ULIMIT(2)

NAME

ulimit − get and set user limits

SYNOPSIS

long ulimit (cmd, newlimit)
int cmd;
long newlimit;

HP-UX COMPATIBILITY

Level: HP-UX/RUN ONLY

Origin: System V

DESCRIPTION

This function provides for control over process limits. The cmd values available are:

1 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.

2 Set the file size limit of the process to the value of newlimit. Any process may decrease this limit, but only a process with an effective user ID of super-user may increase the limit. Note that the limit must be specified in units of 512-byte blocks.

3 Get the maximum possible break value. See brk(2). Ulimit will fail if one or more of the following conditions is true.

[EINVAL] cmd is not in the correct range.

[EPERM] Ulimit will fail and the limit will be 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 appropriately.

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