/* $Id$ */ /************************************************************************** * nano.c * * * * Copyright (C) 1999-2004 Chris Allegretta * * Copyright (C) 2005-2006 David Lawrence Ramsey * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation; either version 2, or (at your option) * * any later version. * * * * This program is distributed in the hope that it will be useful, but * * WITHOUT ANY WARRANTY; without even the implied warranty of * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * * General Public License for more details. * * * * You should have received a copy of the GNU General Public License * * along with this program; if not, write to the Free Software * * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * * 02110-1301, USA. * * * **************************************************************************/ #include "proto.h" #include #include #include #include #include #include #include #include #include #include #include #ifdef HAVE_GETOPT_H #include #endif #ifdef ENABLE_NANORC static bool no_rcfiles = FALSE; /* Should we ignore all rcfiles? */ #endif static struct termios oldterm; /* The user's original terminal settings. */ static struct sigaction act; /* For all our fun signal handlers. */ /* Create a new filestruct node. Note that we specifically do not set * prevnode->next equal to the new line. */ filestruct *make_new_node(filestruct *prevnode) { filestruct *newnode = (filestruct *)nmalloc(sizeof(filestruct)); newnode->data = NULL; newnode->prev = prevnode; newnode->next = NULL; newnode->lineno = (prevnode != NULL) ? prevnode->lineno + 1 : 1; return newnode; } /* Make a copy of a filestruct node. */ filestruct *copy_node(const filestruct *src) { filestruct *dst; assert(src != NULL); dst = (filestruct *)nmalloc(sizeof(filestruct)); dst->data = mallocstrcpy(NULL, src->data); dst->next = src->next; dst->prev = src->prev; dst->lineno = src->lineno; return dst; } /* Splice a node into an existing filestruct. */ void splice_node(filestruct *begin, filestruct *newnode, filestruct *end) { assert(newnode != NULL && begin != NULL); newnode->next = end; newnode->prev = begin; begin->next = newnode; if (end != NULL) end->prev = newnode; } /* Unlink a node from the rest of the filestruct. */ void unlink_node(const filestruct *fileptr) { assert(fileptr != NULL); if (fileptr->prev != NULL) fileptr->prev->next = fileptr->next; if (fileptr->next != NULL) fileptr->next->prev = fileptr->prev; } /* Delete a node from the filestruct. */ void delete_node(filestruct *fileptr) { assert(fileptr != NULL && fileptr->data != NULL); if (fileptr->data != NULL) free(fileptr->data); free(fileptr); } /* Duplicate a whole filestruct. */ filestruct *copy_filestruct(const filestruct *src) { filestruct *head, *copy; assert(src != NULL); copy = copy_node(src); copy->prev = NULL; head = copy; src = src->next; while (src != NULL) { copy->next = copy_node(src); copy->next->prev = copy; copy = copy->next; src = src->next; } copy->next = NULL; return head; } /* Free a filestruct. */ void free_filestruct(filestruct *src) { assert(src != NULL); while (src->next != NULL) { src = src->next; delete_node(src->prev); } delete_node(src); } /* Renumber all entries in a filestruct, starting with fileptr. */ void renumber(filestruct *fileptr) { ssize_t line; assert(fileptr != NULL); line = (fileptr->prev == NULL) ? 0 : fileptr->prev->lineno; assert(fileptr != fileptr->next); for (; fileptr != NULL; fileptr = fileptr->next) fileptr->lineno = ++line; } /* Partition a filestruct so it begins at (top, top_x) and ends at (bot, * bot_x). */ partition *partition_filestruct(filestruct *top, size_t top_x, filestruct *bot, size_t bot_x) { partition *p; assert(top != NULL && bot != NULL && openfile->fileage != NULL && openfile->filebot != NULL); /* Initialize the partition. */ p = (partition *)nmalloc(sizeof(partition)); /* If the top and bottom of the partition are different from the top * and bottom of the filestruct, save the latter and then set them * to top and bot. */ if (top != openfile->fileage) { p->fileage = openfile->fileage; openfile->fileage = top; } else p->fileage = NULL; if (bot != openfile->filebot) { p->filebot = openfile->filebot; openfile->filebot = bot; } else p->filebot = NULL; /* Save the line above the top of the partition, detach the top of * the partition from it, and save the text before top_x in * top_data. */ p->top_prev = top->prev; top->prev = NULL; p->top_data = mallocstrncpy(NULL, top->data, top_x + 1); p->top_data[top_x] = '\0'; /* Save the line below the bottom of the partition, detach the * bottom of the partition from it, and save the text after bot_x in * bot_data. */ p->bot_next = bot->next; bot->next = NULL; p->bot_data = mallocstrcpy(NULL, bot->data + bot_x); /* Remove all text after bot_x at the bottom of the partition. */ null_at(&bot->data, bot_x); /* Remove all text before top_x at the top of the partition. */ charmove(top->data, top->data + top_x, strlen(top->data) - top_x + 1); align(&top->data); /* Return the partition. */ return p; } /* Unpartition a filestruct so it begins at (fileage, 0) and ends at * (filebot, strlen(filebot->data)) again. */ void unpartition_filestruct(partition **p) { char *tmp; assert(p != NULL && openfile->fileage != NULL && openfile->filebot != NULL); /* Reattach the line above the top of the partition, and restore the * text before top_x from top_data. Free top_data when we're done * with it. */ tmp = mallocstrcpy(NULL, openfile->fileage->data); openfile->fileage->prev = (*p)->top_prev; if (openfile->fileage->prev != NULL) openfile->fileage->prev->next = openfile->fileage; openfile->fileage->data = charealloc(openfile->fileage->data, strlen((*p)->top_data) + strlen(openfile->fileage->data) + 1); strcpy(openfile->fileage->data, (*p)->top_data); free((*p)->top_data); strcat(openfile->fileage->data, tmp); free(tmp); /* Reattach the line below the bottom of the partition, and restore * the text after bot_x from bot_data. Free bot_data when we're * done with it. */ openfile->filebot->next = (*p)->bot_next; if (openfile->filebot->next != NULL) openfile->filebot->next->prev = openfile->filebot; openfile->filebot->data = charealloc(openfile->filebot->data, strlen(openfile->filebot->data) + strlen((*p)->bot_data) + 1); strcat(openfile->filebot->data, (*p)->bot_data); free((*p)->bot_data); /* Restore the top and bottom of the filestruct, if they were * different from the top and bottom of the partition. */ if ((*p)->fileage != NULL) openfile->fileage = (*p)->fileage; if ((*p)->filebot != NULL) openfile->filebot = (*p)->filebot; /* Uninitialize the partition. */ free(*p); *p = NULL; } /* Move all the text between (top, top_x) and (bot, bot_x) in the * current filestruct to a filestruct beginning with file_top and ending * with file_bot. If no text is between (top, top_x) and (bot, bot_x), * don't do anything. */ void move_to_filestruct(filestruct **file_top, filestruct **file_bot, filestruct *top, size_t top_x, filestruct *bot, size_t bot_x) { filestruct *top_save; bool edittop_inside; #ifndef NANO_TINY bool mark_inside = FALSE; #endif assert(file_top != NULL && file_bot != NULL && top != NULL && bot != NULL); /* If (top, top_x)-(bot, bot_x) doesn't cover any text, get out. */ if (top == bot && top_x == bot_x) return; /* Partition the filestruct so that it contains only the text from * (top, top_x) to (bot, bot_x), keep track of whether the top of * the edit window is inside the partition, and keep track of * whether the mark begins inside the partition. */ filepart = partition_filestruct(top, top_x, bot, bot_x); edittop_inside = (openfile->edittop->lineno >= openfile->fileage->lineno && openfile->edittop->lineno <= openfile->filebot->lineno); #ifndef NANO_TINY if (openfile->mark_set) mark_inside = (openfile->mark_begin->lineno >= openfile->fileage->lineno && openfile->mark_begin->lineno <= openfile->filebot->lineno && (openfile->mark_begin != openfile->fileage || openfile->mark_begin_x >= top_x) && (openfile->mark_begin != openfile->filebot || openfile->mark_begin_x <= bot_x)); #endif /* Get the number of characters in the text, and subtract it from * totsize. */ openfile->totsize -= get_totsize(top, bot); if (*file_top == NULL) { /* If file_top is empty, just move all the text directly into * it. This is equivalent to tacking the text in top onto the * (lack of) text at the end of file_top. */ *file_top = openfile->fileage; *file_bot = openfile->filebot; /* Renumber starting with file_top. */ renumber(*file_top); } else { filestruct *file_bot_save = *file_bot; /* Otherwise, tack the text in top onto the text at the end of * file_bot. */ (*file_bot)->data = charealloc((*file_bot)->data, strlen((*file_bot)->data) + strlen(openfile->fileage->data) + 1); strcat((*file_bot)->data, openfile->fileage->data); /* Attach the line after top to the line after file_bot. Then, * if there's more than one line after top, move file_bot down * to bot. */ (*file_bot)->next = openfile->fileage->next; if ((*file_bot)->next != NULL) { (*file_bot)->next->prev = *file_bot; *file_bot = openfile->filebot; } /* Renumber starting with the line after the original * file_bot. */ if (file_bot_save->next != NULL) renumber(file_bot_save->next); } /* Since the text has now been saved, remove it from the filestruct. * If the mark begins inside the partition, set the beginning of the * mark to where the saved text used to start. */ openfile->fileage = (filestruct *)nmalloc(sizeof(filestruct)); openfile->fileage->data = mallocstrcpy(NULL, ""); openfile->filebot = openfile->fileage; #ifndef NANO_TINY if (mark_inside) { openfile->mark_begin = openfile->fileage; openfile->mark_begin_x = top_x; } #endif /* Restore the current line and cursor position. */ openfile->current = openfile->fileage; openfile->current_x = top_x; top_save = openfile->fileage; /* Unpartition the filestruct so that it contains all the text * again, minus the saved text. */ unpartition_filestruct(&filepart); /* If the top of the edit window was inside the old partition, put * it in range of current. */ if (edittop_inside) edit_update( #ifndef NANO_TINY ISSET(SMOOTH_SCROLL) ? NONE : #endif CENTER); /* Renumber starting with the beginning line of the old * partition. */ renumber(top_save); /* If the NO_NEWLINES flag isn't set, and the text doesn't end with * a magicline, add a new magicline. */ if (!ISSET(NO_NEWLINES) && openfile->filebot->data[0] != '\0') new_magicline(); } /* Copy all the text from the filestruct beginning with file_top and * ending with file_bot to the current filestruct at the current cursor * position. */ void copy_from_filestruct(filestruct *file_top, filestruct *file_bot) { filestruct *top_save; bool edittop_inside; assert(file_top != NULL && file_bot != NULL); /* Partition the filestruct so that it contains no text, and keep * track of whether the top of the edit window is inside the * partition. */ filepart = partition_filestruct(openfile->current, openfile->current_x, openfile->current, openfile->current_x); edittop_inside = (openfile->edittop == openfile->fileage); /* Put the top and bottom of the filestruct at copies of file_top * and file_bot. */ openfile->fileage = copy_filestruct(file_top); openfile->filebot = openfile->fileage; while (openfile->filebot->next != NULL) openfile->filebot = openfile->filebot->next; /* Restore the current line and cursor position. */ openfile->current = openfile->filebot; openfile->current_x = strlen(openfile->filebot->data); if (openfile->fileage == openfile->filebot) openfile->current_x += strlen(filepart->top_data); /* Get the number of characters in the copied text, and add it to * totsize. */ openfile->totsize += get_totsize(openfile->fileage, openfile->filebot); /* Update the current y-coordinate to account for the number of * lines the copied text has, less one since the first line will be * tacked onto the current line. */ openfile->current_y += openfile->filebot->lineno - 1; top_save = openfile->fileage; /* If the top of the edit window is inside the partition, set it to * where the copied text now starts. */ if (edittop_inside) openfile->edittop = openfile->fileage; /* Unpartition the filestruct so that it contains all the text * again, plus the copied text. */ unpartition_filestruct(&filepart); /* Renumber starting with the beginning line of the old * partition. */ renumber(top_save); /* If the NO_NEWLINES flag isn't set, and the text doesn't end with * a magicline, add a new magicline. */ if (!ISSET(NO_NEWLINES) && openfile->filebot->data[0] != '\0') new_magicline(); } /* Create a new openfilestruct node. */ openfilestruct *make_new_opennode(void) { openfilestruct *newnode = (openfilestruct *)nmalloc(sizeof(openfilestruct)); newnode->filename = NULL; newnode->fileage = NULL; newnode->filebot = NULL; newnode->edittop = NULL; newnode->current = NULL; return newnode; } /* Splice a node into an existing openfilestruct. */ void splice_opennode(openfilestruct *begin, openfilestruct *newnode, openfilestruct *end) { assert(newnode != NULL && begin != NULL); newnode->next = end; newnode->prev = begin; begin->next = newnode; if (end != NULL) end->prev = newnode; } /* Unlink a node from the rest of the openfilestruct, and delete it. */ void unlink_opennode(openfilestruct *fileptr) { assert(fileptr != NULL && fileptr->prev != NULL && fileptr->next != NULL && fileptr != fileptr->prev && fileptr != fileptr->next); fileptr->prev->next = fileptr->next; fileptr->next->prev = fileptr->prev; delete_opennode(fileptr); } /* Delete a node from the openfilestruct. */ void delete_opennode(openfilestruct *fileptr) { assert(fileptr != NULL && fileptr->filename != NULL && fileptr->fileage != NULL); free(fileptr->filename); free_filestruct(fileptr->fileage); #ifndef NANO_TINY if (fileptr->current_stat != NULL) free(fileptr->current_stat); #endif free(fileptr); } #ifdef DEBUG /* Deallocate all memory associated with this and later files, including * the lines of text. */ void free_openfilestruct(openfilestruct *src) { assert(src != NULL); while (src != src->next) { src = src->next; delete_opennode(src->prev); } delete_opennode(src); } #endif /* Display a warning about a key disabled in view mode. */ void print_view_warning(void) { statusbar(_("Key illegal in VIEW mode")); } /* What we do when we're all set to exit. */ void finish(void) { if (!ISSET(NO_HELP)) blank_bottombars(); else blank_statusbar(); wrefresh(bottomwin); endwin(); /* Restore the old terminal settings. */ tcsetattr(0, TCSANOW, &oldterm); #if !defined(NANO_TINY) && defined(ENABLE_NANORC) if (!no_rcfiles && ISSET(HISTORYLOG)) save_history(); #endif #ifdef DEBUG thanks_for_all_the_fish(); #endif exit(0); } /* Die (gracefully?). */ void die(const char *msg, ...) { va_list ap; endwin(); /* Restore the old terminal settings. */ tcsetattr(0, TCSANOW, &oldterm); va_start(ap, msg); vfprintf(stderr, msg, ap); va_end(ap); /* Save the current file buffer if it's been modified. */ if (openfile->modified) { /* If we've partitioned the filestruct, unpartition it now. */ if (filepart != NULL) unpartition_filestruct(&filepart); die_save_file(openfile->filename); } #ifdef ENABLE_MULTIBUFFER /* Save all of the other modified file buffers, if any. */ if (openfile != NULL) { openfilestruct *tmp = openfile; while (tmp != openfile->next) { openfile = openfile->next; /* Save the current file buffer if it's been modified. */ if (openfile->modified) die_save_file(openfile->filename); } } #endif /* Get out. */ exit(1); } /* Save the current file under the name spacified in die_filename, which * is modified to be unique if necessary. */ void die_save_file(const char *die_filename) { char *retval; bool failed = TRUE; /* If we're using restricted mode, don't write any emergency backup * files, since that would allow reading from or writing to files * not specified on the command line. */ if (ISSET(RESTRICTED)) return; /* If we can't save, we have REAL bad problems, but we might as well * TRY. */ if (die_filename[0] == '\0') die_filename = "nano"; retval = get_next_filename(die_filename, ".save"); if (retval[0] != '\0') failed = (write_file(retval, NULL, TRUE, OVERWRITE, TRUE) == -1); if (!failed) fprintf(stderr, _("\nBuffer written to %s\n"), retval); else if (retval[0] != '\0') fprintf(stderr, _("\nBuffer not written to %s: %s\n"), retval, strerror(errno)); else fprintf(stderr, _("\nBuffer not written: %s\n"), _("Too many backup files?")); free(retval); } /* Initialize the three window portions nano uses. */ void window_init(void) { /* If the screen height is too small, get out. */ editwinrows = LINES - 5 + no_more_space() + no_help(); if (COLS < MIN_EDITOR_COLS || editwinrows < MIN_EDITOR_ROWS) die(_("Window size is too small for nano...\n")); #ifndef DISABLE_WRAPJUSTIFY /* Set up fill, based on the screen width. */ fill = wrap_at; if (fill <= 0) fill += COLS; if (fill < 0) fill = 0; #endif if (topwin != NULL) delwin(topwin); if (edit != NULL) delwin(edit); if (bottomwin != NULL) delwin(bottomwin); /* Set up the windows. */ topwin = newwin(2 - no_more_space(), COLS, 0, 0); edit = newwin(editwinrows, COLS, 2 - no_more_space(), 0); bottomwin = newwin(3 - no_help(), COLS, editwinrows + (2 - no_more_space()), 0); /* Turn the keypad on for the windows, if necessary. */ if (!ISSET(REBIND_KEYPAD)) { keypad(topwin, TRUE); keypad(edit, TRUE); keypad(bottomwin, TRUE); } } #ifndef DISABLE_MOUSE /* Initialize mouse support. */ void mouse_init(void) { if (ISSET(USE_MOUSE)) { mousemask(BUTTON1_RELEASED, NULL); mouseinterval(50); } else mousemask(0, NULL); } #endif #ifdef HAVE_GETOPT_LONG #define print_opt(shortflag, longflag, desc) print_opt_full(shortflag, longflag, desc) #else #define print_opt(shortflag, longflag, desc) print_opt_full(shortflag, desc) #endif /* Print one usage string to the screen. This cuts down on duplicate * strings to translate, and leaves out the parts that shouldn't be * translatable (the flag names). */ void print_opt_full(const char *shortflag #ifdef HAVE_GETOPT_LONG , const char *longflag #endif , const char *desc) { printf(" %s\t", shortflag); if (strlen(shortflag) < 8) printf("\t"); #ifdef HAVE_GETOPT_LONG printf("%s\t", longflag); if (strlen(longflag) < 8) printf("\t\t"); else if (strlen(longflag) < 16) printf("\t"); #endif if (desc != NULL) printf("%s", _(desc)); printf("\n"); } /* Explain how to properly use nano and its command line options. */ void usage(void) { printf(_("Usage: nano [OPTIONS] [[+LINE[,COLUMN]] FILE]...\n\n")); printf( #ifdef HAVE_GETOPT_LONG _("Option\t\tGNU long option\t\tMeaning\n") #else _("Option\t\tMeaning\n") #endif ); print_opt("-h, -?", "--help", N_("Show this message")); print_opt(_("+LINE[,COLUMN]"), "", N_("Start at line LINE, column COLUMN")); #ifndef NANO_TINY print_opt("-A", "--smarthome", N_("Enable smart home key")); print_opt("-B", "--backup", N_("Save backups of existing files")); print_opt(_("-C "), _("--backupdir="), N_("Directory for saving unique backup files")); #endif print_opt("-D", "--boldtext", N_("Use bold instead of reverse video text")); #ifndef NANO_TINY print_opt("-E", "--tabstospaces", N_("Convert typed tabs to spaces")); #endif #ifdef ENABLE_MULTIBUFFER print_opt("-F", "--multibuffer", N_("Enable multiple file buffers")); #endif #ifdef ENABLE_NANORC #ifndef NANO_TINY print_opt("-H", "--historylog", N_("Log & read search/replace string history")); #endif print_opt("-I", "--ignorercfiles", N_("Don't look at nanorc files")); #endif print_opt("-K", "--rebindkeypad", N_("Fix numeric keypad key confusion problem")); print_opt("-L", "--nonewlines", N_("Don't add newlines to the ends of files")); #ifndef NANO_TINY print_opt("-N", "--noconvert", N_("Don't convert files from DOS/Mac format")); #endif print_opt("-O", "--morespace", N_("Use more space for editing")); #ifndef DISABLE_JUSTIFY print_opt(_("-Q "), _("--quotestr="), N_("Quoting string")); #endif print_opt("-R", "--restricted", N_("Restricted mode")); #ifndef NANO_TINY print_opt("-S", "--smooth", N_("Smooth scrolling")); #endif print_opt(_("-T <#cols>"), _("--tabsize=<#cols>"), N_("Set width of a tab in cols to #cols")); #ifndef NANO_TINY print_opt("-U", "--quickblank", N_("Do quick statusbar blanking")); #endif print_opt("-V", "--version", N_("Print version information and exit")); #ifndef NANO_TINY print_opt("-W", "--wordbounds", N_("Detect word boundaries more accurately")); #endif #ifdef ENABLE_COLOR print_opt(_("-Y "), _("--syntax="), N_("Syntax definition to use")); #endif print_opt("-c", "--const", N_("Constantly show cursor position")); print_opt("-d", "--rebinddelete", N_("Fix Backspace/Delete confusion problem")); #ifndef NANO_TINY print_opt("-i", "--autoindent", N_("Automatically indent new lines")); print_opt("-k", "--cut", N_("Cut from cursor to end of line")); #endif print_opt("-l", "--nofollow", N_("Don't follow symbolic links, overwrite")); #ifndef DISABLE_MOUSE print_opt("-m", "--mouse", N_("Enable the use of the mouse")); #endif #ifndef DISABLE_OPERATINGDIR print_opt(_("-o "), _("--operatingdir="), N_("Set operating directory")); #endif print_opt("-p", "--preserve", N_("Preserve XON (^Q) and XOFF (^S) keys")); #ifndef DISABLE_WRAPJUSTIFY print_opt(_("-r <#cols>"), _("--fill=<#cols>"), N_("Set fill cols to (wrap lines at) #cols")); #endif #ifndef DISABLE_SPELLER print_opt(_("-s "), _("--speller="), N_("Enable alternate speller")); #endif print_opt("-t", "--tempfile", N_("Auto save on exit, don't prompt")); print_opt("-v", "--view", N_("View (read only) mode")); #ifndef DISABLE_WRAPPING print_opt("-w", "--nowrap", N_("Don't wrap long lines")); #endif print_opt("-x", "--nohelp", N_("Don't show the two help lines")); print_opt("-z", "--suspend", N_("Enable suspension")); /* This is a special case. */ print_opt("-a, -b, -e,", "", NULL); print_opt("-f, -g, -j", "", N_("(ignored, for Pico compatibility)")); exit(0); } /* Display the current version of nano, the date and time it was * compiled, contact information for it, and the configuration options * it was compiled with. */ void version(void) { printf(_(" GNU nano version %s (compiled %s, %s)\n"), VERSION, __TIME__, __DATE__); printf( _(" Email: nano@nano-editor.org Web: http://www.nano-editor.org/")); printf(_("\n Compiled options:")); #ifdef DISABLE_BROWSER printf(" --disable-browser"); #endif #ifdef DISABLE_HELP printf(" --disable-help"); #endif #ifdef DISABLE_JUSTIFY printf(" --disable-justify"); #endif #ifdef DISABLE_MOUSE printf(" --disable-mouse"); #endif #ifndef ENABLE_NLS printf(" --disable-nls"); #endif #ifdef DISABLE_OPERATINGDIR printf(" --disable-operatingdir"); #endif #ifdef DISABLE_SPELLER printf(" --disable-speller"); #endif #ifdef DISABLE_TABCOMP printf(" --disable-tabcomp"); #endif #ifdef DISABLE_WRAPPING printf(" --disable-wrapping"); #endif #if defined(DISABLE_ROOTWRAP) && !defined(DISABLE_WRAPPING) printf(" --disable-wrapping-as-root"); #endif #ifdef ENABLE_COLOR printf(" --enable-color"); #endif #ifdef DEBUG printf(" --enable-debug"); #endif #ifdef NANO_EXTRA printf(" --enable-extra"); #endif #ifdef ENABLE_MULTIBUFFER printf(" --enable-multibuffer"); #endif #ifdef ENABLE_NANORC printf(" --enable-nanorc"); #endif #ifdef NANO_TINY printf(" --enable-tiny"); #endif #ifdef ENABLE_UTF8 printf(" --enable-utf8"); #endif #ifdef USE_SLANG printf(" --with-slang"); #endif printf("\n"); } /* Return 1 if the MORE_SPACE flag is set, and 0 otherwise. This is * used to calculate the relative screen position while taking this flag * into account, since it adds one line to the edit window. */ int no_more_space(void) { return ISSET(MORE_SPACE) ? 1 : 0; } /* Return 2 if the NO_HELP flag is set, and 0 otherwise. This is used * to calculate the relative screen position while taking this flag into * account, since it removes two lines from the edit window. */ int no_help(void) { return ISSET(NO_HELP) ? 2 : 0; } /* Indicate a disabled function on the statusbar. */ void nano_disabled_msg(void) { statusbar(_("Sorry, support for this function has been disabled")); } void do_exit(void) { int i; /* If the file hasn't been modified, pretend the user chose not to * save. */ if (!openfile->modified) i = 0; /* If the TEMP_FILE flag is set, pretend the user chose to save. */ else if (ISSET(TEMP_FILE)) i = 1; /* Otherwise, ask the user whether or not to save. */ else i = do_yesno_prompt(FALSE, _("Save modified buffer (ANSWERING \"No\" WILL DESTROY CHANGES) ? ")); #ifdef DEBUG dump_filestruct(openfile->fileage); #endif /* If the user chose not to save, or if the user chose to save and * the save succeeded, we're ready to exit. */ if (i == 0 || (i == 1 && do_writeout(TRUE) == 0)) { #ifdef ENABLE_MULTIBUFFER /* Exit only if there are no more open file buffers. */ if (!close_buffer()) #endif finish(); /* If the user canceled, we go on. */ } else if (i != 1) statusbar(_("Cancelled")); display_main_list(); } /* Initialize the signal handlers. */ void signal_init(void) { /* Trap SIGINT and SIGQUIT because we want them to do useful * things. */ memset(&act, 0, sizeof(struct sigaction)); act.sa_handler = SIG_IGN; sigaction(SIGINT, &act, NULL); sigaction(SIGQUIT, &act, NULL); /* Trap SIGHUP and SIGTERM because we want to write the file out. */ act.sa_handler = handle_hupterm; sigaction(SIGHUP, &act, NULL); sigaction(SIGTERM, &act, NULL); #ifndef NANO_TINY /* Trap SIGWINCH because we want to handle window resizes. */ act.sa_handler = handle_sigwinch; sigaction(SIGWINCH, &act, NULL); allow_pending_sigwinch(FALSE); #endif /* Trap normal suspend (^Z) so we can handle it ourselves. */ if (!ISSET(SUSPEND)) { act.sa_handler = SIG_IGN; sigaction(SIGTSTP, &act, NULL); } else { /* Block all other signals in the suspend and continue handlers. * If we don't do this, other stuff interrupts them! */ sigfillset(&act.sa_mask); act.sa_handler = do_suspend; sigaction(SIGTSTP, &act, NULL); act.sa_handler = do_continue; sigaction(SIGCONT, &act, NULL); } } /* Handler for SIGHUP (hangup) and SIGTERM (terminate). */ RETSIGTYPE handle_hupterm(int signal) { die(_("Received SIGHUP or SIGTERM\n")); } /* Handler for SIGTSTP (suspend). */ RETSIGTYPE do_suspend(int signal) { /* Temporarily leave curses mode. */ endwin(); printf(_("\n\n\n\n\n\nUse \"fg\" to return to nano.\n")); fflush(stdout); /* Restore the old terminal settings. */ tcsetattr(0, TCSANOW, &oldterm); /* Trap SIGHUP and SIGTERM so we can properly deal with them while * suspended. */ act.sa_handler = handle_hupterm; sigaction(SIGHUP, &act, NULL); sigaction(SIGTERM, &act, NULL); /* Do what mutt does: send ourselves a SIGSTOP. */ kill(0, SIGSTOP); } /* Handler for SIGCONT (continue after suspend). */ RETSIGTYPE do_continue(int signal) { #ifndef NANO_TINY /* Perhaps the user resized the window while we slept. Handle it, * and update the screen in the process. */ handle_sigwinch(0); #else /* Reenter curses mode, and update the screen in the process. */ doupdate(); #endif } #ifndef NANO_TINY /* Handler for SIGWINCH (window size change). */ RETSIGTYPE handle_sigwinch(int signal) { const char *tty = ttyname(0); int fd, result = 0; struct winsize win; if (tty == NULL) return; fd = open(tty, O_RDWR); if (fd == -1) return; result = ioctl(fd, TIOCGWINSZ, &win); close(fd); if (result == -1) return; /* We could check whether the COLS or LINES changed, and return * otherwise. However, COLS and LINES are curses global variables, * and in some cases curses has already updated them. But not in * all cases. Argh. */ COLS = win.ws_col; LINES = win.ws_row; /* If we've partitioned the filestruct, unpartition it now. */ if (filepart != NULL) unpartition_filestruct(&filepart); #ifdef USE_SLANG /* Slang curses emulation brain damage, part 1: If we just do what * curses does here, it'll only work properly if the resize made the * window smaller. Do what mutt does: Leave and immediately reenter * Slang screen management mode. */ SLsmg_reset_smg(); SLsmg_init_smg(); #else /* Do the equivalent of what Minimum Profit does: Leave and * immediately reenter curses mode. */ endwin(); doupdate(); #endif /* Restore the terminal to its previous state. */ terminal_init(); /* Turn the cursor back on for sure. */ curs_set(1); /* Do the equivalent of what both mutt and Minimum Profit do: * Reinitialize all the windows based on the new screen * dimensions. */ window_init(); /* Redraw the contents of the windows that need it. */ blank_statusbar(); currshortcut = main_list; total_refresh(); /* Jump back to either main() or the unjustify routine in * do_justify(). */ siglongjmp(jump_buf, 1); } /* If allow is TRUE, block any SIGWINCH signals that we get, so that we * can deal with them later. If allow is FALSE, unblock any SIGWINCH * signals that we have, so that we can deal with them now. */ void allow_pending_sigwinch(bool allow) { sigset_t winch; sigemptyset(&winch); sigaddset(&winch, SIGWINCH); sigprocmask(allow ? SIG_UNBLOCK : SIG_BLOCK, &winch, NULL); } #endif /* !NANO_TINY */ #ifndef NANO_TINY /* Handle the global toggle specified in which. */ void do_toggle(const toggle *which) { bool enabled; TOGGLE(which->flag); switch (which->val) { #ifndef DISABLE_MOUSE case TOGGLE_MOUSE_KEY: mouse_init(); break; #endif case TOGGLE_MORESPACE_KEY: case TOGGLE_NOHELP_KEY: window_init(); total_refresh(); break; case TOGGLE_SUSPEND_KEY: signal_init(); break; #ifdef ENABLE_NANORC case TOGGLE_WHITESPACE_KEY: titlebar(NULL); edit_refresh(); break; #endif #ifdef ENABLE_COLOR case TOGGLE_SYNTAX_KEY: edit_refresh(); break; #endif } enabled = ISSET(which->flag); if (which->val == TOGGLE_NOHELP_KEY #ifndef DISABLE_WRAPPING || which->val == TOGGLE_WRAP_KEY #endif #ifdef ENABLE_COLOR || which->val == TOGGLE_SYNTAX_KEY #endif ) enabled = !enabled; statusbar("%s %s", which->desc, enabled ? _("enabled") : _("disabled")); } #endif /* !NANO_TINY */ /* Disable extended input and output processing in our terminal * settings. */ void disable_extended_io(void) { struct termios term; tcgetattr(0, &term); term.c_lflag &= ~IEXTEN; term.c_oflag &= ~OPOST; tcsetattr(0, TCSANOW, &term); } /* Disable interpretation of the special control keys in our terminal * settings. */ void disable_signals(void) { struct termios term; tcgetattr(0, &term); term.c_lflag &= ~ISIG; tcsetattr(0, TCSANOW, &term); } #ifndef NANO_TINY /* Enable interpretation of the special control keys in our terminal * settings. */ void enable_signals(void) { struct termios term; tcgetattr(0, &term); term.c_lflag |= ISIG; tcsetattr(0, TCSANOW, &term); } #endif /* Disable interpretation of the flow control characters in our terminal * settings. */ void disable_flow_control(void) { struct termios term; tcgetattr(0, &term); term.c_iflag &= ~IXON; tcsetattr(0, TCSANOW, &term); } /* Enable interpretation of the flow control characters in our terminal * settings. */ void enable_flow_control(void) { struct termios term; tcgetattr(0, &term); term.c_iflag |= IXON; tcsetattr(0, TCSANOW, &term); } /* Set up the terminal state. Put the terminal in cbreak mode (read one * character at a time and interpret the special control keys), disable * translation of carriage return (^M) into newline (^J) so that we can * tell the difference between the Enter key and Ctrl-J, and disable * echoing of characters as they're typed. Finally, disable extended * input and output processing, disable interpretation of the special * control keys, and if we're not in preserve mode, disable * interpretation of the flow control characters too. */ void terminal_init(void) { cbreak(); nonl(); noecho(); disable_extended_io(); disable_signals(); if (!ISSET(PRESERVE)) disable_flow_control(); } /* Read in a character, interpret it as a shortcut or toggle if * necessary, and return it. Set meta_key to TRUE if the character is a * meta sequence, set func_key to TRUE if the character is a function * key, set s_or_t to TRUE if the character is a shortcut or toggle * key, set ran_func to TRUE if we ran a function associated with a * shortcut key, and set finished to TRUE if we're done after running * or trying to run a function associated with a shortcut key. If * allow_funcs is FALSE, don't actually run any functions associated * with shortcut keys. */ int do_input(bool *meta_key, bool *func_key, bool *s_or_t, bool *ran_func, bool *finished, bool allow_funcs) { int input; /* The character we read in. */ static int *kbinput = NULL; /* The input buffer. */ static size_t kbinput_len = 0; /* The length of the input buffer. */ bool cut_copy = FALSE; /* Are we cutting or copying text? */ const shortcut *s; bool have_shortcut; #ifndef NANO_TINY const toggle *t; bool have_toggle; #endif *s_or_t = FALSE; *ran_func = FALSE; *finished = FALSE; /* Read in a character. */ input = get_kbinput(edit, meta_key, func_key); #ifndef DISABLE_MOUSE if (allow_funcs) { /* If we got a mouse click and it was on a shortcut, read in the * shortcut character. */ if (*func_key == TRUE && input == KEY_MOUSE) { if (do_mouse()) input = get_kbinput(edit, meta_key, func_key); else { *meta_key = FALSE; *func_key = FALSE; input = ERR; } } } #endif /* Check for a shortcut in the main list. */ s = get_shortcut(main_list, &input, meta_key, func_key); /* If we got a shortcut from the main list, or a "universal" * edit window shortcut, set have_shortcut to TRUE. */ have_shortcut = (s != NULL || input == NANO_XON_KEY || input == NANO_XOFF_KEY || input == NANO_SUSPEND_KEY); #ifndef NANO_TINY /* Check for a toggle in the main list. */ t = get_toggle(input, *meta_key); /* If we got a toggle from the main list, set have_toggle to * TRUE. */ have_toggle = (t != NULL); #endif /* Set s_or_t to TRUE if we got a shortcut or toggle. */ *s_or_t = (have_shortcut #ifndef NANO_TINY || have_toggle #endif ); /* If we got a non-high-bit control key, a meta key sequence, or a * function key, and it's not a shortcut or toggle, throw it out. */ if (*s_or_t == FALSE) { if (is_ascii_cntrl_char(input) || *meta_key == TRUE || *func_key == TRUE) { statusbar(_("Unknown Command")); beep(); *meta_key = FALSE; *func_key = FALSE; input = ERR; } } if (allow_funcs) { /* If we got a character, and it isn't a shortcut or toggle, * it's a normal text character. Display the warning if we're * in view mode, or add the character to the input buffer if * we're not. */ if (input != ERR && *s_or_t == FALSE) { if (ISSET(VIEW_MODE)) print_view_warning(); else { kbinput_len++; kbinput = (int *)nrealloc(kbinput, kbinput_len * sizeof(int)); kbinput[kbinput_len - 1] = input; } } /* If we got a shortcut or toggle, or if there aren't any other * characters waiting after the one we read in, we need to * output all the characters in the input buffer if it isn't * empty. Note that it should be empty if we're in view * mode. */ if (*s_or_t == TRUE || get_key_buffer_len() == 0) { #ifndef DISABLE_WRAPPING /* If we got a shortcut or toggle, and it's not the shortcut * for verbatim input, turn off prepending of wrapped * text. */ if (*s_or_t == TRUE && (!have_shortcut || s == NULL || s->func != do_verbatim_input)) wrap_reset(); #endif if (kbinput != NULL) { /* Display all the characters in the input buffer at * once, filtering out control characters. */ char *output = charalloc(kbinput_len + 1); size_t i; for (i = 0; i < kbinput_len; i++) output[i] = (char)kbinput[i]; output[i] = '\0'; do_output(output, kbinput_len, FALSE); free(output); /* Empty the input buffer. */ kbinput_len = 0; free(kbinput); kbinput = NULL; } } if (have_shortcut) { switch (input) { /* Handle the "universal" edit window shortcuts. */ case NANO_XON_KEY: statusbar(_("XON ignored, mumble mumble")); break; case NANO_XOFF_KEY: statusbar(_("XOFF ignored, mumble mumble")); break; #ifndef NANO_TINY case NANO_SUSPEND_KEY: if (ISSET(SUSPEND)) do_suspend(0); break; #endif /* Handle the normal edit window shortcuts, setting * ran_func to TRUE if we try to run their associated * functions and setting finished to TRUE to indicate * that we're done after running or trying to run their * associated functions. */ default: /* If the function associated with this shortcut is * cutting or copying text, indicate this. */ if (s->func == do_cut_text_void #ifndef NANO_TINY || s->func == do_copy_text || s->func == do_cut_till_end #endif ) cut_copy = TRUE; if (s->func != NULL) { *ran_func = TRUE; if (ISSET(VIEW_MODE) && !s->viewok) print_view_warning(); else s->func(); } *finished = TRUE; break; } } #ifndef NANO_TINY else if (have_toggle) { /* Toggle the flag associated with this shortcut. */ if (allow_funcs) do_toggle(t); } #endif } /* If we aren't cutting or copying text, blow away the text in the * cutbuffer. */ if (!cut_copy) cutbuffer_reset(); return input; } #ifndef DISABLE_MOUSE /* Handle a mouse click on the edit window or the shortcut list. */ bool do_mouse(void) { int mouse_x, mouse_y; bool retval = get_mouseinput(&mouse_x, &mouse_y, TRUE); if (!retval) { /* We can click in the edit window to move the cursor. */ if (wenclose(edit, mouse_y, mouse_x)) { bool sameline; /* Did they click on the line with the cursor? If they * clicked on the cursor, we set the mark. */ const filestruct *current_save = openfile->current; size_t current_x_save = openfile->current_x; size_t pww_save = openfile->placewewant; /* Subtract out the size of topwin. */ mouse_y -= 2 - no_more_space(); sameline = (mouse_y == openfile->current_y); /* Move to where the click occurred. */ for (; openfile->current_y < mouse_y && openfile->current != openfile->filebot; openfile->current_y++) openfile->current = openfile->current->next; for (; openfile->current_y > mouse_y && openfile->current != openfile->fileage; openfile->current_y--) openfile->current = openfile->current->prev; openfile->current_x = actual_x(openfile->current->data, get_page_start(xplustabs()) + mouse_x); openfile->placewewant = xplustabs(); #ifndef NANO_TINY /* Clicking where the cursor is toggles the mark, as does * clicking beyond the line length with the cursor at the * end of the line. */ if (sameline && openfile->current_x == current_x_save) do_mark(); #endif edit_redraw(current_save, pww_save); } } return retval; } #endif /* !DISABLE_MOUSE */ /* The user typed output_len multibyte characters. Add them to the edit * buffer, filtering out all ASCII control characters if allow_cntrls is * TRUE. */ void do_output(char *output, size_t output_len, bool allow_cntrls) { size_t current_len, i = 0; bool do_refresh = FALSE; /* Do we have to call edit_refresh(), or can we get away with * just update_line()? */ char *char_buf = charalloc(mb_cur_max()); int char_buf_len; assert(openfile->current != NULL && openfile->current->data != NULL); current_len = strlen(openfile->current->data); while (i < output_len) { /* If allow_cntrls is FALSE, filter out nulls and newlines, * since they're ASCII control characters. */ if (allow_cntrls) { /* Null to newline, if needed. */ if (output[i] == '\0') output[i] = '\n'; /* Newline to Enter, if needed. */ else if (output[i] == '\n') { do_enter(); i++; continue; } } /* Interpret the next multibyte character. */ char_buf_len = parse_mbchar(output + i, char_buf, NULL); i += char_buf_len; /* If allow_cntrls is FALSE, filter out an ASCII control * character. */ if (!allow_cntrls && is_ascii_cntrl_char(*(output + i - char_buf_len))) continue; /* If the NO_NEWLINES flag isn't set, when a character is * added to the magicline, it means we need a new magicline! */ if (!ISSET(NO_NEWLINES) && openfile->filebot == openfile->current) new_magicline(); /* More dangerousness fun =) */ openfile->current->data = charealloc(openfile->current->data, current_len + (char_buf_len * 2)); assert(openfile->current_x <= current_len); charmove(openfile->current->data + openfile->current_x + char_buf_len, openfile->current->data + openfile->current_x, current_len - openfile->current_x + char_buf_len); strncpy(openfile->current->data + openfile->current_x, char_buf, char_buf_len); current_len += char_buf_len; openfile->totsize++; set_modified(); #ifndef NANO_TINY /* Note that current_x has not yet been incremented. */ if (openfile->mark_set && openfile->current == openfile->mark_begin && openfile->current_x < openfile->mark_begin_x) openfile->mark_begin_x += char_buf_len; #endif openfile->current_x += char_buf_len; #ifndef DISABLE_WRAPPING /* If we're wrapping text, we need to call edit_refresh(). */ if (!ISSET(NO_WRAP)) { bool do_refresh_save = do_refresh; do_refresh = do_wrap(openfile->current); /* If we needed to call edit_refresh() before this, we'll * still need to after this. */ if (do_refresh_save) do_refresh = TRUE; } #endif #ifdef ENABLE_COLOR /* If color syntaxes are available and turned on, we need to * call edit_refresh(). */ if (openfile->colorstrings != NULL && !ISSET(NO_COLOR_SYNTAX)) do_refresh = TRUE; #endif } free(char_buf); openfile->placewewant = xplustabs(); if (do_refresh) edit_refresh(); else update_line(openfile->current, openfile->current_x); } int main(int argc, char **argv) { int optchr; ssize_t startline = 1; /* Line to try and start at. */ ssize_t startcol = 1; /* Column to try and start at. */ #ifndef DISABLE_WRAPJUSTIFY bool fill_used = FALSE; /* Was the fill option used? */ #endif #ifdef ENABLE_MULTIBUFFER bool old_multibuffer; /* The old value of the multibuffer option, restored after we * load all files on the command line. */ #endif #ifdef HAVE_GETOPT_LONG const struct option long_options[] = { {"help", 0, NULL, 'h'}, {"boldtext", 0, NULL, 'D'}, #ifdef ENABLE_MULTIBUFFER {"multibuffer", 0, NULL, 'F'}, #endif #ifdef ENABLE_NANORC {"ignorercfiles", 0, NULL, 'I'}, #endif {"rebindkeypad", 0, NULL, 'K'}, {"nonewlines", 0, NULL, 'L'}, {"morespace", 0, NULL, 'O'}, #ifndef DISABLE_JUSTIFY {"quotestr", 1, NULL, 'Q'}, #endif {"restricted", 0, NULL, 'R'}, {"tabsize", 1, NULL, 'T'}, {"version", 0, NULL, 'V'}, #ifdef ENABLE_COLOR {"syntax", 1, NULL, 'Y'}, #endif {"const", 0, NULL, 'c'}, {"rebinddelete", 0, NULL, 'd'}, {"nofollow", 0, NULL, 'l'}, #ifndef DISABLE_MOUSE {"mouse", 0, NULL, 'm'}, #endif #ifndef DISABLE_OPERATINGDIR {"operatingdir", 1, NULL, 'o'}, #endif {"preserve", 0, NULL, 'p'}, #ifndef DISABLE_WRAPJUSTIFY {"fill", 1, NULL, 'r'}, #endif #ifndef DISABLE_SPELLER {"speller", 1, NULL, 's'}, #endif {"tempfile", 0, NULL, 't'}, {"view", 0, NULL, 'v'}, #ifndef DISABLE_WRAPPING {"nowrap", 0, NULL, 'w'}, #endif {"nohelp", 0, NULL, 'x'}, {"suspend", 0, NULL, 'z'}, #ifndef NANO_TINY {"smarthome", 0, NULL, 'A'}, {"backup", 0, NULL, 'B'}, {"backupdir", 1, NULL, 'C'}, {"tabstospaces", 0, NULL, 'E'}, {"historylog", 0, NULL, 'H'}, {"noconvert", 0, NULL, 'N'}, {"smooth", 0, NULL, 'S'}, {"quickblank", 0, NULL, 'U'}, {"wordbounds", 0, NULL, 'W'}, {"autoindent", 0, NULL, 'i'}, {"cut", 0, NULL, 'k'}, #endif {NULL, 0, NULL, 0} }; #endif #ifdef ENABLE_UTF8 { /* If the locale set exists and includes the case-insensitive * string "UTF8" or "UTF-8", we should use UTF-8. */ char *locale = setlocale(LC_ALL, ""); if (locale != NULL && (strcasestr(locale, "UTF8") != NULL || strcasestr(locale, "UTF-8") != NULL)) { #ifdef USE_SLANG SLutf8_enable(TRUE); #endif utf8_init(); } } #else setlocale(LC_ALL, ""); #endif #ifdef ENABLE_NLS bindtextdomain(PACKAGE, LOCALEDIR); textdomain(PACKAGE); #endif #if !defined(ENABLE_NANORC) && defined(DISABLE_ROOTWRAP) && !defined(DISABLE_WRAPPING) /* If we don't have rcfile support, we're root, and * --disable-wrapping-as-root is used, turn wrapping off. */ if (geteuid() == NANO_ROOT_UID) SET(NO_WRAP); #endif while ((optchr = #ifdef HAVE_GETOPT_LONG getopt_long(argc, argv, "h?ABC:DEFHIKLNOQ:RST:UVWY:abcdefgijklmo:pr:s:tvwxz", long_options, NULL) #else getopt(argc, argv, "h?ABC:DEFHIKLNOQ:RST:UVWY:abcdefgijklmo:pr:s:tvwxz") #endif ) != -1) { switch (optchr) { case 'a': case 'b': case 'e': case 'f': case 'g': case 'j': /* Pico compatibility flags. */ break; #ifndef NANO_TINY case 'A': SET(SMART_HOME); break; case 'B': SET(BACKUP_FILE); break; case 'C': backup_dir = mallocstrcpy(backup_dir, optarg); break; #endif case 'D': SET(BOLD_TEXT); break; #ifndef NANO_TINY case 'E': SET(TABS_TO_SPACES); break; #endif #ifdef ENABLE_MULTIBUFFER case 'F': SET(MULTIBUFFER); break; #endif #ifdef ENABLE_NANORC #ifndef NANO_TINY case 'H': SET(HISTORYLOG); break; #endif case 'I': no_rcfiles = TRUE; break; #endif case 'K': SET(REBIND_KEYPAD); break; case 'L': SET(NO_NEWLINES); break; #ifndef NANO_TINY case 'N': SET(NO_CONVERT); break; #endif case 'O': SET(MORE_SPACE); break; #ifndef DISABLE_JUSTIFY case 'Q': quotestr = mallocstrcpy(quotestr, optarg); break; #endif case 'R': SET(RESTRICTED); break; #ifndef NANO_TINY case 'S': SET(SMOOTH_SCROLL); break; #endif case 'T': if (!parse_num(optarg, &tabsize) || tabsize <= 0) { fprintf(stderr, _("Requested tab size %s invalid"), optarg); fprintf(stderr, "\n"); exit(1); } break; #ifndef NANO_TINY case 'U': SET(QUICK_BLANK); break; #endif case 'V': version(); exit(0); #ifndef NANO_TINY case 'W': SET(WORD_BOUNDS); break; #endif #ifdef ENABLE_COLOR case 'Y': syntaxstr = mallocstrcpy(syntaxstr, optarg); break; #endif case 'c': SET(CONST_UPDATE); break; case 'd': SET(REBIND_DELETE); break; #ifndef NANO_TINY case 'i': SET(AUTOINDENT); break; case 'k': SET(CUT_TO_END); break; #endif case 'l': SET(NOFOLLOW_SYMLINKS); break; #ifndef DISABLE_MOUSE case 'm': SET(USE_MOUSE); break; #endif #ifndef DISABLE_OPERATINGDIR case 'o': operating_dir = mallocstrcpy(operating_dir, optarg); break; #endif case 'p': SET(PRESERVE); break; #ifndef DISABLE_WRAPJUSTIFY case 'r': if (!parse_num(optarg, &wrap_at)) { fprintf(stderr, _("Requested fill size %s invalid"), optarg); fprintf(stderr, "\n"); exit(1); } fill_used = TRUE; break; #endif #ifndef DISABLE_SPELLER case 's': alt_speller = mallocstrcpy(alt_speller, optarg); break; #endif case 't': SET(TEMP_FILE); break; case 'v': SET(VIEW_MODE); break; #ifndef DISABLE_WRAPPING case 'w': SET(NO_WRAP); break; #endif case 'x': SET(NO_HELP); break; case 'z': SET(SUSPEND); break; default: usage(); } } /* If the executable filename starts with 'r', we use restricted * mode. */ if (*(tail(argv[0])) == 'r') SET(RESTRICTED); /* If we're using restricted mode, disable suspending, backups, and * reading rcfiles, since they all would allow reading from or * writing to files not specified on the command line. */ if (ISSET(RESTRICTED)) { UNSET(SUSPEND); UNSET(BACKUP_FILE); #ifdef ENABLE_NANORC no_rcfiles = TRUE; #endif } /* We've read through the command line options. Now back up the flags * and values that are set, and read the rcfile(s). If the values * haven't changed afterward, restore the backed-up values. */ #ifdef ENABLE_NANORC if (!no_rcfiles) { #ifndef DISABLE_OPERATINGDIR char *operating_dir_cpy = operating_dir; #endif #ifndef DISABLE_WRAPJUSTIFY ssize_t wrap_at_cpy = wrap_at; #endif #ifndef NANO_TINY char *backup_dir_cpy = backup_dir; #endif #ifndef DISABLE_JUSTIFY char *quotestr_cpy = quotestr; #endif #ifndef DISABLE_SPELLER char *alt_speller_cpy = alt_speller; #endif ssize_t tabsize_cpy = tabsize; long flags_cpy = flags; #ifndef DISABLE_OPERATINGDIR operating_dir = NULL; #endif #ifndef NANO_TINY backup_dir = NULL; #endif #ifndef DISABLE_JUSTIFY quotestr = NULL; #endif #ifndef DISABLE_SPELLER alt_speller = NULL; #endif do_rcfile(); #ifndef DISABLE_OPERATINGDIR if (operating_dir_cpy != NULL) { free(operating_dir); operating_dir = operating_dir_cpy; } #endif #ifndef DISABLE_WRAPJUSTIFY if (fill_used) wrap_at = wrap_at_cpy; #endif #ifndef NANO_TINY if (backup_dir_cpy != NULL) { free(backup_dir); backup_dir = backup_dir_cpy; } #endif #ifndef DISABLE_JUSTIFY if (quotestr_cpy != NULL) { free(quotestr); quotestr = quotestr_cpy; } #endif #ifndef DISABLE_SPELLER if (alt_speller_cpy != NULL) { free(alt_speller); alt_speller = alt_speller_cpy; } #endif if (tabsize_cpy != -1) tabsize = tabsize_cpy; flags |= flags_cpy; } #if defined(DISABLE_ROOTWRAP) && !defined(DISABLE_WRAPPING) else if (geteuid() == NANO_ROOT_UID) SET(NO_WRAP); #endif #endif /* ENABLE_NANORC */ /* If we're using bold text instead of reverse video text, set it up * now. */ if (ISSET(BOLD_TEXT)) reverse_attr = A_BOLD; #ifndef NANO_TINY /* Set up the search/replace history. */ history_init(); #ifdef ENABLE_NANORC if (!no_rcfiles && ISSET(HISTORYLOG)) load_history(); #endif #endif #ifndef NANO_TINY /* Set up the backup directory (unless we're using restricted mode, * in which case backups are disabled, since they would allow * reading from or writing to files not specified on the command * line). This entails making sure it exists and is a directory, so * that backup files will be saved there. */ if (!ISSET(RESTRICTED)) init_backup_dir(); #endif #ifndef DISABLE_OPERATINGDIR /* Set up the operating directory. This entails chdir()ing there, * so that file reads and writes will be based there. */ init_operating_dir(); #endif #ifndef DISABLE_JUSTIFY /* If punct wasn't specified, set its default value. */ if (punct == NULL) punct = mallocstrcpy(NULL, "!.?"); /* If brackets wasn't specified, set its default value. */ if (brackets == NULL) brackets = mallocstrcpy(NULL, "\"')>]}"); /* If quotestr wasn't specified, set its default value. */ if (quotestr == NULL) quotestr = mallocstrcpy(NULL, #ifdef HAVE_REGEX_H "^([ \t]*[#:>|}])+" #else "> " #endif ); #ifdef HAVE_REGEX_H quoterc = regcomp("ereg, quotestr, REG_EXTENDED); if (quoterc == 0) { /* We no longer need quotestr, just quotereg. */ free(quotestr); quotestr = NULL; } else { size_t size = regerror(quoterc, "ereg, NULL, 0); quoteerr = charalloc(size); regerror(quoterc, "ereg, quoteerr, size); } #else quotelen = strlen(quotestr); #endif /* !HAVE_REGEX_H */ #endif /* !DISABLE_JUSTIFY */ #ifndef DISABLE_SPELLER /* If we don't have an alternative spell checker after reading the * command line and/or rcfile(s), check $SPELL for one, as Pico * does (unless we're using restricted mode, in which case spell * checking is disabled, since it would allow reading from or * writing to files not specified on the command line). */ if (!ISSET(RESTRICTED) && alt_speller == NULL) { char *spellenv = getenv("SPELL"); if (spellenv != NULL) alt_speller = mallocstrcpy(NULL, spellenv); } #endif #ifndef NANO_TINY /* If matchbrackets wasn't specified, set its default value. */ if (matchbrackets == NULL) matchbrackets = mallocstrcpy(NULL, "(<[{)>]}"); #endif #if !defined(NANO_TINY) && defined(ENABLE_NANORC) /* If whitespace wasn't specified, set its default value. */ if (whitespace == NULL) { whitespace = mallocstrcpy(NULL, " "); whitespace_len[0] = 1; whitespace_len[1] = 1; } #endif /* If tabsize wasn't specified, set its default value. */ if (tabsize == -1) tabsize = WIDTH_OF_TAB; /* Back up the old terminal settings so that they can be restored. */ tcgetattr(0, &oldterm); /* Initialize curses mode. */ initscr(); /* Set up the terminal state. */ terminal_init(); /* Turn the cursor on for sure. */ curs_set(1); #ifdef DEBUG fprintf(stderr, "Main: set up windows\n"); #endif /* Initialize all the windows based on the current screen * dimensions. */ window_init(); /* Set up the signal handlers. */ signal_init(); /* Set up the shortcut lists. */ shortcut_init(FALSE); #ifndef DISABLE_MOUSE mouse_init(); #endif #ifdef DEBUG fprintf(stderr, "Main: open file\n"); #endif /* If there's a +LINE or +LINE,COLUMN flag here, it is the first * non-option argument, and it is followed by at least one other * argument, the filename it applies to. */ if (0 < optind && optind < argc - 1 && argv[optind][0] == '+') { parse_line_column(&argv[optind][1], &startline, &startcol); optind++; } #ifdef ENABLE_MULTIBUFFER old_multibuffer = ISSET(MULTIBUFFER); SET(MULTIBUFFER); /* Read all the files after the first one on the command line into * new buffers. */ { int i = optind + 1; ssize_t iline = 1, icol = 1; for (; i < argc; i++) { /* If there's a +LINE or +LINE,COLUMN flag here, it is * followed by at least one other argument, the filename it * applies to. */ if (i < argc - 1 && argv[i][0] == '+' && iline == 1 && icol == 1) parse_line_column(&argv[i][1], &iline, &icol); else { open_buffer(argv[i]); if (iline > 1 || icol > 1) { do_gotolinecolumn(iline, icol, FALSE, FALSE, FALSE, FALSE); iline = 1; icol = 1; } } } } #endif /* Read the first file on the command line into either the current * buffer or a new buffer, depending on whether multibuffer mode is * enabled. */ if (optind < argc) open_buffer(argv[optind]); /* We didn't open any files if all the command line arguments were * invalid files like directories or if there were no command line * arguments given. In this case, we have to load a blank buffer. * Also, we unset view mode to allow editing. */ if (openfile == NULL) { open_buffer(""); UNSET(VIEW_MODE); } #ifdef ENABLE_MULTIBUFFER if (!old_multibuffer) UNSET(MULTIBUFFER); #endif #ifdef DEBUG fprintf(stderr, "Main: top and bottom win\n"); #endif if (startline > 1 || startcol > 1) do_gotolinecolumn(startline, startcol, FALSE, FALSE, FALSE, FALSE); display_main_list(); display_buffer(); while (TRUE) { bool meta_key, func_key, s_or_t, ran_func, finished; /* Make sure the cursor is in the edit window. */ reset_cursor(); #ifndef NANO_TINY if (!jump_buf_main) { /* If we haven't already, we're going to set jump_buf so * that we return here after a SIGWINCH. Indicate this. */ jump_buf_main = TRUE; /* Return here after a SIGWINCH. */ sigsetjmp(jump_buf, 1); } #endif /* If constant cursor position display is on, and there are no * keys waiting in the input buffer, display the current cursor * position on the statusbar. */ if (ISSET(CONST_UPDATE) && get_key_buffer_len() == 0) do_cursorpos(TRUE); currshortcut = main_list; /* Read in and interpret characters. */ do_input(&meta_key, &func_key, &s_or_t, &ran_func, &finished, TRUE); } /* We should never get here. */ assert(FALSE); }