X-Git-Url: https://arthur.barton.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=etc%2Fafpd%2Fafp_dsi.c;h=45e626431a14f228c6e387bc2d6f80afc0d0695a;hb=a201cc7f428a0dab661a3117fa3b8bf3028329a6;hp=8d135e528430d5749fb5feb0b85305d1fcc722ff;hpb=d37d6a2278b1f3babe2550a5acaa0120200616b8;p=netatalk.git

diff --git a/etc/afpd/afp_dsi.c b/etc/afpd/afp_dsi.c
index 8d135e52..45e62643 100644
--- a/etc/afpd/afp_dsi.c
+++ b/etc/afpd/afp_dsi.c
@@ -1,5 +1,5 @@
 /*
- * $Id: afp_dsi.c,v 1.27 2003-03-12 15:07:00 didg Exp $
+ * $Id: afp_dsi.c,v 1.44 2009-10-22 07:40:50 didg Exp $
  *
  * Copyright (c) 1999 Adrian Sun (asun@zoology.washington.edu)
  * Copyright (c) 1990,1993 Regents of The University of Michigan.
@@ -43,10 +43,10 @@
 #include "uid.h"
 #endif /* FORCE_UIDGID */
 
-extern struct oforks	*writtenfork;
-
 #define CHILD_DIE         (1 << 0)
 #define CHILD_RUNNING     (1 << 1)
+#define CHILD_SLEEPING    (1 << 2)
+#define CHILD_DATA        (1 << 3)
 
 static struct {
     AFPObj *obj;
@@ -55,25 +55,37 @@ static struct {
 } child;
 
 
-static __inline__ void afp_dsi_close(AFPObj *obj)
+static void afp_dsi_close(AFPObj *obj)
 {
     DSI *dsi = obj->handle;
 
+    close_all_vol();
     if (obj->logout)
         (*obj->logout)();
 
-    /* UAM had syslog control; afpd needs to reassert itself */
-    set_processname("afpd");
-    syslog_setup(log_debug, logtype_default, logoption_ndelay | logoption_pid, logfacility_daemon);
     LOG(log_info, logtype_afpd, "%.2fKB read, %.2fKB written",
         dsi->read_count/1024.0, dsi->write_count/1024.0);
 
     dsi_close(dsi);
 }
 
-/* a little bit of code duplication. */
+/* -------------------------------
+ * SIGTERM
+ * a little bit of code duplication. 
+ */
 static void afp_dsi_die(int sig)
 {
+static volatile int in_handler;
+    
+    if (in_handler) {
+    	return;
+    }
+    /* it's not atomic but we don't care because it's an exit function
+     * ie if a signal is received here, between the test and the affectation,
+     * it will not return.
+    */
+    in_handler = 1;
+
     dsi_attention(child.obj->handle, AFPATTN_SHUTDOWN);
     afp_dsi_close(child.obj);
     if (sig) /* if no signal, assume dieing because logins are disabled &
@@ -87,7 +99,15 @@ static void afp_dsi_die(int sig)
     }
 }
 
-static void afp_dsi_timedown()
+/* */
+static void afp_dsi_sleep(void)
+{
+    child.flags |= CHILD_SLEEPING;
+    dsi_sleep(child.obj->handle, 1);
+}
+
+/* ------------------- */
+static void afp_dsi_timedown(int sig _U_)
 {
     struct sigaction	sv;
     struct itimerval	it;
@@ -103,9 +123,9 @@ static void afp_dsi_timedown()
     it.it_value.tv_sec = 300;
     it.it_value.tv_usec = 0;
 
-    if ( setitimer( ITIMER_REAL, &it, 0 ) < 0 ) {
+    if ( setitimer( ITIMER_REAL, &it, NULL ) < 0 ) {
         LOG(log_error, logtype_afpd, "afp_timedown: setitimer: %s", strerror(errno) );
-        afp_dsi_die(1);
+        afp_dsi_die(EXITERR_SYS);
     }
     memset(&sv, 0, sizeof(sv));
     sv.sa_handler = afp_dsi_die;
@@ -113,153 +133,214 @@ static void afp_dsi_timedown()
     sigaddset(&sv.sa_mask, SIGHUP);
     sigaddset(&sv.sa_mask, SIGTERM);
     sv.sa_flags = SA_RESTART;
-    if ( sigaction( SIGALRM, &sv, 0 ) < 0 ) {
+    if ( sigaction( SIGALRM, &sv, NULL ) < 0 ) {
         LOG(log_error, logtype_afpd, "afp_timedown: sigaction: %s", strerror(errno) );
-        afp_dsi_die(1);
+        afp_dsi_die(EXITERR_SYS);
     }
 
-    /* ignore SIGHUP */
+    /* ignore myself */
     sv.sa_handler = SIG_IGN;
     sigemptyset( &sv.sa_mask );
     sv.sa_flags = SA_RESTART;
-    if ( sigaction( SIGHUP, &sv, 0 ) < 0 ) {
+    if ( sigaction( SIGUSR1, &sv, NULL ) < 0 ) {
         LOG(log_error, logtype_afpd, "afp_timedown: sigaction SIGHUP: %s", strerror(errno) );
-        afp_dsi_die(1);
+        afp_dsi_die(EXITERR_SYS);
     }
 
 }
 
+/* ---------------------------------
+ * SIGHUP reload configuration file
+ * FIXME here or we wait ?
+*/
+volatile int reload_request = 0;
+
+static void afp_dsi_reload(int sig _U_)
+{
+    reload_request = 1;
+}
+
+/* ---------------------- */
 #ifdef SERVERTEXT
-static void afp_dsi_getmesg (int sig)
+static void afp_dsi_getmesg (int sig _U_)
 {
-    readmessage();
+    DSI *dsi = (DSI *) child.obj->handle;
+
+    dsi->msg_request = 1;
     dsi_attention(child.obj->handle, AFPATTN_MESG | AFPATTN_TIME(5));
 }
 #endif /* SERVERTEXT */
 
-static void alarm_handler()
+static void alarm_handler(int sig _U_)
 {
-int err;
+    int err;
+    DSI *dsi = (DSI *) child.obj->handle;
+
+    /* we have to restart the timer because some libraries 
+     * may use alarm() */
+    setitimer(ITIMER_REAL, &dsi->timer, NULL);
+
+    /* we got some traffic from the client since the previous timer 
+     * tick. */
+    if ((child.flags & CHILD_DATA)) {
+        child.flags &= ~CHILD_DATA;
+        return;
+    }
+
     /* if we're in the midst of processing something,
        don't die. */
+    if ((child.flags & CHILD_SLEEPING) && child.tickle++ < child.obj->options.sleep) {
+        return;
+    } 
+        
     if ((child.flags & CHILD_RUNNING) || (child.tickle++ < child.obj->options.timeout)) {
         if (!(err = pollvoltime(child.obj)))
             err = dsi_tickle(child.obj->handle);
         if (err <= 0) 
-            afp_dsi_die(1);
+            afp_dsi_die(EXITERR_CLNT);
         
     } else { /* didn't receive a tickle. close connection */
         LOG(log_error, logtype_afpd, "afp_alarm: child timed out");
-        afp_dsi_die(1);
+        afp_dsi_die(EXITERR_CLNT);
     }
 }
 
-
-/*
- *  Signal handler for SIGUSR1 - set the debug flag and 
- *  redirect stdout to <tmpdir>/afpd-debug-<pid>.
- */
-void afp_set_debug (int sig)
+/* ----------------- 
+   if dsi->in_write is set attention, tickle (and close?) msg
+   aren't sent. We don't care about tickle 
+*/
+static void pending_request(DSI *dsi)
 {
-    char	fname[MAXPATHLEN];
-
-    snprintf(fname, MAXPATHLEN-1, "%safpd-debug-%d", P_tmpdir, getpid());
-    freopen(fname, "w", stdout);
-    child.obj->options.flags |= OPTION_DEBUG;
+    /* send pending attention */
 
-    return;
+    /* read msg if any, it could be done in afp_getsrvrmesg */
+    if (dsi->msg_request) {
+        dsi->msg_request = 0;
+        readmessage(child.obj);
+    }
 }
 
-
-/* afp over dsi. this never returns. */
+/* -------------------------------------------
+ afp over dsi. this never returns. 
+*/
 void afp_over_dsi(AFPObj *obj)
 {
     DSI *dsi = (DSI *) obj->handle;
     u_int32_t err, cmd;
     u_int8_t function;
     struct sigaction action;
+    const char *afpcmpstr;
 
     obj->exit = afp_dsi_die;
     obj->reply = (int (*)()) dsi_cmdreply;
     obj->attention = (int (*)(void *, AFPUserBytes)) dsi_attention;
 
+    obj->sleep = afp_dsi_sleep;
     child.obj = obj;
     child.tickle = child.flags = 0;
 
-    /* install SIGTERM and SIGHUP */
     memset(&action, 0, sizeof(action));
-    action.sa_handler = afp_dsi_timedown;
+
+    /* install SIGHUP */
+    action.sa_handler = afp_dsi_reload;
     sigemptyset( &action.sa_mask );
     sigaddset(&action.sa_mask, SIGALRM);
     sigaddset(&action.sa_mask, SIGTERM);
+    sigaddset(&action.sa_mask, SIGUSR1);
+#ifdef SERVERTEXT
+    sigaddset(&action.sa_mask, SIGUSR2);
+#endif    
     action.sa_flags = SA_RESTART;
-    if ( sigaction( SIGHUP, &action, 0 ) < 0 ) {
+    if ( sigaction( SIGHUP, &action, NULL ) < 0 ) {
         LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
-        afp_dsi_die(1);
+        afp_dsi_die(EXITERR_SYS);
     }
 
+    /* install SIGTERM */
     action.sa_handler = afp_dsi_die;
     sigemptyset( &action.sa_mask );
     sigaddset(&action.sa_mask, SIGALRM);
     sigaddset(&action.sa_mask, SIGHUP);
+    sigaddset(&action.sa_mask, SIGUSR1);
+#ifdef SERVERTEXT
+    sigaddset(&action.sa_mask, SIGUSR2);
+#endif    
     action.sa_flags = SA_RESTART;
-    if ( sigaction( SIGTERM, &action, 0 ) < 0 ) {
+    if ( sigaction( SIGTERM, &action, NULL ) < 0 ) {
         LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
-        afp_dsi_die(1);
+        afp_dsi_die(EXITERR_SYS);
     }
 
 #ifdef SERVERTEXT
     /* Added for server message support */
     action.sa_handler = afp_dsi_getmesg;
     sigemptyset( &action.sa_mask );
-    sigaddset(&action.sa_mask, SIGUSR2);
+    sigaddset(&action.sa_mask, SIGALRM);
+    sigaddset(&action.sa_mask, SIGTERM);
+    sigaddset(&action.sa_mask, SIGUSR1);
+    sigaddset(&action.sa_mask, SIGHUP);
     action.sa_flags = SA_RESTART;
-    if ( sigaction( SIGUSR2, &action, 0) < 0 ) {
+    if ( sigaction( SIGUSR2, &action, NULL) < 0 ) {
         LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
-        afp_dsi_die(1);
+        afp_dsi_die(EXITERR_SYS);
     }
 #endif /* SERVERTEXT */
 
-    /*  SIGUSR1 - set "debug" flag on this process.  */
-    action.sa_handler = afp_set_debug;
+    /*  SIGUSR1 - set down in 5 minutes  */
+    action.sa_handler = afp_dsi_timedown;
     sigemptyset( &action.sa_mask );
-    sigaddset(&action.sa_mask, SIGUSR1);
+    sigaddset(&action.sa_mask, SIGALRM);
+    sigaddset(&action.sa_mask, SIGHUP);
+    sigaddset(&action.sa_mask, SIGTERM);
+#ifdef SERVERTEXT
+    sigaddset(&action.sa_mask, SIGUSR2);
+#endif    
     action.sa_flags = SA_RESTART;
-    if ( sigaction( SIGUSR1, &action, 0) < 0 ) {
+    if ( sigaction( SIGUSR1, &action, NULL) < 0 ) {
         LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
-        afp_dsi_die(1);
+        afp_dsi_die(EXITERR_SYS);
     }
 
+#ifndef DEBUGGING
     /* tickle handler */
     action.sa_handler = alarm_handler;
     sigemptyset(&action.sa_mask);
     sigaddset(&action.sa_mask, SIGHUP);
     sigaddset(&action.sa_mask, SIGTERM);
+    sigaddset(&action.sa_mask, SIGUSR1);
+#ifdef SERVERTEXT
+    sigaddset(&action.sa_mask, SIGUSR2);
+#endif    
     action.sa_flags = SA_RESTART;
     if ((sigaction(SIGALRM, &action, NULL) < 0) ||
             (setitimer(ITIMER_REAL, &dsi->timer, NULL) < 0)) {
-        afp_dsi_die(1);
+        afp_dsi_die(EXITERR_SYS);
     }
+#endif /* DEBUGGING */
 
     /* get stuck here until the end */
     while ((cmd = dsi_receive(dsi))) {
         child.tickle = 0;
+        child.flags &= ~CHILD_SLEEPING;
         dsi_sleep(dsi, 0); /* wake up */
+        if (reload_request) {
+            reload_request = 0;
+            load_volumes(child.obj);
+        }
 
         if (cmd == DSIFUNC_TICKLE) {
-            /* so we don't get killed on the client side. */
-            if (child.flags & CHILD_DIE)
+            /* timer is not every 30 seconds anymore, so we don't get killed on the client side. */
+            if ((child.flags & CHILD_DIE))
                 dsi_tickle(dsi);
+            pending_request(dsi);
             continue;
-        } else if (!(child.flags & CHILD_DIE)) { /* reset tickle timer */
-            setitimer(ITIMER_REAL, &dsi->timer, NULL);
-        }
+        } 
+
+        child.flags |= CHILD_DATA;
         switch(cmd) {
         case DSIFUNC_CLOSE:
             afp_dsi_close(obj);
             LOG(log_info, logtype_afpd, "done");
-            if (obj->options.flags & OPTION_DEBUG )
-                printf("done\n");
             return;
             break;
 
@@ -274,10 +355,6 @@ void afp_over_dsi(AFPObj *obj)
 #endif /* AFS */
 
             function = (u_char) dsi->commands[0];
-            if (obj->options.flags & OPTION_DEBUG ) {
-                printf("command: %d (%s)\n", function, AfpNum2name(function));
-                bprint((char *) dsi->commands, dsi->cmdlen);
-            }
 
             /* send off an afp command. in a couple cases, we take advantage
              * of the fact that we're a stream-based protocol. */
@@ -285,12 +362,17 @@ void afp_over_dsi(AFPObj *obj)
                 dsi->datalen = DSI_DATASIZ;
                 child.flags |= CHILD_RUNNING;
 
+                afpcmpstr = AfpNum2name(function);
+                LOG(log_debug, logtype_afpd, "=> Start AFP command: %s", afpcmpstr);
+
                 err = (*afp_switch[function])(obj,
                                               dsi->commands, dsi->cmdlen,
                                               dsi->data, &dsi->datalen);
+
+                LOG(log_debug, logtype_afpd, "=> Finished AFP command: %s", afpcmpstr);
 #ifdef FORCE_UIDGID
             	/* bring everything back to old euid, egid */
-		if (obj->force_uid)
+                if (obj->force_uid)
             	    restore_uidgid ( &obj->uidgid );
 #endif /* FORCE_UIDGID */
                 child.flags &= ~CHILD_RUNNING;
@@ -306,24 +388,14 @@ void afp_over_dsi(AFPObj *obj)
                 break;
             }
 
-            if (obj->options.flags & OPTION_DEBUG ) {
-                printf( "reply: %d, %d\n", err, dsi->clientID);
-                bprint((char *) dsi->data, dsi->datalen);
-            }
-
             if (!dsi_cmdreply(dsi, err)) {
                 LOG(log_error, logtype_afpd, "dsi_cmdreply(%d): %s", dsi->socket, strerror(errno) );
-                afp_dsi_die(1);
+                afp_dsi_die(EXITERR_CLNT);
             }
             break;
 
         case DSIFUNC_WRITE: /* FPWrite and FPAddIcon */
             function = (u_char) dsi->commands[0];
-            if ( obj->options.flags & OPTION_DEBUG ) {
-                printf("(write) command: %d, %d\n", function, dsi->cmdlen);
-                bprint((char *) dsi->commands, dsi->cmdlen);
-            }
-
             if ( afp_switch[ function ] != NULL ) {
                 dsi->datalen = DSI_DATASIZ;
                 child.flags |= CHILD_RUNNING;
@@ -341,19 +413,13 @@ void afp_over_dsi(AFPObj *obj)
                 err = AFPERR_NOOP;
             }
 
-            if (obj->options.flags & OPTION_DEBUG ) {
-                printf( "(write) reply code: %d, %d\n", err, dsi->clientID);
-                bprint((char *) dsi->data, dsi->datalen);
-            }
-
             if (!dsi_wrtreply(dsi, err)) {
                 LOG(log_error, logtype_afpd, "dsi_wrtreply: %s", strerror(errno) );
-                afp_dsi_die(1);
+                afp_dsi_die(EXITERR_CLNT);
             }
             break;
 
         case DSIFUNC_ATTN: /* attention replies */
-            continue;
             break;
 
             /* error. this usually implies a mismatch of some kind
@@ -365,16 +431,9 @@ void afp_over_dsi(AFPObj *obj)
             dsi_writeflush(dsi);
             break;
         }
-
-        if ( obj->options.flags & OPTION_DEBUG ) {
-#ifdef notdef
-            pdesc( stdout );
-#endif /* notdef */
-            of_pforkdesc( stdout );
-            fflush( stdout );
-        }
+        pending_request(dsi);
     }
 
     /* error */
-    afp_dsi_die(1);
+    afp_dsi_die(EXITERR_CLNT);
 }