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tmpfiles: add a new "m" line type that adjusts user/group/mode of a file if it exists

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This commit is contained in:
Lennart Poettering 2013-09-17 16:33:30 -05:00
parent d8a1100346
commit 265ffa1e05
3 changed files with 43 additions and 9 deletions
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2
man/systemd-tmpfiles.xml
View File

@ -165,7 +165,7 @@
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>tmpfiles.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>tmpfiles.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>
</para>
</refsect1>

11
man/tmpfiles.d.xml
View File

@ -155,6 +155,17 @@ L /tmp/foobar - - - - /dev/null</programlisting>
<listitem><para>Create a block device node if it does not exist yet</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>m</varname></term>
<listitem><para>If the
specified file path exists
adjust its access mode, group
and user to the specified
values and reset the SELinux
label. If it doesn't exist do
nothing.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>x</varname></term>
<listitem><para>Ignore a path

39
src/tmpfiles/tmpfiles.c
View File

@ -69,6 +69,7 @@ typedef enum ItemType {
CREATE_SYMLINK = 'L',
CREATE_CHAR_DEVICE = 'c',
CREATE_BLOCK_DEVICE = 'b',
ADJUST_MODE = 'm',
/* These ones take globs */
IGNORE_PATH = 'x',
@ -257,8 +258,8 @@ static int dir_cleanup(
dev_t rootdev,
bool mountpoint,
int maxdepth,
bool keep_this_level)
{
bool keep_this_level) {
struct dirent *dent;
struct timespec times[2];
bool deleted = false;
@ -429,12 +430,16 @@ finish:
return r;
}
static int item_set_perms(Item *i, const char *path) {
static int item_set_perms_full(Item *i, const char *path, bool ignore_enoent) {
int r;
/* not using i->path directly because it may be a glob */
if (i->mode_set)
if (chmod(path, i->mode) < 0) {
log_error("chmod(%s) failed: %m", path);
return -errno;
if (errno != ENOENT || !ignore_enoent) {
log_error("chmod(%s) failed: %m", path);
return -errno;
}
}
if (i->uid_set || i->gid_set)
@ -442,11 +447,18 @@ static int item_set_perms(Item *i, const char *path) {
i->uid_set ? i->uid : (uid_t) -1,
i->gid_set ? i->gid : (gid_t) -1) < 0) {
log_error("chown(%s) failed: %m", path);
return -errno;
if (errno != ENOENT || !ignore_enoent) {
log_error("chown(%s) failed: %m", path);
return -errno;
}
}
return label_fix(path, false, false);
r = label_fix(path, false, false);
return r == -ENOENT && ignore_enoent ? 0 : r;
}
static int item_set_perms(Item *i, const char *path) {
return item_set_perms_full(i, path, false);
}
static int write_one_file(Item *i, const char *path) {
@ -642,6 +654,7 @@ static int create_item(Item *i) {
if (r < 0)
return r;
break;
case WRITE_FILE:
r = glob_item(i, write_one_file);
if (r < 0)
@ -649,6 +662,13 @@ static int create_item(Item *i) {
break;
case ADJUST_MODE:
r = item_set_perms_full(i, i->path, true);
if (r < 0)
return r;
break;
case TRUNCATE_DIRECTORY:
case CREATE_DIRECTORY:
@ -819,6 +839,7 @@ static int remove_item_instance(Item *i, const char *instance) {
case RELABEL_PATH:
case RECURSIVE_RELABEL_PATH:
case WRITE_FILE:
case ADJUST_MODE:
break;
case REMOVE_PATH:
@ -864,6 +885,7 @@ static int remove_item(Item *i) {
case RELABEL_PATH:
case RECURSIVE_RELABEL_PATH:
case WRITE_FILE:
case ADJUST_MODE:
break;
case REMOVE_PATH:
@ -1106,6 +1128,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
case RECURSIVE_REMOVE_PATH:
case RELABEL_PATH:
case RECURSIVE_RELABEL_PATH:
case ADJUST_MODE:
break;
case CREATE_SYMLINK: