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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-24 04:52:22 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-24 04:52:22 +0000 |
commit | 7f3caba522f4d24764f29d83aa2de9198bb7f01c (patch) | |
tree | 66b798ea74302325d6a5c11df044cbe4bb845af1 /man3/adjtime.3 | |
parent | Adding upstream version 6.7. (diff) | |
download | manpages-7f3caba522f4d24764f29d83aa2de9198bb7f01c.tar.xz manpages-7f3caba522f4d24764f29d83aa2de9198bb7f01c.zip |
Adding upstream version 6.8.upstream/6.8upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'man3/adjtime.3')
-rw-r--r-- | man3/adjtime.3 | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/man3/adjtime.3 b/man3/adjtime.3 deleted file mode 100644 index a6fcce5..0000000 --- a/man3/adjtime.3 +++ /dev/null @@ -1,152 +0,0 @@ -'\" t -.\" Copyright (c) 2006 by Michael Kerrisk <mtk.manpages@gmail.com> -.\" -.\" SPDX-License-Identifier: Linux-man-pages-copyleft -.\" -.TH adjtime 3 2024-01-28 "Linux man-pages 6.7" -.SH NAME -adjtime \- correct the time to synchronize the system clock -.SH LIBRARY -Standard C library -.RI ( libc ", " \-lc ) -.SH SYNOPSIS -.nf -.B #include <sys/time.h> -.P -.BI "int adjtime(const struct timeval *" delta ", struct timeval *" olddelta ); -.fi -.P -.RS -4 -Feature Test Macro Requirements for glibc (see -.BR feature_test_macros (7)): -.RE -.P -.BR adjtime (): -.nf - Since glibc 2.19: - _DEFAULT_SOURCE - glibc 2.19 and earlier: - _BSD_SOURCE -.fi -.SH DESCRIPTION -The -.BR adjtime () -function gradually adjusts the system clock (as returned by -.BR gettimeofday (2)). -The amount of time by which the clock is to be adjusted is specified -in the structure pointed to by -.IR delta . -This structure has the following form: -.P -.in +4n -.EX -struct timeval { - time_t tv_sec; /* seconds */ - suseconds_t tv_usec; /* microseconds */ -}; -.EE -.in -.P -If the adjustment in -.I delta -is positive, then the system clock is speeded up by some -small percentage (i.e., by adding a small -amount of time to the clock value in each second) until the adjustment -has been completed. -If the adjustment in -.I delta -is negative, then the clock is slowed down in a similar fashion. -.P -If a clock adjustment from an earlier -.BR adjtime () -call is already in progress -at the time of a later -.BR adjtime () -call, and -.I delta -is not NULL for the later call, then the earlier adjustment is stopped, -but any already completed part of that adjustment is not undone. -.P -If -.I olddelta -is not NULL, then the buffer that it points to is used to return -the amount of time remaining from any previous adjustment that -has not yet been completed. -.SH RETURN VALUE -On success, -.BR adjtime () -returns 0. -On failure, \-1 is returned, and -.I errno -is set to indicate the error. -.SH ERRORS -.TP -.B EINVAL -The adjustment in -.I delta -is outside the permitted range. -.TP -.B EPERM -The caller does not have sufficient privilege to adjust the time. -Under Linux, the -.B CAP_SYS_TIME -capability is required. -.SH ATTRIBUTES -For an explanation of the terms used in this section, see -.BR attributes (7). -.TS -allbox; -lbx lb lb -l l l. -Interface Attribute Value -T{ -.na -.nh -.BR adjtime () -T} Thread safety MT-Safe -.TE -.SH STANDARDS -None. -.SH HISTORY -4.3BSD, System V. -.SH NOTES -The adjustment that -.BR adjtime () -makes to the clock is carried out in such a manner that the clock -is always monotonically increasing. -Using -.BR adjtime () -to adjust the time prevents the problems that could be caused for certain -applications (e.g., -.BR make (1)) -by abrupt positive or negative jumps in the system time. -.P -.BR adjtime () -is intended to be used to make small adjustments to the system time. -Most systems impose a limit on the adjustment that can be specified in -.IR delta . -In the glibc implementation, -.I delta -must be less than or equal to (INT_MAX / 1000000 \- 2) -and greater than or equal to (INT_MIN / 1000000 + 2) -(respectively 2145 and \-2145 seconds on i386). -.SH BUGS -A longstanding bug -.\" http://sourceware.org/bugzilla/show_bug?id=2449 -.\" http://bugzilla.kernel.org/show_bug.cgi?id=6761 -meant that if -.I delta -was specified as NULL, -no valid information about the outstanding clock adjustment was returned in -.IR olddelta . -(In this circumstance, -.BR adjtime () -should return the outstanding clock adjustment, without changing it.) -This bug is fixed -.\" Thanks to the new adjtimex() ADJ_OFFSET_SS_READ flag -on systems with glibc 2.8 or later and -Linux kernel 2.6.26 or later. -.SH SEE ALSO -.BR adjtimex (2), -.BR gettimeofday (2), -.BR time (7) |