Actual source code: fhost.c
1: #define PETSC_DLL
2: /*
3: Code for manipulating files.
4: */
5: #include petscsys.h
6: #if defined(PETSC_HAVE_STDLIB_H)
7: #include <stdlib.h>
8: #endif
9: #if defined(PETSC_HAVE_SYS_UTSNAME_H)
10: #include <sys/utsname.h>
11: #endif
12: #if defined(PETSC_HAVE_WINDOWS_H)
13: #include <windows.h>
14: #endif
15: #if defined(PETSC_HAVE_SYS_SYSTEMINFO_H)
16: #include <sys/systeminfo.h>
17: #endif
18: #if defined(PETSC_HAVE_UNISTD_H)
19: #include <unistd.h>
20: #endif
21: #if defined(PETSC_HAVE_NETDB_H)
22: #include <netdb.h>
23: #endif
27: /*@C
28: PetscGetHostName - Returns the name of the host. This attempts to
29: return the entire Internet name. It may not return the same name
30: as MPI_Get_processor_name().
32: Not Collective
34: Input Parameter:
35: . nlen - length of name
37: Output Parameter:
38: . name - contains host name. Must be long enough to hold the name
39: This is the fully qualified name, including the domain.
41: Level: developer
43: Concepts: machine name
44: Concepts: host name
46: .seealso: PetscGetUserName()
47: @*/
48: PetscErrorCode PetscGetHostName(char name[],size_t nlen)
49: {
50: char *domain;
52: PetscTruth flag;
53: #if defined(PETSC_HAVE_UNAME) && !defined(PETSC_HAVE_GETCOMPUTERNAME)
54: struct utsname utname;
55: #endif
58: #if defined(PETSC_HAVE_GETCOMPUTERNAME)
59: {
60: size_t nnlen = nlen;
61: GetComputerName((LPTSTR)name,(LPDWORD)(&nnlen));
62: }
63: #elif defined(PETSC_HAVE_UNAME)
64: uname(&utname);
65: PetscStrncpy(name,utname.nodename,nlen);
66: #elif defined(PETSC_HAVE_GETHOSTNAME)
67: gethostname(name,nlen);
68: #elif defined(PETSC_HAVE_SYSINFO_3ARG)
69: sysinfo(SI_HOSTNAME,name,nlen);
70: #endif
71: /* if there was not enough room then system call will not null terminate name */
72: name[nlen-1] = 0;
74: /* See if this name includes the domain */
75: PetscStrchr(name,'.',&domain);
76: if (!domain) {
77: size_t l,ll;
78: PetscStrlen(name,&l);
79: if (l == nlen-1) return(0);
80: name[l++] = '.';
81: #if defined(PETSC_HAVE_SYSINFO_3ARG)
82: sysinfo(SI_SRPC_DOMAIN,name+l,nlen-l);
83: #elif defined(PETSC_HAVE_GETDOMAINNAME)
84: getdomainname(name+l,nlen - l);
85: #endif
86: /* check if domain name is not a dnsdomainname and nuke it */
87: PetscStrlen(name,&ll);
88: if (ll > 4) {
89: PetscStrcmp(name + ll - 4,".edu",&flag);
90: if (!flag) {
91: PetscStrcmp(name + ll - 4,".com",&flag);
92: if (!flag) {
93: PetscStrcmp(name + ll - 4,".net",&flag);
94: if (!flag) {
95: PetscStrcmp(name + ll - 4,".org",&flag);
96: if (!flag) {
97: PetscStrcmp(name + ll - 4,".mil",&flag);
98: if (!flag) {
99: PetscInfo1(0,"Rejecting domainname, likely is NIS %s\n",name);
100: name[l-1] = 0;
101: }
102: }
103: }
104: }
105: }
106: }
107: }
108: return(0);
109: }