[systemd-devel] [PATCH 2/3] tmpfiles: Add --root option to operate on an alternate fs tree.
Michael Marineau
michael.marineau at coreos.com
Thu Mar 13 21:32:13 PDT 2014
This makes it possible to initialize or cleanup an arbitrary filesystem
hierarchy in the same way that it would be during system boot.
---
src/tmpfiles/tmpfiles.c | 27 ++++++++++++++++++++++++---
1 file changed, 24 insertions(+), 3 deletions(-)
diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c
index 3684289..4ce35b5 100644
--- a/src/tmpfiles/tmpfiles.c
+++ b/src/tmpfiles/tmpfiles.c
@@ -111,6 +111,7 @@ static bool arg_boot = false;
static char **include_prefixes = NULL;
static char **exclude_prefixes = NULL;
+static char *arg_root = NULL;
static const char conf_file_dirs[] =
"/etc/tmpfiles.d\0"
@@ -1188,6 +1189,15 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
if (!should_include_path(i->path))
return 0;
+ if (arg_root) {
+ char *p = strjoin(arg_root, i->path, NULL);
+ if (!p)
+ return log_oom();
+
+ free(i->path);
+ i->path = p;
+ }
+
if (user && !streq(user, "-")) {
const char *u = user;
@@ -1277,7 +1287,8 @@ static int help(void) {
" --remove Remove marked files/directories\n"
" --boot Execute actions only safe at boot\n"
" --prefix=PATH Only apply rules that apply to paths with the specified prefix\n"
- " --exclude-prefix=PATH Ignore rules that apply to paths with the specified prefix\n",
+ " --exclude-prefix=PATH Ignore rules that apply to paths with the specified prefix\n"
+ " --root=PATH Operate on an alternate filesystem root\n",
program_invocation_short_name);
return 0;
@@ -1293,6 +1304,7 @@ static int parse_argv(int argc, char *argv[]) {
ARG_BOOT,
ARG_PREFIX,
ARG_EXCLUDE_PREFIX,
+ ARG_ROOT,
};
static const struct option options[] = {
@@ -1304,6 +1316,7 @@ static int parse_argv(int argc, char *argv[]) {
{ "boot", no_argument, NULL, ARG_BOOT },
{ "prefix", required_argument, NULL, ARG_PREFIX },
{ "exclude-prefix", required_argument, NULL, ARG_EXCLUDE_PREFIX },
+ { "root", required_argument, NULL, ARG_ROOT },
{}
};
@@ -1350,6 +1363,13 @@ static int parse_argv(int argc, char *argv[]) {
return log_oom();
break;
+ case ARG_ROOT:
+ arg_root = path_make_absolute_cwd(optarg);
+ if (!arg_root)
+ return log_oom();
+ path_kill_slashes(arg_root);
+ break;
+
case '?':
return -EINVAL;
@@ -1376,7 +1396,7 @@ static int read_config_file(const char *fn, bool ignore_enoent) {
assert(fn);
- r = search_and_fopen_nulstr(fn, "re", NULL, conf_file_dirs, &f);
+ r = search_and_fopen_nulstr(fn, "re", arg_root, conf_file_dirs, &f);
if (r < 0) {
if (ignore_enoent && r == -ENOENT)
return 0;
@@ -1477,7 +1497,7 @@ int main(int argc, char *argv[]) {
_cleanup_strv_free_ char **files = NULL;
char **f;
- r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs);
+ r = conf_files_list_nulstr(&files, ".conf", arg_root, conf_file_dirs);
if (r < 0) {
log_error("Failed to enumerate tmpfiles.d files: %s", strerror(-r));
goto finish;
@@ -1508,6 +1528,7 @@ finish:
free(include_prefixes);
free(exclude_prefixes);
+ free(arg_root);
set_free_free(unix_sockets);
--
1.8.3.2
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