From 4f6460df55cdccdda9d2a0aad4c6b578c007e01a Mon Sep 17 00:00:00 2001
From: Taylor Blau <me@ttaylorr.com>
Date: Mon, 30 Nov 2020 19:30:06 -0500
Subject: [PATCH] builtin/bugreport.c: use thread-safe localtime_r()
To generate its filename, the 'git bugreport' builtin asks the system
for the current time with 'localtime()'. Since this uses a shared
buffer, it is not thread-safe.
Even though 'git bugreport' is not multi-threaded, using localtime() can
trigger some static analysis tools to complain, and a quick
$ git grep -oh 'localtime\(_.\)\?' -- **/*.c | sort | uniq -c
shows that the only usage of the thread-unsafe 'localtime' is in a piece
of documentation.
So, convert this instance to use the thread-safe version for
consistency, and to appease some analysis tools.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
builtin/bugreport.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/builtin/bugreport.c b/builtin/bugreport.c
index 3ad4b9b62e..ad3cc9c02f 100644
--- a/builtin/bugreport.c
+++ b/builtin/bugreport.c
@@ -125,6 +125,7 @@ int cmd_bugreport(int argc, const char **argv, const char *prefix)
struct strbuf report_path = STRBUF_INIT;
int report = -1;
time_t now = time(NULL);
+ struct tm tm;
char *option_output = NULL;
char *option_suffix = "%Y-%m-%d-%H%M";
const char *user_relative_path = NULL;
@@ -147,7 +148,7 @@ 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(&now), 0, 0);
+ strbuf_addftime(&report_path, option_suffix, localtime_r(&now, &tm), 0, 0);
strbuf_addstr(&report_path, ".txt");
switch (safe_create_leading_directories(report_path.buf)) {