Advanced Programming in the UNIX® Environment

ptg10805159

848 Function Prototypes Appendix A

int clock_gettime(clockid_tclock_id,struct timespec *tsp);

<sys/time.h> p. 189

clock_id:CLOCK_REALTIME, CLOCK_MONOTONIC,

CLOCK_PROCESS_CPUTIME_ID,

CLOCK_THREAD_CPUTIME_ID

Returns: 0 if OK,−1 on error

int clock_nanosleep(clockid_tclock_id,intflags,

const struct timespec *reqtp,

struct timespec *remtp);

<time.h> p. 375

clock_id:CLOCK_REALTIME, CLOCK_MONOTONIC,

CLOCK_PROCESS_CPUTIME_ID,

CLOCK_THREAD_CPUTIME_ID

flags:TIMER_ABSTIME

Returns: 0 if slept for requested time, error number on failure

int clock_settime(clockid_tclock_id,const struct timespec *tsp);

<sys/time.h> p. 190

clock_id:CLOCK_REALTIME, CLOCK_MONOTONIC,

CLOCK_PROCESS_CPUTIME_ID,

CLOCK_THREAD_CPUTIME_ID

Returns: 0 if OK,−1 on error

int close(intfd);

<unistd.h> p. 66

Returns: 0 if OK,−1 on error

int closedir(DIR *dp);

<dirent.h> p. 130

Returns: 0 if OK,−1 on error

void closelog(void);

<syslog.h> p. 470

unsigned

char *CMSG_DATA(struct cmsghdr *cp);

<sys/socket.h> p. 645

Returns: pointer to data associated withcmsghdrstructure

struct

cmsghdr *CMSG_FIRSTHDR(struct msghdr *mp);

<sys/socket.h> p. 645

Returns: pointer to firstcmsghdrstructureassociated with

themsghdrstructure, orNULLif none exists