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fix potential memory corruption problems caused by passing answer in as

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the value of def in statusq(), etc.


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@1695 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
This commit is contained in:
David Lawrence Ramsey 2004-03-15 20:26:30 +00:00
parent dc10ecbbd6
commit 6aec4b85e6
7 changed files with 120 additions and 91 deletions
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15
ChangeLog
View File

@ -31,6 +31,13 @@ CVS code -
and use tail() to get the filename if get_full_path() fails.
- Port to the Tandem NonStop Kernel (nsr-tandem-nsk). (Tom
Bates; minor tweaks by DLR)
- Change some instances of boolean 0 and 1 to TRUE and FALSE.
(David Benbennick)
- Fix memory corruption problem occurring when answer is used as
the value of def; if the realloc() of answer leads to its
pointing to a different memory block, there will be a segfault
when the value of def is copied into it via strcpy(). (bort,
Christian Weisgarber, David Benbennick, and DLR)
- files.c:
do_insertfile()
- Wrap one reference to NANO_EXTCMD_KEY in a NANO_SMALL #ifdef.
@ -45,6 +52,9 @@ CVS code -
write_marked()
- New function used to write the current marked selection to a
file, split out from do_writeout(). (DLR)
do_writeout()
- Tweak for efficiency. (David Benbennick) DLR: Modify to have
the current answer preserved between toggles again.
filestat()
- Removed, as it is only called in one place and is
redundant. (DLR)
@ -175,6 +185,9 @@ CVS code -
strstrwrapper()
- Refactor for increased efficiency, and eliminate the need for
the line_pos parameter. (David Benbennick)
mallocstrcpy()
- Tweak so that when src is "", "" is allocated and returned
instead of NULL. (David Benbennick)
- winio.c:
get_verbatim_kbinput()
- Set keypad() to FALSE and switch to raw mode while reading
@ -212,6 +225,8 @@ CVS code -
- Tweak for efficiency. (David Benbennick)
edit_refresh()
- Tweak for efficiency. (David Benbennick)
statusq()
- Rename "tabs" to "allowtabs". (David Benbennick)
do_credits()
- Use nanosleep() instead of usleep(). The latter is only
standard under BSD, whereas the former is POSIX compliant.

136
src/files.c
View File

@ -406,7 +406,7 @@ char *get_next_filename(const char *name)
buf = charalloc(strlen(name) + num_of_digits(INT_MAX) + 2);
strcpy(buf, name);
while (1) {
while (TRUE) {
if (stat(buf, &fs) == -1)
return buf;
@ -451,17 +451,17 @@ int do_insertfile(int loading_file)
if (operating_dir != NULL && strcmp(operating_dir, "."))
#ifdef ENABLE_MULTIBUFFER
if (ISSET(MULTIBUFFER))
i = statusq(1, insertfile_list, inspath,
i = statusq(TRUE, insertfile_list, inspath,
#ifndef NANO_SMALL
0,
NULL,
#endif
_("File to insert into new buffer [from %s] "),
operating_dir);
else
#endif
i = statusq(1, insertfile_list, inspath,
i = statusq(TRUE, insertfile_list, inspath,
#ifndef NANO_SMALL
0,
NULL,
#endif
_("File to insert [from %s] "),
operating_dir);
@ -470,16 +470,16 @@ int do_insertfile(int loading_file)
#endif
#ifdef ENABLE_MULTIBUFFER
if (ISSET(MULTIBUFFER))
i = statusq(1, insertfile_list, inspath,
i = statusq(TRUE, insertfile_list, inspath,
#ifndef NANO_SMALL
0,
NULL,
#endif
_("File to insert into new buffer [from ./] "));
else
#endif /* ENABLE_MULTIBUFFER */
i = statusq(1, insertfile_list, inspath,
i = statusq(TRUE, insertfile_list, inspath,
#ifndef NANO_SMALL
0,
NULL,
#endif
_("File to insert [from ./] "));
@ -501,8 +501,12 @@ int do_insertfile(int loading_file)
#endif /* ENABLE_MULTIBUFFER */
if (i == NANO_EXTCMD_KEY) {
int ts = statusq(TRUE, extcmd_list, answer, NULL,
char *ans = mallocstrcpy(NULL, answer);
int ts = statusq(TRUE, extcmd_list, ans, NULL,
_("Command to execute"));
free(ans);
if (ts == -1 || answer == NULL || answer[0] == '\0') {
statusbar(_("Cancelled"));
display_main_list();
@ -1802,35 +1806,50 @@ int write_marked(const char *name, int tmp, int append, int
}
#endif /* !NANO_SMALL */
int do_writeout(const char *path, int exiting, int append)
int do_writeout(int exiting)
{
int i = 0;
int i;
int append = 0;
#ifdef NANO_EXTRA
static int did_cred = 0;
static int did_cred = FALSE;
#endif
#if !defined(DISABLE_BROWSER) || !defined(DISABLE_MOUSE)
currshortcut = writefile_list;
#endif
answer = mallocstrcpy(answer, path);
if (exiting && ISSET(TEMP_OPT)) {
i = -1;
if (filename[0] != '\0') {
i = write_file(answer, 0, 0, 0);
display_main_list();
return i;
} else {
i = write_file(filename, FALSE, 0, FALSE);
if (i == 1) {
/* Write succeeded. */
display_main_list();
return 1;
}
}
/* No filename or the write above failed. */
if (i == -1) {
UNSET(TEMP_OPT);
do_exit();
/* They cancelled, abort quit */
/* They cancelled; abort quit. */
return -1;
}
}
while (1) {
#ifndef NANO_SMALL
if (ISSET(MARK_ISSET) && !exiting)
answer = mallocstrcpy(answer, "");
else
#endif
answer = mallocstrcpy(answer, filename);
while (TRUE) {
const char *msg;
#ifndef NANO_SMALL
char *ans = mallocstrcpy(NULL, answer);
const char *formatstr, *backupstr;
if (ISSET(MAC_FILE))
@ -1845,44 +1864,39 @@ int do_writeout(const char *path, int exiting, int append)
else
backupstr = "";
/* Be nice to the translation folks */
/* Be nice to the translation folks. */
if (ISSET(MARK_ISSET) && !exiting) {
if (append == 2)
i = statusq(1, writefile_list, "", 0,
"%s%s%s", _("Prepend Selection to File"), formatstr, backupstr);
msg = _("Prepend Selection to File");
else if (append == 1)
i = statusq(1, writefile_list, "", 0,
"%s%s%s", _("Append Selection to File"), formatstr, backupstr);
msg = _("Append Selection to File");
else
i = statusq(1, writefile_list, "", 0,
"%s%s%s", _("Write Selection to File"), formatstr, backupstr);
} else {
if (append == 2)
i = statusq(1, writefile_list, answer, 0,
"%s%s%s", _("File Name to Prepend to"), formatstr, backupstr);
else if (append == 1)
i = statusq(1, writefile_list, answer, 0,
"%s%s%s", _("File Name to Append to"), formatstr, backupstr);
else
i = statusq(1, writefile_list, answer, 0,
"%s%s%s", _("File Name to Write"), formatstr, backupstr);
}
#else
if (append == 2)
i = statusq(1, writefile_list, answer,
"%s", _("File Name to Prepend to"));
else if (append == 1)
i = statusq(1, writefile_list, answer,
"%s", _("File Name to Append to"));
else
i = statusq(1, writefile_list, answer,
"%s", _("File Name to Write"));
msg = _("Write Selection to File");
} else
#endif /* !NANO_SMALL */
if (append == 2)
msg = _("File Name to Prepend to");
else if (append == 1)
msg = _("File Name to Append to");
else
msg = _("File Name to Write");
i = statusq(TRUE, writefile_list,
#ifndef NANO_SMALL
ans, NULL, "%s%s%s", msg, formatstr, backupstr
#else
filename, "%s", msg
#endif
);
#ifndef NANO_SMALL
free(ans);
#endif
if (i == -1) {
statusbar(_("Cancelled"));
display_main_list();
return 0;
return -1;
}
#ifndef DISABLE_BROWSER
@ -1926,7 +1940,7 @@ int do_writeout(const char *path, int exiting, int append)
if (exiting && !ISSET(TEMP_OPT) && !strcasecmp(answer, "zzy")
&& !did_cred) {
do_credits();
did_cred = 1;
did_cred = TRUE;
return -1;
}
#endif
@ -1934,7 +1948,7 @@ int do_writeout(const char *path, int exiting, int append)
struct stat st;
if (!stat(answer, &st)) {
i = do_yesno(0, _("File exists, OVERWRITE ?"));
i = do_yesno(FALSE, _("File exists, OVERWRITE ?"));
if (i == 0 || i == -1)
continue;
} else if (filename[0] != '\0'
@ -1942,7 +1956,7 @@ int do_writeout(const char *path, int exiting, int append)
&& (!ISSET(MARK_ISSET) || exiting)
#endif
) {
i = do_yesno(0, _("Save file under DIFFERENT NAME ?"));
i = do_yesno(FALSE, _("Save file under DIFFERENT NAME ?"));
if (i == 0 || i == -1)
continue;
}
@ -1952,25 +1966,25 @@ int do_writeout(const char *path, int exiting, int append)
/* Here's where we allow the selected text to be written to
* a separate file. */
if (ISSET(MARK_ISSET) && !exiting)
i = write_marked(answer, 0, append, 1);
i = write_marked(answer, FALSE, append, FALSE);
else
#endif /* !NANO_SMALL */
i = write_file(answer, 0, append, 0);
i = 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. */
* the open_files structure. */
if (!exiting)
add_open_file(1);
#endif
display_main_list();
return i;
} /* while (1) */
} /* while (TRUE) */
}
int do_writeout_void(void)
{
return do_writeout(filename, 0, 0);
return do_writeout(FALSE);
}
/* Return a malloc()ed string containing the actual directory, used
@ -2338,7 +2352,7 @@ char *input_tab(char *buf, int place, int *lastwastab, int *newplace, int *list)
pos <= strlen(matches[0]); pos++)
tmp++;
while (1) {
while (TRUE) {
match_matches = 0;
for (i = 0; i < num_matches; i++) {
@ -2752,9 +2766,9 @@ char *do_browser(const char *inpath)
case 'G': /* Pico compatibility */
case 'g':
curs_set(1);
j = statusq(0, gotodir_list, "",
j = statusq(FALSE, gotodir_list, "",
#ifndef NANO_SMALL
0,
NULL,
#endif
_("Goto Directory"));
bottombars(browser_list);

8
src/nano.c
View File

@ -1511,7 +1511,7 @@ int do_int_spell_fix(const char *word)
do_replace_highlight(TRUE, word);
/* Allow the replace word to be corrected. */
i = statusq(0, spell_list, word,
i = statusq(FALSE, spell_list, word,
#ifndef NANO_SMALL
NULL,
#endif
@ -2739,14 +2739,14 @@ int do_exit(void)
if (ISSET(TEMP_OPT))
i = 1;
else
i = do_yesno(0, _("Save modified buffer (ANSWERING \"No\" WILL DESTROY CHANGES) ? "));
i = do_yesno(FALSE, _("Save modified buffer (ANSWERING \"No\" WILL DESTROY CHANGES) ? "));
#ifdef DEBUG
dump_buffer(fileage);
#endif
if (i == 1) {
if (do_writeout(filename, 1, 0) > 0) {
if (do_writeout(TRUE) > 0) {
#ifdef ENABLE_MULTIBUFFER
if (!close_open_file()) {
@ -3528,7 +3528,7 @@ int main(int argc, char *argv[])
edit_refresh();
reset_cursor();
while (1) {
while (TRUE) {
keyhandled = 0;
if (ISSET(CONSTUPDATE))

4
src/proto.h
View File

@ -190,7 +190,7 @@ int write_file(const char *name, int tmp, int append, int nonamechange);
int write_marked(const char *name, int tmp, int append, int
nonamechange);
#endif
int do_writeout(const char *path, int exiting, int append);
int do_writeout(int exiting);
int do_writeout_void(void);
char *real_dir_from_tilde(const char *buf);
#ifndef DISABLE_TABCOMP
@ -503,7 +503,7 @@ void center_cursor(void);
void edit_refresh(void);
void edit_refresh_clearok(void);
void edit_update(filestruct *fileptr, topmidnone location);
int statusq(int tabs, const shortcut *s, const char *def,
int statusq(int allowtabs, const shortcut *s, const char *def,
#ifndef NANO_SMALL
historyheadtype *history_list,
#endif

27
src/search.c
View File

@ -136,12 +136,12 @@ int search_init(int replacing)
}
/* This is now one simple call. It just does a lot. */
i = statusq(0, replacing ? replace_list : whereis_list, backupstring,
i = statusq(FALSE, replacing ? replace_list : whereis_list,
backupstring,
#ifndef NANO_SMALL
&search_history,
#endif
"%s%s%s%s%s%s",
_("Search"),
"%s%s%s%s%s%s", _("Search"),
#ifndef NANO_SMALL
/* This string is just a modifier for the search prompt; no
@ -275,7 +275,7 @@ int findnextstr(int can_display_wrap, int wholeword, const filestruct
rev_start = fileptr->data + (current_x + 1);
/* Look for needle in searchstr. */
while (1) {
while (TRUE) {
found = strstrwrapper(fileptr->data, needle, rev_start);
if (found != NULL && (!wholeword || is_whole_word(found -
@ -645,7 +645,7 @@ int do_replace_loop(const char *needle, const filestruct *real_current,
curs_set(0);
do_replace_highlight(TRUE, exp_word);
i = do_yesno(1, _("Replace this instance?"));
i = do_yesno(TRUE, _("Replace this instance?"));
do_replace_highlight(FALSE, exp_word);
free(exp_word);
@ -763,11 +763,11 @@ int do_replace(void)
last_replace = mallocstrcpy(last_replace, "");
#endif
i = statusq(0, replace_list_2, last_replace,
i = statusq(FALSE, replace_list_2, last_replace,
#ifndef NANO_SMALL
&replace_history,
&replace_history,
#endif
_("Replace with"));
_("Replace with"));
#ifndef NANO_SMALL
/* Add this replace string to the replace history list. i == 0
@ -813,11 +813,14 @@ int do_replace(void)
int do_gotoline(int line, int save_pos)
{
if (line <= 0) { /* Ask for it */
int st = statusq(FALSE, goto_list, line != 0 ? answer : "",
char *ans = mallocstrcpy(NULL, answer);
int st = statusq(FALSE, goto_list, line != 0 ? ans : "",
#ifndef NANO_SMALL
NULL,
NULL,
#endif
_("Enter line number"));
_("Enter line number"));
free(ans);
/* Cancel, or Enter with blank string. */
if (st == -1 || st == -2)
@ -918,7 +921,7 @@ int do_find_bracket(void)
assert(ISSET(REGEXP_COMPILED));
search_last_line = 0;
while (1) {
while (TRUE) {
if (findnextstr(FALSE, FALSE, current, current_x, regexp_pat, FALSE) != 0) {
/* Found identical bracket. */
if (current->data[current_x] == ch_under_cursor)

11
src/utils.c
View File

@ -293,14 +293,11 @@ void *nrealloc(void *ptr, size_t howmuch)
* dest = mallocstrcpy(dest, src); */
char *mallocstrcpy(char *dest, const char *src)
{
if (src == dest)
return dest;
if (dest != NULL)
free(dest);
if (src == NULL)
return NULL;
src = "";
if (src != dest)
free(dest);
dest = charalloc(strlen(src) + 1);
strcpy(dest, src);

10
src/winio.c
View File

@ -127,7 +127,7 @@ int get_ignored_kbinput(WINDOW *win)
{
int kbinput;
while (1) {
while (TRUE) {
kbinput = wgetch(win);
switch (kbinput) {
case ERR:
@ -1065,7 +1065,7 @@ void nanoget_repaint(const char *buf, const char *inputbuf, size_t x)
wattroff(bottomwin, A_REVERSE);
}
/* Get the input from the kb; this should only be called from
/* Get the input from the keyboard; this should only be called from
* statusq(). */
int nanogetstr(int allowtabs, const char *buf, const char *def,
#ifndef NANO_SMALL
@ -1671,7 +1671,7 @@ void edit_add(const filestruct *fileptr, const char *converted,
* line not followed by an end on this line? */
start_col = 0;
while (1) {
while (TRUE) {
start_col += startmatch.rm_so;
startmatch.rm_eo -= startmatch.rm_so;
if (regexec(tmpcolor->end,
@ -2011,7 +2011,7 @@ void edit_update(filestruct *fileptr, topmidnone location)
* want to put up by default.
*
* New arg tabs tells whether or not to allow tab completion. */
int statusq(int tabs, const shortcut *s, const char *def,
int statusq(int allowtabs, const shortcut *s, const char *def,
#ifndef NANO_SMALL
historyheadtype *which_history,
#endif
@ -2031,7 +2031,7 @@ int statusq(int tabs, const shortcut *s, const char *def,
va_end(ap);
foo[COLS - 4] = '\0';
ret = nanogetstr(tabs, foo, def,
ret = nanogetstr(allowtabs, foo, def,
#ifndef NANO_SMALL
which_history,
#endif