Merge branch 'collectd-5.5'

[collectd.git] / src / daemon / common.c

diff --git a/src/daemon/common.c b/src/daemon/common.c
index 068b999..dd4f9b1 100644 (file)
--- a/src/daemon/common.c
+++ b/src/daemon/common.c
@@ -46,9 +46,10 @@
 
 /* for getaddrinfo */
 #include <sys/types.h>
-#include <sys/socket.h>
 #include <netdb.h>
 
+#include <poll.h>
+
 #if HAVE_NETINET_IN_H
 # include <netinet/in.h>
 #endif
@@ -270,9 +271,23 @@ ssize_t swrite (int fd, const void *buf, size_t count)
        const char *ptr;
        size_t      nleft;
        ssize_t     status;
+       struct      pollfd pfd;
 
        ptr   = (const char *) buf;
        nleft = count;
+       
+       /* checking for closed peer connection */
+       pfd.fd = fd;
+       pfd.events = POLLIN | POLLHUP;
+       pfd.revents = 0;
+       if (poll(&pfd, 1, 0) > 0) {
+               char buffer[32];
+               if (recv(fd, buffer, sizeof(buffer), MSG_PEEK | MSG_DONTWAIT) == 0) {
+                       // if recv returns zero (even though poll() said there is data to be read),
+                       // that means the connection has been closed
+                       return -1;
+               }
+       }
 
        while (nleft > 0)
        {
@@ -356,7 +371,7 @@ int strjoin (char *buffer, size_t buffer_size,
        }
 
        assert (buffer[buffer_size - 1] == 0);
-       return (strlen (buffer));
+       return ((int) strlen (buffer));
 }
 
 int strsubstitute (char *str, char c_from, char c_to)
@@ -1154,6 +1169,9 @@ int parse_values (char *buffer, value_list_t *vl, const data_set_t *ds)
        char *ptr;
        char *saveptr;
 
+       if ((buffer == NULL) || (vl == NULL) || (ds == NULL))
+               return EINVAL;
+
        i = 0;
        dummy = buffer;
        saveptr = NULL;