SYNOPSIS<\/a>
DESCRIPTION<\/a>
RETURN VALUE<\/a>
ERRORS<\/a>
ATTRIBUTES<\/a>
CONFORMING TO<\/a>
NOTES<\/a>
BUGS<\/a>
SEE ALSO<\/a>
COLOPHON<\/a> <\/p>\n
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NAME <\/a> <\/h2>\nadjtime \u2212 correct the time to synchronize the system clock<\/p>\n
SYNOPSIS <\/a> <\/h2>\n#include <\/b><\/p>\nint adjtime(const struct timeval *<\/b>delta<\/i>, struct timeval *<\/b>olddelta<\/i>);<\/b><\/p>\n
Feature Test Macro Requirements for glibc (see feature_test_macros<\/b>(7)):<\/p>\n
adjtime<\/b>():
Since glibc 2.19:
_DEFAULT_SOURCE
Glibc 2.19 and earlier:
_BSD_SOURCE<\/p>\nDESCRIPTION <\/a> <\/h2>\nThe adjtime<\/b>() function gradually adjusts the system clock (as returned by gettimeofday<\/b>(2)). The amount of time by which the clock is to be adjusted is specified in the structure pointed to by delta<\/i>. This structure has the following form:<\/p>\n
struct timeval {
time_t tv_sec; \/bin \/boot \/dead.letter \/dev \/etc \/home \/initrd \/lib \/lib64 \/lost+found \/media \/mnt \/opt \/proc \/release-notes.html \/release-notes.txt \/root \/run \/sbin \/srv \/sys \/tmp \/usr \/var seconds bodies\/ usr\/
suseconds_t tv_usec; \/bin \/boot \/dead.letter \/dev \/etc \/home \/initrd \/lib \/lib64 \/lost+found \/media \/mnt \/opt \/proc \/release-notes.html \/release-notes.txt \/root \/run \/sbin \/srv \/sys \/tmp \/usr \/var microseconds bodies\/ usr\/
};<\/p>\n
If the adjustment in delta<\/i> 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 delta<\/i> is negative, then the clock is slowed down in a similar fashion.<\/p>\n
If a clock adjustment from an earlier adjtime<\/b>() call is already in progress at the time of a later adjtime<\/b>() call, and delta<\/i> 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>\n
If olddelta<\/i> 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.<\/p>\nRETURN VALUE <\/a> <\/h2>\nOn success, adjtime<\/b>() returns 0. On failure, \u22121 is returned, and errno<\/i> is set to indicate the error.<\/p>\nERRORS <\/a> <\/h2>\n
#include int adjtime(const struct timeval *<\/b>delta<\/i>, struct timeval *<\/b>olddelta<\/i>);<\/b><\/p>\n Feature Test Macro Requirements for glibc (see feature_test_macros<\/b>(7)):<\/p>\n adjtime<\/b>(): The adjtime<\/b>() function gradually adjusts the system clock (as returned by gettimeofday<\/b>(2)). The amount of time by which the clock is to be adjusted is specified in the structure pointed to by delta<\/i>. This structure has the following form:<\/p>\n struct timeval { If the adjustment in delta<\/i> 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 delta<\/i> is negative, then the clock is slowed down in a similar fashion.<\/p>\n If a clock adjustment from an earlier adjtime<\/b>() call is already in progress at the time of a later adjtime<\/b>() call, and delta<\/i> 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>\n If olddelta<\/i> 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.<\/p>\n On success, adjtime<\/b>() returns 0. On failure, \u22121 is returned, and errno<\/i> is set to indicate the error.<\/p>\n
Since glibc 2.19:
_DEFAULT_SOURCE
Glibc 2.19 and earlier:
_BSD_SOURCE<\/p>\nDESCRIPTION <\/a> <\/h2>\n
time_t tv_sec; \/bin \/boot \/dead.letter \/dev \/etc \/home \/initrd \/lib \/lib64 \/lost+found \/media \/mnt \/opt \/proc \/release-notes.html \/release-notes.txt \/root \/run \/sbin \/srv \/sys \/tmp \/usr \/var seconds bodies\/ usr\/
suseconds_t tv_usec; \/bin \/boot \/dead.letter \/dev \/etc \/home \/initrd \/lib \/lib64 \/lost+found \/media \/mnt \/opt \/proc \/release-notes.html \/release-notes.txt \/root \/run \/sbin \/srv \/sys \/tmp \/usr \/var microseconds bodies\/ usr\/
};<\/p>\nRETURN VALUE <\/a> <\/h2>\n
ERRORS <\/a> <\/h2>\n
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