/*
- * $Id: afp_dsi.c,v 1.31 2003-06-26 02:15:21 didg Exp $
+ * $Id: afp_dsi.c,v 1.53 2010-03-30 12:55:26 franklahm Exp $
*
* Copyright (c) 1999 Adrian Sun (asun@zoology.washington.edu)
* Copyright (c) 1990,1993 Regents of The University of Michigan.
#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)
+
+/*
+ * We generally pass this from afp_over_dsi to all afp_* funcs, so it should already be
+ * available everywhere. Unfortunately some funcs (eg acltoownermode) need acces to it
+ * but are deeply nested in the function chain with the caller already without acces to it.
+ * Changing this would require adding a reference to the caller which itself might be
+ * called in many places (eg acltoownermode is called from accessmode).
+ * The only sane way out is providing a copy of it here:
+ */
+AFPObj *AFPobj = NULL;
static struct {
AFPObj *obj;
} child;
-static __inline__ void afp_dsi_close(AFPObj *obj)
+static void afp_dsi_close(AFPObj *obj)
{
DSI *dsi = obj->handle;
+ /* we may have been called from a signal handler caught when afpd was running
+ * as uid 0, that's the wrong user for volume's prexec_close scripts if any,
+ * restore our login user
+ */
+ if (seteuid( obj->uid ) < 0) {
+ LOG(log_error, logtype_afpd, "can't seteuid back %s", strerror(errno));
+ exit(EXITERR_SYS);
+ }
+ 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);
- close_vols();
}
-/* 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 &
}
/* ------------------- */
-static void afp_dsi_timedown()
+static void afp_dsi_timedown(int sig _U_)
{
struct sigaction sv;
struct itimerval it;
child.flags |= CHILD_DIE;
/* shutdown and don't reconnect. server going down in 5 minutes. */
setmessage("The server is going down for maintenance.");
- dsi_attention(child.obj->handle, AFPATTN_SHUTDOWN | AFPATTN_NORECONNECT |
- AFPATTN_MESG | AFPATTN_TIME(5));
+ if (dsi_attention(child.obj->handle, AFPATTN_SHUTDOWN | AFPATTN_NORECONNECT |
+ AFPATTN_MESG | AFPATTN_TIME(5)) < 0) {
+ DSI *dsi = (DSI *) child.obj->handle;
+ dsi->down_request = 1;
+ }
it.it_interval.tv_sec = 0;
it.it_interval.tv_usec = 0;
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;
sigemptyset( &sv.sa_mask );
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;
}
+/* ---------------------------------
+ * SIGINT: enable max_debug LOGging
+ */
+static volatile sig_atomic_t debug_request = 0;
+
+static void afp_dsi_debug(int sig _U_)
+{
+ debug_request = 1;
+}
+
+/* ---------------------- */
#ifdef SERVERTEXT
-static void afp_dsi_getmesg (int sig)
+static void afp_dsi_getmesg (int sig _U_)
{
- readmessage();
- dsi_attention(child.obj->handle, AFPATTN_MESG | AFPATTN_TIME(5));
+ DSI *dsi = (DSI *) child.obj->handle;
+
+ dsi->msg_request = 1;
+ if (dsi_attention(child.obj->handle, AFPATTN_MESG | AFPATTN_TIME(5)) < 0)
+ dsi->msg_request = 2;
}
#endif /* SERVERTEXT */
-static void alarm_handler()
+static void alarm_handler(int sig _U_)
{
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;
- } else if ((child.flags & CHILD_RUNNING) || (child.tickle++ < child.obj->options.timeout)) {
+ }
+
+ 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, "%s/afpd-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) {
+ if (dsi->msg_request == 2) {
+ /* didn't send it in signal handler */
+ dsi_attention(child.obj->handle, AFPATTN_MESG | AFPATTN_TIME(5));
+ }
+ dsi->msg_request = 0;
+ readmessage(child.obj);
+ }
+ if (dsi->down_request) {
+ dsi->down_request = 0;
+ dsi_attention(child.obj->handle, AFPATTN_SHUTDOWN | AFPATTN_NORECONNECT |
+ AFPATTN_MESG | AFPATTN_TIME(5));
+ }
}
-
-/* afp over dsi. this never returns. */
+/* -------------------------------------------
+ afp over dsi. this never returns.
+*/
void afp_over_dsi(AFPObj *obj)
{
DSI *dsi = (DSI *) obj->handle;
u_int8_t function;
struct sigaction action;
+ AFPobj = obj;
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);
+ sigaddset(&action.sa_mask, SIGINT);
+#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);
+ sigaddset(&action.sa_mask, SIGINT);
+#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);
+ sigaddset(&action.sa_mask, SIGINT);
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);
+ sigaddset(&action.sa_mask, SIGINT);
+#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);
}
+ /* SIGINT - enable max_debug LOGging to /tmp/afpd.PID.XXXXXX */
+ action.sa_handler = afp_dsi_debug;
+ sigfillset( &action.sa_mask );
+ action.sa_flags = SA_RESTART;
+ if ( sigaction( SIGINT, &action, NULL) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
+ 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);
+ sigaddset(&action.sa_mask, SIGINT);
+#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.flags &= ~CHILD_SLEEPING;
dsi_sleep(dsi, 0); /* wake up */
+ if (reload_request) {
+ reload_request = 0;
+ load_volumes(child.obj);
+ }
+
+ if (debug_request) {
+ char logstr[50];
+ debug_request = 0;
+
+ /* The first SIGINT enables debugging, the second one kills us */
+ action.sa_handler = afp_dsi_die;
+ sigfillset( &action.sa_mask );
+ action.sa_flags = SA_RESTART;
+ if ( sigaction( SIGINT, &action, NULL ) < 0 ) {
+ LOG(log_error, logtype_afpd, "afp_over_dsi: sigaction: %s", strerror(errno) );
+ afp_dsi_die(EXITERR_SYS);
+ }
+
+ sprintf(logstr, "default log_maxdebug /tmp/afpd.%u.XXXXXX", getpid());
+ setuplog(logstr);
+ }
+
if (cmd == DSIFUNC_TICKLE) {
- /* so we don't get killed on the client side. */
+ /* 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;
#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. */
dsi->datalen = DSI_DATASIZ;
child.flags |= CHILD_RUNNING;
+ LOG(log_debug, logtype_afpd, "<== Start AFP command: %s", AfpNum2name(function));
+
err = (*afp_switch[function])(obj,
- dsi->commands, dsi->cmdlen,
- dsi->data, &dsi->datalen);
+ (char *)&dsi->commands, dsi->cmdlen,
+ (char *)&dsi->data, &dsi->datalen);
+
+ LOG(log_debug, logtype_afpd, "==> Finished AFP command: %s -> %s",
+ AfpNum2name(function), AfpErr2name(err));
#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;
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;
- err = (*afp_switch[function])(obj, dsi->commands, dsi->cmdlen,
- dsi->data, &dsi->datalen);
+
+ LOG(log_debug, logtype_afpd, "<== Start AFP command: %s", AfpNum2name(function));
+
+ err = (*afp_switch[function])(obj,
+ (char *)&dsi->commands, dsi->cmdlen,
+ (char *)&dsi->data, &dsi->datalen);
+
+ LOG(log_debug, logtype_afpd, "==> Finished AFP command: %s -> %s",
+ AfpNum2name(function), AfpErr2name(err));
+
child.flags &= ~CHILD_RUNNING;
#ifdef FORCE_UIDGID
/* bring everything back to old euid, egid */
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
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);
}
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