On Tue, Feb 26, 2013 at 02:20:30PM -0600, Eric Sandeen wrote:
> The coverity runs had a false positive complaining that save_ptr
> is uninitialized in the call to strtok_r.
>
> We could initialize it, but Zach points out that just using
> strsep is a lot simpler if there's only one delimiter,
> so just switch to that.
>
> Signed-off-by: Eric Sandeen <sand...@redhat.com>
> ---
>
> V2: Remove accidentally-added debug printfs, thanks Geoffredo!
>
> diff --git a/cmds-balance.c b/cmds-balance.c
> index b671e1d..cfbb8eb 100644
> --- a/cmds-balance.c
> +++ b/cmds-balance.c
> @@ -67,11 +67,8 @@ static int parse_one_profile(const char *profile, u64
> *flags)
> static int parse_profiles(char *profiles, u64 *flags)
> {
> char *this_char;
> - char *save_ptr;
>
> - for (this_char = strtok_r(profiles, "|", &save_ptr);
> - this_char != NULL;
> - this_char = strtok_r(NULL, "|", &save_ptr)) {
> + while ((this_char = strsep(&profiles, "|"))) {
> if (parse_one_profile(this_char, flags))
> return 1;
> }
> @@ -136,14 +133,11 @@ static int parse_filters(char *filters, struct
> btrfs_balance_args *args)
> {
> char *this_char;
> char *value;
> - char *save_ptr;
>
> if (!filters)
> return 0;
>
> - for (this_char = strtok_r(filters, ",", &save_ptr);
> - this_char != NULL;
> - this_char = strtok_r(NULL, ",", &save_ptr)) {
> + while ((this_char = strsep(&filters , ","))) {
^^^ whitespace
One of the differences between strtok() and strsep() is that the former
allows multiple delimiters between two tokens. With strsep(), this
btrfs balance -dfoo1=bar1,,,foo2=bar2 <mnt>
fails with error, whereas with strtok() it passes. I don't have a
strong opinion here (this has been loosely modeled on the way mount(8)
handles -o options), but might it be better to just initialize save_ptr?
(And yes, I know that strsep() is better ;))
Thanks,
Ilya
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