NAME

       explain_shmctl_or_die - shared memory control and report errors

SYNOPSIS

       #include <libexplain/shmctl.h>
       void explain_shmctl_or_die(int shmid, int command, struct shmid_ds *data);
       int explain_shmctl_on_error(int shmid, int command, struct shmid_ds *data);

DESCRIPTION

       The  explain_shmctl_or_die  function is used to call the shmctl(2) system call. On failure an explanation
       will be printed to stderr, obtained from the explain_shmctl(3) function, and then the process  terminates
       by calling exit(EXIT_FAILURE).

       The explain_shmctl_on_error function is used to call the shmctl(2) system call. On failure an explanation
       will be printed to stderr, obtained from the explain_shmctl(3) function, but still returns to the caller.

       shmid   The shmid, exactly as to be passed to the shmctl(2) system call.

       command The command, exactly as to be passed to the shmctl(2) system call.

       data    The data, exactly as to be passed to the shmctl(2) system call.

RETURN VALUE

       The  explain_shmctl_or_die  function  only  returns  on  success,  see shmctl(2) for more information. On
       failure, prints an explanation and exits, it does not return.

       The explain_shmctl_on_error function always returns the value return  by  the  wrapped  shmctl(2)  system
       call.

EXAMPLE

       The explain_shmctl_or_die function is intended to be used in a fashion similar to the following example:
              explain_shmctl_or_die(shmid, command, data);

SEE ALSO

       shmctl(2)
               shared memory control

       explain_shmctl(3)
               explain shmctl(2) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 1.4
       Copyright (C) 2011 Peter Miller

                                                                                        explain_shmctl_or_die(3)