개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(1M)을 검색하려면 섹션에서 1M 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

sem_unlink(3c)

Standard C Library Functions                                    sem_unlink(3C)



NAME
       sem_unlink - remove a named semaphore

SYNOPSIS
       #include <semaphore.h>

       int sem_unlink(const char *name);

DESCRIPTION
       The  sem_unlink()  function  removes  the semaphore named by the string
       name. If the semaphore named by name is currently referenced  by  other
       processes,  then  sem_unlink()  has no effect on the state of the sema‐
       phore.  If  one  or  more  processes  have  the  semaphore  open   when
       sem_unlink() is called, destruction of the semaphore is postponed until
       all references to  the  semaphore  have  been  destroyed  by  calls  to
       sem_close(3C),  _Exit(2),  or one of the exec functions (see exec(2)) .
       Calls to sem_open(3C) to re-create or re-connect to the semaphore refer
       to  a new semaphore after sem_unlink() is called. The sem_unlink() call
       does not block until all references have  been  destroyed;  it  returns
       immediately.

RETURN VALUES
       Upon successful completion, sem_unlink() returns 0. Otherwise, the sem‐
       aphore is not changed and the function returns a value of −1  and  sets
       errno to indicate the error.

ERRORS
       The sem_unlink() function will fail if:

       EACCES          Permission is denied to unlink the named semaphore.


       ENAMETOOLONG    The  length of name string exceeds PATH_MAX, or a path‐
                       name  component   is   longer   than   NAME_MAX   while
                       _POSIX_NO_TRUNC is in effect.


       ENOENT          The named semaphore does not exist.


       ENOSYS          The  sem_unlink() function is not supported by the sys‐
                       tem.


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE  TYPEAT‐
       TRIBUTE  VALUE _ Interface StabilityCommitted _ MT-LevelMT-Safe _ Stan‐
       dardSee standards(7).


SEE ALSO
       exec(2), exit(2),  sem_close(3C),  sem_open(3C),  attributes(7),  stan‐
       dards(7)



Oracle Solaris 11.4               31 Jan 2012                   sem_unlink(3C)