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Linux 2.6 - man page for ulimit (linux section 3)

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ULIMIT(3)			    Linux Programmer's Manual				ULIMIT(3)

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       Warning:  This  routine	is  obsolete.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 seg-
	      ment.

       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 3.55 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/.

Linux					    2008-08-06					ULIMIT(3)
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