diff options
| author |  Jeff King <peff@peff.net> | 2014-04-01 17:28:42 -0400 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2014-04-01 14:39:04 -0700 |
| commit | 6654754779d2a90af91a9c6b93d7e4e7ee16cfab (patch) | |
| tree | 1b6a7851e5e1dfd88ac4705de569343dfe0f0931 | |
| parent | show_ident_date: fix tz range check (diff) | |
| download | tgif-6654754779d2a90af91a9c6b93d7e4e7ee16cfab.tar.xz | |
date: recognize bogus FreeBSD gmtime output
Most gmtime implementations return a NULL value when they
encounter an error (and this behavior is specified by ANSI C
and POSIX). FreeBSD's implementation, however, will simply
leave the "struct tm" untouched. Let's also recognize this
and convert it to a NULL (with this patch, t4212 should pass
on FreeBSD).
Reported-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
| -rw-r--r-- | Makefile | 8 | ||||
| -rw-r--r-- | compat/gmtime.c | 29 | ||||
| -rw-r--r-- | config.mak.uname | 1 | ||||
| -rw-r--r-- | git-compat-util.h | 7 |
4 files changed, 45 insertions, 0 deletions
@@ -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 ($(TCLTK_PATH),) NO_TCLTK = NoThanks endif diff --git a/compat/gmtime.c b/compat/gmtime.c new file mode 100644 index 0000000000..e8362dd2b9 --- /dev/null +++ b/compat/gmtime.c @@ -0,0 +1,29 @@ +#include "../git-compat-util.h" +#undef gmtime +#undef gmtime_r + +struct tm *git_gmtime(const time_t *timep) +{ + static struct tm result; + return git_gmtime_r(timep, &result); +} + +struct tm *git_gmtime_r(const time_t *timep, struct tm *result) +{ + struct tm *ret; + + memset(result, 0, sizeof(*result)); + ret = gmtime_r(timep, result); + + /* + * Rather than NULL, FreeBSD gmtime simply leaves the "struct tm" + * untouched when it encounters overflow. Since "mday" cannot otherwise + * be zero, we can test this very quickly. + */ + if (ret && !ret->tm_mday) { + ret = NULL; + errno = EOVERFLOW; + } + + return ret; +} diff --git a/config.mak.uname b/config.mak.uname index e09af8fc13..94cc108b4a 100644 --- a/config.mak.uname +++ b/config.mak.uname @@ -189,6 +189,7 @@ ifeq ($(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 ad4762499e..66728145b4 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 |