/* $Id$ */
/**************************************************************************
* files.c *
* *
* Copyright (C) 1999-2005 Chris Allegretta *
* 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., 675 Mass Ave, Cambridge, MA 02139, USA. *
* *
**************************************************************************/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/wait.h>
#include <utime.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
#include <pwd.h>
#include <assert.h>
#include "proto.h"
static file_format fmt = NIX_FILE;
/* The format of the current file. */
/* What happens when there is no file to open? aiee! */
void new_file(void)
{
fileage = make_new_node(NULL);
fileage->data = mallocstrcpy(NULL, "");
filebot = fileage;
edittop = fileage;
current = fileage;
current_x = 0;
totlines = 1;
totsize = 0;
#ifdef ENABLE_COLOR
update_color();
if (!ISSET(NO_COLOR_SYNTAX))
edit_refresh();
#endif
}
/* We make a new line of text from buf. buf is length len. If
* first_line_ins is TRUE, then we put the new line at the top of the
* file. Otherwise, we assume prev is the last line of the file, and
* put our line after prev. */
filestruct *read_line(char *buf, filestruct *prev, bool *first_line_ins,
size_t len)
{
filestruct *fileptr = (filestruct *)nmalloc(sizeof(filestruct));
/* Convert nulls to newlines. len is the string's real length
* here. */
unsunder(buf, len);
assert(strlen(buf) == len);
fileptr->data = mallocstrcpy(NULL, buf);
#ifndef NANO_SMALL
/* If it's a DOS file (CR LF), and file conversion isn't disabled,
* strip out the CR part. */
if (!ISSET(NO_CONVERT) && len > 0 && buf[len - 1] == '\r')
fileptr->data[len - 1] = '\0';
#endif
if (*first_line_ins || fileage == NULL) {
/* Special case: we're inserting with the cursor on the first
* line. */
fileptr->prev = NULL;
fileptr->next = fileage;
fileptr->lineno = 1;
if (*first_line_ins == TRUE) {
*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. */
edittop = fileptr;
} else
filebot = fileptr;
fileage = fileptr;
} else {
assert(prev != NULL);
fileptr->prev = prev;
fileptr->next = NULL;
fileptr->lineno = prev->lineno + 1;
prev->next = fileptr;
}
return fileptr;
}
/* Load a file into the edit buffer. This takes data from the file
* struct. */
void load_file(void)
{
current = fileage;
#ifdef ENABLE_MULTIBUFFER
/* Add a new entry to the open_files structure. */
add_open_file(FALSE);
/* Reinitialize the shortcut list. */
shortcut_init(FALSE);
#endif
}
void read_file(FILE *f, const char *filename)
{
size_t num_lines = 0;
/* The number of lines in the file. */
size_t num_chars;
/* The number of characters 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 = 128;
/* 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 = 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_SMALL
int format = 0;
/* 0 = *nix, 1 = DOS, 2 = Mac, 3 = both DOS and Mac. */
#endif
buf = charalloc(bufx);
buf[0] = '\0';
if (current != NULL) {
if (current == fileage)
first_line_ins = TRUE;
else
fileptr = current->prev;
}
/* For the assertion in read_line(), it must be true that if current
* is NULL, then so is fileage. */
assert(current != NULL || fileage == NULL);
#ifndef NANO_SMALL
/* We don't know which file format we have yet, so assume it's a
* *nix file for now. */
fmt = NIX_FILE;
#endif
/* Read the entire file into the file struct. */
while ((input_int = getc(f)) != EOF) {
input = (char)input_int;
/* If it's a *nix file (LF) or a DOS file (CR LF), and file
* conversion isn't disabled, handle it! */
if (input == '\n') {
#ifndef NANO_SMALL
/* If there's a CR before the LF, 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_SMALL
/* If it's a Mac file (CR without an LF), 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 128 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 += 128;
buf = charealloc(buf, bufx);
}
buf[i] = input;
buf[i + 1] = '\0';
i++;
}
}
/* This conditional duplicates previous read_byte() behavior.
* Perhaps this could use some better handling. */
if (ferror(f))
nperror(filename);
fclose(f);
#ifndef NANO_SMALL
/* If file conversion isn't disabled and the last character in this
* file is a CR, 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_SMALL
/* If file conversion isn't disabled and the last character in
* this file is a CR, 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, make a new
* file. */
if (fileptr == NULL)
new_file();
/* Did we try to insert a file of 0 bytes? */
if (num_lines != 0) {
if (current != NULL) {
fileptr->next = current;
current->prev = fileptr;
renumber(current);
current_x = 0;
placewewant = 0;
} else if (fileptr->next == NULL) {
filebot = fileptr;
new_magicline();
totsize--;
}
}
get_totals(fileage, filebot, NULL, &num_chars);
totsize += num_chars;
#ifndef NANO_SMALL
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) {
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) {
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);
totlines += 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)
{
int fd;
struct stat fileinfo;
assert(f != NULL);
if (filename == NULL || filename[0] == '\0' ||
stat(filename, &fileinfo) == -1) {
if (newfie) {
statusbar(_("New File"));
return -2;
}
statusbar(_("\"%s\" not found"), filename);
return -1;
} else if (S_ISDIR(fileinfo.st_mode) || S_ISCHR(fileinfo.st_mode) ||
S_ISBLK(fileinfo.st_mode)) {
/* Don't open character or block files. Sorry, /dev/sndstat! */
statusbar(S_ISDIR(fileinfo.st_mode) ? _("\"%s\" is a directory")
: _("File \"%s\" is a device file"), filename);
return -1;
} else if ((fd = open(filename, O_RDONLY)) == -1) {
statusbar(_("Error reading %s: %s"), filename, strerror(errno));
return -1;
} else {
/* File is A-OK. Open it in binary mode for our own end-of-line
* character munging. */
*f = fdopen(fd, "rb");
if (*f == NULL) {
statusbar(_("Error reading %s: %s"), filename,
strerror(errno));
close(fd);
} else
statusbar(_("Reading File"));
}
return 0;
}
/* This function will return the name of the first available extension
* of a filename (starting with filename.save, then filename.save.1,
* etc.). Memory is allocated for the return value. If no writable
* extension exists, we return "". */
char *get_next_filename(const char *name)
{
long i = 0;
char *buf;
size_t namelen = strlen(name);
buf = charalloc(namelen + num_of_digits(LONG_MAX) + 7);
strcpy(buf, name);
strcpy(buf + namelen, ".save");
namelen += 5;
while (TRUE) {
struct stat fs;
if (stat(buf, &fs) == -1)
return buf;
if (i == LONG_MAX)
break;
i++;
sprintf(buf + namelen, ".%ld", i);
}
/* We get here only if there is no possible save file. */
null_at(&buf, 0);
return buf;
}
#ifndef NANO_SMALL
void execute_command(const char *command)
{
#ifdef ENABLE_MULTIBUFFER
if (ISSET(MULTIBUFFER)) {
/* Update the current entry in the open_files structure. */
add_open_file(TRUE);
new_file();
UNSET(MODIFIED);
UNSET(MARK_ISSET);
}
#endif /* ENABLE_MULTIBUFFER */
open_pipe(command);
#ifdef ENABLE_MULTIBUFFER
/* Add this new entry to the open_files structure. */
if (ISSET(MULTIBUFFER))
load_file();
#endif /* ENABLE_MULTIBUFFER */
}
#endif /* !NANO_SMALL */
/* name is a file name to open. We make a new buffer if necessary, then
* open and read the file. */
void load_buffer(const char *name)
{
bool new_buffer = (fileage == NULL
#ifdef ENABLE_MULTIBUFFER
|| ISSET(MULTIBUFFER)
#endif
);
/* new_buffer says whether we load into this buffer or a new
* one. If new_buffer is TRUE, we display "New File" if the
* file is not found, and if it is found we set filename and add
* a new open_files entry. */
FILE *f;
int rc;
/* rc == -2 means that the statusbar displayed "New File". -1
* means that the open failed. 0 means success. */
#ifndef DISABLE_OPERATINGDIR
if (check_operating_dir(name, FALSE)) {
statusbar(_("Can't insert file from outside of %s"),
operating_dir);
return;
}
#endif
#ifdef ENABLE_MULTIBUFFER
/* Update the current entry in the open_files structure. */
add_open_file(TRUE);
#endif
rc = open_file(name, new_buffer, &f);
#ifdef ENABLE_MULTIBUFFER
if (rc != -1 && ISSET(MULTIBUFFER)) {
UNSET(MODIFIED);
#ifndef NANO_SMALL
UNSET(MARK_ISSET);
#endif
}
#endif
if (rc != -1 && new_buffer) {
filename = mallocstrcpy(filename, name);
new_file();
}
if (rc == 0) {
file_format fmt_save = fmt;
read_file(f, filename);
/* If we're not loading into a new buffer, preserve the file
* format. */
if (!new_buffer)
fmt = fmt_save;
#ifndef NANO_SMALL
stat(filename, &originalfilestat);
#endif
}
/* Add this new entry to the open_files structure if we have
* multibuffer support, or to the main filestruct if we don't. */
if (rc != -1 && new_buffer)
load_file();
}
void do_insertfile(
#ifndef NANO_SMALL
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 = edittop;
int current_y_save = current_y;
bool at_edittop = FALSE;
/* Whether we're at the top of the edit window. */
#ifndef DISABLE_WRAPPING
wrap_reset();
#endif
while (TRUE) {
#ifndef NANO_SMALL
if (execute) {
#ifdef ENABLE_MULTIBUFFER
if (ISSET(MULTIBUFFER))
msg = N_("Command to execute in new buffer [from %s] ");
else
#endif
msg = N_("Command to execute [from %s] ");
} else {
#endif
#ifdef ENABLE_MULTIBUFFER
if (ISSET(MULTIBUFFER)) {
msg = N_("File to insert into new buffer [from %s] ");
} else
#endif
msg = N_("File to insert [from %s] ");
#ifndef NANO_SMALL
}
#endif
i = statusq(TRUE,
#ifndef NANO_SMALL
execute ? extcmd_list :
#endif
insertfile_list, ans,
#ifndef NANO_SMALL
NULL,
#endif
_(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 = placewewant;
ans = mallocstrcpy(ans, answer);
#if !defined(NANO_SMALL) && defined(ENABLE_MULTIBUFFER)
if (i == TOGGLE_MULTIBUFFER_KEY) {
/* Don't allow toggling if we're in view mode. */
if (!ISSET(VIEW_MODE))
TOGGLE(MULTIBUFFER);
continue;
}
#endif
#ifndef DISABLE_BROWSER
if (i == NANO_TOFILES_KEY) {
char *tmp = do_browse_from(answer);
if (tmp == NULL)
continue;
free(answer);
answer = tmp;
/* We have a file now. Get out of the statusbar prompt
* cleanly. */
statusq_abort();
}
#endif
#ifndef NANO_SMALL
if (i == NANO_TOOTHERINSERT_KEY) {
execute = !execute;
continue;
}
#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(current, current_x,
current, current_x);
at_edittop = (fileage == edittop);
#ifdef ENABLE_MULTIBUFFER
}
#endif
#ifndef NANO_SMALL
if (execute)
execute_command(answer);
else {
#endif
answer = mallocstrassn(answer, real_dir_from_tilde(answer));
load_buffer(answer);
#ifndef NANO_SMALL
}
#endif
#ifdef ENABLE_MULTIBUFFER
if (!ISSET(MULTIBUFFER))
#endif
{
filestruct *top_save = fileage;
/* If we didn't insert into a new buffer, and we were at
* the top of the edit window before, set the saved
* value of edittop to the new top of the edit window,
* and update the current y-coordinate to account for
* the number of lines inserted. */
if (at_edittop)
edittop_save = fileage;
current_y += current_y_save;
/* If we didn't insert into a new buffer, 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);
/* Set edittop back to what it was before. */
edittop = edittop_save;
}
#ifdef ENABLE_MULTIBUFFER
if (ISSET(MULTIBUFFER)) {
/* Update the titlebar. */
titlebar(NULL);
/* Reinitialize the shortcut list. */
shortcut_init(FALSE);
} else {
#endif
/* Mark the file as modified. */
set_modified();
/* Restore the old place we want. */
placewewant = pww_save;
#ifdef ENABLE_MULTIBUFFER
}
#endif
/* Refresh the screen. */
edit_refresh();
break;
}
}
free(ans);
}
void do_insertfile_void(void)
{
#ifdef ENABLE_MULTIBUFFER
if (ISSET(VIEW_MODE) && !ISSET(MULTIBUFFER))
statusbar(_("Key illegal in non-multibuffer mode"));
else
#endif
do_insertfile(
#ifndef NANO_SMALL
FALSE
#endif
);
display_main_list();
}
#ifdef ENABLE_MULTIBUFFER
/* Create a new openfilestruct node. */
openfilestruct *make_new_opennode(void)
{
openfilestruct *newnode =
(openfilestruct *)nmalloc(sizeof(openfilestruct));
newnode->filename = 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);
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
/* Add/update an entry to the open_files openfilestruct. If update is
* FALSE, a new entry is created; otherwise, the current entry is
* updated. */
void add_open_file(bool update)
{
if (open_files == NULL && update)
return;
/* If there are no entries in open_files, make the first one. */
if (open_files == NULL) {
open_files = make_new_opennode();
splice_opennode(open_files, open_files, open_files);
/* Otherwise, if we're not updating, make a new entry for
* open_files and splice it in after the current entry. */
} else if (!update) {
splice_opennode(open_files, make_new_opennode(),
open_files->next);
open_files = open_files->next;
}
/* Save the current filename. */
open_files->filename = mallocstrcpy(open_files->filename, filename);
#ifndef NANO_SMALL
/* Save the current file's stat. */
open_files->originalfilestat = originalfilestat;
#endif
/* Save the current file buffer. */
open_files->fileage = fileage;
open_files->filebot = filebot;
/* Save the current top of the edit window. */
open_files->edittop = edittop;
/* Save the current line. */
open_files->current = current;
/* Save the current cursor position. */
open_files->current_x = current_x;
/* Save the current place we want. */
open_files->placewewant = placewewant;
/* Save the current total number of lines. */
open_files->totlines = totlines;
/* Save the current total size. */
open_files->totsize = totsize;
/* Start with no flags saved. */
open_files->flags = 0;
/* Save the current modification status. */
if (ISSET(MODIFIED))
open_files->flags |= MODIFIED;
#ifndef NANO_SMALL
/* Save the current marking status and mark, if applicable. */
if (ISSET(MARK_ISSET)) {
open_files->flags |= MARK_ISSET;
open_files->mark_beginbuf = mark_beginbuf;
open_files->mark_beginx = mark_beginx;
}
/* Save the current file format. */
open_files->fmt = fmt;
#endif
#ifdef DEBUG
fprintf(stderr, "filename is %s\n", open_files->filename);
#endif
}
/* Read the current entry in the open_files structure and set up the
* currently open file buffer using that entry's information. */
void load_open_file(void)
{
assert(open_files != NULL);
/* Restore the current filename. */
filename = mallocstrcpy(filename, open_files->filename);
#ifndef NANO_SMALL
/* Restore the current file's stat. */
originalfilestat = open_files->originalfilestat;
#endif
/* Restore the current file buffer. */
fileage = open_files->fileage;
filebot = open_files->filebot;
/* Restore the current top of the edit window. */
edittop = open_files->edittop;
/* Restore the current line. */
current = open_files->current;
/* Restore the current cursor position. */
current_x = open_files->current_x;
/* Restore the current place we want. */
placewewant = open_files->placewewant;
/* Restore the current total number of lines. */
totlines = open_files->totlines;
/* Restore the current total size. */
totsize = open_files->totsize;
/* Restore the current modification status. */
if (open_files->flags & MODIFIED)
SET(MODIFIED);
else
UNSET(MODIFIED);
#ifndef NANO_SMALL
/* Restore the current marking status and mark, if applicable. */
if (open_files->flags & MARK_ISSET) {
mark_beginbuf = open_files->mark_beginbuf;
mark_beginx = open_files->mark_beginx;
SET(MARK_ISSET);
} else
UNSET(MARK_ISSET);
/* Restore the current file format. */
fmt = open_files->fmt;
#endif
#ifdef ENABLE_COLOR
update_color();
#endif
edit_refresh();
/* Update the titlebar. */
clearok(topwin, FALSE);
titlebar(NULL);
}
/* Open either the next or previous file buffer. */
void open_prevnext_file(bool next)
{
add_open_file(TRUE);
assert(open_files != NULL);
/* If only one file buffer is open, indicate it on the statusbar and
* get out. */
if (open_files == open_files->next) {
statusbar(_("No more open file buffers"));
return;
}
/* Switch to the next or previous file, depending on the value of
* next. */
open_files = next ? open_files->next : open_files->prev;
#ifdef DEBUG
fprintf(stderr, "filename is %s\n", open_files->filename);
#endif
/* Load the file we switched to. */
load_open_file();
/* And indicate the switch on the statusbar. */
statusbar(_("Switched to %s"),
((open_files->filename[0] == '\0') ? _("New Buffer") :
open_files->filename));
#ifdef DEBUG
dump_buffer(current);
#endif
}
/* Open the previous entry in the open_files structure. This function
* is used by the shortcut list. */
void open_prevfile_void(void)
{
open_prevnext_file(FALSE);
}
/* Open the next entry in the open_files structure. This function is
* used by the shortcut list. */
void open_nextfile_void(void)
{
open_prevnext_file(TRUE);
}
/* Delete an entry from the open_files filestruct. After deletion of an
* entry, the next entry is opened. Return TRUE on success or FALSE if
* there are no more open file buffers. */
bool close_open_file(void)
{
assert(open_files != NULL);
/* If only one file is open, get out. */
if (open_files == open_files->next)
return FALSE;
/* Open the next file. */
open_nextfile_void();
/* Close the file we had open before. */
unlink_opennode(open_files->prev);
/* Reinitialize the shortcut list. */
shortcut_init(FALSE);
display_main_list();
return TRUE;
}
#endif /* ENABLE_MULTIBUFFER */
#if !defined(DISABLE_SPELLER) || !defined(DISABLE_OPERATINGDIR)
/* 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)
{
char *d_here, *d_there = NULL;
if (origpath == NULL)
return NULL;
/* Get the current directory. */
d_here = charalloc(PATH_MAX + 1);
d_here = getcwd(d_here, PATH_MAX + 1);
if (d_here != NULL) {
const char *last_slash;
char *d_there_file = NULL;
bool path_only;
struct stat fileinfo;
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, "/");
}
d_there = real_dir_from_tilde(origpath);
assert(d_there != NULL);
/* Stat d_there. If stat() 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 if
* d_there refers to a file. */
path_only = !stat(d_there, &fileinfo) &&
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);
/* And 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 {
/* Get the full path and save it in d_there. */
free(d_there);
d_there = charalloc(PATH_MAX + 1);
d_there = getcwd(d_there, PATH_MAX + 1);
if (d_there != NULL) {
align(&d_there);
if (strcmp(d_there, "/") != 0) {
/* Make sure d_there ends in a slash. */
d_there = charealloc(d_there,
strlen(d_there) + 2);
strcat(d_there, "/");
}
} else
/* If we couldn't get the full path, 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. */
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 exists,
* 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 d_there_file onto the end of
* d_there, so that d_there contains 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. */
free(d_there_file);
}
return d_there;
}
#endif /* !DISABLE_SPELLER || !DISABLE_OPERATINGDIR */
#ifndef DISABLE_SPELLER
/* 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 acts like a call to tempnam(NULL, "nano."). The
* difference is that the number of calls is not limited by TMP_MAX.
* Instead we use mkstemp(). */
char *safe_tempnam(void)
{
char *full_tempdir = NULL;
const char *TMPDIR_env;
int filedesc;
/* If $TMPDIR is set and non-empty, 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 && TMPDIR_env[0] != '\0')
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");
filedesc = mkstemp(full_tempdir);
/* If mkstemp() succeeded, close the resulting file, delete it
* (since it'll be 0 bytes long), and return the filename. */
if (filedesc != -1) {
close(filedesc);
unlink(full_tempdir);
return full_tempdir;
}
free(full_tempdir);
return NULL;
}
#endif /* !DISABLE_SPELLER */
#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)
{
/* The char *full_operating_dir is global for mem 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);
/* fullpath == NULL 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_SMALL
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, -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 tmp is FALSE, we set the umask to disallow
* anyone else from accessing the file, we don't set the global variable
* 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 == 1 means we are appending instead of overwriting.
* append == 2 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 -1 on error, 1 on success. */
int write_file(const char *name, bool tmp, int 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 = 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(). 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;
/* 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 (!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);
/* New case: if the file exists, just give up. */
if (tmp && anyexists)
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 file at the end of the symlink (if there is
* one). */
realexists = (stat(realname, &st) != -1);
#ifndef NANO_SMALL
/* 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 != 0 || ISSET(MARK_ISSET) ||
originalfilestat.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 = originalfilestat.st_atime;
filetime.modtime = originalfilestat.st_mtime;
/* Open the original file to copy to the backup. */
f = fopen(realname, "rb");
if (f == NULL) {
statusbar(_("Error reading %s: %s"), realname,
strerror(errno));
goto cleanup_and_exit;
}
/* If backup_dir is set, we set backupname to
* backup_dir/backupname~, where backupnae 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~. */
if (backup_dir != NULL) {
char *canon_realname = get_full_path(realname);
size_t i;
if (canon_realname == 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~. */
canon_realname = mallocstrcpy(NULL, tail(realname));
else {
for (i = 0; canon_realname[i] != '\0'; i++) {
if (canon_realname[i] == '/')
canon_realname[i] = '!';
}
}
backupname = charalloc(strlen(backup_dir) +
strlen(canon_realname) + 2);
sprintf(backupname, "%s%s~", backup_dir, canon_realname);
free(canon_realname);
} 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, originalfilestat.st_mode) == -1) {
statusbar(_("Error writing %s: %s"), backupname,
strerror(errno));
free(backupname);
if (backup_file != NULL)
fclose(backup_file);
fclose(f);
goto cleanup_and_exit;
}
#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 metadata. */
if (copy_status != 0 || chown(backupname,
originalfilestat.st_uid,
originalfilestat.st_gid) == -1 || utime(backupname,
&filetime) == -1) {
free(backupname);
if (copy_status == -1)
statusbar(_("Error reading %s: %s"), realname,
strerror(errno));
else
statusbar(_("Error writing %s: %s"), backupname,
strerror(errno));
goto cleanup_and_exit;
}
free(backupname);
}
#endif /* !NANO_SMALL */
/* 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;
}
original_umask = umask(0);
umask(original_umask);
/* If we create a temp file, we don't let anyone else access it. We
* create a temp file if tmp is TRUE or if we're prepending. */
if (tmp || append == 2)
umask(S_IRWXG | S_IRWXO);
/* If we're prepending, copy the file to a temp file. */
if (append == 2) {
int fd_source;
FILE *f_source = NULL;
tempname = charalloc(strlen(realname) + 8);
strcpy(tempname, realname);
strcat(tempname, ".XXXXXX");
fd = mkstemp(tempname);
f = NULL;
if (fd != -1) {
f = fdopen(fd, "wb");
if (f == NULL)
close(fd);
}
if (f == NULL) {
statusbar(_("Error writing %s: %s"), tempname,
strerror(errno));
unlink(tempname);
goto cleanup_and_exit;
}
fd_source = open(realname, 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"), realname,
strerror(errno));
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;
}
}
/* Now open the file in place. Use O_EXCL if tmp is TRUE. This is
* now copied from joe, because wiggy says so *shrug*. */
fd = open(realname, O_WRONLY | O_CREAT |
((append == 1) ? 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);
/* First, just give up if we couldn't even open the file. */
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 == 1) ? "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(fileage != NULL && filebot != NULL);
while (fileptr != filebot) {
size_t data_len = strlen(fileptr->data);
size_t 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;
}
#ifndef NANO_SMALL
if (fmt == DOS_FILE || fmt == MAC_FILE) {
if (putc('\r', f) == EOF) {
statusbar(_("Error writing %s: %s"), realname,
strerror(errno));
fclose(f);
goto cleanup_and_exit;
}
}
if (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_SMALL
}
#endif
fileptr = fileptr->next;
lineswritten++;
}
/* If we're prepending, open the temp file, and append it to f. */
if (append == 2) {
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));
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 if (fclose(f) == EOF) {
statusbar(_("Error writing %s: %s"), realname, strerror(errno));
unlink(tempname);
goto cleanup_and_exit;
}
if (!tmp && append == 0) {
if (!nonamechange) {
filename = mallocstrcpy(filename, realname);
#ifdef ENABLE_COLOR
update_color();
if (!ISSET(NO_COLOR_SYNTAX))
edit_refresh();
#endif
}
#ifndef NANO_SMALL
/* Update originalfilestat to reference the file as it is now. */
stat(filename, &originalfilestat);
#endif
statusbar(P_("Wrote %u line", "Wrote %u lines", lineswritten),
lineswritten);
UNSET(MODIFIED);
titlebar(NULL);
}
retval = 1;
cleanup_and_exit:
free(realname);
free(tempname);
return retval;
}
#ifndef NANO_SMALL
/* Write a marked selection from a file out. First, set fileage and
* filebot as the top and bottom of the mark, respectively. Then call
* write_file() with the values of name, temp, and append, and with
* nonamechange set to TRUE so that we don't change the current
* filename. Finally, set fileage and filebot back to their old values
* and return. */
int write_marked(const char *name, bool tmp, int append)
{
int retval = -1;
bool old_modified = ISSET(MODIFIED);
/* write_file() unsets the MODIFIED flag. */
bool added_magicline;
/* Whether we added a magicline after filebot. */
filestruct *top, *bot;
size_t top_x, bot_x;
/* 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);
/* 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. */
added_magicline = (filebot->data[0] != '\0');
if (added_magicline)
new_magicline();
retval = write_file(name, tmp, append, TRUE);
/* If we added a magicline, remove it now. */
if (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_SMALL */
int do_writeout(bool exiting)
{
int i;
int retval = 0, append = 0;
char *ans;
/* The last answer the user typed on the statusbar. */
#ifdef NANO_EXTRA
static bool did_cred = FALSE;
#endif
currshortcut = writefile_list;
if (exiting && filename[0] != '\0' && ISSET(TEMP_FILE)) {
retval = write_file(filename, FALSE, 0, FALSE);
/* Write succeeded. */
if (retval == 1)
return retval;
}
#ifndef NANO_SMALL
if (ISSET(MARK_ISSET) && !exiting)
ans = mallocstrcpy(NULL, "");
else
#endif
ans = mallocstrcpy(NULL, filename);
while (TRUE) {
const char *msg;
#ifndef NANO_SMALL
const char *formatstr, *backupstr;
if (fmt == DOS_FILE)
formatstr = N_(" [DOS Format]");
else if (fmt == MAC_FILE)
formatstr = N_(" [Mac Format]");
else
formatstr = "";
if (ISSET(BACKUP_FILE))
backupstr = N_(" [Backup]");
else
backupstr = "";
/* Be nice to the translation folks. */
if (ISSET(MARK_ISSET) && !exiting) {
if (append == 2)
msg = N_("Prepend Selection to File");
else if (append == 1)
msg = N_("Append Selection to File");
else
msg = N_("Write Selection to File");
} else
#endif /* !NANO_SMALL */
if (append == 2)
msg = N_("File Name to Prepend to");
else if (append == 1)
msg = N_("File Name to Append to");
else
msg = N_("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 = statusq(!ISSET(RESTRICTED) || filename[0] == '\0',
writefile_list, ans,
#ifndef NANO_SMALL
NULL, "%s%s%s", _(msg), formatstr, backupstr
#else
"%s", _(msg)
#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);
currshortcut = writefile_list;
if (tmp == NULL)
continue;
free(answer);
answer = tmp;
/* We have a file now. Get out of the statusbar prompt
* cleanly. */
statusq_abort();
} else
#endif /* !DISABLE_BROWSER */
#ifndef NANO_SMALL
if (i == TOGGLE_DOS_KEY) {
fmt = (fmt == DOS_FILE) ? NIX_FILE : DOS_FILE;
continue;
} else if (i == TOGGLE_MAC_KEY) {
fmt = (fmt == MAC_FILE) ? NIX_FILE : MAC_FILE;
continue;
} else if (i == TOGGLE_BACKUP_KEY) {
TOGGLE(BACKUP_FILE);
continue;
} else
#endif /* !NANO_SMALL */
if (i == NANO_PREPEND_KEY) {
append = (append == 2) ? 0 : 2;
continue;
} else if (i == NANO_APPEND_KEY) {
append = (append == 1) ? 0 : 1;
continue;
}
#ifdef DEBUG
fprintf(stderr, "filename is %s\n", answer);
#endif
#ifdef NANO_EXTRA
if (exiting && !ISSET(TEMP_FILE) &&
strcasecmp(answer, "zzy") == 0 && !did_cred) {
do_credits();
did_cred = TRUE;
retval = -1;
break;
}
#endif
if (append == 0 && strcmp(answer, filename) != 0) {
struct stat st;
if (!stat(answer, &st)) {
i = do_yesno(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. In this case, don't
* bother showing the "Different Name" prompt. */
} else if (!ISSET(RESTRICTED) && filename[0] != '\0'
#ifndef NANO_SMALL
&& (exiting || !ISSET(MARK_ISSET))
#endif
) {
i = do_yesno(FALSE,
_("Save file under DIFFERENT NAME ? "));
if (i == 0 || i == -1)
continue;
}
}
#ifndef NANO_SMALL
/* 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 && ISSET(MARK_ISSET))
retval = write_marked(answer, FALSE, append);
else
#endif /* !NANO_SMALL */
retval = write_file(answer, FALSE, append, FALSE);
#ifdef ENABLE_MULTIBUFFER
/* If we're not about to exit, update the current entry in
* the open_files structure. */
if (!exiting)
add_open_file(TRUE);
#endif
break;
}
} /* while (TRUE) */
free(ans);
return retval;
}
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;
if (buf == NULL)
return 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;
return strcasecmp(a, b);
}
#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 ret = (stat(dirptr, &fileinfo) != -1 &&
S_ISDIR(fileinfo.st_mode));
assert(buf != NULL && dirptr != buf);
free(dirptr);
return ret;
}
/* These functions (username_tab_completion(), cwd_tab_completion(), and
* input_tab()) were taken 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 <rogoyski@cs.utexas.edu>
* Etc: Dave Cinege <dcinege@psychosis.com>
* Majorly adjusted/re-written for busybox:
* Erik Andersen <andersee@debian.org>
*
* 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;
}
/* This was originally called exe_n_cwd_tab_completion, but we're not
* worried about executables, only filenames :> */
char **cwd_tab_completion(const char *buf, size_t *num_matches, size_t
buflen)
{
char *dirname = mallocstrcpy(NULL, buf);
char *filename;
#ifndef DISABLE_OPERATINGDIR
size_t dirnamelen;
#endif
size_t filenamelen;
char **matches = NULL;
DIR *dir;
const struct dirent *next;
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 ((next = readdir(dir)) != NULL) {
#ifdef DEBUG
fprintf(stderr, "Comparing \'%s\'\n", next->d_name);
#endif
/* See if this matches. */
if (strncmp(next->d_name, filename, filenamelen) == 0 &&
(*filename == '.' || (strcmp(next->d_name, ".") != 0 &&
strcmp(next->d_name, "..") != 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. To
* properly do operating directory checking, we have to add
* the directory name to the beginning of the proposed match
* before we check it. */
char *tmp2 = charalloc(strlen(dirname) +
strlen(next->d_name) + 1);
sprintf(tmp2, "%s%s", dirname, next->d_name);
if (check_operating_dir(tmp2, TRUE)) {
free(tmp2);
continue;
}
free(tmp2);
#endif
matches = (char **)nrealloc(matches, (*num_matches + 1) *
sizeof(char *));
matches[*num_matches] = mallocstrcpy(NULL, next->d_name);
++(*num_matches);
}
}
closedir(dir);
free(dirname);
free(filename);
return matches;
}
/* Do tab completion. This function now has an arg which refers to how
* much the statusbar cursor position (place) should be advanced. */
char *input_tab(char *buf, size_t *place, bool *lastwastab, bool *list)
{
size_t num_matches = 0;
char **matches = NULL;
assert(buf != NULL && place != NULL && *place <= strlen(buf) && lastwastab != NULL && list != NULL);
*list = 0;
/* 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, &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;
while (TRUE) {
for (match = 1; match < num_matches; match++) {
if (matches[0][common_len] !=
matches[match][common_len])
break;
}
if (match < num_matches || matches[0][common_len] == '\0')
break;
common_len++;
}
mzero = charalloc(lastslash_len + common_len + 1);
sprintf(mzero, "%.*s%.*s", lastslash_len, buf, common_len,
matches[0]);
common_len += lastslash_len;
assert(common_len >= *place);
if (num_matches == 1 && is_dir(mzero)) {
mzero[common_len] = '/';
common_len++;
assert(common_len > *place);
}
if (num_matches > 1 && (common_len != *place ||
*lastwastab == FALSE))
beep();
/* If there is more match to display on the statusbar, show it.
* We reset lastwastab to FALSE: it requires hitting Tab twice
* in succession with no statusbar changes to see a match
* list. */
if (common_len != *place) {
size_t buflen = strlen(buf);
*lastwastab = FALSE;
buf = charealloc(buf, common_len + buflen - *place + 1);
charmove(buf + common_len, buf + *place, buflen - *place + 1);
strncpy(buf, mzero, common_len);
*place = common_len;
} else if (*lastwastab == FALSE || num_matches < 2)
*lastwastab = TRUE;
else {
int longest_name = 0, editline = 0;
size_t columns;
/* 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 characters 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++;
}
wrefresh(edit);
*list = TRUE;
}
free(mzero);
}
free_charptrarray(matches, num_matches);
/* Only refresh the edit window if we don't have a list of filename
* matches on it. */
if (*list == FALSE)
edit_refresh();
/* 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;
}
#ifndef DISABLE_BROWSER
/* Free our malloc()ed memory. */
void free_charptrarray(char **array, size_t len)
{
for (; len > 0; len--)
free(array[len - 1]);
free(array);
}
/* Strip one directory from the end of path. */
void striponedir(char *path)
{
char *tmp;
assert(path != NULL);
tmp = strrchr(path, '/');
if (tmp != NULL)
*tmp = '\0';
}
/* Return a list of files contained in the directory path. *longest is
* the maximum display length of a file, up to COLS - 1 (but at least
* 7). *numents is the number of files. We assume path exists and is a
* directory. If neither is true, we return NULL. */
char **browser_init(const char *path, int *longest, size_t *numents, DIR
*dir)
{
const struct dirent *next;
char **filelist;
size_t i, path_len;
assert(dir != NULL);
*longest = 0;
i = 0;
while ((next = readdir(dir)) != NULL) {
size_t dlen;
/* Don't show the . entry. */
if (strcmp(next->d_name, ".") == 0)
continue;
i++;
dlen = strlenpt(next->d_name);
if (dlen > *longest)
*longest = dlen;
}
*numents = i;
rewinddir(dir);
*longest += 10;
filelist = (char **)nmalloc(*numents * sizeof(char *));
path_len = strlen(path);
i = 0;
while ((next = readdir(dir)) != NULL && i < *numents) {
/* Don't show the "." entry. */
if (strcmp(next->d_name, ".") == 0)
continue;
filelist[i] = charalloc(path_len + strlen(next->d_name) + 1);
sprintf(filelist[i], "%s%s", path, next->d_name);
i++;
}
/* Maybe the number of files in the directory changed between the
* first time we scanned and the second. i is the actual length of
* filelist, so record it. */
*numents = i;
closedir(dir);
if (*longest > COLS - 1)
*longest = COLS - 1;
if (*longest < 7)
*longest = 7;
return filelist;
}
/* Our browser function. path is the path to start browsing from.
* Assume path has already been tilde-expanded. */
char *do_browser(char *path, DIR *dir)
{
int kbinput, longest, selected, width;
bool meta_key, func_key, old_constupdate = ISSET(CONSTUPDATE);
size_t numents;
char **filelist, *retval = NULL;
curs_set(0);
blank_statusbar();
bottombars(browser_list);
wrefresh(bottomwin);
#if !defined(DISABLE_HELP) || !defined(DISABLE_MOUSE)
/* Set currshortcut so the user can click in the shortcut area, and
* so the browser help screen will come up. */
currshortcut = browser_list;
#endif
UNSET(CONSTUPDATE);
change_browser_directory:
/* We go here after the user selects a new directory. */
kbinput = ERR;
selected = 0;
width = 0;
path = mallocstrassn(path, get_full_path(path));
/* Assume that path exists and ends with a slash. */
assert(path != NULL && path[strlen(path) - 1] == '/');
/* Get the list of files. */
filelist = browser_init(path, &longest, &numents, dir);
assert(filelist != NULL);
/* Sort the list. */
qsort(filelist, numents, sizeof(char *), diralphasort);
titlebar(path);
/* Loop invariant: Microsoft sucks. */
do {
bool abort = FALSE;
int j, col = 0, editline = 0, fileline;
int filecols = 0;
/* Used only if width == 0, to calculate the number of files
* per row below. */
struct stat st;
char *new_path;
/* Used by the Go To Directory prompt. */
#ifndef DISABLE_MOUSE
MEVENT mevent;
#endif
check_statusblank();
/* Compute the line number we're on now, so that we don't divide
* by zero later. */
fileline = selected;
if (width != 0)
fileline /= width;
switch (kbinput) {
#ifndef DISABLE_MOUSE
case KEY_MOUSE:
if (getmouse(&mevent) == ERR)
break;
/* If we clicked in the edit window, we probably clicked
* on a file. */
if (wenclose(edit, mevent.y, mevent.x)) {
int selectedbackup = selected;
mevent.y -= 2;
/* longest is the width of each column. There are
* two spaces between each column. */
selected = (fileline / editwinrows) * editwinrows *
width + mevent.y * width + mevent.x /
(longest + 2);
/* If they clicked beyond the end of a row, select
* the end of that row. */
if (mevent.x > width * (longest + 2))
selected--;
/* If we're off the screen, reset to the last item.
* If we clicked the same place as last time, select
* this name! */
if (selected > numents - 1)
selected = numents - 1;
else if (selectedbackup == selected)
/* Put back the 'select' key. */
unget_kbinput('s', FALSE, FALSE);
} else {
/* We must have clicked a shortcut. Put back the
* equivalent shortcut key. */
int mouse_x, mouse_y;
get_mouseinput(&mouse_x, &mouse_y, TRUE);
}
break;
#endif
case NANO_PREVLINE_KEY:
if (selected >= width)
selected -= width;
break;
case NANO_BACK_KEY:
if (selected > 0)
selected--;
break;
case NANO_NEXTLINE_KEY:
if (selected + width <= numents - 1)
selected += width;
break;
case NANO_FORWARD_KEY:
if (selected < numents - 1)
selected++;
break;
case NANO_PREVPAGE_KEY:
case NANO_PREVPAGE_FKEY:
case '-': /* Pico compatibility. */
if (selected >= (editwinrows + fileline % editwinrows) *
width)
selected -= (editwinrows + fileline % editwinrows) *
width;
else
selected = 0;
break;
case NANO_NEXTPAGE_KEY:
case NANO_NEXTPAGE_FKEY:
case ' ': /* Pico compatibility. */
selected += (editwinrows - fileline % editwinrows) *
width;
if (selected >= numents)
selected = numents - 1;
break;
case NANO_HELP_KEY:
case NANO_HELP_FKEY:
case '?': /* Pico compatibility. */
#ifndef DISABLE_HELP
do_help();
curs_set(0);
#else
nano_disabled_msg();
#endif
break;
case NANO_ENTER_KEY:
case 'S': /* Pico compatibility. */
case 's':
/* You can't move up from "/". */
if (strcmp(filelist[selected], "/..") == 0) {
statusbar(_("Can't move up a directory"));
beep();
break;
}
#ifndef DISABLE_OPERATINGDIR
/* Note: the selected file can be outside the operating
* directory if it's ".." or if it's a symlink to a
* directory outside the operating directory. */
if (check_operating_dir(filelist[selected], FALSE)) {
statusbar(
_("Can't go outside of %s in restricted mode"),
operating_dir);
beep();
break;
}
#endif
if (stat(filelist[selected], &st) == -1) {
statusbar(_("Error reading %s: %s"),
filelist[selected], strerror(errno));
beep();
break;
}
if (!S_ISDIR(st.st_mode)) {
retval = mallocstrcpy(retval, filelist[selected]);
abort = TRUE;
break;
}
dir = opendir(filelist[selected]);
if (dir == NULL) {
/* We can't open this dir for some reason.
* Complain. */
statusbar(_("Error reading %s: %s"),
filelist[selected], strerror(errno));
break;
}
path = mallocstrcpy(path, filelist[selected]);
/* Start over again with the new path value. */
free_charptrarray(filelist, numents);
goto change_browser_directory;
/* Refresh the screen. */
case NANO_REFRESH_KEY:
total_update();
break;
/* Go to a specific directory. */
case NANO_GOTOLINE_KEY:
case NANO_GOTOLINE_FKEY:
case 'G': /* Pico compatibility. */
case 'g':
curs_set(1);
j = statusq(FALSE, gotodir_list, "",
#ifndef NANO_SMALL
NULL,
#endif
_("Go To Directory"));
curs_set(0);
bottombars(browser_list);
if (j < 0) {
statusbar(_("Cancelled"));
break;
}
new_path = real_dir_from_tilde(answer);
if (new_path[0] != '/') {
new_path = charealloc(new_path, strlen(path) +
strlen(answer) + 1);
sprintf(new_path, "%s%s", path, answer);
}
#ifndef DISABLE_OPERATINGDIR
if (check_operating_dir(new_path, FALSE)) {
statusbar(
_("Can't go outside of %s in restricted mode"),
operating_dir);
free(new_path);
break;
}
#endif
dir = opendir(new_path);
if (dir == NULL) {
/* We can't open this dir for some reason.
* Complain. */
statusbar(_("Error reading %s: %s"), answer,
strerror(errno));
free(new_path);
break;
}
/* Start over again with the new path value. */
free(path);
path = new_path;
free_charptrarray(filelist, numents);
goto change_browser_directory;
/* Abort the browser. */
case NANO_CANCEL_KEY:
case NANO_EXIT_KEY:
case NANO_EXIT_FKEY:
case 'E': /* Pico compatibility. */
case 'e':
abort = TRUE;
break;
}
if (abort)
break;
blank_edit();
if (width != 0)
j = width * editwinrows *
((selected / width) / editwinrows);
else
j = 0;
wmove(edit, 0, 0);
{
int foo_len = mb_cur_max() * 7;
char *foo = charalloc(foo_len + 1);
for (; j < numents && editline <= editwinrows - 1; j++) {
char *disp = display_string(tail(filelist[j]), 0,
longest, FALSE);
/* Highlight the currently selected file/dir. */
if (j == selected)
wattron(edit, A_REVERSE);
mvwaddnstr(edit, editline, col, hblank, longest);
mvwaddstr(edit, editline, col, disp);
free(disp);
col += longest;
filecols++;
/* Show file info also. We don't want to report file
* sizes for links, so we use lstat(). Also, stat() and
* lstat() return an error if, for example, the file is
* deleted while the file browser is open. In that
* case, we report "--" as the file info. */
if (lstat(filelist[j], &st) == -1 ||
S_ISLNK(st.st_mode)) {
/* Aha! It's a symlink! Now, is it a dir? If so,
* mark it as such. */
if (stat(filelist[j], &st) == 0 &&
S_ISDIR(st.st_mode)) {
strncpy(foo, _("(dir)"), foo_len);
foo[foo_len] = '\0';
} else
strcpy(foo, "--");
} else if (S_ISDIR(st.st_mode))
strncpy(foo, _("(dir)"), foo_len);
else if (st.st_size < (1 << 10)) /* less than 1 k. */
sprintf(foo, "%4u B", (unsigned int)st.st_size);
else if (st.st_size < (1 << 20)) /* less than 1 meg. */
sprintf(foo, "%4u KB",
(unsigned int)(st.st_size >> 10));
else if (st.st_size < (1 << 30)) /* less than 1 gig. */
sprintf(foo, "%4u MB",
(unsigned int)(st.st_size >> 20));
else
sprintf(foo, "%4u GB",
(unsigned int)(st.st_size >> 30));
mvwaddnstr(edit, editline, col - strlen(foo), foo,
foo_len);
if (j == selected)
wattroff(edit, A_REVERSE);
/* Add some space between the columns. */
col += 2;
/* If the next entry isn't going to fit on the line,
* move to the next line. */
if (col > COLS - longest) {
editline++;
col = 0;
if (width == 0)
width = filecols;
}
wmove(edit, editline, col);
}
free(foo);
}
wrefresh(edit);
} while ((kbinput = get_kbinput(edit, &meta_key, &func_key)) !=
NANO_EXIT_KEY && kbinput != NANO_EXIT_FKEY);
blank_edit();
titlebar(NULL);
edit_refresh();
curs_set(1);
if (old_constupdate)
SET(CONSTUPDATE);
/* Clean up. */
free_charptrarray(filelist, numents);
free(path);
return retval;
}
/* The file browser front end. We check to see if inpath has a dir in
* it. If it does, we start do_browser() from there. Otherwise, we
* start do_browser() from the current directory. */
char *do_browse_from(const char *inpath)
{
struct stat st;
char *path;
/* This holds the tilde-expanded version of inpath. */
DIR *dir = NULL;
assert(inpath != NULL);
path = real_dir_from_tilde(inpath);
/* Perhaps path is a directory. If so, we'll pass it to
* do_browser(). Or perhaps path is a directory / a file. If so,
* we'll try stripping off the last path element and passing it to
* do_browser(). Or perhaps path doesn't have a directory portion
* at all. If so, we'll just pass the current directory to
* do_browser(). */
if (stat(path, &st) == -1 || !S_ISDIR(st.st_mode)) {
striponedir(path);
if (stat(path, &st) == -1 || !S_ISDIR(st.st_mode)) {
free(path);
path = charalloc(PATH_MAX + 1);
path = getcwd(path, PATH_MAX + 1);
if (path != NULL)
align(&path);
}
}
#ifndef DISABLE_OPERATINGDIR
/* If the resulting path isn't in the operating directory, use
* the operating directory instead. */
if (check_operating_dir(path, FALSE)) {
if (path != NULL)
free(path);
path = mallocstrcpy(NULL, operating_dir);
}
#endif
if (path != NULL)
dir = opendir(path);
if (dir == NULL) {
beep();
free(path);
return NULL;
}
return do_browser(path, dir);
}
#endif /* !DISABLE_BROWSER */
#if !defined(NANO_SMALL) && 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;
}
void load_history(void)
{
char *nanohist = histfilename();
/* assume do_rcfile() has reported missing home dir */
if (nanohist != NULL) {
FILE *hist = fopen(nanohist, "r");
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 Return to continue starting nano\n"));
while (getchar() != '\n')
;
}
} else {
historyheadtype *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);
UNSET(HISTORY_CHANGED);
}
free(nanohist);
}
}
bool writehist(FILE *hist, historyheadtype *histhead)
{
historytype *h;
/* write oldest first */
for (h = histhead->tail; h->prev != NULL; h = h->prev) {
size_t len = strlen(h->data);
sunder(h->data);
if (fwrite(h->data, sizeof(char), len, hist) < 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 ((search_history.count == 0 && replace_history.count == 0) ||
!ISSET(HISTORY_CHANGED) || ISSET(VIEW_MODE))
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 {
/* set rw only by owner for security ?? */
chmod(nanohist, S_IRUSR | S_IWUSR);
if (!writehist(hist, &search_history) ||
putc('\n', hist) == EOF ||
!writehist(hist, &replace_history))
rcfile_error(N_("Error writing %s: %s"), nanohist,
strerror(errno));
fclose(hist);
}
free(nanohist);
}
}
#endif /* !NANO_SMALL && ENABLE_NANORC */