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: }