ulimit(2)
NAME
ulimit − get and set user limits
SYNTAX
long ulimit (cmd, newlimit)
int cmd;
long newlimit;
DESCRIPTION
This function provides for control over process limits. The cmd values available are:
Get the process’s file size limit. The limit is in units of 512-byte blocks and is inherited by child processes. Files of any size can be read.
Set the process’s file size limit to the value of newlimit. Any process may decrease this limit, but only a process with an effective user ID of superuser may increase the limit. The ulimit system call will fail and the limit will be unchanged if a process with an effective user ID other than superuser attempts to increase its file size limit.
Get the maximum possible break value. For further information, see brk(.).
RETURN VALUE
Upon successful completion, a nonnegative value is returned. Otherwise, a value of −1 is returned and errno is set to indicate the error.