On Mon, Mar 13, 2023 at 01:07:15PM +0100, Stefano Brivio wrote:

On X32 (ILP32 using AMD64 system call ABI) and glibc, struct timespec::tv_nsec is __syscall_slong_t and not a long int, see also https://sourceware.org/bugzilla/show_bug.cgi?id=16437 and timespec(3type). Fine, we could cast that down to long and be done with it.

But it turns out that also time_t (not guaranteed to be equivalent to any type) is a long long int, and there we can't downcast.

To keep it simple, cast both to long long int, and change formats to %lli, to avoid format warnings from gcc.

Signed-off-by: Stefano Brivio

Reviewed-by: David Gibson

--- log.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/log.c b/log.c index d2f08fa..d7411ba 100644 --- a/log.c +++ b/log.c @@ -53,9 +53,9 @@ void name(const char *format, ...) { \ \ if (setlogmask(0) & LOG_MASK(LOG_DEBUG) && log_file == -1) { \ clock_gettime(CLOCK_REALTIME, &tp); \ - fprintf(stderr, "%li.%04li: ", \ - tp.tv_sec - log_start, \ - tp.tv_nsec / (100L * 1000)); \ + fprintf(stderr, "%lli.%04lli: ", \ + (long long int)tp.tv_sec - log_start, \ + (long long int)tp.tv_nsec / (100L * 1000)); \ } \ \ if ((LOG_MASK(LOG_PRI(level)) & log_mask) || BEFORE_DAEMON) { \ @@ -225,8 +225,9 @@ static void logfile_rotate_fallocate(int fd, struct timespec *ts) return;

n = snprintf(buf, BUFSIZ, - "%s - log truncated at %li.%04li", log_header, - ts->tv_sec - log_start, ts->tv_nsec / (100L * 1000)); + "%s - log truncated at %lli.%04lli", log_header, + (long long int)(ts->tv_sec - log_start), + (long long int)(ts->tv_nsec / (100L * 1000)));

/* Avoid partial lines by padding the header with spaces */ nl = memchr(buf + n + 1, '\n', BUFSIZ - n - 1); @@ -256,9 +257,9 @@ static void logfile_rotate_move(int fd, struct timespec *ts) char buf[BUFSIZ], *nl;

header_len = snprintf(buf, BUFSIZ, - "%s - log truncated at %li.%04li\n", log_header, - ts->tv_sec - log_start, - ts->tv_nsec / (100L * 1000)); + "%s - log truncated at %lli.%04lli\n", log_header, + (long long int)(ts->tv_sec - log_start), + (long long int)(ts->tv_nsec / (100L * 1000))); if (lseek(fd, 0, SEEK_SET) == -1) return; if (write(fd, buf, header_len) == -1) @@ -349,8 +350,9 @@ void logfile_write(int pri, const char *format, va_list ap) if (clock_gettime(CLOCK_REALTIME, &ts)) return;

- n = snprintf(buf, BUFSIZ, "%li.%04li: %s", - ts.tv_sec - log_start, ts.tv_nsec / (100L * 1000), + n = snprintf(buf, BUFSIZ, "%lli.%04lli: %s", + (long long int)(ts.tv_sec - log_start), + (long long int)(ts.tv_nsec / (100L * 1000)), logfile_prefix[pri]);

n += vsnprintf(buf + n, BUFSIZ - n, format, ap);

-- David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson