• 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  Warning: This routine is obsolete.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 non-negative value. On error, -1 is returned, and errno is set appropriately.
• ERRORS
  

  EPERM

  A non-root 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 3.19 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/.

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