diff options
author | phk <phk@FreeBSD.org> | 1997-05-30 20:53:13 +0000 |
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committer | phk <phk@FreeBSD.org> | 1997-05-30 20:53:13 +0000 |
commit | 452665122f83327067d7bc2e9a2534f441170acf (patch) | |
tree | cf07565918b931095fa2c0fd2bed51f9abe831ec /lib | |
parent | 51cf1d5bbcad7d42aa7e5c3e2585826a5c49b4d1 (diff) | |
download | FreeBSD-src-452665122f83327067d7bc2e9a2534f441170acf.zip FreeBSD-src-452665122f83327067d7bc2e9a2534f441170acf.tar.gz |
sysctlbyname allows acces to sysctl variables by name.
The manpage has been sent to linquistic decontamination and will arrive
when released from the quarantine
Reviewed by: peter
Diffstat (limited to 'lib')
-rw-r--r-- | lib/libc/gen/Makefile.inc | 4 | ||||
-rw-r--r-- | lib/libc/gen/sysctlbyname.c | 33 |
2 files changed, 35 insertions, 2 deletions
diff --git a/lib/libc/gen/Makefile.inc b/lib/libc/gen/Makefile.inc index 4f13707..e5f7a28 100644 --- a/lib/libc/gen/Makefile.inc +++ b/lib/libc/gen/Makefile.inc @@ -1,5 +1,5 @@ # @(#)Makefile.inc 8.6 (Berkeley) 5/4/95 -# $Id: Makefile.inc,v 1.31 1997/04/13 15:12:14 davidn Exp $ +# $Id: Makefile.inc,v 1.33 1997/05/03 03:49:54 jb Exp $ # machine-independent gen sources .PATH: ${.CURDIR}/../libc/${MACHINE}/gen ${.CURDIR}/../libc/gen @@ -17,7 +17,7 @@ SRCS+= alarm.c assert.c clock.c closedir.c config.c confstr.c crypt.c \ scandir.c seekdir.c semconfig.c semctl.c semget.c semop.c \ setdomainname.c sethostname.c setjmperr.c setmode.c shmat.c \ shmctl.c shmdt.c shmget.c siginterrupt.c siglist.c signal.c \ - sigsetops.c sleep.c sysconf.c sysctl.c syslog.c \ + sigsetops.c sleep.c sysconf.c sysctl.c sysctlbyname.c syslog.c \ telldir.c termios.c time.c times.c timezone.c ttyname.c ttyslot.c \ ualarm.c uname.c unvis.c usleep.c utime.c valloc.c vis.c wait.c \ wait3.c waitpid.c diff --git a/lib/libc/gen/sysctlbyname.c b/lib/libc/gen/sysctlbyname.c new file mode 100644 index 0000000..a3133af --- /dev/null +++ b/lib/libc/gen/sysctlbyname.c @@ -0,0 +1,33 @@ +/* + * ---------------------------------------------------------------------------- + * "THE BEER-WARE LICENSE" (Revision 42): + * <phk@FreeBSD.org> wrote this file. As long as you retain this notice you + * can do whatever you want with this stuff. If we meet some day, and you think + * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp + * ---------------------------------------------------------------------------- + * + * $Id$ + * + */ +#include <sys/types.h> +#include <sys/sysctl.h> + +int +sysctlbyname(char *name, void *oldp, size_t *oldlenp, void *newp, size_t newlen) +{ + int name2oid_oid[2]; + int real_oid[CTL_MAXNAME+2]; + int error, oidlen; + + name2oid_oid[0] = 0; /* This is magic & undocumented! */ + name2oid_oid[1] = 3; + + oidlen = sizeof(real_oid); + error = sysctl(name2oid_oid, 2, real_oid, &oidlen, name, strlen(name)); + if (error < 0) + return error; + oidlen /= sizeof (int); + error = sysctl(real_oid, oidlen, oldp, oldlenp, newp, newlen); + return (error); +} + |