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getsysinfo(2)							 getsysinfo(2)

Name
       getsysinfo - get	system information

Syntax
       #include	<sys/types.h>
       #include	<sys/sysinfo.h>

       getsysinfo(op, buffer, nbytes, start, arg)
       unsigned	 op;
       char	 *buffer;
       unsigned	  nbytes;
       int	 *start;
       char	  *arg;

Description
       The system call retrieves information from the system.

       The op argument specifies the operation to be performed.	 Values	for op
       are defined in the <sys/sysinfo.h> header file.

       Possible	op values are as follows:

       GSI_BOOTDEV
	  Return the BOOTDEV string, which is used for the installation.

       GSI_NETBLK
	  Return the entire NETBLK structure, which is used  for  the  network
	  installation.

       GSI_PROG_ENV
	  Return  the  compatibility mode of the process.  Possible values are
	  A_BSD, A_POSIX, A_SYSTEM_FIVE	as defined in <sys/exec.h>.

       GSI_MAX_UPROCS
	  Return the maximum number of processes allowed per user id.

       GSI_TTYP
	  Return the major and minor numbers of	the controlling	terminal.

       GSI_UACSYS (RISC	only)
	  Return current value of flag that determines whether or not to print
	  "unaligned access fixup" message on a	system-wide basis.

       GSI_UACPARNT (RISC only)
	  Return  current  value  of  flag  in	parent process's structure for
	  printing unaligned access messages.

       GSI_UACPROC (RISC only)
	  Return current value of flag in process's structure for printing  of
	  unaligned access messages.

       GSI_MMAP_ALIGNMENT (RISC	only)
	  Return  the minimum alignment	required for an	address	specified with
	  the option in	the system call.

       The nbytes argument defines the size of buffer into  which  the	system
       information is returned.

       The  start argument is the current logical location within the internal
       system table referenced by the op, and it must be initially set to  The
       start  argument	is  updated  to	 reflect  the current logical location
       within the system table,	allowing successive executions of to  retrieve
       information about all the system	structures specified by	op.

       The start argument is set to 0 when all system information requested by
       op has been retrieved.

       The optional arg	argument may be	used by	certain	 op's  for  additional
       information.  When arg is not required, it should be set	to NULL.

       When  information  about	 multiple system structures is returned, it is
       stored within consecutive buffer	locations.  The	information  for  each
       system structure	is dependent upon op.

Return Values
       Upon  successful	completion, a value indicating the number of requested
       items stored in buffer is returned.  If the information requested by op
       is  not	available,  getsysinfo	returns	 a  zero.   Otherwise,	-1  is
       returned, and the global	variable, is set to indicate the error.

Diagnostics
       [EFAULT]	      Either buffer, start, or arg causes an  illegal  address
		      to be referenced.

       [EINVAL]	      The op argument is invalid.

       [EPERM]	      Permission is denied for the operation requested

See Also
       setsysinfo(2)

								 getsysinfo(2)

Name | Syntax | Description | Return Values | Diagnostics | See Also

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