/************************************************************************** * rcfile.c -- This file is part of GNU nano. * * * * Copyright (C) 2001-2011, 2013-2019 Free Software Foundation, Inc. * * Copyright (C) 2014 Mike Frysinger * * Copyright (C) 2019 Brand Huntsman * * Copyright (C) 2014-2019 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 #ifdef ENABLE_NANORC #ifndef RCFILE_NAME #define HOME_RC_NAME ".nanorc" #define RCFILE_NAME "nanorc" #else #define HOME_RC_NAME RCFILE_NAME #endif static const rcoption rcopts[] = { {"boldtext", BOLD_TEXT}, #ifdef ENABLE_JUSTIFY {"brackets", 0}, #endif #ifdef ENABLE_WRAPPING {"breaklonglines", BREAK_LONG_LINES}, #endif {"constantshow", CONSTANT_SHOW}, {"emptyline", EMPTY_LINE}, #ifdef ENABLED_WRAPORJUSTIFY {"fill", 0}, #endif #ifdef ENABLE_HISTORIES {"historylog", HISTORYLOG}, #endif {"jumpyscrolling", JUMPY_SCROLLING}, #ifdef ENABLE_LINENUMBERS {"linenumbers", LINE_NUMBERS}, #endif {"morespace", MORE_SPACE}, /* Deprecated; remove in 2021. */ #ifdef ENABLE_MOUSE {"mouse", USE_MOUSE}, #endif #ifdef ENABLE_MULTIBUFFER {"multibuffer", MULTIBUFFER}, #endif {"nohelp", NO_HELP}, {"nonewlines", NO_NEWLINES}, {"nopauses", NO_PAUSES}, #ifdef ENABLE_WRAPPING {"nowrap", NO_WRAP}, /* Deprecated; remove in 2021. */ #endif #ifdef ENABLE_OPERATINGDIR {"operatingdir", 0}, #endif #ifdef ENABLE_HISTORIES {"positionlog", POSITIONLOG}, #endif {"preserve", PRESERVE}, #ifdef ENABLE_JUSTIFY {"punct", 0}, {"quotestr", 0}, #endif {"quickblank", QUICK_BLANK}, {"rawsequences", RAW_SEQUENCES}, {"rebinddelete", REBIND_DELETE}, {"regexp", USE_REGEXP}, #ifdef ENABLE_SPELLER {"speller", 0}, #endif {"suspend", SUSPEND}, {"tabsize", 0}, {"tempfile", TEMP_FILE}, {"view", VIEW_MODE}, #ifndef NANO_TINY {"afterends", AFTER_ENDS}, {"allow_insecure_backup", INSECURE_BACKUP}, {"atblanks", AT_BLANKS}, {"autoindent", AUTOINDENT}, {"backup", BACKUP_FILE}, {"backupdir", 0}, {"casesensitive", CASE_SENSITIVE}, {"cutfromcursor", CUT_FROM_CURSOR}, {"guidestripe", 0}, {"locking", LOCKING}, {"matchbrackets", 0}, {"noconvert", NO_CONVERT}, {"showcursor", SHOW_CURSOR}, {"smarthome", SMART_HOME}, {"smooth", SMOOTH_SCROLL}, /* Deprecated; remove in 2021. */ {"softwrap", SOFTWRAP}, {"tabstospaces", TABS_TO_SPACES}, {"trimblanks", TRIM_BLANKS}, {"unix", MAKE_IT_UNIX}, {"whitespace", 0}, {"wordbounds", WORD_BOUNDS}, {"wordchars", 0}, {"zap", LET_THEM_ZAP}, #endif #ifdef ENABLE_COLOR {"titlecolor", 0}, {"numbercolor", 0}, {"stripecolor", 0}, {"selectedcolor", 0}, {"statuscolor", 0}, {"errorcolor", 0}, {"keycolor", 0}, {"functioncolor", 0}, #endif {NULL, 0} }; static size_t lineno = 0; /* The line number of the last encountered error. */ static char *nanorc = NULL; /* The path to the rcfile we're parsing. */ #ifdef ENABLE_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 static linestruct *errors_head = NULL; static linestruct *errors_tail = NULL; /* Beginning and end of a list of errors in rcfiles, if any. */ /* Send the gathered error messages (if any) to the terminal. */ void display_rcfile_errors() { for (linestruct *error = errors_head; error != NULL; error = error->next) fprintf(stderr, "%s\n", error->data); } #define MAXSIZE (PATH_MAX + 200) /* Report an error in an rcfile, printing it to stderr. */ void rcfile_error(const char *msg, ...) { linestruct *error = make_new_node(errors_tail); char textbuf[MAXSIZE]; int length = 0; va_list ap; if (errors_head == NULL) errors_head = error; else errors_tail->next = error; errors_tail = error; if (rcfile_with_errors == NULL) rcfile_with_errors = strdup(nanorc); if (lineno > 0) length = snprintf(textbuf, MAXSIZE, _("Error in %s on line %zu: "), nanorc, lineno); va_start(ap, msg); length += vsnprintf(textbuf + length, MAXSIZE - length, _(msg), ap); va_end(ap); error->data = nmalloc(length + 1); sprintf(error->data, "%s", textbuf); } #endif /* ENABLE_NANORC */ #if defined(ENABLE_NANORC) || defined(ENABLE_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((unsigned char)*ptr) && *ptr != '\0') ptr++; if (*ptr == '\0') return ptr; /* Null-terminate and advance ptr. */ *ptr++ = '\0'; while (isblank((unsigned char)*ptr)) ptr++; return ptr; } #endif /* ENABLE_NANORC || ENABLE_HISTORIES */ #ifdef ENABLE_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; if (*ptr != '"') return parse_next_word(ptr); while (*ptr != '\0') { if (*++ptr == '"') last_quote = ptr; } if (last_quote == NULL) { rcfile_error(N_("Argument '%s' has an unterminated \""), ptr_save); return NULL; } *last_quote = '\0'; ptr = last_quote + 1; while (isblank((unsigned char)*ptr)) ptr++; return ptr; } #ifdef ENABLE_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) { /* 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((unsigned char)ptr[1])))) ptr++; 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((unsigned char)*ptr)) ptr++; return ptr; } /* Compile the given regular expression and store the result in packed (when * this pointer is not NULL). Return TRUE when the expression is valid. */ bool compile(const char *expression, int rex_flags, regex_t **packed) { regex_t *compiled = nmalloc(sizeof(regex_t)); int outcome = regcomp(compiled, expression, rex_flags); if (outcome != 0) { size_t length = regerror(outcome, compiled, NULL, 0); char *message = charalloc(length); regerror(outcome, compiled, message, length); rcfile_error(N_("Bad regex \"%s\": %s"), expression, message); free(message); } if (packed == NULL || outcome != 0) { regfree(compiled); free(compiled); } else *packed = compiled; return (outcome == 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 begin_a_syntax(char *ptr, bool headers_only) { char *nameptr = ptr; opensyntax = FALSE; /* Check that the syntax name is not empty. */ if (*ptr == '\0' || (*ptr == '"' && (*(ptr + 1) == '\0' || *(ptr + 1) == '"'))) { rcfile_error(N_("Missing syntax name")); return; } ptr = parse_next_word(ptr); /* Check that quotes around the name are either paired or absent. */ if ((*nameptr == '\x22') ^ (nameptr[strlen(nameptr) - 1] == '\x22')) { rcfile_error(N_("Unpaired quote in syntax name")); return; } /* If the name is quoted, strip the quotes. */ if (*nameptr == '\x22') { nameptr++; 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->filename = strdup(nanorc); live_syntax->lineno = lineno; live_syntax->augmentations = NULL; live_syntax->extensions = NULL; live_syntax->headers = NULL; live_syntax->magics = NULL; live_syntax->linter = NULL; #ifdef ENABLE_COMMENT live_syntax->comment = mallocstrcpy(NULL, GENERAL_COMMENT_CHARACTER); #endif 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; /* 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 /* ENABLE_COLOR */ /* Return TRUE when the given function is present in almost all menus. */ bool is_universal(void (*func)(void)) { return (func == do_left || func == do_right || func == do_home || func == do_end || #ifndef NANO_TINY func == do_prev_word_void || func == do_next_word_void || #endif func == do_delete || func == do_backspace || func == cut_text || func == paste_text || func == do_tab || func == do_enter || func == do_verbatim_input); } /* 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; keystruct *s, *newsc = NULL; int menu, mask = 0; funcstruct *f; 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_things; } /* Uppercase only the first two or three characters of the key name. */ keycopy[0] = toupper((unsigned char)keycopy[0]); keycopy[1] = toupper((unsigned char)keycopy[1]); if (keycopy[0] == 'M' && keycopy[1] == '-') { if (strlen(keycopy) > 2) keycopy[2] = toupper((unsigned char)keycopy[2]); else { rcfile_error(N_("Key name is too short")); goto free_things; } } /* 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((unsigned char)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_things; } else if (keycode_from_string(keycopy) < 0) { rcfile_error(N_("Key name %s is invalid"), keycopy); goto free_things; } if (dobind) { funcptr = ptr; ptr = parse_argument(ptr); if (funcptr[0] == '\0') { rcfile_error(N_("Must specify a function to bind the key to")); goto free_things; } else if (ptr == NULL) goto free_things; } 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_things; } if (dobind) { /* If the thing to bind starts with a double quote, it is a string, * otherwise it is the name of a function. */ if (*funcptr == '"') { newsc = nmalloc(sizeof(keystruct)); newsc->func = (functionptrtype)implant; newsc->expansion = mallocstrcpy(NULL, funcptr + 1); #ifndef NANO_TINY newsc->toggle = 0; #endif } else newsc = strtosc(funcptr); if (newsc == NULL) { rcfile_error(N_("Cannot map name \"%s\" to a function"), funcptr); goto free_things; } } menu = name_to_menu(menuptr); if (menu < 1) { rcfile_error(N_("Cannot map name \"%s\" to a menu"), menuptr); goto free_things; } /* Wipe the given shortcut from the given menu. */ for (s = sclist; s != NULL; s = s->next) if ((s->menus & menu) && strcmp(s->keystr, keycopy) == 0) s->menus &= ~menu; /* When unbinding, we are done now. */ if (!dobind) goto free_things; /* Tally up the menus where the function exists. */ for (f = allfuncs; f != NULL; f = f->next) if (f->func == newsc->func) mask = mask | f->menus; #ifndef NANO_TINY /* Handle the special case of the toggles. */ if (newsc->func == do_toggle_void) mask = MMAIN; #endif #ifdef ENABLE_NANORC /* Handle the special case of a key defined as a string. */ if (newsc->func == (functionptrtype)implant) mask = MMOST | MHELP; #endif /* Now limit the given menu to those where the function exists. */ menu = menu & (is_universal(newsc->func) ? MMOST : mask); if (!menu) { if (!ISSET(RESTRICTED) && !ISSET(VIEW_MODE)) rcfile_error(N_("Function '%s' does not exist in menu '%s'"), funcptr, menuptr); goto free_things; } newsc->menus = menu; assign_keyinfo(newsc, keycopy, 0); /* Disallow rebinding ^[ and frequent escape-sequence starter "Esc [". */ if ((!newsc->meta && newsc->keycode == ESC_CODE) || (newsc->meta && newsc->keycode == '[')) { rcfile_error(N_("Keystroke %s may not be rebound"), keycopy); free_things: free(keycopy); free(newsc); return; } #ifndef NANO_TINY /* If this is a toggle, find and copy its sequence number. */ if (newsc->func == do_toggle_void) { for (s = sclist; s != NULL; s = s->next) if (s->func == 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; } /* Verify that the given file exists, is not a folder nor a device. */ bool is_good_file(char *file) { struct stat rcinfo; /* First check that the file exists and is readable. */ if (access(file, R_OK) != 0) return FALSE; /* If the thing exists, it may be neither a directory nor a device. */ 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 FALSE; } else return TRUE; } #ifdef ENABLE_COLOR /* Read and parse one included syntax file. */ void parse_one_include(char *file, syntaxtype *syntax) { augmentstruct *extra; FILE *rcstream; /* Don't open directories, character files, or block files. */ if (!is_good_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; /* If this is the first pass, parse only the prologue. */ if (syntax == NULL) { parse_rcfile(rcstream, TRUE, TRUE); return; } live_syntax = syntax; opensyntax = TRUE; lastcolor = NULL; /* Parse the included file fully. */ parse_rcfile(rcstream, TRUE, FALSE); opensyntax = TRUE; extra = syntax->augmentations; /* Apply any stored extendsyntax commands. */ while (extra != NULL) { char *keyword = extra->data; char *therest = parse_next_word(extra->data); nanorc = extra->filename; lineno = extra->lineno; if (!parse_syntax_commands(keyword, therest)) rcfile_error(N_("Command \"%s\" not understood"), keyword); extra = extra->next; } free(syntax->filename); syntax->filename = NULL; opensyntax = FALSE; } /* Expand globs in the passed name, and parse the resultant files. */ void parse_includes(char *ptr) { char *pattern, *expanded; char *was_nanorc = nanorc; size_t was_lineno = lineno; glob_t files; int result; pattern = ptr; if (*pattern == '"') pattern++; ptr = parse_argument(ptr); /* Expand a tilde first, then try to match the globbing pattern. */ expanded = real_dir_from_tilde(pattern); result = glob(expanded, GLOB_ERR, NULL, &files); /* If there are matches, process each of them. Otherwise, only * report an error if it's something other than zero matches. */ if (result == 0) { for (size_t i = 0; i < files.gl_pathc; ++i) parse_one_include(files.gl_pathv[i], NULL); } else if (result != GLOB_NOMATCH) rcfile_error(_("Error expanding %s: %s"), pattern, strerror(errno)); globfree(&files); free(expanded); /* We're done with the included file(s). Restore the original * filename and line number position. */ nanorc = was_nanorc; lineno = was_lineno; } /* 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) { if (strncasecmp(colorname, "bright", 6) == 0) { *bright = TRUE; colorname += 6; } else *bright = FALSE; 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; else if (strcasecmp(colorname, "normal") == 0) return USE_THE_DEFAULT; rcfile_error(N_("Color \"%s\" not understood"), colorname); return BAD_COLOR; } /* Parse the color name (or pair of color names) in the given string. * Return FALSE when any color name is invalid; otherwise return TRUE. */ bool parse_color_names(char *combostr, short *fg, short *bg, int *attributes) { char *comma = strchr(combostr, ','); bool bright; *attributes = A_NORMAL; if (comma != NULL) { *bg = color_to_short(comma + 1, &bright); if (bright) { rcfile_error(N_("A background color cannot be bright")); return FALSE; } if (*bg == BAD_COLOR) return FALSE; *comma = '\0'; } else *bg = USE_THE_DEFAULT; if (comma != combostr) { *fg = color_to_short(combostr, &bright); if (*fg == BAD_COLOR) return FALSE; if (bright) *attributes = A_BOLD; } else *fg = USE_THE_DEFAULT; return TRUE; } /* 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; int attributes; char *item; 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; } item = ptr; ptr = parse_next_word(ptr); if (!parse_color_names(item, &fg, &bg, &attributes)) 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; } item = ++ptr; ptr = parse_next_regex(ptr); if (ptr == NULL) break; if (*item == '\0') { rcfile_error(N_("Empty regex string")); goodstart = FALSE; } else { newcolor = (colortype *)nmalloc(sizeof(colortype)); goodstart = compile(item, rex_flags, &newcolor->start); } /* If the start regex is valid, fill in the rest of the data, and * hook the new color struct in at the tail of the linked list. */ if (goodstart) { newcolor->fg = fg; newcolor->bg = bg; newcolor->attributes = attributes; newcolor->end = NULL; newcolor->next = NULL; if (lastcolor == NULL) live_syntax->color = newcolor; else lastcolor->next = newcolor; lastcolor = newcolor; } else free(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; } item = ++ptr; ptr = parse_next_regex(ptr); if (ptr == NULL) break; if (*item == '\0') { rcfile_error(N_("Empty regex string")); continue; } /* If the start regex was invalid, the end regex cannot be saved. */ if (!goodstart) continue; /* Save the compiled ending regex (when it's valid). */ compile(item, rex_flags, &newcolor->end); /* Lame way to skip another static counter. */ newcolor->id = live_syntax->nmultis; live_syntax->nmultis++; } } /* Parse the argument of an interface color option. */ colortype *parse_interface_color(char *combostr) { colortype *trio = nmalloc(sizeof(colortype)); if (parse_color_names(combostr, &trio->fg, &trio->bg, &trio->attributes)) { free(combostr); return trio; } else { free(combostr); free(trio); return NULL; } } /* 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 (!compile(regexstring, NANO_REG_EXTENDED | REG_NOSUB, NULL)) 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; } } /* Gather and store the string after a comment/linter command. */ void pick_up_name(const char *kind, char *ptr, char **storage) { if (!opensyntax) { rcfile_error( N_("A '%s' command requires a preceding 'syntax' command"), kind); return; } if (*ptr == '\0') { rcfile_error(N_("Missing argument after '%s'"), kind); return; } /* If the argument starts with a quote, find the terminating quote. */ if (*ptr == '"') { char *look = ptr + strlen(ptr); while (*look != '"') { if (--look == ptr) { rcfile_error(N_("Argument of '%s' lacks closing \""), kind); return; } } *look = '\0'; ptr++; } *storage = mallocstrcpy(*storage, ptr); } #endif /* ENABLE_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) { funcstruct *f; int v; #define VITALS 3 void (*vitals[VITALS])(void) = { do_exit, do_exit, do_cancel }; int inmenus[VITALS] = { MMAIN, MHELP, MYESNO }; for (v = 0; v < VITALS; v++) { for (f = allfuncs; f != NULL; f = f->next) { if (f->func == vitals[v] && f->menus & inmenus[v]) { const keystruct *s = first_sc_for(inmenus[v], f->func); if (!s) { fprintf(stderr, _("No key is bound to function '%s' in " "menu '%s'. Exiting.\n"), f->desc, menu_to_name(inmenus[v])); fprintf(stderr, _("If needed, use nano with the -I option " "to adjust your nanorc settings.\n")); exit(1); } break; } } } } /* Parse syntax-only commands. */ bool parse_syntax_commands(char *keyword, char *ptr) { 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, "comment") == 0) { #ifdef ENABLE_COMMENT pick_up_name("comment", ptr, &live_syntax->comment); #endif } else if (strcasecmp(keyword, "linter") == 0) pick_up_name("linter", ptr, &live_syntax->linter); else return FALSE; return TRUE; } /* 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, bool headers_only) { bool seen_color_command = FALSE; 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++; /* If doing a full parse, skip to after the 'syntax' command. */ if (!headers_only && syntax_only && lineno <= live_syntax->lineno) continue; ptr = buf; while (isblank((unsigned char)*ptr)) ptr++; /* If the line is empty or a comment, skip to next line. */ if (*ptr == '\0' || *ptr == '#') continue; /* Otherwise, skip to the next space. */ keyword = ptr; ptr = parse_next_word(ptr); #ifdef ENABLE_COLOR /* Handle extending first... */ if (strcasecmp(keyword, "extendsyntax") == 0 && !syntax_only) { augmentstruct *newitem, *extra; char *syntaxname = ptr; syntaxtype *sint; 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; } /* Disallow extending a syntax that is defined in a main nanorc. */ if (sint->filename == NULL) { rcfile_error(N_("Only an 'include' syntax can be extended")); opensyntax = FALSE; continue; } newitem = nmalloc(sizeof(augmentstruct));; /* Store the content of an 'extendsyntax', for later parsing. */ newitem->filename = strdup(nanorc); newitem->lineno = lineno; newitem->data = strdup(ptr); newitem->next = NULL; if (sint->augmentations != NULL) { extra = sint->augmentations; while (extra->next != NULL) extra = extra->next; extra->next = newitem; } else sint->augmentations = newitem; continue; } /* Try to parse the keyword. */ if (strcasecmp(keyword, "syntax") == 0) { if (headers_only) { if (opensyntax && !seen_color_command) rcfile_error(N_("Syntax \"%s\" has no color commands"), live_syntax->name); begin_a_syntax(ptr, headers_only); seen_color_command = FALSE; } else break; } else if (strcasecmp(keyword, "header") == 0) { if (headers_only) grab_and_store("header", ptr, &live_syntax->headers); } else if (strcasecmp(keyword, "magic") == 0) { #ifdef HAVE_LIBMAGIC if (headers_only) grab_and_store("magic", ptr, &live_syntax->magics); #endif } else if (syntax_only && (strcasecmp(keyword, "set") == 0 || strcasecmp(keyword, "unset") == 0 || strcasecmp(keyword, "bind") == 0 || strcasecmp(keyword, "unbind") == 0 || strcasecmp(keyword, "include") == 0 || strcasecmp(keyword, "extendsyntax") == 0)) { if (headers_only) rcfile_error(N_("Command \"%s\" not allowed in included file"), keyword); else break; } else if (headers_only && opensyntax && (strcasecmp(keyword, "color") == 0 || strcasecmp(keyword, "icolor") == 0)) { seen_color_command = TRUE; continue; } else if (headers_only && opensyntax && (strcasecmp(keyword, "comment") == 0 || strcasecmp(keyword, "linter") == 0)) { continue; } else if (parse_syntax_commands(keyword, ptr)) ; else if (strcasecmp(keyword, "include") == 0) parse_includes(ptr); else #endif /* ENABLE_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 if (headers_only) rcfile_error(N_("Command \"%s\" not understood"), keyword); #ifdef ENABLE_COLOR /* If a syntax was extended, it stops at the end of the command. */ if (!syntax_only && 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; } /* 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 ENABLE_UTF8 /* When in a UTF-8 locale, ignore arguments with invalid sequences. */ if (using_utf8() && mbstowcs(NULL, option, 0) == (size_t)-1) { rcfile_error(N_("Argument is not a valid multibyte string")); continue; } #endif #ifdef ENABLE_COLOR if (strcasecmp(rcopts[i].name, "titlecolor") == 0) color_combo[TITLE_BAR] = parse_interface_color(option); else if (strcasecmp(rcopts[i].name, "numbercolor") == 0) color_combo[LINE_NUMBER] = parse_interface_color(option); else if (strcasecmp(rcopts[i].name, "stripecolor") == 0) color_combo[GUIDE_STRIPE] = parse_interface_color(option); else if (strcasecmp(rcopts[i].name, "selectedcolor") == 0) color_combo[SELECTED_TEXT] = parse_interface_color(option); else if (strcasecmp(rcopts[i].name, "statuscolor") == 0) color_combo[STATUS_BAR] = parse_interface_color(option); else if (strcasecmp(rcopts[i].name, "errorcolor") == 0) color_combo[ERROR_MESSAGE] = parse_interface_color(option); else if (strcasecmp(rcopts[i].name, "keycolor") == 0) color_combo[KEY_COMBO] = parse_interface_color(option); else if (strcasecmp(rcopts[i].name, "functioncolor") == 0) color_combo[FUNCTION_TAG] = parse_interface_color(option); else #endif #ifdef ENABLE_OPERATINGDIR if (strcasecmp(rcopts[i].name, "operatingdir") == 0) operating_dir = option; else #endif #ifdef ENABLED_WRAPORJUSTIFY if (strcasecmp(rcopts[i].name, "fill") == 0) { if (!parse_num(option, &fill)) { rcfile_error(N_("Requested fill size \"%s\" is invalid"), option); fill = -COLUMNS_FROM_EOL; } free(option); } else #endif #ifndef NANO_TINY if (strcasecmp(rcopts[i].name, "guidestripe") == 0) { if (!parse_num(option, &stripe_column) || stripe_column <= 0) { rcfile_error(N_("Guide column \"%s\" is invalid"), option); stripe_column = 0; } free(option); } else if (strcasecmp(rcopts[i].name, "matchbrackets") == 0) { if (has_blank_char(option)) { rcfile_error(N_("Non-blank characters required")); free(option); } else if (mbstrlen(option) % 2 != 0) { rcfile_error(N_("Even number of characters required")); free(option); } else matchbrackets = option; } else if (strcasecmp(rcopts[i].name, "whitespace") == 0) { if (mbstrlen(option) != 2 || breadth(option) != 2) { rcfile_error(N_("Two single-column characters required")); free(option); } else { whitespace = option; whitelen[0] = char_length(whitespace); whitelen[1] = char_length(whitespace + whitelen[0]); } } else #endif #ifdef ENABLE_JUSTIFY if (strcasecmp(rcopts[i].name, "punct") == 0) { if (has_blank_char(option)) { rcfile_error(N_("Non-blank characters required")); free(option); } else punct = option; } else if (strcasecmp(rcopts[i].name, "brackets") == 0) { if (has_blank_char(option)) { rcfile_error(N_("Non-blank characters required")); free(option); } else brackets = option; } 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 #ifdef ENABLE_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; } free(option); } } #ifdef ENABLE_COLOR if (headers_only && !seen_color_command) rcfile_error(N_("Syntax \"%s\" has no color commands"), live_syntax->name); opensyntax = FALSE; #endif free(buf); fclose(rcstream); lineno = 0; return; } /* Read and interpret one of the two nanorc files. */ void parse_one_nanorc(void) { FILE *rcstream; /* Don't try to open directories nor devices. */ if (!is_good_file(nanorc)) return; rcstream = fopen(nanorc, "rb"); /* If opening the file succeeded, parse it. Otherwise, only * complain if the file actually exists. */ if (rcstream != NULL) parse_rcfile(rcstream, FALSE, TRUE); else if (errno != ENOENT) rcfile_error(N_("Error reading %s: %s"), nanorc, strerror(errno)); } bool have_nanorc(const char *path, char *name) { if (path == NULL) return FALSE; free(nanorc); nanorc = concatenate(path, name); return is_good_file(nanorc); } /* First read the system-wide rcfile, then the user's rcfile. */ void do_rcfiles(void) { const char *xdgconfdir; /* First process the system-wide nanorc, if there is one. */ nanorc = mallocstrcpy(nanorc, SYSCONFDIR "/nanorc"); parse_one_nanorc(); get_homedir(); xdgconfdir = getenv("XDG_CONFIG_HOME"); /* Now try the to find a nanorc file in the user's home directory or in * the XDG configuration directories, and process the first one found. */ if (have_nanorc(homedir, "/" HOME_RC_NAME)) parse_one_nanorc(); else if (have_nanorc(xdgconfdir, "/nano/" RCFILE_NAME)) parse_one_nanorc(); else if (have_nanorc(homedir, "/.config/nano/" RCFILE_NAME)) parse_one_nanorc(); else if (homedir == NULL && xdgconfdir == NULL) rcfile_error(N_("I can't find my home directory! Wah!")); check_vitals_mapped(); free(nanorc); } #endif /* ENABLE_NANORC */