/* $Id$ */ /************************************************************************** * files.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 /* Add an entry to the openfile openfilestruct. This should only be * called from open_buffer(). */ void make_new_buffer(void) { /* If there are no entries in openfile, make the first one and * move to it. */ if (openfile == NULL) { openfile = make_new_opennode(); splice_opennode(openfile, openfile, openfile); /* Otherwise, make a new entry for openfile, splice it in after * the current entry, and move to it. */ } else { splice_opennode(openfile, make_new_opennode(), openfile->next); openfile = openfile->next; } /* Initialize the new buffer. */ initialize_buffer(); } /* Initialize the current entry of the openfile openfilestruct. */ void initialize_buffer(void) { assert(openfile != NULL); openfile->filename = mallocstrcpy(NULL, ""); initialize_buffer_text(); openfile->current_x = 0; openfile->placewewant = 0; openfile->current_y = 0; openfile->modified = FALSE; #ifndef NANO_TINY openfile->mark_set = FALSE; openfile->mark_begin = NULL; openfile->mark_begin_x = 0; openfile->fmt = NIX_FILE; openfile->current_stat = NULL; #endif #ifdef ENABLE_COLOR openfile->colorstrings = NULL; #endif } /* Initialize the text of the current entry of the openfile * openfilestruct. */ void initialize_buffer_text(void) { assert(openfile != NULL); openfile->fileage = make_new_node(NULL); openfile->fileage->data = mallocstrcpy(NULL, ""); openfile->filebot = openfile->fileage; openfile->edittop = openfile->fileage; openfile->current = openfile->fileage; openfile->totsize = 0; } /* If it's not "", filename is a file to open. We make a new buffer, if * necessary, and then open and read the file, if applicable. */ void open_buffer(const char *filename) { bool new_buffer = (openfile == NULL #ifdef ENABLE_MULTIBUFFER || ISSET(MULTIBUFFER) #endif ); /* Whether we load into this buffer or a new one. */ FILE *f; int rc; /* rc == -2 means that we have a new file. -1 means that the * open() failed. 0 means that the open() succeeded. */ assert(filename != NULL); #ifndef DISABLE_OPERATINGDIR if (check_operating_dir(filename, FALSE)) { statusbar(_("Can't insert file from outside of %s"), operating_dir); return; } #endif /* If the filename isn't blank, open the file. Otherwise, treat it * as a new file. */ rc = (filename[0] != '\0') ? open_file(filename, new_buffer, &f) : -2; /* If we're loading into a new buffer, add a new entry to * openfile. */ if (new_buffer) make_new_buffer(); /* If we have a file and we're loading into a new buffer, update the * filename. */ if (rc != -1 && new_buffer) openfile->filename = mallocstrcpy(openfile->filename, filename); /* If we have a non-new file, read it in. Then, if the buffer has * no stat, update the stat, if applicable. */ if (rc == 0) { read_file(f, filename); #ifndef NANO_TINY if (openfile->current_stat == NULL) { openfile->current_stat = (struct stat *)nmalloc(sizeof(struct stat)); stat(filename, openfile->current_stat); } #endif } /* If we have a file and we're loading into a new buffer, move back * to the beginning of the first line of the buffer. */ if (rc != -1 && new_buffer) { openfile->current = openfile->fileage; openfile->current_x = 0; openfile->placewewant = 0; } #ifdef ENABLE_COLOR /* If we're loading into a new buffer, update the colors to account * for it, if applicable. */ if (new_buffer) color_update(); #endif } #ifndef DISABLE_SPELLER /* If it's not "", filename is a file to open. We blow away the text of * the current buffer, and then open and read the file, if * applicable. Note that we skip the operating directory test when * doing this. */ void replace_buffer(const char *filename) { FILE *f; int rc; /* rc == -2 means that we have a new file. -1 means that the * open() failed. 0 means that the open() succeeded. */ assert(filename != NULL); /* If the filename isn't blank, open the file. Otherwise, treat it * as a new file. */ rc = (filename[0] != '\0') ? open_file(filename, TRUE, &f) : -2; /* Reinitialize the text of the current buffer. */ free_filestruct(openfile->fileage); initialize_buffer_text(); /* If we have a non-new file, read it in. */ if (rc == 0) read_file(f, filename); /* Move back to the beginning of the first line of the buffer. */ openfile->current = openfile->fileage; openfile->current_x = 0; openfile->placewewant = 0; } #endif /* !DISABLE_SPELLER */ /* Update the screen to account for the current buffer. */ void display_buffer(void) { /* Update the titlebar, since the filename may have changed. */ titlebar(NULL); #ifdef ENABLE_COLOR /* Make sure we're using the buffer's associated colors, if * applicable. */ color_init(); #endif /* Update the edit window. */ edit_refresh(); } #ifdef ENABLE_MULTIBUFFER /* Switch to the next file buffer if next_buf is TRUE. Otherwise, * switch to the previous file buffer. */ void switch_to_prevnext_buffer(bool next_buf) { assert(openfile != NULL); /* If only one file buffer is open, indicate it on the statusbar and * get out. */ if (openfile == openfile->next) { statusbar(_("No more open file buffers")); return; } /* Switch to the next or previous file buffer, depending on the * value of next_buf. */ openfile = next_buf ? openfile->next : openfile->prev; #ifdef DEBUG fprintf(stderr, "filename is %s\n", openfile->filename); #endif /* Update the screen to account for the current buffer. */ display_buffer(); /* Indicate the switch on the statusbar. */ statusbar(_("Switched to %s"), ((openfile->filename[0] == '\0') ? _("New Buffer") : openfile->filename)); #ifdef DEBUG dump_filestruct(openfile->current); #endif } /* Switch to the previous entry in the openfile filebuffer. */ void switch_to_prev_buffer_void(void) { switch_to_prevnext_buffer(FALSE); } /* Switch to the next entry in the openfile filebuffer. */ void switch_to_next_buffer_void(void) { switch_to_prevnext_buffer(TRUE); } /* Delete an entry from the openfile filebuffer, and switch to the one * after it. Return TRUE on success, or FALSE if there are no more open * file buffers. */ bool close_buffer(void) { assert(openfile != NULL); /* If only one file buffer is open, get out. */ if (openfile == openfile->next) return FALSE; /* Switch to the next file buffer. */ switch_to_next_buffer_void(); /* Close the file buffer we had open before. */ unlink_opennode(openfile->prev); display_main_list(); return TRUE; } #endif /* ENABLE_MULTIBUFFER */ /* We make a new line of text from buf. buf is length buf_len. If * first_line_ins is TRUE, then we put the new line at the top of the * file. Otherwise, we assume prevnode is the last line of the file, * and put our line after prevnode. */ filestruct *read_line(char *buf, filestruct *prevnode, bool *first_line_ins, size_t buf_len) { filestruct *fileptr = (filestruct *)nmalloc(sizeof(filestruct)); /* Convert nulls to newlines. buf_len is the string's real length * here. */ unsunder(buf, buf_len); assert(openfile->fileage != NULL && strlen(buf) == buf_len); fileptr->data = mallocstrcpy(NULL, buf); #ifndef NANO_TINY /* If it's a DOS file ("\r\n"), and file conversion isn't disabled, * strip the '\r' part from fileptr->data. */ if (!ISSET(NO_CONVERT) && buf_len > 0 && buf[buf_len - 1] == '\r') fileptr->data[buf_len - 1] = '\0'; #endif if (*first_line_ins) { /* Special case: We're inserting with the cursor on the first * line. */ fileptr->prev = NULL; fileptr->next = openfile->fileage; fileptr->lineno = 1; if (*first_line_ins) { *first_line_ins = FALSE; /* If we're inserting into the first line of the file, then * we want to make sure that our edit buffer stays on the * first line and that fileage stays up to date. */ openfile->edittop = fileptr; } else openfile->filebot = fileptr; openfile->fileage = fileptr; } else { assert(prevnode != NULL); fileptr->prev = prevnode; fileptr->next = NULL; fileptr->lineno = prevnode->lineno + 1; prevnode->next = fileptr; } return fileptr; } /* Read an open file into the current buffer. f should be set to the * open file, and filename should be set to the name of the file. */ void read_file(FILE *f, const char *filename) { size_t num_lines = 0; /* The number of lines in the file. */ size_t len = 0; /* The length of the current line of the file. */ size_t i = 0; /* The position in the current line of the file. */ size_t bufx = MAX_BUF_SIZE; /* The size of each chunk of the file that we read. */ char input = '\0'; /* The current input character. */ char *buf; /* The buffer where we store chunks of the file. */ filestruct *fileptr = openfile->current; /* The current line of the file. */ bool first_line_ins = FALSE; /* Whether we're inserting with the cursor on the first line. */ int input_int; /* The current value we read from the file, whether an input * character or EOF. */ #ifndef NANO_TINY int format = 0; /* 0 = *nix, 1 = DOS, 2 = Mac, 3 = both DOS and Mac. */ #endif assert(openfile->fileage != NULL && openfile->current != NULL); buf = charalloc(bufx); buf[0] = '\0'; if (openfile->current == openfile->fileage) first_line_ins = TRUE; else fileptr = openfile->current->prev; /* Read the entire file into the filestruct. */ while ((input_int = getc(f)) != EOF) { input = (char)input_int; /* If it's a *nix file ("\n") or a DOS file ("\r\n"), and file * conversion isn't disabled, handle it! */ if (input == '\n') { #ifndef NANO_TINY /* If there's a '\r' before the '\n', set format to DOS if * we currently think this is a *nix file, or to both if we * currently think it's a Mac file. */ if (!ISSET(NO_CONVERT) && i > 0 && buf[i - 1] == '\r' && (format == 0 || format == 2)) format++; #endif /* Read in the line properly. */ fileptr = read_line(buf, fileptr, &first_line_ins, len); /* Reset the line length in preparation for the next * line. */ len = 0; num_lines++; buf[0] = '\0'; i = 0; #ifndef NANO_TINY /* If it's a Mac file ('\r' without '\n'), and file conversion * isn't disabled, handle it! */ } else if (!ISSET(NO_CONVERT) && i > 0 && buf[i - 1] == '\r') { /* If we currently think the file is a *nix file, set format * to Mac. If we currently think the file is a DOS file, * set format to both DOS and Mac. */ if (format == 0 || format == 1) format += 2; /* Read in the line properly. */ fileptr = read_line(buf, fileptr, &first_line_ins, len); /* Reset the line length in preparation for the next line. * Since we've already read in the next character, reset it * to 1 instead of 0. */ len = 1; num_lines++; buf[0] = input; buf[1] = '\0'; i = 1; #endif } else { /* Calculate the total length of the line. It might have * nulls in it, so we can't just use strlen() here. */ len++; /* Now we allocate a bigger buffer MAX_BUF_SIZE characters * at a time. If we allocate a lot of space for one line, * we may indeed have to use a buffer this big later on, so * we don't decrease it at all. We do free it at the end, * though. */ if (i >= bufx - 1) { bufx += MAX_BUF_SIZE; buf = charealloc(buf, bufx); } buf[i] = input; buf[i + 1] = '\0'; i++; } } /* Perhaps this could use some better handling. */ if (ferror(f)) nperror(filename); fclose(f); #ifndef NANO_TINY /* If file conversion isn't disabled and the last character in this * file is '\r', read it in properly as a Mac format line. */ if (len == 0 && !ISSET(NO_CONVERT) && input == '\r') { len = 1; buf[0] = input; buf[1] = '\0'; } #endif /* Did we not get a newline and still have stuff to do? */ if (len > 0) { #ifndef NANO_TINY /* If file conversion isn't disabled and the last character in * this file is '\r', set format to Mac if we currently think * the file is a *nix file, or to both DOS and Mac if we * currently think the file is a DOS file. */ if (!ISSET(NO_CONVERT) && buf[len - 1] == '\r' && (format == 0 || format == 1)) format += 2; #endif /* Read in the last line properly. */ fileptr = read_line(buf, fileptr, &first_line_ins, len); num_lines++; } free(buf); /* If we didn't get a file and we don't already have one, open a * blank buffer. */ if (fileptr == NULL) open_buffer(""); /* Attach the file we got to the filestruct. If we got a file of * zero bytes, don't do anything. */ if (num_lines > 0) { /* If the file we got doesn't end in a newline, tack its last * line onto the beginning of the line at current. */ if (len > 0) { size_t current_len = strlen(openfile->current->data); /* Adjust the current x-coordinate to compensate for the * change in the current line. */ if (num_lines == 1) openfile->current_x += len; else openfile->current_x = len; /* Tack the text at fileptr onto the beginning of the text * at current. */ openfile->current->data = charealloc(openfile->current->data, len + current_len + 1); charmove(openfile->current->data + len, openfile->current->data, current_len + 1); strncpy(openfile->current->data, fileptr->data, len); /* Don't destroy fileage, edittop, or filebot! */ if (fileptr == openfile->fileage) openfile->fileage = openfile->current; if (fileptr == openfile->edittop) openfile->edittop = openfile->current; if (fileptr == openfile->filebot) openfile->filebot = openfile->current; /* Move fileptr back one line and blow away the old fileptr, * since its text has been saved. */ fileptr = fileptr->prev; if (fileptr != NULL) { if (fileptr->next != NULL) free(fileptr->next); } } /* Attach the line at current after the line at fileptr. */ if (fileptr != NULL) { fileptr->next = openfile->current; openfile->current->prev = fileptr; } /* Renumber starting with the last line of the file we * inserted. */ renumber(openfile->current); } openfile->totsize += get_totsize(openfile->fileage, openfile->filebot); /* If the NO_NEWLINES flag isn't set, and text has been added to * the magicline (i.e. a file that doesn't end in a newline has been * inserted at the end of the current buffer), add a new magicline, * and move the current line down to it. */ if (!ISSET(NO_NEWLINES) && openfile->filebot->data[0] != '\0') { new_magicline(); openfile->current = openfile->filebot; openfile->current_x = 0; } /* Set the current place we want to the end of the last line of the * file we inserted. */ openfile->placewewant = xplustabs(); #ifndef NANO_TINY if (format == 3) statusbar( P_("Read %lu line (Converted from DOS and Mac format)", "Read %lu lines (Converted from DOS and Mac format)", (unsigned long)num_lines), (unsigned long)num_lines); else if (format == 2) { openfile->fmt = MAC_FILE; statusbar(P_("Read %lu line (Converted from Mac format)", "Read %lu lines (Converted from Mac format)", (unsigned long)num_lines), (unsigned long)num_lines); } else if (format == 1) { openfile->fmt = DOS_FILE; statusbar(P_("Read %lu line (Converted from DOS format)", "Read %lu lines (Converted from DOS format)", (unsigned long)num_lines), (unsigned long)num_lines); } else #endif statusbar(P_("Read %lu line", "Read %lu lines", (unsigned long)num_lines), (unsigned long)num_lines); } /* Open the file (and decide if it exists). If newfie is TRUE, display * "New File" if the file is missing. Otherwise, say "[filename] not * found". * * Return -2 if we say "New File". Otherwise, -1 if the file isn't * opened, 0 otherwise. The file might still have an error while * reading with a 0 return value. *f is set to the opened file. */ int open_file(const char *filename, bool newfie, FILE **f) { struct stat fileinfo; int fd; assert(filename != NULL && f != NULL); if (stat(filename, &fileinfo) == -1) { if (newfie) { statusbar(_("New File")); return -2; } statusbar(_("\"%s\" not found"), filename); beep(); return -1; } else if (S_ISDIR(fileinfo.st_mode) || S_ISCHR(fileinfo.st_mode) || S_ISBLK(fileinfo.st_mode)) { /* Don't open directories, character files, or block files. * Sorry, /dev/sndstat! */ statusbar(S_ISDIR(fileinfo.st_mode) ? _("\"%s\" is a directory") : _("\"%s\" is a device file"), filename); beep(); return -1; } else if ((fd = open(filename, O_RDONLY)) == -1) { statusbar(_("Error reading %s: %s"), filename, strerror(errno)); beep(); return -1; } else { /* The file is A-OK. Open it. */ *f = fdopen(fd, "rb"); if (*f == NULL) { statusbar(_("Error reading %s: %s"), filename, strerror(errno)); beep(); close(fd); } else statusbar(_("Reading File")); } return 0; } /* This function will return the name of the first available extension * of a filename (starting with [name][suffix], then [name][suffix].1, * etc.). Memory is allocated for the return value. If no writable * extension exists, we return "". */ char *get_next_filename(const char *name, const char *suffix) { static int ulmax_digits = -1; unsigned long i = 0; char *buf; size_t namelen, suffixlen; assert(name != NULL && suffix != NULL); if (ulmax_digits == -1) ulmax_digits = digits(ULONG_MAX); namelen = strlen(name); suffixlen = strlen(suffix); buf = charalloc(namelen + suffixlen + ulmax_digits + 2); sprintf(buf, "%s%s", name, suffix); while (TRUE) { struct stat fs; if (stat(buf, &fs) == -1) return buf; if (i == ULONG_MAX) break; i++; sprintf(buf + namelen + suffixlen, ".%lu", i); } /* We get here only if there is no possible save file. Blank out * the filename to indicate this. */ null_at(&buf, 0); return buf; } /* Insert a file into a new buffer if the MULTIBUFFER flag is set, or * into the current buffer if it isn't. If execute is TRUE, insert the * output of an executed command instead of a file. */ void do_insertfile( #ifndef NANO_TINY bool execute #else void #endif ) { int i; const char *msg; char *ans = mallocstrcpy(NULL, ""); /* The last answer the user typed on the statusbar. */ filestruct *edittop_save = openfile->edittop; size_t current_x_save = openfile->current_x; ssize_t current_y_save = openfile->current_y; bool at_edittop = FALSE; /* Whether we're at the top of the edit window. */ while (TRUE) { #ifndef NANO_TINY if (execute) { msg = #ifdef ENABLE_MULTIBUFFER ISSET(MULTIBUFFER) ? _("Command to execute in new buffer [from %s] ") : #endif _("Command to execute [from %s] "); } else { #endif msg = #ifdef ENABLE_MULTIBUFFER ISSET(MULTIBUFFER) ? _("File to insert into new buffer [from %s] ") : #endif _("File to insert [from %s] "); #ifndef NANO_TINY } #endif i = do_prompt(TRUE, #ifndef DISABLE_TABCOMP TRUE, #endif #ifndef NANO_TINY execute ? extcmd_list : #endif insertfile_list, ans, #ifndef NANO_TINY NULL, #endif edit_refresh, msg, #ifndef DISABLE_OPERATINGDIR operating_dir != NULL && strcmp(operating_dir, ".") != 0 ? operating_dir : #endif "./"); /* If we're in multibuffer mode and the filename or command is * blank, open a new buffer instead of canceling. */ if (i == -1 || (i == -2 #ifdef ENABLE_MULTIBUFFER && !ISSET(MULTIBUFFER) #endif )) { statusbar(_("Cancelled")); break; } else { size_t pww_save = openfile->placewewant; ans = mallocstrcpy(ans, answer); #ifndef NANO_TINY #ifdef ENABLE_MULTIBUFFER if (i == TOGGLE_MULTIBUFFER_KEY) { /* Don't allow toggling if we're in view mode. */ if (!ISSET(VIEW_MODE)) TOGGLE(MULTIBUFFER); continue; } else #endif if (i == NANO_TOOTHERINSERT_KEY) { execute = !execute; continue; } #ifndef DISABLE_BROWSER else #endif #endif /* !NANO_TINY */ #ifndef DISABLE_BROWSER if (i == NANO_TOFILES_KEY) { char *tmp = do_browse_from(answer); if (tmp == NULL) continue; /* We have a file now. Indicate this. */ free(answer); answer = tmp; i = 0; } #endif /* If we don't have a file yet, go back to the statusbar * prompt. */ if (i != 0 #ifdef ENABLE_MULTIBUFFER && (i != -2 || !ISSET(MULTIBUFFER)) #endif ) continue; #ifdef ENABLE_MULTIBUFFER if (!ISSET(MULTIBUFFER)) { #endif /* If we're not inserting into a new buffer, partition * the filestruct so that it contains no text and hence * looks like a new buffer, and keep track of whether * the top of the partition is the top of the edit * window. */ filepart = partition_filestruct(openfile->current, openfile->current_x, openfile->current, openfile->current_x); at_edittop = (openfile->fileage == openfile->edittop); #ifdef ENABLE_MULTIBUFFER } #endif #ifndef NANO_TINY if (execute) { #ifdef ENABLE_MULTIBUFFER if (ISSET(MULTIBUFFER)) /* Open a blank buffer. */ open_buffer(""); #endif /* Save the command's output in the current buffer. */ execute_command(answer); #ifdef ENABLE_MULTIBUFFER if (ISSET(MULTIBUFFER)) { /* Move back to the beginning of the first line of * the buffer. */ openfile->current = openfile->fileage; openfile->current_x = 0; openfile->placewewant = 0; } #endif } else { #endif /* !NANO_TINY */ /* Make sure the path to the file specified in answer is * tilde-expanded. */ answer = mallocstrassn(answer, real_dir_from_tilde(answer)); /* Save the file specified in answer in the current * buffer. */ open_buffer(answer); #ifndef NANO_TINY } #endif #ifdef ENABLE_MULTIBUFFER if (ISSET(MULTIBUFFER)) /* Update the screen to account for the current * buffer. */ display_buffer(); else #endif { filestruct *top_save = openfile->fileage; /* If we were at the top of the edit window before, set * the saved value of edittop to the new top of the edit * window. */ if (at_edittop) edittop_save = openfile->fileage; /* Update the current x-coordinate to account for the * number of characters inserted on the current line. */ openfile->current_x = strlen(openfile->filebot->data); if (openfile->fileage == openfile->filebot) openfile->current_x += current_x_save; /* Update the current y-coordinate to account for the * number of lines inserted. */ openfile->current_y += current_y_save; /* Unpartition the filestruct so that it contains all * the text again. Note that we've replaced the * non-text originally in the partition with the text in * the inserted file/executed command output. */ unpartition_filestruct(&filepart); /* Renumber starting with the beginning line of the old * partition. */ renumber(top_save); /* Restore the old edittop. */ openfile->edittop = edittop_save; /* Restore the old place we want. */ openfile->placewewant = pww_save; /* Mark the file as modified. */ set_modified(); /* Update the screen. */ edit_refresh(); } break; } } free(ans); } /* Insert a file into a new buffer or the current buffer, depending on * whether the MULTIBUFFER flag is set. If we're in view mode, only * allow inserting a file into a new buffer. */ void do_insertfile_void(void) { #ifdef ENABLE_MULTIBUFFER if (ISSET(VIEW_MODE) && !ISSET(MULTIBUFFER)) statusbar(_("Key invalid in non-multibuffer mode")); else #endif do_insertfile( #ifndef NANO_TINY FALSE #endif ); display_main_list(); } /* When passed "[relative path]" or "[relative path][filename]" in * origpath, return "[full path]" or "[full path][filename]" on success, * or NULL on error. Do this if the file doesn't exist but the relative * path does, since the file could exist in memory but not yet on disk). * Don't do this if the relative path doesn't exist, since we won't be * able to go there. */ char *get_full_path(const char *origpath) { struct stat fileinfo; char *d_here, *d_there, *d_there_file = NULL; const char *last_slash; bool path_only; if (origpath == NULL) return NULL; /* Get the current directory. If it doesn't exist, back up and try * again until we get a directory that does, and use that as the * current directory. */ d_here = charalloc(PATH_MAX + 1); d_here = getcwd(d_here, PATH_MAX + 1); while (d_here == NULL) { if (chdir("..") == -1) break; d_here = getcwd(d_here, PATH_MAX + 1); } /* If we succeeded, canonicalize it in d_here. */ if (d_here != NULL) { align(&d_here); /* If the current directory isn't "/", tack a slash onto the end * of it. */ if (strcmp(d_here, "/") != 0) { d_here = charealloc(d_here, strlen(d_here) + 2); strcat(d_here, "/"); } /* Otherwise, set d_here to "". */ } else d_here = mallocstrcpy(NULL, ""); d_there = real_dir_from_tilde(origpath); /* If stat()ing d_there fails, assume that d_there refers to a new * file that hasn't been saved to disk yet. Set path_only to TRUE * if d_there refers to a directory, and FALSE otherwise. */ path_only = (stat(d_there, &fileinfo) != -1 && S_ISDIR(fileinfo.st_mode)); /* If path_only is TRUE, make sure d_there ends in a slash. */ if (path_only) { size_t d_there_len = strlen(d_there); if (d_there[d_there_len - 1] != '/') { d_there = charealloc(d_there, d_there_len + 2); strcat(d_there, "/"); } } /* Search for the last slash in d_there. */ last_slash = strrchr(d_there, '/'); /* If we didn't find one, then make sure the answer is in the format * "d_here/d_there". */ if (last_slash == NULL) { assert(!path_only); d_there_file = d_there; d_there = d_here; } else { /* If path_only is FALSE, then save the filename portion of the * answer (everything after the last slash) in d_there_file. */ if (!path_only) d_there_file = mallocstrcpy(NULL, last_slash + 1); /* Remove the filename portion of the answer from d_there. */ null_at(&d_there, last_slash - d_there + 1); /* Go to the path specified in d_there. */ if (chdir(d_there) == -1) { free(d_there); d_there = NULL; } else { free(d_there); /* Get the full path. */ d_there = charalloc(PATH_MAX + 1); d_there = getcwd(d_there, PATH_MAX + 1); /* If we succeeded, canonicalize it in d_there. */ if (d_there != NULL) { align(&d_there); /* If the current directory isn't "/", tack a slash onto * the end of it. */ if (strcmp(d_there, "/") != 0) { d_there = charealloc(d_there, strlen(d_there) + 2); strcat(d_there, "/"); } } else /* Otherwise, set path_only to TRUE, so that we clean up * correctly, free all allocated memory, and return * NULL. */ path_only = TRUE; /* Finally, go back to the path specified in d_here, * where we were before. We don't check for a chdir() * error, since we can do nothing if we get one. */ chdir(d_here); /* Free d_here, since we're done using it. */ free(d_here); } } /* At this point, if path_only is FALSE and d_there isn't NULL, * d_there contains the path portion of the answer and d_there_file * contains the filename portion of the answer. If this is the * case, tack the latter onto the end of the former. d_there will * then contain the complete answer. */ if (!path_only && d_there != NULL) { d_there = charealloc(d_there, strlen(d_there) + strlen(d_there_file) + 1); strcat(d_there, d_there_file); } /* Free d_there_file, since we're done using it. */ if (d_there_file != NULL) free(d_there_file); return d_there; } /* Return the full version of path, as returned by get_full_path(). On * error, if path doesn't reference a directory, or if the directory * isn't writable, return NULL. */ char *check_writable_directory(const char *path) { char *full_path = get_full_path(path); /* If get_full_path() fails, return NULL. */ if (full_path == NULL) return NULL; /* If we can't write to path or path isn't a directory, return * NULL. */ if (access(full_path, W_OK) != 0 || full_path[strlen(full_path) - 1] != '/') { free(full_path); return NULL; } /* Otherwise, return the full path. */ return full_path; } /* This function calls mkstemp(($TMPDIR|P_tmpdir|/tmp/)"nano.XXXXXX"). * On success, it returns the malloc()ed filename and corresponding FILE * stream, opened in "r+b" mode. On error, it returns NULL for the * filename and leaves the FILE stream unchanged. */ char *safe_tempfile(FILE **f) { char *full_tempdir = NULL; const char *tmpdir_env; int fd; mode_t original_umask = 0; assert(f != NULL); /* If $TMPDIR is set, set tempdir to it, run it through * get_full_path(), and save the result in full_tempdir. Otherwise, * leave full_tempdir set to NULL. */ tmpdir_env = getenv("TMPDIR"); if (tmpdir_env != NULL) full_tempdir = check_writable_directory(tmpdir_env); /* If $TMPDIR is unset, empty, or not a writable directory, and * full_tempdir is NULL, try P_tmpdir instead. */ if (full_tempdir == NULL) full_tempdir = check_writable_directory(P_tmpdir); /* if P_tmpdir is NULL, use /tmp. */ if (full_tempdir == NULL) full_tempdir = mallocstrcpy(NULL, "/tmp/"); full_tempdir = charealloc(full_tempdir, strlen(full_tempdir) + 12); strcat(full_tempdir, "nano.XXXXXX"); original_umask = umask(0); umask(S_IRWXG | S_IRWXO); fd = mkstemp(full_tempdir); if (fd != -1) *f = fdopen(fd, "r+b"); else { free(full_tempdir); full_tempdir = NULL; } umask(original_umask); return full_tempdir; } #ifndef DISABLE_OPERATINGDIR /* Initialize full_operating_dir based on operating_dir. */ void init_operating_dir(void) { assert(full_operating_dir == NULL); if (operating_dir == NULL) return; full_operating_dir = get_full_path(operating_dir); /* If get_full_path() failed or the operating directory is * inaccessible, unset operating_dir. */ if (full_operating_dir == NULL || chdir(full_operating_dir) == -1) { free(full_operating_dir); full_operating_dir = NULL; free(operating_dir); operating_dir = NULL; } } /* Check to see if we're inside the operating directory. Return FALSE * if we are, or TRUE otherwise. If allow_tabcomp is TRUE, allow * incomplete names that would be matches for the operating directory, * so that tab completion will work. */ bool check_operating_dir(const char *currpath, bool allow_tabcomp) { /* full_operating_dir is global for memory cleanup. It should have * already been initialized by init_operating_dir(). Also, a * relative operating directory path will only be handled properly * if this is done. */ char *fullpath; bool retval = FALSE; const char *whereami1, *whereami2 = NULL; /* If no operating directory is set, don't bother doing anything. */ if (operating_dir == NULL) return FALSE; assert(full_operating_dir != NULL); fullpath = get_full_path(currpath); /* If fullpath is NULL, it means some directory in the path doesn't * exist or is unreadable. If allow_tabcomp is FALSE, then currpath * is what the user typed somewhere. We don't want to report a * non-existent directory as being outside the operating directory, * so we return FALSE. If allow_tabcomp is TRUE, then currpath * exists, but is not executable. So we say it isn't in the * operating directory. */ if (fullpath == NULL) return allow_tabcomp; whereami1 = strstr(fullpath, full_operating_dir); if (allow_tabcomp) whereami2 = strstr(full_operating_dir, fullpath); /* If both searches failed, we're outside the operating directory. * Otherwise, check the search results. If the full operating * directory path is not at the beginning of the full current path * (for normal usage) and vice versa (for tab completion, if we're * allowing it), we're outside the operating directory. */ if (whereami1 != fullpath && whereami2 != full_operating_dir) retval = TRUE; free(fullpath); /* Otherwise, we're still inside it. */ return retval; } #endif #ifndef NANO_TINY void init_backup_dir(void) { char *full_backup_dir; if (backup_dir == NULL) return; full_backup_dir = get_full_path(backup_dir); /* If get_full_path() failed or the backup directory is * inaccessible, unset backup_dir. */ if (full_backup_dir == NULL || full_backup_dir[strlen(full_backup_dir) - 1] != '/') { free(full_backup_dir); free(backup_dir); backup_dir = NULL; } else { free(backup_dir); backup_dir = full_backup_dir; } } #endif /* Read from inn, write to out. We assume inn is opened for reading, * and out for writing. We return 0 on success, -1 on read error, or -2 * on write error. */ int copy_file(FILE *inn, FILE *out) { char buf[BUFSIZ]; size_t charsread; int retval = 0; assert(inn != NULL && out != NULL); do { charsread = fread(buf, sizeof(char), BUFSIZ, inn); if (charsread == 0 && ferror(inn)) { retval = -1; break; } if (fwrite(buf, sizeof(char), charsread, out) < charsread) { retval = -2; break; } } while (charsread > 0); if (fclose(inn) == EOF) retval = -1; if (fclose(out) == EOF) retval = -2; return retval; } /* Write a file out. If f_open isn't NULL, we assume that it is a * stream associated with the file, and we don't try to open it * ourselves. If tmp is TRUE, we set the umask to disallow anyone else * from accessing the file, we don't set the filename to its name, and * we don't print out how many lines we wrote on the statusbar. * * tmp means we are writing a temporary file in a secure fashion. We * use it when spell checking or dumping the file on an error. * * append == APPEND means we are appending instead of overwriting. * append == PREPEND means we are prepending instead of overwriting. * * nonamechange means don't change the current filename. It is ignored * if tmp is FALSE or if we're appending/prepending. * * Return 0 on success or -1 on error. */ int write_file(const char *name, FILE *f_open, bool tmp, append_type append, bool nonamechange) { int retval = -1; /* Instead of returning in this function, you should always * merely set retval and then goto cleanup_and_exit. */ size_t lineswritten = 0; const filestruct *fileptr = openfile->fileage; int fd; /* The file descriptor we use. */ mode_t original_umask = 0; /* Our umask, from when nano started. */ bool realexists; /* The result of stat(). TRUE if the file exists, FALSE * otherwise. If name is a link that points nowhere, realexists * is FALSE. */ struct stat st; /* The status fields filled in by stat(). */ bool anyexists; /* The result of lstat(). The same as realexists, unless name * is a link. */ struct stat lst; /* The status fields filled in by lstat(). */ char *realname; /* name after tilde expansion. */ FILE *f = NULL; /* The actual file, realname, we are writing to. */ char *tempname = NULL; /* The temp file name we write to on prepend. */ assert(name != NULL); if (name[0] == '\0') return -1; if (f_open != NULL) f = f_open; if (!tmp) titlebar(NULL); realname = real_dir_from_tilde(name); #ifndef DISABLE_OPERATINGDIR /* If we're writing a temporary file, we're probably going outside * the operating directory, so skip the operating directory test. */ if (!tmp && check_operating_dir(realname, FALSE)) { statusbar(_("Can't write outside of %s"), operating_dir); goto cleanup_and_exit; } #endif anyexists = (lstat(realname, &lst) != -1); /* If the temp file exists and isn't already open, give up. */ if (tmp && anyexists && f_open == NULL) goto cleanup_and_exit; /* If NOFOLLOW_SYMLINKS is set, it doesn't make sense to prepend or * append to a symlink. Here we warn about the contradiction. */ if (ISSET(NOFOLLOW_SYMLINKS) && anyexists && S_ISLNK(lst.st_mode)) { statusbar( _("Cannot prepend or append to a symlink with --nofollow set")); goto cleanup_and_exit; } /* Save the state of the file at the end of the symlink (if there is * one). */ realexists = (stat(realname, &st) != -1); #ifndef NANO_TINY /* We backup only if the backup toggle is set, the file isn't * temporary, and the file already exists. Furthermore, if we * aren't appending, prepending, or writing a selection, we backup * only if the file has not been modified by someone else since nano * opened it. */ if (ISSET(BACKUP_FILE) && !tmp && realexists && ((append != OVERWRITE || openfile->mark_set) || openfile->current_stat->st_mtime == st.st_mtime)) { FILE *backup_file; char *backupname; struct utimbuf filetime; int copy_status; /* Save the original file's access and modification times. */ filetime.actime = openfile->current_stat->st_atime; filetime.modtime = openfile->current_stat->st_mtime; if (f_open == NULL) { /* Open the original file to copy to the backup. */ f = fopen(realname, "rb"); if (f == NULL) { statusbar(_("Error reading %s: %s"), realname, strerror(errno)); beep(); /* If we can't read from the original file, go on, since * only saving the original file is better than saving * nothing. */ goto skip_backup; } } /* If backup_dir is set, we set backupname to * backup_dir/backupname~[.number], where backupname is the * canonicalized absolute pathname of realname with every '/' * replaced with a '!'. This means that /home/foo/file is * backed up in backup_dir/!home!foo!file~[.number]. */ if (backup_dir != NULL) { char *backuptemp = get_full_path(realname); if (backuptemp == NULL) /* If get_full_path() failed, we don't have a * canonicalized absolute pathname, so just use the * filename portion of the pathname. We use tail() so * that e.g. ../backupname will be backed up in * backupdir/backupname~ instead of * backupdir/../backupname~. */ backuptemp = mallocstrcpy(NULL, tail(realname)); else { size_t i = 0; for (; backuptemp[i] != '\0'; i++) { if (backuptemp[i] == '/') backuptemp[i] = '!'; } } backupname = charalloc(strlen(backup_dir) + strlen(backuptemp) + 1); sprintf(backupname, "%s%s", backup_dir, backuptemp); free(backuptemp); backuptemp = get_next_filename(backupname, "~"); if (backuptemp[0] == '\0') { statusbar(_("Error writing %s: %s"), backupname, _("Too many backup files?")); free(backuptemp); free(backupname); /* If we can't write to the backup, go on, since only * saving the original file is better than saving * nothing. */ goto skip_backup; } else { free(backupname); backupname = backuptemp; } } else { backupname = charalloc(strlen(realname) + 2); sprintf(backupname, "%s~", realname); } /* Open the destination backup file. Before we write to it, we * set its permissions, so no unauthorized person can read it as * we write. */ backup_file = fopen(backupname, "wb"); if (backup_file == NULL || chmod(backupname, openfile->current_stat->st_mode) == -1) { statusbar(_("Error writing %s: %s"), backupname, strerror(errno)); free(backupname); if (backup_file != NULL) fclose(backup_file); /* If we can't write to the backup, go on, since only saving * the original file is better than saving nothing. */ goto skip_backup; } #ifdef DEBUG fprintf(stderr, "Backing up %s to %s\n", realname, backupname); #endif /* Copy the file. */ copy_status = copy_file(f, backup_file); /* And set its metadata. */ if (copy_status != 0 || chown(backupname, openfile->current_stat->st_uid, openfile->current_stat->st_gid) == -1 || utime(backupname, &filetime) == -1) { if (copy_status == -1) { statusbar(_("Error reading %s: %s"), realname, strerror(errno)); beep(); } else statusbar(_("Error writing %s: %s"), backupname, strerror(errno)); /* If we can't read from or write to the backup, go on, * since only saving the original file is better than saving * nothing. */ } free(backupname); } skip_backup: #endif /* !NANO_TINY */ /* If NOFOLLOW_SYMLINKS is set and the file is a link, we aren't * doing prepend or append. So we delete the link first, and just * overwrite. */ if (ISSET(NOFOLLOW_SYMLINKS) && anyexists && S_ISLNK(lst.st_mode) && unlink(realname) == -1) { statusbar(_("Error writing %s: %s"), realname, strerror(errno)); goto cleanup_and_exit; } if (f_open == NULL) { original_umask = umask(0); /* If we create a temp file, we don't let anyone else access it. * We create a temp file if tmp is TRUE. */ if (tmp) umask(S_IRWXG | S_IRWXO); else umask(original_umask); } /* If we're prepending, copy the file to a temp file. */ if (append == PREPEND) { int fd_source; FILE *f_source = NULL; if (f == NULL) { f = fopen(realname, "rb"); if (f == NULL) { statusbar(_("Error reading %s: %s"), realname, strerror(errno)); beep(); goto cleanup_and_exit; } } tempname = safe_tempfile(&f); if (tempname == NULL) { statusbar(_("Error writing temp file: %s"), strerror(errno)); goto cleanup_and_exit; } if (f_open == NULL) { fd_source = open(realname, O_RDONLY | O_CREAT); if (fd_source != -1) { f_source = fdopen(fd_source, "rb"); if (f_source == NULL) { statusbar(_("Error reading %s: %s"), realname, strerror(errno)); beep(); close(fd_source); fclose(f); unlink(tempname); goto cleanup_and_exit; } } } if (copy_file(f_source, f) != 0) { statusbar(_("Error writing %s: %s"), tempname, strerror(errno)); unlink(tempname); goto cleanup_and_exit; } } if (f_open == NULL) { /* Now open the file in place. Use O_EXCL if tmp is TRUE. This * is copied from joe, because wiggy says so *shrug*. */ fd = open(realname, O_WRONLY | O_CREAT | ((append == APPEND) ? O_APPEND : (tmp ? O_EXCL : O_TRUNC)), S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); /* Set the umask back to the user's original value. */ umask(original_umask); /* If we couldn't open the file, give up. */ if (fd == -1) { statusbar(_("Error writing %s: %s"), realname, strerror(errno)); /* tempname has been set only if we're prepending. */ if (tempname != NULL) unlink(tempname); goto cleanup_and_exit; } f = fdopen(fd, (append == APPEND) ? "ab" : "wb"); if (f == NULL) { statusbar(_("Error writing %s: %s"), realname, strerror(errno)); close(fd); goto cleanup_and_exit; } } /* There might not be a magicline. There won't be when writing out * a selection. */ assert(openfile->fileage != NULL && openfile->filebot != NULL); while (fileptr != NULL) { size_t data_len = strlen(fileptr->data), size; /* Newlines to nulls, just before we write to disk. */ sunder(fileptr->data); size = fwrite(fileptr->data, sizeof(char), data_len, f); /* Nulls to newlines; data_len is the string's real length. */ unsunder(fileptr->data, data_len); if (size < data_len) { statusbar(_("Error writing %s: %s"), realname, strerror(errno)); fclose(f); goto cleanup_and_exit; } /* If we're on the last line of the file, don't write a newline * character after it. If the last line of the file is blank, * this means that zero bytes are written, in which case we * don't count the last line in the total lines written. */ if (fileptr == openfile->filebot) { if (fileptr->data[0] == '\0') lineswritten--; } else { #ifndef NANO_TINY if (openfile->fmt == DOS_FILE || openfile->fmt == MAC_FILE) { if (putc('\r', f) == EOF) { statusbar(_("Error writing %s: %s"), realname, strerror(errno)); fclose(f); goto cleanup_and_exit; } } if (openfile->fmt != MAC_FILE) { #endif if (putc('\n', f) == EOF) { statusbar(_("Error writing %s: %s"), realname, strerror(errno)); fclose(f); goto cleanup_and_exit; } #ifndef NANO_TINY } #endif } fileptr = fileptr->next; lineswritten++; } /* If we're prepending, open the temp file, and append it to f. */ if (append == PREPEND) { int fd_source; FILE *f_source = NULL; fd_source = open(tempname, O_RDONLY | O_CREAT); if (fd_source != -1) { f_source = fdopen(fd_source, "rb"); if (f_source == NULL) close(fd_source); } if (f_source == NULL) { statusbar(_("Error reading %s: %s"), tempname, strerror(errno)); beep(); fclose(f); goto cleanup_and_exit; } if (copy_file(f_source, f) == -1 || unlink(tempname) == -1) { statusbar(_("Error writing %s: %s"), realname, strerror(errno)); goto cleanup_and_exit; } } else fclose(f); if (!tmp && append == OVERWRITE) { if (!nonamechange) { openfile->filename = mallocstrcpy(openfile->filename, realname); #ifdef ENABLE_COLOR /* We might have changed the filename, so update the colors * to account for it, and then make sure we're using * them. */ color_update(); color_init(); /* If color syntaxes are available and turned on, we need to * call edit_refresh(). */ if (openfile->colorstrings != NULL && !ISSET(NO_COLOR_SYNTAX)) edit_refresh(); #endif } #ifndef NANO_TINY /* Update current_stat to reference the file as it is now. */ if (openfile->current_stat == NULL) openfile->current_stat = (struct stat *)nmalloc(sizeof(struct stat)); stat(realname, openfile->current_stat); #endif statusbar(P_("Wrote %lu line", "Wrote %lu lines", (unsigned long)lineswritten), (unsigned long)lineswritten); openfile->modified = FALSE; titlebar(NULL); } retval = 0; cleanup_and_exit: free(realname); free(tempname); return retval; } #ifndef NANO_TINY /* Write a marked selection from a file out. */ int write_marked_file(const char *name, FILE *f_open, bool tmp, append_type append) { int retval = -1; bool old_modified = openfile->modified; /* write_file() unsets the modified flag. */ bool added_magicline = FALSE; /* Whether we added a magicline after filebot. */ filestruct *top, *bot; size_t top_x, bot_x; assert(openfile->mark_set); /* Partition the filestruct so that it contains only the marked * text. */ mark_order((const filestruct **)&top, &top_x, (const filestruct **)&bot, &bot_x, NULL); filepart = partition_filestruct(top, top_x, bot, bot_x); /* Handle the magicline if the NO_NEWLINES flag isn't set. If the * line at filebot is blank, treat it as the magicline and hence the * end of the file. Otherwise, add a magicline and treat it as the * end of the file. */ if (!ISSET(NO_NEWLINES) && (added_magicline = (openfile->filebot->data[0] != '\0'))) new_magicline(); retval = write_file(name, f_open, tmp, append, TRUE); /* If the NO_NEWLINES flag isn't set, and we added a magicline, * remove it now. */ if (!ISSET(NO_NEWLINES) && added_magicline) remove_magicline(); /* Unpartition the filestruct so that it contains all the text * again. */ unpartition_filestruct(&filepart); if (old_modified) set_modified(); return retval; } #endif /* !NANO_TINY */ /* Write the current file to disk. If the mark is on, write the current * marked selection to disk. If exiting is TRUE, write the file to disk * regardless of whether the mark is on, and without prompting if the * TEMP_FILE flag is set. */ int do_writeout(bool exiting) { int i, retval = 0; append_type append = OVERWRITE; char *ans; /* The last answer the user typed on the statusbar. */ #ifdef NANO_EXTRA static bool did_credits = FALSE; #endif currshortcut = writefile_list; if (exiting && openfile->filename[0] != '\0' && ISSET(TEMP_FILE)) { retval = write_file(openfile->filename, NULL, FALSE, OVERWRITE, FALSE); /* Write succeeded. */ if (retval == 0) return retval; } ans = mallocstrcpy(NULL, #ifndef NANO_TINY (!exiting && openfile->mark_set) ? "" : #endif openfile->filename); while (TRUE) { const char *msg; #ifndef NANO_TINY const char *formatstr, *backupstr; formatstr = (openfile->fmt == DOS_FILE) ? _(" [DOS Format]") : (openfile->fmt == MAC_FILE) ? _(" [Mac Format]") : ""; backupstr = ISSET(BACKUP_FILE) ? _(" [Backup]") : ""; if (!exiting && openfile->mark_set) msg = (append == PREPEND) ? _("Prepend Selection to File") : (append == APPEND) ? _("Append Selection to File") : _("Write Selection to File"); else #endif /* !NANO_TINY */ msg = (append == PREPEND) ? _("File Name to Prepend to") : (append == APPEND) ? _("File Name to Append to") : _("File Name to Write"); /* If we're using restricted mode, the filename isn't blank, * and we're at the "Write File" prompt, disable tab * completion. */ i = do_prompt(!ISSET(RESTRICTED) || openfile->filename[0] == '\0', #ifndef DISABLE_TABCOMP TRUE, #endif writefile_list, ans, #ifndef NANO_TINY NULL, #endif edit_refresh, "%s%s%s", msg, #ifndef NANO_TINY formatstr, backupstr #else "", "" #endif ); if (i < 0) { statusbar(_("Cancelled")); retval = -1; break; } else { ans = mallocstrcpy(ans, answer); #ifndef DISABLE_BROWSER if (i == NANO_TOFILES_KEY) { char *tmp = do_browse_from(answer); if (tmp == NULL) continue; /* We have a file now. Indicate this. */ free(answer); answer = tmp; } else #endif /* !DISABLE_BROWSER */ #ifndef NANO_TINY if (i == TOGGLE_DOS_KEY) { openfile->fmt = (openfile->fmt == DOS_FILE) ? NIX_FILE : DOS_FILE; continue; } else if (i == TOGGLE_MAC_KEY) { openfile->fmt = (openfile->fmt == MAC_FILE) ? NIX_FILE : MAC_FILE; continue; } else if (i == TOGGLE_BACKUP_KEY) { TOGGLE(BACKUP_FILE); continue; } else #endif /* !NANO_TINY */ if (i == NANO_PREPEND_KEY) { append = (append == PREPEND) ? OVERWRITE : PREPEND; continue; } else if (i == NANO_APPEND_KEY) { append = (append == APPEND) ? OVERWRITE : APPEND; continue; } #ifdef DEBUG fprintf(stderr, "filename is %s\n", answer); #endif #ifdef NANO_EXTRA /* If the current file has been modified, we've pressed * Ctrl-X at the edit window to exit, we've pressed "y" at * the "Save modified buffer" prompt to save, we've entered * "zzy" as the filename to save under (hence "xyzzy"), and * this is the first time we've done this, show an Easter * egg. Display the credits. */ if (!did_credits && exiting && !ISSET(TEMP_FILE) && strcasecmp(answer, "zzy") == 0) { do_credits(); did_credits = TRUE; retval = -1; break; } #endif if (append == OVERWRITE) { char *full_answer = get_full_path(answer); char *full_filename = get_full_path(openfile->filename); bool different_name = (strcmp(full_answer, full_filename) != 0); struct stat st; bool name_exists = (stat(full_answer, &st) != -1); free(full_filename); free(full_answer); if (different_name) { if (name_exists) { /* If we're using restricted mode, we aren't * allowed to save a new file under the name of * an existing file. */ if (ISSET(RESTRICTED)) continue; else { i = do_yesno_prompt(FALSE, _("File exists, OVERWRITE ? ")); if (i == 0 || i == -1) continue; } /* If we're using restricted mode, we aren't allowed * to change the name of a file once it has one, * because that would allow reading from or writing * to files not specified on the command line. */ } else if (!ISSET(RESTRICTED) && openfile->filename[0] != '\0' #ifndef NANO_TINY && (exiting || !openfile->mark_set) #endif ) { i = do_yesno_prompt(FALSE, _("Save file under DIFFERENT NAME ? ")); if (i == 0 || i == -1) continue; } } } #ifndef NANO_TINY /* Here's where we allow the selected text to be written to * a separate file. If we're using restricted mode, this is * disabled, since it allows reading from or writing to * files not specified on the command line. */ if (!ISSET(RESTRICTED) && !exiting && openfile->mark_set) retval = write_marked_file(answer, NULL, FALSE, append); else #endif retval = write_file(answer, NULL, FALSE, append, FALSE); break; } } free(ans); return retval; } /* Write the current file to disk. If the mark is on, write the current * marked selection to disk. */ void do_writeout_void(void) { do_writeout(FALSE); display_main_list(); } /* Return a malloc()ed string containing the actual directory, used to * convert ~user/ and ~/ notation. */ char *real_dir_from_tilde(const char *buf) { char *dirtmp = NULL; assert(buf != NULL); if (buf[0] == '~') { size_t i; const char *tilde_dir; /* Figure out how much of the str we need to compare. */ for (i = 1; buf[i] != '/' && buf[i] != '\0'; i++) ; /* Get the home directory. */ if (i == 1) { get_homedir(); tilde_dir = homedir; } else { const struct passwd *userdata; do { userdata = getpwent(); } while (userdata != NULL && strncmp(userdata->pw_name, buf + 1, i - 1) != 0); endpwent(); tilde_dir = userdata->pw_dir; } if (tilde_dir != NULL) { dirtmp = charalloc(strlen(tilde_dir) + strlen(buf + i) + 1); sprintf(dirtmp, "%s%s", tilde_dir, buf + i); } } /* Set a default value for dirtmp, in case the user's home directory * isn't found. */ if (dirtmp == NULL) dirtmp = mallocstrcpy(NULL, buf); return dirtmp; } #if !defined(DISABLE_TABCOMP) || !defined(DISABLE_BROWSER) /* Our sort routine for file listings. Sort alphabetically and * case-insensitively, and sort directories before filenames. */ int diralphasort(const void *va, const void *vb) { struct stat fileinfo; const char *a = *(const char *const *)va; const char *b = *(const char *const *)vb; bool aisdir = stat(a, &fileinfo) != -1 && S_ISDIR(fileinfo.st_mode); bool bisdir = stat(b, &fileinfo) != -1 && S_ISDIR(fileinfo.st_mode); if (aisdir && !bisdir) return -1; if (!aisdir && bisdir) return 1; /* Standard function brain damage: We should be sorting * alphabetically and case-insensitively according to the current * locale, but there's no standard strcasecoll() function, so we * have to use multibyte strcasecmp() instead, */ return mbstrcasecmp(a, b); } /* Free the memory allocated for array, which should contain len * elements. */ void free_chararray(char **array, size_t len) { assert(array != NULL); for (; len > 0; len--) free(array[len - 1]); free(array); } #endif #ifndef DISABLE_TABCOMP /* Is the given file a directory? */ int is_dir(const char *buf) { char *dirptr = real_dir_from_tilde(buf); struct stat fileinfo; int retval = (stat(dirptr, &fileinfo) != -1 && S_ISDIR(fileinfo.st_mode)); assert(buf != NULL && dirptr != buf); free(dirptr); return retval; } /* These functions, username_tab_completion(), cwd_tab_completion() * (originally exe_n_cwd_tab_completion()), and input_tab(), were * adapted from busybox 0.46 (cmdedit.c). Here is the notice from that * file: * * Termios command line History and Editting, originally * intended for NetBSD sh (ash) * Copyright (c) 1999 * Main code: Adam Rogoyski * Etc: Dave Cinege * Majorly adjusted/re-written for busybox: * Erik Andersen * * You may use this code as you wish, so long as the original author(s) * are attributed in any redistributions of the source code. * This code is 'as is' with no warranty. * This code may safely be consumed by a BSD or GPL license. */ /* We consider the first buflen characters of buf for ~username tab * completion. */ char **username_tab_completion(const char *buf, size_t *num_matches, size_t buflen) { char **matches = NULL; const struct passwd *userdata; assert(buf != NULL && num_matches != NULL && buflen > 0); *num_matches = 0; while ((userdata = getpwent()) != NULL) { if (strncmp(userdata->pw_name, buf + 1, buflen - 1) == 0) { /* Cool, found a match. Add it to the list. This makes a * lot more sense to me (Chris) this way... */ #ifndef DISABLE_OPERATINGDIR /* ...unless the match exists outside the operating * directory, in which case just go to the next match. */ if (check_operating_dir(userdata->pw_dir, TRUE)) continue; #endif matches = (char **)nrealloc(matches, (*num_matches + 1) * sizeof(char *)); matches[*num_matches] = charalloc(strlen(userdata->pw_name) + 2); sprintf(matches[*num_matches], "~%s", userdata->pw_name); ++(*num_matches); } } endpwent(); return matches; } /* We consider the first buflen characters of buf for filename tab * completion. */ char **cwd_tab_completion(const char *buf, bool allow_files, size_t *num_matches, size_t buflen) { char *dirname = mallocstrcpy(NULL, buf), *filename; #ifndef DISABLE_OPERATINGDIR size_t dirnamelen; #endif size_t filenamelen; char **matches = NULL; DIR *dir; const struct dirent *nextdir; assert(dirname != NULL && num_matches != NULL && buflen >= 0); *num_matches = 0; null_at(&dirname, buflen); /* Okie, if there's a / in the buffer, strip out the directory * part. */ filename = strrchr(dirname, '/'); if (filename != NULL) { char *tmpdirname = filename + 1; filename = mallocstrcpy(NULL, tmpdirname); *tmpdirname = '\0'; tmpdirname = dirname; dirname = real_dir_from_tilde(dirname); free(tmpdirname); } else { filename = dirname; dirname = mallocstrcpy(NULL, "./"); } assert(dirname[strlen(dirname) - 1] == '/'); dir = opendir(dirname); if (dir == NULL) { /* Don't print an error, just shut up and return. */ beep(); free(filename); free(dirname); return NULL; } #ifndef DISABLE_OPERATINGDIR dirnamelen = strlen(dirname); #endif filenamelen = strlen(filename); while ((nextdir = readdir(dir)) != NULL) { bool skip_match = FALSE; #ifdef DEBUG fprintf(stderr, "Comparing \'%s\'\n", nextdir->d_name); #endif /* See if this matches. */ if (strncmp(nextdir->d_name, filename, filenamelen) == 0 && (*filename == '.' || (strcmp(nextdir->d_name, ".") != 0 && strcmp(nextdir->d_name, "..") != 0))) { /* Cool, found a match. Add it to the list. This makes a * lot more sense to me (Chris) this way... */ char *tmp = charalloc(strlen(dirname) + strlen(nextdir->d_name) + 1); sprintf(tmp, "%s%s", dirname, nextdir->d_name); #ifndef DISABLE_OPERATINGDIR /* ...unless the match exists outside the operating * directory, in which case just go to the next match. */ if (check_operating_dir(tmp, TRUE)) skip_match = TRUE; #endif /* ...or unless the match isn't a directory and allow_files * isn't set, in which case just go to the next match. */ if (!allow_files && !is_dir(tmp)) skip_match = TRUE; free(tmp); if (skip_match) continue; matches = (char **)nrealloc(matches, (*num_matches + 1) * sizeof(char *)); matches[*num_matches] = mallocstrcpy(NULL, nextdir->d_name); ++(*num_matches); } } closedir(dir); free(dirname); free(filename); return matches; } /* Do tab completion. place refers to how much the statusbar cursor * position should be advanced. refresh_func is the function we will * call to refresh the edit window. */ char *input_tab(char *buf, bool allow_files, size_t *place, bool *lastwastab, void (*refresh_func)(void), bool *list) { size_t num_matches = 0; char **matches = NULL; assert(buf != NULL && place != NULL && *place <= strlen(buf) && lastwastab != NULL && refresh_func != NULL && list != NULL); *list = FALSE; /* If the word starts with `~' and there is no slash in the word, * then try completing this word as a username. */ if (*place > 0 && *buf == '~') { const char *bob = strchr(buf, '/'); if (bob == NULL || bob >= buf + *place) matches = username_tab_completion(buf, &num_matches, *place); } /* Match against files relative to the current working directory. */ if (matches == NULL) matches = cwd_tab_completion(buf, allow_files, &num_matches, *place); if (num_matches <= 0) beep(); else { size_t match, common_len = 0; char *mzero; const char *lastslash = revstrstr(buf, "/", buf + *place); size_t lastslash_len = (lastslash == NULL) ? 0 : lastslash - buf + 1; char *match1_mb = charalloc(mb_cur_max() + 1); char *match2_mb = charalloc(mb_cur_max() + 1); int match1_mb_len, match2_mb_len; while (TRUE) { for (match = 1; match < num_matches; match++) { /* Get the number of single-byte characters that all the * matches have in common. */ match1_mb_len = parse_mbchar(matches[0] + common_len, match1_mb, NULL); match2_mb_len = parse_mbchar(matches[match] + common_len, match2_mb, NULL); match1_mb[match1_mb_len] = '\0'; match2_mb[match2_mb_len] = '\0'; if (strcmp(match1_mb, match2_mb) != 0) break; } if (match < num_matches || matches[0][common_len] == '\0') break; common_len += parse_mbchar(buf + common_len, NULL, NULL); } free(match1_mb); free(match2_mb); mzero = charalloc(lastslash_len + common_len + 1); strncpy(mzero, buf, lastslash_len); strncpy(mzero + lastslash_len, matches[0], common_len); common_len += lastslash_len; mzero[common_len] = '\0'; assert(common_len >= *place); if (num_matches == 1 && is_dir(mzero)) { mzero[common_len++] = '/'; assert(common_len > *place); } if (num_matches > 1 && (common_len != *place || !*lastwastab)) beep(); /* If there is more of a match to display on the statusbar, show * it. We reset lastwastab to FALSE: it requires pressing Tab * twice in succession with no statusbar changes to see a match * list. */ if (common_len != *place) { size_t buf_len = strlen(buf); *lastwastab = FALSE; buf = charealloc(buf, common_len + buf_len - *place + 1); charmove(buf + common_len, buf + *place, buf_len - *place + 1); strncpy(buf, mzero, common_len); *place = common_len; } else if (!*lastwastab || num_matches < 2) *lastwastab = TRUE; else { int longest_name = 0, columns, editline = 0; /* Now we show a list of the available choices. */ assert(num_matches > 1); /* Sort the list. */ qsort(matches, num_matches, sizeof(char *), diralphasort); for (match = 0; match < num_matches; match++) { common_len = strnlenpt(matches[match], COLS - 1); if (common_len > COLS - 1) { longest_name = COLS - 1; break; } if (common_len > longest_name) longest_name = common_len; } assert(longest_name <= COLS - 1); /* Each column will be (longest_name + 2) columns wide, i.e. * two spaces between columns, except that there will be * only one space after the last column. */ columns = (COLS + 1) / (longest_name + 2); /* Blank the edit window, and print the matches out * there. */ blank_edit(); wmove(edit, 0, 0); /* Disable el cursor. */ curs_set(0); for (match = 0; match < num_matches; match++) { char *disp; wmove(edit, editline, (longest_name + 2) * (match % columns)); if (match % columns == 0 && editline == editwinrows - 1 && num_matches - match > columns) { waddstr(edit, _("(more)")); break; } disp = display_string(matches[match], 0, longest_name, FALSE); waddstr(edit, disp); free(disp); if ((match + 1) % columns == 0) editline++; } wnoutrefresh(edit); *list = TRUE; } free(mzero); } free_chararray(matches, num_matches); /* Only refresh the edit window if we don't have a list of filename * matches on it. */ if (!*list) refresh_func(); /* Enable el cursor. */ curs_set(1); return buf; } #endif /* !DISABLE_TABCOMP */ /* Only print the last part of a path. Isn't there a shell command for * this? */ const char *tail(const char *foo) { const char *tmp = strrchr(foo, '/'); if (tmp == NULL) tmp = foo; else if (*tmp == '/') tmp++; return tmp; } #if !defined(NANO_TINY) && defined(ENABLE_NANORC) /* Return $HOME/.nano_history, or NULL if we can't find the homedir. * The string is dynamically allocated, and should be freed. */ char *histfilename(void) { char *nanohist = NULL; if (homedir != NULL) { size_t homelen = strlen(homedir); nanohist = charalloc(homelen + 15); strcpy(nanohist, homedir); strcpy(nanohist + homelen, "/.nano_history"); } return nanohist; } /* Load histories from ~/.nano_history. */ void load_history(void) { char *nanohist = histfilename(); /* Assume do_rcfile() has reported a missing home directory. */ if (nanohist != NULL) { FILE *hist = fopen(nanohist, "rb"); if (hist == NULL) { if (errno != ENOENT) { /* Don't save history when we quit. */ UNSET(HISTORYLOG); rcfile_error(N_("Error reading %s: %s"), nanohist, strerror(errno)); fprintf(stderr, _("\nPress Enter to continue starting nano.\n")); while (getchar() != '\n') ; } } else { /* Load a history (first the search history, then the * replace history) from oldest to newest. Assume the last * history entry is a blank line. */ filestruct **history = &search_history; char *line = NULL; size_t buflen = 0; ssize_t read; while ((read = getline(&line, &buflen, hist)) >= 0) { if (read > 0 && line[read - 1] == '\n') { read--; line[read] = '\0'; } if (read > 0) { unsunder(line, read); update_history(history, line); } else history = &replace_history; } fclose(hist); free(line); } free(nanohist); } } /* Write the lines of a history list, starting with the line at h, to * the open file at hist. Return TRUE if the write succeeded, and FALSE * otherwise. */ bool writehist(FILE *hist, filestruct *h) { filestruct *p; /* Write history from oldest to newest. Assume the last history * entry is a blank line. */ for (p = h; p != NULL; p = p->next) { size_t p_len = strlen(p->data); sunder(p->data); if (fwrite(p->data, sizeof(char), p_len, hist) < p_len || putc('\n', hist) == EOF) return FALSE; } return TRUE; } /* Save histories to ~/.nano_history. */ void save_history(void) { char *nanohist; /* Don't save unchanged or empty histories. */ if (!history_has_changed() || (searchbot->lineno == 1 && replacebot->lineno == 1)) return; nanohist = histfilename(); if (nanohist != NULL) { FILE *hist = fopen(nanohist, "wb"); if (hist == NULL) rcfile_error(N_("Error writing %s: %s"), nanohist, strerror(errno)); else { /* Make sure no one else can read from or write to the * history file. */ chmod(nanohist, S_IRUSR | S_IWUSR); if (!writehist(hist, searchage) || !writehist(hist, replaceage)) rcfile_error(N_("Error writing %s: %s"), nanohist, strerror(errno)); fclose(hist); } free(nanohist); } } #endif /* !NANO_TINY && ENABLE_NANORC */