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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:40:15 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:40:15 +0000 |
commit | 399644e47874bff147afb19c89228901ac39340e (patch) | |
tree | 1c4c0b733f4c16b5783b41bebb19194a9ef62ad1 /man3type/time_t.3type | |
parent | Initial commit. (diff) | |
download | manpages-399644e47874bff147afb19c89228901ac39340e.tar.xz manpages-399644e47874bff147afb19c89228901ac39340e.zip |
Adding upstream version 6.05.01.upstream/6.05.01
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'man3type/time_t.3type')
-rw-r--r-- | man3type/time_t.3type | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/man3type/time_t.3type b/man3type/time_t.3type new file mode 100644 index 0000000..2b087e5 --- /dev/null +++ b/man3type/time_t.3type @@ -0,0 +1,109 @@ +.\" Copyright (c) 2020-2022 by Alejandro Colomar <alx@kernel.org> +.\" and Copyright (c) 2020 by Michael Kerrisk <mtk.manpages@gmail.com> +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.\" +.TH time_t 3type 2023-03-31 "Linux man-pages 6.05.01" +.SH NAME +time_t, suseconds_t, useconds_t \- integer time +.SH LIBRARY +Standard C library +.RI ( libc ) +.SH SYNOPSIS +.nf +.B #include <time.h> +.PP +.BR typedef " /* ... */ " time_t; +.PP +.B #include <sys/types.h> +.PP +.BR typedef " /* ... */ " suseconds_t; +.BR typedef " /* ... */ " useconds_t; +.fi +.SH DESCRIPTION +.TP +.I time_t +Used for time in seconds. +According to POSIX, +it is an integer type. +.\" In POSIX.1-2001, the type was specified as being either an integer +.\" type or a real-floating type. However, existing implementations +.\" used an integer type, and POSIX.1-2008 tightened the specification +.\" to reflect this. +.TP +.I suseconds_t +Used for time in microseconds. +It is a signed integer type +capable of storing values at least in the range +.RB [ \-1 , +.BR 1000000 ]. +.TP +.I useconds_t +Used for time in microseconds. +It is an unsigned integer type +capable of storing values at least in the range +.RB [ 0 , +.BR 1000000 ]. +.SH STANDARDS +.TP +.I time_t +C11, POSIX.1-2008. +.TP +.I suseconds_t +.TQ +.I useconds_t +POSIX.1-2008. +.PD +.SH HISTORY +.TP +.I time_t +C89, POSIX.1-2001. +.TP +.I suseconds_t +.TQ +.I useconds_t +POSIX.1-2001. +.PP +.I <sched.h> +defines +.I time_t +since POSIX.1-2008. +.PP +POSIX.1-2001 defined +.I useconds_t +in +.I <unistd.h> +too. +.SH NOTES +On some architectures, +the width of +.I time_t +can be controlled with the feature test macro +.BR _TIME_BITS . +.PP +The following headers also provide +.IR time_t : +.IR <sched.h> , +.IR <sys/msg.h> , +.IR <sys/select.h> , +.IR <sys/sem.h> , +.IR <sys/shm.h> , +.IR <sys/stat.h> , +.IR <sys/time.h> , +.IR <sys/types.h> , +and +.IR <utime.h> . +.PP +The following headers also provide +.IR suseconds_t : +.I <sys/select.h> +and +.IR <sys/time.h> . +.SH SEE ALSO +.BR stime (2), +.BR time (2), +.BR ctime (3), +.BR difftime (3), +.BR usleep (3), +.BR timeval (3type) |