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[PATCH 5/6] bugreport.c: tweak cmd_bugreport() to use __attribute__((printf))

From
Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Date
Jul 10, 2021, 08:47 UTC
Message-ID
<patch-5.6-daca344a165-20210710T084445Z-avarab@gmail.com>
In-Reply-To
<cover-0.6-00000000000-20210710T084445Z-avarab@gmail.com>

As noted in the preceding commit we had no __attribute__((format)) check for strbuf_addftime(), and furthermore had no in-tree user that passed it a fixed string.

Let's tweak this codepath added in 238b439d698 (bugreport: add tool to generate debugging info, 2020-04-16) to make use of the compile-time check.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 builtin/bugreport.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/builtin/bugreport.c b/builtin/bugreport.c
index 9915a5841de..02edfb9a047 100644
--- a/builtin/bugreport.c
+++ b/builtin/bugreport.c
@@ -127,7 +127,7 @@ int cmd_bugreport(int argc, const char **argv, const char *prefix)
 	time_t now = time(NULL);
 	struct tm tm;
 	char *option_output = NULL;
-	char *option_suffix = "%Y-%m-%d-%H%M";
+	char *option_suffix = NULL;
 	const char *user_relative_path = NULL;
 	char *prefixed_filename;
 
@@ -149,7 +149,14 @@ int cmd_bugreport(int argc, const char **argv, const char *prefix)
 	strbuf_complete(&report_path, '/');
 
 	strbuf_addstr(&report_path, "git-bugreport-");
-	strbuf_addftime(&report_path, option_suffix, localtime_r(&now, &tm), 0, 0);
+	/*
+	 * This is an if/else for the benefit of the compile-time
+	 * strftime() format checking we have for strbuf_addftime().
+	 */
+	if (option_suffix)
+		strbuf_addftime(&report_path, option_suffix, localtime_r(&now, &tm), 0, 0);
+	else
+		strbuf_addftime(&report_path, "%Y-%m-%d-%H%M", localtime_r(&now, &tm), 0, 0);
 	strbuf_addstr(&report_path, ".txt");
 
 	switch (safe_create_leading_directories(report_path.buf)) {
-- 
2.32.0.636.g43e71d69cff
Previous: Ævar Arnfjörð BjarmasonNext: Junio C Hamano
Message 4 of 33 in “add missing __attribute__((format))”
  1. 0/6 add missing __attribute__((format))Ævar Arnfjörð Bjarmason, Jul 10, 2021
  2. 1/6 *.c static functions: don't forward-declare __attribute__Ævar Arnfjörð Bjarmason, Jul 10, 2021
  3. 3/6 *.c static functions: add missing __attribute__((format))Ævar Arnfjörð Bjarmason, Jul 10, 2021
  4. 5/6 bugreport.c: tweak cmd_bugreport() to use __attribute__((printf))Ævar Arnfjörð Bjarmason, Jul 10, 2021
  5. Junio C HamanoJul 12, 2021
  6. 2/6 sequencer.c: move static function to avoid forward declÆvar Arnfjörð Bjarmason, Jul 10, 2021
  7. 6/6 git-compat-util.h: add __attribute__((printf)) to git_*printf*Ævar Arnfjörð Bjarmason, Jul 10, 2021
  8. Jeff KingJul 12, 2021
  9. Randall S. BeckerJul 12, 2021
  10. Jeff KingJul 12, 2021
  11. Randall S. BeckerJul 12, 2021
  12. 4/6 *.h: add a few missing __attribute__((format))Ævar Arnfjörð Bjarmason, Jul 10, 2021
  13. Ævar Arnfjörð BjarmasonJul 11, 2021
  14. Jeff KingJul 12, 2021
  15. Jeff KingJul 12, 2021
  16. 0/6 add missing __attribute__((format))Ævar Arnfjörð Bjarmason, Jul 13, 2021
  17. 1/6 *.c static functions: don't forward-declare __attribute__Ævar Arnfjörð Bjarmason, Jul 13, 2021
  18. 2/6 sequencer.c: move static function to avoid forward declÆvar Arnfjörð Bjarmason, Jul 13, 2021
  19. 3/6 *.c static functions: add missing __attribute__((format))Ævar Arnfjörð Bjarmason, Jul 13, 2021
  20. 4/6 *.h: add a few missing __attribute__((format))Ævar Arnfjörð Bjarmason, Jul 13, 2021
  21. 5/6 advice.h: add missing __attribute__((format)) & fix usageÆvar Arnfjörð Bjarmason, Jul 13, 2021
  22. 6/6 strbuf.h: add a comment about "missing" strftime() checkingÆvar Arnfjörð Bjarmason, Jul 13, 2021
  23. Jeff KingJul 13, 2021
  24. Jeff KingJul 13, 2021
  25. Junio C HamanoJul 13, 2021
  26. Ævar Arnfjörð BjarmasonJul 13, 2021
  27. 0/5 add missing __attribute__((format))Ævar Arnfjörð Bjarmason, Jul 14, 2021
  28. 1/5 *.c static functions: don't forward-declare __attribute__Ævar Arnfjörð Bjarmason, Jul 14, 2021
  29. 2/5 sequencer.c: move static function to avoid forward declÆvar Arnfjörð Bjarmason, Jul 14, 2021
  30. 3/5 *.c static functions: add missing __attribute__((format))Ævar Arnfjörð Bjarmason, Jul 14, 2021
  31. 5/5 advice.h: add missing __attribute__((format)) & fix usageÆvar Arnfjörð Bjarmason, Jul 14, 2021
  32. 4/5 *.h: add a few missing __attribute__((format))Ævar Arnfjörð Bjarmason, Jul 14, 2021
  33. Junio C HamanoJul 14, 2021

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