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Warning: This routine is obsolete.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 3.23 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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