644 lines
16 KiB
C
644 lines
16 KiB
C
/* $Id$ */
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/**************************************************************************
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* rcfile.c *
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* *
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* Copyright (C) 1999-2003 Chris Allegretta *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2, or (at your option) *
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* any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software *
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
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* *
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**************************************************************************/
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#include "config.h"
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <stdio.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <pwd.h>
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#include <assert.h>
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#include "proto.h"
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#include "nano.h"
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#ifdef ENABLE_NANORC
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const static rcoption rcopts[] = {
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#ifndef NANO_SMALL
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{"autoindent", AUTOINDENT},
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{"backup", BACKUP_FILE},
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#endif
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{"const", CONSTUPDATE},
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#ifndef NANO_SMALL
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{"cut", CUT_TO_END},
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#endif
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#ifndef DISABLE_WRAPJUSTIFY
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{"fill", 0},
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#endif
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{"keypad", ALT_KEYPAD},
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#if !defined(DISABLE_MOUSE) && defined(NCURSES_MOUSE_VERSION)
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{"mouse", USE_MOUSE},
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#endif
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#ifdef ENABLE_MULTIBUFFER
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{"multibuffer", MULTIBUFFER},
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#endif
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#ifndef NANO_SMALL
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{"noconvert", NO_CONVERT},
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#endif
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{"nofollow", NOFOLLOW_SYMLINKS},
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{"nohelp", NO_HELP},
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#ifndef DISABLE_WRAPPING
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{"nowrap", NO_WRAP},
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#endif
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#ifndef DISABLE_OPERATINGDIR
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{"operatingdir", 0},
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#endif
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{"preserve", PRESERVE},
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#ifndef DISABLE_JUSTIFY
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{"quotestr", 0},
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#endif
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#ifdef HAVE_REGEX_H
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{"regexp", USE_REGEXP},
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#endif
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#ifndef NANO_SMALL
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{"smooth", SMOOTHSCROLL},
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#endif
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#ifndef DISABLE_SPELLER
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{"speller", 0},
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#endif
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{"suspend", SUSPEND},
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{"tabsize", 0},
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{"tempfile", TEMP_OPT},
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{"view", VIEW_MODE},
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{"historylog", HISTORYLOG},
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{NULL, 0}
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};
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static int errors = 0;
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static int lineno = 0;
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static char *nanorc;
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/* We have an error in some part of the rcfile; put it on stderr and
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make the user hit return to continue starting up nano. */
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void rcfile_error(const char *msg, ...)
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{
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va_list ap;
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fprintf(stderr, "\n");
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if (lineno > 0)
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fprintf(stderr, _("Error in %s on line %d: "), nanorc, lineno);
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va_start(ap, msg);
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vfprintf(stderr, msg, ap);
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va_end(ap);
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fprintf(stderr, _("\nPress return to continue starting nano\n"));
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while (getchar() != '\n');
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}
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/* Just print the error (one of many, perhaps) but don't abort, yet. */
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void rcfile_msg(const char *msg, ...)
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{
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va_list ap;
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if (!errors) {
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errors = 1;
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fprintf(stderr, "\n");
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}
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va_start(ap, msg);
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vfprintf(stderr, msg, ap);
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va_end(ap);
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fprintf(stderr, "\n");
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}
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/* Parse the next word from the string. Returns NULL if we hit EOL. */
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char *parse_next_word(char *ptr)
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{
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while (*ptr != ' ' && *ptr != '\t' && *ptr != '\n' && *ptr != '\0')
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ptr++;
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if (*ptr == '\0')
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return NULL;
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/* Null terminate and advance ptr */
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*ptr++ = 0;
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while (*ptr == ' ' || *ptr == '\t')
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ptr++;
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return ptr;
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}
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/* The keywords operatingdir, fill, tabsize, speller, and quotestr take
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* an argument when set. Among these, operatingdir, speller, and
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* quotestr have to allow tabs and spaces in the argument. Thus, if the
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* next word starts with a ", we say it ends with the last " of the line.
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* Otherwise, the word is interpreted as usual. That is so the arguments
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* can contain "s too. */
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char *parse_argument(char *ptr)
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{
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const char *ptr_bak = ptr;
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char *last_quote = NULL;
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assert(ptr != NULL);
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if (*ptr != '"')
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return parse_next_word(ptr);
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do {
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ptr++;
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if (*ptr == '"')
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last_quote = ptr;
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} while (*ptr != '\n' && *ptr != '\0');
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if (last_quote == NULL) {
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if (*ptr == '\0')
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ptr = NULL;
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else
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*ptr++ = '\0';
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rcfile_error(_("argument %s has unterminated \""), ptr_bak);
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} else {
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*last_quote = '\0';
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ptr = last_quote + 1;
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}
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if (ptr != NULL)
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while (*ptr == ' ' || *ptr == '\t')
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ptr++;
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return ptr;
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}
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#ifdef ENABLE_COLOR
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int colortoint(const char *colorname, int *bright)
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{
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int mcolor = 0;
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if (colorname == NULL)
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return -1;
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if (!strncasecmp(colorname, "bright", 6)) {
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*bright = 1;
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colorname += 6;
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}
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if (!strcasecmp(colorname, "green"))
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mcolor = COLOR_GREEN;
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else if (!strcasecmp(colorname, "red"))
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mcolor = COLOR_RED;
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else if (!strcasecmp(colorname, "blue"))
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mcolor = COLOR_BLUE;
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else if (!strcasecmp(colorname, "white"))
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mcolor = COLOR_WHITE;
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else if (!strcasecmp(colorname, "yellow"))
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mcolor = COLOR_YELLOW;
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else if (!strcasecmp(colorname, "cyan"))
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mcolor = COLOR_CYAN;
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else if (!strcasecmp(colorname, "magenta"))
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mcolor = COLOR_MAGENTA;
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else if (!strcasecmp(colorname, "black"))
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mcolor = COLOR_BLACK;
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else {
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rcfile_error(_("color %s not understood.\n"
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"Valid colors are \"green\", \"red\", \"blue\", \n"
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"\"white\", \"yellow\", \"cyan\", \"magenta\" and \n"
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"\"black\", with the optional prefix \"bright\".\n"));
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exit(1);
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}
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return mcolor;
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}
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char *parse_next_regex(char *ptr)
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{
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while ((*ptr != '"' || (*(ptr + 1) != ' ' && *(ptr + 1) != '\n'))
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&& *ptr != '\n' && *ptr != '\0')
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ptr++;
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if (*ptr == '\0')
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return NULL;
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/* Null terminate and advance ptr */
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*ptr++ = '\0';
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while (*ptr == ' ' || *ptr == '\t')
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ptr++;
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return ptr;
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}
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void parse_syntax(char *ptr)
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{
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syntaxtype *tmpsyntax = NULL;
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const char *fileregptr = NULL, *nameptr = NULL;
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exttype *exttmp = NULL;
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while (*ptr == ' ')
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ptr++;
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if (*ptr == '\n' || *ptr == '\0')
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return;
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if (*ptr != '"') {
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rcfile_error(_("regex strings must begin and end with a \" character\n"));
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return;
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}
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ptr++;
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nameptr = ptr;
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ptr = parse_next_regex(ptr);
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if (ptr == NULL) {
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rcfile_error(_("Missing syntax name"));
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return;
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}
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if (syntaxes == NULL) {
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syntaxes = (syntaxtype *)nmalloc(sizeof(syntaxtype));
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tmpsyntax = syntaxes;
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SET(COLOR_SYNTAX);
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} else {
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for (tmpsyntax = syntaxes; tmpsyntax->next != NULL;
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tmpsyntax = tmpsyntax->next)
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;
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tmpsyntax->next = (syntaxtype *)nmalloc(sizeof(syntaxtype));
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tmpsyntax = tmpsyntax->next;
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#ifdef DEBUG
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fprintf(stderr, _("Adding new syntax after 1st\n"));
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#endif
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}
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tmpsyntax->desc = mallocstrcpy(NULL, nameptr);
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tmpsyntax->color = NULL;
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tmpsyntax->extensions = NULL;
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tmpsyntax->next = NULL;
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#ifdef DEBUG
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fprintf(stderr, _("Starting a new syntax type\n"));
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fprintf(stderr, "string val=%s\n", nameptr);
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#endif
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/* Now load in the extensions to their part of the struct */
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while (*ptr != '\n' && *ptr != '\0') {
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while (*ptr != '"' && *ptr != '\n' && *ptr != '\0')
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ptr++;
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if (*ptr == '\n' || *ptr == '\0')
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return;
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ptr++;
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fileregptr = ptr;
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ptr = parse_next_regex(ptr);
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if (tmpsyntax->extensions == NULL) {
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tmpsyntax->extensions = (exttype *)nmalloc(sizeof(exttype));
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exttmp = tmpsyntax->extensions;
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} else {
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for (exttmp = tmpsyntax->extensions; exttmp->next != NULL;
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exttmp = exttmp->next);
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exttmp->next = (exttype *)nmalloc(sizeof(exttype));
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exttmp = exttmp->next;
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}
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exttmp->val = mallocstrcpy(NULL, fileregptr);
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exttmp->next = NULL;
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}
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}
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/* Parse the color stuff into the colorstrings array */
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void parse_colors(char *ptr)
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{
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int fg, bg, bright = 0;
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int expectend = 0; /* Do we expect an end= line? */
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char *fgstr;
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colortype *tmpcolor = NULL;
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syntaxtype *tmpsyntax = NULL;
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fgstr = ptr;
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ptr = parse_next_word(ptr);
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if (ptr == NULL) {
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rcfile_error(_("Missing color name"));
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return;
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}
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if (strstr(fgstr, ",")) {
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strtok(fgstr, ",");
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bg = colortoint(strtok(NULL, ","), &bright);
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} else
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bg = -1;
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fg = colortoint(fgstr, &bright);
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if (syntaxes == NULL) {
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rcfile_error(_("Cannot add a color directive without a syntax line"));
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return;
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}
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for (tmpsyntax = syntaxes; tmpsyntax->next != NULL;
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tmpsyntax = tmpsyntax->next)
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;
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/* Now the fun part, start adding regexps to individual strings
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in the colorstrings array, woo! */
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while (*ptr != '\0') {
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while (*ptr == ' ')
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ptr++;
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if (*ptr == '\n' || *ptr == '\0')
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break;
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if (!strncasecmp(ptr, "start=", 6)) {
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ptr += 6;
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expectend = 1;
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}
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if (*ptr != '"') {
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rcfile_error(_("regex strings must begin and end with a \" character\n"));
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ptr = parse_next_regex(ptr);
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continue;
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}
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ptr++;
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if (tmpsyntax->color == NULL) {
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tmpsyntax->color = nmalloc(sizeof(colortype));
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tmpcolor = tmpsyntax->color;
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#ifdef DEBUG
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fprintf(stderr, _("Starting a new colorstring for fg %d bg %d\n"),
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fg, bg);
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#endif
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} else {
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for (tmpcolor = tmpsyntax->color;
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tmpcolor->next != NULL; tmpcolor = tmpcolor->next);
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#ifdef DEBUG
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fprintf(stderr, _("Adding new entry for fg %d bg %d\n"), fg, bg);
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#endif
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tmpcolor->next = nmalloc(sizeof(colortype));
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tmpcolor = tmpcolor->next;
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}
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tmpcolor->fg = fg;
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tmpcolor->bg = bg;
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tmpcolor->bright = bright;
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tmpcolor->next = NULL;
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tmpcolor->start = ptr;
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ptr = parse_next_regex(ptr);
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tmpcolor->start = mallocstrcpy(NULL, tmpcolor->start);
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#ifdef DEBUG
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fprintf(stderr, _("string val=%s\n"), tmpcolor->start);
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#endif
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if (!expectend)
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tmpcolor->end = NULL;
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else {
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if (ptr == NULL || strncasecmp(ptr, "end=", 4)) {
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rcfile_error(_
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("\"start=\" requires a corresponding \"end=\""));
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return;
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}
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ptr += 4;
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if (*ptr != '"') {
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rcfile_error(_
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("regex strings must begin and end with a \" character\n"));
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continue;
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}
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ptr++;
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tmpcolor->end = ptr;
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ptr = parse_next_regex(ptr);
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tmpcolor->end = mallocstrcpy(NULL, tmpcolor->end);
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#ifdef DEBUG
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fprintf(stderr, _("For end part, beginning = \"%s\"\n"),
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tmpcolor->end);
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#endif
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}
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}
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}
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#endif /* ENABLE_COLOR */
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/* Parse the RC file, once it has been opened successfully */
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void parse_rcfile(FILE *rcstream)
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{
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char *buf, *ptr, *keyword, *option;
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int set = 0, i, j;
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buf = charalloc(1024);
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while (fgets(buf, 1023, rcstream) != 0) {
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lineno++;
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ptr = buf;
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while (*ptr == ' ' || *ptr == '\t')
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ptr++;
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if (*ptr == '\n' || *ptr == '\0')
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continue;
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if (*ptr == '#') {
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#ifdef DEBUG
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fprintf(stderr, _("%s: Read a comment\n"), "parse_rcfile()");
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#endif
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continue; /* Skip past commented lines */
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}
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/* Else skip to the next space */
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keyword = ptr;
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ptr = parse_next_word(ptr);
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if (ptr == NULL)
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continue;
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/* Else try to parse the keyword */
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if (!strcasecmp(keyword, "set"))
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set = 1;
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else if (!strcasecmp(keyword, "unset"))
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set = -1;
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#ifdef ENABLE_COLOR
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else if (!strcasecmp(keyword, "syntax"))
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parse_syntax(ptr);
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else if (!strcasecmp(keyword, "color"))
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parse_colors(ptr);
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#endif /* ENABLE_COLOR */
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else {
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rcfile_msg(_("command %s not understood"), keyword);
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continue;
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}
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option = ptr;
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ptr = parse_next_word(ptr);
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/* We don't care if ptr == NULL, as it should if using proper syntax */
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if (set != 0) {
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for (i = 0; rcopts[i].name != NULL; i++) {
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if (!strcasecmp(option, rcopts[i].name)) {
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#ifdef DEBUG
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fprintf(stderr, _("%s: Parsing option %s\n"),
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"parse_rcfile()", rcopts[i].name);
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#endif
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if (set == 1) {
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if (!strcasecmp(rcopts[i].name, "tabsize")
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#ifndef DISABLE_OPERATINGDIR
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|| !strcasecmp(rcopts[i].name, "operatingdir")
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#endif
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#ifndef DISABLE_WRAPJUSTIFY
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|| !strcasecmp(rcopts[i].name, "fill")
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#endif
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#ifndef DISABLE_JUSTIFY
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|| !strcasecmp(rcopts[i].name, "quotestr")
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#endif
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#ifndef DISABLE_SPELLER
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|| !strcasecmp(rcopts[i].name, "speller")
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#endif
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) {
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if (*ptr == '\n' || *ptr == '\0') {
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rcfile_error(_
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("option %s requires an argument"),
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rcopts[i].name);
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continue;
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}
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option = ptr;
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if (*option == '"')
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option++;
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ptr = parse_argument(ptr);
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#ifdef DEBUG
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fprintf(stderr, "option = %s\n", option);
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#endif
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#ifndef DISABLE_OPERATINGDIR
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if (!strcasecmp(rcopts[i].name, "operatingdir"))
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operating_dir = mallocstrcpy(NULL, option);
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else
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#endif
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#ifndef DISABLE_WRAPJUSTIFY
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if (!strcasecmp(rcopts[i].name, "fill")) {
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char *first_error;
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/* Using strtol() instead of atoi() lets
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* us accept 0 while checking other
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* errors. */
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j = (int)strtol(option, &first_error, 10);
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if (errno == ERANGE || *option == '\0' || *first_error != '\0')
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rcfile_error(_("requested fill size %d invalid"),
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j);
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else
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wrap_at = j;
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} else
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#endif
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#ifndef DISABLE_JUSTIFY
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if (!strcasecmp(rcopts[i].name, "quotestr"))
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quotestr = mallocstrcpy(NULL, option);
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else
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#endif
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#ifndef DISABLE_SPELLER
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if (!strcasecmp(rcopts[i].name, "speller"))
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alt_speller = mallocstrcpy(NULL, option);
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else
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#endif
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{
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char *first_error;
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/* Using strtol instead of atoi lets us
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* accept 0 while checking other
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* errors. */
|
|
j = (int)strtol(option, &first_error, 10);
|
|
if (errno == ERANGE || *option == '\0' || *first_error != '\0')
|
|
rcfile_error(_("requested tab size %d invalid"),
|
|
j);
|
|
else
|
|
tabsize = j;
|
|
}
|
|
} else
|
|
SET(rcopts[i].flag);
|
|
#ifdef DEBUG
|
|
fprintf(stderr, _("set flag %d!\n"),
|
|
rcopts[i].flag);
|
|
#endif
|
|
} else {
|
|
UNSET(rcopts[i].flag);
|
|
#ifdef DEBUG
|
|
fprintf(stderr, _("unset flag %d!\n"),
|
|
rcopts[i].flag);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
free(buf);
|
|
if (errors)
|
|
rcfile_error(_("Errors found in .nanorc file"));
|
|
|
|
return;
|
|
}
|
|
|
|
/* The main rc file function, tries to open the rc file */
|
|
void do_rcfile(void)
|
|
{
|
|
FILE *rcstream;
|
|
const struct passwd *userage;
|
|
uid_t euid = geteuid();
|
|
|
|
#ifdef SYSCONFDIR
|
|
assert(sizeof(SYSCONFDIR) == strlen(SYSCONFDIR) + 1);
|
|
nanorc = charalloc(sizeof(SYSCONFDIR) + 7);
|
|
sprintf(nanorc, "%s/nanorc", SYSCONFDIR);
|
|
/* Try to open system nanorc */
|
|
if ((rcstream = fopen(nanorc, "r")) != NULL) {
|
|
/* Parse it! */
|
|
parse_rcfile(rcstream);
|
|
fclose(rcstream);
|
|
}
|
|
#endif
|
|
|
|
/* Determine home directory using getpwent(), don't rely on $HOME */
|
|
do {
|
|
userage = getpwent();
|
|
} while (userage != NULL && userage->pw_uid != euid);
|
|
endpwent();
|
|
|
|
lineno = 0;
|
|
|
|
if (userage == NULL) {
|
|
rcfile_error(_("I can't find my home directory! Wah!"));
|
|
SET(NO_RCFILE);
|
|
} else {
|
|
nanorc = nrealloc(nanorc, strlen(userage->pw_dir) + 9);
|
|
sprintf(nanorc, "%s/.nanorc", userage->pw_dir);
|
|
|
|
#if defined(DISABLE_ROOTWRAP) && !defined(DISABLE_WRAPPING)
|
|
/* If we've already read $SYSCONFDIR/nanorc (if it's there), we're
|
|
root, and --disable-wrapping-as-root is used, turn wrapping off */
|
|
if (euid == 0)
|
|
SET(NO_WRAP);
|
|
#endif
|
|
if ((rcstream = fopen(nanorc, "r")) == NULL) {
|
|
/* Don't complain about the file not existing */
|
|
if (errno != ENOENT) {
|
|
rcfile_error(_("Unable to open ~/.nanorc file, %s"),
|
|
strerror(errno));
|
|
SET(NO_RCFILE);
|
|
}
|
|
} else {
|
|
parse_rcfile(rcstream);
|
|
fclose(rcstream);
|
|
}
|
|
}
|
|
|
|
free(nanorc);
|
|
#ifdef ENABLE_COLOR
|
|
set_colorpairs();
|
|
#endif
|
|
}
|
|
|
|
#endif /* ENABLE_NANORC */
|