Advanced Programming in the UNIX® Environment

ptg10805159

886 Function Prototypes Appendix A

int sigsuspend(const sigset_t *sigmask);

<signal.h> p. 359

Returns:−1witherrnoset toEINTR

int sigwait(const sigset_t *restrictset,int *restrictsignop);

<signal.h> p. 454

Returns: 0 if OK, error number on failure

unsigned

int sleep(unsigned intseconds);

<unistd.h> p. 373

Returns: 0 or number of unslept seconds

int snprintf(char *restrictbuf,size_tn,

const char *restrictformat,...);

<stdio.h> p. 159

Returns: number of characters that would have been stored

in array if buffer was large enough, negative value

if encoding error

int sockatmark(intsockfd);

<sys/socket.h> p. 626

Returns: 1 if at mark, 0 if not at mark,−1 on error

int socket(intdomain,inttype,intprotocol);

<sys/socket.h> p. 590

type:SOCK_STREAM, SOCK_DGRAM, SOCK_SEQPACKET

Returns: file (socket) descriptor if OK,−1 on error

int socketpair(intdomain,inttype,intprotocol,intsockfd[2]);

<sys/socket.h> p. 630

type:SOCK_STREAM, SOCK_DGRAM, SOCK_SEQPACKET

Returns: 0 if OK,−1 on error

int sprintf(char *restrictbuf,const char *restrictformat,...);

<stdio.h> p. 159

Returns: number of characters stored in array if OK, negative

value if encoding error

int sscanf(const char *restrictbuf,

const char *restrictformat,...);

<stdio.h> p. 162

Returns: number of input items assigned,EOFif input error or

end of file beforeany conversion