BSD 2.11 - man page for setquota (bsd section 2)

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SETQUOTA(2)									      SETQUOTA(2)

       setquota - enable/disable quotas on a file system

       setquota(special, file)
       char *special, *file;

       Disc  quotas  are  enabled  or disabled with the setquota call.	Special indicates a block
       special device on which a mounted file system exists.  If file is nonzero, it specifies	a
       file  in  that  file  system from which to take the quotas.  If file is 0, then quotas are
       disabled on the file system.  The quota file must exist; it is normally created	with  the
       quotacheck(8) program.

       Only the super-user may turn quotas on or off.

       quota(2), quotacheck(8), quotaon(8)

       A  0  return  value  indicates a successful call.  A value of -1 is returned when an error
       occurs and errno is set to indicate the reason for failure.

       Setquota will fail when one of the following occurs:

       [ENOTDIR]      A component of either path prefix is not a directory.

       [EINVAL]       Either pathname contains a character with the high-order bit set.

       [EINVAL]       The kernel has not been compiled with the QUOTA option.

       [ENAMETOOLONG] A component of either pathname  exceeded	255  characters,  or  the  entire
		      length of either path name exceeded 1023 characters.

       [ENODEV]       Special does not exist.

       [ENOENT]       File does not exist.

       [ELOOP]	      Too many symbolic links were encountered in translating either pathname.

       [EPERM]	      The caller is not the super-user.

       [ENOTBLK]      Special is not a block device.

       [ENXIO]	      The  major  device  number  of  special  is out of range (this indicates no
		      device driver exists for the associated hardware).

       [EROFS]	      File resides on a read-only file system.

       [EACCES]       Search permission is denied for a component of either path prefix.

       [EACCES]       File resides on a file system different from special.

       [EACCES]       File is not a plain file.

       [EIO]	      An I/O error occurred while reading from or writing to the file  containing
		      the quotas.

       [EFAULT]       Special or path points outside the process's allocated address space.

       The  error  codes  are in a state of disarray; too many errors appear to the caller as one

4.2 Berkeley Distribution		 August 26, 1985			      SETQUOTA(2)
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