Actual source code: fhost.c

      1: #define PETSC_DESIRE_FEATURE_TEST_MACROS /* for getdomainname() */
      2: /*
      3:       Code for manipulating files.
      4: */
      5: #include <petscsys.h>
      6: #if defined(PETSC_HAVE_SYS_UTSNAME_H)
      7: #include <sys/utsname.h>
      8: #endif
      9: #if defined(PETSC_HAVE_WINDOWS_H)
     10: #include <windows.h>
     11: #endif
     12: #if defined(PETSC_HAVE_SYS_SYSTEMINFO_H)
     13: #include <sys/systeminfo.h>
     14: #endif
     15: #if defined(PETSC_HAVE_UNISTD_H)
     16: #include <unistd.h>
     17: #endif
     18: #if defined(PETSC_HAVE_NETDB_H)
     19: #include <netdb.h>
     20: #endif

     22: /*@C
     23:     PetscGetHostName - Returns the name of the host. This attempts to
     24:     return the entire Internet name. It may not return the same name
     25:     as MPI_Get_processor_name().

     27:     Not Collective

     29:     Input Parameter:
     30: .   nlen - length of name

     32:     Output Parameter:
     33: .   name - contains host name.  Must be long enough to hold the name
     34:            This is the fully qualified name, including the domain.

     36:     Level: developer

     38:    Fortran Version:
     39:    In Fortran this routine has the format

     41: $       character*(64) name
     42: $       call PetscGetHostName(name,ierr)

     44: .seealso: PetscGetUserName(),PetscGetArchType()
     45: @*/
     46: PetscErrorCode  PetscGetHostName(char name[],size_t nlen)
     47: {
     48:   char           *domain;
     49: #if defined(PETSC_HAVE_UNAME) && !defined(PETSC_HAVE_GETCOMPUTERNAME)
     50:   struct utsname utname;
     51: #endif

     53: #if defined(PETSC_HAVE_GETCOMPUTERNAME)
     54:   {
     55:     size_t nnlen = nlen;
     56:     GetComputerName((LPTSTR)name,(LPDWORD)(&nnlen));
     57:   }
     58: #elif defined(PETSC_HAVE_UNAME)
     59:   uname(&utname);
     60:   PetscStrncpy(name,utname.nodename,nlen);
     61: #elif defined(PETSC_HAVE_GETHOSTNAME)
     62:   gethostname(name,nlen);
     63: #elif defined(PETSC_HAVE_SYSINFO_3ARG)
     64:   sysinfo(SI_HOSTNAME,name,nlen);
     65: #endif
     66:   /* if there was not enough room then system call will not null terminate name */
     67:   name[nlen-1] = 0;

     69:   /* See if this name includes the domain */
     70:   PetscStrchr(name,'.',&domain);
     71:   if (!domain) {
     72:     size_t l,ll;
     73:     PetscStrlen(name,&l);
     74:     if (l == nlen-1) return 0;
     75:     name[l++] = '.';
     76:     name[l]   = 0;
     77: #if defined(PETSC_HAVE_SYSINFO_3ARG)
     78:     sysinfo(SI_SRPC_DOMAIN,name+l,nlen-l);
     79: #elif defined(PETSC_HAVE_GETDOMAINNAME)
     81: #endif
     82:     /* check if domain name is not a dnsdomainname and nuke it */
     83:     PetscStrlen(name,&ll);
     84:     if (ll > 4) {
     85:       const char *suffixes[] = {".edu",".com",".net",".org",".mil",NULL};
     86:       PetscInt   index;
     87:       PetscStrendswithwhich(name,suffixes,&index);
     88:       if (!suffixes[index]) {
     89:         PetscInfo(NULL,"Rejecting domainname, likely is NIS %s\n",name);
     90:         name[l-1] = 0;
     91:       }
     92:     }
     93:   }
     94:   return 0;
     95: }