Actual source code: fhost.c

  1: #define PETSC_DLL
  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(PETSC_HAVE_SYS_UTSNAME_H)
 11: #include <sys/utsname.h>
 12: #endif
 13: #if defined(PETSC_HAVE_WINDOWS_H)
 14: #include <windows.h>
 15: #endif
 16: #if defined(PETSC_HAVE_SYS_SYSTEMINFO_H)
 17: #include <sys/systeminfo.h>
 18: #endif
 19: #if defined(PETSC_HAVE_UNISTD_H)
 20: #include <unistd.h>
 21: #endif
 22: #include "petscfix.h"

 26: /*@C
 27:     PetscGetHostName - Returns the name of the host. This attempts to
 28:     return the entire Internet name. It may not return the same name
 29:     as MPI_Get_processor_name().

 31:     Not Collective

 33:     Input Parameter:
 34: .   nlen - length of name

 36:     Output Parameter:
 37: .   name - contains host name.  Must be long enough to hold the name
 38:            This is the fully qualified name, including the domain.

 40:     Level: developer

 42:     Concepts: machine name
 43:     Concepts: host name

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

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

 73:   /* See if this name includes the domain */
 74:   PetscStrchr(name,'.',&domain);
 75:   if (!domain) {
 76:     size_t  l,ll;
 77:     PetscStrlen(name,&l);
 78:     if (l == nlen-1) 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,"PetscGetHostName:Rejecting domainname, likely is NIS %s\n",name));
 99:                 name[l-1] = 0;
100:               }
101:             }
102:           }
103:         }
104:       }
105:     }
106:   }
107:   return(0);
108: }