/************************************************************************** * rcfile.c -- This file is part of GNU nano. * * * * Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, * * 2010, 2011, 2013, 2014 Free Software Foundation, Inc. * * Copyright (C) 2014 Mike Frysinger * * Copyright (C) 2014, 2015, 2016 Benno Schulenberg * * * * GNU nano 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 3 of the License, * * or (at your option) any later version. * * * * GNU nano 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, see http://www.gnu.org/licenses/. * * * **************************************************************************/ #include "proto.h" #include #include #include #include #include #include #include #ifndef DISABLE_NANORC #ifndef RCFILE_NAME #define RCFILE_NAME ".nanorc" #endif static const rcoption rcopts[] = { {"boldtext", BOLD_TEXT}, #ifdef ENABLE_LINENUMBERS {"linenumbers", LINE_NUMBERS}, #endif #ifndef DISABLE_JUSTIFY {"brackets", 0}, #endif {"const", CONST_UPDATE}, /* deprecated form, remove in 2018 */ {"constantshow", CONST_UPDATE}, #ifndef DISABLE_WRAPJUSTIFY {"fill", 0}, #endif #ifndef DISABLE_HISTORIES {"historylog", HISTORYLOG}, #endif {"morespace", MORE_SPACE}, #ifndef DISABLE_MOUSE {"mouse", USE_MOUSE}, #endif #ifndef DISABLE_MULTIBUFFER {"multibuffer", MULTIBUFFER}, #endif {"nohelp", NO_HELP}, {"nonewlines", NO_NEWLINES}, #ifndef DISABLE_WRAPPING {"nowrap", NO_WRAP}, #endif #ifndef DISABLE_OPERATINGDIR {"operatingdir", 0}, #endif #ifndef DISABLE_HISTORIES {"poslog", POS_HISTORY}, /* deprecated form, remove in 2018 */ {"positionlog", POS_HISTORY}, #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 {"allow_insecure_backup", INSECURE_BACKUP}, {"autoindent", AUTOINDENT}, {"backup", BACKUP_FILE}, {"backupdir", 0}, {"backwards", BACKWARDS_SEARCH}, {"casesensitive", CASE_SENSITIVE}, {"cut", CUT_TO_END}, {"justifytrim", JUSTIFY_TRIM}, {"locking", LOCKING}, {"matchbrackets", 0}, {"noconvert", NO_CONVERT}, {"quickblank", QUICK_BLANK}, {"quiet", QUIET}, {"showcursor", SHOW_CURSOR}, {"smarthome", SMART_HOME}, {"smooth", SMOOTH_SCROLL}, {"softwrap", SOFTWRAP}, {"tabstospaces", TABS_TO_SPACES}, {"unix", MAKE_IT_UNIX}, {"whitespace", 0}, {"wordbounds", WORD_BOUNDS}, {"wordchars", 0}, #endif #ifndef DISABLE_COLOR {"titlecolor", 0}, {"numbercolor", 0}, {"statuscolor", 0}, {"keycolor", 0}, {"functioncolor", 0}, #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 last error occurred. */ static char *nanorc = NULL; /* The path to the rcfile we're parsing. */ #ifndef DISABLE_COLOR static bool opensyntax = FALSE; /* Whether we're allowed to add to the last syntax. When a file ends, * or when a new syntax command is seen, this bool becomes FALSE. */ static syntaxtype *live_syntax; /* The syntax that is currently being parsed. */ static colortype *lastcolor = NULL; /* The end of the color list for the current syntax. */ #endif /* We have an error in some part of the rcfile. Print the error message * on stderr, and then make the user hit Enter to continue starting * nano. */ void rcfile_error(const char *msg, ...) { va_list ap; if (ISSET(QUIET)) return; 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"); } #endif /* !DISABLE_NANORC */ #if !defined(DISABLE_NANORC) || !defined(DISABLE_HISTORIES) /* Parse the next word from the string, null-terminate it, and return * a pointer to the first character after the null terminator. The * returned pointer will point 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; } #endif /* !DISABLE_NANORC || !DISABLE_HISTORIES */ #ifndef DISABLE_NANORC /* 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 an unterminated \""), ptr_save); } else { *last_quote = '\0'; ptr = last_quote + 1; } if (ptr != NULL) while (isblank(*ptr)) ptr++; return ptr; } #ifndef DISABLE_COLOR /* Pass over the current regex string in the line starting at ptr, * null-terminate it, and return a pointer to the /next/ word. */ char *parse_next_regex(char *ptr) { assert(ptr != NULL); /* Continue until the end of line, or until a " followed by a * blank character or the end of line. */ while (*ptr != '\0' && (*ptr != '"' || (*(ptr + 1) != '\0' && !isblank(*(ptr + 1))))) 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, and FALSE otherwise. */ bool nregcomp(const char *regex, int compile_flags) { regex_t preg; const char *r = fixbounds(regex); int rc = regcomp(&preg, r, compile_flags); 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"), r, str); free(str); } regfree(&preg); return (rc == 0); } /* Parse the next syntax name and its possible extension regexes from the * line at ptr, and add it to the global linked list of color syntaxes. */ void parse_syntax(char *ptr) { char *nameptr; /* A pointer to what should be the name of the syntax. */ opensyntax = FALSE; assert(ptr != NULL); /* Check that the syntax name is not empty. */ if (*ptr == '\0' || (*ptr == '"' && (*(ptr + 1) == '\0' || *(ptr + 1) == '"'))) { rcfile_error(N_("Missing syntax name")); return; } nameptr = ++ptr; ptr = parse_next_word(ptr); /* Check that the name starts and ends with a double quote. */ if (*(nameptr - 1) != '\x22' || nameptr[strlen(nameptr) - 1] != '\x22') { rcfile_error(N_("A syntax name must be quoted")); return; } /* Strip the end quote. */ nameptr[strlen(nameptr) - 1] = '\0'; /* Redefining the "none" syntax is not allowed. */ if (strcmp(nameptr, "none") == 0) { rcfile_error(N_("The \"none\" syntax is reserved")); return; } /* Initialize a new syntax struct. */ live_syntax = (syntaxtype *)nmalloc(sizeof(syntaxtype)); live_syntax->name = mallocstrcpy(NULL, nameptr); live_syntax->extensions = NULL; live_syntax->headers = NULL; live_syntax->magics = NULL; live_syntax->linter = NULL; live_syntax->formatter = NULL; live_syntax->comment = NULL; live_syntax->color = NULL; lastcolor = NULL; live_syntax->nmultis = 0; /* Hook the new syntax in at the top of the list. */ live_syntax->next = syntaxes; syntaxes = live_syntax; opensyntax = TRUE; #ifdef DEBUG fprintf(stderr, "Starting a new syntax type: \"%s\"\n", nameptr); #endif /* The default syntax should have no associated extensions. */ if (strcmp(live_syntax->name, "default") == 0 && *ptr != '\0') { rcfile_error( N_("The \"default\" syntax does not accept extensions")); return; } /* If there seem to be extension regexes, pick them up. */ if (*ptr != '\0') grab_and_store("extension", ptr, &live_syntax->extensions); } #endif /* !DISABLE_COLOR */ /* Check whether the given executable function is "universal" (meaning * any horizontal movement or deletion) and thus is present in almost * all menus. */ bool is_universal(void (*func)) { if (func == do_left || func == do_right || func == do_home || func == do_end || func == do_prev_word_void || func == do_next_word_void || func == do_verbatim_input || func == do_cut_text_void || func == do_delete || func == do_backspace || func == do_tab || func == do_enter) return TRUE; else return FALSE; } /* Bind or unbind a key combo, to or from a function. */ void parse_binding(char *ptr, bool dobind) { char *keyptr = NULL, *keycopy = NULL, *funcptr = NULL, *menuptr = NULL; sc *s, *newsc = NULL; int menu; assert(ptr != NULL); #ifdef DEBUG fprintf(stderr, "Starting the rebinding code...\n"); #endif if (*ptr == '\0') { rcfile_error(N_("Missing key name")); return; } keyptr = ptr; ptr = parse_next_word(ptr); keycopy = mallocstrcpy(NULL, keyptr); if (strlen(keycopy) < 2) { rcfile_error(N_("Key name is too short")); goto free_copy; } /* Uppercase only the first two or three characters of the key name. */ keycopy[0] = toupper(keycopy[0]); keycopy[1] = toupper(keycopy[1]); if (keycopy[0] == 'M' && keycopy[1] == '-') { if (strlen(keycopy) > 2) keycopy[2] = toupper(keycopy[2]); else { rcfile_error(N_("Key name is too short")); goto free_copy; } } /* Allow the codes for Insert and Delete to be rebound, but apart * from those two only Control, Meta and Function sequences. */ if (!strcasecmp(keycopy, "Ins") || !strcasecmp(keycopy, "Del")) keycopy[1] = tolower(keycopy[1]); else if (keycopy[0] != '^' && keycopy[0] != 'M' && keycopy[0] != 'F') { rcfile_error(N_("Key name must begin with \"^\", \"M\", or \"F\"")); goto free_copy; } else if ((keycopy[0] == 'M' && keycopy[1] != '-') || (keycopy[0] == '^' && ((keycopy[1] < 'A' || keycopy[1] > 'z') || keycopy[1] == '[' || keycopy[1] == '`' || (strlen(keycopy) > 2 && strcmp(keycopy, "^Space") != 0))) || (strlen(keycopy) > 3 && strcmp(keycopy, "^Space") != 0 && strcmp(keycopy, "M-Space") != 0)) { rcfile_error(N_("Key name %s is invalid"), keycopy); goto free_copy; } if (dobind) { funcptr = ptr; ptr = parse_next_word(ptr); if (funcptr[0] == '\0') { rcfile_error(N_("Must specify a function to bind the key to")); goto free_copy; } } menuptr = ptr; ptr = parse_next_word(ptr); if (menuptr[0] == '\0') { /* TRANSLATORS: Do not translate the word "all". */ rcfile_error(N_("Must specify a menu (or \"all\") in which to bind/unbind the key")); goto free_copy; } if (dobind) { newsc = strtosc(funcptr); if (newsc == NULL) { rcfile_error(N_("Cannot map name \"%s\" to a function"), funcptr); goto free_copy; } } menu = strtomenu(menuptr); if (menu < 1) { rcfile_error(N_("Cannot map name \"%s\" to a menu"), menuptr); goto free_copy; } #ifdef DEBUG if (dobind) fprintf(stderr, "newsc address is now %ld, assigned func = %ld, menu = %x\n", (long)&newsc, (long)newsc->scfunc, menu); else fprintf(stderr, "unbinding \"%s\" from menu %x\n", keycopy, menu); #endif if (dobind) { subnfunc *f; int mask = 0; /* Tally up the menus where the function exists. */ for (f = allfuncs; f != NULL; f = f->next) if (f->scfunc == newsc->scfunc) mask = mask | f->menus; #ifndef NANO_TINY /* Handle the special case of the toggles. */ if (newsc->scfunc == do_toggle_void) mask = MMAIN; #endif /* Now limit the given menu to those where the function exists. */ if (is_universal(newsc->scfunc)) menu = menu & MMOST; else menu = menu & mask; if (!menu) { rcfile_error(N_("Function '%s' does not exist in menu '%s'"), funcptr, menuptr); free(newsc); goto free_copy; } newsc->menus = menu; assign_keyinfo(newsc, keycopy, 0); /* Do not allow rebinding a frequent escape-sequence starter: Esc [. */ if (newsc->meta && newsc->keycode == 91) { rcfile_error(N_("Sorry, keystroke \"%s\" may not be rebound"), newsc->keystr); free(newsc); goto free_copy; } #ifdef DEBUG fprintf(stderr, "s->keystr = \"%s\"\n", newsc->keystr); fprintf(stderr, "s->keycode = \"%d\"\n", newsc->keycode); #endif } /* Now find and delete any existing same shortcut in the menu(s). */ for (s = sclist; s != NULL; s = s->next) { if ((s->menus & menu) && !strcmp(s->keystr, keycopy)) { #ifdef DEBUG fprintf(stderr, "deleting entry from among menus %x\n", s->menus); #endif s->menus &= ~menu; } } if (dobind) { #ifndef NANO_TINY /* If this is a toggle, copy its sequence number. */ if (newsc->scfunc == do_toggle_void) { for (s = sclist; s != NULL; s = s->next) if (s->scfunc == do_toggle_void && s->toggle == newsc->toggle) newsc->ordinal = s->ordinal; } else newsc->ordinal = 0; #endif /* Add the new shortcut at the start of the list. */ newsc->next = sclist; sclist = newsc; return; } free_copy: free(keycopy); } #ifndef DISABLE_COLOR /* Read and parse one included syntax file. */ static void parse_one_include(char *file) { struct stat rcinfo; FILE *rcstream; /* Don't open directories, character files, or block files. */ if (stat(file, &rcinfo) != -1 && (S_ISDIR(rcinfo.st_mode) || S_ISCHR(rcinfo.st_mode) || S_ISBLK(rcinfo.st_mode))) { rcfile_error(S_ISDIR(rcinfo.st_mode) ? _("\"%s\" is a directory") : _("\"%s\" is a device file"), file); return; } /* Open the included syntax file. */ rcstream = fopen(file, "rb"); if (rcstream == NULL) { rcfile_error(_("Error reading %s: %s"), file, strerror(errno)); return; } /* Use the name and line number position of the included syntax file * while parsing it, so we can know where any errors in it are. */ nanorc = file; lineno = 0; #ifdef DEBUG fprintf(stderr, "Parsing file \"%s\"\n", file); #endif parse_rcfile(rcstream, TRUE); } /* Expand globs in the passed name, and parse the resultant files. */ void parse_includes(char *ptr) { char *option, *nanorc_save = nanorc, *expanded; size_t lineno_save = lineno, i; glob_t files; option = ptr; if (*option == '"') option++; ptr = parse_argument(ptr); /* Expand tildes first, then the globs. */ expanded = real_dir_from_tilde(option); if (glob(expanded, GLOB_ERR|GLOB_NOSORT, NULL, &files) == 0) { for (i = 0; i < files.gl_pathc; ++i) parse_one_include(files.gl_pathv[i]); } else rcfile_error(_("Error expanding %s: %s"), option, strerror(errno)); globfree(&files); free(expanded); /* We're done with the included file(s). Restore the original * filename and line number position. */ nanorc = nanorc_save; lineno = lineno_save; } /* 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) { assert(colorname != NULL && bright != NULL); if (strncasecmp(colorname, "bright", 6) == 0) { *bright = TRUE; colorname += 6; } if (strcasecmp(colorname, "green") == 0) return COLOR_GREEN; else if (strcasecmp(colorname, "red") == 0) return COLOR_RED; else if (strcasecmp(colorname, "blue") == 0) return COLOR_BLUE; else if (strcasecmp(colorname, "white") == 0) return COLOR_WHITE; else if (strcasecmp(colorname, "yellow") == 0) return COLOR_YELLOW; else if (strcasecmp(colorname, "cyan") == 0) return COLOR_CYAN; else if (strcasecmp(colorname, "magenta") == 0) return COLOR_MAGENTA; else if (strcasecmp(colorname, "black") == 0) return COLOR_BLACK; 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 -1; } /* Parse the color string in the line at ptr, and add it to the current * file's associated colors. rex_flags are the regex compilation flags * to use, excluding or including REG_ICASE for case (in)sensitivity. */ void parse_colors(char *ptr, int rex_flags) { short fg, bg; bool bright = FALSE; char *fgstr; assert(ptr != NULL); if (!opensyntax) { rcfile_error( N_("A '%s' command requires a preceding 'syntax' command"), "color"); return; } if (*ptr == '\0') { rcfile_error(N_("Missing color name")); return; } fgstr = ptr; ptr = parse_next_word(ptr); if (!parse_color_names(fgstr, &fg, &bg, &bright)) return; if (*ptr == '\0') { rcfile_error(N_("Missing regex string after '%s' command"), "color"); return; } /* Now for the fun part. Start adding regexes to individual strings * in the colorstrings array, woo! */ while (ptr != NULL && *ptr != '\0') { colortype *newcolor = NULL; /* The container for a color plus its regexes. */ bool goodstart; /* Whether the start expression was valid. */ bool expectend = FALSE; /* Whether to 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; } fgstr = ++ptr; ptr = parse_next_regex(ptr); if (ptr == NULL) break; goodstart = nregcomp(fgstr, rex_flags); /* If the starting regex is valid, initialize a new color struct, * and hook it in at the tail of the linked list. */ if (goodstart) { newcolor = (colortype *)nmalloc(sizeof(colortype)); newcolor->fg = fg; newcolor->bg = bg; newcolor->bright = bright; newcolor->rex_flags = rex_flags; newcolor->start_regex = mallocstrcpy(NULL, fgstr); newcolor->start = NULL; newcolor->end_regex = NULL; newcolor->end = NULL; newcolor->next = NULL; #ifdef DEBUG fprintf(stderr, "Adding an entry for fg %hd, bg %hd\n", fg, bg); #endif if (lastcolor == NULL) live_syntax->color = newcolor; else lastcolor->next = newcolor; lastcolor = newcolor; } if (!expectend) continue; 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; } 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 (!goodstart) continue; /* If it's valid, save the ending regex string. */ if (nregcomp(fgstr, rex_flags)) newcolor->end_regex = mallocstrcpy(NULL, fgstr); /* Lame way to skip another static counter. */ newcolor->id = live_syntax->nmultis; live_syntax->nmultis++; } } /* Parse the color name, or pair of color names, in combostr. */ bool parse_color_names(char *combostr, short *fg, short *bg, bool *bright) { bool no_fgcolor = FALSE; if (combostr == NULL) return FALSE; if (strchr(combostr, ',') != NULL) { char *bgcolorname; strtok(combostr, ","); bgcolorname = strtok(NULL, ","); if (bgcolorname == NULL) { /* If we have a background color without a foreground color, * parse it properly. */ bgcolorname = combostr + 1; no_fgcolor = TRUE; } if (strncasecmp(bgcolorname, "bright", 6) == 0) { rcfile_error(N_("Background color \"%s\" cannot be bright"), bgcolorname); return FALSE; } *bg = color_to_short(bgcolorname, bright); } else *bg = -1; if (!no_fgcolor) { *fg = color_to_short(combostr, bright); /* Don't try to parse screwed-up foreground colors. */ if (*fg == -1) return FALSE; } else *fg = -1; return TRUE; } /* Read regex strings enclosed in double quotes from the line pointed at * by ptr, and store them quoteless in the passed storage place. */ void grab_and_store(const char *kind, char *ptr, regexlisttype **storage) { regexlisttype *lastthing; if (!opensyntax) { rcfile_error( N_("A '%s' command requires a preceding 'syntax' command"), kind); return; } /* The default syntax doesn't take any file matching stuff. */ if (strcmp(live_syntax->name, "default") == 0 && *ptr != '\0') { rcfile_error( N_("The \"default\" syntax does not accept '%s' regexes"), kind); return; } if (*ptr == '\0') { rcfile_error(N_("Missing regex string after '%s' command"), kind); return; } lastthing = *storage; /* If there was an earlier command, go to the last of those regexes. */ while (lastthing != NULL && lastthing->next != NULL) lastthing = lastthing->next; /* Now gather any valid regexes and add them to the linked list. */ while (*ptr != '\0') { const char *regexstring; regexlisttype *newthing; if (*ptr != '"') { rcfile_error( N_("Regex strings must begin and end with a \" character")); return; } regexstring = ++ptr; ptr = parse_next_regex(ptr); if (ptr == NULL) return; /* If the regex string is malformed, skip it. */ if (!nregcomp(regexstring, NANO_REG_EXTENDED | REG_NOSUB)) continue; /* Copy the regex into a struct, and hook this in at the end. */ newthing = (regexlisttype *)nmalloc(sizeof(regexlisttype)); newthing->full_regex = mallocstrcpy(NULL, regexstring); newthing->next = NULL; if (lastthing == NULL) *storage = newthing; else lastthing->next = newthing; lastthing = newthing; } } /* Parse and store the name given after a linter/formatter command. */ void pick_up_name(const char *kind, char *ptr, char **storage) { assert(ptr != NULL); if (!opensyntax) { rcfile_error( N_("A '%s' command requires a preceding 'syntax' command"), kind); return; } if (*ptr == '\0') { rcfile_error(N_("Missing command after '%s'"), kind); return; } free(*storage); /* Allow unsetting the command by using an empty string. */ if (!strcmp(ptr, "\"\"")) *storage = NULL; else if (*ptr == '"') { *storage = mallocstrcpy(NULL, ++ptr); char* q = *storage; char* p = *storage; /* Snip out the backslashes of escaped characters. */ while (*p != '"') { if (*p == '\0') { rcfile_error(N_("Argument of '%s' lacks closing \""), kind); free(*storage); *storage = NULL; return; } else if (*p == '\\' && *(p + 1) != '\0') { p++; } *q++ = *p++; } *q = '\0'; } else *storage = mallocstrcpy(NULL, ptr); } #endif /* !DISABLE_COLOR */ /* Verify that the user has not unmapped every shortcut for a * function that we consider 'vital' (such as "Exit"). */ static void check_vitals_mapped(void) { subnfunc *f; int v; #define VITALS 5 void (*vitals[VITALS])(void) = { do_exit, do_exit, do_cancel, do_cancel, do_cancel }; int inmenus[VITALS] = { MMAIN, MHELP, MWHEREIS, MREPLACE, MGOTOLINE }; for (v = 0; v < VITALS; v++) { for (f = allfuncs; f != NULL; f = f->next) { if (f->scfunc == vitals[v] && f->menus & inmenus[v]) { const sc *s = first_sc_for(inmenus[v], f->scfunc); if (!s) { fprintf(stderr, _("Fatal error: no keys mapped for function " "\"%s\". Exiting.\n"), f->desc); fprintf(stderr, _("If needed, use nano with the -I option " "to adjust your nanorc settings.\n")); exit(1); } break; } } } } /* Parse the rcfile, once it has been opened successfully at rcstream, * and close it afterwards. If syntax_only is TRUE, allow the file to * to contain only color syntax commands. */ void parse_rcfile(FILE *rcstream, bool syntax_only) { char *buf = NULL; ssize_t len; size_t n = 0; while ((len = getline(&buf, &n, rcstream)) > 0) { char *ptr, *keyword, *option; int set = 0; size_t i; /* Ignore the newline. */ if (buf[len - 1] == '\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); #ifndef DISABLE_COLOR /* Handle extending first... */ if (strcasecmp(keyword, "extendsyntax") == 0) { syntaxtype *sint; char *syntaxname = ptr; ptr = parse_next_word(ptr); for (sint = syntaxes; sint != NULL; sint = sint->next) if (!strcmp(sint->name, syntaxname)) break; if (sint == NULL) { rcfile_error(N_("Could not find syntax \"%s\" to extend"), syntaxname); opensyntax = FALSE; continue; } live_syntax = sint; opensyntax = TRUE; /* Refind the tail of the color list for this syntax. */ lastcolor = sint->color; if (lastcolor != NULL) while (lastcolor->next != NULL) lastcolor = lastcolor->next; keyword = ptr; ptr = parse_next_word(ptr); } /* Try to parse the keyword. */ if (strcasecmp(keyword, "syntax") == 0) { if (opensyntax && lastcolor == NULL) rcfile_error(N_("Syntax \"%s\" has no color commands"), live_syntax->name); parse_syntax(ptr); } else if (strcasecmp(keyword, "header") == 0) grab_and_store("header", ptr, &live_syntax->headers); else if (strcasecmp(keyword, "magic") == 0) #ifdef HAVE_LIBMAGIC grab_and_store("magic", ptr, &live_syntax->magics); #else ; #endif else if (strcasecmp(keyword, "comment") == 0) #ifdef ENABLE_COMMENT pick_up_name("comment", ptr, &live_syntax->comment); #else ; #endif else if (strcasecmp(keyword, "color") == 0) parse_colors(ptr, NANO_REG_EXTENDED); else if (strcasecmp(keyword, "icolor") == 0) parse_colors(ptr, NANO_REG_EXTENDED | REG_ICASE); else if (strcasecmp(keyword, "linter") == 0) pick_up_name("linter", ptr, &live_syntax->linter); else if (strcasecmp(keyword, "formatter") == 0) #ifndef DISABLE_SPELLER pick_up_name("formatter", ptr, &live_syntax->formatter); #else ; #endif else if (syntax_only) rcfile_error(N_("Command \"%s\" not allowed in included file"), keyword); else if (strcasecmp(keyword, "include") == 0) parse_includes(ptr); else #endif /* !DISABLE_COLOR */ if (strcasecmp(keyword, "set") == 0) set = 1; else if (strcasecmp(keyword, "unset") == 0) set = -1; else if (strcasecmp(keyword, "bind") == 0) parse_binding(ptr, TRUE); else if (strcasecmp(keyword, "unbind") == 0) parse_binding(ptr, FALSE); else rcfile_error(N_("Command \"%s\" not understood"), keyword); #ifndef DISABLE_COLOR /* If a syntax was extended, it stops at the end of the command. */ if (live_syntax != syntaxes) opensyntax = FALSE; #endif if (set == 0) continue; if (*ptr == '\0') { rcfile_error(N_("Missing option")); continue; } option = ptr; ptr = parse_next_word(ptr); /* Find the just read name among the existing options. */ for (i = 0; rcopts[i].name != NULL; i++) { if (strcasecmp(option, rcopts[i].name) == 0) break; } if (rcopts[i].name == NULL) { rcfile_error(N_("Unknown option \"%s\""), option); continue; } #ifdef DEBUG fprintf(stderr, " Option name = \"%s\"\n", rcopts[i].name); fprintf(stderr, " Flag = %ld\n", rcopts[i].flag); #endif /* First handle unsetting. */ if (set == -1) { if (rcopts[i].flag != 0) UNSET(rcopts[i].flag); else rcfile_error(N_("Cannot unset option \"%s\""), rcopts[i].name); continue; } /* If the option has a flag, it doesn't take an argument. */ if (rcopts[i].flag != 0) { SET(rcopts[i].flag); continue; } /* The option doesn't have a flag, so it takes an argument. */ if (*ptr == '\0') { rcfile_error(N_("Option \"%s\" requires an argument"), rcopts[i].name); continue; } option = ptr; if (*option == '"') option++; ptr = parse_argument(ptr); option = mallocstrcpy(NULL, option); #ifdef DEBUG fprintf(stderr, " Option argument = \"%s\"\n", option); #endif /* Make sure the option argument is a valid multibyte string. */ if (!is_valid_mbstring(option)) { rcfile_error(N_("Option is not a valid multibyte string")); continue; } #ifndef DISABLE_COLOR if (strcasecmp(rcopts[i].name, "titlecolor") == 0) specified_color_combo[TITLE_BAR] = option; else if (strcasecmp(rcopts[i].name, "numbercolor") == 0) specified_color_combo[LINE_NUMBER] = option; else if (strcasecmp(rcopts[i].name, "statuscolor") == 0) specified_color_combo[STATUS_BAR] = option; else if (strcasecmp(rcopts[i].name, "keycolor") == 0) specified_color_combo[KEY_COMBO] = option; else if (strcasecmp(rcopts[i].name, "functioncolor") == 0) specified_color_combo[FUNCTION_TAG] = option; else #endif #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\" is invalid"), option); wrap_at = -CHARS_FROM_EOL; } else { UNSET(NO_WRAP); 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 if (strcasecmp(rcopts[i].name, "wordchars") == 0) word_chars = 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\" is invalid"), option); tabsize = -1; } else free(option); } else assert(FALSE); } #ifndef DISABLE_COLOR if (opensyntax && lastcolor == NULL) rcfile_error(N_("Syntax \"%s\" has no color commands"), live_syntax->name); opensyntax = FALSE; #endif free(buf); fclose(rcstream); lineno = 0; return; } /* First read the system-wide rcfile, then the user's rcfile. */ void do_rcfile(void) { struct stat rcinfo; FILE *rcstream; nanorc = mallocstrcpy(nanorc, SYSCONFDIR "/nanorc"); /* Don't open directories, character files, or block files. */ if (stat(nanorc, &rcinfo) != -1) { if (S_ISDIR(rcinfo.st_mode) || S_ISCHR(rcinfo.st_mode) || S_ISBLK(rcinfo.st_mode)) rcfile_error(S_ISDIR(rcinfo.st_mode) ? _("\"%s\" is a directory") : _("\"%s\" is a device file"), nanorc); } #ifdef DEBUG fprintf(stderr, "Parsing file \"%s\"\n", nanorc); #endif /* Try to open the system-wide nanorc. */ rcstream = fopen(nanorc, "rb"); if (rcstream != NULL) parse_rcfile(rcstream, FALSE); /* When configured with --disable-wrapping-as-root, turn wrapping off * for root, so that only root's .nanorc or --fill can turn it on. */ #ifdef DISABLE_ROOTWRAPPING 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) + strlen(RCFILE_NAME) + 2); sprintf(nanorc, "%s/%s", homedir, RCFILE_NAME); /* Don't open directories, character files, or block files. */ if (stat(nanorc, &rcinfo) != -1) { if (S_ISDIR(rcinfo.st_mode) || S_ISCHR(rcinfo.st_mode) || S_ISBLK(rcinfo.st_mode)) rcfile_error(S_ISDIR(rcinfo.st_mode) ? _("\"%s\" is a directory") : _("\"%s\" is a device file"), nanorc); } /* Try to open the current user's nanorc. */ 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, FALSE); } check_vitals_mapped(); free(nanorc); nanorc = NULL; if (errors && !ISSET(QUIET)) { errors = FALSE; fprintf(stderr, _("\nPress Enter to continue starting nano.\n")); while (getchar() != '\n') ; } } #endif /* !DISABLE_NANORC */