2.3.2/src/vde_switch/sockutils.c

   1 /* Copyright 2005 Renzo Davoli - VDE-2
   2  * Mattia Belletti (C) 2004.
   3  * Licensed under the GPLv2
   4  */
   5
   6 #include <stdio.h>
   7 #include <fcntl.h>
   8 #include <errno.h>
   9 #include <string.h>
  10 #include <unistd.h>
  11 #include <stdlib.h>
  12 #include <stdint.h>
  13 #include <libgen.h>
  14 #include <syslog.h>
  15 #include <sys/types.h>
  16 #include <sys/ioctl.h>
  17 #include <sys/socket.h>
  18 #include <sys/un.h>
  19 #include "switch.h"
  20 #include "consmgmt.h"
  21
  22 #include <config.h>
  23 #include <vde.h>
  24 #include <vdecommon.h>
  25
  26 /* check to see if given unix socket is still in use; if it isn't, remove the
  27  *  * socket from the file system */
  28 int still_used(struct sockaddr_un *sun)
  29 {
  30         int test_fd, ret = 1;
  31
  32         if((test_fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0){
  33                 printlog(LOG_ERR,"socket %s",strerror(errno));
  34                 return(1);
  35         }
  36         if(connect(test_fd, (struct sockaddr *) sun, sizeof(*sun)) < 0){
  37                 if(errno == ECONNREFUSED){
  38                         if(unlink(sun->sun_path) < 0){
  39                                 printlog(LOG_ERR,"Failed to removed unused socket '%s': %s",
  40                                                 sun->sun_path,strerror(errno));
  41                         }
  42                         ret = 0;
  43                 }
  44                 else printlog(LOG_ERR,"connect %s",strerror(errno));
  45         }
  46         close(test_fd);
  47         return(ret);
  48 }
  49