NAME

       ulimit - get and set user limits

SYNOPSIS

       #include <ulimit.h>

       long ulimit(int cmd, long newlimit);

DESCRIPTION

       Warning:  This  routine  is  obsolete.   Use getrlimit(2), setrlimit(2), and sysconf(3) instead.  For the
       shell command ulimit(), see bash(1).

       The ulimit() call will get or set some limit for the calling process.  The cmd argument can have  one  of
       the following values.

       UL_GETFSIZE
              Return the limit on the size of a file, in units of 512 bytes.

       UL_SETFSIZE
              Set the limit on the size of a file.

       3      (Not implemented for Linux.)  Return the maximum possible address of the data segment.

       4      (Implemented  but  no  symbolic  constant  provided.)  Return the maximum number of files that the
              calling process can open.

RETURN VALUE

       On success, ulimit() returns  a  nonnegative  value.   On  error,  -1  is  returned,  and  errno  is  set
       appropriately.

ERRORS

       EPERM  A unprivileged process tried to increase a limit.

CONFORMING TO

       SVr4, POSIX.1-2001.  POSIX.1-2008 marks ulimit() as obsolete.

SEE ALSO

       bash(1), getrlimit(2), setrlimit(2), sysconf(3)

COLOPHON

       This  page  is  part  of  release 3.54 of the Linux man-pages project.  A description of the project, and
       information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.