/* $XConsortium: authutil.c /main/16 1996/09/28 16:33:00 rws $ */ /* $XFree86: xc/lib/ICE/authutil.c,v 3.2 1997/01/05 11:51:53 dawes Exp $ */ /****************************************************************************** Copyright (c) 1993 X Consortium Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: 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 X CONSORTIUM 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 X Consortium 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 X Consortium. Author: Ralph Mor, X Consortium ******************************************************************************/ #include #include "KDE-ICE/ICElibint.h" #include #include #include #include #include #include #include #if defined(X_NOT_STDC_ENV) && !defined(__EMX__) extern int errno; extern long time (); extern char *getenv(); #define Time_t long #else #include #define Time_t time_t #ifdef __EMX__ extern char* getenv(const char*); #define link rename #endif #endif #ifndef X_NOT_POSIX #include #else #ifndef _WIN32 extern unsigned sleep (); #else #define link rename #endif #endif static Status read_short (FILE *file, unsigned short *shortp); static Status read_string (FILE *file, char **stringp); static Status read_counted_string (FILE *file, unsigned short *countp, char **stringp); static Status write_short (FILE *file, unsigned short s); static Status write_string (FILE *file, char *string); static Status write_counted_string (FILE *file, unsigned short count, char *string); /* * The following routines are for manipulating the .ICEauthority file * These are utility functions - they are not part of the standard * ICE library specification. */ char * IceAuthFileName () { static char baseICEauthority[] = "ICEauthority"; #ifdef _WIN32 static char pathSep[] = "\\"; #else static char pathSep[] = "/"; #endif char fileSep[2]; char *name; static char *buf; static int bsize; int size; #if defined(_WIN32) || defined(__EMX__) char dir[128]; #endif name = getenv ("ICEAUTHORITY"); if (name && name[0]) return (name); name = getenv("XDG_RUNTIME_DIR"); if (name && name[0]) { char *testBuf; strcpy(fileSep, ""); size = strlen(name) + strlen(pathSep) + strlen(fileSep) + strlen(baseICEauthority) + 1; testBuf = malloc(size); if (!testBuf) { return (NULL); } snprintf(testBuf, size, "%s%s%s%s", name, pathSep, fileSep, baseICEauthority); if (access(testBuf, F_OK)) { name = NULL; } free(testBuf); } if (!name || !name[0]) { name = getenv ("HOME"); strcpy(fileSep, "."); #ifdef _WIN32 if (!name || !name[0]) { if(name = getenv ("HOMEDRIVE")) { strcpy (dir, name); if(name = getenv ("HOMEPATH")) { strcat (dir, name); } name = dir; } else { name = getenv ("USERPROFILE"); } } #endif #ifdef __EMX__ if (!name || !name[0]) { strcpy (dir,"c:"); name = dir; } #endif } if (!name || !name[0]) { return (NULL); } /* Special case for "/". We will add our own '/' later. */ if (strcmp(name, pathSep) == 0) { name++; } size = strlen(name) + strlen(pathSep) + strlen(fileSep) + strlen(baseICEauthority) + 1; if (size > bsize) { if (buf) free (buf); buf = malloc ((unsigned) size); if (!buf) return (NULL); bsize = size; } snprintf(buf, bsize, "%s%s%s%s", name, pathSep, fileSep, baseICEauthority); return (buf); } int IceLockAuthFile (file_name, retries, timeout, dead) char *file_name; int retries; int timeout; long dead; { char creat_name[1025], link_name[1025]; struct stat statb; Time_t now; int creat_fd = -1; if ((int) strlen (file_name) > 1022) return (IceAuthLockError); strcpy (creat_name, file_name); strcat (creat_name, "-c"); strcpy (link_name, file_name); strcat (link_name, "-l"); if (stat (creat_name, &statb) != -1) { now = time ((Time_t *) 0); /* * NFS may cause ctime to be before now, special * case a 0 deadtime to force lock removal */ if (dead == 0 || now - statb.st_ctime > dead) { unlink (creat_name); unlink (link_name); } } while (retries > 0) { if (creat_fd == -1) { creat_fd = creat (creat_name, 0666); if (creat_fd == -1) { if (errno != EACCES) return (IceAuthLockError); } else close (creat_fd); } if (creat_fd != -1) { if (link (creat_name, link_name) != -1) return (IceAuthLockSuccess); if (errno == ENOENT) { creat_fd = -1; /* force re-creat next time around */ continue; } if (errno != EEXIST) return (IceAuthLockError); } sleep ((unsigned) timeout); --retries; } return (IceAuthLockTimeout); } void IceUnlockAuthFile (file_name) char *file_name; { #ifndef _WIN32 char creat_name[1025]; #endif char link_name[1025]; if ((int) strlen (file_name) > 1022) return; #ifndef _WIN32 strcpy (creat_name, file_name); strcat (creat_name, "-c"); #endif strcpy (link_name, file_name); strcat (link_name, "-l"); #ifndef _WIN32 unlink (creat_name); #endif unlink (link_name); } IceAuthFileEntry * IceReadAuthFileEntry (auth_file) FILE *auth_file; { IceAuthFileEntry local; IceAuthFileEntry *ret; local.protocol_name = NULL; local.protocol_data = NULL; local.network_id = NULL; local.auth_name = NULL; local.auth_data = NULL; if (!read_string (auth_file, &local.protocol_name)) return (NULL); if (!read_counted_string (auth_file, &local.protocol_data_length, &local.protocol_data)) goto bad; if (!read_string (auth_file, &local.network_id)) goto bad; if (!read_string (auth_file, &local.auth_name)) goto bad; if (!read_counted_string (auth_file, &local.auth_data_length, &local.auth_data)) goto bad; if (!(ret = (IceAuthFileEntry *) malloc (sizeof (IceAuthFileEntry)))) goto bad; *ret = local; return (ret); bad: if (local.protocol_name) free (local.protocol_name); if (local.protocol_data) free (local.protocol_data); if (local.network_id) free (local.network_id); if (local.auth_name) free (local.auth_name); if (local.auth_data) free (local.auth_data); return (NULL); } void IceFreeAuthFileEntry (auth) IceAuthFileEntry *auth; { if (auth) { if (auth->protocol_name) free (auth->protocol_name); if (auth->protocol_data) free (auth->protocol_data); if (auth->network_id) free (auth->network_id); if (auth->auth_name) free (auth->auth_name); if (auth->auth_data) free (auth->auth_data); free ((char *) auth); } } Status IceWriteAuthFileEntry (auth_file, auth) FILE *auth_file; IceAuthFileEntry *auth; { if (!write_string (auth_file, auth->protocol_name)) return (0); if (!write_counted_string (auth_file, auth->protocol_data_length, auth->protocol_data)) return (0); if (!write_string (auth_file, auth->network_id)) return (0); if (!write_string (auth_file, auth->auth_name)) return (0); if (!write_counted_string (auth_file, auth->auth_data_length, auth->auth_data)) return (0); return (1); } IceAuthFileEntry * IceGetAuthFileEntry (protocol_name, network_id, auth_name) const char *protocol_name; const char *network_id; const char *auth_name; { FILE *auth_file; char *filename; IceAuthFileEntry *entry; if (!(filename = IceAuthFileName ())) return (NULL); if (access (filename, R_OK) != 0) /* checks REAL id */ return (NULL); if (!(auth_file = fopen (filename, "rb"))) return (NULL); for (;;) { if (!(entry = IceReadAuthFileEntry (auth_file))) break; if (strcmp (protocol_name, entry->protocol_name) == 0 && strcmp (network_id, entry->network_id) == 0 && strcmp (auth_name, entry->auth_name) == 0) { break; } IceFreeAuthFileEntry (entry); } fclose (auth_file); return (entry); } /* * local routines */ static Status read_short (FILE *file, unsigned short *shortp) { unsigned char file_short[2]; if (fread ((char *) file_short, (int) sizeof (file_short), 1, file) != 1) return (0); *shortp = file_short[0] * 256 + file_short[1]; return (1); } static Status read_string (FILE *file, char **stringp) { unsigned short len; char *data; if (!read_short (file, &len)) return (0); if (len == 0) { data = malloc ( 1 ); *data = 0; } else { data = malloc ((unsigned) len + 1); if (!data) return (0); if (fread (data, (int) sizeof (char), (int) len, file) != len) { free (data); return (0); } data[len] = '\0'; } *stringp = data; return (1); } static Status read_counted_string (FILE *file, unsigned short *countp, char **stringp) { unsigned short len; char *data; if (!read_short (file, &len)) return (0); if (len == 0) { data = 0; } else { data = malloc ((unsigned) len); if (!data) return (0); if (fread (data, (int) sizeof (char), (int) len, file) != len) { free (data); return (0); } } *stringp = data; *countp = len; return (1); } static Status write_short (FILE *file, unsigned short s) { unsigned char file_short[2]; file_short[0] = (s & (unsigned) 0xff00) >> 8; file_short[1] = s & 0xff; if (fwrite ((char *) file_short, (int) sizeof (file_short), 1, file) != 1) return (0); return (1); } static Status write_string (FILE *file, char *string) { unsigned short count = strlen (string); if (!write_short (file, count)) return (0); if (fwrite (string, (int) sizeof (char), (int) count, file) != count) return (0); return (1); } static Status write_counted_string (FILE *file, unsigned short count, char *string) { if (!write_short (file, count)) return (0); if (fwrite (string, (int) sizeof (char), (int) count, file) != count) return (0); return (1); }