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2016-05-24Udevadm trivial cleanups (#3331)Zbigniew Jędrzejewski-Szmek
* udevadm-info: use _cleanup_ * udevadm-info: propagate return value from export_devices() * sd-device: add comment and remove unnecessary braces
2016-05-23sd-device: udev-db - handle properties with empty value (#3330)Tom Gundersen
The statemachine was unable to parse properties with empty values, reported in [0]. When reaching the start of the KEY, we would unconditionally read one more character before starting to look for the end-of-line. Simply look for the end-of-line from the first character. [0]: <https://bugzilla.redhat.com/show_bug.cgi?id=1338823>
2016-04-21tree-wide: use mdash instead of a two minusesZbigniew Jędrzejewski-Szmek
2016-04-06sd-device: Allocate enough room for tags stringMartin Pitt
Fix commit 1d88a2: We need to allocate another byte for building the "tags" string, as we append an extra ':' and still need the NUL terminator.
2016-04-05sd-device: fix crash if a device has many tags or devlinksMartin Pitt
strjoina() is unsafe to be used in an unbounded loop as alloca() has no error reporting. Thus devices with a large number of tags or devlinks trigger a segfault in device_properties_prepare() due to overflowing the stack. Rewrite the building of the "tags" and "devlinks" strings using GREEDY_REALLOC() and strpcpy() to work with arbitrarily long strings. This also avoids re-copying the entire string in each loop iteration. Before this commit we always appended one final ":" to "tags". Change this to start with an iniital ":" and for each tag append instead of prepend a ":". This unifies what happens for the first and all subsequent tags so that we can use a for loop. Fixes #2954
2016-02-22tree-wide: make ++/-- usage consistent WRT spacingVito Caputo
Throughout the tree there's spurious use of spaces separating ++ and -- operators from their respective operands. Make ++ and -- operator consistent with the majority of existing uses; discard the spaces.
2016-02-22Merge pull request #2685 from poettering/lldp-fixes2Tom Gundersen
lldp fixes, second iteration
2016-02-20sd-device: use (void) before set_iterate callsZbigniew Jędrzejewski-Szmek
set_iterate sets the output argument to NULL on error, and the return value is not used in this case. CID #1306804-09.
2016-02-20tree-wide: place #pragma once at the same place everywhereLennart Poettering
Usually, we place the #pragma once before the copyright blurb in header files, but in a few cases we didn't. Move those around, so that we do the same thing everywhere.
2016-02-10tree-wide: remove Emacs lines from all filesDaniel Mack
This should be handled fine now by .dir-locals.el, so need to carry that stuff in every file.
2016-01-18sd-device: initialize variables to avoid warningZbigniew Jędrzejewski-Szmek
The code is correct, assuming that the kernel does not feed us garbled data. Let's initialize those variables to avoid the warning anyway.
2015-11-27tree-wide: expose "p"-suffix unref calls in public APIs to make gcc cleanup easyLennart Poettering
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.
2015-11-03parse-util: introduce parse_ifindex() and make use of it everywhereLennart Poettering
We have enough places where we parse an ifindex, hence introduce a proper parsing function for it, that verifies all parameters.
2015-10-27util-lib: split out allocation calls into alloc-util.[ch]Lennart Poettering
2015-10-27user-util: move UID/GID related macros from macro.h to user-util.hLennart Poettering
2015-10-27util-lib: move string table stuff into its own string-table.[ch]Lennart Poettering
2015-10-27util-lib: split stat()/statfs()/stavfs() related calls into stat-util.[ch]Lennart Poettering
2015-10-27util-lib: move a number of fs operations into fs-util.[ch]Lennart Poettering
2015-10-27util-lib: introduce dirent-util.[ch] for directory entry callsLennart Poettering
Also, move a couple of more path-related functions to path-util.c.
2015-10-27util-lib: split string parsing related calls from util.[ch] into parse-util.[ch]Lennart Poettering
2015-10-26build-sys: add missing makefile symlinkLennart Poettering
2015-10-25util-lib: split out fd-related operations into fd-util.[ch]Lennart Poettering
There are more than enough to deserve their own .c file, hence move them over.
2015-10-24util-lib: split our string related calls from util.[ch] into its own file ↵Lennart Poettering
string-util.[ch] There are more than enough calls doing string manipulations to deserve its own files, hence do something about it. This patch also sorts the #include blocks of all files that needed to be updated, according to the sorting suggestions from CODING_STYLE. Since pretty much every file needs our string manipulation functions this effectively means that most files have sorted #include blocks now. Also touches a few unrelated include files.
2015-10-06libsystemd: sd-device - translate / vs. ! in sysnameKay Sievers
The kernel replaces '/' in device names with '!', we translate that back to '/' in sysname, when taking sysname as input, we should translate it back again.
2015-10-01sd-device: fix format strings after conversion to log_*_errno()Michal Schmidt
Use %m where previously %s was used together with strerrno(). Fixes: e53fc357a9b "tree-wide: remove a number of invocations of strerror() and replace by %m"
2015-10-01tree-wide: add missing errno arguments to log_*_errno()Michal Schmidt
A few of the recent conversions to log_*_errno() were missing the errno value arguments. Fixes: e53fc357a9b "tree-wide: remove a number of invocations of strerror() and replace by %m"
2015-09-30tree-wide: remove a number of invocations of strerror() and replace by %mLennart Poettering
Let's clean up our tree a bit, and reduce invocations of the thread-unsafe strerror() by replacing it with printf()'s %m specifier.
2015-08-22sd-device: fix enumeration of devices without subsystemMaxim Mikityanskiy
Prior to commit c32eb440bab953a0169cd207dfef5cad16dfb340, libudev's function udev_enumerate_scan_devices() had behaved differently. If parent match was added with udev_enumerate_add_match_parent(), udev_enumerate_scan_devices() did not return error if some child devices had no subsystem symlink in sysfs. An example of such devices is USB endpoints /sys/bus/usb/devices/*/ep_*. If there was a parent match against USB device, old implementation of udev_enumerate_scan_devices() did not treat ep_* device directories without subsystem symlink as error and just ignored them, but new implementation returns -ENOENT (also ignoring these devices) though correctly enumerates all other matching devices. To compare, you could look at 96df036fe3d25525a44f5efdb2fc8560e82e6cfd, in src/libudev/libudev-enumerate.c, function parent_add_child(): if (!match_subsystem(enumerate, udev_device_get_subsystem(dev))) goto nomatch; udev_device_get_subsystem() was returning NULL, match_subsystem() was returning false, and USB endpoint device was ignored. New parent_add_child() from src/libsystemd/sd-device/device-enumerator.c checks return value of sd_device_get_subsystem() and fails if subsystem was not found. Absence of subsystem symlink should not be really treated as error because all enumerations of children of USB devices will fail with -ENOENT. This new behavior also breaks system-config-printer. So restore old behavior and treat absence of subsystem symlink as no match.
2015-07-29tree-wide: port everything over to fflush_and_check()Lennart Poettering
Some places invoked fflush() directly with their own manual error checking, let's unify all that by using fflush_and_check(). This also unifies the general error paths of fflush()+rename() file writers.
2015-07-15sd-device: never return NULL+0David Herrmann
It is highly confusing if a getter function returns 0, but the value is set to NULL. This, right now, triggers assertions as code relies on the returned values to be non-NULL. Like with sd-bus-creds and friends, return 0 only if a value is actually available. Discussed with Tom, and actually fixes real bugs as in #512.
2015-06-14hashmap: fix iterators to not skip entriesDavid Herrmann
Currently, the HASHMAP iterators stop at the first NULL entry in a hashmap. This is non-obvious and breaks users like sd-device, which legitimately store NULL values in a hashmap. Fix all the iterators by taking a pointer to the value storage, instead of returning it. The iterators now return a boolean that tells whether the end of the list was reached. Current users of HASHMAP_FOREACH() are *NOT* changed to explicitly check for NULL. If it turns out, there were users that inserted NULL into hashmaps, but didn't properly check for it during iteration, then we really want to find those and fix them.
2015-06-03libudev: enumerate - accept NULL parameters in add_match()Tom Gundersen
This was a regression introduced when moving to sd-device.
2015-06-02fix double semicolon typoThomas Hindoe Paaboel Andersen
2015-06-02sd-device: get_driver - remember if a device does not have a driverTom Gundersen
Don't try to read it again.
2015-06-02sd-device: get_subsystem - don't complain if a device does not have a subsystemTom Gundersen
2015-06-01sd-device: ensure update_properties_buf() is a noop on failureTom Gundersen
Don't clobber the sd_device struct, and don't leak memory when memory allocation fails.
2015-06-01sd-device: fix invalid property strv pointersMartin Pitt
In device_update_properties_bufs(), the strv is built from pointers into the single nul-terminated buf_nulstr string, to avoid allocating the key=value strings twice. However, we must not do that while building and GREEDY_REALLOC0()'ing buf_nulstr, as each time when this actually reallocates memory the pointers we wrote into buf_strv so far become invalid. So change the logic to first completely build the new buf_nulstr, and then iterate over it to pick out the pointers to the individual key=value strings for properties_strv. This fixes invalid environment for udev callouts.
2015-05-28sd-device: enumerator - fix matching on properties and sysattrsTom Gundersen
This was a regression that broke $ udevadm trigger -nv --property-match=DEVNAME=/dev/sda1 --attr-match=size=409600 Reported by David Reisner.
2015-05-27sd-device: fix device_get_properties_strv()Tom Gundersen
A NULL pointer was inserted as the first element of the strv. This had the effect of always passing the empty environment to processes spawned by udev. Reported by Michał Bartoszkiewicz.
2015-05-20sd-device: fix return codes on errorZbigniew Jędrzejewski-Szmek
asprintf() does not set errno.
2015-04-26sd-device: don't retry loading uevent/db files more than onceTom Gundersen
If for whatever reason there was nothing to load or loading failed, don't keep trying.
2015-04-26sd-device: don't complain if the uevent file is missingTom Gundersen
Only 'real' devices are required to have an uevent file.
2015-04-23udevd: fix REMOVE handlingTom Gundersen
This reverts b67f944. Lazy loading of device properties does not work for devices that are received over netlink, as these are sealed. Reinstate the unconditional loading of the device db. Reported by: Mantas Mikulėnas <grawity@gmail.com>.
2015-04-21sd-device: set_syspath - return ENODEV when passed something that is not a ↵Tom Gundersen
device
2015-04-17sd-device: simplify enumerator hacksDavid Herrmann
Boolean arithmetic is great, use it! if (a && !b) return 1; if (!a && b) return -1, is equivalent to if (a != b) return a - b; Furthermore: r = false; if (condition) r = true; is equivalent to: r = condition;
2015-04-17sd-device: uniformly handle missing devicesTom Gundersen
sd_device_new_from_* now returns -ENODEV when the device does not exist, and the enumerator silently drops these errors as missing devices is exepected.
2015-04-17sd-device: enumerator - match only on initialized devices by defaultTom Gundersen
It is still possible to include uninitialized ones, but now that is opt-in. In most cases people only want initialized devices. Exception is if you want to work without udev running. Suggested by David Herrmann.
2015-04-17sd-device: enumerator - don't expose add_device()Tom Gundersen
This is rarely, if ever, used. Drop it from the new public API and only keep it for the legacy API. Suggested by David Herrmann.
2015-04-16sd-device: add device-enumerator libraryTom Gundersen
2015-04-14sd-device: fix typoZbigniew Jędrzejewski-Szmek