/* $Id$ */
/**************************************************************************
* 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 <stdio.h>
#include <string.h>
#include <unistd.h>
#include <utime.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
#include <pwd.h>
/* 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 == TRUE) {
/* 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 == 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. */
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;
free(answer);
answer = tmp;
/* We have a file now. Indicate this and get out of the
* statusbar prompt cleanly. */
i = 0;
do_prompt_abort();
}
#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, unless we're here in view
* mode, which we can be if multibuffer mode is on. */
if (!ISSET(VIEW_MODE))
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 illegal 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);
assert(d_there != NULL);
/* 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) == 0 &&
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 {
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 then. */
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. */
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)
{
/* 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_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
(openfile->mark_set && !exiting) ? "" :
#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 (openfile->mark_set && !exiting)
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;
free(answer);
answer = tmp;
/* We have a file now. Get out of the statusbar prompt
* cleanly. */
do_prompt_abort();
} 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 && strcmp(answer,
openfile->filename) != 0) {
struct stat st;
if (!stat(answer, &st)) {
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. In this case, don't
* bother showing the "Different Name" prompt. */
} 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 /* !NANO_TINY */
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 <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;
}
/* 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);
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 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 == FALSE || 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 == FALSE)
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 */