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From 523abe6fb5160861889858319ccd97fba5bae9a7 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 26 Jan 2016 20:25:10 +0100
Subject: [PATCH 2/6] basic: don't append suffixes to unit name glob
expressions
When the user specifies "foo*" as unit name glob expression, we shouldn't turn this into "foo*.service". Hence: only
append a suffix if the specified string isn't a glob expression.
Fixes: #2397
(cherry picked from commit 2aaafcf57048983b2b76d6325f333e50aca4a3a3)
Resolves: #1288851
---
src/basic/unit-name.c | 44 +++++++++++++++++++++++++++++++++-----------
src/test/test-unit-name.c | 32 +++++++++++++++++++-------------
2 files changed, 52 insertions(+), 24 deletions(-)
diff --git a/src/basic/unit-name.c b/src/basic/unit-name.c
index bf52463..70db7a3 100644
--- a/src/basic/unit-name.c
+++ b/src/basic/unit-name.c
@@ -29,10 +29,22 @@
#include "def.h"
#include "strv.h"
+/* Characters valid in a unit name. */
#define VALID_CHARS \
- DIGITS LETTERS \
+ DIGITS \
+ LETTERS \
":-_.\\"
+/* The same, but also permits the single @ character that may appear */
+#define VALID_CHARS_WITH_AT \
+ "@" \
+ VALID_CHARS
+
+/* All chars valid in a unit name glob */
+#define VALID_CHARS_GLOB \
+ VALID_CHARS_WITH_AT \
+ "[]!-*?"
+
bool unit_name_is_valid(const char *n, UnitNameFlags flags) {
const char *e, *i, *at;
@@ -596,7 +608,7 @@ static char *do_escape_mangle(const char *f, UnitNameMangle allow_globs, char *t
/* We'll only escape the obvious characters here, to play
* safe. */
- valid_chars = allow_globs == UNIT_NAME_GLOB ? "@" VALID_CHARS "[]!-*?" : "@" VALID_CHARS;
+ valid_chars = allow_globs == UNIT_NAME_GLOB ? VALID_CHARS_GLOB : VALID_CHARS_WITH_AT;
for (; *f; f++) {
if (*f == '/')
@@ -631,15 +643,15 @@ int unit_name_mangle_with_suffix(const char *name, UnitNameMangle allow_globs, c
if (!unit_suffix_is_valid(suffix))
return -EINVAL;
- if (unit_name_is_valid(name, UNIT_NAME_ANY)) {
- /* No mangling necessary... */
- s = strdup(name);
- if (!s)
- return -ENOMEM;
+ /* Already a fully valid unit name? If so, no mangling is necessary... */
+ if (unit_name_is_valid(name, UNIT_NAME_ANY))
+ goto good;
- *ret = s;
- return 0;
- }
+ /* Already a fully valid globbing expression? If so, no mangling is necessary either... */
+ if (allow_globs == UNIT_NAME_GLOB &&
+ string_is_glob(name) &&
+ in_charset(name, VALID_CHARS_GLOB))
+ goto good;
if (is_device_path(name)) {
r = unit_name_from_path(name, ".device", ret);
@@ -664,11 +676,21 @@ int unit_name_mangle_with_suffix(const char *name, UnitNameMangle allow_globs, c
t = do_escape_mangle(name, allow_globs, s);
*t = 0;
- if (unit_name_to_type(s) < 0)
+ /* Append a suffix if it doesn't have any, but only if this is not a glob, so that we can allow "foo.*" as a
+ * valid glob. */
+ if ((allow_globs != UNIT_NAME_GLOB || !string_is_glob(s)) && unit_name_to_type(s) < 0)
strcpy(t, suffix);
*ret = s;
return 1;
+
+good:
+ s = strdup(name);
+ if (!s)
+ return -ENOMEM;
+
+ *ret = s;
+ return 0;
}
int slice_build_parent_slice(const char *slice, char **ret) {
diff --git a/src/test/test-unit-name.c b/src/test/test-unit-name.c
index 399d519..31870ed 100644
--- a/src/test/test-unit-name.c
+++ b/src/test/test-unit-name.c
@@ -156,34 +156,40 @@ static void test_unit_name_to_path(void) {
test_unit_name_to_path_one("home/foo", NULL, -EINVAL);
}
-static void test_unit_name_mangle_one(const char *pattern, const char *expect, int ret) {
+static void test_unit_name_mangle_one(UnitNameMangle allow_globs, const char *pattern, const char *expect, int ret) {
_cleanup_free_ char *t = NULL;
- assert_se(unit_name_mangle(pattern, UNIT_NAME_NOGLOB, &t) == ret);
+ assert_se(unit_name_mangle(pattern, allow_globs, &t) == ret);
puts(strna(t));
assert_se(streq_ptr(t, expect));
if (t) {
_cleanup_free_ char *k = NULL;
- assert_se(unit_name_is_valid(t, UNIT_NAME_ANY));
+ assert_se(unit_name_is_valid(t, UNIT_NAME_ANY) ||
+ (allow_globs == UNIT_NAME_GLOB && string_is_glob(t)));
- assert_se(unit_name_mangle(t, UNIT_NAME_NOGLOB, &k) == 0);
+ assert_se(unit_name_mangle(t, allow_globs, &k) == 0);
assert_se(streq_ptr(t, k));
}
}
static void test_unit_name_mangle(void) {
puts("-------------------------------------------------");
- test_unit_name_mangle_one("foo.service", "foo.service", 0);
- test_unit_name_mangle_one("/home", "home.mount", 1);
- test_unit_name_mangle_one("/dev/sda", "dev-sda.device", 1);
- test_unit_name_mangle_one("üxknürz.service", "\\xc3\\xbcxkn\\xc3\\xbcrz.service", 1);
- test_unit_name_mangle_one("foobar-meh...waldi.service", "foobar-meh...waldi.service", 0);
- test_unit_name_mangle_one("_____####----.....service", "_____\\x23\\x23\\x23\\x23----.....service", 1);
- test_unit_name_mangle_one("_____##@;;;,,,##----.....service", "_____\\x23\\x23@\\x3b\\x3b\\x3b\\x2c\\x2c\\x2c\\x23\\x23----.....service", 1);
- test_unit_name_mangle_one("xxx@@@@/////\\\\\\\\\\yyy.service", "xxx@@@@-----\\\\\\\\\\yyy.service", 1);
- test_unit_name_mangle_one("", NULL, -EINVAL);
+ test_unit_name_mangle_one(UNIT_NAME_NOGLOB, "foo.service", "foo.service", 0);
+ test_unit_name_mangle_one(UNIT_NAME_NOGLOB, "/home", "home.mount", 1);
+ test_unit_name_mangle_one(UNIT_NAME_NOGLOB, "/dev/sda", "dev-sda.device", 1);
+ test_unit_name_mangle_one(UNIT_NAME_NOGLOB, "üxknürz.service", "\\xc3\\xbcxkn\\xc3\\xbcrz.service", 1);
+ test_unit_name_mangle_one(UNIT_NAME_NOGLOB, "foobar-meh...waldi.service", "foobar-meh...waldi.service", 0);
+ test_unit_name_mangle_one(UNIT_NAME_NOGLOB, "_____####----.....service", "_____\\x23\\x23\\x23\\x23----.....service", 1);
+ test_unit_name_mangle_one(UNIT_NAME_NOGLOB, "_____##@;;;,,,##----.....service", "_____\\x23\\x23@\\x3b\\x3b\\x3b\\x2c\\x2c\\x2c\\x23\\x23----.....service", 1);
+ test_unit_name_mangle_one(UNIT_NAME_NOGLOB, "xxx@@@@/////\\\\\\\\\\yyy.service", "xxx@@@@-----\\\\\\\\\\yyy.service", 1);
+ test_unit_name_mangle_one(UNIT_NAME_NOGLOB, "", NULL, -EINVAL);
+
+ test_unit_name_mangle_one(UNIT_NAME_GLOB, "foo.service", "foo.service", 0);
+ test_unit_name_mangle_one(UNIT_NAME_GLOB, "foo", "foo.service", 1);
+ test_unit_name_mangle_one(UNIT_NAME_GLOB, "foo*", "foo*", 0);
+ test_unit_name_mangle_one(UNIT_NAME_GLOB, "ü*", "\\xc3\\xbc*", 1);
}
static int test_unit_printf(void) {
--
2.5.0
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