tree-wide: remove Emacs lines from all files This should be handled fine now by .dir-locals.el, so need to carry that stuff in every file.

journal-gatewayd: fix offset I was checking something when writing the patch and committed this by mistake.

journal-remote: update to 64bit µhttp api, provide fallback 64 bit offset is now accepted, which is nice. The old function is deprecated, and generates a compile time warning when used. We only use an offset of 0, so we really don't care. Adapt to use the new function, but fall back to the old one on older versions.

journal-remote: fix warning about deprecated µhttpd macro src/journal-remote/journal-remote.c:590:13: warning: Value MHD_HTTP_METHOD_NOT_ACCEPTABLE is deprecated, use MHD_HTTP_NOT_ACCEPTABLE return mhd_respond(connection, MHD_HTTP_METHOD_NOT_ACCEPTABLE, ^ The new define was added in 0.9.38. Instead of requiring the new libmicrohttpd version, provide the fallback, it is trivial.

journal-gatewayd: timeout journal wait to allow thread cleanup When a client connects with follow=1 and then disconnects we can get stuck in sd_journal_wait indefinitely if no journal messages are logged. Every time a client does this another thread is allocated and these continue to stack until either a journal message is logged or we run out of mapping to put a stack in. By adding a timeout if we don't see any journal messages in that timeout we will simply pop back out to microhttpd which will sanity check the connection for us and if it is still connected pop us back into the wait for more journal messages.

tree-wide: expose "p"-suffix unref calls in public APIs to make gcc cleanup easy GLIB has recently started to officially support the gcc cleanup attribute in its public API, hence let's do the same for our APIs. With this patch we'll define an xyz_unrefp() call for each public xyz_unref() call, to make it easy to use inside a __attribute__((cleanup())) expression. Then, all code is ported over to make use of this. The new calls are also documented in the man pages, with examples how to use them (well, I only added docs where the _unref() call itself already had docs, and the examples, only cover sd_bus_unrefp() and sd_event_unrefp()). This also renames sd_lldp_free() to sd_lldp_unref(), since that's how we tend to call our destructors these days. Note that this defines no public macro that wraps gcc's attribute and makes it easier to use. While I think it's our duty in the library to make our stuff easy to use, I figure it's not our duty to make gcc's own features easy to use on its own. Most likely, client code which wants to make use of this should define its own: #define _cleanup_(function) __attribute__((cleanup(function))) Or similar, to make the gcc feature easier to use. Making this logic public has the benefit that we can remove three header files whose only purpose was to define these functions internally. See #2008.

util-lib: split out allocation calls into alloc-util.[ch]

util-lib: split string parsing related calls from util.[ch] into parse-util.[ch]

util-lib: split out fd-related operations into fd-util.[ch] There are more than enough to deserve their own .c file, hence move them over.

journal: make sure to set MHD_USE_PIPE_FOR_SHUTDOWN for libmicrohttpd servers This makes sure libmicrohttpd won't call shutdown() on our listening sockets, which make sure socket activation and re-activation will work cleanly. See: https://github.com/systemd/systemd/pull/1286 https://lists.gnu.org/archive/html/libmicrohttpd/2015-09/msg00014.html Fixes #1286

util: introduce common version() implementation and use it everywhere This also allows us to drop build.h from a ton of files, hence do so. Since we touched the #includes of those files, let's order them properly according to CODING_STYLE.

util: introduce safe_fclose() and port everything over to it Adds a coccinelle script to port things over automatically.

tree-wide: drop {} from one-line if blocks Patch via coccinelle.

tree-wide: use coccinelle to patch a lot of code to use mfree() This replaces this: free(p); p = NULL; by this: p = mfree(p); Change generated using coccinelle. Semantic patch is added to the sources.

Bug #944: Deletion of unnecessary checks before a few calls of systemd functions The following functions return immediately if a null pointer was passed. * calendar_spec_free * link_address_free * manager_free * sd_bus_unref * sd_journal_close * udev_monitor_unref * udev_unref It is therefore not needed that a function caller repeats a corresponding check. This issue was fixed by using the software Coccinelle 1.0.1.

hostname-util: get rid of unused parameter of hostname_cleanup() All users are now setting lowercase=false.

journal-gatewayd: fix tmpfile logic "rw" is not a valid mode string for f*open(). This got broken in cc02a7b33049 ("journal-gatewayd: factor out opening of temp file").

util: split all hostname related calls into hostname-util.c

journal-gatewayd: use (void) to silence coverity CID #996297.

fix gcc warnings about uninitialized variables like: src/shared/install.c: In function ‘unit_file_lookup_state’: src/shared/install.c:1861:16: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] return r < 0 ? r : state; ^ src/shared/install.c:1796:13: note: ‘r’ was declared here int r; ^

journal-gatewayd: factor out opening of temp file Also use our own mkostemp wrapper, which tries to use O_TMPFILE.

µhttp-util: setup gnutls logs in one function

journal: install sigbus handler for journal tools too This makes them robust regarding truncation. Ideally, we'd export this as an API, but given how messy SIGBUS handling is, and the uncertain ownership logic of signal handlers we should not do this (unless libc one day invents a scheme how to sanely install SIGBUS handlers for specific memory areas only). However, for now we can still make all our own tools robust. Note that external tools will only have read-access to the journal anyway, where SIGBUS is much more unlikely, given that only writes are subject to disk full problems.

treewide: use log_*_errno whenever %m is in the format string If the format string contains %m, clearly errno must have a meaningful value, so we might as well use log_*_errno to have ERRNO= logged. Using: find . -name '*.[ch]' | xargs sed -r -i -e \ 's/log_(debug|info|notice|warning|error|emergency)\((".*%m.*")/log_\1_errno(errno, \2/' Plus some whitespace, linewrap, and indent adjustments.

treewide: more log_*_errno + return simplifications

treewide: no need to negate errno for log_*_errno() It corrrectly handles both positive and negative errno values.

treewide: auto-convert the simple cases to log_*_errno() 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().

Unify parse_argv style getopt is usually good at printing out a nice error message when commandline options are invalid. It distinguishes between an unknown option and a known option with a missing arg. It is better to let it do its job and not use opterr=0 unless we actually want to suppress messages. So remove opterr=0 in the few places where it wasn't really useful. When an error in options is encountered, we should not print a lengthy help() and overwhelm the user, when we know precisely what is wrong with the commandline. In addition, since help() prints to stdout, it should not be used except when requested with -h or --help. Also, simplify things here and there.

journal-remote: allow splitting incoming logs by source host Previously existing scheme where the file name would be based on the source was just too ugly and unpredicatable. Now there are only two options: 1. just one file (until rotation), 2. one file per source host, using the hostname as filename part. For the cases where the source is specified by the user, only option one is allowed, and the full of the file must be specified.

Move network-related journal programs to src/journal-remote/ Directory src/journal has become one of the largest directories, and since systemd-journal-gatewayd, systemd-journal-remote, and forthcoming systemd-journal-upload are all closely related, create a separate directory for them.