X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/566145652162e02433c1cd461bf9b5e312abbc40..812b526d127c6657e571db8b33a58137af6709cd:/server/server.c

diff --git a/server/server.c b/server/server.c
index 79ac7b1..320cbb1 100644
--- a/server/server.c
+++ b/server/server.c
@@ -2,75 +2,21 @@
  * This file is part of DisOrder.
  * 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 "hash.h"
-#include "mime.h"
-#include "sendmail.h"
-#include "wstat.h"
+#include "disorder-server.h"
 
 #ifndef NONCE_SIZE
 # define NONCE_SIZE 16
@@ -93,6 +39,34 @@ struct listener {
   int pf;
 };
 
+struct conn;
+
+/** @brief Signature for line reader callback
+ * @param c Connection
+ * @param line Line
+ * @return 0 if incomplete, 1 if complete
+ *
+ * @p line is 0-terminated and excludes the newline.  It points into the
+ * input buffer so will become invalid shortly.
+ */
+typedef int line_reader_type(struct conn *c,
+                             char *line);
+
+/** @brief Signature for with-body command callbacks
+ * @param c Connection
+ * @param body List of body lines
+ * @param nbody Number of body lines
+ * @param u As passed to fetch_body()
+ * @return 0 to suspend input, 1 if complete
+ *
+ * The body strings are allocated (so survive indefinitely) and don't include
+ * newlines.
+ */
+typedef int body_callback_type(struct conn *c,
+                               char **body,
+                               int nbody,
+                               void *u);
+
 /** @brief One client connection */
 struct conn {
   /** @brief Read commands from here */
@@ -124,6 +98,20 @@ struct conn {
   rights_type rights;
   /** @brief Next connection */
   struct conn *next;
+  /** @brief True if pending rescan had 'wait' set */
+  int rescan_wait;
+  /** @brief Playlist that this connection locks */
+  const char *locked_playlist;
+  /** @brief When that playlist was locked */
+  time_t locked_when;
+  /** @brief Line reader function */
+  line_reader_type *line_reader;
+  /** @brief Called when command body has been read */
+  body_callback_type *body_callback;
+  /** @brief Passed to @c body_callback */
+  void *body_u;
+  /** @brief Accumulating body */
+  struct vector body[1];
 };
 
 /** @brief Linked list of connections */
@@ -135,6 +123,15 @@ static int reader_callback(ev_source *ev,
 			   size_t bytes,
 			   int eof,
 			   void *u);
+static int c_playlist_set_body(struct conn *c,
+                               char **body,
+                               int nbody,
+                               void *u);
+static int fetch_body(struct conn *c,
+                      body_callback_type body_callback,
+                      void *u);
+static int body_line(struct conn *c, char *line);
+static int command(struct conn *c, char *line);
 
 static const char *noyes[] = { "no", "yes" };
 
@@ -240,7 +237,7 @@ 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
@@ -355,13 +352,107 @@ 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, 1/*check*/);
-  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,
@@ -614,9 +705,13 @@ 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");
@@ -642,7 +737,13 @@ 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");
@@ -653,8 +754,13 @@ 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 */
@@ -667,6 +773,7 @@ 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;
 }
@@ -767,7 +874,7 @@ 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);
@@ -816,8 +923,19 @@ 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);
 }
@@ -931,8 +1049,14 @@ 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;
 }
 
@@ -949,21 +1073,25 @@ static int c_resolve(struct conn *c,
   return 1;
 }
 
-static int c_tags(struct conn *c,
-		  char attribute((unused)) **vec,
-		  int attribute((unused)) nvec) {
-  char **tags = trackdb_alltags();
-  
-  sink_printf(ev_writer_sink(c->w), "253 Tag list follows\n");
-  while(*tags) {
+static int list_response(struct conn *c,
+                         const char *reply,
+                         char **list) {
+  sink_printf(ev_writer_sink(c->w), "253 %s\n", reply);
+  while(*list) {
     sink_printf(ev_writer_sink(c->w), "%s%s\n",
-		**tags == '.' ? "." : "", *tags);
-    ++tags;
+		**list == '.' ? "." : "", *list);
+    ++list;
   }
   sink_writes(ev_writer_sink(c->w), ".\n");
   return 1;				/* completed */
 }
 
+static int c_tags(struct conn *c,
+		  char attribute((unused)) **vec,
+		  int attribute((unused)) nvec) {
+  return list_response(c, "Tag list follows", trackdb_alltags());
+}
+
 static int c_set_global(struct conn *c,
 			char **vec,
 			int attribute((unused)) nvec) {
@@ -1096,6 +1224,11 @@ 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)) {
@@ -1117,6 +1250,11 @@ static int c_deluser(struct conn *c,
 		     int attribute((unused)) nvec) {
   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");
     return 1;
@@ -1134,6 +1272,11 @@ static int c_edituser(struct conn *c,
 		      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)
@@ -1153,10 +1296,21 @@ static int c_edituser(struct conn *c,
       /* Update rights for this user */
       rights_type r;
 
-      if(parse_rights(vec[2], &r, 1))
-	for(d = connections; d; d = d->next)
-	  if(!strcmp(d->who, vec[0]))
+      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 {
@@ -1172,8 +1326,17 @@ 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")
@@ -1195,17 +1358,7 @@ static int c_userinfo(struct conn *c,
 static int c_users(struct conn *c,
 		   char attribute((unused)) **vec,
 		   int attribute((unused)) nvec) {
-  /* TODO de-dupe with c_tags */
-  char **users = trackdb_listusers();
-
-  sink_writes(ev_writer_sink(c->w), "253 User list follows\n");
-  while(*users) {
-    sink_printf(ev_writer_sink(c->w), "%s%s\n",
-		**users == '.' ? "." : "", *users);
-    ++users;
-  }
-  sink_writes(ev_writer_sink(c->w), ".\n");
-  return 1;				/* completed */
+  return list_response(c, "User list follows", trackdb_listusers());
 }
 
 /** @brief Base64 mapping table for confirmation strings
@@ -1315,7 +1468,7 @@ static int c_reminder(struct conn *c,
     return 1;
   }
   if(!(email = kvp_get(k, "email"))
-     || !strchr(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;
@@ -1364,6 +1517,276 @@ static int c_reminder(struct conn *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 int playlist_response(struct conn *c,
+                             int err) {
+  switch(err) {
+  case 0:
+    assert(!"cannot cope with success");
+  case EACCES:
+    sink_writes(ev_writer_sink(c->w), "550 Access denied\n");
+    break;
+  case EINVAL:
+    sink_writes(ev_writer_sink(c->w), "550 Invalid playlist name\n");
+    break;
+  case ENOENT:
+    sink_writes(ev_writer_sink(c->w), "555 No such playlist\n");
+    break;
+  default:
+    sink_writes(ev_writer_sink(c->w), "550 Error accessing playlist\n");
+    break;
+  }
+  return 1;
+}
+
+static int c_playlist_get(struct conn *c,
+			  char **vec,
+			  int attribute((unused)) nvec) {
+  char **tracks;
+  int err;
+
+  if(!(err = trackdb_playlist_get(vec[0], c->who, &tracks, 0, 0)))
+    return list_response(c, "Playlist contents follows", tracks);
+  else
+    return playlist_response(c, err);
+}
+
+static int c_playlist_set(struct conn *c,
+			  char **vec,
+			  int attribute((unused)) nvec) {
+  return fetch_body(c, c_playlist_set_body, vec[0]);
+}
+
+static int c_playlist_set_body(struct conn *c,
+                               char **body,
+                               int nbody,
+                               void *u) {
+  const char *playlist = u;
+  int err;
+
+  if(!c->locked_playlist
+     || strcmp(playlist, c->locked_playlist)) {
+    sink_writes(ev_writer_sink(c->w), "550 Playlist is not locked\n");
+    return 1;
+  }
+  if(!(err = trackdb_playlist_set(playlist, c->who,
+                                  body, nbody, 0))) {
+    sink_printf(ev_writer_sink(c->w), "250 OK\n");
+    return 1;
+  } else
+    return playlist_response(c, err);
+}
+
+static int c_playlist_get_share(struct conn *c,
+                                char **vec,
+                                int attribute((unused)) nvec) {
+  char *share;
+  int err;
+
+  if(!(err = trackdb_playlist_get(vec[0], c->who, 0, 0, &share))) {
+    sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(share));
+    return 1;
+  } else
+    return playlist_response(c, err);
+}
+
+static int c_playlist_set_share(struct conn *c,
+                                char **vec,
+                                int attribute((unused)) nvec) {
+  int err;
+
+  if(!(err = trackdb_playlist_set(vec[0], c->who, 0, 0, vec[1]))) {
+    sink_printf(ev_writer_sink(c->w), "250 OK\n");
+    return 1;
+  } else
+    return playlist_response(c, err);
+}
+
+static int c_playlists(struct conn *c,
+                       char attribute((unused)) **vec,
+                       int attribute((unused)) nvec) {
+  char **p;
+
+  trackdb_playlist_list(c->who, &p, 0);
+  return list_response(c, "List of playlists follows", p);
+}
+
+static int c_playlist_delete(struct conn *c,
+                             char **vec,
+                             int attribute((unused)) nvec) {
+  int err;
+  
+  if(!(err = trackdb_playlist_delete(vec[0], c->who))) {
+    sink_writes(ev_writer_sink(c->w), "250 OK\n");
+    return 1;
+  } else
+    return playlist_response(c, err);
+}
+
+static int c_playlist_lock(struct conn *c,
+                           char **vec,
+                           int attribute((unused)) nvec) {
+  int err;
+  struct conn *cc;
+
+  /* Check we're allowed to modify this playlist */
+  if((err = trackdb_playlist_set(vec[0], c->who, 0, 0, 0)))
+    return playlist_response(c, err);
+  /* If we hold a lock don't allow a new one */
+  if(c->locked_playlist) {
+    sink_writes(ev_writer_sink(c->w), "550 Already holding a lock\n");
+    return 1;
+  }
+  /* See if some other connection locks the same playlist */
+  for(cc = connections; cc; cc = cc->next)
+    if(cc->locked_playlist && !strcmp(cc->locked_playlist, vec[0]))
+      break;
+  if(cc) {
+    /* TODO: implement config->playlist_lock_timeout */
+    sink_writes(ev_writer_sink(c->w), "550 Already locked\n");
+    return 1;
+  }
+  c->locked_playlist = xstrdup(vec[0]);
+  time(&c->locked_when);
+  sink_writes(ev_writer_sink(c->w), "250 Acquired lock\n");
+  return 1;
+}
+
+static int c_playlist_unlock(struct conn *c,
+                             char attribute((unused)) **vec,
+                             int attribute((unused)) nvec) {
+  if(!c->locked_playlist) {
+    sink_writes(ev_writer_sink(c->w), "550 Not holding a lock\n");
+    return 1;
+  }
+  c->locked_playlist = 0;
+  sink_writes(ev_writer_sink(c->w), "250 Released lock\n");
+  return 1;
+}
+
 static const struct command {
   /** @brief Command name */
   const char *name;
@@ -1385,6 +1808,7 @@ 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 },
@@ -1409,6 +1833,14 @@ static const struct command {
   { "pause",          0, 0,       c_pause,          RIGHT_PAUSE },
   { "play",           1, 1,       c_play,           RIGHT_PLAY },
   { "playing",        0, 0,       c_playing,        RIGHT_READ },
+  { "playlist-delete",    1, 1,   c_playlist_delete,    RIGHT_PLAY },
+  { "playlist-get",       1, 1,   c_playlist_get,       RIGHT_READ },
+  { "playlist-get-share", 1, 1,   c_playlist_get_share, RIGHT_READ },
+  { "playlist-lock",      1, 1,   c_playlist_lock,      RIGHT_PLAY },
+  { "playlist-set",       1, 1,   c_playlist_set,       RIGHT_PLAY },
+  { "playlist-set-share", 2, 2,   c_playlist_set_share, RIGHT_PLAY },
+  { "playlist-unlock",    0, 0,   c_playlist_unlock,    RIGHT_PLAY },
+  { "playlists",          0, 0,   c_playlists,          RIGHT_READ },
   { "prefs",          1, 1,       c_prefs,          RIGHT_READ },
   { "queue",          0, 0,       c_queue,          RIGHT_READ },
   { "random-disable", 0, 0,       c_random_disable, RIGHT_GLOBAL_PREFS },
@@ -1419,11 +1851,15 @@ static const struct command {
   { "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, },
@@ -1440,13 +1876,58 @@ static const struct command {
   { "volume",         0, 2,       c_volume,         RIGHT_READ|RIGHT_VOLUME }
 };
 
+/** @brief Fetch a command body
+ * @param c Connection
+ * @param body_callback Called with body
+ * @param u Passed to body_callback
+ * @return 1
+ */
+static int fetch_body(struct conn *c,
+                      body_callback_type body_callback,
+                      void *u) {
+  assert(c->line_reader == command);
+  c->line_reader = body_line;
+  c->body_callback = body_callback;
+  c->body_u = u;
+  vector_init(c->body);
+  return 1;
+}
+
+/** @brief @ref line_reader_type callback for command body lines
+ * @param c Connection
+ * @param line Line
+ * @return 1 if complete, 0 if incomplete
+ *
+ * Called from reader_callback().
+ */
+static int body_line(struct conn *c,
+                     char *line) {
+  if(*line == '.') {
+    ++line;
+    if(!*line) {
+      /* That's the lot */
+      c->line_reader = command;
+      vector_terminate(c->body);
+      return c->body_callback(c, c->body->vec, c->body->nvec, c->body_u);
+    }
+  }
+  vector_append(c->body, xstrdup(line));
+  return 1;                             /* completed */
+}
+
 static void command_error(const char *msg, void *u) {
   struct conn *c = u;
 
   sink_printf(ev_writer_sink(c->w), "500 parse error: %s\n", msg);
 }
 
-/* process a command.  Return 1 if complete, 0 if incomplete. */
+/** @brief @ref line_reader_type callback for commands
+ * @param c Connection
+ * @param line Line
+ * @return 1 if complete, 0 if incomplete
+ *
+ * Called from reader_callback().
+ */
 static int command(struct conn *c, char *line) {
   char **vec;
   int nvec, n;
@@ -1465,7 +1946,7 @@ 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
@@ -1517,7 +1998,7 @@ static int reader_callback(ev_source attribute((unused)) *ev,
   while((eol = memchr(ptr, '\n', bytes))) {
     *eol++ = 0;
     ev_reader_consume(reader, eol - (char *)ptr);
-    complete = command(c, ptr);
+    complete = c->line_reader(c, ptr);  /* usually command() */
     bytes -= (eol - (char *)ptr);
     ptr = eol;
     if(!complete) {
@@ -1558,17 +2039,30 @@ 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;
+  c->line_reader = command;
+  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,