From 21a24c3bf35bac83d66ce4a48eb0c7dd8a7227cb Mon Sep 17 00:00:00 2001 From: Rob Clark Date: Sat, 9 Sep 2017 13:15:59 -0400 Subject: fs/fat: fix case for FAT shortnames MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Noticed when comparing our output to linux. There are some lcase bits which control whether filename and/or extension should be downcase'd. Signed-off-by: Rob Clark Reviewed-by: Łukasz Majewski Reviewed-by: Simon Glass --- fs/fat/fat.c | 16 ++++++++++------ fs/fat/fat_write.c | 4 ++-- 2 files changed, 12 insertions(+), 8 deletions(-) (limited to 'fs') diff --git a/fs/fat/fat.c b/fs/fat/fat.c index c951d84f57..65873a2c2a 100644 --- a/fs/fat/fat.c +++ b/fs/fat/fat.c @@ -29,11 +29,13 @@ static const int vfat_enabled = 0; #endif /* - * Convert a string to lowercase. + * Convert a string to lowercase. Converts at most 'len' characters, + * 'len' may be larger than the length of 'str' if 'str' is NULL + * terminated. */ -static void downcase(char *str) +static void downcase(char *str, size_t len) { - while (*str != '\0') { + while (*str != '\0' && len--) { *str = tolower(*str); str++; } @@ -131,10 +133,13 @@ static void get_name(dir_entry *dirent, char *s_name) ptr = s_name; while (*ptr && *ptr != ' ') ptr++; + if (dirent->lcase & CASE_LOWER_BASE) + downcase(s_name, (unsigned)(ptr - s_name)); if (dirent->ext[0] && dirent->ext[0] != ' ') { - *ptr = '.'; - ptr++; + *ptr++ = '.'; memcpy(ptr, dirent->ext, 3); + if (dirent->lcase & CASE_LOWER_EXT) + downcase(ptr, 3); ptr[3] = '\0'; while (*ptr && *ptr != ' ') ptr++; @@ -144,7 +149,6 @@ static void get_name(dir_entry *dirent, char *s_name) *s_name = '\0'; else if (*s_name == aRING) *s_name = DELETED_FLAG; - downcase(s_name); } static int flush_dirty_fat_buffer(fsdata *mydata); diff --git a/fs/fat/fat_write.c b/fs/fat/fat_write.c index 4ca024c208..d0468baf8f 100644 --- a/fs/fat/fat_write.c +++ b/fs/fat/fat_write.c @@ -345,7 +345,7 @@ get_long_file_name(fsdata *mydata, int curclust, __u8 *cluster, *l_name = '\0'; else if (*l_name == aRING) *l_name = DELETED_FLAG; - downcase(l_name); + downcase(l_name, INT_MAX); /* Return the real directory entry */ *retdent = realdent; @@ -981,7 +981,7 @@ static int do_fat_write(const char *filename, void *buffer, loff_t size, memcpy(l_filename, filename, name_len); l_filename[name_len] = 0; /* terminate the string */ - downcase(l_filename); + downcase(l_filename, INT_MAX); startsect = mydata->rootdir_sect; retdent = find_directory_entry(mydata, startsect, -- cgit v1.2.3