Advanced Programming in the UNIX® Environment

ptg10805159

858 Function Prototypes Appendix A

int getnameinfo(const struct sockaddr *restrictaddr,

socklen_talen,char *restricthost,

socklen_thostlen,char *restrictservice,

socklen_tservlen,unsigned intflags);

<sys/socket.h> p. 600

<netdb.h>

flags:NI_DGRAM, NI_NAMEREQD, NI_NOFQDN,

NI_NUMERICHOST, NI_NUMERICSCOPE,

NI_NUMERICSERV

Returns: 0 if OK, nonzero on error

struct

netent *getnetbyaddr(uint32_tnet,inttype);

<netdb.h> p. 598

Returns: pointer if OK,NULLon error

struct

netent *getnetbyname(const char *name);

<netdb.h> p. 598

Returns: pointer if OK,NULLon error

struct

netent *getnetent(void);

<netdb.h> p. 598

Returns: pointer if OK,NULLon error

int getopt(intargc,char * constargv[], const char *options);

<fcntl.h> p. 662

extern int opterr, optind, optopt;

extern char *optarg;

Returns: the next option character,or−1when all options

have been processed

int getpeername(intsockfd,struct sockaddr *restrictaddr,

socklen_t *restrictalenp);

<sys/socket.h> p. 605

Returns: 0 if OK,−1 on error

pid_t getpgid(pid_tpid);

<unistd.h> p. 294

Returns: process group ID if OK,−1 on error

pid_t getpgrp(void);

<unistd.h> p. 293

Returns: process group ID of calling process