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tmpfiles: support globs

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This commit is contained in:
Lennart Poettering 2011-02-12 09:31:25 +01:00
parent 72f576bdd6
commit b8bb3e8f34
3 changed files with 126 additions and 25 deletions
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4
TODO
View File

@ -9,6 +9,8 @@ Bugs:
Features:
* perhaps add "systemctl reenable" as combination of "systemctl disable" and "systemctl enable"
* tty name lock for password agent is broken, since it will always lock "/dev/tty" since we now reattach the agent process when forking it off systemctl
* need a way to apply mount options of api vfs from systemd unit files instead of fstab
@ -50,8 +52,6 @@ Features:
* load EnvironmentFile= when starting services, not when reloading configuration
https://bugzilla.redhat.com/show_bug.cgi?id=661282
* support globs in systemd-tmpfiles
* drop IN_ATTRIB from inotify watches for .path units where possible to avoid
lots of wakeups due to /dev changing when we watch a subdir of /dev.

54
man/tmpfiles.d.xml
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@ -54,11 +54,11 @@
<para><command>systemd</command> uses
<filename>/etc/tmpfiles.d/</filename> to describe the
creation, cleaning and removal of temporary files and
directories which usually reside in
<filename>/var/run</filename> or
<filename>/tmp</filename>). Each configuration file
is named in the style of
creation, cleaning and removal of volatile files and
directories which usually reside in directories such
as <filename>/var/run</filename> or
<filename>/tmp</filename>. Each configuration file is
named in the style of
<filename>/etc/tmpfiles.d/&lt;program&gt;.conf</filename>.</para>
</refsect1>
@ -97,17 +97,41 @@ d /var/run/user 0755 root root 10d</programlisting>
<varlistentry>
<term><varname>x</varname></term>
<listitem><para>Ignore a path</para></listitem>
<listitem><para>Ignore a path
during cleaning. Use this type
to exclude paths from clean-up
as controlled with the Age
parameter. Note that lines of
this type do not influence the
effect of r or R lines. Lines
of this type accept
shell-style globs in place of
of normal path
names.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>r</varname></term>
<listitem><para>Remove a path</para></listitem>
<listitem><para>Remove a file
or directory if it
exists. This may not be used
to remove non-empty
directories, use R for
that. Lines of this type
accept shell-style globs in
place of normal path
names.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>R</varname></term>
<listitem><para>Recursively remove a path</para></listitem>
<listitem><para>Recursively
remove a path and all its
subdirectories (if it is a
directory). Lines of this type
accept shell-style globs in
place of normal path
names.</para></listitem>
</varlistentry>
</variablelist>
</refsect2>
@ -115,10 +139,11 @@ d /var/run/user 0755 root root 10d</programlisting>
<refsect2>
<title>Mode</title>
<para>The file access mode to use for this
file or directory. If omitted or when set to -
the default is used: 0755 for directories,
0644 for files.</para>
<para>The file access mode to use when
creating this file or directory. If omitted or
when set to - the default is used: 0755 for
directories, 0644 for files. This parameter is
ignored for x, r, R lines.</para>
</refsect2>
<refsect2>
@ -127,8 +152,9 @@ d /var/run/user 0755 root root 10d</programlisting>
<para>The user and group to use for this file
or directory. This may either be a numeric
user/group ID or a user or group name. If
omitted or when set to - the default 0 is
used.</para>
omitted or when set to - the default 0 (root)
is used. . These parameters are ignored for x,
r, R lines.</para>
</refsect2>
<refsect2>

93
src/tmpfiles.c
View File

@ -36,6 +36,8 @@
#include <time.h>
#include <sys/types.h>
#include <sys/param.h>
#include <glob.h>
#include <fnmatch.h>
#include "log.h"
#include "util.h"
@ -50,10 +52,13 @@
* bootup. */
enum {
/* These ones take file names */
CREATE_FILE = 'f',
TRUNCATE_FILE = 'F',
CREATE_DIRECTORY = 'd',
TRUNCATE_DIRECTORY = 'D',
/* These ones take globs */
IGNORE_PATH = 'x',
REMOVE_PATH = 'r',
RECURSIVE_REMOVE_PATH = 'R'
@ -74,7 +79,7 @@ typedef struct Item {
bool age_set:1;
} Item;
static Hashmap *items = NULL;
static Hashmap *items = NULL, *globs = NULL;
static bool arg_create = false;
static bool arg_clean = false;
@ -82,6 +87,21 @@ static bool arg_remove = false;
#define MAX_DEPTH 256
static bool needs_glob(int t) {
return t == IGNORE_PATH || t == REMOVE_PATH || t == RECURSIVE_REMOVE_PATH;
}
static struct Item* find_glob(Hashmap *h, const char *match) {
Item *j;
Iterator i;
HASHMAP_FOREACH(j, h, i)
if (fnmatch(j->path, match, FNM_PATHNAME|FNM_PERIOD) == 0)
return j;
return NULL;
}
static int dir_cleanup(
const char *p,
DIR *d,
@ -136,6 +156,9 @@ static int dir_cleanup(
if (hashmap_get(items, sub_path))
continue;
if (find_glob(globs, sub_path))
continue;
if (S_ISDIR(s.st_mode)) {
if (mountpoint &&
@ -411,7 +434,7 @@ finish:
return r;
}
static int remove_item(Item *i) {
static int remove_item(Item *i, const char *instance) {
int r;
assert(i);
@ -425,8 +448,8 @@ static int remove_item(Item *i) {
break;
case REMOVE_PATH:
if (remove(i->path) < 0 && errno != ENOENT) {
log_error("remove(%s): %m", i->path);
if (remove(instance) < 0 && errno != ENOENT) {
log_error("remove(%s): %m", instance);
return -errno;
}
@ -434,9 +457,9 @@ static int remove_item(Item *i) {
case TRUNCATE_DIRECTORY:
case RECURSIVE_REMOVE_PATH:
if ((r = rm_rf(i->path, false, i->type == RECURSIVE_REMOVE_PATH)) < 0 &&
if ((r = rm_rf(instance, false, i->type == RECURSIVE_REMOVE_PATH)) < 0 &&
r != -ENOENT) {
log_error("rm_rf(%s): %s", i->path, strerror(-r));
log_error("rm_rf(%s): %s", instance, strerror(-r));
return r;
}
@ -446,13 +469,57 @@ static int remove_item(Item *i) {
return 0;
}
static int remove_item_glob(Item *i) {
assert(i);
switch (i->type) {
case CREATE_FILE:
case TRUNCATE_FILE:
case CREATE_DIRECTORY:
case IGNORE_PATH:
break;
case REMOVE_PATH:
case TRUNCATE_DIRECTORY:
case RECURSIVE_REMOVE_PATH: {
int r = 0, k;
glob_t g;
char **fn;
zero(g);
errno = 0;
if ((k = glob(i->path, GLOB_NOSORT|GLOB_BRACE, NULL, &g)) != 0) {
if (k != GLOB_NOMATCH) {
if (errno != 0)
errno = EIO;
log_error("glob(%s) failed: %m", i->path);
return -errno;
}
}
STRV_FOREACH(fn, g.gl_pathv)
if ((k = remove_item(i, *fn)) < 0)
r = k;
globfree(&g);
return r;
}
}
return 0;
}
static int process_item(Item *i) {
int r, q, p;
assert(i);
r = arg_create ? create_item(i) : 0;
q = arg_remove ? remove_item(i) : 0;
q = arg_remove ? remove_item_glob(i) : 0;
p = arg_clean ? clean_item(i) : 0;
if (r < 0)
@ -590,7 +657,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer, cons
i->age_set = true;
}
if ((r = hashmap_put(items, i->path, i)) < 0) {
if ((r = hashmap_put(needs_glob(i->type) ? globs : items, i->path, i)) < 0) {
if (r == -EEXIST) {
log_warning("Two or more conflicting lines for %s configured, ignoring.", i->path);
r = 0;
@ -721,7 +788,10 @@ int main(int argc, char *argv[]) {
label_init();
if (!(items = hashmap_new(string_hash_func, string_compare_func))) {
items = hashmap_new(string_hash_func, string_compare_func);
globs = hashmap_new(string_hash_func, string_compare_func);
if (!items || !globs) {
log_error("Out of memory");
r = EXIT_FAILURE;
goto finish;
@ -796,6 +866,10 @@ int main(int argc, char *argv[]) {
free(de);
HASHMAP_FOREACH(i, globs, iterator)
if (process_item(i) < 0)
r = EXIT_FAILURE;
HASHMAP_FOREACH(i, items, iterator)
if (process_item(i) < 0)
r = EXIT_FAILURE;
@ -805,6 +879,7 @@ finish:
item_free(i);
hashmap_free(items);
hashmap_free(globs);
label_finish();