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Implement POSIX.1-2001 (XSI)'s ulimit(3).
Submitted by: Kyle Martin <mkm@ieee.org>
This commit is contained in:
Mike Barcroft
parent
315009a483
commit
af8c0bce98
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=101497
@ -21,7 +21,8 @@ INCS= a.out.h ar.h assert.h bitstring.h complex.h cpio.h ctype.h db.h \
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search.h setjmp.h sgtty.h \
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signal.h stab.h stdbool.h stddef.h stdio.h stdlib.h strhash.h \
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string.h stringlist.h strings.h sysexits.h tar.h time.h timeconv.h \
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timers.h ttyent.h unistd.h utime.h utmp.h vis.h wchar.h wctype.h
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timers.h ttyent.h ulimit.h unistd.h utime.h utmp.h vis.h wchar.h \
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wctype.h
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MHDRS= float.h floatingpoint.h stdarg.h varargs.h
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37
include/ulimit.h
Normal file
37
include/ulimit.h
Normal file
@ -0,0 +1,37 @@
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/*-
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* Copyright (c) 2002 Kyle Martin <mkm@ieee.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _ULIMIT_H_
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#define _ULIMIT_H_
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#define UL_GETSIZE 1
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#define UL_SETSIZE 2
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long ulimit(int, ...);
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#endif /* !_ULIMIT_H_ */
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@ -28,8 +28,8 @@ SRCS+= __xuname.c _pthread_stubs.c _rand48.c _spinlock_stub.c _thread_init.c \
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sigsetops.c sleep.c srand48.c statvfs.c stringlist.c strtofflags.c \
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sysconf.c sysctl.c sysctlbyname.c sysctlnametomib.c \
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syslog.c telldir.c termios.c time.c times.c timezone.c ttyname.c \
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ttyslot.c ualarm.c uname.c unvis.c usleep.c utime.c valloc.c vis.c \
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wait.c wait3.c waitpid.c
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ttyslot.c ualarm.c ulimit.c uname.c unvis.c usleep.c utime.c \
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valloc.c vis.c wait.c wait3.c waitpid.c
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# machine-dependent gen sources
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.if exists(${.CURDIR}/../libc/${MACHINE_ARCH}/gen/Makefile.inc)
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@ -56,7 +56,7 @@ MAN+= alarm.3 arc4random.3 \
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siginterrupt.3 signal.3 sigsetops.3 sleep.3 statvfs.3 stringlist.3 \
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strtofflags.3 sysconf.3 sysctl.3 syslog.3 tcgetpgrp.3 \
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tcsendbreak.3 tcsetattr.3 tcsetpgrp.3 time.3 times.3 timezone.3 \
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ttyname.3 tzset.3 ualarm.3 uname.3 unvis.3 usleep.3 utime.3 \
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ttyname.3 tzset.3 ualarm.3 ulimit.3 uname.3 unvis.3 usleep.3 utime.3 \
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valloc.3 vis.3
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MLINKS+=arc4random.3 arc4random_addrandom.3 arc4random.3 arc4random_stir.3
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100
lib/libc/gen/ulimit.3
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100
lib/libc/gen/ulimit.3
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@ -0,0 +1,100 @@
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.\" Copyright (c) 2002 Kyle Martin. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd August 8, 2002
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.Dt ULIMIT 3
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.Os
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.Sh NAME
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.Nm ulimit
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.Nd get and set process limits
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In ulimit.h
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.Ft long
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.Fn ulimit "int cmd" "..."
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.Sh DESCRIPTION
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The
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.Fn ulimit
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function will get and set process limits.
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Currently this is limited to the maximum file size.
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The
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.Va cmd
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parameter is one of the following:
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.Pp
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.Bl -tag -offset -width UL_GETSIZE
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.It Dv UL_GETSIZE
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will return the maximum file size in units of 512 blocks of
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the current process.
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.Pp
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.It Dv UL_SETSIZE
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will attempt to set the maximum file size of the current
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process and its children with the second argument expressed as a long.
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.El
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.Sh RETURN VALUES
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Upon successful completion,
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.Fn ulimit
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returns the value requested;
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otherwise the value -1 is returned and
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.Ar errno
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is set to indicate the error.
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.Sh ERRORS
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The
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.Fn ulimit
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function will fail if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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The command specified was invalid.
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.It Bq Er EPERM
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The limit specified to
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.Fn ulimit
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would have raised the maximum limit value,
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and the caller is not the super-user.
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.El
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.Sh SEE ALSO
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.Xr getrlimit 2
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.Sh STANDARDS
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The
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.Fn ulimit
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function conforms to
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.St -p1003.1-2001 .
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.Sh HISTORY
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The
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.Fn ulimit
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function first appeared in
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.Fx 5.0 .
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.Sh BUGS
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The
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.Fn ulimit
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function provides limited precision for
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setting and retrieving process limits.
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If there is a need for greater precision than the
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type
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.Vt long
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provides, the
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.Xr getrlimit 2
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and
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.Xr setrlimit 2
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functions should be considered.
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68
lib/libc/gen/ulimit.c
Normal file
68
lib/libc/gen/ulimit.c
Normal file
@ -0,0 +1,68 @@
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/*-
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* Copyright (c) 2002 Kyle Martin <mkm@ieee.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdarg.h>
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#include <ulimit.h>
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long
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ulimit(int cmd, ...)
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{
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struct rlimit limit;
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va_list ap;
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long arg, size;
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if (cmd == UL_GETSIZE) {
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if (getrlimit(RLIMIT_FSIZE, &limit) == -1)
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return (-1);
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limit.rlim_cur /= 512;
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if (limit.rlim_cur > LONG_MAX)
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return (LONG_MAX);
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return ((long)limit.rlim_cur);
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} else if (cmd == UL_SETSIZE) {
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va_start(ap, cmd);
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arg = va_arg(ap, long);
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va_end(ap);
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limit.rlim_max = limit.rlim_cur = (rlim_t)arg * 512;
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/* The setrlimit() function sets errno to EPERM if needed. */
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if (setrlimit(RLIMIT_FSIZE, &limit) == -1)
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return (-1);
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if (arg * 512 > LONG_MAX)
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return (LONG_MAX);
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return (arg);
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} else {
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errno = EINVAL;
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return (-1);
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}
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}
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@ -178,6 +178,7 @@ raised the maximum limit value, and the caller is not the super-user.
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.Xr quotactl 2 ,
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.Xr sigaltstack 2 ,
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.Xr sigvec 2 ,
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.Xr ulimit 3 ,
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.Xr sysctl 3
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.Sh HISTORY
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The
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