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systemctl: refuse to edit runtime dropins when they already exist in /etc

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The check for existing unit files and dropins is unified.

path_join() is updated to not insert duplicate separators.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek
2014-12-15 23:01:05 -05:00
parent ad2a035820
commit bc854dc7cd
3 changed files with 41 additions and 108 deletions
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6
src/shared/path-util.c
View File

@ -439,14 +439,14 @@ char* path_join(const char *root, const char *path, const char *rest) {
assert(path); assert(path);
if (!isempty(root)) if (!isempty(root))
return strjoin(root, "/", return strjoin(root, endswith(root, "/") ? "" : "/",
path[0] == '/' ? path+1 : path, path[0] == '/' ? path+1 : path,
rest ? "/" : NULL, rest ? (endswith(path, "/") ? "" : "/") : NULL,
rest && rest[0] == '/' ? rest+1 : rest, rest && rest[0] == '/' ? rest+1 : rest,
NULL); NULL);
else else
return strjoin(path, return strjoin(path,
rest ? "/" : NULL, rest ? (endswith(path, "/") ? "" : "/") : NULL,
rest && rest[0] == '/' ? rest+1 : rest, rest && rest[0] == '/' ? rest+1 : rest,
NULL); NULL);
} }

139
src/systemctl/systemctl.c
View File

@ -5902,41 +5902,58 @@ static int create_edit_temp_file(const char *new_path, const char *original_path
return 0; return 0;
} }
static int get_drop_in_to_edit(const char *unit_name, const char *user_home, const char *user_runtime, char **ret_path) { static int get_file_to_edit(const char *name, const char *user_home, const char *user_runtime, char **ret_path) {
char *tmp_new_path; _cleanup_free_ char *path = NULL, *path2 = NULL, *run = NULL;
char *tmp;
assert(unit_name);
assert(ret_path);
switch (arg_scope) { switch (arg_scope) {
case UNIT_FILE_SYSTEM: case UNIT_FILE_SYSTEM:
tmp = strappenda(arg_runtime ? "/run/systemd/system/" : SYSTEM_CONFIG_UNIT_PATH "/", unit_name, ".d/override.conf"); path = path_join(arg_root, SYSTEM_CONFIG_UNIT_PATH, name);
if (arg_runtime)
run = path_join(arg_root, "/run/systemd/system/", name);
break; break;
case UNIT_FILE_GLOBAL: case UNIT_FILE_GLOBAL:
tmp = strappenda(arg_runtime ? "/run/systemd/user/" : USER_CONFIG_UNIT_PATH "/", unit_name, ".d/override.conf"); path = path_join(arg_root, USER_CONFIG_UNIT_PATH, name);
if (arg_runtime)
run = path_join(arg_root, "/run/systemd/user/", name);
break; break;
case UNIT_FILE_USER: case UNIT_FILE_USER:
assert(user_home); assert(user_home);
assert(user_runtime); assert(user_runtime);
tmp = strappenda(arg_runtime ? user_runtime : user_home, "/", unit_name, ".d/override.conf"); path = path_join(arg_root, user_home, name);
if (arg_runtime) {
path2 = path_join(arg_root, USER_CONFIG_UNIT_PATH, name);
if (!path2)
return log_oom();
run = path_join(arg_root, user_runtime, name);
}
break; break;
default: default:
assert_not_reached("Invalid scope"); assert_not_reached("Invalid scope");
} }
if (!path || (arg_runtime && !run))
tmp_new_path = path_join(arg_root, tmp, NULL);
if (!tmp_new_path)
return log_oom(); return log_oom();
*ret_path = tmp_new_path; if (arg_runtime) {
if (access(path, F_OK) >= 0)
return log_error_errno(EEXIST, "Refusing to create \"%s\" because it would be overriden by \"%s\" anyway.",
run, path);
if (path2 && access(path2, F_OK) >= 0)
return log_error_errno(EEXIST, "Refusing to create \"%s\" because it would be overriden by \"%s\" anyway.",
run, path2);
*ret_path = run;
run = NULL;
} else {
*ret_path = path;
path = NULL;
}
return 0; return 0;
} }
static int unit_file_create_drop_in(const char *unit_name, const char *user_home, const char *user_runtime, char **ret_new_path, char **ret_tmp_path) {
char *tmp_new_path; static int unit_file_create_dropin(const char *unit_name, const char *user_home, const char *user_runtime, char **ret_new_path, char **ret_tmp_path) {
char *tmp_new_path, *ending;
char *tmp_tmp_path; char *tmp_tmp_path;
int r; int r;
@ -5944,7 +5961,8 @@ static int unit_file_create_drop_in(const char *unit_name, const char *user_home
assert(ret_new_path); assert(ret_new_path);
assert(ret_tmp_path); assert(ret_tmp_path);
r = get_drop_in_to_edit(unit_name, user_home, user_runtime, &tmp_new_path); ending = strappenda(unit_name, ".d/override.conf");
r = get_file_to_edit(ending, user_home, user_runtime, &tmp_new_path);
if (r < 0) if (r < 0)
return r; return r;
@ -5960,91 +5978,6 @@ static int unit_file_create_drop_in(const char *unit_name, const char *user_home
return 0; return 0;
} }
static bool unit_is_editable(const char *unit_name, const char *fragment_path, const char *user_home) {
bool editable = true;
const char *invalid_path;
assert(unit_name);
if (!arg_runtime)
return true;
switch (arg_scope) {
case UNIT_FILE_SYSTEM:
if (path_startswith(fragment_path, "/etc/systemd/system")) {
editable = false;
invalid_path = "/etc/systemd/system";
} else if (path_startswith(fragment_path, SYSTEM_CONFIG_UNIT_PATH)) {
editable = false;
invalid_path = SYSTEM_CONFIG_UNIT_PATH;
}
break;
case UNIT_FILE_GLOBAL:
if (path_startswith(fragment_path, "/etc/systemd/user")) {
editable = false;
invalid_path = "/etc/systemd/user";
} else if (path_startswith(fragment_path, USER_CONFIG_UNIT_PATH)) {
editable = false;
invalid_path = USER_CONFIG_UNIT_PATH;
}
break;
case UNIT_FILE_USER:
assert(user_home);
if (path_startswith(fragment_path, "/etc/systemd/user")) {
editable = false;
invalid_path = "/etc/systemd/user";
} else if (path_startswith(fragment_path, USER_CONFIG_UNIT_PATH)) {
editable = false;
invalid_path = USER_CONFIG_UNIT_PATH;
} else if (path_startswith(fragment_path, user_home)) {
editable = false;
invalid_path = user_home;
}
break;
default:
assert_not_reached("Invalid scope");
}
if (!editable)
log_error("%s ignored: cannot temporarily edit units from %s", unit_name, invalid_path);
return editable;
}
static int get_copy_to_edit(const char *unit_name, const char *fragment_path, const char *user_home, const char *user_runtime, char **ret_path) {
char *tmp_new_path;
assert(unit_name);
assert(ret_path);
if (!unit_is_editable(unit_name, fragment_path, user_home))
return -EINVAL;
switch (arg_scope) {
case UNIT_FILE_SYSTEM:
tmp_new_path = path_join(arg_root, arg_runtime ? "/run/systemd/system/" : SYSTEM_CONFIG_UNIT_PATH, unit_name);
break;
case UNIT_FILE_GLOBAL:
tmp_new_path = path_join(arg_root, arg_runtime ? "/run/systemd/user/" : USER_CONFIG_UNIT_PATH, unit_name);
break;
case UNIT_FILE_USER:
assert(user_home);
assert(user_runtime);
tmp_new_path = path_join(arg_root, arg_runtime ? user_runtime : user_home, unit_name);
break;
default:
assert_not_reached("Invalid scope");
}
if (!tmp_new_path)
return log_oom();
*ret_path = tmp_new_path;
return 0;
}
static int unit_file_create_copy(const char *unit_name, static int unit_file_create_copy(const char *unit_name,
const char *fragment_path, const char *fragment_path,
const char *user_home, const char *user_home,
@ -6060,7 +5993,7 @@ static int unit_file_create_copy(const char *unit_name,
assert(ret_new_path); assert(ret_new_path);
assert(ret_tmp_path); assert(ret_tmp_path);
r = get_copy_to_edit(unit_name, fragment_path, user_home, user_runtime, &tmp_new_path); r = get_file_to_edit(unit_name, user_home, user_runtime, &tmp_new_path);
if (r < 0) if (r < 0)
return r; return r;
@ -6192,7 +6125,7 @@ static int find_paths_to_edit(sd_bus *bus, char **names, char ***paths) {
if (arg_full) if (arg_full)
r = unit_file_create_copy(*name, path, user_home, user_runtime, &new_path, &tmp_path); r = unit_file_create_copy(*name, path, user_home, user_runtime, &new_path, &tmp_path);
else else
r = unit_file_create_drop_in(*name, user_home, user_runtime, &new_path, &tmp_path); r = unit_file_create_dropin(*name, user_home, user_runtime, &new_path, &tmp_path);
if (r < 0) if (r < 0)
return r; return r;

4
src/test/test-path-util.c
View File

@ -176,13 +176,13 @@ static void test_path_join(void) {
test_join("/root", "/a/b", "/c", "/root/a/b/c"); test_join("/root", "/a/b", "/c", "/root/a/b/c");
test_join("/root", "a/b", "c", "/root/a/b/c"); test_join("/root", "a/b", "c", "/root/a/b/c");
test_join("/root", "/a/b", "c", "/root/a/b/c"); test_join("/root", "/a/b", "c", "/root/a/b/c");
test_join("/root", "/", "c", "/root//c"); test_join("/root", "/", "c", "/root/c");
test_join("/root", "/", NULL, "/root/"); test_join("/root", "/", NULL, "/root/");
test_join(NULL, "/a/b", "/c", "/a/b/c"); test_join(NULL, "/a/b", "/c", "/a/b/c");
test_join(NULL, "a/b", "c", "a/b/c"); test_join(NULL, "a/b", "c", "a/b/c");
test_join(NULL, "/a/b", "c", "/a/b/c"); test_join(NULL, "/a/b", "c", "/a/b/c");
test_join(NULL, "/", "c", "//c"); test_join(NULL, "/", "c", "/c");
test_join(NULL, "/", NULL, "/"); test_join(NULL, "/", NULL, "/");
} }