/* xqtfil.c Routines to read execute files. Copyright (C) 1991, 1992, 1993, 1995 Ian Lance Taylor This file is part of the Taylor UUCP package. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. The author of the program may be contacted at ian@airs.com or c/o Cygnus Support, 48 Grove Street, Somerville, MA 02144. */ #include "uucp.h" #if USE_RCS_ID const char xqtfil_rcsid[] = "$Id: xqtfil.c,v 1.1 1995/10/18 08:38:32 deraadt Exp $"; #endif #include "uudefs.h" #include "sysdep.h" #include "system.h" #include #if HAVE_OPENDIR #if HAVE_DIRENT_H #include #else /* ! HAVE_DIRENT_H */ #include #define dirent direct #endif /* ! HAVE_DIRENT_H */ #endif /* HAVE_OPENDIR */ /* Under the V2 or BSD42 spool directory scheme, all execute files are in the main spool directory. Under the BSD43 scheme, they are all in the directory X.. Under the HDB or SVR4 scheme, they are in directories named after systems. Under the ULTRIX scheme, they are in X. subdirectories of subdirectories of sys. Under the TAYLOR scheme, they are all in the subdirectory X. of a directory named after the system. This means that for HDB, ULTRIX, SVR4 or TAYLOR, we have to search directories of directories. */ #if SPOOLDIR_V2 || SPOOLDIR_BSD42 #define ZDIR "." #define SUBDIRS 0 #endif #if SPOOLDIR_HDB || SPOOLDIR_SVR4 || SPOOLDIR_TAYLOR #define ZDIR "." #define SUBDIRS 1 #endif #if SPOOLDIR_ULTRIX #define ZDIR "sys" #define SUBDIRS 1 #endif #if SPOOLDIR_BSD43 #define ZDIR "X." #define SUBDIRS 0 #endif /* Static variables for the execute file scan. */ static DIR *qSxqt_topdir; #if ! SUBDIRS static const char *zSdir; #else /* SUBDIRS */ static boolean fSone_dir; static char *zSdir; static DIR *qSxqt_dir; static char *zSsystem; #endif /* SUBDIRS */ /* Initialize the scan for execute files. The function usysdep_get_xqt_free will clear the data out when we are done with the system. This returns FALSE on error. */ /*ARGSUSED*/ boolean fsysdep_get_xqt_init (zsystem) const char *zsystem; { usysdep_get_xqt_free ((const char *) NULL); #if SUBDIRS if (zsystem != NULL) { #if SPOOLDIR_HDB || SPOOLDIR_SVR4 zSdir = zbufcpy (zsystem); #endif #if SPOOLDIR_ULTRIX zSdir = zsappend3 ("sys", zsystem, "X."); #endif #if SPOOLDIR_TAYLOR zSdir = zsysdep_in_dir (zsystem, "X."); #endif qSxqt_dir = opendir ((char *) zSdir); if (qSxqt_dir != NULL) { qSxqt_topdir = qSxqt_dir; fSone_dir = TRUE; zSsystem = zbufcpy (zsystem); return TRUE; } } fSone_dir = FALSE; #endif qSxqt_topdir = opendir ((char *) ZDIR); if (qSxqt_topdir == NULL) { if (errno == ENOENT) return TRUE; ulog (LOG_ERROR, "opendir (%s): %s", ZDIR, strerror (errno)); return FALSE; } return TRUE; } /* Return the name of the next execute file to read and process. If this returns NULL, *pferr must be checked. If will be TRUE on error, FALSE if there are no more files. On a successful return *pzsystem will be set to the system for which the execute file was created. */ /*ARGSUSED*/ char * zsysdep_get_xqt (zsystem, pzsystem, pferr) const char *zsystem; char **pzsystem; boolean *pferr; { *pferr = FALSE; if (qSxqt_topdir == NULL) return NULL; /* This loop continues until we find a file. */ while (TRUE) { DIR *qdir; struct dirent *q; #if ! SUBDIRS zSdir = ZDIR; qdir = qSxqt_topdir; #else /* SUBDIRS */ /* This loop continues until we find a subdirectory to read. */ while (qSxqt_dir == NULL) { struct dirent *qtop; qtop = readdir (qSxqt_topdir); if (qtop == NULL) { (void) closedir (qSxqt_topdir); qSxqt_topdir = NULL; return NULL; } /* No system name may start with a dot This allows us to quickly skip impossible directories. */ if (qtop->d_name[0] == '.') continue; DEBUG_MESSAGE1 (DEBUG_SPOOLDIR, "zsysdep_get_xqt: Found %s in top directory", qtop->d_name); ubuffree (zSdir); #if SPOOLDIR_HDB || SPOOLDIR_SVR4 zSdir = zbufcpy (qtop->d_name); #endif #if SPOOLDIR_ULTRIX zSdir = zsappend3 ("sys", qtop->d_name, "X."); #endif #if SPOOLDIR_TAYLOR zSdir = zsysdep_in_dir (qtop->d_name, "X."); #endif ubuffree (zSsystem); zSsystem = zbufcpy (qtop->d_name); qSxqt_dir = opendir (zSdir); if (qSxqt_dir == NULL && errno != ENOTDIR && errno != ENOENT) ulog (LOG_ERROR, "opendir (%s): %s", zSdir, strerror (errno)); } qdir = qSxqt_dir; #endif /* SUBDIRS */ q = readdir (qdir); #if DEBUG > 1 if (q != NULL) DEBUG_MESSAGE2 (DEBUG_SPOOLDIR, "zsysdep_get_xqt: Found %s in subdirectory %s", q->d_name, zSdir); #endif /* If we've found an execute file, return it. We have to get the system name, which is easy for HDB or TAYLOR. For other spool directory schemes, we have to pull it out of the X. file name; this would be insecure, except that zsfind_file clobbers the file name to include the real system name. */ if (q != NULL && q->d_name[0] == 'X' && q->d_name[1] == '.') { char *zret; #if SPOOLDIR_HDB || SPOOLDIR_SVR4 || SPOOLDIR_TAYLOR *pzsystem = zbufcpy (zSsystem); #else { size_t clen; clen = strlen (q->d_name) - 7; *pzsystem = zbufalc (clen + 1); memcpy (*pzsystem, q->d_name + 2, clen); (*pzsystem)[clen] = '\0'; } #endif zret = zsysdep_in_dir (zSdir, q->d_name); #if DEBUG > 1 DEBUG_MESSAGE2 (DEBUG_SPOOLDIR, "zsysdep_get_xqt: Returning %s (system %s)", zret, *pzsystem); #endif return zret; } /* If we've reached the end of the directory, then if we are using subdirectories loop around to read the next one, otherwise we are finished. */ if (q == NULL) { (void) closedir (qdir); #if SUBDIRS qSxqt_dir = NULL; if (! fSone_dir) continue; #endif qSxqt_topdir = NULL; return NULL; } } } /* Free up the results of an execute file scan, when we're done with this system. */ /*ARGSUSED*/ void usysdep_get_xqt_free (zsystem) const char *zsystem; { if (qSxqt_topdir != NULL) { (void) closedir (qSxqt_topdir); qSxqt_topdir = NULL; } #if SUBDIRS if (qSxqt_dir != NULL) { (void) closedir (qSxqt_dir); qSxqt_dir = NULL; } ubuffree (zSdir); zSdir = NULL; ubuffree (zSsystem); zSsystem = NULL; fSone_dir = FALSE; #endif }