Manpages - ulimit.3

ulimit - get and set user limits

  #include <ulimit.h>

  long ulimit(int cmd, long newlimit);

Warning: this routine is obsolete.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.

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

EPERM

An unprivileged process tried to increase a limit.

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

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

*bash*(1), *getrlimit*(2), *setrlimit*(2), *sysconf*(3)

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