This uses the same logic as similar verb suggestion for command line
utilities. Try to be helpful when the user entered something invalid
instead of just showing the prompt again.
The macro didn't properly parenthesize a caller-controlled argument.
For example: `STRV_FOREACH_PAIR(a, b, something ?: something_else)`
would expand to `typeof(*something ?: something_else)`, which would
cause compile failures
Follow-up for 6d2984d21b
The current semantics of "filtered" in unit_is_filtered()
are actually the contrary of ListUnitsFiltered(). Let's
make things consistent, i.e. return true when the unit
shall be included.
Also, use the more correct type of 'const char* const*' for the input strv.
This requires adding the cast in a few places, but also allows to remove some
casts in others.
This is the function version of STARTSWITH_SET(). We also move
STARTSWITH_SET() to string-util.h as it fits more there than in
strv.h and reimplement it using startswith_strv().
The second argument to _printf_() specifies where the arguments start. We need to
use 0 in two cases: when the args in a va_list and can't be checked, and with journald
logging functions which accept multiple format strings with multiple argument sets,
which the _printf_ checker does not understand. But strv_extendf() can be checked.
This will be helpful in cases where we are repeatedly adding entries
to a long strv and want to skip the iteration over old entries leading
to quadratic behaviour.
Note that we don't want to calculate the length if not necessary, so
the calculation is delayed until after we've checked that value is not
NULL.
Plain strv_split() should not care if the strings contains backslashes
or quote characters. But extract_first_word() interprets backslashes
unless EXTRACT_RETAIN_ESCAPE is given.
I wonder how it's possible that nobody noticed this before. I think this
code was introduced in 0645b83a40.
Same idea as 03677889f0.
No functional change intended. The type of the iterator is generally changed to
be 'const char*' instead of 'char*'. Despite the type commonly used, modifying
the string was not allowed.
I adjusted the naming of some short variables for clarity and reduced the scope
of some variable declarations in code that was being touched anyway.
"""
Given an array a[N] of N elements of type T:
- Forming a pointer &a[i] (or a + i) with 0 ≤ i ≤ N is safe.
- Forming a pointer &a[i] with i < 0 or i > N causes undefined behavior.
- Dereferencing a pointer &a[i] with 0 ≤ i < N is safe.
- Dereferencing a pointer &a[i] with i < 0 or i ≥ N causes undefined behavior.
"""
As pointed by by @medhefgo, here we were forming a pointer to a[-1]. a itself
wasn't NULL, so a > 0, and a-1 was also >= 0, and this didn't seem to cause any
problems. But it's better to be formally correct, especially if we move the
code to src/fundamental/ later on and compile it differently.
Compilation shows no size change (with -O0 -g) on build/systemd, so this should
have no effect whatsoever.
I think the function name is confusing: we generally say "free_free" when
both keys and values are freed in a hash map, but here the type is an
array of strvs, so the name should be something like strv_array_free.
The function is unused since 143fadf369 (2018),
let's just drop it.
Mike Yuan
Lennart Poettering
Yu Watanabe
Michael Ferrari
Adrian Vovk
Luca Boccassi
Zbigniew Jędrzejewski-Szmek
Ludwig Nussel
Daan De Meyer
Frantisek Sumsal
Jan Janssen