systemd/SOURCES/0259-core-transaction-make-...

58 lines
1.9 KiB
Diff

From 1c7d14785d8975df5f6400d22fa5eae4693f7288 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Sat, 18 Mar 2023 12:12:01 +0900
Subject: [PATCH] core/transaction: make merge_unit_ids() always return
NUL-terminated string
Follow-up for 924775e8ce49817f96df19c2b06356c12ecfc754.
The loop run with `STRV_FOREACH_PAIR()`, hence `if (*(unit_id+1))` is
not a good way to detect if there exist a next entry.
Fixes #26872.
(cherry picked from commit 366eced4c81a15a25b9225347fa203aa67798b02)
Related: #2170883
---
src/core/transaction.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
diff --git a/src/core/transaction.c b/src/core/transaction.c
index 8ec853d58d..043998078c 100644
--- a/src/core/transaction.c
+++ b/src/core/transaction.c
@@ -323,22 +323,25 @@ _pure_ static bool unit_matters_to_anchor(Unit *u, Job *job) {
return false;
}
-static char* merge_unit_ids(const char* unit_log_field, char **pairs) {
- char *ans = NULL;
- size_t size = 0, next;
+static char* merge_unit_ids(const char* unit_log_field, char * const* pairs) {
+ _cleanup_free_ char *ans = NULL;
+ size_t size = 0;
STRV_FOREACH_PAIR(unit_id, job_type, pairs) {
+ size_t next;
+
+ if (size > 0)
+ ans[size - 1] = '\n';
+
next = strlen(unit_log_field) + strlen(*unit_id);
if (!GREEDY_REALLOC(ans, size + next + 1))
- return mfree(ans);
+ return NULL;
sprintf(ans + size, "%s%s", unit_log_field, *unit_id);
- if (*(unit_id+1))
- ans[size + next] = '\n';
size += next + 1;
}
- return ans;
+ return TAKE_PTR(ans);
}
static int transaction_verify_order_one(Transaction *tr, Job *j, Job *from, unsigned generation, sd_bus_error *e) {