/* $Revision: 1.8 $ ** */ #include <stdio.h> #include <sys/types.h> #include <netdb.h> #include "configdata.h" #include "paths.h" #include "clibrary.h" #include "libinn.h" /* ** Get the fully-qualified domain name for this host. */ char * GetFQDN() { static char buff[SMBUF]; struct hostent *hp; char *p; char temp[SMBUF + 2]; /* Return any old results. */ if (buff[0]) return buff; /* Try gethostname. */ if (gethostname(buff, (int)sizeof buff) < 0) return NULL; if (strchr(buff, '.') != NULL) return buff; /* See if DNS (or /etc/hosts) gives us a full domain name. */ if ((hp = gethostbyname(buff)) == NULL) return NULL; if (strchr(hp->h_name, '.') == NULL) { /* Try to force DNS lookup if NIS/whatever gets in the way. */ (void)strncpy(temp, buff, sizeof buff); (void)strcat(temp, "."); hp = gethostbyname(temp); } if (hp != NULL && strchr(hp->h_name, '.') != NULL) { if (strlen(hp->h_name) < sizeof buff - 1) return strcpy(buff, hp->h_name); /* Doesn't fit; make sure we don't return bad data next time. */ buff[0] = '\0'; return hp->h_name; } /* Get the domain name config parameter and append it. */ if ((p = GetFileConfigValue(_CONF_DOMAIN)) == NULL || *p == '\0') return NULL; if (strlen(buff) + 1 + strlen(p) > sizeof buff - 1) /* Doesn't fit. */ return NULL; (void)strcat(buff, "."); (void)strcat(buff, p); return buff; }