Linux Certif

Toute la documentation sur la certification Linux LPI

adjtimex

éíñ

adjtimex - ÔÏÎËÁÑ ÎÁÓÔÒÏÊËÁ ÞÁÓÏ× × ÑÄÒÅ

ïâúïò

#include <sys/timex.h>

int adjtimex(struct timex *buf);

ïðéóáîéå

Linux ÉÓÐÏÌØÚÕÅÔ ÄÌÑ ÐÏÄÓÔÒÏÊËÉ ÞÁÓÏ× ÁÌÇÏÒÉÔÍ David L. Mills (ÓÍ. RFC 1305). óÉÓÔÅÍÎÙÊ ×ÙÚÏ× adjtimex ÞÉÔÁÅÔ É (ÎÅÏÂÑÚÁÔÅÌØÎÏ) ÕÓÔÁÎÁ×ÌÉ×ÁÅÔ ÐÁÒÁÍÅÔÒÙ ÐÏÄÓÔÒÏÊËÉ ÄÌÑ ÜÔÏÇÏ ÁÌÇÏÒÉÔÍÁ. ÷ ËÁÞÅÓÔ×Å ÁÒÇÕÍÅÎÔÁ ÉÓÐÏÌØÚÕÅÔÓÑ ÕËÁÚÁÔÅÌØ ÎÁ ÓÔÒÕËÔÕÒÕ timex , ÐÏ ÚÎÁÞÅÎÉÑÍ × ÐÏÌÑÈ ËÏÔÏÒÏÊ ÏÓÕÝÅÓÔ×ÑÅÔÓÑ ÏÂÎÏ×ÌÅÎÉÅ ÐÁÒÁÍÅÔÒÏ× ÑÄÒÁ É × ÜÔÏÊ ÖÅ ÓÔÒÕËÔÕÒÅ ÐÒÏÉÓÈÏÄÉÔ ×ÏÚ×ÒÁÔ ÔÅËÕÝÉÈ ÚÎÁÞÅÎÉÊ ÐÁÒÁÍÅÔÒÏ× ÑÄÒÁ. äÁÎÎÁÑ ÓÔÒÕËÔÕÒÁ ÏÐÉÓÁÎÁ ÔÁË:

struct timex {

    int modes;           /* ×ÙÂÏÒ ÒÅÖÉÍÁ */

    long offset;         /* ÓÍÅÝÅÎÉÅ ÐÏ ×ÒÅÍÅÎÉ (usec) */

    long freq;           /* ÞÁÓÔÏÔÁ ÓÍÅÝÅÎÉÑ (scaled ppm) */

    long maxerror;       /* ÍÁËÓÉÍÁÌØÎÁÑ ÏÛÉÂËÁ (usec) */

    long esterror;       /* ÏÖÉÄÁÅÍÁÑ ÏÛÉÂËÁ (usec) */

    int status;          /* ËÏÍÁÎÄÁ/ÓÏÓÔÏÑÎÉÅ ÄÌÑ ÞÁÓÏ× */

    long constant;       /* ×ÒÅÍÅÎÎÁÑ ËÏÎÓÔÁÎÔÁ pll */

    long precision;      /* ÔÏÞÎÏÓÔØ ÞÁÓÏ× (usec) (ÔÏÌØËÏ ÞÔÅÎÉÅ) */

    long tolerance;      /* clock frequency tolerance (ppm)

                            (read only) */

    struct timeval time; /* ÔÅËÕÝÅÅ ×ÒÅÍÑ (ÔÏÌØËÏ ÞÔÅÎÉÅ) */

    long tick;           /* usecs between clock ticks */

};

ðÏÌÅ modes ÏÐÒÅÄÅÌÑÅÔ ËÁËÉÅ ÐÁÒÁÍÅÔÒÙ, ÅÓÌÉ ÜÔÏ ÎÅÏÂÈÏÄÉÍÏ, ÕÓÔÁÎÁ×ÌÉ×ÁÀÔÓÑ. úÎÁÞÅÎÉÅ ÐÏÌÑ ÍÏÖÅÔ ÓÏÄÅÒÖÁÔØ ËÏÍÂÉÎÁÃÉÉ ÂÉÔÏ×ÙÈ ÍÁÓÏË, ÚÎÁÞÅÎÉÑ ËÏÔÏÒÙÈ ÓÌÅÄÕÀÝÉÅ:

#define ADJ_OFFSET            0x0001 /* ÓÍÅÝÅÎÉÅ ×ÒÅÍÅÎÉtime offset */

#define ADJ_FREQUENCY         0x0002 /* ÞÁÓÔÏÔÁ ÓÍÅÝÅÎÉÑ */

#define ADJ_MAXERROR          0x0004 /* ÍÁËÓÉÍÁÌØÎÁÑ ÏÛÉÂËÁ ×ÒÅÍÅÎÉ */

#define ADJ_ESTERROR          0x0008 /* ÏÖÉÄÁÅÍÁÑ ÏÛÉÂËÁ ×ÒÅÍÅÎÉ */

#define ADJ_STATUS            0x0010 /* ÓÏÓÔÏÑÎÉÅ ÞÁÓÏ× */

#define ADJ_TIMECONST         0x0020 /* ×ÒÅÍÅÎÎÁÑ ËÏÎÓÔÁÎÔÁ pll */

#define ADJ_TICK              0x4000 /* ÚÎÁÞÅÎÉÅ ÔÉËÁ */

#define ADJ_OFFSET_SINGLESHOT 0x8001 /* old-fashioned adjtime */

ïÂÙÞÎÙÅ ÐÏÌØÚÏ×ÁÔÅÌÉ ÍÏÇÕÔ ÐÉÓÁÔØ × mode. ÔÏÌØËÏ ÎÏÌØ. ôÏÌØËÏ ÓÕÐÅÒÐÏÌØÚÏ×ÁÔÅÌØ root ÍÏÖÅÔ ÕÓÔÁÎÁ×ÌÉ×ÁÔØ ÌÀÂÙÅ ÐÁÒÁÍÅÔÒÙ.

÷ïú÷òáýáåíïå úîáþåîéå

÷ ÓÌÕÞÁÅ ÕÓÐÅÈÁ, adjtimex ×ÏÚ×ÒÁÝÁÅÔ ÓÏÓÔÏÑÎÉÅ ÞÁÓÏ×:

#define TIME_OK   0 /* ÞÁÓÙ ÓÉÎÈÒÏÎÉÚÉÒÏ×ÁÎÙ */

#define TIME_INS  1 /* ×ÓÔÁ×ÌÅÎÏ ÓÅËÕÎÄÎÙÊ ÐÒÙÖÏË */

#define TIME_DEL  2 /* ÕÄẠ́ΠÓÅËÕÎÄÎÙÊ ÐÒÙÖÏË */

#define TIME_OOP  3 /* ×ÙÐÏÌÎÑÅÔÓÑ ÓÅËÕÎÄÎÙÊ ÐÒÙÖÏË */

#define TIME_WAIT 4 /* ÓÅËÕÎÄÎÙÊ ÐÒÙÖÏË ÏÓÕÝÅÓÔ×̣Π*/

#define TIME_BAD  5 /* ÞÁÓÙ ÎÅ ÓÉÎÈÒÏÎÉÚÉÒÏ×ÁÎÙ */

÷ ÓÌÕÞÁÅ ÎÅÕÄÁÞÉ, adjtimex ×ÏÚ×ÒÁÝÁÅÔ -1 É ÕÓÔÁÎÁ×ÌÉ×ÁÅÔ errno.

ïûéâëé

EFAULT

buf ÎÅ Ñ×ÌÑÅÔÓÑ ÕËÁÚÁÔÅÌÅÍ ÎÁ ÄÏÓÔÕÐÎÕÀ ÄÌÑ ÚÁÐÉÓÉ ÏÂÌÁÓÔØ ÐÁÍÑÔÉ.

EPERM

buf.mode ÎÅ ÎÏÌØ, Á ÐÏÌØÚÏ×ÁÔÅÌØ ÎÅ Ñ×ÌÑÅÔÓÑ ÓÕÐÅÒÐÏÌØÚÏ×ÁÔÅÌÅÍ.

EINVAL

ðÏÐÙÔËÁ ÕÓÔÁÎÏ×ÉÔØ buf.offset × ÚÎÁÞÅÎÉÅ, ×ÙÈÏÄÑÝÅÅ ÚÁ ÄÉÁÐÁÚÏÎ ÏÔ -131071 ÄÏ +131071, ÉÌÉ ÕÓÔÁÎÏ×ÉÔØ buf.status × ÚÎÁÞÅÎÉÅ ÏÔÌÉÞÎÏÅ ÏÔ ÐÅÒÅÞÉÓÌÅÎÎÙÈ ×ÙÛÅ, ÉÌÉ ÕÓÔÁÎÏ×ÉÔØ buf.tick × ÚÎÁÞÅÎÉÅ ÚÁ ÐÒÅÄÅÌÁÍÉ ÄÉÁÐÁÚÏÎÁ ÏÔ 900000/HZ ÄÏ 1100000/HZ, ÇÄÅ HZ - ÜÔÏ ÞÁÓÔÏÔÁ ÐÒÅÒÙ×ÁÎÉÊ ÓÉÓÔÅÍÎÏÇÏ ÔÁÊÍÅÒÁ.

óï÷íåóôéíïóôø óï óôáîäáòôáíé

adjtimex - ÜÔÏ ÓÐÅÃÉÆÉÞÎÙÊ ÄÌÑ Linux ×ÙÚÏ× É ÏÎ ÎÅ ÄÏÌÖÅÎ ÉÓÐÏÌØÚÏ×ÁÔØÓÑ × ÐÒÏÇÒÁÍÍÁÈ, ËÏÔÏÒÙÅ ÐÉÛÕÔØÓÑ ËÁË ÐÅÒÅÎÏÓÉÍÙÅ. óÕÝÅÓÔ×ÕÅÔ ÐÏÈÏÖÉÊ, ÎÏ ÂÏÌÅÅ ÏÂÝÉÊ ÄÌÑ ÒÁÚÎÙÈ Unix ÓÉÓÔÅÍ ×ÙÚÏ× adjtime × SVr4.

óíïôòé ôáëöå

settimeofday(2)

ðåòå÷ïä

ðÅÒÅ×£Ì Ó ÁÎÇÌÉÊÓËÏÇÏ ÷ÉËÔÏÒ ÷ÉÓÌÏÂÏËÏ× <corochoone@perm.ru> 2003