rosapps/applications/net/ncftp/sio/UBind.c

   1 #include "syshdrs.h"
   2
   3 #if !defined(NO_UNIX_DOMAIN_SOCKETS)
   4
   5 int
   6 UBind(int sockfd, const char *const astr, const int nTries, const int reuseFlag)
   7 {
   8         unsigned int i;
   9         int on;
  10         int onsize;
  11         struct sockaddr_un localAddr;
  12         int ualen;
  13
  14         ualen = MakeSockAddrUn(&localAddr, astr);
  15         (void) unlink(localAddr.sun_path);
  16
  17         if (reuseFlag != kReUseAddrNo) {
  18                 /* This is mostly so you can quit the server and re-run it
  19                  * again right away.  If you don't do this, the OS may complain
  20                  * that the address is still in use.
  21                  */
  22                 on = 1;
  23                 onsize = (int) sizeof(on);
  24                 (void) setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
  25                         (char *) &on, onsize);
  26         }
  27
  28         for (i=1; ; i++) {
  29                 /* Try binding a few times, in case we get Address in Use
  30                  * errors.
  31                  */
  32                 if (bind(sockfd, (struct sockaddr *) &localAddr, ualen) == 0) {
  33                         break;
  34                 }
  35                 if (i == (unsigned int) nTries) {
  36                         return (-1);
  37                 }
  38                 /* Give the OS time to clean up the old socket,
  39                  * and then try again.
  40                  */
  41                 sleep(i * 3);
  42         }
  43
  44         return (0);
  45 }       /* UBind */
  46
  47
  48
  49
  50 int
  51 UListen(int sfd, int backlog)
  52 {
  53         return (listen(sfd, backlog));
  54 }       /* UListen */
  55
  56 #endif
  57