ulimit(3)

1ULIMIT(3)                  Linux Programmer's Manual                 ULIMIT(3)
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NAME

6       ulimit - get and set user limits
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SYNOPSIS

9       #include <ulimit.h>
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11       long ulimit(int cmd, long newlimit);
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DESCRIPTION

14       Warning: This routine is obsolete.  Use getrlimit(2), setrlimit(2), and
15       sysconf(3) instead.  For the shell command ulimit(), see bash(1).
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17       The ulimit() call will get or set some limit for the  calling  process.
18       The cmd argument can have one of the following values.
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20       UL_GETFSIZE
21              Return the limit on the size of a file, in units of 512 bytes.
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23       UL_SETFSIZE
24              Set the limit on the size of a file.
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26       3      (Not  implemented  for  Linux.)   Return  the  maximum  possible
27              address of the data segment.
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29       4      (Implemented but no symbolic  constant  provided.)   Return  the
30              maximum number of files that the calling process can open.
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RETURN VALUE

33       On  success,  ulimit()  returns  a  nonnegative value.  On error, -1 is
34       returned, and errno is set appropriately.
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ERRORS

37       EPERM  A unprivileged process tried to increase a limit.
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CONFORMING TO

40       SVr4, POSIX.1-2001.  POSIX.1-2008 marks ulimit() as obsolete.
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COLOPHON

46       This page is part of release 3.53 of the Linux  man-pages  project.   A
47       description  of  the project, and information about reporting bugs, can
48       be found at http://www.kernel.org/doc/man-pages/.
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52Linux                             2008-08-06                         ULIMIT(3)