/* $Id: rcfile.c 5134 2015-03-08 15:42:52Z bens $ */ /************************************************************************** * rcfile.c * * * * Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, * * 2010, 2011, 2013, 2014 Free Software Foundation, Inc. * * 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 3, 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 #include #include #include #include #include #include #ifndef DISABLE_NANORC static const rcoption rcopts[] = { {"boldtext", BOLD_TEXT}, #ifndef DISABLE_JUSTIFY {"brackets", 0}, #endif {"const", CONST_UPDATE}, #ifndef DISABLE_WRAPJUSTIFY {"fill", 0}, #endif #ifndef NANO_TINY {"locking", LOCKING}, #endif #ifndef DISABLE_MOUSE {"mouse", USE_MOUSE}, #endif #ifndef DISABLE_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}, {"allow_insecure_backup", INSECURE_BACKUP}, {"backupdir", 0}, {"backwards", BACKWARDS_SEARCH}, {"casesensitive", CASE_SENSITIVE}, {"cut", CUT_TO_END}, {"historylog", HISTORYLOG}, {"matchbrackets", 0}, {"noconvert", NO_CONVERT}, {"poslog", POS_HISTORY}, {"quiet", QUIET}, {"quickblank", QUICK_BLANK}, {"smarthome", SMART_HOME}, {"smooth", SMOOTH_SCROLL}, {"tabstospaces", TABS_TO_SPACES}, {"whitespace", 0}, {"wordbounds", WORD_BOUNDS}, {"softwrap", SOFTWRAP}, #endif #ifndef DISABLE_COLOR {"titlecolor", 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 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. 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 /* 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; const char *r = fixbounds(regex); int rc = regcomp(&preg, r, 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"), r, 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; syntaxtype *tmpsyntax, *prev_syntax; regexlisttype *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; /* Search for a duplicate syntax name. If we find one, free it, so * that we always use the last syntax with a given name. */ prev_syntax = NULL; for (tmpsyntax = syntaxes; tmpsyntax != NULL; tmpsyntax = tmpsyntax->next) { if (strcmp(nameptr, tmpsyntax->desc) == 0) { syntaxtype *old_syntax = tmpsyntax; if (endsyntax == tmpsyntax) endsyntax = prev_syntax; tmpsyntax = tmpsyntax->next; if (prev_syntax != NULL) prev_syntax->next = tmpsyntax; else syntaxes = tmpsyntax; free(old_syntax->desc); free(old_syntax); break; } prev_syntax = tmpsyntax; } 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->headers = NULL; endsyntax->magics = NULL; endsyntax->next = NULL; endsyntax->nmultis = 0; endsyntax->linter = NULL; endsyntax->formatter = 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 extension regexes into their part of the struct. */ while (*ptr != '\0') { regexlisttype *newext; while (*ptr != '"' && *ptr != '\0') ptr++; if (*ptr == '\0') return; ptr++; fileregptr = ptr; ptr = parse_next_regex(ptr); if (ptr == NULL) break; newext = (regexlisttype *)nmalloc(sizeof(regexlisttype)); /* 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); } } #endif /* !DISABLE_COLOR */ int check_bad_binding(sc *s) { #define BADLISTLEN 1 key_type badtypes[BADLISTLEN] = {META}; int badseqs[BADLISTLEN] = { 91 }; int i; for (i = 0; i < BADLISTLEN; i++) if (s->type == badtypes[i] && s->seq == badseqs[i]) return 1; return 0; } /* 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 || #ifndef NANO_TINY func == do_prev_word_void || func == do_next_word_void || #endif 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")); return; } /* 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")); return; } } /* 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\"")); return; } 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")); return; } } 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")); return; } if (dobind) { newsc = strtosc(funcptr); if (newsc == NULL) { rcfile_error(N_("Cannot map name \"%s\" to a function"), funcptr); return; } } menu = strtomenu(menuptr); if (menu < 1) { rcfile_error(N_("Cannot map name \"%s\" to a menu"), menuptr); return; } #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; /* Handle the special case of the toggles. */ if (newsc->scfunc == do_toggle_void) mask = MMAIN; /* 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); return; } newsc->keystr = keycopy; newsc->menu = menu; newsc->type = strtokeytype(newsc->keystr); assign_keyinfo(newsc); #ifdef DEBUG fprintf(stderr, "s->keystr = \"%s\"\n", newsc->keystr); fprintf(stderr, "s->seq = \"%d\"\n", newsc->seq); #endif if (check_bad_binding(newsc)) { rcfile_error(N_("Sorry, keystroke \"%s\" may not be rebound"), newsc->keystr); free(newsc); return; } } /* Now find and delete any existing same shortcut in the menu(s). */ for (s = sclist; s != NULL; s = s->next) { if (((s->menu & menu)) && !strcmp(s->keystr, keycopy)) { #ifdef DEBUG fprintf(stderr, "deleting entry from menu %x\n", s->menu); #endif s->menu &= ~menu; } } if (dobind) { /* Add the new shortcut at the start of the list. */ newsc->next = sclist; sclist = newsc; } } #ifndef DISABLE_COLOR /* Read and parse additional syntax files. */ static void _parse_include(char *file) { struct stat rcinfo; FILE *rcstream; /* Can't get the specified file's full path because it may screw up * our cwd depending on the parent directories' permissions (see * Savannah bug #25297). */ /* Don't open directories, character files, or block files. */ if (stat(file, &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"), file); } } /* Open the new syntax file. */ if ((rcstream = fopen(file, "rb")) == NULL) { rcfile_error(_("Error reading %s: %s"), file, strerror(errno)); return; } /* Use the name and line number position of the new 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 #ifndef DISABLE_COLOR , TRUE #endif ); } void parse_include(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_include(files.gl_pathv[i]); } else { rcfile_error(_("Error expanding %s: %s"), option, strerror(errno)); } globfree(&files); free(expanded); /* We're done with the new syntax file. 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) { 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 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; char *fgstr; assert(ptr != NULL); if (syntaxes == NULL) { rcfile_error( N_("Cannot add a color command without a syntax command")); 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")); 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 container for a color plus its regexes. */ 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 /* Need to recompute endcolor now so we can extend * colors to syntaxes. */ for (endcolor = endsyntax->color; endcolor->next != NULL; endcolor = endcolor->next) ; 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; /* Lame way to skip another static counter. */ newcolor->id = endsyntax->nmultis; endsyntax->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; } /* Parse the header-line regexes that may influence the choice of syntax. */ void parse_header_exp(char *ptr) { regexlisttype *endheader = NULL; assert(ptr != NULL); if (syntaxes == NULL) { rcfile_error( N_("Cannot add a header regex without a syntax command")); return; } if (*ptr == '\0') { rcfile_error(N_("Missing regex string")); return; } while (*ptr != '\0') { const char *regexstring; regexlisttype *newheader; if (*ptr != '"') { rcfile_error( N_("Regex strings must begin and end with a \" character")); ptr = parse_next_regex(ptr); continue; } ptr++; regexstring = ptr; ptr = parse_next_regex(ptr); if (ptr == NULL) break; newheader = (regexlisttype *)nmalloc(sizeof(regexlisttype)); /* Save the regex string if it's valid. */ if (nregcomp(regexstring, 0)) { newheader->ext_regex = mallocstrcpy(NULL, regexstring); newheader->ext = NULL; if (endheader == NULL) endsyntax->headers = newheader; else endheader->next = newheader; endheader = newheader; endheader->next = NULL; } else free(newheader); } } #ifndef DISABLE_COLOR /* Parse the magic regexes that may influence the choice of syntax. */ void parse_magic_exp(char *ptr) { #ifdef HAVE_LIBMAGIC regexlisttype *endmagic = NULL; assert(ptr != NULL); if (syntaxes == NULL) { rcfile_error( N_("Cannot add a magic string regex without a syntax command")); return; } if (*ptr == '\0') { rcfile_error(N_("Missing magic string name")); return; } if (*ptr != '"') { rcfile_error( N_("Regex strings must begin and end with a \" character")); return; } #ifdef DEBUG fprintf(stderr, "Starting a magic type: \"%s\"\n", ptr); #endif /* Now load the magic regexes into their part of the struct. */ while (*ptr != '\0') { const char *regexstring; regexlisttype *newmagic; while (*ptr != '"' && *ptr != '\0') ptr++; if (*ptr == '\0') return; ptr++; regexstring = ptr; ptr = parse_next_regex(ptr); if (ptr == NULL) break; newmagic = (regexlisttype *)nmalloc(sizeof(regexlisttype)); /* Save the regex string if it's valid. */ if (nregcomp(regexstring, REG_NOSUB)) { newmagic->ext_regex = mallocstrcpy(NULL, regexstring); newmagic->ext = NULL; if (endmagic == NULL) endsyntax->magics = newmagic; else endmagic->next = newmagic; endmagic = newmagic; endmagic->next = NULL; } else free(newmagic); } #endif /* HAVE_LIBMAGIC */ } #endif /* !DISABLE_COLOR */ /* Parse the linter requested for this syntax. Simple? */ void parse_linter(char *ptr) { assert(ptr != NULL); if (syntaxes == NULL) { rcfile_error( N_("Cannot add a linter without a syntax command")); return; } if (*ptr == '\0') { rcfile_error(N_("Missing linter command")); return; } if (endsyntax->linter != NULL) free(endsyntax->linter); /* Let them unset the linter by using "". */ if (!strcmp(ptr, "\"\"")) endsyntax->linter = NULL; else endsyntax->linter = mallocstrcpy(syntaxes->linter, ptr); } void parse_formatter(char *ptr) { assert(ptr != NULL); if (syntaxes == NULL) { rcfile_error( N_("Cannot add formatter without a syntax command")); return; } if (*ptr == '\0') { rcfile_error(N_("Missing formatter command")); return; } if (endsyntax->formatter != NULL) free(endsyntax->formatter); /* Let them unset the formatter by using "". */ if (!strcmp(ptr, "\"\"")) endsyntax->formatter = NULL; else endsyntax->formatter = mallocstrcpy(syntaxes->formatter, ptr); } #endif /* !DISABLE_COLOR */ /* Check whether the user has unmapped every shortcut for a * sequence we consider 'vital', like the exit function. */ 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, only allow the file * to contain color syntax commands: syntax, color, and icolor. */ void parse_rcfile(FILE *rcstream #ifndef DISABLE_COLOR , bool syntax_only #endif ) { char *buf = NULL; ssize_t len; size_t n = 0; #ifndef DISABLE_COLOR syntaxtype *end_syn_save = NULL; #endif 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) { char *syntaxname = ptr; syntaxtype *ts = NULL; ptr = parse_next_word(ptr); for (ts = syntaxes; ts != NULL; ts = ts->next) if (!strcmp(ts->desc, syntaxname)) break; if (ts == NULL) { rcfile_error(N_("Could not find syntax \"%s\" to extend"), syntaxname); continue; } else { end_syn_save = endsyntax; endsyntax = ts; keyword = ptr; ptr = parse_next_word(ptr); } } #endif /* Try to parse the keyword. */ if (strcasecmp(keyword, "set") == 0) { #ifndef DISABLE_COLOR if (syntax_only) rcfile_error( N_("Command \"%s\" not allowed in included file"), keyword); else #endif set = 1; } else if (strcasecmp(keyword, "unset") == 0) { #ifndef DISABLE_COLOR if (syntax_only) rcfile_error( N_("Command \"%s\" not allowed in included file"), keyword); else #endif set = -1; } #ifndef DISABLE_COLOR else if (strcasecmp(keyword, "include") == 0) { if (syntax_only) rcfile_error( N_("Command \"%s\" not allowed in included file"), keyword); else parse_include(ptr); } else if (strcasecmp(keyword, "syntax") == 0) { if (endsyntax != NULL && endcolor == NULL) rcfile_error(N_("Syntax \"%s\" has no color commands"), endsyntax->desc); parse_syntax(ptr); } else if (strcasecmp(keyword, "magic") == 0) parse_magic_exp(ptr); else if (strcasecmp(keyword, "header") == 0) parse_header_exp(ptr); else if (strcasecmp(keyword, "color") == 0) parse_colors(ptr, FALSE); else if (strcasecmp(keyword, "icolor") == 0) parse_colors(ptr, TRUE); else if (strcasecmp(keyword, "linter") == 0) parse_linter(ptr); else if (strcasecmp(keyword, "formatter") == 0) parse_formatter(ptr); #endif /* !DISABLE_COLOR */ 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 we temporarily reset endsyntax to allow extending, * restore the value here. */ if (end_syn_save != NULL) { endsyntax = end_syn_save; end_syn_save = NULL; } #endif if (set == 0) continue; if (*ptr == '\0') { rcfile_error(N_("Missing option")); 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 * 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_COLOR if (strcasecmp(rcopts[i].name, "titlecolor") == 0) specified_color_combo[TITLE_BAR] = 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 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\" is 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 option \"%s\""), rcopts[i].name); break; } } if (rcopts[i].name == NULL) rcfile_error(N_("Unknown option \"%s\""), option); } #ifndef DISABLE_COLOR if (endsyntax != NULL && endcolor == NULL) rcfile_error(N_("Syntax \"%s\" has no color commands"), endsyntax->desc); #endif free(buf); fclose(rcstream); lineno = 0; check_vitals_mapped(); return; } /* The main rcfile function. It tries to open the system-wide rcfile, * followed by the current 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 #ifndef DISABLE_COLOR , FALSE #endif ); #ifdef DISABLE_ROOTWRAPPING /* 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 { #ifndef RCFILE_NAME #define RCFILE_NAME ".nanorc" #endif 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 #ifndef DISABLE_COLOR , FALSE #endif ); } 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 */