treewide: cleanup malloc calls

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

diff --git a/src/daemon/common.c b/src/daemon/common.c
index 8f22011..2f6da95 100644 (file)
--- a/src/daemon/common.c
+++ b/src/daemon/common.c
@@ -48,6 +48,8 @@
 #include <sys/types.h>
 #include <netdb.h>
 
+#include <poll.h>
+
 #if HAVE_NETINET_IN_H
 # include <netinet/in.h>
 #endif
@@ -142,7 +144,7 @@ char *sstrdup (const char *s)
        /* Do not use `strdup' here, because it's not specified in POSIX. It's
         * ``only'' an XSI extension. */
        sz = strlen (s) + 1;
-       r = (char *) malloc (sizeof (char) * sz);
+       r = malloc (sz);
        if (r == NULL)
        {
                ERROR ("sstrdup: Out of memory.");
@@ -269,9 +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)
        {
@@ -393,7 +409,7 @@ int escape_string (char *buffer, size_t buffer_size)
   if (buffer_size < 3)
     return (EINVAL);
 
-  temp = (char *) malloc (buffer_size);
+  temp = malloc (buffer_size);
   if (temp == NULL)
     return (ENOMEM);
   memset (temp, 0, buffer_size);
@@ -1153,6 +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;