ulimit(3)                  Library Functions Manual                  ulimit(3)

NAME
       ulimit - get and set user limits

LIBRARY
       Standard C library (libc, -lc)

SYNOPSIS
       #include <ulimit.h>

       [[deprecated]] long ulimit(int cmd, long newlimit);

DESCRIPTION
       Warning: this routine is obsolete.  Use getrlimit(2), setrlimit(2), and
       sysconf(3) instead.  For the shell command ulimit, see bash(1).

       The ulimit() call will get or set some limit for the calling process.
       The cmd argument can have one of the following values.

       UL_GETFSIZE
              Return the limit on the size of a file, in units of 512 bytes.

       UL_SETFSIZE
              Set the limit on the size of a file.

       3      (Not implemented for Linux.)  Return the maximum possible
              address of the data segment.

       4      (Implemented but no symbolic constant provided.)  Return the
              maximum number of files that the calling process can open.

RETURN VALUE
       On success, ulimit() returns a nonnegative value.  On error, -1 is
       returned, and errno is set to indicate the error.

ERRORS
       EPERM  An unprivileged process tried to increase a limit.

ATTRIBUTES
       For an explanation of the terms used in this section, see
       attributes(7).

       +--------------------------------------------+---------------+---------+
       |Interface                                   | Attribute     | Value   |
       +--------------------------------------------+---------------+---------+
       |ulimit ()                                   | Thread safety | MT-Safe |
       +--------------------------------------------+---------------+---------+
STANDARDS
       POSIX.1-2008.

HISTORY
       SVr4, POSIX.1-2001.  POSIX.1-2008 marks it as obsolete.

SEE ALSO
       bash(1), getrlimit(2), setrlimit(2), sysconf(3)

Linux man-pages 6.7               2023-10-31                         ulimit(3)