diff options
Diffstat (limited to 'lib/strftime.h')
-rw-r--r-- | lib/strftime.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/strftime.h b/lib/strftime.h index e8501631573..fe0c4195a59 100644 --- a/lib/strftime.h +++ b/lib/strftime.h @@ -24,7 +24,12 @@ extern "C" { /* Just like strftime, but with two more arguments: POSIX requires that strftime use the local timezone information. Use the timezone __TZ instead. Use __NS as the number of - nanoseconds in the %N directive. */ + nanoseconds in the %N directive. + + On error, set errno and return 0. Otherwise, return the number of + bytes generated (not counting the trailing NUL), preserving errno + if the number is 0. This errno behavior is in draft POSIX 202x + plus some requested changes to POSIX. */ size_t nstrftime (char *restrict, size_t, char const *, struct tm const *, timezone_t __tz, int __ns); |