Actual source code: fhost.c
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: #include <errno.h>
23: /*@C
24: PetscGetHostName - Returns the name of the host. This attempts to
25: return the entire Internet name. It may not return the same name
26: as `MPI_Get_processor_name()`.
28: Not Collective
30: Input Parameter:
31: . nlen - length of name
33: Output Parameter:
34: . name - contains host name. Must be long enough to hold the name
35: This is the fully qualified name, including the domain.
37: Level: developer
39: Fortran Notes:
40: This routine has the format
41: .vb
42: character*(64) name
43: call PetscGetHostName(name,ierr)
44: .ve
46: .seealso: `PetscGetUserName()`, `PetscGetArchType()`
47: @*/
48: PetscErrorCode PetscGetHostName(char name[], size_t nlen)
49: {
50: char *domain = NULL;
51: #if defined(PETSC_HAVE_UNAME) && !defined(PETSC_HAVE_GETCOMPUTERNAME)
52: struct utsname utname;
53: #endif
55: PetscFunctionBegin;
56: #if defined(PETSC_HAVE_GETCOMPUTERNAME)
57: {
58: size_t nnlen = nlen;
60: GetComputerName((LPTSTR)name, (LPDWORD)(&nnlen));
61: }
62: #elif defined(PETSC_HAVE_UNAME)
63: PetscCheck(!uname(&utname), PETSC_COMM_SELF, PETSC_ERR_SYS, "uname() due to \"%s\"", strerror(errno));
64: PetscCall(PetscStrncpy(name, utname.nodename, nlen));
65: #elif defined(PETSC_HAVE_GETHOSTNAME)
66: PetscCheck(!gethostname(name, nlen), PETSC_COMM_SELF, PETSC_ERR_SYS, "gethostname() due to \"%s\"", strerror(errno));
67: #endif
68: /* if there was not enough room then system call will not null terminate name */
69: name[nlen - 1] = 0;
71: /* See if this name includes the domain */
72: PetscCall(PetscStrchr(name, '.', &domain));
73: if (!domain) {
74: size_t l, ll;
76: PetscCall(PetscStrlen(name, &l));
77: if (l == nlen - 1) PetscFunctionReturn(PETSC_SUCCESS);
78: name[l++] = '.';
79: name[l] = 0;
80: #if defined(PETSC_HAVE_GETDOMAINNAME)
81: PetscCheck(!getdomainname(name + l, (int)(nlen - l)), PETSC_COMM_SELF, PETSC_ERR_SYS, "getdomainname() due to \"%s\"", strerror(errno));
82: #endif
83: /* check if domain name is not a dnsdomainname and nuke it */
84: PetscCall(PetscStrlen(name, &ll));
85: if (ll > 4) {
86: const char *suffixes[] = {".edu", ".com", ".net", ".org", ".mil", NULL};
87: PetscInt index;
89: PetscCall(PetscStrendswithwhich(name, suffixes, &index));
90: if (!suffixes[index]) {
91: PetscCall(PetscInfo(NULL, "Rejecting domainname, likely is NIS %s\n", name));
92: name[l - 1] = 0;
93: }
94: }
95: }
96: PetscFunctionReturn(PETSC_SUCCESS);
97: }