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Document what happens when the format string contains insufficient

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conversion specifications to completely specify the resulting struct tm.

PR:		46331
Submitted by:	Christian S.J. Peron
MFC after:	2 weeks
This commit is contained in:
Tim J. Robbins 2002-12-18 05:00:54 +00:00
parent bd82dc7460
commit e4ceb70f7a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=108013
1 changed files with 23 additions and 0 deletions
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23
lib/libc/stdtime/strptime.3
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@ -71,6 +71,29 @@ and
are now interpreted as beginning at 1969 per POSIX requirements.
Years 69-00 are interpreted in the 20th century (1969-2000), years
01-68 in the 21st century (2001-2068).
.Pp
If the
.Fa format
string does not contain enough conversion specifications to completely
specify the resulting
.Vt struct tm ,
the unspecified members of
.Va timeptr
are left untouched.
For example, if
.Fa format
is
.Dq Ql "%H:%M:%S" ,
only
.Va tm_hour ,
.Va tm_sec
and
.Va tm_min
will be modified.
If time relative to today is desired, initialize the
.Fa timeptr
structure with today's date before passing it to
.Fn strptime .
.Sh RETURN VALUES
Upon successful completion,
.Fn strptime