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path: root/src/shared/path-util.c
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2015-06-11build-sys: split internal basic/ library from shared/Kay Sievers
basic/ can be used by everything cannot use anything outside of basic/ libsystemd/ can use basic/ cannot use shared/ shared/ can use libsystemd/
2015-06-09path-util: Fix path_is_mount_point for parent mount points in symlink modeMartin Pitt
When we have a structure like this: /bin -> /usr/bin /usr is a mount point Then path_is_mount_point("/bin", AT_SYMLINK_FOLLOW) needs to look at the pair /usr/bin and /usr, not at the pair / and /usr/bin, as the latter have different mount IDs. But we only want to consider the base name, not any parent. Thus we have to resolve the given path first to get the real parent when allowing symlinks. Bug: https://github.com/systemd/systemd/issues/61
2015-05-29path-util: Change path_is_mount_point() symlink arg from bool to flagsMartin Pitt
This makes path_is_mount_point() consistent with fd_is_mount_point() wrt. flags.
2015-05-29path-util: Fix path_is_mount_point for filesMartin Pitt
Commits 27cc6f166 and f25afeb broke path_is_mount_point() for files (such as /etc/machine-id → /run/machine-id bind mounts) as with the factorization of fd_is_mount_point() we lost the parent directory. We cannot determine that from an fd only as openat(fd, "..") only works for directory fds. Change fd_is_mount_point() to behave like openat(): It now takes a file descriptor of the containing directory, a file name in it, and flags (which can be 0 or AT_SYMLINK_FOLLOW). Unlike name_to_handle_at() or openat(), fstatat() only accepts the inverse flag AT_SYMLINK_NOFOLLOW and complains with EINVAL about AT_SYMLINK_FOLLOW; so we need to transform the flags for that fallback. Adjust rm_rf_children() accordingly (only other caller of fd_is_mount_point() aside from path_is_mount_point()). Add test cases for files, links, and file bind mounts (the latter will only work when running as root). Split out a new test_path_is_mount_point() test case function as it got significantly larger now.
2015-05-13util: add generic calls for prefixing a root directory to a pathLennart Poettering
So far a number of utilities implemented their own calls for this, unify them in prefix_root() and prefix_roota(). The former uses heap memory, the latter allocates from the stack via alloca(). Port over most users of a --root= logic.
2015-04-26path-util: fix fstat fallback in fd_is_mount_pointThomas Hindoe Paaboel Andersen
2015-04-23path-util: make use of "mnt_id" field exported in /proc/self/fdinfo/<fd> to ↵Lennart Poettering
test for mount points It's a very recent kernel addition, but certainly makes sense to support.
2015-04-06path-util: don't eat up ENOENT in path_is_mount_point()Lennart Poettering
There's no reason to eat up ENOENT, it should be OK to simply report the error back.
2015-04-06path-util: make sure fd_is_mount_point() returns true for root directoryLennart Poettering
2015-04-06path-util: if parent can do name_to_handle() but relevant dir not, it's a ↵Lennart Poettering
mount point
2015-04-06rm-rf: never cross mount pointsLennart Poettering
2015-03-16shared: add path_compare(), an ordering path comparisonMichal Schmidt
... and make path_equal() a simple wrapper around it.
2015-03-10path-util: fix path_is_mount_point() for symlinksHarald Hoyer
path_is_mount_point() compares the mount_id of a directory and the mount_id of the parent directory. When following symlinks, the function to get the parent directory does not take the symlink into account. /bin -> /usr/bin with /usr being a mountpoint: mount_id of /bin with AT_SYMLINK_FOLLOW != mount_id of /
2015-02-23remove unused includesThomas Hindoe Paaboel Andersen
This patch removes includes that are not used. The removals were found with include-what-you-use which checks if any of the symbols from a header is in use.
2015-02-20core, shared: in deserializing, match same files reached via different pathsMichal Schmidt
When dbus.socket is updated like this: -ListenStream=/var/run/dbus/system_bus_socket +ListenStream=/run/dbus/system_bus_socket ... and daemon-reload is performed, bad things happen. During deserialization systemd does not recognize that the two paths refer to the same named socket and replaces the socket file with a new one. As a result, applications hang when they try talking to dbus. Fix this by finding a match not only when the path names are equal, but also when they point to the same inode. In socket_address_equal() it is necessary to move the address size comparison into the abstract sockets branch. For path name sockets the comparison must not be done and for other families it is redundant (their sizes are constant and checked by socket_address_verify()). FIFOs and special files can also have multiple pathnames, so compare the inodes for them as well. Note that previously the pathname checks used streq_ptr(), but the paths cannot be NULL. Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1186018
2015-02-03util: rework strappenda(), and rename it strjoina()Lennart Poettering
After all it is now much more like strjoin() than strappend(). At the same time, add support for NULL sentinels, even if they are normally not necessary.
2015-01-18Add initialization helper for file_handle_unionZbigniew Jędrzejewski-Szmek
2015-01-08path-util: plug leakTom Gundersen
2014-12-18path-util: fix breakage in path_is_mount_pointDave Reisner
This fixes 2 problems introduced by 6feeeab0bc: 1) If name_to_handle_at returns ENOSYS for the child, we'll wrongly return -ENOSYS when it returns the same for the parent. Immediately jump to the fallback logic when we get ENOSYS. 2) If name_to_handle_at returns EOPNOTSUPP for the child but suceeds for the parent, we'll be comparing an uninitialized value (mount_id) to an initialized value (mount_id_parent). Initialize the mount_id variables to invalid mount_ids to avoid this.
2014-12-17path: make the check for unsupported name_to_handle_at symmetricZbigniew Jędrzejewski-Szmek
If child supports, but the parent does not, or when the child does not support, but the parent does, assume the child is a mount point. Only if neither supports use the fallback.
2014-12-17path: follow symbolic link for parent path (2)Umut Tezduyar Lindskog
c0e57ba9e22ee937722958d8b912ade2a37f206d fixed the fallback path. We should do the same for name_to_handle_at().
2014-12-16path: follow symbolic link for parent pathUmut Tezduyar Lindskog
[zj: When we lstat the target path, symlinks above the last component will be followed by both stat and lstat. So when we look at the parent, we should follow symlinks.]
2014-12-16shared: path-util - memory leakTom Gundersen
2014-12-16systemctl: refuse to edit runtime dropins when they already exist in /etcZbigniew Jędrzejewski-Szmek
The check for existing unit files and dropins is unified. path_join() is updated to not insert duplicate separators.
2014-12-12path-util: no need to check whether p is absolute twiceLennart Poettering
2014-11-22Do not check for existence of remote binariesZbigniew Jędrzejewski-Szmek
systemd-run would fail when run with -M or -H and an absolute path, if this path did not exists locally. Allow it to continue, since we don't have a nice way of checking if the binary exists remotely. The case where -M or -H is used and a local path is unchanged, and we still iterate over $PATH to find the binary. We need to convert to an absolute path, and we don't have a nice mechanism to check remotely, so we assume that the binary will be located in the same place locally and remotely. http://lists.freedesktop.org/archives/systemd-devel/2014-November/025418.html
2014-08-18util: try to be a bit more NFS compatible when checking whether an FS is ↵Lennart Poettering
writable https://bugs.freedesktop.org/show_bug.cgi?id=81169
2014-07-31Reject invalid quoted stringsZbigniew Jędrzejewski-Szmek
String which ended in an unfinished quote were accepted, potentially with bad memory accesses. Reject anything which ends in a unfished quote, or contains non-whitespace characters right after the closing quote. _FOREACH_WORD now returns the invalid character in *state. But this return value is not checked anywhere yet. Also, make 'word' and 'state' variables const pointers, and rename 'w' to 'word' in various places. Things are easier to read if the same name is used consistently. mbiebl_> am I correct that something like this doesn't work mbiebl_> ExecStart=/usr/bin/encfs --extpass='/bin/systemd-ask-passwd "Unlock EncFS"' mbiebl_> systemd seems to strip of the quotes mbiebl_> systemctl status shows mbiebl_> ExecStart=/usr/bin/encfs --extpass='/bin/systemd-ask-password Unlock EncFS $RootDir $MountPoint mbiebl_> which is pretty weird
2014-07-26Add utility function to append root to pathZbigniew Jędrzejewski-Szmek
2014-07-07Fix typoZbigniew Jędrzejewski-Szmek
2014-06-25fsck: consider a fsck implementation linked to /bin/true non-existantLennart Poettering
2014-06-24use more _cleanup_ macroRonny Chevalier
2014-06-20shared: rename path_strv_canonicalize_absolute functionsMichael Marineau
Since 12ed81d9 path_strv_canonicalize_absolute leaves the search list relative to the given root directory instead of resolving paths to their true location as the name implies. To better reflect this behavior rename to the less strongly worded path_strv_resolve.
2014-06-13os-release: define /usr/lib/os-release as fallback for /etc/os-releaseLennart Poettering
The file should have been in /usr/lib/ in the first place, since it describes the OS container in /usr (and not the configuration in /etc), hence, let's support os-release files in /usr/lib as fallback if no version in /etc exists, following the usual override logic. A prior commit already enabled tmpfiles to create /etc/os-release as a symlink to /usr/lib/os-release should it be missing, thus providing nice compatibility with applications only checking in /etc. While it's probably a good idea if all apps check both locations via a fallback logic, it is only necessary in the early boot process, as long as the /etc/os-release symlink has not been restored, in case we boot with an empty /etc.
2014-05-25path-util: fix missing terminating zeroTanu Kaskinen
There was this code: if (to_path_len > 0) memcpy(p, to_path, to_path_len); That didn't add the terminating zero, so the resulting string was corrupt if this code path was taken. Using strcpy() instead of memcpy() solves this issue, and also simplifies the code. Previously there was special handling for shortening "../../" to "../..", but that has now been replaced by a path_kill_slashes() call, which also makes the result prettier in case the input contains redundant slashes that would otherwise be copied to the result.
2014-05-16path-util: add path_make_relative()Tanu Kaskinen
In user_dirs() in path-lookup.c, I want to replace this: symlink("../../../.config/systemd/user", data_home); with symlink(config_home, data_home); to avoid hardcoding .config when XDG_CONFIG_HOME is set. The problem is that config_home is an absolute path, and it's better to make the symlink relative. path_make_relative() is an utility function that converts an absolute path into a relative one.
2014-05-15Make systemctl --root look for files in the proper placesZbigniew Jędrzejewski-Szmek
Running systemctl enable/disable/set-default/... with the --root option under strace reveals that it accessed various files and directories in the main fs, and not underneath the specified root. This can lead to correct results only when the layout and configuration in the container are identical, which often is not the case. Fix this by adding the specified root to all file access operations. This patch does not handle some corner cases: symlinks which point outside of the specified root might be interpreted differently than they would be by the kernel if the specified root was the real root. But systemctl does not create such symlinks by itself, and I think this is enough of a corner case not to be worth the additional complexity of reimplementing link chasing in systemd. Also, simplify the code in a few places and remove an hypothetical memory leak on error.
2014-04-24util: make sure all our name_to_handle_at() code makes use of file_handle_unionLennart Poettering
2014-04-21condense assignment and path_kill_slashes callsDave Reisner
2014-04-12path-util: also check for existence of binary when given absolute pathZbigniew Jędrzejewski-Szmek
In contrast to a filename-only argument, find_binary() did not actually check if an path exists, allowing the code to fail later on. This was OK, but it seems nicer to treat both paths identically. Also take advantage of path_make_absolute_cwd doing strdup() by itself if necessary to simplify.
2014-04-12fsck: Search for fsck.type in PATHMike Gilbert
Modifies find_binary() to accept NULL in the second argument. fsck.type lookup logic moved to new fsck_exists() function, with a test.
2014-02-14shared: include root when canonicalizing conf pathsMichael Marineau
The conf_files_list family accepts an alternate root path to prefix all directories in the list but path_strv_canonicalize_uniq doesn't use it. This results in the suspicious behavior of resolving directory symlinks based on the contents of / instead of the alternate root. This adds a prefix argument to path_strv_canonicalize which will now prepend the prefix, if given, to every path in the list. To avoid answering what a relative path means when called with a root prefix path_strv_canonicalize is now path_strv_canonicalize_absolute and only considers absolute paths. Fortunately all users of already call path_strv_canonicalize with a list of absolute paths.
2014-01-08No need to canonicalize fixed pathsZbigniew Jędrzejewski-Szmek
2013-12-24log: log_error() and friends add a newline after each line anyway, so avoid ↵Lennart Poettering
including it in the log strings
2013-12-06Get rid of our reimplementation of basenameZbigniew Jędrzejewski-Szmek
The only problem is that libgen.h #defines basename to point to it's own broken implementation instead of the GNU one. This can be fixed by #undefining basename.
2013-11-06path-util: paths_check_timestamp() opimizationsLennart Poettering
2013-10-29path_check_timestamp: only keep the most recent timestampTom Gundersen
There is no point in keeping one timestamp for each directory, as we only ever care about the most recent one.
2013-10-26udev: move udev_rules_check_timestamp to sharedTom Gundersen
I want to use this from a bulitin in a subsequent patch.
2013-09-09Fix two compiler warningsZbigniew Jędrzejewski-Szmek
2013-09-09run: allow non-absolute paths as commandZbigniew Jędrzejewski-Szmek