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This page displays the COHERENT manpage for ulimit() [Get/set limits for a process].
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ulimit() -- System Call (libc) Get/set limits for a process #include <ulimit.h> long ulimit (command [, blocks^]) int command, blocks^; The system call ulimit() retrieves or sets limits on what a process can do. command indicates what you want it to do, as follows: UL_GETFSIZE Return the maximum size, in blocks, of a file that the current process can create. UL_SETFSIZE Limit to blocks the size of any regular file that any process can create. A process may decrease this limit, but only a process owned by the superuser root can increase it. UL_GMEMLIM Return the current process's break value. For details on the break value, see the Lexicon entry for brk(). UL_GDESLIM Return the maximum number of files that this process can open. Each of the above commands is defined in the header file ulimit.h. When called to execute the command UL_SETFSIZE, ulimit() requires a second integer argument; when called to execute any other command, ulimit() takes only one argument. If all goes well, ulimit() returns a non-negative value. ulimit() fails if any of the following occur: -> A process owned by someone other than the superuser root attempted to increase its file-size limit. ulimit() returns -1 and sets errno to EPERM. -> The first argument to ulimit() was something other than one of the above-named values. ulimit() returns -1 and sets errno to EINVAL. See Also brk(), libc, ulimit.h Notes ulimit() does not fail per se if you invoke it with option UL_SETFSIZE and do not supply a second argument. However, doing so will (or should) crash the process. Caveat utilitor.