From cf9a4abdc24c43565d0890fcb88c00169057c0c4 Mon Sep 17 00:00:00 2001 From: Michael Marineau Date: Thu, 13 Mar 2014 21:32:13 -0700 Subject: [PATCH] tmpfiles: add --root option to operate on an alternate fs tree This makes it possible to initialize or cleanup an arbitrary filesystem hierarchy in the same way that it would be during system boot. --- man/systemd-tmpfiles.xml | 12 ++++++++++-- src/tmpfiles/tmpfiles.c | 27 ++++++++++++++++++++++++--- 2 files changed, 34 insertions(+), 5 deletions(-) diff --git a/man/systemd-tmpfiles.xml b/man/systemd-tmpfiles.xml index 0b6264033..fad2cbbb1 100644 --- a/man/systemd-tmpfiles.xml +++ b/man/systemd-tmpfiles.xml @@ -139,19 +139,27 @@ - + Only apply rules that apply to paths with the specified prefix. This option can be specified multiple times. - + Ignore rules that apply to paths with the specified prefix. This option can be specified multiple times. + + + Takes a directory path + as an argument. All paths will be + prefixed with the given alternate root + path, including config search paths. + + diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c index 36842898a..52f80379e 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 = strappend(arg_root, i->path); + 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); -- 2.30.2