al;
+    va_start(al,fmt);
+    lg_vperror(lg,desc,loc,class,errnoval,fmt,al);
+    va_end(al);
+}
+
+void lg_exitstatus(struct log_if *lg, const char *desc, struct cloc *loc,
+                  int class, int status, const char *progname)
+{
+    if (!status)
+       lg_perror(lg,desc,loc,class,0,"%s exited",progname);
+    else if (WIFEXITED(status))
+       lg_perror(lg,desc,loc,class,0,"%s exited with error exit status %d",
+                 progname,WEXITSTATUS(status));
+    else if (WIFSIGNALED(status))
+       lg_perror(lg,desc,loc,class,0,"%s died due to fatal signal %s (%d)%s",
+                 progname,strsignal(WTERMSIG(status)),WTERMSIG(status),
+                 WCOREDUMP(status)?" (core dumped)":"");
+    else
+       lg_perror(lg,desc,loc,class,0,"%s died with unknown wait status %d",
+                 progname,status);
 }
 
 struct log_if *init_log(list_t *ll)
@@ -248,8 +276,8 @@ struct log_if *init_log(list_t *ll)
     }
     r=safe_malloc(sizeof(*r), "init_log");
     r->st=l;
-    r->logfn=log_multi;
     r->vlogfn=log_vmulti;
+    r->buff[0]=0;
     return r;
 }
 
@@ -363,8 +391,8 @@ static list_t *logfile_apply(closure_t *self, struct cloc loc, dict_t *context,
     st->cl.apply=NULL;
     st->cl.interface=&st->ops;
     st->ops.st=st;
-    st->ops.logfn=logfile_log;
     st->ops.vlogfn=logfile_vlog;
+    st->ops.buff[0]=0;
     st->loc=loc;
     st->f=NULL;
 
@@ -423,17 +451,6 @@ static void syslog_vlog(void *sst, int class, const char *message,
     }
 }
 
-static void syslog_log(void *sst, int priority, const char *message, ...)
-    FORMAT(printf,3,4);
-static void syslog_log(void *sst, int priority, const char *message, ...)
-{
-    va_list ap;
-
-    va_start(ap,message);
-    syslog_vlog(sst,priority,message,ap);
-    va_end(ap);
-}
-
 static struct flagstr syslog_facility_table[]={
 #ifdef LOG_AUTH
     { "auth", LOG_AUTH },
@@ -485,8 +502,8 @@ static list_t *syslog_apply(closure_t *self, struct cloc loc, dict_t *context,
     st->cl.apply=NULL;
     st->cl.interface=&st->ops;
     st->ops.st=st;
-    st->ops.logfn=syslog_log;
     st->ops.vlogfn=syslog_vlog;
+    st->ops.buff[0]=0;
 
     item=list_elem(args,0);
     if (!item || item->type!=t_dict)
@@ -521,9 +538,11 @@ static int log_from_fd_beforepoll(void *sst, struct pollfd *fds, int *nfds_io,
 {
     struct fdlog *st=sst;
     if (!st->finished) {
-       *nfds_io=1;
+       BEFOREPOLL_WANT_FDS(1);
        fds[0].fd=st->fd;
        fds[0].events=POLLIN;
+    } else {
+       BEFOREPOLL_WANT_FDS(0);
     }
     return 0;
 }
@@ -579,7 +598,7 @@ void log_from_fd(int fd, cstring_t prefix, struct log_if *log)
     st->i=0;
     st->finished=False;
 
-    register_for_poll(st,log_from_fd_beforepoll,log_from_fd_afterpoll,1,
+    register_for_poll(st,log_from_fd_beforepoll,log_from_fd_afterpoll,
                      prefix);
 }