libXau-1.0.7源码

/* Copyright 1988, 1998 The Open Group Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of The Open Group shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from The Open Group. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include <X11/Xauth.h> #include <X11/Xos.h> #ifdef XTHREADS #include <X11/Xthreads.h> #endif #ifdef hpux #define X_INCLUDE_NETDB_H #define XOS_USE_NO_LOCKING #include <X11/Xos_r.h> #endif static int binaryEqual (_Xconst char *a, _Xconst char *b, int len) { while (len--) if (*a++ != *b++) return 0; return 1; } Xauth * XauGetBestAuthByAddr ( #if NeedWidePrototypes unsigned int family, unsigned int address_length, #else unsigned short family, unsigned short address_length, #endif _Xconst char* address, #if NeedWidePrototypes unsigned int number_length, #else unsigned short number_length, #endif _Xconst char* number, int types_length, char** types, _Xconst int* type_lengths) { FILE *auth_file; char *auth_name; Xauth *entry; Xauth *best; int best_type; int type; #ifdef hpux char *fully_qual_address; unsigned short fully_qual_address_length; #endif auth_name = XauFileName (); if (!auth_name) return NULL; if (access (auth_name, R_OK) != 0) /* checks REAL id */ return NULL; auth_file = fopen (auth_name, "rb"); if (!auth_file) return NULL; #ifdef hpux if (family == FamilyLocal) { #ifdef XTHREADS_NEEDS_BYNAMEPARAMS _Xgethostbynameparams hparams; #endif struct hostent *hostp; /* make sure we try fully-qualified hostname */ if ((hostp = _XGethostbyname(address,hparams)) != NULL) { fully_qual_address = hostp->h_name; fully_qual_address_length = strlen(fully_qual_address); } else { fully_qual_address = NULL; fully_qual_address_length = 0; } } #endif /* hpux */ best = NULL; best_type = types_length; for (;;) { entry = XauReadAuth (auth_file); if (!entry) break; /* * Match when: * either family or entry->family are FamilyWild or * family and entry->family are the same and * address and entry->address are the same * and * either number or entry->number are empty or * number and entry->number are the same * and * either name or entry->name are empty or * name and entry->name are the same */ if ((family == FamilyWild || entry->family == FamilyWild || (entry->family == family && ((address_length == entry->address_length && binaryEqual (entry->address, address, (int)address_length)) #ifdef hpux || (family == FamilyLocal && fully_qual_address_length == entry->address_length && binaryEqual (entry->address, fully_qual_address, (int) fully_qual_address_length)) #endif ))) && (number_length == 0 || entry->number_length == 0 || (number_length == entry->number_length && binaryEqual (entry->number, number, (int)number_length)))) { if (best_type == 0) { best = entry; break; } for (type = 0; type < best_type; type++) if (type_lengths[type] == entry->name_length && !(strncmp (types[type], entry->name, entry->name_length))) { break; } if (type < best_type) { if (best) XauDisposeAuth (best); best = entry; best_type = type; if (type == 0) break; continue; } } XauDisposeAuth (entry); } (void) fclose (auth_file); return best; }