ulimit(2)
NAME
ulimit − get and set user limits
SYNOPSIS
#include <ulimit.h>
long ulimit(int cmd, ...);
DESCRIPTION
ulimit() provides for control over process limits. Available values for cmd are:
UL_GETFSIZE Get the file size limit of the process. The limit is in units of 512-byte blocks and is inherited by child processes. Files of any size can be read. The optional second argument is not used.
UL_SETFSIZE Set the file size limit of the process to the value of the optional second argument which is taken as a long. Any process can decrease this limit, but only a process with an effective user ID of super-user can increase the limit. Note that the limit must be specified in units of 512-byte blocks.
UL_GETMAXBRK Get the maximum possible break value (see brk(2)). Depending on system resources such as swap space, this maximum might not be attainable at a given time. The optional second argument is not used.
ERRORS
ulimit() fails if one or more of the following conditions is true.
[EINVAL] cmd is not in the correct range.
[EPERM] ulimit() fails and the limit is unchanged if a process with an effective user ID other than super-user attempts to increase its file size limit.
RETURN VALUE
Upon successful completion, a non-negative value is returned. Errors return a −1, with errno set to indicate the error.
SEE ALSO
STANDARDS CONFORMANCE
ulimit(): AES, SVID2, XPG2, XPG3, XPG4
Hewlett-Packard Company — HP-UX Release 9.0: August 1992