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-rw-r--r--Makefile8
-rw-r--r--compat/gmtime.c29
-rw-r--r--config.mak.uname1
-rw-r--r--git-compat-util.h7
4 files changed, 45 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 598d631..da7013b 100644
--- a/Makefile
+++ b/Makefile
@@ -342,6 +342,9 @@ all::
# Define DEFAULT_HELP_FORMAT to "man", "info" or "html"
# (defaults to "man") if you want to have a different default when
# "git help" is called without a parameter specifying the format.
+#
+# Define GMTIME_UNRELIABLE_ERRORS if your gmtime() function does not
+# return NULL when it receives a bogus time_t.
GIT-VERSION-FILE: FORCE
@$(SHELL_PATH) ./GIT-VERSION-GEN
@@ -1464,6 +1467,11 @@ ifneq (,$(XDL_FAST_HASH))
BASIC_CFLAGS += -DXDL_FAST_HASH
endif
+ifdef GMTIME_UNRELIABLE_ERRORS
+ COMPAT_OBJS += compat/gmtime.o
+ BASIC_CFLAGS += -DGMTIME_UNRELIABLE_ERRORS
+endif
+
ifeq ($(TCLTK_PATH),)
NO_TCLTK = NoThanks
endif
diff --git a/compat/gmtime.c b/compat/gmtime.c
new file mode 100644
index 0000000..e8362dd
--- /dev/null
+++ b/compat/gmtime.c
@@ -0,0 +1,29 @@
+#include "../git-compat-util.h"
+#undef gmtime
+#undef gmtime_r
+
+struct tm *git_gmtime(const time_t *timep)
+{
+ static struct tm result;
+ return git_gmtime_r(timep, &result);
+}
+
+struct tm *git_gmtime_r(const time_t *timep, struct tm *result)
+{
+ struct tm *ret;
+
+ memset(result, 0, sizeof(*result));
+ ret = gmtime_r(timep, result);
+
+ /*
+ * Rather than NULL, FreeBSD gmtime simply leaves the "struct tm"
+ * untouched when it encounters overflow. Since "mday" cannot otherwise
+ * be zero, we can test this very quickly.
+ */
+ if (ret && !ret->tm_mday) {
+ ret = NULL;
+ errno = EOVERFLOW;
+ }
+
+ return ret;
+}
diff --git a/config.mak.uname b/config.mak.uname
index e09af8f..94cc108 100644
--- a/config.mak.uname
+++ b/config.mak.uname
@@ -189,6 +189,7 @@ ifeq ($(uname_S),FreeBSD)
endif
PYTHON_PATH = /usr/local/bin/python
HAVE_PATHS_H = YesPlease
+ GMTIME_UNRELIABLE_ERRORS = UnfortunatelyYes
endif
ifeq ($(uname_S),OpenBSD)
NO_STRCASESTR = YesPlease
diff --git a/git-compat-util.h b/git-compat-util.h
index ad47624..6672814 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -697,4 +697,11 @@ void warn_on_inaccessible(const char *path);
/* Get the passwd entry for the UID of the current process. */
struct passwd *xgetpwuid_self(void);
+#ifdef GMTIME_UNRELIABLE_ERRORS
+struct tm *git_gmtime(const time_t *);
+struct tm *git_gmtime_r(const time_t *, struct tm *);
+#define gmtime git_gmtime
+#define gmtime_r git_gmtime_r
+#endif
+
#endif