1: /*$Id: fhost.c,v 1.49 2001/03/23 23:20:45 balay Exp $*/
  2: /*
  3:       Code for manipulating files.
  4: */
 5:  #include petsc.h
 6:  #include petscsys.h
  7: #if defined(PETSC_HAVE_STDLIB_H)
  8: #include <stdlib.h>
  9: #endif
 10: #if !defined(PARCH_win32)
 11: #include <sys/utsname.h>
 12: #endif
 13: #if defined(PARCH_win32)
 14: #include <windows.h>
 15: #include <io.h>
 16: #include <direct.h>
 17: #endif
 18: #if defined (PARCH_win32_gnu)
 19: #include <windows.h>
 20: #endif
 21: #if defined(PETSC_HAVE_SYS_SYSTEMINFO_H)
 22: #include <sys/systeminfo.h>
 23: #endif
 24: #if defined(PETSC_HAVE_UNISTD_H)
 25: #include <unistd.h>
 26: #endif
 27: #include "petscfix.h"

 29: #undef __FUNCT__  
 31: /*@C
 32:     PetscGetHostName - Returns the name of the host. This attempts to
 33:     return the entire Internet name. It may not return the same name
 34:     as MPI_Get_processor_name().

 36:     Not Collective

 38:     Input Parameter:
 39: .   nlen - length of name

 41:     Output Parameter:
 42: .   name - contains host name.  Must be long enough to hold the name
 43:            This is the fully qualified name, including the domain.

 45:     Level: developer

 47:     Concepts: machine name
 48:     Concepts: host name

 50: .seealso: PetscGetUserName()
 51: @*/
 52: int PetscGetHostName(char name[],int nlen)
 53: {
 54:   char           *domain;
 55:   int            ierr;
 56:   PetscTruth     flag;
 57: #if defined(PETSC_HAVE_UNAME)
 58:   struct utsname utname;
 59: #endif


 63: #if defined(PARCH_win32) || defined(PARCH_win32_gnu)
 64:   GetComputerName((LPTSTR)name,(LPDWORD)(&nlen));
 65: #elif defined(PETSC_HAVE_UNAME)
 66:   uname(&utname);
 67:   PetscStrncpy(name,utname.nodename,nlen);
 68: #elif defined(PETSC_HAVE_GETHOSTNAME)
 69:   gethostname(name,nlen);
 70: #elif defined(PETSC_HAVE_SYSINFO_3ARG)
 71:   sysinfo(SI_HOSTNAME,name,nlen);
 72: #endif
 73:   /* See if this name includes the domain */
 74:   PetscStrchr(name,'.',&domain);
 75:   if (!domain) {
 76:     int  l,ll;
 77:     PetscStrlen(name,&l);
 78:     if (l == nlen) {name[nlen-1] = 0; return(0);}
 79:     name[l++] = '.';
 80: #if defined(PETSC_HAVE_SYSINFO_3ARG)
 81:     sysinfo(SI_SRPC_DOMAIN,name+l,nlen-l);
 82: #elif defined(PETSC_HAVE_GETDOMAINNAME)
 83:     getdomainname(name+l,nlen - l);
 84: #endif
 85:     /* check if domain name is not a dnsdomainname and nuke it */
 86:     PetscStrlen(name,&ll);
 87:     if (ll > 4) {
 88:       PetscStrcmp(name + ll - 4,".edu",&flag);
 89:       if (!flag) {
 90:         PetscStrcmp(name + ll - 4,".com",&flag);
 91:         if (!flag) {
 92:           PetscStrcmp(name + ll - 4,".net",&flag);
 93:           if (!flag) {
 94:             PetscStrcmp(name + ll - 4,".org",&flag);
 95:             if (!flag) {
 96:               PetscStrcmp(name + ll - 4,".mil",&flag);
 97:               if (!flag) {
 98:                 PetscLogInfo(0,"Rejecting domainname, likely is NIS %sn",name);
 99:                 name[l-1] = 0;
100:               }
101:             }
102:           }
103:         }
104:       }
105:     }
106:   }
107:   name[nlen-1] = 0;
108:   return(0);
109: }