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/* $Id$ */
/**************************************************************************
* rcfile.c *
* *
* Copyright (C) 2001-2004 Chris Allegretta *
* Copyright (C) 2005-2006 David Lawrence Ramsey *
* 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, 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., 51 Franklin St, Fifth Floor, Boston, MA *
* 02110-1301, USA. *
* *
**************************************************************************/
#include "proto.h"
#include <stdarg.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <ctype.h>
#ifdef ENABLE_NANORC
const static rcoption rcopts[] = {
{"boldtext", BOLD_TEXT},
#ifndef DISABLE_JUSTIFY
{"brackets", 0},
#endif
{"const", CONST_UPDATE},
#ifndef DISABLE_WRAPJUSTIFY
{"fill", 0},
#endif
#ifndef DISABLE_MOUSE
{"mouse", USE_MOUSE},
#endif
#ifdef ENABLE_MULTIBUFFER
{"multibuffer", MULTIBUFFER},
#endif
{"morespace", MORE_SPACE},
{"nofollow", NOFOLLOW_SYMLINKS},
{"nohelp", NO_HELP},
{"nonewlines", NO_NEWLINES},
#ifndef DISABLE_WRAPPING
{"nowrap", NO_WRAP},
#endif
#ifndef DISABLE_OPERATINGDIR
{"operatingdir", 0},
#endif
{"preserve", PRESERVE},
#ifndef DISABLE_JUSTIFY
{"punct", 0},
{"quotestr", 0},
#endif
{"rebinddelete", REBIND_DELETE},
{"rebindkeypad", REBIND_KEYPAD},
#ifdef HAVE_REGEX_H
{"regexp", USE_REGEXP},
#endif
#ifndef DISABLE_SPELLER
{"speller", 0},
#endif
{"suspend", SUSPEND},
{"tabsize", 0},
{"tempfile", TEMP_FILE},
{"view", VIEW_MODE},
#ifndef NANO_TINY
{"autoindent", AUTOINDENT},
{"backup", BACKUP_FILE},
{"backupdir", 0},
{"backwards", BACKWARDS_SEARCH},
{"casesensitive", CASE_SENSITIVE},
{"cut", CUT_TO_END},
{"historylog", HISTORYLOG},
{"matchbrackets", 0},
{"noconvert", NO_CONVERT},
{"quickblank", QUICK_BLANK},
{"smarthome", SMART_HOME},
{"smooth", SMOOTH_SCROLL},
{"tabstospaces", TABS_TO_SPACES},
{"whitespace", 0},
{"wordbounds", WORD_BOUNDS},
#endif
{NULL, 0}
};
static bool errors = FALSE;
/* Whether we got any errors while parsing an rcfile. */
static size_t lineno = 0;
/* If we did, the line number where the current error
* occurred. */
static char *nanorc = NULL;
/* The path to the rcfile we're parsing. */
#ifdef ENABLE_COLOR
static syntaxtype *endsyntax = NULL;
/* The end of the list of syntaxes. */
static colortype *endcolor = NULL;
/* The end of the color list for the current syntax. */
#endif
/* We have an error in some part of the rcfile. Put it on stderr and
* make the user hit Enter to continue starting up nano. */
void rcfile_error(const char *msg, ...)
{
va_list ap;
fprintf(stderr, "\n");
if (lineno > 0) {
errors = TRUE;
fprintf(stderr, _("Error in %s on line %lu: "), nanorc, (unsigned long)lineno);
}
va_start(ap, msg);
vfprintf(stderr, _(msg), ap);
va_end(ap);
fprintf(stderr, "\n");
}
/* Parse the next word from the string. Return points to '\0' if we hit
* the end of the line. */
char *parse_next_word(char *ptr)
{
while (!isblank(*ptr) && *ptr != '\0')
ptr++;
if (*ptr == '\0')
return ptr;
/* Null-terminate and advance ptr. */
*ptr++ = '\0';
while (isblank(*ptr))
ptr++;
return ptr;
}
/* Parse an argument, with optional quotes, after a keyword that takes
* one. If the next word starts with a ", we say that it ends with the
* last " of the line. Otherwise, we interpret it as usual, so that the
* arguments can contain "'s too. */
char *parse_argument(char *ptr)
{
const char *ptr_save = ptr;
char *last_quote = NULL;
assert(ptr != NULL);
if (*ptr != '"')
return parse_next_word(ptr);
do {
ptr++;
if (*ptr == '"')
last_quote = ptr;
} while (*ptr != '\0');
if (last_quote == NULL) {
if (*ptr == '\0')
ptr = NULL;
else
*ptr++ = '\0';
rcfile_error(N_("Argument %s has unterminated \""), ptr_save);
} else {
*last_quote = '\0';
ptr = last_quote + 1;
}
if (ptr != NULL)
while (isblank(*ptr))
ptr++;
return ptr;
}
#ifdef ENABLE_COLOR
/* Return the short value corresponding to the color named in colorname,
* and set bright to TRUE if that color is bright. */
short color_to_short(const char *colorname, bool *bright)
{
short mcolor = -1;
assert(colorname != NULL && bright != NULL);
if (strncasecmp(colorname, "bright", 6) == 0) {
*bright = TRUE;
colorname += 6;
}
if (strcasecmp(colorname, "green") == 0)
mcolor = COLOR_GREEN;
else if (strcasecmp(colorname, "red") == 0)
mcolor = COLOR_RED;
else if (strcasecmp(colorname, "blue") == 0)
mcolor = COLOR_BLUE;
else if (strcasecmp(colorname, "white") == 0)
mcolor = COLOR_WHITE;
else if (strcasecmp(colorname, "yellow") == 0)
mcolor = COLOR_YELLOW;
else if (strcasecmp(colorname, "cyan") == 0)
mcolor = COLOR_CYAN;
else if (strcasecmp(colorname, "magenta") == 0)
mcolor = COLOR_MAGENTA;
else if (strcasecmp(colorname, "black") == 0)
mcolor = COLOR_BLACK;
else
rcfile_error(N_("Color %s not understood.\n"
"Valid colors are \"green\", \"red\", \"blue\",\n"
"\"white\", \"yellow\", \"cyan\", \"magenta\" and\n"
"\"black\", with the optional prefix \"bright\"\n"
"for foreground colors."), colorname);
return mcolor;
}
/* Parse the next regex string from the line at ptr, and return it. */
char *parse_next_regex(char *ptr)
{
assert(ptr != NULL);
/* Continue until the end of the line, or a " followed by a space, a
* blank character, or \0. */
while ((*ptr != '"' || (!isblank(*(ptr + 1)) &&
*(ptr + 1) != '\0')) && *ptr != '\0')
ptr++;
assert(*ptr == '"' || *ptr == '\0');
if (*ptr == '\0') {
rcfile_error(
N_("Regex strings must begin and end with a \" character"));
return NULL;
}
/* Null terminate and advance ptr. */
*ptr++ = '\0';
while (isblank(*ptr))
ptr++;
return ptr;
}
/* Compile the regular expression regex to see if it's valid. Return
* TRUE if it is, or FALSE otherwise. */
bool nregcomp(const char *regex, int eflags)
{
regex_t preg;
int rc = regcomp(&preg, regex, REG_EXTENDED | eflags);
if (rc != 0) {
size_t len = regerror(rc, &preg, NULL, 0);
char *str = charalloc(len);
regerror(rc, &preg, str, len);
rcfile_error(N_("Bad regex \"%s\": %s"), regex, str);
free(str);
}
regfree(&preg);
return (rc == 0);
}
/* Parse the next syntax string from the line at ptr, and add it to the
* global list of color syntaxes. */
void parse_syntax(char *ptr)
{
const char *fileregptr = NULL, *nameptr = NULL;
const syntaxtype *tmpsyntax;
exttype *endext = NULL;
/* The end of the extensions list for this syntax. */
assert(ptr != NULL);
if (*ptr == '\0') {
rcfile_error(N_("Missing syntax name"));
return;
}
if (*ptr != '"') {
rcfile_error(
N_("Regex strings must begin and end with a \" character"));
return;
}
ptr++;
nameptr = ptr;
ptr = parse_next_regex(ptr);
if (ptr == NULL)
return;
for (tmpsyntax = syntaxes; tmpsyntax != NULL;
tmpsyntax = tmpsyntax->next) {
if (strcmp(nameptr, tmpsyntax->desc) == 0) {
rcfile_error(N_("Duplicate syntax name %s"), nameptr);
return;
}
}
if (syntaxes == NULL) {
syntaxes = (syntaxtype *)nmalloc(sizeof(syntaxtype));
endsyntax = syntaxes;
} else {
endsyntax->next = (syntaxtype *)nmalloc(sizeof(syntaxtype));
endsyntax = endsyntax->next;
#ifdef DEBUG
fprintf(stderr, "Adding new syntax after first one\n");
#endif
}
endsyntax->desc = mallocstrcpy(NULL, nameptr);
endsyntax->color = NULL;
endcolor = NULL;
endsyntax->extensions = NULL;
endsyntax->next = NULL;
#ifdef DEBUG
fprintf(stderr, "Starting a new syntax type: \"%s\"\n", nameptr);
#endif
/* The "none" syntax is the same as not having a syntax at all, so
* we can't assign any extensions or colors to it. */
if (strcmp(endsyntax->desc, "none") == 0) {
rcfile_error(N_("The \"none\" syntax is reserved"));
return;
}
/* The default syntax should have no associated extensions. */
if (strcmp(endsyntax->desc, "default") == 0 && *ptr != '\0') {
rcfile_error(
N_("The \"default\" syntax must take no extensions"));
return;
}
/* Now load the extensions into their part of the struct. */
while (*ptr != '\0') {
exttype *newext;
/* The new extension structure. */
while (*ptr != '"' && *ptr != '\0')
ptr++;
if (*ptr == '\0')
return;
ptr++;
fileregptr = ptr;
ptr = parse_next_regex(ptr);
if (ptr == NULL)
break;
newext = (exttype *)nmalloc(sizeof(exttype));
/* Save the extension regex if it's valid. */
if (nregcomp(fileregptr, REG_NOSUB)) {
newext->ext_regex = mallocstrcpy(NULL, fileregptr);
newext->ext = NULL;
if (endext == NULL)
endsyntax->extensions = newext;
else
endext->next = newext;
endext = newext;
endext->next = NULL;
} else
free(newext);
}
}
/* Parse the color string in the line at ptr, and add it to the current
* file's associated colors. If icase is TRUE, treat the color string
* as case insensitive. */
void parse_colors(char *ptr, bool icase)
{
short fg, bg;
bool bright = FALSE, no_fgcolor = FALSE;
char *fgstr;
assert(ptr != NULL);
if (*ptr == '\0') {
rcfile_error(N_("Missing color name"));
return;
}
fgstr = ptr;
ptr = parse_next_word(ptr);
if (strchr(fgstr, ',') != NULL) {
char *bgcolorname;
strtok(fgstr, ",");
bgcolorname = strtok(NULL, ",");
if (bgcolorname == NULL) {
/* If we have a background color without a foreground color,
* parse it properly. */
bgcolorname = fgstr + 1;
no_fgcolor = TRUE;
}
if (strncasecmp(bgcolorname, "bright", 6) == 0) {
rcfile_error(
N_("Background color %s cannot be bright"),
bgcolorname);
return;
}
bg = color_to_short(bgcolorname, &bright);
} else
bg = -1;
if (!no_fgcolor) {
fg = color_to_short(fgstr, &bright);
/* Don't try to parse screwed-up foreground colors. */
if (fg == -1)
return;
} else
fg = -1;
if (syntaxes == NULL) {
rcfile_error(
N_("Cannot add a color directive without a syntax line"));
return;
}
if (*ptr == '\0') {
rcfile_error(N_("Missing regex string"));
return;
}
/* Now for the fun part. Start adding regexes to individual strings
* in the colorstrings array, woo! */
while (ptr != NULL && *ptr != '\0') {
colortype *newcolor;
/* The new color structure. */
bool cancelled = FALSE;
/* The start expression was bad. */
bool expectend = FALSE;
/* Do we expect an end= line? */
if (strncasecmp(ptr, "start=", 6) == 0) {
ptr += 6;
expectend = TRUE;
}
if (*ptr != '"') {
rcfile_error(
N_("Regex strings must begin and end with a \" character"));
ptr = parse_next_regex(ptr);
continue;
}
ptr++;
fgstr = ptr;
ptr = parse_next_regex(ptr);
if (ptr == NULL)
break;
newcolor = (colortype *)nmalloc(sizeof(colortype));
/* Save the starting regex string if it's valid, and set up the
* color information. */
if (nregcomp(fgstr, icase ? REG_ICASE : 0)) {
newcolor->fg = fg;
newcolor->bg = bg;
newcolor->bright = bright;
newcolor->icase = icase;
newcolor->start_regex = mallocstrcpy(NULL, fgstr);
newcolor->start = NULL;
newcolor->end_regex = NULL;
newcolor->end = NULL;
newcolor->next = NULL;
if (endcolor == NULL) {
endsyntax->color = newcolor;
#ifdef DEBUG
fprintf(stderr, "Starting a new colorstring for fg %hd, bg %hd\n", fg, bg);
#endif
} else {
#ifdef DEBUG
fprintf(stderr, "Adding new entry for fg %hd, bg %hd\n", fg, bg);
#endif
endcolor->next = newcolor;
}
endcolor = newcolor;
} else {
free(newcolor);
cancelled = TRUE;
}
if (expectend) {
if (ptr == NULL || strncasecmp(ptr, "end=", 4) != 0) {
rcfile_error(
N_("\"start=\" requires a corresponding \"end=\""));
return;
}
ptr += 4;
if (*ptr != '"') {
rcfile_error(
N_("Regex strings must begin and end with a \" character"));
continue;
}
ptr++;
fgstr = ptr;
ptr = parse_next_regex(ptr);
if (ptr == NULL)
break;
/* If the start regex was invalid, skip past the end regex to
* stay in sync. */
if (cancelled)
continue;
/* Save the ending regex string if it's valid. */
newcolor->end_regex = (nregcomp(fgstr, icase ? REG_ICASE :
0)) ? mallocstrcpy(NULL, fgstr) : NULL;
}
}
}
#endif /* ENABLE_COLOR */
/* Parse the rcfile, once it has been opened successfully at
* rcstream. */
void parse_rcfile(FILE *rcstream)
{
char *buf = NULL;
ssize_t len;
size_t n;
while ((len = getline(&buf, &n, rcstream)) > 0) {
char *ptr, *keyword, *option;
int set = 0, i;
/* Ignore the \n. */
buf[len - 1] = '\0';
lineno++;
ptr = buf;
while (isblank(*ptr))
ptr++;
/* If we have a blank line or a comment, skip to the next
* line. */
if (*ptr == '\0' || *ptr == '#')
continue;
/* Otherwise, skip to the next space. */
keyword = ptr;
ptr = parse_next_word(ptr);
/* Try to parse the keyword. */
if (strcasecmp(keyword, "set") == 0)
set = 1;
else if (strcasecmp(keyword, "unset") == 0)
set = -1;
#ifdef ENABLE_COLOR
else if (strcasecmp(keyword, "syntax") == 0)
parse_syntax(ptr);
else if (strcasecmp(keyword, "color") == 0)
parse_colors(ptr, FALSE);
else if (strcasecmp(keyword, "icolor") == 0)
parse_colors(ptr, TRUE);
#endif /* ENABLE_COLOR */
else
rcfile_error(N_("Command %s not understood"), keyword);
if (set == 0)
continue;
if (*ptr == '\0') {
rcfile_error(N_("Missing flag"));
continue;
}
option = ptr;
ptr = parse_next_word(ptr);
for (i = 0; rcopts[i].name != NULL; i++) {
if (strcasecmp(option, rcopts[i].name) == 0) {
#ifdef DEBUG
fprintf(stderr, "parse_rcfile(): name = \"%s\"\n", rcopts[i].name);
#endif
if (set == 1) {
if (rcopts[i].flag != 0)
/* This option has a flag, so it doesn't take an
* argument. */
SET(rcopts[i].flag);
else {
/* This option doesn't have a flag, so it takes
*<2A>an argument. */
if (*ptr == '\0') {
rcfile_error(
N_("Option %s requires an argument"),
rcopts[i].name);
break;
}
option = ptr;
if (*option == '"')
option++;
ptr = parse_argument(ptr);
option = mallocstrcpy(NULL, option);
#ifdef DEBUG
fprintf(stderr, "option = \"%s\"\n", option);
#endif
/* Make sure option is a valid multibyte
* string. */
if (!is_valid_mbstring(option)) {
rcfile_error(
N_("Option is not a valid multibyte string"));
break;
}
#ifndef DISABLE_OPERATINGDIR
if (strcasecmp(rcopts[i].name, "operatingdir") == 0)
operating_dir = option;
else
#endif
#ifndef DISABLE_WRAPJUSTIFY
if (strcasecmp(rcopts[i].name, "fill") == 0) {
if (!parse_num(option, &wrap_at)) {
rcfile_error(
N_("Requested fill size %s invalid"),
option);
wrap_at = -CHARS_FROM_EOL;
} else
free(option);
} else
#endif
#ifndef NANO_TINY
if (strcasecmp(rcopts[i].name,
"matchbrackets") == 0) {
matchbrackets = option;
if (has_blank_mbchars(matchbrackets)) {
rcfile_error(
N_("Non-blank characters required"));
free(matchbrackets);
matchbrackets = NULL;
}
} else if (strcasecmp(rcopts[i].name,
"whitespace") == 0) {
whitespace = option;
if (mbstrlen(whitespace) != 2 ||
strlenpt(whitespace) != 2) {
rcfile_error(
N_("Two single-column characters required"));
free(whitespace);
whitespace = NULL;
} else {
whitespace_len[0] =
parse_mbchar(whitespace, NULL,
NULL);
whitespace_len[1] =
parse_mbchar(whitespace +
whitespace_len[0], NULL, NULL);
}
} else
#endif
#ifndef DISABLE_JUSTIFY
if (strcasecmp(rcopts[i].name, "punct") == 0) {
punct = option;
if (has_blank_mbchars(punct)) {
rcfile_error(
N_("Non-blank characters required"));
free(punct);
punct = NULL;
}
} else if (strcasecmp(rcopts[i].name,
"brackets") == 0) {
brackets = option;
if (has_blank_mbchars(brackets)) {
rcfile_error(
N_("Non-blank characters required"));
free(brackets);
brackets = NULL;
}
} else if (strcasecmp(rcopts[i].name,
"quotestr") == 0)
quotestr = option;
else
#endif
#ifndef NANO_TINY
if (strcasecmp(rcopts[i].name,
"backupdir") == 0)
backup_dir = option;
else
#endif
#ifndef DISABLE_SPELLER
if (strcasecmp(rcopts[i].name, "speller") == 0)
alt_speller = option;
else
#endif
if (strcasecmp(rcopts[i].name,
"tabsize") == 0) {
if (!parse_num(option, &tabsize) ||
tabsize <= 0) {
rcfile_error(
N_("Requested tab size %s invalid"),
option);
tabsize = -1;
} else
free(option);
} else
assert(FALSE);
}
#ifdef DEBUG
fprintf(stderr, "flag = %ld\n", rcopts[i].flag);
#endif
} else if (rcopts[i].flag != 0)
UNSET(rcopts[i].flag);
else
rcfile_error(N_("Cannot unset flag %s"),
rcopts[i].name);
break;
}
}
if (rcopts[i].name == NULL)
rcfile_error(N_("Unknown flag %s"), option);
}
free(buf);
fclose(rcstream);
lineno = 0;
if (errors) {
errors = FALSE;
fprintf(stderr, _("\nPress Enter to continue starting nano\n"));
while (getchar() != '\n')
;
}
return;
}
/* The main rcfile function. It tries to open the system-wide rcfile,
* followed by the local rcfile. */
void do_rcfile(void)
{
FILE *rcstream;
#ifdef SYSCONFDIR
nanorc = mallocstrcpy(nanorc, SYSCONFDIR "/nanorc");
/* Try to open the system-wide nanorc. */
rcstream = fopen(nanorc, "rb");
if (rcstream != NULL)
parse_rcfile(rcstream);
#endif
#if defined(DISABLE_ROOTWRAP) && !defined(DISABLE_WRAPPING)
/* We've already read SYSCONFDIR/nanorc, if it's there. If we're
* root and --disable-wrapping-as-root is used, turn wrapping
* off now. */
if (geteuid() == NANO_ROOT_UID)
SET(NO_WRAP);
#endif
get_homedir();
if (homedir == NULL)
rcfile_error(N_("I can't find my home directory! Wah!"));
else {
nanorc = charealloc(nanorc, strlen(homedir) + 9);
sprintf(nanorc, "%s/.nanorc", homedir);
rcstream = fopen(nanorc, "rb");
if (rcstream == NULL) {
/* Don't complain about the file's not existing. */
if (errno != ENOENT)
rcfile_error(N_("Error reading %s: %s"), nanorc,
strerror(errno));
} else
parse_rcfile(rcstream);
}
free(nanorc);
nanorc = NULL;
#ifdef ENABLE_COLOR
set_colorpairs();
#endif
}
#endif /* ENABLE_NANORC */
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