/**************************************************************************** * Copyright (c) 1998-2000,2002 Free Software Foundation, Inc.              * *                                                                          * * 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, distribute with modifications, 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 ABOVE COPYRIGHT HOLDERS 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(s) of the above copyright   * * holders shall not be used in advertising or otherwise to promote the     * * sale, use or other dealings in this Software without prior written       * * authorization.                                                           * ****************************************************************************//**************************************************************************** *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               * *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         * ****************************************************************************//* *	write_entry.c -- write a terminfo structure onto the file system */#include <curses.priv.h>#include <sys/stat.h>#include <tic.h>#include <term_entry.h>#ifndef S_ISDIR#define S_ISDIR(mode) ((mode & S_IFMT) == S_IFDIR)#endif#if 0#define TRACE_OUT(p) DEBUG(2, p)#else#define TRACE_OUT(p)		/*nothing */#endifMODULE_ID("$Id: write_entry.c,v 1.58 2002/04/21 20:35:08 tom Exp $")static int total_written;static int write_object(FILE *, TERMTYPE *);static voidwrite_file(char *filename, TERMTYPE * tp){    FILE *fp = (_nc_access(filename, W_OK) == 0) ? fopen(filename, "wb") : 0;    if (fp == 0) {	perror(filename);	_nc_syserr_abort("can't open %s/%s", _nc_tic_dir(0), filename);    }    DEBUG(1, ("Created %s", filename));    if (write_object(fp, tp) == ERR) {	_nc_syserr_abort("error writing %s/%s", _nc_tic_dir(0), filename);    }    fclose(fp);}/* *	make_directory(char *path) * *	Make a directory if it doesn't exist. */static intmake_directory(const char *path){    int rc;    struct stat statbuf;    char fullpath[PATH_MAX];    const char *destination = _nc_tic_dir(0);    if (path == destination || *path == '/') {	if (strlen(path) + 1 > sizeof(fullpath))	    return (-1);	(void) strcpy(fullpath, path);    } else {	if (strlen(destination) + strlen(path) + 2 > sizeof(fullpath))	    return (-1);	(void) sprintf(fullpath, "%s/%s", destination, path);    }    if ((rc = stat(path, &statbuf)) < 0) {	rc = mkdir(path, 0777);    } else {	if (_nc_access(path, R_OK | W_OK | X_OK) < 0) {	    rc = -1;		/* permission denied */	} else if (!(S_ISDIR(statbuf.st_mode))) {	    rc = -1;		/* not a directory */	}    }    return rc;}NCURSES_EXPORT(void)_nc_set_writedir(char *dir)/* set the write directory for compiled entries */{    const char *destination;    char actual[PATH_MAX];    if (dir == 0	&& use_terminfo_vars())	dir = getenv("TERMINFO");    if (dir != 0)	(void) _nc_tic_dir(dir);    destination = _nc_tic_dir(0);    if (make_directory(destination) < 0) {	char *home = _nc_home_terminfo();	if (home != 0) {	    destination = home;	    if (make_directory(destination) < 0)		_nc_err_abort("%s: permission denied (errno %d)",			      destination, errno);	}    }    /*     * Note: because of this code, this logic should be exercised     * *once only* per run.     */    if (chdir(_nc_tic_dir(destination)) < 0	|| getcwd(actual, sizeof(actual)) == 0)	_nc_err_abort("%s: not a directory", destination);    _nc_keep_tic_dir(strdup(actual));}/* *	check_writeable(char code) * *	Miscellaneous initialisations * *	Check for access rights to destination directories *	Create any directories which don't exist. *	Note: there's no reason to return the result of make_directory(), since *	this function is called only in instances where that has to succeed. * */static voidcheck_writeable(int code){    static const char dirnames[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";    static bool verified[sizeof(dirnames)];    char dir[2];    char *s = 0;    if (code == 0 || (s = strchr(dirnames, code)) == 0)	_nc_err_abort("Illegal terminfo subdirectory \"%c\"", code);    if (verified[s - dirnames])	return;    dir[0] = code;    dir[1] = '\0';    if (make_directory(dir) < 0) {	_nc_err_abort("%s/%s: permission denied", _nc_tic_dir(0), dir);    }    verified[s - dirnames] = TRUE;}/* *	_nc_write_entry() * *	Save the compiled version of a description in the filesystem. * *	make a copy of the name-list *	break it up into first-name and all-but-last-name *	creat(first-name) *	write object information to first-name *	close(first-name) *      for each name in all-but-last-name *	    link to first-name * *	Using 'time()' to obtain a reference for file timestamps is unreliable, *	e.g., with NFS, because the filesystem may have a different time *	reference.  We check for pre-existence of links by latching the first *	timestamp from a file that we create. * *	The _nc_warning() calls will report a correct line number only if *	_nc_curr_line is properly set before the write_entry() call. */void_nc_write_entry(TERMTYPE * const tp){    struct stat statbuf;    char name_list[MAX_TERMINFO_LENGTH];    char *first_name, *other_names;    char *ptr;    char filename[PATH_MAX];    char linkname[PATH_MAX];#if USE_SYMLINKS    char symlinkname[PATH_MAX];#if !HAVE_LINK#undef HAVE_LINK#define HAVE_LINK 1#endif#endif /* USE_SYMLINKS */    static int call_count;    static time_t start_time;	/* time at start of writes */    if (call_count++ == 0) {	start_time = 0;    }    (void) strcpy(name_list, tp->term_names);    DEBUG(7, ("Name list = '%s'", name_list));    first_name = name_list;    ptr = &name_list[strlen(name_list) - 1];    other_names = ptr + 1;    while (ptr > name_list && *ptr != '|')	ptr--;    if (ptr != name_list) {	*ptr = '\0';	for (ptr = name_list; *ptr != '\0' && *ptr != '|'; ptr++)	    continue;	if (*ptr == '\0')	    other_names = ptr;	else {	    *ptr = '\0';	    other_names = ptr + 1;	}    }    DEBUG(7, ("First name = '%s'", first_name));    DEBUG(7, ("Other names = '%s'", other_names));    _nc_set_type(first_name);    if (strlen(first_name) > sizeof(filename) - 3)	_nc_warning("terminal name too long.");    sprintf(filename, "%c/%s", first_name[0], first_name);    /*     * Has this primary name been written since the first call to     * write_entry()?  If so, the newer write will step on the older,     * so warn the user.     */    if (start_time > 0 &&	stat(filename, &statbuf) >= 0	&& statbuf.st_mtime >= start_time) {	_nc_warning("name multiply defined.");    }    check_writeable(first_name[0]);    write_file(filename, tp);    if (start_time == 0) {	if (stat(filename, &statbuf) < 0	    || (start_time = statbuf.st_mtime) == 0) {	    _nc_syserr_abort("error obtaining time from %s/%s",			     _nc_tic_dir(0), filename);	}    }    while (*other_names != '\0') {	ptr = other_names++;	while (*other_names != '|' && *other_names != '\0')	    other_names++;	if (*other_names != '\0')	    *(other_names++) = '\0';	if (strlen(ptr) > sizeof(linkname) - 3) {	    _nc_warning("terminal alias %s too long.", ptr);	    continue;	}