X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/3036551977f003d9ef3bc15e682201272f400840..ca6b4a12640792d416b9fcbeb4baa8a3b84285ff:/server/server.c

diff --git a/server/server.c b/server/server.c
index a7fad01..2874357 100644
--- a/server/server.c
+++ b/server/server.c
@@ -1,72 +1,22 @@
 /*
  * This file is part of DisOrder.
- * Copyright (C) 2004, 2005, 2006, 2007 Richard Kettlewell
+ * Copyright (C) 2004-2008 Richard Kettlewell
  *
- * This program is free software; you can redistribute it and/or modify
+ * This program 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 2 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
  *
- * This program 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.
- *
+ * This program 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
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <config.h>
-#include "types.h"
-
-#include <pwd.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/time.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <gcrypt.h>
-#include <stddef.h>
-#include <time.h>
-#include <limits.h>
-#include <pcre.h>
-#include <netdb.h>
-#include <netinet/in.h>
-
-#include "event.h"
-#include "server.h"
-#include "syscalls.h"
-#include "queue.h"
-#include "server-queue.h"
-#include "play.h"
-#include "log.h"
-#include "mem.h"
-#include "state.h"
-#include "charset.h"
-#include "split.h"
-#include "configuration.h"
-#include "hex.h"
-#include "rights.h"
-#include "trackdb.h"
-#include "table.h"
-#include "kvp.h"
-#include "mixer.h"
-#include "sink.h"
-#include "authhash.h"
-#include "plugin.h"
-#include "printf.h"
-#include "trackname.h"
-#include "eventlog.h"
-#include "defs.h"
-#include "cache.h"
-#include "unicode.h"
-#include "cookies.h"
-#include "base64.h"
+#include "disorder-server.h"
 
 #ifndef NONCE_SIZE
 # define NONCE_SIZE 16
@@ -118,8 +68,15 @@ struct conn {
   char *cookie;
   /** @brief Connection rights */
   rights_type rights;
+  /** @brief Next connection */
+  struct conn *next;
+  /** @brief True if pending rescan had 'wait' set */
+  int rescan_wait;
 };
 
+/** @brief Linked list of connections */
+static struct conn *connections;
+
 static int reader_callback(ev_source *ev,
 			   ev_reader *reader,
 			   void *ptr,
@@ -129,6 +86,16 @@ static int reader_callback(ev_source *ev,
 
 static const char *noyes[] = { "no", "yes" };
 
+/** @brief Remove a connection from the connection list */
+static void remove_connection(struct conn *c) {
+  struct conn **cc;
+
+  for(cc = &connections; *cc && *cc != c; cc = &(*cc)->next)
+    ;
+  if(*cc)
+    *cc = c->next;
+}
+
 /** @brief Called when a connection's writer fails or is shut down
  *
  * If the connection still has a raeder that is cancelled.
@@ -154,6 +121,7 @@ static int writer_error(ev_source attribute((unused)) *ev,
   }
   c->w = 0;
   ev_report(ev);
+  remove_connection(c);
   return 0;
 }
 
@@ -173,6 +141,7 @@ static int reader_error(ev_source attribute((unused)) *ev,
   c->w = 0;
   c->r = 0;
   ev_report(ev);
+  remove_connection(c);
   return 0;
 }
 
@@ -219,7 +188,7 @@ static int c_play(struct conn *c, char **vec,
     sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
     return 1;
   }
-  q = queue_add(track, c->who, WHERE_BEFORE_RANDOM);
+  q = queue_add(track, c->who, WHERE_BEFORE_RANDOM, origin_picked);
   queue_write();
   /* If we added the first track, and something is playing, then prepare the
    * new track.  If nothing is playing then we don't bother as it wouldn't gain
@@ -251,9 +220,8 @@ static int c_remove(struct conn *c, char **vec,
   queue_remove(q, c->who);
   /* De-prepare the track. */
   abandon(c->ev, q);
-  /* If we removed a random track then add another one. */
-  if(q->state == playing_random)
-    add_random_track();
+  /* See about adding a new random track */
+  add_random_track(c->ev);
   /* Prepare whatever the next head track is. */
   if(qhead.next != &qhead)
     prepare(c->ev, qhead.next);
@@ -335,13 +303,107 @@ static int c_reconfigure(struct conn *c,
   return 1;				/* completed */
 }
 
+static void finished_rescan(void *ru) {
+  struct conn *const c = ru;
+
+  sink_writes(ev_writer_sink(c->w), "250 rescan completed\n");
+  /* Turn this connection back on */
+  ev_reader_enable(c->r);
+}
+
+static void start_fresh_rescan(void *ru) {
+  struct conn *const c = ru;
+
+  if(trackdb_rescan_underway()) {
+    /* Some other waiter beat us to it.  However in this case we're happy to
+     * piggyback; the requirement is that a new rescan be started, not that it
+     * was _our_ rescan. */
+    if(c->rescan_wait) {
+      /* We block until the rescan completes */
+      trackdb_add_rescanned(finished_rescan, c);
+    } else {
+      /* We report that the new rescan has started */
+      sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
+      /* Turn this connection back on */
+      ev_reader_enable(c->r);
+    }
+  } else {
+    /* We are the first connection to get a callback so we must start a
+     * rescan. */
+    if(c->rescan_wait) {
+      /* We want to block until the new rescan completes */
+      trackdb_rescan(c->ev, 1/*check*/, finished_rescan, c);
+    } else {
+      /* We can report back immediately */
+      trackdb_rescan(c->ev, 1/*check*/, 0, 0);
+      sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
+      /* Turn this connection back on */
+      ev_reader_enable(c->r);
+    }
+  }
+}
+
 static int c_rescan(struct conn *c,
-		    char attribute((unused)) **vec,
-		    int attribute((unused)) nvec) {
-  info("S%x rescan by %s", c->tag, c->who);
-  trackdb_rescan(c->ev);
-  sink_writes(ev_writer_sink(c->w), "250 initiated rescan\n");
-  return 1;				/* completed */
+		    char **vec,
+		    int nvec) {
+  int flag_wait = 0, flag_fresh = 0, n;
+
+  /* Parse flags */
+  for(n = 0; n < nvec; ++n) {
+    if(!strcmp(vec[n], "wait"))
+      flag_wait = 1;			/* wait for rescan to complete */
+#if 0
+    /* Currently disabled because untested (and hard to test). */
+    else if(!strcmp(vec[n], "fresh"))
+      flag_fresh = 1;			/* don't piggyback underway rescan */
+#endif
+    else {
+      sink_writes(ev_writer_sink(c->w), "550 unknown flag\n");
+      return 1;				/* completed */
+    }
+  }
+  /* Report what was requested */
+  info("S%x rescan by %s (%s %s)", c->tag, c->who,
+       flag_wait ? "wait" : "",
+       flag_fresh ? "fresh" : "");
+  if(trackdb_rescan_underway()) {
+    if(flag_fresh) {
+      /* We want a fresh rescan but there is already one underway.  Arrange a
+       * callback when it completes and then set off a new one. */
+      c->rescan_wait = flag_wait;
+      trackdb_add_rescanned(start_fresh_rescan, c);
+      if(flag_wait)
+	return 0;
+      else {
+	sink_writes(ev_writer_sink(c->w), "250 rescan queued\n");
+	return 1;
+      }
+    } else {
+      /* There's a rescan underway, and it's acceptable to piggyback on it */
+      if(flag_wait) {
+	/* We want to block until completion. */
+	trackdb_add_rescanned(finished_rescan, c);
+	return 0;
+      } else {
+	/* We don't want to block.  So we just report that things are in
+	 * hand. */
+	sink_writes(ev_writer_sink(c->w), "250 rescan already underway\n");
+	return 1;
+      }
+    }
+  } else {
+    /* No rescan is underway.  fresh is therefore irrelevant. */
+    if(flag_wait) {
+      /* We want to block until completion */
+      trackdb_rescan(c->ev, 1/*check*/, finished_rescan, c);
+      return 0;
+    } else {
+      /* We don't want to block. */
+      trackdb_rescan(c->ev, 1/*check*/, 0, 0);
+      sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
+      return 1;				/* completed */
+    }
+  }
 }
 
 static int c_version(struct conn *c,
@@ -594,9 +656,13 @@ static int c_allfiles(struct conn *c,
 static int c_get(struct conn *c,
 		 char **vec,
 		 int attribute((unused)) nvec) {
-  const char *v;
+  const char *v, *track;
 
-  if(vec[1][0] != '_' && (v = trackdb_get(vec[0], vec[1])))
+  if(!(track = trackdb_resolve(vec[0]))) {
+    sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
+    return 1;
+  }
+  if(vec[1][0] != '_' && (v = trackdb_get(track, vec[1])))
     sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(v));
   else
     sink_writes(ev_writer_sink(c->w), "555 not found\n");
@@ -622,7 +688,13 @@ static int c_length(struct conn *c,
 static int c_set(struct conn *c,
 		 char **vec,
 		 int attribute((unused)) nvec) {
-  if(vec[1][0] != '_' && !trackdb_set(vec[0], vec[1], vec[2]))
+  const char *track;
+
+  if(!(track = trackdb_resolve(vec[0]))) {
+    sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
+    return 1;
+  }
+  if(vec[1][0] != '_' && !trackdb_set(track, vec[1], vec[2]))
     sink_writes(ev_writer_sink(c->w), "250 OK\n");
   else
     sink_writes(ev_writer_sink(c->w), "550 not found\n");
@@ -633,8 +705,13 @@ static int c_prefs(struct conn *c,
 		   char **vec,
 		   int attribute((unused)) nvec) {
   struct kvp *k;
+  const char *track;
 
-  k = trackdb_get_all(vec[0]);
+  if(!(track = trackdb_resolve(vec[0]))) {
+    sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
+    return 1;
+  }
+  k = trackdb_get_all(track);
   sink_writes(ev_writer_sink(c->w), "253 prefs follow\n");
   for(; k; k = k->next)
     if(k->name[0] != '_')		/* omit internal values */
@@ -647,6 +724,7 @@ static int c_prefs(struct conn *c,
 static int c_exists(struct conn *c,
 		    char **vec,
 		    int attribute((unused)) nvec) {
+  /* trackdb_exists() does its own alias checking */
   sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[trackdb_exists(vec[0])]);
   return 1;
 }
@@ -747,7 +825,7 @@ static int c_volume(struct conn *c,
     sink_writes(ev_writer_sink(c->w), "510 Prohibited\n");
     return 1;
   }
-  if(mixer_control(&l, &r, set))
+  if(mixer_control(-1/*as configured*/, &l, &r, set))
     sink_writes(ev_writer_sink(c->w), "550 error accessing mixer\n");
   else {
     sink_printf(ev_writer_sink(c->w), "252 %d %d\n", l, r);
@@ -785,6 +863,7 @@ static int logging_reader_callback(ev_source attribute((unused)) *ev,
       c->w = 0;
     }
     c->r = 0;
+    remove_connection(c);
   }
   return 0;
 }
@@ -795,8 +874,19 @@ static void logclient(const char *msg, void *user) {
   if(!c->w || !c->r) {
     /* This connection has gone up in smoke for some reason */
     eventlog_remove(c->lo);
+    c->lo = 0;
     return;
   }
+  /* user_* messages are restricted */
+  if(!strncmp(msg, "user_", 5)) {
+    /* They are only sent to admin users */
+    if(!(c->rights & RIGHT_ADMIN))
+      return;
+    /* They are not sent over TCP connections unless remote user-management is
+     * enabled */
+    if(!config->remote_userman && !(c->rights & RIGHT__LOCAL))
+      return;
+  }
   sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" %s\n",
 	      (uintmax_t)time(0), msg);
 }
@@ -910,8 +1000,14 @@ static int c_moveafter(struct conn *c,
 static int c_part(struct conn *c,
 		  char **vec,
 		  int attribute((unused)) nvec) {
+  const char *track;
+
+  if(!(track = trackdb_resolve(vec[0]))) {
+    sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
+    return 1;
+  }
   sink_printf(ev_writer_sink(c->w), "252 %s\n",
-	      quoteutf8(trackdb_getpart(vec[0], vec[1], vec[2])));
+	      quoteutf8(trackdb_getpart(track, vec[1], vec[2])));
   return 1;
 }
 
@@ -977,9 +1073,18 @@ static int c_nop(struct conn *c,
 static int c_new(struct conn *c,
 		 char **vec,
 		 int nvec) {
-  char **tracks = trackdb_new(0, nvec > 0 ? atoi(vec[0]) : INT_MAX);
+  int max, n;
+  char **tracks;
 
+  if(nvec > 0)
+    max = atoi(vec[0]);
+  else
+    max = INT_MAX;
+  if(max <= 0 || max > config->new_max)
+    max = config->new_max;
+  tracks = trackdb_new(0, max);
   sink_printf(ev_writer_sink(c->w), "253 New track list follows\n");
+  n = 0;
   while(*tracks) {
     sink_printf(ev_writer_sink(c->w), "%s%s\n",
 		**tracks == '.' ? "." : "", *tracks);
@@ -1066,6 +1171,11 @@ static int c_adduser(struct conn *c,
 		     int nvec) {
   const char *rights;
 
+  if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) {
+    error(0, "S%x: remote adduser", c->tag);
+    sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n");
+    return 1;
+  }
   if(nvec > 2) {
     rights = vec[2];
     if(parse_rights(vec[2], 0, 1)) {
@@ -1085,26 +1195,71 @@ static int c_adduser(struct conn *c,
 static int c_deluser(struct conn *c,
 		     char **vec,
 		     int attribute((unused)) nvec) {
-  if(trackdb_deluser(vec[0]))
+  struct conn *d;
+
+  if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) {
+    error(0, "S%x: remote deluser", c->tag);
+    sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n");
+    return 1;
+  }
+  if(trackdb_deluser(vec[0])) {
     sink_writes(ev_writer_sink(c->w), "550 Cannot delete user\n");
-  else
-    sink_writes(ev_writer_sink(c->w), "250 User deleted\n");
+    return 1;
+  }
+  /* Zap connections belonging to deleted user */
+  for(d = connections; d; d = d->next)
+    if(!strcmp(d->who, vec[0]))
+      d->rights = 0;
+  sink_writes(ev_writer_sink(c->w), "250 User deleted\n");
   return 1;
 }
 
 static int c_edituser(struct conn *c,
 		      char **vec,
 		      int attribute((unused)) nvec) {
+  struct conn *d;
+
+  if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) {
+    error(0, "S%x: remote edituser", c->tag);
+    sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n");
+    return 1;
+  }
   /* RIGHT_ADMIN can do anything; otherwise you can only set your own email
    * address and password. */
   if((c->rights & RIGHT_ADMIN)
      || (!strcmp(c->who, vec[0])
 	 && (!strcmp(vec[1], "email")
 	     || !strcmp(vec[1], "password")))) {
-    if(trackdb_edituserinfo(vec[0], vec[1], vec[2]))
+    if(trackdb_edituserinfo(vec[0], vec[1], vec[2])) {
       sink_writes(ev_writer_sink(c->w), "550 Failed to change setting\n");
-    else
-      sink_writes(ev_writer_sink(c->w), "250 OK\n");
+      return 1;
+    }
+    if(!strcmp(vec[1], "password")) {
+      /* Zap all connections for this user after a password change */
+      for(d = connections; d; d = d->next)
+	if(!strcmp(d->who, vec[0]))
+	  d->rights = 0;
+    } else if(!strcmp(vec[1], "rights")) {
+      /* Update rights for this user */
+      rights_type r;
+
+      if(!parse_rights(vec[2], &r, 1)) {
+        const char *new_rights = rights_string(r);
+	for(d = connections; d; d = d->next) {
+	  if(!strcmp(d->who, vec[0])) {
+            /* Update rights */
+	    d->rights = r;
+            /* Notify any log connections */
+            if(d->lo)
+              sink_printf(ev_writer_sink(d->w),
+                          "%"PRIxMAX" rights_changed %s\n",
+                          (uintmax_t)time(0),
+                          quoteutf8(new_rights));
+          }
+        }
+      }
+    }
+    sink_writes(ev_writer_sink(c->w), "250 OK\n");
   } else {
     error(0, "%s attempted edituser but lacks required rights", c->who);
     sink_writes(ev_writer_sink(c->w), "510 Restricted to administrators\n");
@@ -1118,8 +1273,17 @@ static int c_userinfo(struct conn *c,
   struct kvp *k;
   const char *value;
 
+  /* We allow remote querying of rights so that clients can figure out what
+   * they're allowed to do */
+  if(!config->remote_userman
+     && !(c->rights & RIGHT__LOCAL)
+     && strcmp(vec[1], "rights")) {
+    error(0, "S%x: remote userinfo %s %s", c->tag, vec[0], vec[1]);
+    sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n");
+    return 1;
+  }
   /* RIGHT_ADMIN allows anything; otherwise you can only get your own email
-   * address and righst list. */
+   * address and rights list. */
   if((c->rights & RIGHT_ADMIN)
      || (!strcmp(c->who, vec[0])
 	 && (!strcmp(vec[1], "email")
@@ -1154,6 +1318,16 @@ static int c_users(struct conn *c,
   return 1;				/* completed */
 }
 
+/** @brief Base64 mapping table for confirmation strings
+ *
+ * This is used with generic_to_base64() and generic_base64().  We cannot use
+ * the MIME table as that contains '+' and '=' which get quoted when
+ * URL-encoding.  (The CGI still does the URL encoding but it is desirable to
+ * avoid it being necessary.)
+ */
+static const char confirm_base64_table[] =
+  "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789/.*";
+
 static int c_register(struct conn *c,
 		      char **vec,
 		      int attribute((unused)) nvec) {
@@ -1166,7 +1340,8 @@ static int c_register(struct conn *c,
   buf = xmalloc_noptr(bufsize);
   offset = byte_snprintf(buf, bufsize, "%s;", vec[0]);
   gcry_randomize(buf + offset, CONFIRM_SIZE, GCRY_STRONG_RANDOM);
-  cs = mime_to_base64((uint8_t *)buf, offset + CONFIRM_SIZE);
+  cs = generic_to_base64((uint8_t *)buf, offset + CONFIRM_SIZE,
+			 confirm_base64_table);
   if(trackdb_adduser(vec[0], vec[1], config->default_rights, vec[2], cs))
     sink_writes(ev_writer_sink(c->w), "550 Cannot create user\n");
   else
@@ -1187,7 +1362,7 @@ static int c_confirm(struct conn *c,
     sink_writes(ev_writer_sink(c->w), "530 Authentication failure\n");
     return 1;
   }
-  if(!(user = mime_base64(vec[0], &nuser))
+  if(!(user = generic_base64(vec[0], &nuser, confirm_base64_table))
      || !(sep = memchr(user, ';', nuser))) {
     sink_writes(ev_writer_sink(c->w), "550 Malformed confirmation string\n");
     return 1;
@@ -1208,7 +1383,221 @@ static int c_confirm(struct conn *c,
   }
   return 1;
 }
- 
+
+static int sent_reminder(ev_source attribute((unused)) *ev,
+			 pid_t attribute((unused)) pid,
+			 int status,
+			 const struct rusage attribute((unused)) *rusage,
+			 void *u) {
+  struct conn *const c = u;
+
+  /* Tell the client what went down */ 
+  if(!status) {
+    sink_writes(ev_writer_sink(c->w), "250 OK\n");
+  } else {
+    error(0, "reminder subprocess %s", wstat(status));
+    sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
+  }
+  /* Re-enable this connection */
+  ev_reader_enable(c->r);
+  return 0;
+}
+
+static int c_reminder(struct conn *c,
+		      char **vec,
+		      int attribute((unused)) nvec) {
+  struct kvp *k;
+  const char *password, *email, *text, *encoding, *charset, *content_type;
+  const time_t *last;
+  time_t now;
+  pid_t pid;
+  
+  static hash *last_reminder;
+
+  if(!config->mail_sender) {
+    error(0, "cannot send password reminders because mail_sender not set");
+    sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
+    return 1;
+  }
+  if(!(k = trackdb_getuserinfo(vec[0]))) {
+    error(0, "reminder for user '%s' who does not exist", vec[0]);
+    sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
+    return 1;
+  }
+  if(!(email = kvp_get(k, "email"))
+     || !email_valid(email)) {
+    error(0, "user '%s' has no valid email address", vec[0]);
+    sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
+    return 1;
+  }
+  if(!(password = kvp_get(k, "password"))
+     || !*password) {
+    error(0, "user '%s' has no password", vec[0]);
+    sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
+    return 1;
+  }
+  /* Rate-limit reminders.  This hash is bounded in size by the number of
+   * users.  If this is actually a problem for anyone then we can periodically
+   * clean it. */
+  if(!last_reminder)
+    last_reminder = hash_new(sizeof (time_t));
+  last = hash_find(last_reminder, vec[0]);
+  time(&now);
+  if(last && now < *last + config->reminder_interval) {
+    error(0, "sent a password reminder to '%s' too recently", vec[0]);
+    sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
+    return 1;
+  }
+  /* Send the reminder */
+  /* TODO this should be templatized and to some extent merged with
+   * the code in act_register() */
+  byte_xasprintf((char **)&text,
+"Someone requested that you be sent a reminder of your DisOrder password.\n"
+"Your password is:\n"
+"\n"
+"  %s\n", password);
+  if(!(text = mime_encode_text(text, &charset, &encoding)))
+    fatal(0, "cannot encode email");
+  byte_xasprintf((char **)&content_type, "text/plain;charset=%s",
+		 quote822(charset, 0));
+  pid = sendmail_subprocess("", config->mail_sender, email,
+			    "DisOrder password reminder",
+			    encoding, content_type, text);
+  if(pid < 0) {
+    sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
+    return 1;
+  }
+  hash_add(last_reminder, vec[0], &now, HASH_INSERT_OR_REPLACE);
+  info("sending a passsword reminder to user '%s'", vec[0]);
+  /* We can only continue when the subprocess finishes */
+  ev_child(c->ev, pid, 0, sent_reminder, c);
+  return 0;
+}
+
+static int c_schedule_list(struct conn *c,
+			   char attribute((unused)) **vec,
+			   int attribute((unused)) nvec) {
+  char **ids = schedule_list(0);
+  sink_writes(ev_writer_sink(c->w), "253 ID list follows\n");
+  while(*ids)
+    sink_printf(ev_writer_sink(c->w), "%s\n", *ids++);
+  sink_writes(ev_writer_sink(c->w), ".\n");
+  return 1;				/* completed */
+}
+
+static int c_schedule_get(struct conn *c,
+			  char **vec,
+			  int attribute((unused)) nvec) {
+  struct kvp *actiondata = schedule_get(vec[0]), *k;
+
+  if(!actiondata) {
+    sink_writes(ev_writer_sink(c->w), "555 No such event\n");
+    return 1;				/* completed */
+  }
+  /* Scheduled events are public information.  Anyone with RIGHT_READ can see
+   * them. */
+  sink_writes(ev_writer_sink(c->w), "253 Event information follows\n");
+  for(k = actiondata; k; k = k->next)
+    sink_printf(ev_writer_sink(c->w), " %s %s\n",
+		quoteutf8(k->name),  quoteutf8(k->value));
+  sink_writes(ev_writer_sink(c->w), ".\n");
+  return 1;				/* completed */
+}
+
+static int c_schedule_del(struct conn *c,
+			  char **vec,
+			  int attribute((unused)) nvec) {
+  struct kvp *actiondata = schedule_get(vec[0]);
+
+  if(!actiondata) {
+    sink_writes(ev_writer_sink(c->w), "555 No such event\n");
+    return 1;				/* completed */
+  }
+  /* If you have admin rights you can delete anything.  If you don't then you
+   * can only delete your own scheduled events. */
+  if(!(c->rights & RIGHT_ADMIN)) {
+    const char *who = kvp_get(actiondata, "who");
+
+    if(!who || !c->who || strcmp(who, c->who)) {
+      sink_writes(ev_writer_sink(c->w), "551 Not authorized\n");
+      return 1;				/* completed */
+    }
+  }
+  if(schedule_del(vec[0]))
+    sink_writes(ev_writer_sink(c->w), "550 Could not delete scheduled event\n");
+  else
+    sink_writes(ev_writer_sink(c->w), "250 Deleted\n");
+  return 1;				/* completed */
+}
+
+static int c_schedule_add(struct conn *c,
+			  char **vec,
+			  int nvec) {
+  struct kvp *actiondata = 0;
+  const char *id;
+
+  /* Standard fields */
+  kvp_set(&actiondata, "who", c->who);
+  kvp_set(&actiondata, "when", vec[0]);
+  kvp_set(&actiondata, "priority", vec[1]);
+  kvp_set(&actiondata, "action", vec[2]);
+  /* Action-dependent fields */
+  if(!strcmp(vec[2], "play")) {
+    if(nvec != 4) {
+      sink_writes(ev_writer_sink(c->w), "550 Wrong number of arguments\n");
+      return 1;
+    }
+    if(!trackdb_exists(vec[3])) {
+      sink_writes(ev_writer_sink(c->w), "550 Track is not in database\n");
+      return 1;
+    }
+    kvp_set(&actiondata, "track", vec[3]);
+  } else if(!strcmp(vec[2], "set-global")) {
+    if(nvec < 4 || nvec > 5) {
+      sink_writes(ev_writer_sink(c->w), "550 Wrong number of arguments\n");
+      return 1;
+    }
+    kvp_set(&actiondata, "key", vec[3]);
+    if(nvec > 4)
+      kvp_set(&actiondata, "value", vec[4]);
+  } else {
+    sink_writes(ev_writer_sink(c->w), "550 Unknown action\n");
+    return 1;
+  }
+  /* schedule_add() checks user rights */
+  id = schedule_add(c->ev, actiondata);
+  if(!id)
+    sink_writes(ev_writer_sink(c->w), "550 Cannot add scheduled event\n");
+  else
+    sink_printf(ev_writer_sink(c->w), "252 %s\n", id);
+  return 1;
+}
+
+static int c_adopt(struct conn *c,
+		   char **vec,
+		   int attribute((unused)) nvec) {
+  struct queue_entry *q;
+
+  if(!c->who) {
+    sink_writes(ev_writer_sink(c->w), "550 no identity\n");
+    return 1;
+  }
+  if(!(q = queue_find(vec[0]))) {
+    sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
+    return 1;
+  }
+  if(q->origin != origin_random) {
+    sink_writes(ev_writer_sink(c->w), "550 not a random track\n");
+    return 1;
+  }
+  q->origin = origin_adopted;
+  q->submitter = xstrdup(c->who);
+  eventlog("adopted", q->id, q->submitter, (char *)0);
+  queue_write();
+  sink_writes(ev_writer_sink(c->w), "250 OK\n");
+  return 1;
+}
+
 static const struct command {
   /** @brief Command name */
   const char *name;
@@ -1230,6 +1619,7 @@ static const struct command {
   rights_type rights;
 } commands[] = {
   { "adduser",        2, 3,       c_adduser,        RIGHT_ADMIN|RIGHT__LOCAL },
+  { "adopt",          1, 1,       c_adopt,          RIGHT_PLAY },
   { "allfiles",       0, 2,       c_allfiles,       RIGHT_READ },
   { "confirm",        1, 1,       c_confirm,        0 },
   { "cookie",         1, 1,       c_cookie,         0 },
@@ -1262,12 +1652,17 @@ static const struct command {
   { "recent",         0, 0,       c_recent,         RIGHT_READ },
   { "reconfigure",    0, 0,       c_reconfigure,    RIGHT_ADMIN },
   { "register",       3, 3,       c_register,       RIGHT_REGISTER|RIGHT__LOCAL },
+  { "reminder",       1, 1,       c_reminder,       RIGHT__LOCAL },
   { "remove",         1, 1,       c_remove,         RIGHT_REMOVE__MASK },
-  { "rescan",         0, 0,       c_rescan,         RIGHT_RESCAN },
+  { "rescan",         0, INT_MAX, c_rescan,         RIGHT_RESCAN },
   { "resolve",        1, 1,       c_resolve,        RIGHT_READ },
   { "resume",         0, 0,       c_resume,         RIGHT_PAUSE },
   { "revoke",         0, 0,       c_revoke,         RIGHT_READ },
   { "rtp-address",    0, 0,       c_rtp_address,    0 },
+  { "schedule-add",   3, INT_MAX, c_schedule_add,   RIGHT_READ },
+  { "schedule-del",   1, 1,       c_schedule_del,   RIGHT_READ },
+  { "schedule-get",   1, 1,       c_schedule_get,   RIGHT_READ },
+  { "schedule-list",  0, 0,       c_schedule_list,  RIGHT_READ },
   { "scratch",        0, 1,       c_scratch,        RIGHT_SCRATCH__MASK },
   { "search",         1, 1,       c_search,         RIGHT_READ },
   { "set",            3, 3,       c_set,            RIGHT_PREFS, },
@@ -1309,7 +1704,7 @@ static int command(struct conn *c, char *line) {
     sink_writes(ev_writer_sink(c->w), "500 do what?\n");
     return 1;
   }
-  if((n = TABLE_FIND(commands, struct command, name, vec[0])) < 0)
+  if((n = TABLE_FIND(commands, name, vec[0])) < 0)
     sink_writes(ev_writer_sink(c->w), "500 unknown command\n");
   else {
     if(commands[n].rights
@@ -1385,6 +1780,7 @@ static int reader_callback(ev_source attribute((unused)) *ev,
       ev_writer_close(c->w);
       c->w = 0;
     }
+    remove_connection(c);
   }
   return 0;
 }
@@ -1401,17 +1797,29 @@ static int listen_callback(ev_source *ev,
   D(("server listen_callback fd %d (%s)", fd, l->name));
   nonblock(fd);
   cloexec(fd);
+  c->next = connections;
   c->tag = tags++;
   c->ev = ev;
   c->w = ev_writer_new(ev, fd, writer_error, c,
 		       "client writer");
+  if(!c->w) {
+    error(0, "ev_writer_new for file inbound connection (fd=%d) failed",
+          fd);
+    close(fd);
+    return 0;
+  }
   c->r = ev_reader_new(ev, fd, redirect_reader_callback, reader_error, c,
 		       "client reader");
+  if(!c->r)
+    /* Main reason for failure is the FD is too big and that will already have
+     * been handled */
+    fatal(0, "ev_reader_new for file inbound connection (fd=%d) failed", fd);
   ev_tie(c->r, c->w);
   c->fd = fd;
   c->reader = reader_callback;
   c->l = l;
   c->rights = 0;
+  connections = c;
   gcry_randomize(c->nonce, sizeof c->nonce, GCRY_STRONG_RANDOM);
   sink_printf(ev_writer_sink(c->w), "231 %d %s %s\n",
 	      2,