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The term “positive” is often read to exclude 0 (though “strictly
positive” is sometimes used to clarify this), so let’s explicitly state
that --lines=0 is legal and completely disables journal output.
Motivated by an answer on StackExchange [1].
[1]: https://unix.stackexchange.com/a/475068/44049
This is actually a u16, not a u32, so the kernel complains:
kernel: netlink: 'systemd-network': attribute type 5 has an invalid length
This is due to:
if (nla_attr_len[pt->type] && attrlen != nla_attr_len[pt->type]) {
pr_warn_ratelimited("netlink: '%s': attribute type %d has an invalid length.\n",
current->comm, type);
}
Presumably this has been working fine in functionality on little-endian
systems, but nobody bothered to try on big-endian systems.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
coverity message:
sign_extension: Suspicious implicit sign extension: "keydata.Key.ScanCode" with type "UINT16" (16 bits, unsigned) is promoted in "keydata.Key.ScanCode << 16" to type "int" (32 bits, signed), then sign-extended to type "unsigned long" (64 bits, unsigned). If "keydata.Key.ScanCode << 16" is greater than 0x7FFFFFFF, the upper bits of the result will all be 1.
These man pages list references to the various sd_event_add_xyz() calls
at the bottom, but sd_event_add_inotify() was never added there.
Moreover, some list references to sd_event_add_post() and
sd_event_add_exit() even though these have shared man pages with
sd_event_add_defer(), and given that the "SEE ALSO" section should
probably reference pages instead of functions let's drop this.
Then, let's always specify the sd_event_add_xyz() calls in the same
order.
Finally, in the sd_event_new(3) text explaining the basic logic,
actually mention sd_event_add_post() and sd_event_add_exit() as well, as
in that case we actually want to list functions, not man pages.
This makes use of assert_cc() to guard against missing CASE macros,
instead of a manual implementation that might result in a static
variable to be allocated.
More importantly though this changes the base type for the array used to
determine the number of arguments for the compile time check from "int"
to "long double". This is done in order to avoid warnings from "ubsan"
that possibly large constants are assigned to small types. "long double"
hopefully isn't vulnerable to that.
Fixes: #10332
Also, while we are at it, beef it up, by adding json-seq support (i.e.
https://tools.ietf.org/html/rfc7464). This is particularly useful in
conjunction with jq's --seq switch.
This reverts commit 56f56d5ad8.
This broke the compilation for coverity under travis. Our build script does
something like this:
$ CFLAGS='-D_Float128=long\ double -D_Float64=double -D_Float64x=long\ double -D_Float32=float -D_Float32x=double' meson cov-build -Dman=false
$ ninja -C build
...
[pid 27096] execve("/usr/bin/cc", ["/usr/bin/cc", "-D_Float128=long", "double", "-D_Float64=double", "-D_Float64x=long", "double", "-D_Float32=float", "-D_Float32x=double", "-E", "-dM", "-include", "linux/capability.h", "-include", "config.h", "-include", "../src/basic/missing.h", "-"], 0x55ab75ea4e80 /* 91 vars */) = 0
cc: error: double: No such file or directory
cc: error: double: No such file or directory
[pid 27096] +++ exited with 1 +++
I'm sure this could be fixed somehow, but since the original motivation for
56f56d5ad8 wasn't very strong, let's just revert
it as this seems to be the simplest solution.
If a memory error occurred, we would still go through the path which sets the
error on ferror(). It is unlikely that ferror() returns true, but it's seems
cleaner to just propagate the error we already have.
The handling of fgets() returning NULL is also simplified: according to the man
page, it returns NULL only on EOF or error. So if feof() returns true, I don't
think we should call ferror() again.
While at it, let's set errno to 0 and check that it is set before returning it
as an error. The man pages for fgets() and feof() do not say anything about
setting errno.
Here the behaviour is nominally changed, because we will decrease the
counter on error. But the only caller quits the program if error occurs,
so this makes no practical difference.
