Hi Walter,
Thanks for the page! Please see some comments below (I'll tell you more
in the next iteration).
Cheers,
Alex
P.S.: How's it going with the other page you were working on? :)
On 4/24/21 7:41 PM, Walter Harms wrote:
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.ds N1 The example is simplified code and not production ready.
.de N2
.SH COLOPHON
This page is part of release 4.16 of the Linux
4.16? :)
.I man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
\%https://www.kernel.org/doc/man\-pages/.
..
You can remove the COLOPHON. It is automatically created at release time.
.TH timespec_get 1 "2021-04-20" Linux "User Manuals"
Please, see `man 7 man-pages`, subsection 'Title line'.
.SH NAME
timespec_get \- get time in high resolution
"high resolution" is relative. It's like when you call Y is the "new
X"... until it gets old. I'd prefer expressing something like "get time
in seconds and nanoseconds", don't you?
.SH SYNOPSIS
.B #include <time.h>
.PP
.BI "int timespec_get( struct timespec *"ts ", int " base ");"
Don't add extra spaces inside the parentheses '( xxx', just like you'd
do in normal english.
If there are no spaces, there's no need for using quotes: '");"' == ');'.
Also, use spaces to separate arguments to '.BI' always.
.BI "int timespec_get(struct timespec *" ts ", int " base );
.SH DESCRIPTION
The function
.B timespec_get()
will fill
No need to use future here. 'fills' is simpler.
.I ts
wth the current time. The argument is a
'The argument': I think I prefer to mention the argument name.
s/The argument /\n.I ts\n/?
.I struct timespec
what is specified like:
.nf
Please, see `man 7 man-pages`, subsection 'Indentation of structure
definitions, shell session logs, and so on'.
struct timespec
{
time_t tv_sec; /* Seconds. */
long tv_nsec; /* Nanoseconds. */
Please, align comments.
};
.fi
The elements of the struct hold the seconds and nanoseconds since epoch.
The system clock will round the nanosecond argument.
.PP
The second argument
.B base
indicate the time base. POSIX requieres
.I TIME_UTC
only. All others are implementation defined.
.SH RETURN VALUE
The function will return
.I base
or 0 for failure.
.SH EXAMPLE
The example program will show the current time
in YYYY-MM-DD hh:mm:ss and then the nanoseconds .
.EX
/* compile with:
* gcc timespec.c -o timespec
*/
#include <stdio.h>
#include <time.h>
int main(void)
{
struct timespec ts;
char buf[30];
timespec_get(&ts, TIME_UTC);
strftime(buf, sizeof(buf), "%F %T", gmtime(&ts.tv_sec));
printf("Current time: %s ", buf);
printf("UTC and %ld nsec\\n", ts.tv_nsec);
return (0);
}
.EE
\*(N1
.SH NOTE
This function is equal to the POSIX function
.BR "clock_gettime(CLOCK_REALTIME, ts)" .
.PP
The ts.tv_sec is equal to the return value of
.BR time(NULL) .
.SH "CONFORMING TO"
The function is a C11 requirement and appears first time in
.BR "glibc 2.16 " .
.SH "SEE ALSO"
.BR clock_gettime(3) ,
.BR time (2),
.BR time (7)
\*(N2
--
Alejandro Colomar
Linux man-pages comaintainer; https://www.kernel.org/doc/man-pages/
http://www.alejandro-colomar.es/
