ulimit(3) Library Functions Manual ulimit(3)
Name
ulimit - get and set user limits
Syntax
long ulimit (cmd, newlimit)
int cmd;
long newlimit;
Description
This function provides control over process limits. An explanation of the cmd values follow.
Value Explanation
1 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.
2 Set the process's file size limit to the value of newlimit. Any process can decrease this limit, but only a process with an effec-
tive user ID of superuser can increase the limit. The system call fails and the limit remains unchanged, if a process with an
effective user ID other than superuser attempts to increase its file size limit.
3 Get the maximum possible break value. For further information, see
Return Values
Upon successful completion, a nonnegative value is returned. Otherwise, a value of -1 is returned, and errno is set to indicate the error.
Diagnostics
[EINVAL] Bad value for cmd.
[EPERM] The effective user ID of the calling process is not superuser.
See Also
brk(2), write(2)
ulimit(3)
