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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 19:41:07 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 19:41:07 +0000
commit3af6d22bb3850ab2bac67287e3a3d3b0e32868e5 (patch)
tree3ee7a3ec64525911fa865bb984c86d997d855527 /man3/ctime.3
parentAdding debian version 6.05.01-1. (diff)
downloadmanpages-3af6d22bb3850ab2bac67287e3a3d3b0e32868e5.tar.xz
manpages-3af6d22bb3850ab2bac67287e3a3d3b0e32868e5.zip
Merging upstream version 6.7.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'man3/ctime.3')
-rw-r--r--man3/ctime.355
1 files changed, 27 insertions, 28 deletions
diff --git a/man3/ctime.3 b/man3/ctime.3
index 4dc72f2..817e964 100644
--- a/man3/ctime.3
+++ b/man3/ctime.3
@@ -13,7 +13,7 @@
.\" Modified 2001-12-13, joey, aeb
.\" Modified 2004-11-16, mtk
.\"
-.TH ctime 3 2023-07-20 "Linux man-pages 6.05.01"
+.TH ctime 3 2023-10-31 "Linux man-pages 6.7"
.SH NAME
asctime, ctime, gmtime, localtime, mktime, asctime_r, ctime_r, gmtime_r,
localtime_r \- transform date and time to broken-down time or ASCII
@@ -23,31 +23,31 @@ Standard C library
.SH SYNOPSIS
.nf
.B #include <time.h>
-.PP
+.P
.BI "char *asctime(const struct tm *" tm );
.BI "char *asctime_r(const struct tm *restrict " tm ,
.BI " char " buf "[restrict 26]);"
-.PP
+.P
.BI "char *ctime(const time_t *" timep );
.BI "char *ctime_r(const time_t *restrict " timep ,
.BI " char " buf "[restrict 26]);"
-.PP
+.P
.BI "struct tm *gmtime(const time_t *" timep );
.BI "struct tm *gmtime_r(const time_t *restrict " timep ,
.BI " struct tm *restrict " result );
-.PP
+.P
.BI "struct tm *localtime(const time_t *" timep );
.BI "struct tm *localtime_r(const time_t *restrict " timep ,
.BI " struct tm *restrict " result );
-.PP
+.P
.BI "time_t mktime(struct tm *" tm );
.fi
-.PP
+.P
.RS -4
Feature Test Macro Requirements for glibc (see
.BR feature_test_macros (7)):
.RE
-.PP
+.P
.BR asctime_r (),
.BR ctime_r (),
.BR gmtime_r (),
@@ -66,7 +66,7 @@ functions all take
an argument of data type \fItime_t\fP, which represents calendar time.
When interpreted as an absolute time value, it represents the number of
seconds elapsed since the Epoch, 1970-01-01 00:00:00 +0000 (UTC).
-.PP
+.P
The
.BR asctime ()
and
@@ -74,25 +74,25 @@ and
functions both take an argument
representing broken-down time, which is a representation
separated into year, month, day, and so on.
-.PP
+.P
Broken-down time is stored in the structure
.IR tm ,
described in
.BR tm (3type).
-.PP
+.P
The call
.BI ctime( t )
is equivalent to
.BI asctime(localtime( t )) \fR.
It converts the calendar time \fIt\fP into a
null-terminated string of the form
-.PP
+.P
.in +4n
.EX
"Wed Jun 30 21:49:08 1993\en"
.EE
.in
-.PP
+.P
The abbreviations for the days of the week are "Sun", "Mon", "Tue", "Wed",
"Thu", "Fri", and "Sat".
The abbreviations for the months are "Jan",
@@ -112,7 +112,7 @@ string in a user-supplied buffer
which should have room for at least 26 bytes.
It need not
set \fItzname\fP, \fItimezone\fP, and \fIdaylight\fP.
-.PP
+.P
The
.BR gmtime ()
function converts the calendar time \fItimep\fP to
@@ -125,7 +125,7 @@ The
.BR gmtime_r ()
function does the same, but stores the data in a
user-supplied struct.
-.PP
+.P
The
.BR localtime ()
function converts the calendar time \fItimep\fP to
@@ -145,7 +145,7 @@ The
function does the same, but stores the data in a
user-supplied struct.
It need not set \fItzname\fP, \fItimezone\fP, and \fIdaylight\fP.
-.PP
+.P
The
.BR asctime ()
function converts the broken-down time value
@@ -157,7 +157,7 @@ The
.BR asctime_r ()
function does the same, but stores the string in
a user-supplied buffer which should have room for at least 26 bytes.
-.PP
+.P
The
.BR mktime ()
function converts a broken-down time structure, expressed
@@ -182,7 +182,7 @@ and a negative value means that
.BR mktime ()
should (use timezone information and system databases to)
attempt to determine whether DST is in effect at the specified time.
-.PP
+.P
The
.BR mktime ()
function modifies the fields of the
@@ -202,7 +202,7 @@ Calling
.BR mktime ()
also sets the external variable \fItzname\fP with
information about the current timezone.
-.PP
+.P
If the specified broken-down
time cannot be represented as calendar time (seconds since the Epoch),
.BR mktime ()
@@ -217,33 +217,33 @@ and
.BR localtime ()
return a pointer to a
.IR "struct\ tm" .
-.PP
+.P
On success,
.BR gmtime_r ()
and
.BR localtime_r ()
return the address of the structure pointed to by
.IR result .
-.PP
+.P
On success,
.BR asctime ()
and
.BR ctime ()
return a pointer to a string.
-.PP
+.P
On success,
.BR asctime_r ()
and
.BR ctime_r ()
return a pointer to the string pointed to by
.IR buf .
-.PP
+.P
On success,
.BR mktime ()
returns the calendar time (seconds since the Epoch),
expressed as a value of type
.IR time_t .
-.PP
+.P
On error,
.BR mktime ()
returns the value
@@ -315,18 +315,17 @@ T} Thread safety T{
MT-Unsafe race:tmbuf env locale
T}
.TE
-.sp 1
.SH VERSIONS
POSIX doesn't specify the parameters of
.BR ctime_r ()
to be
.IR restrict ;
that is specific to glibc.
-.PP
+.P
In many implementations, including glibc, a 0 in
.I tm_mday
is interpreted as meaning the last day of the preceding month.
-.PP
+.P
According to POSIX.1-2001,
.BR localtime ()
is required to behave as though
@@ -402,7 +401,7 @@ The thread-safe versions,
and
.BR localtime_r (),
are specified by SUSv2.
-.PP
+.P
POSIX.1-2001 says:
"The
.BR asctime (),