Advanced Programming in the UNIX® Environment

ptg10805159

Appendix A Function Prototypes 865

ssize_t msgrcv(intmsqid,void *ptr,size_tnbytes,long type,intflag);

<sys/msg.h> p. 564

flag:IPC_NOWAIT, MSG_NOERROR

Returns: size of data portion of message if OK,−1 on error

int msgsnd(intmsqid,const void *ptr,size_tnbytes,intflag);

<sys/msg.h> p. 563

flag:IPC_NOWAIT

Returns: 0 if OK,−1 on error

int msync(void *addr,size_tlen,intflags);

<sys/mman.h> p. 528

flag:MS_ASYNC, MS_INVALIDATE, MS_SYNC

Returns: 0 if OK,−1 on error

int munmap(void *addr,size_tlen);

<sys/mman.h> p. 528

Returns: 0 if OK,−1 on error

int nanosleep(const struct timespec *reqtp,

struct timespec *remtp);

<time.h> p. 374

Returns: 0 if slept for requested time,−1 on error

int nice(intincr);

<unistd.h> p. 276

Returns: new nice value−NZEROif OK,−1 on error

uint32_t ntohl(uint32_tnetint32);

<arpa/inet.h> p. 594

Returns: 32-bit integer in host byte order

uint16_t ntohs(uint16_tnetint16);

<arpa/inet.h> p. 594

Returns: 16-bit integer in host byte order

int open(const char *path,intoflag,... /* mode_tmode*/ );

<fcntl.h> p. 62

oflag:O_RDONLY, O_WRONLY, O_RDWR, O_EXEC,

O_SEARCH;

O_APPEND, O_CLOEXEC, O_CREAT,

O_DIRECTORY, O_DSYNC, O_EXCL,

O_NOCTTY, O_NOFOLLOW, O_NONBLOCK,

O_RSYNC, O_SYNC, O_TRUNC, O_TTY_INIT

mode:S_IS[UG]ID, S_ISVTX,

S_I[RWX](USR|GRP|OTH)

Returns: file descriptor if OK,−1 on error

Platforms:O_FSYNCflag on FreeBSD 8.0 and Mac OS X 10.6.8