[systemd-devel] [PATCH] tmpfiles: introduce type X
msekleta at redhat.com
msekleta at redhat.com
Fri Jan 18 07:13:08 PST 2013
From: Michal Sekletar <msekleta at redhat.com>
Type X will exclude path itself from clean-up. However, if the path is a
directory systemd-tmpfiles will clean-up its content.
In contrast to type x, where path is ignored completely, type X needs some
Age parameter. In order to determine Age parameter, we will look for config
entries of type d or D and pick the best match. Best match is either
exact match or longest prefix match.
---
man/tmpfiles.d.xml | 15 ++++
src/tmpfiles/tmpfiles.c | 192 +++++++++++++++++++++++++++++++-----------------
2 files changed, 138 insertions(+), 69 deletions(-)
diff --git a/man/tmpfiles.d.xml b/man/tmpfiles.d.xml
index 785264e..519f9bc 100644
--- a/man/tmpfiles.d.xml
+++ b/man/tmpfiles.d.xml
@@ -166,6 +166,21 @@ L /tmp/foobar - - - - /dev/null</programlisting>
</varlistentry>
<varlistentry>
+ <term><varname>X</varname></term>
+ <listitem><para>Ignore a path
+ during cleanup. Use this type
+ to prevent path removal as
+ controlled with the Age parameter.
+ Note that if path is a directory,
+ content of a directory is not
+ excluded from clean-up, only
+ directory itself. 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>Remove a file
or directory if it
diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c
index d8fb07e..c2023f5 100644
--- a/src/tmpfiles/tmpfiles.c
+++ b/src/tmpfiles/tmpfiles.c
@@ -70,6 +70,7 @@ typedef enum ItemType {
/* These ones take globs */
IGNORE_PATH = 'x',
+ IGNORE_DIRECTORY_PATH = 'X',
REMOVE_PATH = 'r',
RECURSIVE_REMOVE_PATH = 'R',
RELABEL_PATH = 'z',
@@ -119,7 +120,7 @@ static const char * const conf_file_dirs[] = {
#define MAX_DEPTH 256
static bool needs_glob(ItemType t) {
- return t == IGNORE_PATH || t == REMOVE_PATH || t == RECURSIVE_REMOVE_PATH || t == RELABEL_PATH || t == RECURSIVE_RELABEL_PATH;
+ return t == IGNORE_PATH || t == IGNORE_DIRECTORY_PATH || t == REMOVE_PATH || t == RECURSIVE_REMOVE_PATH || t == RELABEL_PATH || t == RECURSIVE_RELABEL_PATH;
}
static struct Item* find_glob(Hashmap *h, const char *match) {
@@ -218,6 +219,7 @@ static bool unix_socket_alive(const char *fn) {
}
static int dir_cleanup(
+ Item *i,
const char *p,
DIR *d,
const struct stat *ds,
@@ -297,7 +299,7 @@ static int dir_cleanup(
continue;
}
- q = dir_cleanup(sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1, false);
+ q = dir_cleanup(i, sub_path, sub_dir, &s, cutoff, rootdev, false, maxdepth-1, false);
closedir(sub_dir);
if (q < 0)
@@ -320,12 +322,14 @@ static int dir_cleanup(
if (age >= cutoff)
continue;
- log_debug("rmdir '%s'\n", sub_path);
+ if (!i->type == IGNORE_DIRECTORY_PATH || !streq(dent->d_name, p)) {
+ log_debug("rmdir '%s'\n", sub_path);
- if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0) {
- if (errno != ENOENT && errno != ENOTEMPTY) {
- log_error("rmdir(%s): %m", sub_path);
- r = -errno;
+ if (unlinkat(dirfd(d), dent->d_name, AT_REMOVEDIR) < 0) {
+ if (errno != ENOENT && errno != ENOTEMPTY) {
+ log_error("rmdir(%s): %m", sub_path);
+ r = -errno;
+ }
}
}
@@ -395,68 +399,6 @@ finish:
return r;
}
-static int clean_item(Item *i) {
- DIR *d;
- struct stat s, ps;
- bool mountpoint;
- int r;
- usec_t cutoff, n;
-
- assert(i);
-
- if (i->type != CREATE_DIRECTORY &&
- i->type != TRUNCATE_DIRECTORY &&
- i->type != IGNORE_PATH)
- return 0;
-
- if (!i->age_set)
- return 0;
-
- n = now(CLOCK_REALTIME);
- if (n < i->age)
- return 0;
-
- cutoff = n - i->age;
-
- d = opendir(i->path);
- if (!d) {
- if (errno == ENOENT)
- return 0;
-
- log_error("Failed to open directory %s: %m", i->path);
- return -errno;
- }
-
- if (fstat(dirfd(d), &s) < 0) {
- log_error("stat(%s) failed: %m", i->path);
- r = -errno;
- goto finish;
- }
-
- if (!S_ISDIR(s.st_mode)) {
- log_error("%s is not a directory.", i->path);
- r = -ENOTDIR;
- goto finish;
- }
-
- if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0) {
- log_error("stat(%s/..) failed: %m", i->path);
- r = -errno;
- goto finish;
- }
-
- mountpoint = s.st_dev != ps.st_dev ||
- (s.st_dev == ps.st_dev && s.st_ino == ps.st_ino);
-
- r = dir_cleanup(i->path, d, &s, cutoff, s.st_dev, mountpoint, MAX_DEPTH, i->keep_first_level);
-
-finish:
- if (d)
- closedir(d);
-
- return r;
-}
-
static int item_set_perms(Item *i, const char *path) {
/* not using i->path directly because it may be a glob */
if (i->mode_set)
@@ -669,6 +611,7 @@ static int create_item(Item *i) {
switch (i->type) {
case IGNORE_PATH:
+ case IGNORE_DIRECTORY_PATH:
case REMOVE_PATH:
case RECURSIVE_REMOVE_PATH:
return 0;
@@ -852,6 +795,7 @@ static int remove_item_instance(Item *i, const char *instance) {
case CREATE_BLOCK_DEVICE:
case CREATE_CHAR_DEVICE:
case IGNORE_PATH:
+ case IGNORE_DIRECTORY_PATH:
case RELABEL_PATH:
case RECURSIVE_RELABEL_PATH:
case WRITE_FILE:
@@ -896,6 +840,7 @@ static int remove_item(Item *i) {
case CREATE_CHAR_DEVICE:
case CREATE_BLOCK_DEVICE:
case IGNORE_PATH:
+ case IGNORE_DIRECTORY_PATH:
case RELABEL_PATH:
case RECURSIVE_RELABEL_PATH:
case WRITE_FILE:
@@ -911,6 +856,84 @@ static int remove_item(Item *i) {
return r;
}
+static int clean_item_instance(Item *i, const char* instance) {
+ DIR *d;
+ struct stat s, ps;
+ bool mountpoint;
+ int r;
+ usec_t cutoff, n;
+
+ assert(i);
+
+ if (!i->age_set)
+ return 0;
+
+ n = now(CLOCK_REALTIME);
+ if (n < i->age)
+ return 0;
+
+ cutoff = n - i->age;
+
+ d = opendir(instance);
+ if (!d) {
+ if (errno == ENOENT || errno == ENOTDIR)
+ return 0;
+
+ log_error("Failed to open directory %s: %m", i->path);
+ return -errno;
+ }
+
+ if (fstat(dirfd(d), &s) < 0) {
+ log_error("stat(%s) failed: %m", i->path);
+ r = -errno;
+ goto finish;
+ }
+
+ if (!S_ISDIR(s.st_mode)) {
+ log_error("%s is not a directory.", i->path);
+ r = -ENOTDIR;
+ goto finish;
+ }
+
+ if (fstatat(dirfd(d), "..", &ps, AT_SYMLINK_NOFOLLOW) != 0) {
+ log_error("stat(%s/..) failed: %m", i->path);
+ r = -errno;
+ goto finish;
+ }
+
+ mountpoint = s.st_dev != ps.st_dev ||
+ (s.st_dev == ps.st_dev && s.st_ino == ps.st_ino);
+
+ r = dir_cleanup(i, instance, d, &s, cutoff, s.st_dev, mountpoint, MAX_DEPTH, i->keep_first_level);
+
+finish:
+ if (d)
+ closedir(d);
+
+ return r;
+}
+
+static int clean_item(Item *i) {
+ int r = 0;
+
+ assert(i);
+
+ switch (i->type) {
+ case CREATE_DIRECTORY:
+ case TRUNCATE_DIRECTORY:
+ case IGNORE_PATH:
+ clean_item_instance(i, i->path);
+ break;
+ case IGNORE_DIRECTORY_PATH:
+ r = glob_item(i, clean_item_instance);
+ break;
+ default:
+ break;
+ }
+
+ return r;
+}
+
static int process_item(Item *i) {
int r, q, p;
@@ -1030,6 +1053,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
case TRUNCATE_DIRECTORY:
case CREATE_FIFO:
case IGNORE_PATH:
+ case IGNORE_DIRECTORY_PATH:
case REMOVE_PATH:
case RECURSIVE_REMOVE_PATH:
case RELABEL_PATH:
@@ -1266,6 +1290,8 @@ static int read_config_file(const char *fn, bool ignore_enoent) {
FILE *f;
unsigned v = 0;
int r = 0;
+ Iterator iterator;
+ Item *i;
assert(fn);
@@ -1298,6 +1324,34 @@ static int read_config_file(const char *fn, bool ignore_enoent) {
r = k;
}
+ /* we have to determine age parameter for each entry of type X */
+ HASHMAP_FOREACH(i, globs, iterator) {
+ Iterator iter;
+ Item *j, *candidate_item = NULL;
+
+ if (i->type != IGNORE_DIRECTORY_PATH)
+ continue;
+
+ HASHMAP_FOREACH(j, items, iter) {
+ if (j->type != CREATE_DIRECTORY && j->type != TRUNCATE_DIRECTORY)
+ continue;
+
+ if (path_equal(j->path, i->path)) {
+ candidate_item = j;
+ break;
+ }
+
+ if ((!candidate_item && path_startswith(i->path, j->path)) ||
+ (candidate_item && path_startswith(j->path, candidate_item->path) && (fnmatch(i->path, j->path, FNM_PATHNAME | FNM_PERIOD) == 0)))
+ candidate_item = j;
+ }
+
+ if (candidate_item) {
+ i->age = candidate_item->age;
+ i->age_set = true;
+ }
+ }
+
if (ferror(f)) {
log_error("Failed to read from file %s: %m", fn);
if (r == 0)
--
1.8.1
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