explain_flock_or_die(3) [debian man page]

explain_flock_or_die(3) 				     Library Functions Manual					   explain_flock_or_die(3)

NAME

       explain_flock_or_die - control advisory lock on open file and report errors

SYNOPSIS

       #include <libexplain/flock.h>
       void explain_flock_or_die(int fildes, int command);
       int explain_flock_on_error(int fildes, int command))

DESCRIPTION

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

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

       fildes  The fildes, exactly as to be passed to the flock(2) system call.

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

RETURN VALUE

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

       The explain_flock_on_error function always returns the value return by the wrapped flock(2) system call.

EXAMPLE

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

SEE ALSO

       flock(2)
	       apply or remove an advisory lock on an open file

       explain_flock(3)
	       explain flock(2) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 0.52
       Copyright (C) 2009 Peter Miller

															   explain_flock_or_die(3)

explain_system_or_die(3)				     Library Functions Manual					  explain_system_or_die(3)

NAME

       explain_system_or_die - execute a shell command and report errors

SYNOPSIS

       #include <libexplain/system.h>
       void explain_system_or_die(const char *command);
       void explain_system_success_or_die(const char *command);
       int explain_system_success(const char *command);

DESCRIPTION

       These functions may be used to execute commands via the system(3) function, and report the results.

   explain_system_or_die
       void explain_system_or_die(const char *command);

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

       This function is intended to be used in a fashion similar to the following example:
	      int status = explain_system_or_die(command);

       command The command, exactly as to be passed to the system(3) system call.

       Returns:
	       This function only returns on success, see system(3) for more information.  On failure, prints an explanation and exits.

   explain_system_success_or_die
       void explain_system_success_or_die(const char *command);

       The explain_system_success_or_die function is used to call the system(3) system call.  On failure, including any  exit  status  other  than
       EXIT_SUCCESS,  an  explanation  will  be  printed  to  stderr,  obtained from explain_system(3), and then the process terminates by calling
       exit(EXIT_FAILURE).

       This function is intended to be used in a fashion similar to the following example:
	      explain_system_success_or_die(command);

       command The command, exactly as to be passed to the system(3) system call.

       Returns:
	       This function only returns on success.  On failure, prints an explanation and exits.

   explain_system_success
       int explain_system_success(const char *command);

       The explain_system_success function is used to call the system(3) system call.  On failure, including any exit status other than  EXIT_SUC-
       CESS,  an explanation will be printed to stderr, obtained from explain_system(3).  However, the priniting of an error message does not also
       cause exit(2) to be called.

       This function is intended to be used in a fashion similar to the following example:
	      int status = explain_system_success(command);

       command The command, exactly as to be passed to the system(3) system call.

       Returns:
	       the value returned by the system(3) system call.  In all cases other than EXIT_SUCCESS,	an  error  message  will  also	have  been
	       printed to stderr.

SEE ALSO

       system(3)
	       execute a shell command

       explain_system(3)
	       explain system(3) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 0.52
       Copyright (C) 2008 Peter Miller

															  explain_system_or_die(3)