Diffusion FreeBSD src repository d05b53e0baee

Add sysctlbyname system call
d05b53e0baee
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Description

Add sysctlbyname system call

Previously userspace would issue one syscall to resolve the sysctl and then
another one to actually use it. Do it all in one trip.

Fallback is provided in case newer libc happens to be running on an older
kernel.

Submitted by: Pawel Biernacki
Reported by: kib, brooks
Differential Revision: https://reviews.freebsd.org/D17282

Details

Provenance

mjg	Authored on Sep 3 2019, 4:16 AM

Parents

rG209f2e983876: Add a sysctl to dump kernel mappings and their properties on amd64.

Branches

Unknown

Tags

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Event Timeline

se mentioned this in D34171: Restore access to "user.*" variables in sysctlbyname().Feb 4 2022, 8:37 PM

se mentioned this in rGaf7d105379a6: sysctlbyname(): restore access to user variables.Feb 9 2022, 10:11 PM

se mentioned this in rG23fe1083ca8c: libc: return partial sysctl() result if buffer is too small.Mar 4 2022, 7:55 PM

emaste mentioned this in D41967: copy_file_range: fix capabilities premissions.Sep 26 2023, 9:48 PM

Changes (20)

Path

Size

lib/

libc/

gen/

	sysctlbyname.c
	sysctlnametomib.c

sys/

Symbol.map

sys/

compat/

freebsd32/

freebsd32_systrace_args.c

kern/

sys/

rGd05b53e0baee

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lib/libc/gen/sysctlbyname.c

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lib/libc/sys/Symbol.map

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sys/compat/freebsd32/freebsd32_misc.c

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sys/compat/freebsd32/freebsd32_proto.h

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sys/compat/freebsd32/freebsd32_syscall.h

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sys/compat/freebsd32/freebsd32_syscalls.c

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sys/compat/freebsd32/freebsd32_sysent.c

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sys/compat/freebsd32/freebsd32_systrace_args.c

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sys/compat/freebsd32/syscalls.master

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sys/kern/capabilities.conf

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sys/kern/init_sysent.c

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sys/kern/kern_sysctl.c

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sys/kern/syscalls.c

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sys/kern/syscalls.master

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sys/kern/systrace_args.c

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sys/sys/param.h

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sys/sys/syscall.h

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sys/sys/syscall.mk

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sys/sys/sysctl.h

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Add sysctlbyname system calld05b53e0baeeActions

Description

Details

Event Timeline

Changes (20)

rGd05b53e0baee

lib/libc/gen/sysctlbyname.c

lib/libc/sys/Symbol.map

sys/compat/freebsd32/freebsd32_misc.c

sys/compat/freebsd32/freebsd32_proto.h

sys/compat/freebsd32/freebsd32_syscall.h

sys/compat/freebsd32/freebsd32_syscalls.c

sys/compat/freebsd32/freebsd32_sysent.c

sys/compat/freebsd32/freebsd32_systrace_args.c

sys/compat/freebsd32/syscalls.master

sys/kern/capabilities.conf

sys/kern/init_sysent.c

sys/kern/kern_sysctl.c

sys/kern/syscalls.c

sys/kern/syscalls.master

sys/kern/systrace_args.c

sys/sys/param.h

sys/sys/syscall.h

sys/sys/syscall.mk

sys/sys/sysctl.h

sys/sys/sysproto.h

Add sysctlbyname system call
d05b53e0baee
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