tmpfiles: add support for creating symlinks, char/block device nodes
This commit is contained in:
parent
fc3c1c6e09
commit
468d726bdd
|
@ -67,27 +67,31 @@
|
||||||
<title>Configuration Format</title>
|
<title>Configuration Format</title>
|
||||||
|
|
||||||
<para>Each configuration file is named in the style of
|
<para>Each configuration file is named in the style of
|
||||||
<filename><program>.conf</filename>.
|
<filename><program>.conf</filename>. Files in
|
||||||
Files in <filename>/etc/</filename> overwrite
|
<filename>/etc/</filename> override files with the
|
||||||
files with the same name in <filename>/usr/lib/</filename>.
|
same name in <filename>/usr/lib/</filename>. Files in
|
||||||
Files in <filename>/run</filename> overwrite files with
|
<filename>/run</filename> override files with the same
|
||||||
the same name in <filename>/etc/</filename> and
|
name in <filename>/etc/</filename> and
|
||||||
<filename>/usr/lib/</filename>. Packages should install their
|
<filename>/usr/lib/</filename>. Packages should
|
||||||
configuration files in <filename>/usr/lib/</filename>, files
|
install their configuration files in
|
||||||
in <filename>/etc/</filename> are reserved for the local
|
<filename>/usr/lib/</filename>, files in
|
||||||
administration, which possibly decides to overwrite the
|
<filename>/etc/</filename> are reserved for the local
|
||||||
configurations installed from packages. All files are sorted
|
administrator, who may choose to override the
|
||||||
by filename in alphabetical order, regardless in which of the
|
configurations installed from packages. The list of
|
||||||
directories they reside, to ensure that a specific
|
configuration files are sorted by their filename in
|
||||||
configuration file takes precedence over another file with
|
alphabetical order, regardless in which of the
|
||||||
an alphabetically later name.</para>
|
directories they reside, to guarantee that a
|
||||||
|
configuration file takes precedence over another
|
||||||
|
configuration file with an alphabetically later
|
||||||
|
name.</para>
|
||||||
|
|
||||||
<para>The configuration format is one line per path
|
<para>The configuration format is one line per path
|
||||||
containing action, mode, ownership and age
|
containing action, path, mode, ownership, age and argument
|
||||||
fields:</para>
|
fields:</para>
|
||||||
|
|
||||||
<programlisting>Type Path Mode UID GID Age
|
<programlisting>Type Path Mode UID GID Age Argument
|
||||||
d /run/user 0755 root root 10d</programlisting>
|
d /run/user 0755 root root 10d -
|
||||||
|
L /tmp/foobar - - - - /dev/null</programlisting>
|
||||||
|
|
||||||
<refsect2>
|
<refsect2>
|
||||||
<title>Type</title>
|
<title>Type</title>
|
||||||
|
@ -117,6 +121,21 @@ d /run/user 0755 root root 10d</programlisting>
|
||||||
<listitem><para>Create a named pipe (FIFO) if it doesn't exist yet</para></listitem>
|
<listitem><para>Create a named pipe (FIFO) if it doesn't exist yet</para></listitem>
|
||||||
</varlistentry>
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term><varname>L</varname></term>
|
||||||
|
<listitem><para>Create a symlink if it doesn't exist yet</para></listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term><varname>c</varname></term>
|
||||||
|
<listitem><para>Create a character device node if it doesn't exist yet</para></listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term><varname>b</varname></term>
|
||||||
|
<listitem><para>Create a block device node if it doesn't exist yet</para></listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
<varlistentry>
|
<varlistentry>
|
||||||
<term><varname>x</varname></term>
|
<term><varname>x</varname></term>
|
||||||
<listitem><para>Ignore a path
|
<listitem><para>Ignore a path
|
||||||
|
@ -185,10 +204,11 @@ d /run/user 0755 root root 10d</programlisting>
|
||||||
<para>The file access mode to use when
|
<para>The file access mode to use when
|
||||||
creating this file or directory. If omitted or
|
creating this file or directory. If omitted or
|
||||||
when set to - the default is used: 0755 for
|
when set to - the default is used: 0755 for
|
||||||
directories, 0644 for files. For z, Z lines
|
directories, 0644 for all other file
|
||||||
if omitted or when set to - the file access mode will
|
objects. For z, Z lines if omitted or when set
|
||||||
not be modified. This parameter is ignored for x, r, R
|
to - the file access mode will not be
|
||||||
lines.</para>
|
modified. This parameter is ignored for x, r,
|
||||||
|
R, L lines.</para>
|
||||||
</refsect2>
|
</refsect2>
|
||||||
|
|
||||||
<refsect2>
|
<refsect2>
|
||||||
|
@ -200,7 +220,7 @@ d /run/user 0755 root root 10d</programlisting>
|
||||||
omitted or when set to - the default 0 (root)
|
omitted or when set to - the default 0 (root)
|
||||||
is used. For z, Z lines when omitted or when set to -
|
is used. For z, Z lines when omitted or when set to -
|
||||||
the file ownership will not be modified.
|
the file ownership will not be modified.
|
||||||
These parameters are ignored for x, r, R lines.</para>
|
These parameters are ignored for x, r, R, L lines.</para>
|
||||||
</refsect2>
|
</refsect2>
|
||||||
|
|
||||||
<refsect2>
|
<refsect2>
|
||||||
|
@ -233,6 +253,16 @@ d /run/user 0755 root root 10d</programlisting>
|
||||||
is done.</para>
|
is done.</para>
|
||||||
</refsect2>
|
</refsect2>
|
||||||
|
|
||||||
|
<refsect2>
|
||||||
|
<title>Argument</title>
|
||||||
|
|
||||||
|
<para>For L lines determines the destination
|
||||||
|
path of the symlink. For c, b determines the
|
||||||
|
major/minor of the device node, with major and
|
||||||
|
minor formatted as integers, separated by :,
|
||||||
|
e.g. "1:3". Ignored for all other lines.</para>
|
||||||
|
</refsect2>
|
||||||
|
|
||||||
</refsect1>
|
</refsect1>
|
||||||
|
|
||||||
<refsect1>
|
<refsect1>
|
||||||
|
@ -241,7 +271,7 @@ d /run/user 0755 root root 10d</programlisting>
|
||||||
<title>/etc/tmpfiles.d/screen.conf example</title>
|
<title>/etc/tmpfiles.d/screen.conf example</title>
|
||||||
<para><command>screen</command> needs two directories created at boot with specific modes and ownership.</para>
|
<para><command>screen</command> needs two directories created at boot with specific modes and ownership.</para>
|
||||||
|
|
||||||
<programlisting>d /var/run/screens 1777 root root 10d
|
<programlisting>d /var/run/screens 1777 root root 10d
|
||||||
d /var/run/uscreens 0755 root root 10d12h</programlisting>
|
d /var/run/uscreens 0755 root root 10d12h</programlisting>
|
||||||
</example>
|
</example>
|
||||||
</refsect1>
|
</refsect1>
|
||||||
|
|
131
src/tmpfiles.c
131
src/tmpfiles.c
|
@ -57,6 +57,9 @@ typedef enum ItemType {
|
||||||
CREATE_DIRECTORY = 'd',
|
CREATE_DIRECTORY = 'd',
|
||||||
TRUNCATE_DIRECTORY = 'D',
|
TRUNCATE_DIRECTORY = 'D',
|
||||||
CREATE_FIFO = 'p',
|
CREATE_FIFO = 'p',
|
||||||
|
CREATE_SYMLINK = 'L',
|
||||||
|
CREATE_CHAR_DEVICE = 'c',
|
||||||
|
CREATE_BLOCK_DEVICE = 'b',
|
||||||
|
|
||||||
/* These ones take globs */
|
/* These ones take globs */
|
||||||
IGNORE_PATH = 'x',
|
IGNORE_PATH = 'x',
|
||||||
|
@ -70,11 +73,14 @@ typedef struct Item {
|
||||||
ItemType type;
|
ItemType type;
|
||||||
|
|
||||||
char *path;
|
char *path;
|
||||||
|
char *argument;
|
||||||
uid_t uid;
|
uid_t uid;
|
||||||
gid_t gid;
|
gid_t gid;
|
||||||
mode_t mode;
|
mode_t mode;
|
||||||
usec_t age;
|
usec_t age;
|
||||||
|
|
||||||
|
dev_t major_minor;
|
||||||
|
|
||||||
bool uid_set:1;
|
bool uid_set:1;
|
||||||
bool gid_set:1;
|
bool gid_set:1;
|
||||||
bool mode_set:1;
|
bool mode_set:1;
|
||||||
|
@ -656,6 +662,60 @@ static int create_item(Item *i) {
|
||||||
|
|
||||||
break;
|
break;
|
||||||
|
|
||||||
|
case CREATE_SYMLINK: {
|
||||||
|
char *x;
|
||||||
|
|
||||||
|
r = symlink(i->argument, i->path);
|
||||||
|
if (r < 0 && errno != EEXIST) {
|
||||||
|
log_error("symlink(%s, %s) failed: %m", i->argument, i->path);
|
||||||
|
return -errno;
|
||||||
|
}
|
||||||
|
|
||||||
|
r = readlink_malloc(i->path, &x);
|
||||||
|
if (r < 0) {
|
||||||
|
log_error("readlink(%s) failed: %s", i->path, strerror(-r));
|
||||||
|
return -errno;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!streq(i->argument, x)) {
|
||||||
|
free(x);
|
||||||
|
log_error("%s is not the right symlinks.", i->path);
|
||||||
|
return -EEXIST;
|
||||||
|
}
|
||||||
|
|
||||||
|
free(x);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
case CREATE_BLOCK_DEVICE:
|
||||||
|
case CREATE_CHAR_DEVICE: {
|
||||||
|
|
||||||
|
u = umask(0);
|
||||||
|
r = mknod(i->path, i->mode | (i->type == CREATE_BLOCK_DEVICE ? S_IFBLK : S_IFCHR), i->major_minor);
|
||||||
|
umask(u);
|
||||||
|
|
||||||
|
if (r < 0 && errno != EEXIST) {
|
||||||
|
log_error("Failed to create device node %s: %m", i->path);
|
||||||
|
return -errno;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (stat(i->path, &st) < 0) {
|
||||||
|
log_error("stat(%s) failed: %m", i->path);
|
||||||
|
return -errno;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (i->type == CREATE_BLOCK_DEVICE ? !S_ISBLK(st.st_mode) : !S_ISCHR(st.st_mode)) {
|
||||||
|
log_error("%s is not a device node.", i->path);
|
||||||
|
return -EEXIST;
|
||||||
|
}
|
||||||
|
|
||||||
|
r = item_set_perms(i, i->path);
|
||||||
|
if (r < 0)
|
||||||
|
return r;
|
||||||
|
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
case RELABEL_PATH:
|
case RELABEL_PATH:
|
||||||
|
|
||||||
r = glob_item(i, item_set_perms);
|
r = glob_item(i, item_set_perms);
|
||||||
|
@ -686,6 +746,9 @@ static int remove_item_instance(Item *i, const char *instance) {
|
||||||
case TRUNCATE_FILE:
|
case TRUNCATE_FILE:
|
||||||
case CREATE_DIRECTORY:
|
case CREATE_DIRECTORY:
|
||||||
case CREATE_FIFO:
|
case CREATE_FIFO:
|
||||||
|
case CREATE_SYMLINK:
|
||||||
|
case CREATE_BLOCK_DEVICE:
|
||||||
|
case CREATE_CHAR_DEVICE:
|
||||||
case IGNORE_PATH:
|
case IGNORE_PATH:
|
||||||
case RELABEL_PATH:
|
case RELABEL_PATH:
|
||||||
case RECURSIVE_RELABEL_PATH:
|
case RECURSIVE_RELABEL_PATH:
|
||||||
|
@ -701,8 +764,8 @@ static int remove_item_instance(Item *i, const char *instance) {
|
||||||
|
|
||||||
case TRUNCATE_DIRECTORY:
|
case TRUNCATE_DIRECTORY:
|
||||||
case RECURSIVE_REMOVE_PATH:
|
case RECURSIVE_REMOVE_PATH:
|
||||||
if ((r = rm_rf(instance, false, i->type == RECURSIVE_REMOVE_PATH, false)) < 0 &&
|
r = rm_rf(instance, false, i->type == RECURSIVE_REMOVE_PATH, false);
|
||||||
r != -ENOENT) {
|
if (r < 0 && r != -ENOENT) {
|
||||||
log_error("rm_rf(%s): %s", instance, strerror(-r));
|
log_error("rm_rf(%s): %s", instance, strerror(-r));
|
||||||
return r;
|
return r;
|
||||||
}
|
}
|
||||||
|
@ -724,6 +787,9 @@ static int remove_item(Item *i) {
|
||||||
case TRUNCATE_FILE:
|
case TRUNCATE_FILE:
|
||||||
case CREATE_DIRECTORY:
|
case CREATE_DIRECTORY:
|
||||||
case CREATE_FIFO:
|
case CREATE_FIFO:
|
||||||
|
case CREATE_SYMLINK:
|
||||||
|
case CREATE_CHAR_DEVICE:
|
||||||
|
case CREATE_BLOCK_DEVICE:
|
||||||
case IGNORE_PATH:
|
case IGNORE_PATH:
|
||||||
case RELABEL_PATH:
|
case RELABEL_PATH:
|
||||||
case RECURSIVE_RELABEL_PATH:
|
case RECURSIVE_RELABEL_PATH:
|
||||||
|
@ -761,6 +827,7 @@ static void item_free(Item *i) {
|
||||||
assert(i);
|
assert(i);
|
||||||
|
|
||||||
free(i->path);
|
free(i->path);
|
||||||
|
free(i->argument);
|
||||||
free(i);
|
free(i);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -790,6 +857,15 @@ static bool item_equal(Item *a, Item *b) {
|
||||||
(a->age_set && a->age != b->age))
|
(a->age_set && a->age != b->age))
|
||||||
return false;
|
return false;
|
||||||
|
|
||||||
|
if (a->type == CREATE_SYMLINK &&
|
||||||
|
!streq(a->argument, b->argument))
|
||||||
|
return false;
|
||||||
|
|
||||||
|
if ((a->type == CREATE_CHAR_DEVICE ||
|
||||||
|
a->type == CREATE_BLOCK_DEVICE) &&
|
||||||
|
a->major_minor != b->major_minor)
|
||||||
|
return false;
|
||||||
|
|
||||||
return true;
|
return true;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -804,7 +880,8 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
|
||||||
assert(line >= 1);
|
assert(line >= 1);
|
||||||
assert(buffer);
|
assert(buffer);
|
||||||
|
|
||||||
if (!(i = new0(Item, 1))) {
|
i = new0(Item, 1);
|
||||||
|
if (!i) {
|
||||||
log_error("Out of memory");
|
log_error("Out of memory");
|
||||||
return -ENOMEM;
|
return -ENOMEM;
|
||||||
}
|
}
|
||||||
|
@ -815,19 +892,22 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
|
||||||
"%ms "
|
"%ms "
|
||||||
"%ms "
|
"%ms "
|
||||||
"%ms "
|
"%ms "
|
||||||
|
"%ms "
|
||||||
"%ms",
|
"%ms",
|
||||||
&type,
|
&type,
|
||||||
&i->path,
|
&i->path,
|
||||||
&mode,
|
&mode,
|
||||||
&user,
|
&user,
|
||||||
&group,
|
&group,
|
||||||
&age) < 2) {
|
&age,
|
||||||
|
&i->argument) < 2) {
|
||||||
log_error("[%s:%u] Syntax error.", fname, line);
|
log_error("[%s:%u] Syntax error.", fname, line);
|
||||||
r = -EIO;
|
r = -EIO;
|
||||||
goto finish;
|
goto finish;
|
||||||
}
|
}
|
||||||
|
|
||||||
switch(type) {
|
switch(type) {
|
||||||
|
|
||||||
case CREATE_FILE:
|
case CREATE_FILE:
|
||||||
case TRUNCATE_FILE:
|
case TRUNCATE_FILE:
|
||||||
case CREATE_DIRECTORY:
|
case CREATE_DIRECTORY:
|
||||||
|
@ -839,11 +919,41 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
|
||||||
case RELABEL_PATH:
|
case RELABEL_PATH:
|
||||||
case RECURSIVE_RELABEL_PATH:
|
case RECURSIVE_RELABEL_PATH:
|
||||||
break;
|
break;
|
||||||
|
|
||||||
|
case CREATE_SYMLINK:
|
||||||
|
if (!i->argument) {
|
||||||
|
log_error("[%s:%u] Symlink file requires argument.", fname, line);
|
||||||
|
r = -EBADMSG;
|
||||||
|
goto finish;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
|
||||||
|
case CREATE_CHAR_DEVICE:
|
||||||
|
case CREATE_BLOCK_DEVICE: {
|
||||||
|
unsigned major, minor;
|
||||||
|
|
||||||
|
if (!i->argument) {
|
||||||
|
log_error("[%s:%u] Device file requires argument.", fname, line);
|
||||||
|
r = -EBADMSG;
|
||||||
|
goto finish;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (sscanf(i->argument, "%u:%u", &major, &minor) != 2) {
|
||||||
|
log_error("[%s:%u] Can't parse device file major/minor '%s'.", fname, line, i->argument);
|
||||||
|
r = -EBADMSG;
|
||||||
|
goto finish;
|
||||||
|
}
|
||||||
|
|
||||||
|
i->major_minor = makedev(major, minor);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
default:
|
default:
|
||||||
log_error("[%s:%u] Unknown file type '%c'.", fname, line, type);
|
log_error("[%s:%u] Unknown file type '%c'.", fname, line, type);
|
||||||
r = -EBADMSG;
|
r = -EBADMSG;
|
||||||
goto finish;
|
goto finish;
|
||||||
}
|
}
|
||||||
|
|
||||||
i->type = type;
|
i->type = type;
|
||||||
|
|
||||||
if (!path_is_absolute(i->path)) {
|
if (!path_is_absolute(i->path)) {
|
||||||
|
@ -895,7 +1005,9 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
|
||||||
i->mode = m;
|
i->mode = m;
|
||||||
i->mode_set = true;
|
i->mode_set = true;
|
||||||
} else
|
} else
|
||||||
i->mode = i->type == CREATE_DIRECTORY ? 0755 : 0644;
|
i->mode =
|
||||||
|
i->type == CREATE_DIRECTORY ||
|
||||||
|
i->type == TRUNCATE_DIRECTORY ? 0755 : 0644;
|
||||||
|
|
||||||
if (age && !streq(age, "-")) {
|
if (age && !streq(age, "-")) {
|
||||||
if (parse_usec(age, &i->age) < 0) {
|
if (parse_usec(age, &i->age) < 0) {
|
||||||
|
@ -909,7 +1021,8 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
|
||||||
|
|
||||||
h = needs_glob(i->type) ? globs : items;
|
h = needs_glob(i->type) ? globs : items;
|
||||||
|
|
||||||
if ((existing = hashmap_get(h, i->path))) {
|
existing = hashmap_get(h, i->path);
|
||||||
|
if (existing) {
|
||||||
|
|
||||||
/* Two identical items are fine */
|
/* Two identical items are fine */
|
||||||
if (!item_equal(existing, i))
|
if (!item_equal(existing, i))
|
||||||
|
@ -919,7 +1032,8 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
|
||||||
goto finish;
|
goto finish;
|
||||||
}
|
}
|
||||||
|
|
||||||
if ((r = hashmap_put(h, i->path, i)) < 0) {
|
r = hashmap_put(h, i->path, i);
|
||||||
|
if (r < 0) {
|
||||||
log_error("Failed to insert item %s: %s", i->path, strerror(-r));
|
log_error("Failed to insert item %s: %s", i->path, strerror(-r));
|
||||||
goto finish;
|
goto finish;
|
||||||
}
|
}
|
||||||
|
@ -1024,7 +1138,8 @@ static int read_config_file(const char *fn, bool ignore_enoent) {
|
||||||
|
|
||||||
assert(fn);
|
assert(fn);
|
||||||
|
|
||||||
if (!(f = fopen(fn, "re"))) {
|
f = fopen(fn, "re");
|
||||||
|
if (!f) {
|
||||||
|
|
||||||
if (ignore_enoent && errno == ENOENT)
|
if (ignore_enoent && errno == ENOENT)
|
||||||
return 0;
|
return 0;
|
||||||
|
|
Loading…
Reference in a new issue