[PATCH 0/3] btrfs-progs: fix dropped 'const' qualifiers exposed by the latest GCC (15.2.1)

[Qu Wenruo <wqu@suse.com>]

It looks lile the latest gcc has taken the 'const' qualifier checks one
step further, a char pointer that points into a string that has 'const'
qualifier should also has 'const'.

This will expose unexpected modification like the following:

 void my_func(const char *options)
 {
         char *dot;

         dot = strchr(options, '.');
         if (!dot)
                 *dot = '\0';
 }

In above example, @dot is either NULL or points to a location inside
@options. For the later case, since @dot itself is not const, we can
modify the content, resulting modification of the content of @options.
The latest GCC is able to detect such proxy modification and gives us
warning on them.

And in fact, btrfs-progs has exactly such proxied modification in
bconf_save_param(), fixed in the last patch by dropping the 'const'
quailifer.

Other than that, most are just false alerts and we can fix them by
adding a const quailifer.

Qu Wenruo (3):
  btrfs-progs: enhance find_option()
  btrfs-progs: constify the @dots variable inside parse_range_u64()
  btrfs-progs: drop the 'const' qualifier from bconf_save_param()

 common/parse-utils.c |  4 ++--
 common/utils.c       | 24 ++++++++++++++++++------
 common/utils.h       |  2 +-
 3 files changed, 21 insertions(+), 9 deletions(-)

--
2.53.0