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misc.c open_pathfmt caller supplied buffer

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Amachronic raised concern about open() blocking causing a static buf
to get overwritten in multiple calls its prudent to just have the caller
supply the buffer to minimize stack issues later

Change-Id: Iae27c7d063adb1a65688f920f6aa5c395fa5694a
This commit is contained in:
William Wilgus 2022-11-23 21:46:13 -05:00
parent 80b8b13544
commit 3745c813f9
9 changed files with 34 additions and 27 deletions
Download patch file Download diff file Expand all files Collapse all files

12
apps/bookmark.c
View file

@ -290,10 +290,8 @@ static bool add_bookmark(const char* bookmark_file_name, const char* bookmark,
bool equal;
/* Opening up a temp bookmark file */
snprintf(global_temp_buffer, sizeof(global_temp_buffer),
"%s.tmp", bookmark_file_name);
temp_bookmark_file = open(global_temp_buffer,
O_WRONLY | O_CREAT | O_TRUNC, 0666);
temp_bookmark_file = open_pathfmt(global_temp_buffer, sizeof(global_temp_buffer),
O_WRONLY | O_CREAT | O_TRUNC, "%s.tmp", bookmark_file_name);
if (temp_bookmark_file < 0)
return false; /* can't open the temp file */
@ -893,10 +891,8 @@ static bool delete_bookmark(const char* bookmark_file_name, int bookmark_id)
int bookmark_count = 0;
/* Opening up a temp bookmark file */
snprintf(global_temp_buffer, sizeof(global_temp_buffer),
"%s.tmp", bookmark_file_name);
temp_bookmark_file = open(global_temp_buffer,
O_WRONLY | O_CREAT | O_TRUNC, 0666);
temp_bookmark_file = open_pathfmt(global_temp_buffer, sizeof(global_temp_buffer),
O_WRONLY | O_CREAT | O_TRUNC, "%s.tmp", bookmark_file_name);
if (temp_bookmark_file < 0)
return false; /* can't open the temp file */

3
apps/debug_menu.c
View file

@ -2307,8 +2307,9 @@ static bool cpu_boost_log_dump(void)
return false;
#if CONFIG_RTC
char fname[MAX_PATH];
struct tm *nowtm = get_time();
fd = open_pathfmt(O_CREAT|O_WRONLY|O_TRUNC,
fd = open_pathfmt(fname, sizeof(fname), O_CREAT|O_WRONLY|O_TRUNC,
"%s/boostlog_%04d%02d%02d%02d%02d%02d.txt", ROCKBOX_DIR,
nowtm->tm_year + 1900, nowtm->tm_mon + 1, nowtm->tm_mday,
nowtm->tm_hour, nowtm->tm_min, nowtm->tm_sec);

9
apps/filetypes.c
View file

@ -325,8 +325,8 @@ void read_color_theme_file(void) {
if (!global_settings.colors_file[0] || global_settings.colors_file[0] == '-')
return;
fd = open_pathfmt(O_RDONLY, THEME_DIR "/%s.colours",
global_settings.colors_file);
fd = open_pathfmt(buffer, sizeof(buffer), O_RDONLY,
THEME_DIR "/%s.colours", global_settings.colors_file);
if (fd < 0)
return;
while (read_line(fd, buffer, MAX_PATH) > 0)
@ -365,10 +365,11 @@ void read_viewer_theme_file(void)
custom_filetype_icons[i] = filetypes[i].icon;
}
fd = open_pathfmt(O_RDONLY, "%s/%s.icons", ICON_DIR,
global_settings.viewers_icon_file);
fd = open_pathfmt(buffer, sizeof(buffer), O_RDONLY,
ICON_DIR "/%s.icons", global_settings.viewers_icon_file);
if (fd < 0)
return;
while (read_line(fd, buffer, MAX_PATH) > 0)
{
if (!settings_parseline(buffer, &ext, &icon))

4
apps/gui/icon.c
View file

@ -182,7 +182,9 @@ static void load_icons(const char* filename, enum Iconset iconset,
ic->handle = 0;
if (filename[0] && filename[0] != '-')
{
fd = open_pathfmt(O_RDONLY, ICON_DIR "/%s.bmp", filename);
char fname[MAX_PATH];
fd = open_pathfmt(fname, sizeof(fname), O_RDONLY,
ICON_DIR "/%s.bmp", filename);
if (fd < 0)
return;
buf_size = read_bmp_fd(fd, &ic->bmp, 0,

3
apps/logfdisp.c
View file

@ -225,8 +225,9 @@ bool logfdump(void)
logfenabled = false;
#if CONFIG_RTC
char fname[MAX_PATH];
struct tm *nowtm = get_time();
fd = open_pathfmt(O_CREAT|O_WRONLY|O_TRUNC,
fd = open_pathfmt(fname, sizeof(fname), O_CREAT|O_WRONLY|O_TRUNC,
"%s/logf_%04d%02d%02d%02d%02d%02d.txt", ROCKBOX_DIR,
nowtm->tm_year + 1900, nowtm->tm_mon + 1, nowtm->tm_mday,
nowtm->tm_hour, nowtm->tm_min, nowtm->tm_sec);

5
apps/misc.c
View file

@ -1419,12 +1419,11 @@ int string_option(const char *option, const char *const oplist[], bool ignore_ca
}
/* open but with a builtin printf for assembling the path */
int open_pathfmt(int oflag, const char *pathfmt, ...)
int open_pathfmt(char *buf, size_t size, int oflag, const char *pathfmt, ...)
{
static char buf[MAX_PATH];
va_list ap;
va_start(ap, pathfmt);
vsnprintf(buf, sizeof(buf), pathfmt, ap);
vsnprintf(buf, size, pathfmt, ap);
va_end(ap);
return open(buf, oflag, 0666);
}

2
apps/misc.h
View file

@ -122,7 +122,7 @@ extern int show_logo(void);
#define BOM_UTF_16_SIZE 2
int split_string(char *str, const char needle, char *vector[], int vector_length);
int open_pathfmt(int oflag, const char *pathfmt, ...);
int open_pathfmt(char *buf, size_t size, int oflag, const char *pathfmt, ...);
int open_utf8(const char* pathname, int flags);
int string_option(const char *option, const char *const oplist[], bool ignore_case);

15
apps/tagcache.c
View file

@ -423,11 +423,13 @@ static int open_tag_fd(struct tagcache_header *hdr, int tag, bool write)
{
int fd;
int rc;
char fname[MAX_PATH];
if (TAGCACHE_IS_NUMERIC(tag) || tag < 0 || tag >= TAG_COUNT)
return -1;
fd = open_pathfmt(write ? O_RDWR : O_RDONLY, TAGCACHE_FILE_INDEX, tag);
fd = open_pathfmt(fname, sizeof(fname),
write ? O_RDWR : O_RDONLY, TAGCACHE_FILE_INDEX, tag);
if (fd < 0)
{
@ -803,7 +805,9 @@ static bool open_files(struct tagcache_search *tcs, int tag)
{
if (tcs->idxfd[tag] < 0)
{
tcs->idxfd[tag] = open_pathfmt(O_RDONLY, TAGCACHE_FILE_INDEX, tag);
char fname[MAX_PATH];
tcs->idxfd[tag] = open_pathfmt(fname, sizeof(fname),
O_RDONLY, TAGCACHE_FILE_INDEX, tag);
}
if (tcs->idxfd[tag] < 0)
@ -1584,7 +1588,8 @@ bool tagcache_search_add_clause(struct tagcache_search *tcs,
if (!TAGCACHE_IS_NUMERIC(clause->tag) && tcs->idxfd[clause->tag] < 0)
{
tcs->idxfd[clause->tag] = open_pathfmt(O_RDONLY,
char fname[MAX_PATH];
tcs->idxfd[clause->tag] = open_pathfmt(fname, sizeof(fname), O_RDONLY,
TAGCACHE_FILE_INDEX, clause->tag);
}
}
@ -2743,7 +2748,7 @@ static int build_index(int index_type, struct tagcache_header *h, int tmpfd)
* Creating new index file to store the tags. No need to preload
* anything whether the index type is sorted or not.
*/
fd = open_pathfmt(O_WRONLY | O_CREAT | O_TRUNC,
fd = open_pathfmt(buf, bufsz, O_WRONLY | O_CREAT | O_TRUNC,
TAGCACHE_FILE_INDEX, index_type);
if (fd < 0)
{
@ -4401,7 +4406,7 @@ static bool check_deleted_files(void)
logf("reverse scan...");
fd = open_pathfmt(O_RDONLY, TAGCACHE_FILE_INDEX, tag_filename);
fd = open_pathfmt(buf, bufsz, O_RDONLY, TAGCACHE_FILE_INDEX, tag_filename);
if (fd < 0)
{
logf(TAGCACHE_FILE_INDEX " open fail", tag_filename);

4
apps/talk.c
View file

@ -247,6 +247,7 @@ static struct buflib_callbacks talk_ops = {
static int open_voicefile(void)
{
char fname[MAX_PATH];
char* p_lang = DEFAULT_VOICE_LANG; /* default */
if ( global_settings.lang_file[0] &&
@ -255,7 +256,8 @@ static int open_voicefile(void)
p_lang = (char *)global_settings.lang_file;
}
return open_pathfmt(O_RDONLY, LANG_DIR "/%s.voice", p_lang);
return open_pathfmt(fname, sizeof(fname),
O_RDONLY, LANG_DIR "/%s.voice", p_lang);
}