IPCRM(1)                   POSIX Programmer's Manual                  IPCRM(1)



PPRROOLLOOGG
       This manual page is part of the POSIX Programmer's Manual.  The OS
       implementation of this interface may differ (consult the corresponding
       OS manual page for details of OS behavior), or the interface may not be
       implemented on OS.

NNAAMMEE
       ipcrm -- remove an XSI message queue, semaphore set, or shared memory
       segment identifier

SSYYNNOOPPSSIISS
       ipcrm [[-q msgid|-Q msgkey|-s semid|-S semkey|-m shmid|-M shmkey]]...

DDEESSCCRRIIPPTTIIOONN
       The _i_p_c_r_m utility shall remove zero or more message queues, semaphore
       sets, or shared memory segments. The interprocess communication
       facilities to be removed are specified by the options.

       Only a user with appropriate privileges shall be allowed to remove an
       interprocess communication facility that was not created by or owned by
       the user invoking _i_p_c_r_m.

OOPPTTIIOONNSS
       The _i_p_c_r_m utility shall conform to the Base Definitions volume of
       POSIX.1-2017, _S_e_c_t_i_o_n _1_2_._2, _U_t_i_l_i_t_y _S_y_n_t_a_x _G_u_i_d_e_l_i_n_e_s.

       The following options shall be supported:

       --qq _m_s_g_i_d  Remove the message queue identifier _m_s_g_i_d from the system and
                 destroy the message queue and data structure associated with
                 it.

       --mm _s_h_m_i_d  Remove the shared memory identifier _s_h_m_i_d from the system.
                 The shared memory segment and data structure associated with
                 it shall be destroyed after the last detach.

       --ss _s_e_m_i_d  Remove the semaphore identifier _s_e_m_i_d from the system and
                 destroy the set of semaphores and data structure associated
                 with it.

       --QQ _m_s_g_k_e_y Remove the message queue identifier, created with key _m_s_g_k_e_y,
                 from the system and destroy the message queue and data
                 structure associated with it.

       --MM _s_h_m_k_e_y Remove the shared memory identifier, created with key _s_h_m_k_e_y,
                 from the system. The shared memory segment and data structure
                 associated with it shall be destroyed after the last detach.

       --SS _s_e_m_k_e_y Remove the semaphore identifier, created with key _s_e_m_k_e_y,
                 from the system and destroy the set of semaphores and data
                 structure associated with it.

OOPPEERRAANNDDSS
       None.

SSTTDDIINN
       Not used.

IINNPPUUTT FFIILLEESS
       None.

EENNVVIIRROONNMMEENNTT VVAARRIIAABBLLEESS
       The following environment variables shall affect the execution of
       _i_p_c_r_m:

       _L_A_N_G      Provide a default value for the internationalization
                 variables that are unset or null. (See the Base Definitions
                 volume of POSIX.1-2017, _S_e_c_t_i_o_n _8_._2, _I_n_t_e_r_n_a_t_i_o_n_a_l_i_z_a_t_i_o_n
                 _V_a_r_i_a_b_l_e_s for the precedence of internationalization
                 variables used to determine the values of locale categories.)

       _L_C___A_L_L    If set to a non-empty string value, override the values of
                 all the other internationalization variables.

       _L_C___C_T_Y_P_E  Determine the locale for the interpretation of sequences of
                 bytes of text data as characters (for example, single-byte as
                 opposed to multi-byte characters in arguments).

       _L_C___M_E_S_S_A_G_E_S
                 Determine the locale that should be used to affect the format
                 and contents of diagnostic messages written to standard
                 error.

       _N_L_S_P_A_T_H   Determine the location of message catalogs for the processing
                 of _L_C___M_E_S_S_A_G_E_S.

AASSYYNNCCHHRROONNOOUUSS EEVVEENNTTSS
       Default.

SSTTDDOOUUTT
       Not used.

SSTTDDEERRRR
       The standard error shall be used only for diagnostic messages.

OOUUTTPPUUTT FFIILLEESS
       None.

EEXXTTEENNDDEEDD DDEESSCCRRIIPPTTIIOONN
       None.

EEXXIITT SSTTAATTUUSS
       The following exit values shall be returned:

        0    Successful completion.

       >0    An error occurred.

CCOONNSSEEQQUUEENNCCEESS OOFF EERRRROORRSS
       Default.

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       None.

EEXXAAMMPPLLEESS
       None.

RRAATTIIOONNAALLEE
       None.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _i_p_c_s

       The Base Definitions volume of POSIX.1-2017, _C_h_a_p_t_e_r _8, _E_n_v_i_r_o_n_m_e_n_t
       _V_a_r_i_a_b_l_e_s, _S_e_c_t_i_o_n _1_2_._2, _U_t_i_l_i_t_y _S_y_n_t_a_x _G_u_i_d_e_l_i_n_e_s

       The System Interfaces volume of POSIX.1-2017, _m_s_g_c_t_l(), _s_e_m_c_t_l(),
       _s_h_m_c_t_l()

CCOOPPYYRRIIGGHHTT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1-2017, Standard for Information Technology --
       Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  In the event of any discrepancy between this version and the
       original IEEE and The Open Group Standard, the original IEEE and The
       Open Group Standard is the referee document. The original Standard can
       be obtained online at http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .



IEEE/The Open Group                  2017                             IPCRM(1)
