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| author | Alejandro Colomar <alx@kernel.org> | 2024-04-26 15:06:49 +0200 |
|---|---|---|
| committer | Alejandro Colomar <alx@kernel.org> | 2024-05-02 01:24:19 +0200 |
| commit | dcde2f70372b49ec43efc5db864c9ff585d0a2dd (patch) | |
| tree | 78b9b7425130e4a5858e4c01a524d802423879ed /man/man3/timeradd.3 | |
| parent | 12aca537ce78a41bbcdaf485209691e10f8002d7 (diff) | |
| download | man-pages-dcde2f70372b49ec43efc5db864c9ff585d0a2dd.tar.gz | |
man/, share/mk/: Move man*/ to man/
This is a scripted change:
$ mkdir man/;
$ mv man* man/;
$ ln -st . man/man*;
$ find share/mk/ -type f \
| xargs grep -l '^MANDIR *:=' \
| xargs sed -i '/^MANDIR *:=/s,$,/man,';
$ find share/mk/dist/ -type f \
| xargs grep -l man \
| xargs sed -i 's,man%,man/%,g';
Link: <https://lore.kernel.org/linux-man/YxcV4h+Xn7cd6+q2@pevik/T/>
Cc: Petr Vorel <pvorel@suse.cz>
Cc: Jakub Wilk <jwilk@jwilk.net>
Cc: Stefan Puiu <stefan.puiu@gmail.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>
Diffstat (limited to 'man/man3/timeradd.3')
| -rw-r--r-- | man/man3/timeradd.3 | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/man/man3/timeradd.3 b/man/man3/timeradd.3 new file mode 100644 index 0000000000..2a34dbacdf --- /dev/null +++ b/man/man3/timeradd.3 @@ -0,0 +1,143 @@ +.\" Copyright (c) 2007 by Michael Kerrisk <mtk.manpages@gmail.com> +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.\" 2007-07-31, mtk, Created +.\" +.TH timeradd 3 (date) "Linux man-pages (unreleased)" +.SH NAME +timeradd, timersub, timercmp, timerclear, timerisset \- timeval operations +.SH LIBRARY +Standard C library +.RI ( libc ", " \-lc ) +.SH SYNOPSIS +.nf +.B #include <sys/time.h> +.P +.BI "void timeradd(struct timeval *" a ", struct timeval *" b , +.BI " struct timeval *" res ); +.BI "void timersub(struct timeval *" a ", struct timeval *" b , +.BI " struct timeval *" res ); +.P +.BI "void timerclear(struct timeval *" tvp ); +.BI "int timerisset(struct timeval *" tvp ); +.P +.BI "int timercmp(struct timeval *" a ", struct timeval *" b ", " CMP ); +.fi +.P +.RS -4 +Feature Test Macro Requirements for glibc (see +.BR feature_test_macros (7)): +.RE +.P +All functions shown above: +.nf + Since glibc 2.19: + _DEFAULT_SOURCE + glibc 2.19 and earlier: + _BSD_SOURCE +.fi +.SH DESCRIPTION +The macros are provided to operate on +.I timeval +structures, defined in +.I <sys/time.h> +as: +.P +.in +4n +.EX +struct timeval { + time_t tv_sec; /* seconds */ + suseconds_t tv_usec; /* microseconds */ +}; +.EE +.in +.P +.BR timeradd () +adds the time values in +.I a +and +.IR b , +and places the sum in the +.I timeval +pointed to by +.IR res . +The result is normalized such that +.I res\->tv_usec +has a value in the range 0 to 999,999. +.P +.BR timersub () +subtracts the time value in +.I b +from the time value in +.IR a , +and places the result in the +.I timeval +pointed to by +.IR res . +The result is normalized such that +.I res\->tv_usec +has a value in the range 0 to 999,999. +.P +.BR timerclear () +zeros out the +.I timeval +structure pointed to by +.IR tvp , +so that it represents the Epoch: 1970-01-01 00:00:00 +0000 (UTC). +.P +.BR timerisset () +returns true (nonzero) if either field of the +.I timeval +structure pointed to by +.I tvp +contains a nonzero value. +.P +.BR timercmp () +compares the timer values in +.I a +and +.I b +using the comparison operator +.IR CMP , +and returns true (nonzero) or false (0) depending on +the result of the comparison. +Some systems (but not Linux/glibc), +have a broken +.BR timercmp () +implementation, +.\" HP-UX, Tru64, Irix have a definition like: +.\"#define timercmp(tvp, uvp, cmp) \ +.\" ((tvp)->tv_sec cmp (uvp)->tv_sec || \ +.\" (tvp)->tv_sec == (uvp)->tv_sec && (tvp)->tv_usec cmp (uvp)->tv_usec) +in which +.I CMP +of +.IR >= , +.IR <= , +and +.I == +do not work; +portable applications can instead use +.P +.in +4n +.EX +!timercmp(..., <) +!timercmp(..., >) +!timercmp(..., !=) +.EE +.in +.SH RETURN VALUE +.BR timerisset () +and +.BR timercmp () +return true (nonzero) or false (0). +.SH ERRORS +No errors are defined. +.SH STANDARDS +None. +.SH HISTORY +BSD. +.SH SEE ALSO +.BR gettimeofday (2), +.BR time (7) |