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Basically:
find . -name '*.[ch]' | while read f; do perl -i.mmm -e \
'local $/;
local $_=<>;
s/log_(debug|info|notice|warning|error|emergency)\("([^"]*)%s"([^;]*),\s*strerror\(-?([->a-zA-Z_]+)\)\);/log_\1_errno(\4, "\2%m"\3);/gms;print;' \
$f; done
Plus manual indentation fixups.
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In show_all_names(), bus_map_all_properties() returns 1 on success which is
then used as the return code of show_all_names() and eventually main(). Exit
with zero in main() on all nonnegative results to guard against similar errors.
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to load from that
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"addresses"
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connected to a system or a user bus
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Also, make the call to free kdbus slices generic and use it everywhere
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Using:
find . -name '*.[ch]' | xargs sed -r -i -e \
's/log_unit_(debug|info|notice|warning|error|emergency)\(([^"]+), "(.*)%s"(.*), strerror\(-([a-zA-Z_]+)\)\);/log_unit_\1_errno(\2, \5, "\3%m"\4);/'
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It corrrectly handles both positive and negative errno values.
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As a followup to 086891e5c1 "log: add an "error" parameter to all
low-level logging calls and intrdouce log_error_errno() as log calls
that take error numbers", use sed to convert the simple cases to use
the new macros:
find . -name '*.[ch]' | xargs sed -r -i -e \
's/log_(debug|info|notice|warning|error|emergency)\("(.*)%s"(.*), strerror\(-([a-zA-Z_]+)\)\);/log_\1_errno(-\4, "\2%m"\3);/'
Multi-line log_*() invocations are not covered.
And we also should add log_unit_*_errno().
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It was not passing the error argument.
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This enables us to write things like this:
int open_some_file(void) {
fd = open("/dev/foobar", O_RDWR|O_CLOEXEC);
if (fd < 0)
return log_error_errno(errno, "Failed to reboot: %m");
return fd;
}
Which is function that returns -errno on failure, as well as printing an
error message, all in one line.
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in log_struct()
That way the caller may use %m to print the specified error.
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initialize it as such
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sd_bus_error_set_errno() allows negative errors too, hence, be equally
nice.
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Also, while we are at it, introduce some syntactic sugar for creating
ERRNO= and MESSAGE= structured logging fields.
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rest of the code
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kdbus eavesdropping was fixed!
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In principle SysV stuff is only for compatibility, but we are stuck
with it for the forseeable future, so documentation might as well
be provided.
https://bugs.debian.org/771172
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Broke with 086891e5c119abb9854237fc32e736fe2d67234c
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- Rename log_meta() → log_internal(), to follow naming scheme of most
other log functions that are usually invoked through macros, but never
directly.
- Rename log_info_object() to log_object_info(), simply because the
object should be before any other parameters, to follow OO-style
programming style.
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log_error_errno() as log calls that take error numbers
This change has two benefits:
- The format string %m will now resolve to the specified error (or to
errno if the specified error is 0. This allows getting rid of a ton of
strerror() invocations, a function that is not thread-safe.
- The specified error can be passed to the journal in the ERRNO= field.
Now of course, we just need somebody to convert all cases of this:
log_error("Something happened: %s", strerror(-r));
into thus:
log_error_errno(-r, "Something happened: %m");
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shouldn't confuse the empty list with unknown information
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kdbus
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- actually return permission errors to clients
- use the right ucreds field
- fix error paths when we cannot keep track of locally acquired names
due to OOM
- avoid unnecessary global variables
- log when the policy denies access
- enforce correct policy rule order
- always request all the metadata its we need to make decisions
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We got the following error when running systemd on a device with many ports:
"rtnl: kernel receive buffer overrun
Event source 'rtnl-receive-message' returned error, disabling: No buffer space
available"
I think the kernel socket receive buffer queue should be increased. The default
value is taken from:
"/proc/sys/net/core/rmem_default", but we can overwrite it using SO_RCVBUF
socket option.
This is already done in networkd for other sockets.
For example, the bus socket (sd-bus/bus-socket.c) has a receive queue of 8MB.
In our case, the default is 208KB.
Increasing the buffer receive queue for manager socket to 512KB should be enough
to get rid of the above error.
[tomegun: bump the limit even higher to 8M]
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