Advanced Programming in the UNIX® Environment

ptg10805159

Appendix A Function Prototypes 879

int renameat(intoldfd,const char *oldname,intnewfd,

const char *newname);

<stdio.h> p. 119

Returns: 0 if OK,−1 on error

void rewind(FILE *fp);

<stdio.h> p. 158

void rewinddir(DIR *dp);

<dirent.h> p. 130

int rmdir(const char *path);

<unistd.h> p. 130

Returns: 0 if OK,−1 on error

int scanf(const char *restrictformat,...);

<stdio.h> p. 162

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

end of file beforeany conversion

void seekdir(DIR *dp,long loc);

<dirent.h> p. 130

int select(intmaxfdp1,fd_set *restrictreadfds,

fd_set *restrictwritefds,fd_set *restrictexceptfds,

struct timeval *restricttvptr);

<sys/select.h> p. 502

Returns: count of ready descriptors, 0 on timeout,−1 on error

int sem_close(sem_t *sem);

<semaphore.h> p. 580

Returns: 0 if OK,−1 on error

int semctl(intsemid,intsemnum,intcmd,...

/* union semunarg*/ );

<sys/sem.h> p. 567

cmd:IPC_STAT, IPC_SET, IPC_RMID, GETPID,

GETNCNT, GETZCNT, GETVAL, SETVAL,

GETALL, SETALL

Returns: (depends on command),−1 on error

int sem_destroy(sem_t *sem);

<semaphore.h> p. 582

Returns: 0 if OK,−1 on error