This adds json_dispatch_const_string() which is similar to
json_dispatch_string() but doesn't store a strdup()'ed copy of the
string, but a pointer directly into the JSON record.
This should simplify cases where the json variant sticks around long
enough anyway.
Let's add a concept of normalization: as preparation for signing json
records let's add a mechanism to bring JSON records into a well-defined
order so that we can safely validate JSON records.
This adds two booleans to each JsonVariant object: "sorted" and
"normalized". The latter indicates whether a variant is fully sorted
(i.e. all keys of objects listed in alphabetical order) recursively down
the tree. The former is a weaker property: it only checks whether the
keys of the object itself are sorted. All variants which are
"normalized" are also "sorted", but not vice versa.
The knowledge of the "sorted" property is then used to optimize
searching for keys in the variant by using bisection.
Both properties are determined at the moment the variants are allocated.
Since our objects are immutable this is safe.
This will call json_variant_sensitive() internally while parsing for
each allocated sub-variant. This is better than calling it a posteriori
at the end, because partially parsed variants will always be properly
erased from memory this way.
An object marked with this flag will be erased from memory when it is
freed. This is useful for dealing with sensitive data (key material,
passphrases) encoded in JSON objects.
usually we want to create new files with mode 0666 (modulated by the
umask). Sometimes we want more restrictive access though, let's add an
explicit flag support for that.
(Note that we don't bother with arbitrary access modes to keep things
simple: just "open as umask permits" and "private to me", nothing else)
This adds xfopenat() which is to fopen() what xopendirat() is to
opendir(), i.e. the "at" counterpart to fopen().
(Similar to the xopendir() case, we prefix this with "x", in case libc
gains this natively eventually.)
Let's make sure we get back to 100% man page documentation coverage of
our sd-event APIs. We are bad enough at the others, let's get these ones
right at least.
Lennart Poettering
Michael Biebl
Zbigniew Jędrzejewski-Szmek
afg
Yu Watanabe
Jan Tojnar