ulimit
Section: C Library Functions (3)
Updated: 2022-12-15
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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Warning: this routine is obsolete.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
SVr4, POSIX.1-2001.
POSIX.1-2008 marks
ulimit()
as obsolete.
SEE ALSO
bash(1),
getrlimit(2),
setrlimit(2),
sysconf(3)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- ATTRIBUTES
-
- STANDARDS
-
- SEE ALSO
-
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