curl_getdate(3) libcurl Manual curl_getdate(3)
curl_getdate - Convert an date in a ASCII string to number of seconds since January 1,
time_t curl_getdate(char *datestring, time_t *now");
This function returns the number of seconds since January 1st 1970, for the date and time
that the datestring parameter specifies. The now parameter is there and should hold the
current time to allow the datestring to specify relative dates/times. Read further in the
date string parser section below.
PARSING DATES AND TIMES
A "date" is a string, possibly empty, containing many items separated by whitespace. The
whitespace may be omitted when no ambiguity arises. The empty string means the beginning
of today (i.e., midnight). Order of the items is immaterial. A date string may contain
many flavors of items:
calendar date items
This can be specified in a number of different ways. Including 1970-09-17,
70-9-17, 70-09-17, 9/17/72, 24 September 1972, 24 Sept 72, 24 Sep 72, Sep 24,
1972, 24-sep-72, 24sep72. The year can also be omitted, for example: 9/17 or "sep
time of the day items
This string specifies the time on a given day. Syntax supported includes: 18:19:0,
18:19, 6:19pm, 18:19-0500 (for specifying the time zone as well).
time zone items
Specifies international time zone. There are a few acronyms supported, but in gen-
eral you should instead use the specific realtive time compared to UTC. Supported
formats include: -1200, MST, +0100.
day of the week items
Specifies a day of the week. If this is mentioned alone it means that day of the
week in the future.
Days of the week may be spelled out in full: `Sunday', `Monday', etc or they may
be abbreviated to their first three letters, optionally followed by a period. The
special abbreviations `Tues' for `Tuesday', `Wednes' for `Wednesday' and `Thur' or
`Thurs' for `Thursday' are also allowed.
A number may precede a day of the week item to move forward supplementary weeks.
It is best used in expression like `third monday'. In this context, `last DAY' or
`next DAY' is also acceptable; they move one week before or after the day that DAY
by itself would represent.
A relative item adjusts a date (or the current date if none) forward or backward.
Example syntax includes: "1 year", "1 year ago", "2 days", "4 weeks".
The string `tomorrow' is worth one day in the future (equivalent to `day'), the
string `yesterday' is worth one day in the past (equivalent to `day ago').
If the decimal number is of the form YYYYMMDD and no other calendar date item
appears before it in the date string, then YYYY is read as the year, MM as the
month number and DD as the day of the month, for the specified calendar date.
This function returns zero when it fails to parse the date string. Otherwise it returns
the number of seconds as described.
Originally written by Steven M. Bellovin <firstname.lastname@example.org> while at the University of
North Carolina at Chapel Hill. Later tweaked by a couple of people on Usenet. Completely
overhauled by Rich $alz <email@example.com> and Jim Berets <firstname.lastname@example.org> in August, 1990.
Surely there are some, you tell me!
libcurl 7.0 5 March 2001 curl_getdate(3)