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34 .Nd parse date and time string
41 .Fa "const char * restrict buf"
42 .Fa "const char * restrict format"
43 .Fa "struct tm * restrict timeptr"
48 function parses the string in the buffer
50 according to the string pointed to by
52 and fills in the elements of the structure pointed to by
54 The resulting values will be relative to the local time zone.
55 Thus, it can be considered the reverse operation of
60 string consists of zero or more conversion specifications and
62 All ordinary characters are matched exactly with the buffer, where
63 white space in the format string will match any amount of white space
65 All conversion specifications are identical to those described in
68 Two-digit year values, including formats
72 are now interpreted as beginning at 1969 per POSIX requirements.
73 Years 69-00 are interpreted in the 20th century (1969-2000), years
74 01-68 in the 21st century (2001-2068).
78 string does not contain enough conversion specifications to completely
81 the unspecified members of
94 If time relative to today is desired, initialize the
96 structure with today's date before passing it to
99 Upon successful completion,
101 returns the pointer to the first character in
103 that has not been required to satisfy the specified conversions in
107 if one of the conversions failed.
120 function has been contributed by Powerdog Industries.
122 This man page was written by
129 format specifiers may incorrectly scan one too many digits
130 if the intended values comprise only a single digit
131 and that digit is followed immediately by another digit.
132 Both specifiers accept zero-padded values,
133 even though they are both defined as taking unpadded values.
137 format specifier has no effect unless it is parsed
139 hour-related specifiers.
144 will produce undefined results.
156 format specifiers accept any value within the range 00 to 53
157 without validating against other values supplied (like month
158 or day of the year, for example).
162 format specifier only accepts time zone abbreviations of the local time zone,
164 This limitation is because of ambiguity due to of the over loading of time
165 zone abbreviations. One such example is
167 which is both Eastern Standard Time and Eastern Australia Summer Time.
171 function does not correctly handle multibyte characters in the