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POGetting "Address already in use" error using Unix socket
 

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  1. POGetting "Address already in use" error using Unix socket
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    <p>Writing the C source below using Unix local sockets I got an error about the address already in use. After having checked <code>man 7 Unix</code> for further informations I tried to create a sub-folder where executing my program (obviously modifying the <code>sun_path</code> field on the current folder) but the error was ever the same.</p> <p>Is there someone able to help me?</p> <p>Source code:</p> <pre><code>#include &lt;stdio.h&gt; #include &lt;stdlib.h&gt; #include &lt;string.h&gt; #include &lt;sys/socket.h&gt; #include &lt;sys/types.h&gt; #include &lt;sys/un.h&gt; #include &lt;unistd.h&gt; #include &lt;errno.h&gt; #define MAXLEN 128 int main (int argc, char *argv[]){ struct sockaddr_un server; int serverfd, clientfd; socklen_t addrsize = sizeof(struct sockaddr_un); char buff[MAXLEN], *path; if (argc &lt; 2){ printf("Error: %s [MESSAGE]\n", argv[0]); return 1; } if ((serverfd = socket(AF_UNIX, SOCK_STREAM, 0)) &lt; 0){ printf("Error \"%s\" in socket()\n", strerror(errno)); exit(1); } puts("socket()"); server.sun_family = AF_UNIX; path = strcpy(server.sun_path, "/home/myhome/Dropbox/Sources/C/sub"); printf("[DEBUG]Address bound at %s\n", path); if ((bind(serverfd, (struct sockaddr*)&amp;server, addrsize)) &lt; 0){ printf("Error \"%s\" in bind()\n", strerror(errno)); exit(1); } puts("bind()"); if ((listen(serverfd, 1)) &lt; 0){ printf("Error \"%s\" in listen()\n", strerror(errno)); exit(1); } if ((clientfd = accept(serverfd, NULL, &amp;addrsize)) &lt; 0){ printf("Error \"%s\" in accept()\n", strerror(errno)); exit(1); } write(clientfd, argv[1], strlen(argv[1])); read(clientfd, buff, sizeof(buff)); puts(buff); close(clientfd); close(serverfd); return 0; } </code></pre>
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    1. COplease post the exact error message you are seeing.
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      1. USxaxxon
    2. COThe error displayed is this: "Error "Address already in use" in bind()"
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      1. USAcsor
    3. COhey, DO NOT use a dropbox filesystem for AF_UNIX. It really needs to be a local filesystem. You can google around for why. Here there be dragons, so until you try it on a local filesystem and reproduce it, I don't think anyone can help you.
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