embedaddon/readline/histfile.c - diff

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Diff for /embedaddon/readline/histfile.c between versions 1.1 and 1.1.1.2

version 1.1, 2014/07/30 08:16:45	version 1.1.1.2, 2021/03/17 01:01:01
Line 1	Line 1
/* histfile.c - functions to manipulate the history file. */	/* histfile.c - functions to manipulate the history file. */

/* Copyright (C) 1989-2010 Free Software Foundation, Inc.	/* Copyright (C) 1989-2019 Free Software Foundation, Inc.

This file contains the GNU History Library (History), a set of	This file contains the GNU History Library (History), a set of
routines for managing the text of previously typed lines.	routines for managing the text of previously typed lines.
Line 26	Line 26
#define READLINE_LIBRARY	#define READLINE_LIBRARY

#if defined (__TANDEM)	#if defined (__TANDEM)
	# define _XOPEN_SOURCE_EXTENDED 1
	# include <unistd.h>
# include <floss.h>	# include <floss.h>
#endif	#endif

Line 35	Line 37

#include <stdio.h>	#include <stdio.h>

	#if defined (HAVE_LIMITS_H)
	# include <limits.h>
	#endif

#include <sys/types.h>	#include <sys/types.h>
#if ! defined (_MINIX) && defined (HAVE_SYS_FILE_H)	#if ! defined (_MINIX) && defined (HAVE_SYS_FILE_H)
# include <sys/file.h>	# include <sys/file.h>
Line 75	Line 81

#endif /* HISTORY_USE_MMAP */	#endif /* HISTORY_USE_MMAP */

	#if defined(_WIN32)
	# define WIN32_LEAN_AND_MEAN
	# include <windows.h>
	#endif

/* If we're compiling for __EMX__ (OS/2) or __CYGWIN__ (cygwin32 environment	/* If we're compiling for __EMX__ (OS/2) or __CYGWIN__ (cygwin32 environment
on win 95/98/nt), we want to open files with O_BINARY mode so that there	on win 95/98/nt), we want to open files with O_BINARY mode so that there
is no \n -> \r\n conversion performed. On other systems, we don't want to	is no \n -> \r\n conversion performed. On other systems, we don't want to
Line 99 extern int errno;	Line 110 extern int errno;
#include "rlshell.h"	#include "rlshell.h"
#include "xmalloc.h"	#include "xmalloc.h"

	#if !defined (PATH_MAX)
	# define PATH_MAX 1024 /* default */
	#endif

	extern void _hs_append_history_line PARAMS((int, const char *));

	/* history file version; currently unused */
	int history_file_version = 1;

/* If non-zero, we write timestamps to the history file in history_do_write() */	/* If non-zero, we write timestamps to the history file in history_do_write() */
int history_write_timestamps = 0;	int history_write_timestamps = 0;

	/* If non-zero, we assume that a history file that starts with a timestamp
	uses timestamp-delimited entries and can include multi-line history
	entries. Used by read_history_range */
	int history_multiline_entries = 0;

	/* Immediately after a call to read_history() or read_history_range(), this
	will return the number of lines just read from the history file in that
	call. */
	int history_lines_read_from_file = 0;

	/* Immediately after a call to write_history() or history_do_write(), this
	will return the number of lines just written to the history file in that
	call. This also works with history_truncate_file. */
	int history_lines_written_to_file = 0;

/* Does S look like the beginning of a history timestamp entry? Placeholder	/* Does S look like the beginning of a history timestamp entry? Placeholder
for more extensive tests. */	for more extensive tests. */
#define HIST_TIMESTAMP_START(s) (*(s) == history_comment_char && isdigit ((s)[1]) )	#define HIST_TIMESTAMP_START(s) (*(s) == history_comment_char && isdigit ((unsigned char)(s)[1]) )

	static char history_backupfile PARAMS((const char ));
	static char history_tempfile PARAMS((const char ));
	static int histfile_backup PARAMS((const char , const char ));
	static int histfile_restore PARAMS((const char , const char ));
	static int history_rename PARAMS((const char , const char ));

/* Return the string that should be used in the place of this	/* Return the string that should be used in the place of this
filename. This only matters when you don't specify the	filename. This only matters when you don't specify the
filename to read_history (), or write_history (). */	filename to read_history (), or write_history (). */
static char *	static char *
history_filename (filename)	history_filename (const char *filename)
const char *filename;
{	{
char *return_val;	char *return_val;
const char *home;	const char *home;
Line 123 history_filename (filename)	Line 163 history_filename (filename)
return (return_val);	return (return_val);

home = sh_get_env_value ("HOME");	home = sh_get_env_value ("HOME");
	#if defined (_WIN32)
	if (home == 0)
	home = sh_get_env_value ("APPDATA");
	#endif

if (home == 0)	if (home == 0)
return (NULL);	return (NULL);
Line 142 history_filename (filename)	Line 186 history_filename (filename)
}	}

static char *	static char *
history_backupfile (filename)	history_backupfile (const char *filename)
const char *filename;
{	{
char *ret;	const char *fn;
	char *ret, linkbuf[PATH_MAX+1];
size_t len;	size_t len;
	ssize_t n;
	struct stat fs;

len = strlen (filename);	fn = filename;
	#if defined (HAVE_READLINK)
	/* Follow symlink to avoid backing up symlink itself; call will fail if
	not a symlink */
	if ((n = readlink (filename, linkbuf, sizeof (linkbuf) - 1)) > 0)
	{
	linkbuf[n] = '\0';
	fn = linkbuf;
	}
	#endif

	len = strlen (fn);
ret = xmalloc (len + 2);	ret = xmalloc (len + 2);
strcpy (ret, filename);	strcpy (ret, fn);
ret[len] = '-';	ret[len] = '-';
ret[len+1] = '\0';	ret[len+1] = '\0';
return ret;	return ret;
}	}

	static char *
	history_tempfile (const char *filename)
	{
	const char *fn;
	char *ret, linkbuf[PATH_MAX+1];
	size_t len;
	ssize_t n;
	struct stat fs;
	int pid;

	fn = filename;
	#if defined (HAVE_READLINK)
	/* Follow symlink so tempfile created in the same directory as any symlinked
	history file; call will fail if not a symlink */
	if ((n = readlink (filename, linkbuf, sizeof (linkbuf) - 1)) > 0)
	{
	linkbuf[n] = '\0';
	fn = linkbuf;
	}
	#endif

	len = strlen (fn);
	ret = xmalloc (len + 11);
	strcpy (ret, fn);

	pid = (int)getpid ();

	/* filename-PID.tmp */
	ret[len] = '-';
	ret[len+1] = (pid / 10000 % 10) + '0';
	ret[len+2] = (pid / 1000 % 10) + '0';
	ret[len+3] = (pid / 100 % 10) + '0';
	ret[len+4] = (pid / 10 % 10) + '0';
	ret[len+5] = (pid % 10) + '0';
	strcpy (ret + len + 6, ".tmp");

	return ret;
	}

/* Add the contents of FILENAME to the history list, a line at a time.	/* Add the contents of FILENAME to the history list, a line at a time.
If FILENAME is NULL, then read from ~/.history. Returns 0 if	If FILENAME is NULL, then read from ~/.history. Returns 0 if
successful, or errno if not. */	successful, or errno if not. */
int	int
read_history (filename)	read_history (const char *filename)
const char *filename;
{	{
return (read_history_range (filename, 0, -1));	return (read_history_range (filename, 0, -1));
}	}
Line 172 read_history (filename)	Line 267 read_history (filename)
until the end of the file. If FILENAME is NULL, then read from	until the end of the file. If FILENAME is NULL, then read from
~/.history. Returns 0 if successful, or errno if not. */	~/.history. Returns 0 if successful, or errno if not. */
int	int
read_history_range (filename, from, to)	read_history_range (const char *filename, int from, int to)
const char *filename;
int from, to;
{	{
register char line_start, line_end, *p;	register char line_start, line_end, *p;
char input, buffer, bufend, last_ts;	char input, buffer, bufend, last_ts;
int file, current_line, chars_read;	int file, current_line, chars_read, has_timestamps, reset_comment_char;
struct stat finfo;	struct stat finfo;
size_t file_size;	size_t file_size;
#if defined (EFBIG)	#if defined (EFBIG)
Line 189 read_history_range (filename, from, to)	Line 282 read_history_range (filename, from, to)
int overflow_errno = EIO;	int overflow_errno = EIO;
#endif	#endif

	history_lines_read_from_file = 0;

buffer = last_ts = (char *)NULL;	buffer = last_ts = (char *)NULL;
input = history_filename (filename);	input = history_filename (filename);
file = input ? open (input, O_RDONLY\|O_BINARY, 0666) : -1;	file = input ? open (input, O_RDONLY\|O_BINARY, 0666) : -1;
Line 196 read_history_range (filename, from, to)	Line 291 read_history_range (filename, from, to)
if ((file < 0) \|\| (fstat (file, &finfo) == -1))	if ((file < 0) \|\| (fstat (file, &finfo) == -1))
goto error_and_exit;	goto error_and_exit;

	if (S_ISREG (finfo.st_mode) == 0)
	{
	#ifdef EFTYPE
	errno = EFTYPE;
	#else
	errno = EINVAL;
	#endif
	goto error_and_exit;
	}

file_size = (size_t)finfo.st_size;	file_size = (size_t)finfo.st_size;

/* check for overflow on very large files */	/* check for overflow on very large files */
Line 205 read_history_range (filename, from, to)	Line 310 read_history_range (filename, from, to)
goto error_and_exit;	goto error_and_exit;
}	}

	if (file_size == 0)
	{
	free (input);
	close (file);
	return 0; /* don't waste time if we don't have to */
	}

#ifdef HISTORY_USE_MMAP	#ifdef HISTORY_USE_MMAP
/* We map read/write and private so we can change newlines to NULs without	/* We map read/write and private so we can change newlines to NULs without
affecting the underlying object. */	affecting the underlying object. */
Line 251 read_history_range (filename, from, to)	Line 363 read_history_range (filename, from, to)

/* Start at beginning of file, work to end. */	/* Start at beginning of file, work to end. */
bufend = buffer + chars_read;	bufend = buffer + chars_read;
	bufend = '\0'; / null-terminate buffer for timestamp checks */
current_line = 0;	current_line = 0;

	/* Heuristic: the history comment character rarely changes, so assume we
	have timestamps if the buffer starts with `#[:digit:]' and temporarily
	set history_comment_char so timestamp parsing works right */
	reset_comment_char = 0;
	if (history_comment_char == '\0' && buffer[0] == '#' && isdigit ((unsigned char)buffer[1]))
	{
	history_comment_char = '#';
	reset_comment_char = 1;
	}

	has_timestamps = HIST_TIMESTAMP_START (buffer);
	history_multiline_entries += has_timestamps && history_write_timestamps;

/* Skip lines until we are at FROM. */	/* Skip lines until we are at FROM. */
	if (has_timestamps)
	last_ts = buffer;
for (line_start = line_end = buffer; line_end < bufend && current_line < from; line_end++)	for (line_start = line_end = buffer; line_end < bufend && current_line < from; line_end++)
if (*line_end == '\n')	if (*line_end == '\n')
{	{
Line 262 read_history_range (filename, from, to)	Line 390 read_history_range (filename, from, to)
line. We should check more extensively here... */	line. We should check more extensively here... */
if (HIST_TIMESTAMP_START(p) == 0)	if (HIST_TIMESTAMP_START(p) == 0)
current_line++;	current_line++;
	else
	last_ts = p;
line_start = p;	line_start = p;
	/* If we are at the last line (current_line == from) but we have
	timestamps (has_timestamps), then line_start points to the
	text of the last command, and we need to skip to its end. */
	if (current_line >= from && has_timestamps)
	{
	for (line_end = p; line_end < bufend && *line_end != '\n'; line_end++)
	;
	line_start = (*line_end == '\n') ? line_end + 1 : line_end;
	}
}	}

/* If there are lines left to gobble, then gobble them now. */	/* If there are lines left to gobble, then gobble them now. */
Line 279 read_history_range (filename, from, to)	Line 418 read_history_range (filename, from, to)
{	{
if (HIST_TIMESTAMP_START(line_start) == 0)	if (HIST_TIMESTAMP_START(line_start) == 0)
{	{
add_history (line_start);	if (last_ts == NULL && history_length > 0 && history_multiline_entries)
	_hs_append_history_line (history_length - 1, line_start);
	else
	add_history (line_start);
if (last_ts)	if (last_ts)
{	{
add_history_time (last_ts);	add_history_time (last_ts);
Line 301 read_history_range (filename, from, to)	Line 443 read_history_range (filename, from, to)
line_start = line_end + 1;	line_start = line_end + 1;
}	}

	history_lines_read_from_file = current_line;
	if (reset_comment_char)
	history_comment_char = '\0';

FREE (input);	FREE (input);
#ifndef HISTORY_USE_MMAP	#ifndef HISTORY_USE_MMAP
FREE (buffer);	FREE (buffer);
Line 311 read_history_range (filename, from, to)	Line 457 read_history_range (filename, from, to)
return (0);	return (0);
}	}

	/* We need a special version for WIN32 because Windows rename() refuses to
	overwrite an existing file. */
	static int
	history_rename (const char old, const char new)
	{
	#if defined (_WIN32)
	return (MoveFileEx (old, new, MOVEFILE_REPLACE_EXISTING) == 0 ? -1 : 0);
	#else
	return (rename (old, new));
	#endif
	}

	/* Save FILENAME to BACK, handling case where FILENAME is a symlink
	(e.g., ~/.bash_history -> .histfiles/.bash_history.$HOSTNAME) */
	static int
	histfile_backup (const char filename, const char back)
	{
	#if defined (HAVE_READLINK)
	char linkbuf[PATH_MAX+1];
	ssize_t n;

	/* Follow to target of symlink to avoid renaming symlink itself */
	if ((n = readlink (filename, linkbuf, sizeof (linkbuf) - 1)) > 0)
	{
	linkbuf[n] = '\0';
	return (history_rename (linkbuf, back));
	}
	#endif
	return (history_rename (filename, back));
	}

	/* Restore ORIG from BACKUP handling case where ORIG is a symlink
	(e.g., ~/.bash_history -> .histfiles/.bash_history.$HOSTNAME) */
	static int
	histfile_restore (const char backup, const char orig)
	{
	#if defined (HAVE_READLINK)
	char linkbuf[PATH_MAX+1];
	ssize_t n;

	/* Follow to target of symlink to avoid renaming symlink itself */
	if ((n = readlink (orig, linkbuf, sizeof (linkbuf) - 1)) > 0)
	{
	linkbuf[n] = '\0';
	return (history_rename (backup, linkbuf));
	}
	#endif
	return (history_rename (backup, orig));
	}

	/* Should we call chown, based on whether finfo and nfinfo describe different
	files with different owners? */

	#define SHOULD_CHOWN(finfo, nfinfo) \
	(finfo.st_uid != nfinfo.st_uid \|\| finfo.st_gid != nfinfo.st_gid)

/* Truncate the history file FNAME, leaving only LINES trailing lines.	/* Truncate the history file FNAME, leaving only LINES trailing lines.
If FNAME is NULL, then use ~/.history. Returns 0 on success, errno	If FNAME is NULL, then use ~/.history. Writes a new file and renames
on failure. */	it to the original name. Returns 0 on success, errno on failure. */
int	int
history_truncate_file (fname, lines)	history_truncate_file (const char *fname, int lines)
const char *fname;
int lines;
{	{
char buffer, filename, bp, bp1; /* bp1 == bp+1 */	char buffer, filename, tempname, bp, bp1; / bp1 == bp+1 */
int file, chars_read, rv;	int file, chars_read, rv, orig_lines, exists, r;
struct stat finfo;	struct stat finfo, nfinfo;
size_t file_size;	size_t file_size;

	history_lines_written_to_file = 0;

buffer = (char *)NULL;	buffer = (char *)NULL;
filename = history_filename (fname);	filename = history_filename (fname);
	tempname = 0;
file = filename ? open (filename, O_RDONLY\|O_BINARY, 0666) : -1;	file = filename ? open (filename, O_RDONLY\|O_BINARY, 0666) : -1;
rv = 0;	rv = exists = 0;

/* Don't try to truncate non-regular files. */	/* Don't try to truncate non-regular files. */
if (file == -1 \|\| fstat (file, &finfo) == -1)	if (file == -1 \|\| fstat (file, &finfo) == -1)
Line 337 history_truncate_file (fname, lines)	Line 540 history_truncate_file (fname, lines)
close (file);	close (file);
goto truncate_exit;	goto truncate_exit;
}	}
	exists = 1;

	nfinfo.st_uid = finfo.st_uid;
	nfinfo.st_gid = finfo.st_gid;

if (S_ISREG (finfo.st_mode) == 0)	if (S_ISREG (finfo.st_mode) == 0)
{	{
close (file);	close (file);
Line 368 history_truncate_file (fname, lines)	Line 575 history_truncate_file (fname, lines)
buffer = (char *)malloc (file_size + 1);	buffer = (char *)malloc (file_size + 1);
if (buffer == 0)	if (buffer == 0)
{	{
	rv = errno;
close (file);	close (file);
goto truncate_exit;	goto truncate_exit;
}	}
Line 381 history_truncate_file (fname, lines)	Line 589 history_truncate_file (fname, lines)
goto truncate_exit;	goto truncate_exit;
}	}

	orig_lines = lines;
/* Count backwards from the end of buffer until we have passed	/* Count backwards from the end of buffer until we have passed
LINES lines. bp1 is set funny initially. But since bp[1] can't	LINES lines. bp1 is set funny initially. But since bp[1] can't
be a comment character (since it's off the end) and *bp can't be	be a comment character (since it's off the end) and *bp can't be
Line 409 history_truncate_file (fname, lines)	Line 618 history_truncate_file (fname, lines)

/* Write only if there are more lines in the file than we want to	/* Write only if there are more lines in the file than we want to
truncate to. */	truncate to. */
if (bp > buffer && ((file = open (filename, O_WRONLY\|O_TRUNC\|O_BINARY, 0600)) != -1))	if (bp <= buffer)
{	{
	rv = 0;
	/* No-op if LINES == 0 at this point */
	history_lines_written_to_file = orig_lines - lines;
	goto truncate_exit;
	}

	tempname = history_tempfile (filename);

	if ((file = open (tempname, O_WRONLY\|O_CREAT\|O_TRUNC\|O_BINARY, 0600)) != -1)
	{
if (write (file, bp, chars_read - (bp - buffer)) < 0)	if (write (file, bp, chars_read - (bp - buffer)) < 0)
rv = errno;	rv = errno;

#if defined (__BEOS__)	if (fstat (file, &nfinfo) < 0 && rv == 0)
/* BeOS ignores O_TRUNC. */	rv = errno;
ftruncate (file, chars_read - (bp - buffer));
#endif

if (close (file) < 0 && rv == 0)	if (close (file) < 0 && rv == 0)
rv = errno;	rv = errno;
}	}
	else
	rv = errno;

truncate_exit:	truncate_exit:

FREE (buffer);	FREE (buffer);

	history_lines_written_to_file = orig_lines - lines;

	if (rv == 0 && filename && tempname)
	rv = histfile_restore (tempname, filename);

	if (rv != 0)
	{
	rv = errno;
	if (tempname)
	unlink (tempname);
	history_lines_written_to_file = 0;
	}

	#if defined (HAVE_CHOWN)
	/* Make sure the new filename is owned by the same user as the old. If one
	user is running this, it's a no-op. If the shell is running after sudo
	with a shared history file, we don't want to leave the history file
	owned by root. */
	if (rv == 0 && exists && SHOULD_CHOWN (finfo, nfinfo))
	r = chown (filename, finfo.st_uid, finfo.st_gid);
	#endif

xfree (filename);	xfree (filename);
	FREE (tempname);

return rv;	return rv;
}	}

/* Workhorse function for writing history. Writes NELEMENT entries	/* Workhorse function for writing history. Writes the last NELEMENT entries
from the history list to FILENAME. OVERWRITE is non-zero if you	from the history list to FILENAME. OVERWRITE is non-zero if you
wish to replace FILENAME with the entries. */	wish to replace FILENAME with the entries. */
static int	static int
history_do_write (filename, nelements, overwrite)	history_do_write (const char *filename, int nelements, int overwrite)
const char *filename;
int nelements, overwrite;
{	{
register int i;	register int i;
char output, bakname;	char output, tempname, *histname;
int file, mode, rv;	int file, mode, rv, exists;
	struct stat finfo, nfinfo;
#ifdef HISTORY_USE_MMAP	#ifdef HISTORY_USE_MMAP
size_t cursize;	size_t cursize;

	history_lines_written_to_file = 0;

mode = overwrite ? O_RDWR\|O_CREAT\|O_TRUNC\|O_BINARY : O_RDWR\|O_APPEND\|O_BINARY;	mode = overwrite ? O_RDWR\|O_CREAT\|O_TRUNC\|O_BINARY : O_RDWR\|O_APPEND\|O_BINARY;
#else	#else
mode = overwrite ? O_WRONLY\|O_CREAT\|O_TRUNC\|O_BINARY : O_WRONLY\|O_APPEND\|O_BINARY;	mode = overwrite ? O_WRONLY\|O_CREAT\|O_TRUNC\|O_BINARY : O_WRONLY\|O_APPEND\|O_BINARY;
#endif	#endif
output = history_filename (filename);	histname = history_filename (filename);
bakname = (overwrite && output) ? history_backupfile (output) : 0;	exists = histname ? (stat (histname, &finfo) == 0) : 0;

if (output && bakname)	tempname = (overwrite && exists && S_ISREG (finfo.st_mode)) ? history_tempfile (histname) : 0;
rename (output, bakname);	output = tempname ? tempname : histname;

file = output ? open (output, mode, 0600) : -1;	file = output ? open (output, mode, 0600) : -1;
rv = 0;	rv = 0;
Line 461 history_do_write (filename, nelements, overwrite)	Line 704 history_do_write (filename, nelements, overwrite)
if (file == -1)	if (file == -1)
{	{
rv = errno;	rv = errno;
if (output && bakname)	FREE (histname);
rename (bakname, output);	FREE (tempname);
FREE (output);
FREE (bakname);
return (rv);	return (rv);
}	}

Line 486 history_do_write (filename, nelements, overwrite)	Line 727 history_do_write (filename, nelements, overwrite)
the_history = history_list ();	the_history = history_list ();
/* Calculate the total number of bytes to write. */	/* Calculate the total number of bytes to write. */
for (buffer_size = 0, i = history_length - nelements; i < history_length; i++)	for (buffer_size = 0, i = history_length - nelements; i < history_length; i++)
#if 0
buffer_size += 2 + HISTENT_BYTES (the_history[i]);
#else
{	{
if (history_write_timestamps && the_history[i]->timestamp && the_history[i]->timestamp[0])	if (history_write_timestamps && the_history[i]->timestamp && the_history[i]->timestamp[0])
buffer_size += strlen (the_history[i]->timestamp) + 1;	buffer_size += strlen (the_history[i]->timestamp) + 1;
buffer_size += strlen (the_history[i]->line) + 1;	buffer_size += strlen (the_history[i]->line) + 1;
}	}
#endif

/* Allocate the buffer, and fill it. */	/* Allocate the buffer, and fill it. */
#ifdef HISTORY_USE_MMAP	#ifdef HISTORY_USE_MMAP
Line 506 history_do_write (filename, nelements, overwrite)	Line 743 history_do_write (filename, nelements, overwrite)
mmap_error:	mmap_error:
rv = errno;	rv = errno;
close (file);	close (file);
if (output && bakname)	if (tempname)
rename (bakname, output);	unlink (tempname);
FREE (output);	FREE (histname);
FREE (bakname);	FREE (tempname);
return rv;	return rv;
}	}
#else	#else
Line 518 mmap_error:	Line 755 mmap_error:
{	{
rv = errno;	rv = errno;
close (file);	close (file);
if (output && bakname)	if (tempname)
rename (bakname, output);	unlink (tempname);
FREE (output);	FREE (histname);
FREE (bakname);	FREE (tempname);
return rv;	return rv;
}	}
#endif	#endif
Line 540 mmap_error:	Line 777 mmap_error:
}	}

#ifdef HISTORY_USE_MMAP	#ifdef HISTORY_USE_MMAP
if (msync (buffer, buffer_size, 0) != 0 \|\| munmap (buffer, buffer_size) != 0)	if (msync (buffer, buffer_size, MS_ASYNC) != 0 \|\| munmap (buffer, buffer_size) != 0)
rv = errno;	rv = errno;
#else	#else
if (write (file, buffer, buffer_size) < 0)	if (write (file, buffer, buffer_size) < 0)
Line 549 mmap_error:	Line 786 mmap_error:
#endif	#endif
}	}

	history_lines_written_to_file = nelements;

if (close (file) < 0 && rv == 0)	if (close (file) < 0 && rv == 0)
rv = errno;	rv = errno;

if (rv != 0 && output && bakname)	if (rv == 0 && histname && tempname)
rename (bakname, output);	rv = histfile_restore (tempname, histname);
else if (rv == 0 && bakname)
unlink (bakname);

FREE (output);	if (rv != 0)
FREE (bakname);	{
	rv = errno;
	if (tempname)
	unlink (tempname);
	history_lines_written_to_file = 0;
	}

	#if defined (HAVE_CHOWN)
	/* Make sure the new filename is owned by the same user as the old. If one
	user is running this, it's a no-op. If the shell is running after sudo
	with a shared history file, we don't want to leave the history file
	owned by root. */
	if (rv == 0 && exists)
	mode = chown (histname, finfo.st_uid, finfo.st_gid);
	#endif

	FREE (histname);
	FREE (tempname);

return (rv);	return (rv);
}	}

/* Append NELEMENT entries to FILENAME. The entries appended are from	/* Append NELEMENT entries to FILENAME. The entries appended are from
the end of the list minus NELEMENTs up to the end of the list. */	the end of the list minus NELEMENTs up to the end of the list. */
int	int
append_history (nelements, filename)	append_history (int nelements, const char *filename)
int nelements;
const char *filename;
{	{
return (history_do_write (filename, nelements, HISTORY_APPEND));	return (history_do_write (filename, nelements, HISTORY_APPEND));
}	}
Line 577 append_history (nelements, filename)	Line 829 append_history (nelements, filename)
then write the history list to ~/.history. Values returned	then write the history list to ~/.history. Values returned
are as in read_history ().*/	are as in read_history ().*/
int	int
write_history (filename)	write_history (const char *filename)
const char *filename;
{	{
return (history_do_write (filename, history_length, HISTORY_OVERWRITE));	return (history_do_write (filename, history_length, HISTORY_OVERWRITE));
}	}

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Removed from v.1.1
changed lines
	Added in v.1.1.1.2