From 7f0c7a29fd4d0f0623db522501c2b66eb8ebb94d Mon Sep 17 00:00:00 2001
From: Matt Stancliff <matt@genges.com>
Date: Mon, 7 Apr 2014 11:57:26 -0400
Subject: [PATCH 01/14] Remove possiblity of multiple close on same fd

With all the async connects and disconnects and error handling
going on in hiredis, we need to centralize how we close our fd
and set it so it doesn't get re-closed.  Prior to this commit,
sometimes we'd close(fd), run an async error handler, then
call close(fd) again.

To stop multiple closes, we now set fd to -1 after we free it,
but that requires not passing fd as an independent argument to
functions.

This commit moves all fd usage to c->fd.  Since the context
has a fd field and all functions receive the context, it makes
more sense to use the fd inside of c instead of passing along fd
as an independent argument.

Also, by only using c->fd, we can set c->fd after we close it to
signify we shouldn't re-close the same fd again.

This does change one semi-public interface function redisCheckSocketError()
to only take (context) instead of (context, fd).  A search on github
returned zero occasions of people using redisCheckSocketError()
outside of net.{c,h} in hiredis itself.

Commit inspired by the bug report at:
https://groups.google.com/forum/#!topic/redis-db/mQm46XkIPOY

Thanks go out to Thijs for trying high-frequency reconnects on
a host that isn't there.

Closes #230
---
 async.c |  2 +-
 net.c   | 80 +++++++++++++++++++++++++++++++--------------------------
 net.h   |  2 +-
 3 files changed, 45 insertions(+), 39 deletions(-)

diff --git a/async.c b/async.c
index 923a329..48c40c3 100644
--- a/async.c
+++ b/async.c
@@ -473,7 +473,7 @@ void redisProcessCallbacks(redisAsyncContext *ac) {
 static int __redisAsyncHandleConnect(redisAsyncContext *ac) {
     redisContext *c = &(ac->c);
 
-    if (redisCheckSocketError(c,c->fd) == REDIS_ERR) {
+    if (redisCheckSocketError(c) == REDIS_ERR) {
         /* Try again later when connect(2) is still in progress. */
         if (errno == EINPROGRESS)
             return REDIS_OK;
diff --git a/net.c b/net.c
index 603699c..a591818 100644
--- a/net.c
+++ b/net.c
@@ -54,6 +54,13 @@
 /* Defined in hiredis.c */
 void __redisSetError(redisContext *c, int type, const char *str);
 
+static void redisContextCloseFd(redisContext *c) {
+    if (c && c->fd > 0) {
+        close(c->fd);
+        c->fd = -1;
+    }
+}
+
 static void __redisSetErrorFromErrno(redisContext *c, int type, const char *prefix) {
     char buf[128] = { 0 };
     size_t len = 0;
@@ -64,11 +71,11 @@ static void __redisSetErrorFromErrno(redisContext *c, int type, const char *pref
     __redisSetError(c,type,buf);
 }
 
-static int redisSetReuseAddr(redisContext *c, int fd) {
+static int redisSetReuseAddr(redisContext *c) {
     int on = 1;
-    if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) == -1) {
+    if (setsockopt(c->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) == -1) {
         __redisSetErrorFromErrno(c,REDIS_ERR_IO,NULL);
-        close(fd);
+        redisContextCloseFd(c);
         return REDIS_ERR;
     }
     return REDIS_OK;
@@ -80,23 +87,24 @@ static int redisCreateSocket(redisContext *c, int type) {
         __redisSetErrorFromErrno(c,REDIS_ERR_IO,NULL);
         return REDIS_ERR;
     }
+    c->fd = s;
     if (type == AF_INET) {
-        if (redisSetReuseAddr(c,s) == REDIS_ERR) {
+        if (redisSetReuseAddr(c) == REDIS_ERR) {
             return REDIS_ERR;
         }
     }
-    return s;
+    return REDIS_OK;
 }
 
-static int redisSetBlocking(redisContext *c, int fd, int blocking) {
+static int redisSetBlocking(redisContext *c, int blocking) {
     int flags;
 
     /* Set the socket nonblocking.
      * Note that fcntl(2) for F_GETFL and F_SETFL can't be
      * interrupted by a signal. */
-    if ((flags = fcntl(fd, F_GETFL)) == -1) {
+    if ((flags = fcntl(c->fd, F_GETFL)) == -1) {
         __redisSetErrorFromErrno(c,REDIS_ERR_IO,"fcntl(F_GETFL)");
-        close(fd);
+        redisContextCloseFd(c);
         return REDIS_ERR;
     }
 
@@ -105,9 +113,9 @@ static int redisSetBlocking(redisContext *c, int fd, int blocking) {
     else
         flags |= O_NONBLOCK;
 
-    if (fcntl(fd, F_SETFL, flags) == -1) {
+    if (fcntl(c->fd, F_SETFL, flags) == -1) {
         __redisSetErrorFromErrno(c,REDIS_ERR_IO,"fcntl(F_SETFL)");
-        close(fd);
+        redisContextCloseFd(c);
         return REDIS_ERR;
     }
     return REDIS_OK;
@@ -152,11 +160,11 @@ int redisKeepAlive(redisContext *c, int interval) {
     return REDIS_OK;
 }
 
-static int redisSetTcpNoDelay(redisContext *c, int fd) {
+static int redisSetTcpNoDelay(redisContext *c) {
     int yes = 1;
-    if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &yes, sizeof(yes)) == -1) {
+    if (setsockopt(c->fd, IPPROTO_TCP, TCP_NODELAY, &yes, sizeof(yes)) == -1) {
         __redisSetErrorFromErrno(c,REDIS_ERR_IO,"setsockopt(TCP_NODELAY)");
-        close(fd);
+        redisContextCloseFd(c);
         return REDIS_ERR;
     }
     return REDIS_OK;
@@ -164,19 +172,19 @@ static int redisSetTcpNoDelay(redisContext *c, int fd) {
 
 #define __MAX_MSEC (((LONG_MAX) - 999) / 1000)
 
-static int redisContextWaitReady(redisContext *c, int fd, const struct timeval *timeout) {
+static int redisContextWaitReady(redisContext *c, const struct timeval *timeout) {
     struct pollfd   wfd[1];
     long msec;
 
     msec          = -1;
-    wfd[0].fd     = fd;
+    wfd[0].fd     = c->fd;
     wfd[0].events = POLLOUT;
 
     /* Only use timeout when not NULL. */
     if (timeout != NULL) {
         if (timeout->tv_usec > 1000000 || timeout->tv_sec > __MAX_MSEC) {
             __redisSetErrorFromErrno(c, REDIS_ERR_IO, NULL);
-            close(fd);
+            redisContextCloseFd(c);
             return REDIS_ERR;
         }
 
@@ -192,40 +200,40 @@ static int redisContextWaitReady(redisContext *c, int fd, const struct timeval *
 
         if ((res = poll(wfd, 1, msec)) == -1) {
             __redisSetErrorFromErrno(c, REDIS_ERR_IO, "poll(2)");
-            close(fd);
+            redisContextCloseFd(c);
             return REDIS_ERR;
         } else if (res == 0) {
             errno = ETIMEDOUT;
             __redisSetErrorFromErrno(c,REDIS_ERR_IO,NULL);
-            close(fd);
+            redisContextCloseFd(c);
             return REDIS_ERR;
         }
 
-        if (redisCheckSocketError(c, fd) != REDIS_OK)
+        if (redisCheckSocketError(c) != REDIS_OK)
             return REDIS_ERR;
 
         return REDIS_OK;
     }
 
     __redisSetErrorFromErrno(c,REDIS_ERR_IO,NULL);
-    close(fd);
+    redisContextCloseFd(c);
     return REDIS_ERR;
 }
 
-int redisCheckSocketError(redisContext *c, int fd) {
+int redisCheckSocketError(redisContext *c) {
     int err = 0;
     socklen_t errlen = sizeof(err);
 
-    if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &errlen) == -1) {
+    if (getsockopt(c->fd, SOL_SOCKET, SO_ERROR, &err, &errlen) == -1) {
         __redisSetErrorFromErrno(c,REDIS_ERR_IO,"getsockopt(SO_ERROR)");
-        close(fd);
+        redisContextCloseFd(c);
         return REDIS_ERR;
     }
 
     if (err) {
         errno = err;
         __redisSetErrorFromErrno(c,REDIS_ERR_IO,NULL);
-        close(fd);
+        redisContextCloseFd(c);
         return REDIS_ERR;
     }
 
@@ -271,25 +279,25 @@ int redisContextConnectTcp(redisContext *c, const char *addr, int port, const st
         if ((s = socket(p->ai_family,p->ai_socktype,p->ai_protocol)) == -1)
             continue;
 
-        if (redisSetBlocking(c,s,0) != REDIS_OK)
+        c->fd = s;
+        if (redisSetBlocking(c,0) != REDIS_OK)
             goto error;
         if (connect(s,p->ai_addr,p->ai_addrlen) == -1) {
             if (errno == EHOSTUNREACH) {
-                close(s);
+                redisContextCloseFd(c);
                 continue;
             } else if (errno == EINPROGRESS && !blocking) {
                 /* This is ok. */
             } else {
-                if (redisContextWaitReady(c,s,timeout) != REDIS_OK)
+                if (redisContextWaitReady(c,timeout) != REDIS_OK)
                     goto error;
             }
         }
-        if (blocking && redisSetBlocking(c,s,1) != REDIS_OK)
+        if (blocking && redisSetBlocking(c,1) != REDIS_OK)
             goto error;
-        if (redisSetTcpNoDelay(c,s) != REDIS_OK)
+        if (redisSetTcpNoDelay(c) != REDIS_OK)
             goto error;
 
-        c->fd = s;
         c->flags |= REDIS_CONNECTED;
         rv = REDIS_OK;
         goto end;
@@ -309,31 +317,29 @@ end:
 }
 
 int redisContextConnectUnix(redisContext *c, const char *path, const struct timeval *timeout) {
-    int s;
     int blocking = (c->flags & REDIS_BLOCK);
     struct sockaddr_un sa;
 
-    if ((s = redisCreateSocket(c,AF_LOCAL)) < 0)
+    if (redisCreateSocket(c,AF_LOCAL) < 0)
         return REDIS_ERR;
-    if (redisSetBlocking(c,s,0) != REDIS_OK)
+    if (redisSetBlocking(c,0) != REDIS_OK)
         return REDIS_ERR;
 
     sa.sun_family = AF_LOCAL;
     strncpy(sa.sun_path,path,sizeof(sa.sun_path)-1);
-    if (connect(s, (struct sockaddr*)&sa, sizeof(sa)) == -1) {
+    if (connect(c->fd, (struct sockaddr*)&sa, sizeof(sa)) == -1) {
         if (errno == EINPROGRESS && !blocking) {
             /* This is ok. */
         } else {
-            if (redisContextWaitReady(c,s,timeout) != REDIS_OK)
+            if (redisContextWaitReady(c,timeout) != REDIS_OK)
                 return REDIS_ERR;
         }
     }
 
     /* Reset socket to be blocking after connect(2). */
-    if (blocking && redisSetBlocking(c,s,1) != REDIS_OK)
+    if (blocking && redisSetBlocking(c,1) != REDIS_OK)
         return REDIS_ERR;
 
-    c->fd = s;
     c->flags |= REDIS_CONNECTED;
     return REDIS_OK;
 }
diff --git a/net.h b/net.h
index 94b76f5..af7da11 100644
--- a/net.h
+++ b/net.h
@@ -39,7 +39,7 @@
 #define AF_LOCAL AF_UNIX
 #endif
 
-int redisCheckSocketError(redisContext *c, int fd);
+int redisCheckSocketError(redisContext *c);
 int redisContextSetTimeout(redisContext *c, const struct timeval tv);
 int redisContextConnectTcp(redisContext *c, const char *addr, int port, const struct timeval *timeout);
 int redisContextConnectUnix(redisContext *c, const char *path, const struct timeval *timeout);

From e35266e68fa2f9a292639eb7e499eace226101d0 Mon Sep 17 00:00:00 2001
From: Matt Stancliff <matt@genges.com>
Date: Mon, 7 Apr 2014 15:44:47 -0400
Subject: [PATCH 02/14] Stop redisCheckSocketError from more than checking

redisCheckSocketError should only CheckSocketError and not
close any misbehaving sockets.  If CheckSocketError discovers
a problem, the caller will discover the contest is in ERR
and will start destroying the context (which involves
finalizing all callbacks (which may still be using
fd for something, so we should not close fd until all
callbacks have been told we are failing) and eventually
close the fd in redisFree() immediately before the
context is released).
---
 net.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net.c b/net.c
index a591818..c26f4cc 100644
--- a/net.c
+++ b/net.c
@@ -226,14 +226,12 @@ int redisCheckSocketError(redisContext *c) {
 
     if (getsockopt(c->fd, SOL_SOCKET, SO_ERROR, &err, &errlen) == -1) {
         __redisSetErrorFromErrno(c,REDIS_ERR_IO,"getsockopt(SO_ERROR)");
-        redisContextCloseFd(c);
         return REDIS_ERR;
     }
 
     if (err) {
         errno = err;
         __redisSetErrorFromErrno(c,REDIS_ERR_IO,NULL);
-        redisContextCloseFd(c);
         return REDIS_ERR;
     }
 

From 61eeedbe77a7fef16e44b6fe215a689b7911044e Mon Sep 17 00:00:00 2001
From: Matt Stancliff <matt@genges.com>
Date: Mon, 7 Apr 2014 11:32:16 -0400
Subject: [PATCH 03/14] Fix potential undefined struct read

All the assignments to cb are inside conditionals, so it's
vaguely possible it never gets initialized before we try
to read from it with (cb.fn == NULL).

Condition discovered with scan-build.

Closes #229
---
 async.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/async.c b/async.c
index 48c40c3..f3b57e3 100644
--- a/async.c
+++ b/async.c
@@ -391,7 +391,7 @@ static int __redisGetSubscribeCallback(redisAsyncContext *ac, redisReply *reply,
 
 void redisProcessCallbacks(redisAsyncContext *ac) {
     redisContext *c = &(ac->c);
-    redisCallback cb;
+    redisCallback cb = {NULL, NULL, NULL};
     void *reply = NULL;
     int status;
 

From 37d25a392c9b9468e064a67c504939c9c4ea0031 Mon Sep 17 00:00:00 2001
From: Matt Stancliff <matt@genges.com>
Date: Tue, 8 Apr 2014 13:15:36 -0400
Subject: [PATCH 04/14] Add ability to bind source address on connect

Some environments require binding to specific source addresses instead
of letting the system determine which IP a connection should originate
from.

Closes #233
---
 async.c   |  8 ++++++++
 async.h   |  1 +
 hiredis.c |  8 ++++++++
 hiredis.h |  1 +
 net.c     | 38 ++++++++++++++++++++++++++++++++++++--
 net.h     |  2 ++
 6 files changed, 56 insertions(+), 2 deletions(-)

diff --git a/async.c b/async.c
index f3b57e3..7fd17f2 100644
--- a/async.c
+++ b/async.c
@@ -165,6 +165,14 @@ redisAsyncContext *redisAsyncConnect(const char *ip, int port) {
     return ac;
 }
 
+redisAsyncContext *redisAsyncConnectBind(const char *ip, int port,
+                                         char *source_addr) {
+    redisContext *c = redisConnectBindNonBlock(ip,port,source_addr);
+    redisAsyncContext *ac = redisAsyncInitialize(c);
+    __redisAsyncCopyError(ac);
+    return ac;
+}
+
 redisAsyncContext *redisAsyncConnectUnix(const char *path) {
     redisContext *c;
     redisAsyncContext *ac;
diff --git a/async.h b/async.h
index 268274e..1df2ff0 100644
--- a/async.h
+++ b/async.h
@@ -102,6 +102,7 @@ typedef struct redisAsyncContext {
 
 /* Functions that proxy to hiredis */
 redisAsyncContext *redisAsyncConnect(const char *ip, int port);
+redisAsyncContext *redisAsyncConnectBind(const char *ip, int port,char *source);
 redisAsyncContext *redisAsyncConnectUnix(const char *path);
 int redisAsyncSetConnectCallback(redisAsyncContext *ac, redisConnectCallback *fn);
 int redisAsyncSetDisconnectCallback(redisAsyncContext *ac, redisDisconnectCallback *fn);
diff --git a/hiredis.c b/hiredis.c
index 9b74b5b..beed8e9 100644
--- a/hiredis.c
+++ b/hiredis.c
@@ -1049,6 +1049,14 @@ redisContext *redisConnectNonBlock(const char *ip, int port) {
     return c;
 }
 
+redisContext *redisConnectBindNonBlock(const char *ip, int port,
+                                   char *source_addr) {
+    redisContext *c = redisContextInit();
+    c->flags &= ~REDIS_BLOCK;
+    redisContextConnectBindTcp(c,ip,port,NULL,source_addr);
+    return c;
+}
+
 redisContext *redisConnectUnix(const char *path) {
     redisContext *c;
 
diff --git a/hiredis.h b/hiredis.h
index c65098b..6d24213 100644
--- a/hiredis.h
+++ b/hiredis.h
@@ -175,6 +175,7 @@ typedef struct redisContext {
 redisContext *redisConnect(const char *ip, int port);
 redisContext *redisConnectWithTimeout(const char *ip, int port, const struct timeval tv);
 redisContext *redisConnectNonBlock(const char *ip, int port);
+redisContext *redisConnectBindNonBlock(const char *ip, int port, char *source);
 redisContext *redisConnectUnix(const char *path);
 redisContext *redisConnectUnixWithTimeout(const char *path, const struct timeval tv);
 redisContext *redisConnectUnixNonBlock(const char *path);
diff --git a/net.c b/net.c
index c26f4cc..6cbae48 100644
--- a/net.c
+++ b/net.c
@@ -250,10 +250,12 @@ int redisContextSetTimeout(redisContext *c, const struct timeval tv) {
     return REDIS_OK;
 }
 
-int redisContextConnectTcp(redisContext *c, const char *addr, int port, const struct timeval *timeout) {
+static int _redisContextConnectTcp(redisContext *c, const char *addr, int port,
+                                   const struct timeval *timeout,
+                                   char *source_addr) {
     int s, rv;
     char _port[6];  /* strlen("65535"); */
-    struct addrinfo hints, *servinfo, *p;
+    struct addrinfo hints, *servinfo, *bservinfo, *p, *b;
     int blocking = (c->flags & REDIS_BLOCK);
 
     snprintf(_port, 6, "%d", port);
@@ -280,6 +282,28 @@ int redisContextConnectTcp(redisContext *c, const char *addr, int port, const st
         c->fd = s;
         if (redisSetBlocking(c,0) != REDIS_OK)
             goto error;
+        if (source_addr) {
+            int bound = 0;
+            /* Using getaddrinfo saves us from self-determining IPv4 vs IPv6 */
+            if ((rv = getaddrinfo(source_addr, NULL, &hints, &bservinfo)) != 0) {
+                char buf[128];
+                snprintf(buf,sizeof(buf),"Can't get addr: %s",gai_strerror(rv));
+                __redisSetError(c,REDIS_ERR_OTHER,buf);
+                goto error;
+            }
+            for (b = bservinfo; b != NULL; b = b->ai_next) {
+                if (bind(s,b->ai_addr,b->ai_addrlen) != -1) {
+                    bound = 1;
+                    break;
+                }
+            }
+            if (!bound) {
+                char buf[128];
+                snprintf(buf,sizeof(buf),"Can't bind socket: %s",strerror(errno));
+                __redisSetError(c,REDIS_ERR_OTHER,buf);
+                goto error;
+            }
+        }
         if (connect(s,p->ai_addr,p->ai_addrlen) == -1) {
             if (errno == EHOSTUNREACH) {
                 redisContextCloseFd(c);
@@ -314,6 +338,16 @@ end:
     return rv;  // Need to return REDIS_OK if alright
 }
 
+int redisContextConnectTcp(redisContext *c, const char *addr, int port,
+                           const struct timeval *timeout) {
+    return _redisContextConnectTcp(c, addr, port, timeout, NULL);
+}
+
+int redisContextConnectBindTcp(redisContext *c, const char *addr, int port,
+                               const struct timeval *timeout, char *source_addr) {
+    return _redisContextConnectTcp(c, addr, port, timeout, source_addr);
+}
+
 int redisContextConnectUnix(redisContext *c, const char *path, const struct timeval *timeout) {
     int blocking = (c->flags & REDIS_BLOCK);
     struct sockaddr_un sa;
diff --git a/net.h b/net.h
index af7da11..370a1ff 100644
--- a/net.h
+++ b/net.h
@@ -42,6 +42,8 @@
 int redisCheckSocketError(redisContext *c);
 int redisContextSetTimeout(redisContext *c, const struct timeval tv);
 int redisContextConnectTcp(redisContext *c, const char *addr, int port, const struct timeval *timeout);
+int redisContextConnectBindTcp(redisContext *c, const char *addr, int port,
+                               const struct timeval *timeout, char *source_addr);
 int redisContextConnectUnix(redisContext *c, const char *path, const struct timeval *timeout);
 int redisKeepAlive(redisContext *c, int interval);
 

From ae30d58ff91061e0b0f889f60a9ab2062fa4e9d0 Mon Sep 17 00:00:00 2001
From: Eddy Jansson <eddy@scmcoord.com>
Date: Mon, 24 Feb 2014 11:41:00 +0100
Subject: [PATCH 05/14] Add redisConnectFd() and redisFreeKeepFd()

These allows for easier integration of hiredis with external
code that wants to manage its fds, say for instance in a pool.

Closes #223
---
 hiredis.c | 19 +++++++++++++++++++
 hiredis.h |  2 ++
 test.c    | 31 ++++++++++++++++++++++++++-----
 3 files changed, 47 insertions(+), 5 deletions(-)

diff --git a/hiredis.c b/hiredis.c
index beed8e9..dcb13a5 100644
--- a/hiredis.c
+++ b/hiredis.c
@@ -1010,6 +1010,13 @@ void redisFree(redisContext *c) {
     free(c);
 }
 
+int redisFreeKeepFd(redisContext *c) {
+	int fd = c->fd;
+	c->fd = -1;
+	redisFree(c);
+	return fd;
+}
+
 /* Connect to a Redis instance. On error the field error in the returned
  * context will be set to the return value of the error function.
  * When no set of reply functions is given, the default set will be used. */
@@ -1093,6 +1100,18 @@ redisContext *redisConnectUnixNonBlock(const char *path) {
     return c;
 }
 
+redisContext *redisConnectFd(int fd) {
+    redisContext *c;
+
+    c = redisContextInit();
+    if (c == NULL)
+        return NULL;
+
+    c->fd = fd;
+    c->flags |= REDIS_BLOCK | REDIS_CONNECTED;
+    return c;
+}
+
 /* Set read/write timeout on a blocking socket. */
 int redisSetTimeout(redisContext *c, const struct timeval tv) {
     if (c->flags & REDIS_BLOCK)
diff --git a/hiredis.h b/hiredis.h
index 6d24213..37d5779 100644
--- a/hiredis.h
+++ b/hiredis.h
@@ -179,9 +179,11 @@ redisContext *redisConnectBindNonBlock(const char *ip, int port, char *source);
 redisContext *redisConnectUnix(const char *path);
 redisContext *redisConnectUnixWithTimeout(const char *path, const struct timeval tv);
 redisContext *redisConnectUnixNonBlock(const char *path);
+redisContext *redisConnectFd(int fd);
 int redisSetTimeout(redisContext *c, const struct timeval tv);
 int redisEnableKeepAlive(redisContext *c);
 void redisFree(redisContext *c);
+int redisFreeKeepFd(redisContext *c);
 int redisBufferRead(redisContext *c);
 int redisBufferWrite(redisContext *c, int *done);
 
diff --git a/test.c b/test.c
index b3b806f..75548b1 100644
--- a/test.c
+++ b/test.c
@@ -14,7 +14,8 @@
 
 enum connection_type {
     CONN_TCP,
-    CONN_UNIX
+    CONN_UNIX,
+    CONN_FD
 };
 
 struct config {
@@ -64,7 +65,7 @@ static redisContext *select_database(redisContext *c) {
     return c;
 }
 
-static void disconnect(redisContext *c) {
+static int disconnect(redisContext *c, int keep_fd) {
     redisReply *reply;
 
     /* Make sure we're on DB 9. */
@@ -75,8 +76,11 @@ static void disconnect(redisContext *c) {
     assert(reply != NULL);
     freeReplyObject(reply);
 
-    /* Free the context as well. */
+    /* Free the context as well, but keep the fd if requested. */
+    if (keep_fd)
+        return redisFreeKeepFd(c);
     redisFree(c);
+    return -1;
 }
 
 static redisContext *connect(struct config config) {
@@ -86,6 +90,14 @@ static redisContext *connect(struct config config) {
         c = redisConnect(config.tcp.host, config.tcp.port);
     } else if (config.type == CONN_UNIX) {
         c = redisConnectUnix(config.unix.path);
+    } else if (config.type == CONN_FD) {
+        /* Create a dummy connection just to get an fd to inherit */
+        redisContext *dummy_ctx = redisConnectUnix(config.unix.path);
+        if (dummy_ctx) {
+            int fd = disconnect(dummy_ctx, 1);
+            printf("Connecting to inherited fd %d\n", fd);
+            c = redisConnectFd(fd);
+        }
     } else {
         assert(NULL);
     }
@@ -383,7 +395,7 @@ static void test_blocking_connection(struct config config) {
               strcasecmp(reply->element[1]->str,"pong") == 0);
     freeReplyObject(reply);
 
-    disconnect(c);
+    disconnect(c, 0);
 }
 
 static void test_blocking_io_errors(struct config config) {
@@ -523,7 +535,7 @@ static void test_throughput(struct config config) {
     free(replies);
     printf("\t(%dx LRANGE with 500 elements (pipelined): %.3fs)\n", num, (t2-t1)/1000000.0);
 
-    disconnect(c);
+    disconnect(c, 0);
 }
 
 // static long __test_callback_flags = 0;
@@ -636,6 +648,7 @@ int main(int argc, char **argv) {
         }
     };
     int throughput = 1;
+    int test_inherit_fd = 1;
 
     /* Ignore broken pipe signal (for I/O error tests). */
     signal(SIGPIPE, SIG_IGN);
@@ -654,6 +667,8 @@ int main(int argc, char **argv) {
             cfg.unix.path = argv[0];
         } else if (argc >= 1 && !strcmp(argv[0],"--skip-throughput")) {
             throughput = 0;
+        } else if (argc >= 1 && !strcmp(argv[0],"--skip-inherit-fd")) {
+            test_inherit_fd = 0;
         } else {
             fprintf(stderr, "Invalid argument: %s\n", argv[0]);
             exit(1);
@@ -678,6 +693,12 @@ int main(int argc, char **argv) {
     test_blocking_io_errors(cfg);
     if (throughput) test_throughput(cfg);
 
+    if (test_inherit_fd) {
+        printf("\nTesting against inherited fd (%s):\n", cfg.unix.path);
+        cfg.type = CONN_FD;
+        test_blocking_connection(cfg);
+    }
+
     if (fails) {
         printf("*** %d TESTS FAILED ***\n", fails);
         return 1;

From 303a0421ef0dd347715f4249e1620d04a832d7e9 Mon Sep 17 00:00:00 2001
From: ripcurld00d <boazyeah@gmail.com>
Date: Mon, 29 Jul 2013 19:35:48 +0300
Subject: [PATCH 06/14] Fix "host cannot be resolved test" test

Closes #186
---
 test.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/test.c b/test.c
index 75548b1..e937624 100644
--- a/test.c
+++ b/test.c
@@ -305,6 +305,7 @@ static void test_blocking_connection_errors(void) {
         (strcmp(c->errstr,"Name or service not known") == 0 ||
          strcmp(c->errstr,"Can't resolve: idontexist.local") == 0 ||
          strcmp(c->errstr,"nodename nor servname provided, or not known") == 0 ||
+         strcmp(c->errstr,"No address associated with hostname") == 0 ||
          strcmp(c->errstr,"no address associated with name") == 0));
     redisFree(c);
 

From f20f5ad10264a10d41aa2a47c029fba71820d62a Mon Sep 17 00:00:00 2001
From: John Graham <john@simpli.fi>
Date: Tue, 10 Sep 2013 15:18:16 -0500
Subject: [PATCH 07/14] Libuv: Fix compile warnings and C++ compatability

Closes #189
---
 adapters/libuv.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/adapters/libuv.h b/adapters/libuv.h
index e61d5ca..f959095 100644
--- a/adapters/libuv.h
+++ b/adapters/libuv.h
@@ -3,7 +3,7 @@
 #include <uv.h>
 #include "../hiredis.h"
 #include "../async.h"
-
+#include <string.h>
 
 typedef struct redisLibuvEvents {
   redisAsyncContext* context;
@@ -11,6 +11,7 @@ typedef struct redisLibuvEvents {
   int                events;
 } redisLibuvEvents;
 
+int redisLibuvAttach(redisAsyncContext*, uv_loop_t*);
 
 static void redisLibuvPoll(uv_poll_t* handle, int status, int events) {
   redisLibuvEvents* p = (redisLibuvEvents*)handle->data;
@@ -99,7 +100,7 @@ int redisLibuvAttach(redisAsyncContext* ac, uv_loop_t* loop) {
   ac->ev.delWrite = redisLibuvDelWrite;
   ac->ev.cleanup  = redisLibuvCleanup;
 
-  redisLibuvEvents* p = malloc(sizeof(*p));
+  redisLibuvEvents* p = (redisLibuvEvents*)malloc(sizeof(*p));
 
   if (!p) {
     return REDIS_ERR;

From 66192a0052ec3f9936099a4d2c5512b4b0d89bf0 Mon Sep 17 00:00:00 2001
From: Axel Etcheverry <euskadi31@gmail.com>
Date: Thu, 14 Nov 2013 01:59:35 +0100
Subject: [PATCH 08/14] Add new redisAppendFormatedCommand with tests

Closes #202
---
 hiredis.c |  9 +++++++++
 hiredis.h |  4 ++++
 test.c    | 23 +++++++++++++++++++++++
 3 files changed, 36 insertions(+)

diff --git a/hiredis.c b/hiredis.c
index dcb13a5..b254903 100644
--- a/hiredis.c
+++ b/hiredis.c
@@ -1257,6 +1257,15 @@ int __redisAppendCommand(redisContext *c, char *cmd, size_t len) {
     return REDIS_OK;
 }
 
+int redisAppendFormattedCommand(redisContext *c, char *format, size_t len) {
+
+    if (__redisAppendCommand(c, format, len) != REDIS_OK) {
+        return REDIS_ERR;
+    }
+
+    return REDIS_OK;
+}
+
 int redisvAppendCommand(redisContext *c, const char *format, va_list ap) {
     char *cmd;
     int len;
diff --git a/hiredis.h b/hiredis.h
index 37d5779..05bfc47 100644
--- a/hiredis.h
+++ b/hiredis.h
@@ -194,6 +194,10 @@ int redisBufferWrite(redisContext *c, int *done);
 int redisGetReply(redisContext *c, void **reply);
 int redisGetReplyFromReader(redisContext *c, void **reply);
 
+/* Write a formatted command to the output buffer. Use these functions in blocking mode
+ * to get a pipeline of commands. */
+int redisAppendFormattedCommand(redisContext *c, char *format, size_t len);
+
 /* Write a command to the output buffer. Use these functions in blocking mode
  * to get a pipeline of commands. */
 int redisvAppendCommand(redisContext *c, const char *format, va_list ap);
diff --git a/test.c b/test.c
index e937624..713cc06 100644
--- a/test.c
+++ b/test.c
@@ -217,6 +217,28 @@ static void test_format_commands(void) {
     free(cmd);
 }
 
+static void test_append_formatted_commands(struct config config) {
+    redisContext *c;
+    redisReply *reply;
+    char *cmd;
+    int len;
+
+    c = connect(config);
+
+    test("Append format command: ");
+
+    len = redisFormatCommand(&cmd, "SET foo bar");
+
+    test_cond(redisAppendFormattedCommand(c, cmd, len) == REDIS_OK);
+
+    assert(redisGetReply(c, (void*)&reply) == REDIS_OK);
+
+    free(cmd);
+    freeReplyObject(reply);
+
+    disconnect(c, 0);
+}
+
 static void test_reply_reader(void) {
     redisReader *reader;
     void *reply;
@@ -686,6 +708,7 @@ int main(int argc, char **argv) {
     test_blocking_connection(cfg);
     test_blocking_io_errors(cfg);
     test_invalid_timeout_errors(cfg);
+    test_append_formatted_commands(cfg);
     if (throughput) test_throughput(cfg);
 
     printf("\nTesting against Unix socket connection (%s):\n", cfg.unix.path);

From 4ede1bada156038b83aa2c883fc8bc836a120ac4 Mon Sep 17 00:00:00 2001
From: Charlie Somerville <charlie@charliesomerville.com>
Date: Fri, 6 Dec 2013 14:00:10 +1100
Subject: [PATCH 09/14] Define redisLibuvAttach as static

Closes #206
---
 adapters/libuv.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/adapters/libuv.h b/adapters/libuv.h
index f959095..a1967f4 100644
--- a/adapters/libuv.h
+++ b/adapters/libuv.h
@@ -87,7 +87,7 @@ static void redisLibuvCleanup(void *privdata) {
 }
 
 
-int redisLibuvAttach(redisAsyncContext* ac, uv_loop_t* loop) {
+static int redisLibuvAttach(redisAsyncContext* ac, uv_loop_t* loop) {
   redisContext *c = &(ac->c);
 
   if (ac->ev.data != NULL) {

From 4441fa3513e8b7bcd95d6b03dc56e0d538f264ca Mon Sep 17 00:00:00 2001
From: Patrick TJ McPhee <pmcphee@givex.com>
Date: Tue, 8 Apr 2014 21:11:14 -0400
Subject: [PATCH 10/14] Define _XOPEN_SOURCE for NetBSD

This is backported from
https://github.com/antirez/redis/commit/289942b6259670fe3dcfaffdd0135c27f14c61c0
---
 fmacros.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fmacros.h b/fmacros.h
index 799c12c..9e5fec0 100644
--- a/fmacros.h
+++ b/fmacros.h
@@ -7,7 +7,7 @@
 
 #if defined(__sun__)
 #define _POSIX_C_SOURCE 200112L
-#elif defined(__linux__)
+#elif defined(__linux__) || defined(__OpenBSD__) || defined(__NetBSD__)
 #define _XOPEN_SOURCE 600
 #else
 #define _XOPEN_SOURCE

From 334525359acb3889c7a98b3c92fbb9b1e311a019 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Tue, 8 Apr 2014 21:18:10 -0400
Subject: [PATCH 11/14] Upgrade sds to latest version

SDS is now broken out of Redis into its own project, so include
the latest version from the SDS repo.

This is a backport of the Redis commit doing the same to the bundled hiredis:
https://github.com/antirez/redis/commit/320fa02b9b48ee1c63d88db6344fc0d328e24853
---
 hiredis.c |   4 +-
 sds.c     | 547 +++++++++++++++++++++++++++++++++++++++++-------------
 sds.h     |  39 ++--
 3 files changed, 450 insertions(+), 140 deletions(-)

diff --git a/hiredis.c b/hiredis.c
index b254903..4054de6 100644
--- a/hiredis.c
+++ b/hiredis.c
@@ -650,7 +650,7 @@ int redisReaderGetReply(redisReader *r, void **reply) {
     /* Discard part of the buffer when we've consumed at least 1k, to avoid
      * doing unnecessary calls to memmove() in sds.c. */
     if (r->pos >= 1024) {
-        r->buf = sdsrange(r->buf,r->pos,-1);
+        sdsrange(r->buf,r->pos,-1);
         r->pos = 0;
         r->len = sdslen(r->buf);
     }
@@ -1189,7 +1189,7 @@ int redisBufferWrite(redisContext *c, int *done) {
                 sdsfree(c->obuf);
                 c->obuf = sdsempty();
             } else {
-                c->obuf = sdsrange(c->obuf,nwritten,-1);
+                sdsrange(c->obuf,nwritten,-1);
             }
         }
     }
diff --git a/sds.c b/sds.c
index 998564d..5306f1f 100644
--- a/sds.c
+++ b/sds.c
@@ -1,6 +1,6 @@
-/* SDSLib, A C dynamic strings library
+/* SDS (Simple Dynamic Strings), A C dynamic strings library.
  *
- * Copyright (c) 2006-2010, Salvatore Sanfilippo <antirez at gmail dot com>
+ * Copyright (c) 2006-2014, Salvatore Sanfilippo <antirez at gmail dot com>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -32,83 +32,188 @@
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
+#include <assert.h>
+
 #include "sds.h"
 
-#ifdef SDS_ABORT_ON_OOM
-static void sdsOomAbort(void) {
-    fprintf(stderr,"SDS: Out Of Memory (SDS_ABORT_ON_OOM defined)\n");
-    abort();
-}
-#endif
-
+/* Create a new sds string with the content specified by the 'init' pointer
+ * and 'initlen'.
+ * If NULL is used for 'init' the string is initialized with zero bytes.
+ *
+ * The string is always null-termined (all the sds strings are, always) so
+ * even if you create an sds string with:
+ *
+ * mystring = sdsnewlen("abc",3");
+ *
+ * You can print the string with printf() as there is an implicit \0 at the
+ * end of the string. However the string is binary safe and can contain
+ * \0 characters in the middle, as the length is stored in the sds header. */
 sds sdsnewlen(const void *init, size_t initlen) {
     struct sdshdr *sh;
 
-    sh = malloc(sizeof(struct sdshdr)+initlen+1);
-#ifdef SDS_ABORT_ON_OOM
-    if (sh == NULL) sdsOomAbort();
-#else
+    if (init) {
+        sh = malloc(sizeof *sh+initlen+1);
+    } else {
+        sh = calloc(sizeof *sh+initlen+1,1);
+    }
     if (sh == NULL) return NULL;
-#endif
     sh->len = initlen;
     sh->free = 0;
-    if (initlen) {
-        if (init) memcpy(sh->buf, init, initlen);
-        else memset(sh->buf,0,initlen);
-    }
+    if (initlen && init)
+        memcpy(sh->buf, init, initlen);
     sh->buf[initlen] = '\0';
     return (char*)sh->buf;
 }
 
+/* Create an empty (zero length) sds string. Even in this case the string
+ * always has an implicit null term. */
 sds sdsempty(void) {
     return sdsnewlen("",0);
 }
 
+/* Create a new sds string starting from a null termined C string. */
 sds sdsnew(const char *init) {
     size_t initlen = (init == NULL) ? 0 : strlen(init);
     return sdsnewlen(init, initlen);
 }
 
+/* Duplicate an sds string. */
 sds sdsdup(const sds s) {
     return sdsnewlen(s, sdslen(s));
 }
 
+/* Free an sds string. No operation is performed if 's' is NULL. */
 void sdsfree(sds s) {
     if (s == NULL) return;
     free(s-sizeof(struct sdshdr));
 }
 
+/* Set the sds string length to the length as obtained with strlen(), so
+ * considering as content only up to the first null term character.
+ *
+ * This function is useful when the sds string is hacked manually in some
+ * way, like in the following example:
+ *
+ * s = sdsnew("foobar");
+ * s[2] = '\0';
+ * sdsupdatelen(s);
+ * printf("%d\n", sdslen(s));
+ *
+ * The output will be "2", but if we comment out the call to sdsupdatelen()
+ * the output will be "6" as the string was modified but the logical length
+ * remains 6 bytes. */
 void sdsupdatelen(sds s) {
-    struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr)));
+    struct sdshdr *sh = (void*) (s-sizeof *sh);;
     int reallen = strlen(s);
     sh->free += (sh->len-reallen);
     sh->len = reallen;
 }
 
-static sds sdsMakeRoomFor(sds s, size_t addlen) {
+/* Modify an sds string on-place to make it empty (zero length).
+ * However all the existing buffer is not discarded but set as free space
+ * so that next append operations will not require allocations up to the
+ * number of bytes previously available. */
+void sdsclear(sds s) {
+    struct sdshdr *sh = (void*) (s-sizeof *sh);;
+    sh->free += sh->len;
+    sh->len = 0;
+    sh->buf[0] = '\0';
+}
+
+/* Enlarge the free space at the end of the sds string so that the caller
+ * is sure that after calling this function can overwrite up to addlen
+ * bytes after the end of the string, plus one more byte for nul term.
+ * 
+ * Note: this does not change the *length* of the sds string as returned
+ * by sdslen(), but only the free buffer space we have. */
+sds sdsMakeRoomFor(sds s, size_t addlen) {
     struct sdshdr *sh, *newsh;
     size_t free = sdsavail(s);
     size_t len, newlen;
 
     if (free >= addlen) return s;
     len = sdslen(s);
-    sh = (void*) (s-(sizeof(struct sdshdr)));
-    newlen = (len+addlen)*2;
-    newsh = realloc(sh, sizeof(struct sdshdr)+newlen+1);
-#ifdef SDS_ABORT_ON_OOM
-    if (newsh == NULL) sdsOomAbort();
-#else
+    sh = (void*) (s-sizeof *sh);;
+    newlen = (len+addlen);
+    if (newlen < SDS_MAX_PREALLOC)
+        newlen *= 2;
+    else
+        newlen += SDS_MAX_PREALLOC;
+    newsh = realloc(sh, sizeof *newsh+newlen+1);
     if (newsh == NULL) return NULL;
-#endif
 
     newsh->free = newlen - len;
     return newsh->buf;
 }
 
+/* Reallocate the sds string so that it has no free space at the end. The
+ * contained string remains not altered, but next concatenation operations
+ * will require a reallocation.
+ *
+ * After the call, the passed sds string is no longer valid and all the
+ * references must be substituted with the new pointer returned by the call. */
+sds sdsRemoveFreeSpace(sds s) {
+    struct sdshdr *sh;
+
+    sh = (void*) (s-sizeof *sh);;
+    sh = realloc(sh, sizeof *sh+sh->len+1);
+    sh->free = 0;
+    return sh->buf;
+}
+
+/* Return the total size of the allocation of the specifed sds string,
+ * including:
+ * 1) The sds header before the pointer.
+ * 2) The string.
+ * 3) The free buffer at the end if any.
+ * 4) The implicit null term.
+ */
+size_t sdsAllocSize(sds s) {
+    struct sdshdr *sh = (void*) (s-sizeof *sh);;
+
+    return sizeof(*sh)+sh->len+sh->free+1;
+}
+
+/* Increment the sds length and decrements the left free space at the
+ * end of the string according to 'incr'. Also set the null term
+ * in the new end of the string.
+ *
+ * This function is used in order to fix the string length after the
+ * user calls sdsMakeRoomFor(), writes something after the end of
+ * the current string, and finally needs to set the new length.
+ *
+ * Note: it is possible to use a negative increment in order to
+ * right-trim the string.
+ *
+ * Usage example:
+ *
+ * Using sdsIncrLen() and sdsMakeRoomFor() it is possible to mount the
+ * following schema, to cat bytes coming from the kernel to the end of an
+ * sds string without copying into an intermediate buffer:
+ *
+ * oldlen = sdslen(s);
+ * s = sdsMakeRoomFor(s, BUFFER_SIZE);
+ * nread = read(fd, s+oldlen, BUFFER_SIZE);
+ * ... check for nread <= 0 and handle it ...
+ * sdsIncrLen(s, nread);
+ */
+void sdsIncrLen(sds s, int incr) {
+    struct sdshdr *sh = (void*) (s-sizeof *sh);;
+
+    assert(sh->free >= incr);
+    sh->len += incr;
+    sh->free -= incr;
+    assert(sh->free >= 0);
+    s[sh->len] = '\0';
+}
+
 /* Grow the sds to have the specified length. Bytes that were not part of
- * the original length of the sds will be set to zero. */
+ * the original length of the sds will be set to zero.
+ *
+ * if the specified length is smaller than the current length, no operation
+ * is performed. */
 sds sdsgrowzero(sds s, size_t len) {
-    struct sdshdr *sh = (void*)(s-(sizeof(struct sdshdr)));
+    struct sdshdr *sh = (void*) (s-sizeof *sh);
     size_t totlen, curlen = sh->len;
 
     if (len <= curlen) return s;
@@ -116,7 +221,7 @@ sds sdsgrowzero(sds s, size_t len) {
     if (s == NULL) return NULL;
 
     /* Make sure added region doesn't contain garbage */
-    sh = (void*)(s-(sizeof(struct sdshdr)));
+    sh = (void*)(s-sizeof *sh);
     memset(s+curlen,0,(len-curlen+1)); /* also set trailing \0 byte */
     totlen = sh->len+sh->free;
     sh->len = len;
@@ -124,13 +229,18 @@ sds sdsgrowzero(sds s, size_t len) {
     return s;
 }
 
+/* Append the specified binary-safe string pointed by 't' of 'len' bytes to the
+ * end of the specified sds string 's'.
+ *
+ * After the call, the passed sds string is no longer valid and all the
+ * references must be substituted with the new pointer returned by the call. */
 sds sdscatlen(sds s, const void *t, size_t len) {
     struct sdshdr *sh;
     size_t curlen = sdslen(s);
 
     s = sdsMakeRoomFor(s,len);
     if (s == NULL) return NULL;
-    sh = (void*) (s-(sizeof(struct sdshdr)));
+    sh = (void*) (s-sizeof *sh);;
     memcpy(s+curlen, t, len);
     sh->len = curlen+len;
     sh->free = sh->free-len;
@@ -138,18 +248,32 @@ sds sdscatlen(sds s, const void *t, size_t len) {
     return s;
 }
 
+/* Append the specified null termianted C string to the sds string 's'.
+ *
+ * After the call, the passed sds string is no longer valid and all the
+ * references must be substituted with the new pointer returned by the call. */
 sds sdscat(sds s, const char *t) {
     return sdscatlen(s, t, strlen(t));
 }
 
-sds sdscpylen(sds s, char *t, size_t len) {
-    struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr)));
+/* Append the specified sds 't' to the existing sds 's'.
+ *
+ * After the call, the modified sds string is no longer valid and all the
+ * references must be substituted with the new pointer returned by the call. */
+sds sdscatsds(sds s, const sds t) {
+    return sdscatlen(s, t, sdslen(t));
+}
+
+/* Destructively modify the sds string 's' to hold the specified binary
+ * safe string pointed by 't' of length 'len' bytes. */
+sds sdscpylen(sds s, const char *t, size_t len) {
+    struct sdshdr *sh = (void*) (s-sizeof *sh);;
     size_t totlen = sh->free+sh->len;
 
     if (totlen < len) {
         s = sdsMakeRoomFor(s,len-sh->len);
         if (s == NULL) return NULL;
-        sh = (void*) (s-(sizeof(struct sdshdr)));
+        sh = (void*) (s-sizeof *sh);;
         totlen = sh->free+sh->len;
     }
     memcpy(s, t, len);
@@ -159,10 +283,13 @@ sds sdscpylen(sds s, char *t, size_t len) {
     return s;
 }
 
-sds sdscpy(sds s, char *t) {
+/* Like sdscpylen() but 't' must be a null-termined string so that the length
+ * of the string is obtained with strlen(). */
+sds sdscpy(sds s, const char *t) {
     return sdscpylen(s, t, strlen(t));
 }
 
+/* Like sdscatpritf() but gets va_list instead of being variadic. */
 sds sdscatvprintf(sds s, const char *fmt, va_list ap) {
     va_list cpy;
     char *buf, *t;
@@ -170,15 +297,10 @@ sds sdscatvprintf(sds s, const char *fmt, va_list ap) {
 
     while(1) {
         buf = malloc(buflen);
-#ifdef SDS_ABORT_ON_OOM
-        if (buf == NULL) sdsOomAbort();
-#else
         if (buf == NULL) return NULL;
-#endif
         buf[buflen-2] = '\0';
         va_copy(cpy,ap);
         vsnprintf(buf, buflen, fmt, cpy);
-        va_end(cpy);
         if (buf[buflen-2] != '\0') {
             free(buf);
             buflen *= 2;
@@ -191,6 +313,22 @@ sds sdscatvprintf(sds s, const char *fmt, va_list ap) {
     return t;
 }
 
+/* Append to the sds string 's' a string obtained using printf-alike format
+ * specifier.
+ *
+ * After the call, the modified sds string is no longer valid and all the
+ * references must be substituted with the new pointer returned by the call.
+ *
+ * Example:
+ *
+ * s = sdsempty("Sum is: ");
+ * s = sdscatprintf(s,"%d+%d = %d",a,b,a+b).
+ *
+ * Often you need to create a string from scratch with the printf-alike
+ * format. When this is the need, just use sdsempty() as the target string:
+ *
+ * s = sdscatprintf(sdsempty(), "... your format ...", args);
+ */
 sds sdscatprintf(sds s, const char *fmt, ...) {
     va_list ap;
     char *t;
@@ -200,8 +338,22 @@ sds sdscatprintf(sds s, const char *fmt, ...) {
     return t;
 }
 
-sds sdstrim(sds s, const char *cset) {
-    struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr)));
+/* Remove the part of the string from left and from right composed just of
+ * contiguous characters found in 'cset', that is a null terminted C string.
+ *
+ * After the call, the modified sds string is no longer valid and all the
+ * references must be substituted with the new pointer returned by the call.
+ *
+ * Example:
+ *
+ * s = sdsnew("AA...AA.a.aa.aHelloWorld     :::");
+ * s = sdstrim(s,"A. :");
+ * printf("%s\n", s);
+ *
+ * Output will be just "Hello World".
+ */
+void sdstrim(sds s, const char *cset) {
+    struct sdshdr *sh = (void*) (s-sizeof *sh);;
     char *start, *end, *sp, *ep;
     size_t len;
 
@@ -214,14 +366,29 @@ sds sdstrim(sds s, const char *cset) {
     sh->buf[len] = '\0';
     sh->free = sh->free+(sh->len-len);
     sh->len = len;
-    return s;
 }
 
-sds sdsrange(sds s, int start, int end) {
-    struct sdshdr *sh = (void*) (s-(sizeof(struct sdshdr)));
+/* Turn the string into a smaller (or equal) string containing only the
+ * substring specified by the 'start' and 'end' indexes.
+ *
+ * start and end can be negative, where -1 means the last character of the
+ * string, -2 the penultimate character, and so forth.
+ *
+ * The interval is inclusive, so the start and end characters will be part
+ * of the resulting string.
+ *
+ * The string is modified in-place.
+ *
+ * Example:
+ *
+ * s = sdsnew("Hello World");
+ * sdsrange(s,1,-1); => "ello World"
+ */
+void sdsrange(sds s, int start, int end) {
+    struct sdshdr *sh = (void*) (s-sizeof *sh);;
     size_t newlen, len = sdslen(s);
 
-    if (len == 0) return s;
+    if (len == 0) return;
     if (start < 0) {
         start = len+start;
         if (start < 0) start = 0;
@@ -245,22 +412,34 @@ sds sdsrange(sds s, int start, int end) {
     sh->buf[newlen] = 0;
     sh->free = sh->free+(sh->len-newlen);
     sh->len = newlen;
-    return s;
 }
 
+/* Apply tolower() to every character of the sds string 's'. */
 void sdstolower(sds s) {
     int len = sdslen(s), j;
 
     for (j = 0; j < len; j++) s[j] = tolower(s[j]);
 }
 
+/* Apply toupper() to every character of the sds string 's'. */
 void sdstoupper(sds s) {
     int len = sdslen(s), j;
 
     for (j = 0; j < len; j++) s[j] = toupper(s[j]);
 }
 
-int sdscmp(sds s1, sds s2) {
+/* Compare two sds strings s1 and s2 with memcmp().
+ *
+ * Return value:
+ *
+ *     1 if s1 > s2.
+ *    -1 if s1 < s2.
+ *     0 if s1 and s2 are exactly the same binary string.
+ *
+ * If two strings share exactly the same prefix, but one of the two has
+ * additional characters, the longer string is considered to be greater than
+ * the smaller one. */
+int sdscmp(const sds s1, const sds s2) {
     size_t l1, l2, minlen;
     int cmp;
 
@@ -288,18 +467,15 @@ int sdscmp(sds s1, sds s2) {
  * requires length arguments. sdssplit() is just the
  * same function but for zero-terminated strings.
  */
-sds *sdssplitlen(char *s, int len, char *sep, int seplen, int *count) {
+sds *sdssplitlen(const char *s, int len, const char *sep, int seplen, int *count) {
     int elements = 0, slots = 5, start = 0, j;
+    sds *tokens;
 
-    sds *tokens = malloc(sizeof(sds)*slots);
-#ifdef SDS_ABORT_ON_OOM
-    if (tokens == NULL) sdsOomAbort();
-#endif
+    if (seplen < 1 || len < 0) return NULL;
+
+    tokens = malloc(sizeof(sds)*slots);
     if (tokens == NULL) return NULL;
-    if (seplen < 1 || len < 0) {
-        free(tokens);
-        return NULL;
-    }
+
     if (len == 0) {
         *count = 0;
         return tokens;
@@ -311,25 +487,13 @@ sds *sdssplitlen(char *s, int len, char *sep, int seplen, int *count) {
 
             slots *= 2;
             newtokens = realloc(tokens,sizeof(sds)*slots);
-            if (newtokens == NULL) {
-#ifdef SDS_ABORT_ON_OOM
-                sdsOomAbort();
-#else
-                goto cleanup;
-#endif
-            }
+            if (newtokens == NULL) goto cleanup;
             tokens = newtokens;
         }
         /* search the separator */
         if ((seplen == 1 && *(s+j) == sep[0]) || (memcmp(s+j,sep,seplen) == 0)) {
             tokens[elements] = sdsnewlen(s+start,j-start);
-            if (tokens[elements] == NULL) {
-#ifdef SDS_ABORT_ON_OOM
-                sdsOomAbort();
-#else
-                goto cleanup;
-#endif
-            }
+            if (tokens[elements] == NULL) goto cleanup;
             elements++;
             start = j+seplen;
             j = j+seplen-1; /* skip the separator */
@@ -337,28 +501,22 @@ sds *sdssplitlen(char *s, int len, char *sep, int seplen, int *count) {
     }
     /* Add the final element. We are sure there is room in the tokens array. */
     tokens[elements] = sdsnewlen(s+start,len-start);
-    if (tokens[elements] == NULL) {
-#ifdef SDS_ABORT_ON_OOM
-                sdsOomAbort();
-#else
-                goto cleanup;
-#endif
-    }
+    if (tokens[elements] == NULL) goto cleanup;
     elements++;
     *count = elements;
     return tokens;
 
-#ifndef SDS_ABORT_ON_OOM
 cleanup:
     {
         int i;
         for (i = 0; i < elements; i++) sdsfree(tokens[i]);
         free(tokens);
+        *count = 0;
         return NULL;
     }
-#endif
 }
 
+/* Free the result returned by sdssplitlen(), or do nothing if 'tokens' is NULL. */
 void sdsfreesplitres(sds *tokens, int count) {
     if (!tokens) return;
     while(count--)
@@ -366,6 +524,10 @@ void sdsfreesplitres(sds *tokens, int count) {
     free(tokens);
 }
 
+/* Create an sds string from a long long value. It is much faster than:
+ *
+ * sdscatprintf(sdsempty(),"%lld\n", value);
+ */
 sds sdsfromlonglong(long long value) {
     char buf[32], *p;
     unsigned long long v;
@@ -381,10 +543,14 @@ sds sdsfromlonglong(long long value) {
     return sdsnewlen(p,32-(p-buf));
 }
 
-sds sdscatrepr(sds s, char *p, size_t len) {
+/* Append to the sds string "s" an escaped string representation where
+ * all the non-printable characters (tested with isprint()) are turned into
+ * escapes in the form "\n\r\a...." or "\x<hex-number>".
+ *
+ * After the call, the modified sds string is no longer valid and all the
+ * references must be substituted with the new pointer returned by the call. */
+sds sdscatrepr(sds s, const char *p, size_t len) {
     s = sdscatlen(s,"\"",1);
-    if (s == NULL) return NULL;
-
     while(len--) {
         switch(*p) {
         case '\\':
@@ -404,27 +570,64 @@ sds sdscatrepr(sds s, char *p, size_t len) {
             break;
         }
         p++;
-        if (s == NULL) return NULL;
     }
     return sdscatlen(s,"\"",1);
 }
 
+/* Helper function for sdssplitargs() that returns non zero if 'c'
+ * is a valid hex digit. */
+int is_hex_digit(char c) {
+    return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') ||
+           (c >= 'A' && c <= 'F');
+}
+
+/* Helper function for sdssplitargs() that converts a hex digit into an
+ * integer from 0 to 15 */
+int hex_digit_to_int(char c) {
+    switch(c) {
+    case '0': return 0;
+    case '1': return 1;
+    case '2': return 2;
+    case '3': return 3;
+    case '4': return 4;
+    case '5': return 5;
+    case '6': return 6;
+    case '7': return 7;
+    case '8': return 8;
+    case '9': return 9;
+    case 'a': case 'A': return 10;
+    case 'b': case 'B': return 11;
+    case 'c': case 'C': return 12;
+    case 'd': case 'D': return 13;
+    case 'e': case 'E': return 14;
+    case 'f': case 'F': return 15;
+    default: return 0;
+    }
+}
+
 /* Split a line into arguments, where every argument can be in the
  * following programming-language REPL-alike form:
  *
  * foo bar "newline are supported\n" and "\xff\x00otherstuff"
  *
  * The number of arguments is stored into *argc, and an array
- * of sds is returned. The caller should sdsfree() all the returned
- * strings and finally free() the array itself.
+ * of sds is returned.
+ *
+ * The caller should free the resulting array of sds strings with
+ * sdsfreesplitres().
  *
  * Note that sdscatrepr() is able to convert back a string into
  * a quoted string in the same format sdssplitargs() is able to parse.
+ *
+ * The function returns the allocated tokens on success, even when the
+ * input string is empty, or NULL if the input contains unbalanced
+ * quotes or closed quotes followed by non space characters
+ * as in: "foo"bar or "foo'
  */
-sds *sdssplitargs(char *line, int *argc) {
-    char *p = line;
+sds *sdssplitargs(const char *line, int *argc) {
+    const char *p = line;
     char *current = NULL;
-    char **vector = NULL, **_vector = NULL;
+    char **vector = NULL;
 
     *argc = 0;
     while(1) {
@@ -432,17 +635,24 @@ sds *sdssplitargs(char *line, int *argc) {
         while(*p && isspace(*p)) p++;
         if (*p) {
             /* get a token */
-            int inq=0; /* set to 1 if we are in "quotes" */
+            int inq=0;  /* set to 1 if we are in "quotes" */
+            int insq=0; /* set to 1 if we are in 'single quotes' */
             int done=0;
 
-            if (current == NULL) {
-                current = sdsempty();
-                if (current == NULL) goto err;
-            }
-
+            if (current == NULL) current = sdsempty();
             while(!done) {
                 if (inq) {
-                    if (*p == '\\' && *(p+1)) {
+                    if (*p == '\\' && *(p+1) == 'x' &&
+                                             is_hex_digit(*(p+2)) &&
+                                             is_hex_digit(*(p+3)))
+                    {
+                        unsigned char byte;
+
+                        byte = (hex_digit_to_int(*(p+2))*16)+
+                                hex_digit_to_int(*(p+3));
+                        current = sdscatlen(current,(char*)&byte,1);
+                        p += 3;
+                    } else if (*p == '\\' && *(p+1)) {
                         char c;
 
                         p++;
@@ -456,7 +666,23 @@ sds *sdssplitargs(char *line, int *argc) {
                         }
                         current = sdscatlen(current,&c,1);
                     } else if (*p == '"') {
-                        /* closing quote must be followed by a space */
+                        /* closing quote must be followed by a space or
+                         * nothing at all. */
+                        if (*(p+1) && !isspace(*(p+1))) goto err;
+                        done=1;
+                    } else if (!*p) {
+                        /* unterminated quotes */
+                        goto err;
+                    } else {
+                        current = sdscatlen(current,p,1);
+                    }
+                } else if (insq) {
+                    if (*p == '\\' && *(p+1) == '\'') {
+                        p++;
+                        current = sdscatlen(current,"'",1);
+                    } else if (*p == '\'') {
+                        /* closing quote must be followed by a space or
+                         * nothing at all. */
                         if (*(p+1) && !isspace(*(p+1))) goto err;
                         done=1;
                     } else if (!*p) {
@@ -477,23 +703,24 @@ sds *sdssplitargs(char *line, int *argc) {
                     case '"':
                         inq=1;
                         break;
+                    case '\'':
+                        insq=1;
+                        break;
                     default:
                         current = sdscatlen(current,p,1);
                         break;
                     }
                 }
                 if (*p) p++;
-                if (current == NULL) goto err;
             }
             /* add the token to the vector */
-            _vector = realloc(vector,((*argc)+1)*sizeof(char*));
-            if (_vector == NULL) goto err;
-
-            vector = _vector;
+            vector = realloc(vector,((*argc)+1)*sizeof(char*));
             vector[*argc] = current;
             (*argc)++;
             current = NULL;
         } else {
+            /* Even on empty input string return something not NULL. */
+            if (vector == NULL) vector = malloc(sizeof(void*));
             return vector;
         }
     }
@@ -501,30 +728,67 @@ sds *sdssplitargs(char *line, int *argc) {
 err:
     while((*argc)--)
         sdsfree(vector[*argc]);
-    if (vector != NULL) free(vector);
-    if (current != NULL) sdsfree(current);
+    free(vector);
+    if (current) sdsfree(current);
+    *argc = 0;
     return NULL;
 }
 
+/* Modify the string substituting all the occurrences of the set of
+ * characters specified in the 'from' string to the corresponding character
+ * in the 'to' array.
+ *
+ * For instance: sdsmapchars(mystring, "ho", "01", 2)
+ * will have the effect of turning the string "hello" into "0ell1".
+ *
+ * The function returns the sds string pointer, that is always the same
+ * as the input pointer since no resize is needed. */
+sds sdsmapchars(sds s, const char *from, const char *to, size_t setlen) {
+    size_t j, i, l = sdslen(s);
+
+    for (j = 0; j < l; j++) {
+        for (i = 0; i < setlen; i++) {
+            if (s[j] == from[i]) {
+                s[j] = to[i];
+                break;
+            }
+        }
+    }
+    return s;
+}
+
+/* Join an array of C strings using the specified separator (also a C string).
+ * Returns the result as an sds string. */
+sds sdsjoin(char **argv, int argc, char *sep, size_t seplen) {
+    sds join = sdsempty();
+    int j;
+
+    for (j = 0; j < argc; j++) {
+        join = sdscat(join, argv[j]);
+        if (j != argc-1) join = sdscatlen(join,sep,seplen);
+    }
+    return join;
+}
+
+/* Like sdsjoin, but joins an array of SDS strings. */
+sds sdsjoinsds(sds *argv, int argc, const char *sep, size_t seplen) {
+    sds join = sdsempty();
+    int j;
+
+    for (j = 0; j < argc; j++) {
+        join = sdscatsds(join, argv[j]);
+        if (j != argc-1) join = sdscatlen(join,sep,seplen);
+    }
+    return join;
+}
+
 #ifdef SDS_TEST_MAIN
 #include <stdio.h>
-
-int __failed_tests = 0;
-int __test_num = 0;
-#define test_cond(descr,_c) do { \
-    __test_num++; printf("%d - %s: ", __test_num, descr); \
-    if(_c) printf("PASSED\n"); else {printf("FAILED\n"); __failed_tests++;} \
-} while(0);
-#define test_report() do { \
-    printf("%d tests, %d passed, %d failed\n", __test_num, \
-                    __test_num-__failed_tests, __failed_tests); \
-    if (__failed_tests) { \
-        printf("=== WARNING === We have failed tests here...\n"); \
-    } \
-} while(0);
+#include "testhelp.h"
 
 int main(void) {
     {
+        struct sdshdr *sh;
         sds x = sdsnew("foo"), y;
 
         test_cond("Create a string and obtain the length",
@@ -554,36 +818,43 @@ int main(void) {
             sdslen(x) == 3 && memcmp(x,"123\0",4) ==0)
 
         sdsfree(x);
-        x = sdstrim(sdsnew("xxciaoyyy"),"xy");
+        x = sdsnew("xxciaoyyy");
+        sdstrim(x,"xy");
         test_cond("sdstrim() correctly trims characters",
             sdslen(x) == 4 && memcmp(x,"ciao\0",5) == 0)
 
-        y = sdsrange(sdsdup(x),1,1);
+        y = sdsdup(x);
+        sdsrange(y,1,1);
         test_cond("sdsrange(...,1,1)",
             sdslen(y) == 1 && memcmp(y,"i\0",2) == 0)
 
         sdsfree(y);
-        y = sdsrange(sdsdup(x),1,-1);
+        y = sdsdup(x);
+        sdsrange(y,1,-1);
         test_cond("sdsrange(...,1,-1)",
             sdslen(y) == 3 && memcmp(y,"iao\0",4) == 0)
 
         sdsfree(y);
-        y = sdsrange(sdsdup(x),-2,-1);
+        y = sdsdup(x);
+        sdsrange(y,-2,-1);
         test_cond("sdsrange(...,-2,-1)",
             sdslen(y) == 2 && memcmp(y,"ao\0",3) == 0)
 
         sdsfree(y);
-        y = sdsrange(sdsdup(x),2,1);
+        y = sdsdup(x);
+        sdsrange(y,2,1);
         test_cond("sdsrange(...,2,1)",
             sdslen(y) == 0 && memcmp(y,"\0",1) == 0)
 
         sdsfree(y);
-        y = sdsrange(sdsdup(x),1,100);
+        y = sdsdup(x);
+        sdsrange(y,1,100);
         test_cond("sdsrange(...,1,100)",
             sdslen(y) == 3 && memcmp(y,"iao\0",4) == 0)
 
         sdsfree(y);
-        y = sdsrange(sdsdup(x),100,100);
+        y = sdsdup(x);
+        sdsrange(y,100,100);
         test_cond("sdsrange(...,100,100)",
             sdslen(y) == 0 && memcmp(y,"\0",1) == 0)
 
@@ -604,7 +875,33 @@ int main(void) {
         x = sdsnew("aar");
         y = sdsnew("bar");
         test_cond("sdscmp(bar,bar)", sdscmp(x,y) < 0)
+
+        sdsfree(y);
+        sdsfree(x);
+        x = sdsnewlen("\a\n\0foo\r",7);
+        y = sdscatrepr(sdsempty(),x,sdslen(x));
+        test_cond("sdscatrepr(...data...)",
+            memcmp(y,"\"\\a\\n\\x00foo\\r\"",15) == 0)
+
+        {
+            int oldfree;
+
+            sdsfree(x);
+            x = sdsnew("0");
+            sh = (void*) (x-(sizeof(struct sdshdr)));
+            test_cond("sdsnew() free/len buffers", sh->len == 1 && sh->free == 0);
+            x = sdsMakeRoomFor(x,1);
+            sh = (void*) (x-(sizeof(struct sdshdr)));
+            test_cond("sdsMakeRoomFor()", sh->len == 1 && sh->free > 0);
+            oldfree = sh->free;
+            x[1] = '1';
+            sdsIncrLen(x,1);
+            test_cond("sdsIncrLen() -- content", x[0] == '0' && x[1] == '1');
+            test_cond("sdsIncrLen() -- len", sh->len == 2);
+            test_cond("sdsIncrLen() -- free", sh->free == oldfree-1);
+        }
     }
     test_report()
+    return 0;
 }
 #endif
diff --git a/sds.h b/sds.h
index 94f5871..ab6fc9c 100644
--- a/sds.h
+++ b/sds.h
@@ -1,6 +1,6 @@
-/* SDSLib, A C dynamic strings library
+/* SDS (Simple Dynamic Strings), A C dynamic strings library.
  *
- * Copyright (c) 2006-2010, Salvatore Sanfilippo <antirez at gmail dot com>
+ * Copyright (c) 2006-2014, Salvatore Sanfilippo <antirez at gmail dot com>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,8 @@
 #ifndef __SDS_H
 #define __SDS_H
 
+#define SDS_MAX_PREALLOC (1024*1024)
+
 #include <sys/types.h>
 #include <stdarg.h>
 
@@ -43,12 +45,12 @@ struct sdshdr {
 };
 
 static inline size_t sdslen(const sds s) {
-    struct sdshdr *sh = (void*)(s-(sizeof(struct sdshdr)));
+    struct sdshdr *sh = (void*)(s-sizeof *sh);
     return sh->len;
 }
 
 static inline size_t sdsavail(const sds s) {
-    struct sdshdr *sh = (void*)(s-(sizeof(struct sdshdr)));
+    struct sdshdr *sh = (void*)(s-sizeof *sh);
     return sh->free;
 }
 
@@ -58,12 +60,13 @@ sds sdsempty(void);
 size_t sdslen(const sds s);
 sds sdsdup(const sds s);
 void sdsfree(sds s);
-size_t sdsavail(sds s);
+size_t sdsavail(const sds s);
 sds sdsgrowzero(sds s, size_t len);
 sds sdscatlen(sds s, const void *t, size_t len);
 sds sdscat(sds s, const char *t);
-sds sdscpylen(sds s, char *t, size_t len);
-sds sdscpy(sds s, char *t);
+sds sdscatsds(sds s, const sds t);
+sds sdscpylen(sds s, const char *t, size_t len);
+sds sdscpy(sds s, const char *t);
 
 sds sdscatvprintf(sds s, const char *fmt, va_list ap);
 #ifdef __GNUC__
@@ -73,16 +76,26 @@ sds sdscatprintf(sds s, const char *fmt, ...)
 sds sdscatprintf(sds s, const char *fmt, ...);
 #endif
 
-sds sdstrim(sds s, const char *cset);
-sds sdsrange(sds s, int start, int end);
+void sdstrim(sds s, const char *cset);
+void sdsrange(sds s, int start, int end);
 void sdsupdatelen(sds s);
-int sdscmp(sds s1, sds s2);
-sds *sdssplitlen(char *s, int len, char *sep, int seplen, int *count);
+void sdsclear(sds s);
+int sdscmp(const sds s1, const sds s2);
+sds *sdssplitlen(const char *s, int len, const char *sep, int seplen, int *count);
 void sdsfreesplitres(sds *tokens, int count);
 void sdstolower(sds s);
 void sdstoupper(sds s);
 sds sdsfromlonglong(long long value);
-sds sdscatrepr(sds s, char *p, size_t len);
-sds *sdssplitargs(char *line, int *argc);
+sds sdscatrepr(sds s, const char *p, size_t len);
+sds *sdssplitargs(const char *line, int *argc);
+sds sdsmapchars(sds s, const char *from, const char *to, size_t setlen);
+sds sdsjoin(char **argv, int argc, char *sep, size_t seplen);
+sds sdsjoinsds(sds *argv, int argc, const char *sep, size_t seplen);
+
+/* Low level functions exposed to the user API */
+sds sdsMakeRoomFor(sds s, size_t addlen);
+void sdsIncrLen(sds s, int incr);
+sds sdsRemoveFreeSpace(sds s);
+size_t sdsAllocSize(sds s);
 
 #endif

From 2d66c4814e9a3ab40dfcc114e3eaf55dbeb70d29 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Tue, 8 Apr 2014 21:21:42 -0400
Subject: [PATCH 12/14] Add missing license and copyright for adapters

This is a backport of
https://github.com/antirez/redis/commit/d01aad329c259a7276c448cee6696b04dfa6f8c1
---
 adapters/ae.h       | 30 ++++++++++++++++++++++++++++++
 adapters/libev.h    | 30 ++++++++++++++++++++++++++++++
 adapters/libevent.h | 30 ++++++++++++++++++++++++++++++
 3 files changed, 90 insertions(+)

diff --git a/adapters/ae.h b/adapters/ae.h
index 65235f8..5c551c2 100644
--- a/adapters/ae.h
+++ b/adapters/ae.h
@@ -1,3 +1,33 @@
+/*
+ * Copyright (c) 2010-2011, Pieter Noordhuis <pcnoordhuis at gmail dot com>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of Redis nor the names of its contributors may be used
+ *     to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
 #ifndef __HIREDIS_AE_H__
 #define __HIREDIS_AE_H__
 #include <sys/types.h>
diff --git a/adapters/libev.h b/adapters/libev.h
index 534d743..2bf8d52 100644
--- a/adapters/libev.h
+++ b/adapters/libev.h
@@ -1,3 +1,33 @@
+/*
+ * Copyright (c) 2010-2011, Pieter Noordhuis <pcnoordhuis at gmail dot com>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of Redis nor the names of its contributors may be used
+ *     to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
 #ifndef __HIREDIS_LIBEV_H__
 #define __HIREDIS_LIBEV_H__
 #include <stdlib.h>
diff --git a/adapters/libevent.h b/adapters/libevent.h
index 4055ec0..1c2b271 100644
--- a/adapters/libevent.h
+++ b/adapters/libevent.h
@@ -1,3 +1,33 @@
+/*
+ * Copyright (c) 2010-2011, Pieter Noordhuis <pcnoordhuis at gmail dot com>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of Redis nor the names of its contributors may be used
+ *     to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
 #ifndef __HIREDIS_LIBEVENT_H__
 #define __HIREDIS_LIBEVENT_H__
 #include <event.h>

From 05fb7be3eaa94b50b9d4d81f105d5d872c8591a0 Mon Sep 17 00:00:00 2001
From: Eddy Jansson <eddy@scmcoord.com>
Date: Mon, 24 Feb 2014 14:43:39 +0100
Subject: [PATCH 13/14] Fix Makefile test to use more compatible syntax

The existing way is not compatible with a lot of shells, including most
bash installations, because the echos that generates the configuration
sent to redis-server doesn't expand the escapes. Adding '-e' to the
echo works under bash, but breaks on the Travis CI server.

This is my attempt to find an alternative that works everywhere.
[committer note: it doesn't work under Solaris make, but the Makefile
was already broken under Solaris make.  Solaris users must use gmake.]

Closes #224 and Closes #221
---
 Makefile | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/Makefile b/Makefile
index c8632b4..969115b 100644
--- a/Makefile
+++ b/Makefile
@@ -11,6 +11,18 @@ LIBNAME=libhiredis
 HIREDIS_MAJOR=0
 HIREDIS_MINOR=10
 
+# redis-server configuration used for testing
+REDIS_PORT=56379
+REDIS_SERVER=redis-server
+define REDIS_TEST_CONFIG
+	daemonize yes
+	pidfile /tmp/hiredis-test-redis.pid
+	port $(REDIS_PORT)
+	bind 127.0.0.1
+	unixsocket /tmp/hiredis-test-redis.sock
+endef
+export REDIS_TEST_CONFIG
+
 # Fallback to gcc when $CC is not in $PATH.
 CC:=$(shell sh -c 'type $(CC) >/dev/null 2>/dev/null && echo $(CC) || echo gcc')
 OPTIMIZATION?=-O3
@@ -97,14 +109,8 @@ test: hiredis-test
 	./hiredis-test
 
 check: hiredis-test
-	echo \
-		"daemonize yes\n" \
-		"pidfile /tmp/hiredis-test-redis.pid\n" \
-		"port 56379\n" \
-		"bind 127.0.0.1\n" \
-		"unixsocket /tmp/hiredis-test-redis.sock" \
-			| redis-server -
-	./hiredis-test -h 127.0.0.1 -p 56379 -s /tmp/hiredis-test-redis.sock || \
+	@echo "$$REDIS_TEST_CONFIG" | $(REDIS_SERVER) -
+	./hiredis-test -h 127.0.0.1 -p $(REDIS_PORT) -s /tmp/hiredis-test-redis.sock || \
 			( kill `cat /tmp/hiredis-test-redis.pid` && false )
 	kill `cat /tmp/hiredis-test-redis.pid`
 

From 4369ee5d086967883ee91597540a599e543eacd6 Mon Sep 17 00:00:00 2001
From: Matt Stancliff <matt@genges.com>
Date: Wed, 9 Apr 2014 10:31:37 -0400
Subject: [PATCH 14/14] Fix build under Solaris

Solaris doesn't define the TCP options we try to set.  Let's
ignore those under Solaris.

Closes #207
---
 net.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net.c b/net.c
index 6cbae48..7c787df 100644
--- a/net.c
+++ b/net.c
@@ -130,13 +130,15 @@ int redisKeepAlive(redisContext *c, int interval) {
         return REDIS_ERR;
     }
 
-#ifdef _OSX
     val = interval;
+
+#ifdef _OSX
     if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPALIVE, &val, sizeof(val)) < 0) {
         __redisSetError(c,REDIS_ERR_OTHER,strerror(errno));
         return REDIS_ERR;
     }
 #else
+#ifndef __sun
     val = interval;
     if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof(val)) < 0) {
         __redisSetError(c,REDIS_ERR_OTHER,strerror(errno));
@@ -155,6 +157,7 @@ int redisKeepAlive(redisContext *c, int interval) {
         __redisSetError(c,REDIS_ERR_OTHER,strerror(errno));
         return REDIS_ERR;
     }
+#endif
 #endif
 
     return REDIS_OK;