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 21 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()`. 26 27 Not Collective 28 29 Input Parameter: 30 . nlen - length of name 31 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. 35 36 Level: developer 37 38 Fortran Note: 39 This routine has the format 40 .vb 41 character*(64) name 42 call PetscGetHostName(name,ierr) 43 .ve 44 45 .seealso: `PetscGetUserName()`, `PetscGetArchType()` 46 @*/ 47 PetscErrorCode PetscGetHostName(char name[], size_t nlen) 48 { 49 char *domain = NULL; 50 #if defined(PETSC_HAVE_UNAME) && !defined(PETSC_HAVE_GETCOMPUTERNAME) 51 struct utsname utname; 52 #endif 53 54 PetscFunctionBegin; 55 #if defined(PETSC_HAVE_GETCOMPUTERNAME) 56 { 57 size_t nnlen = nlen; 58 GetComputerName((LPTSTR)name, (LPDWORD)(&nnlen)); 59 } 60 #elif defined(PETSC_HAVE_UNAME) 61 uname(&utname); 62 PetscCall(PetscStrncpy(name, utname.nodename, nlen)); 63 #elif defined(PETSC_HAVE_GETHOSTNAME) 64 gethostname(name, nlen); 65 #endif 66 /* if there was not enough room then system call will not null terminate name */ 67 name[nlen - 1] = 0; 68 69 /* See if this name includes the domain */ 70 PetscCall(PetscStrchr(name, '.', &domain)); 71 if (!domain) { 72 size_t l, ll; 73 PetscCall(PetscStrlen(name, &l)); 74 if (l == nlen - 1) PetscFunctionReturn(PETSC_SUCCESS); 75 name[l++] = '.'; 76 name[l] = 0; 77 #if defined(PETSC_HAVE_GETDOMAINNAME) 78 PetscCheck(!getdomainname(name + l, nlen - l), PETSC_COMM_SELF, PETSC_ERR_SYS, "getdomainname()"); 79 #endif 80 /* check if domain name is not a dnsdomainname and nuke it */ 81 PetscCall(PetscStrlen(name, &ll)); 82 if (ll > 4) { 83 const char *suffixes[] = {".edu", ".com", ".net", ".org", ".mil", NULL}; 84 PetscInt index; 85 PetscCall(PetscStrendswithwhich(name, suffixes, &index)); 86 if (!suffixes[index]) { 87 PetscCall(PetscInfo(NULL, "Rejecting domainname, likely is NIS %s\n", name)); 88 name[l - 1] = 0; 89 } 90 } 91 } 92 PetscFunctionReturn(PETSC_SUCCESS); 93 } 94