[RFC PATCH 0/1] env: introduce variable value ranges
lukas.funke-oss at weidmueller.com
lukas.funke-oss at weidmueller.com
Mon Aug 26 14:51:10 CEST 2024
From: Lukas Funke <lukas.funke at weidmueller.com>
This series extends the flags-variable with ranges for environment
variables. The range is appended to the variable flags using
the '@'-character. A range can be decimal (min/max), bitmask or regular
expression (64 byte).
Value ranges for variables can be used to make the environment more
robust against faults such as invalid user input or attacks.
Decimal-range: foo:da@<min>-<max>
Hexadecimal-range(bitmask): bar:xa at 0xdeadbeed
Regex-range: mystring:sa at r"klaus|haus|maus"
Example:
"decimalvalue:dw at 100-200,"
...
=> env set decimalvalue 1
1 < 100 || 1 > 200
=> env set decimalvalue 150
=>
Lukas Funke (1):
env: introduce variable ranges
cmd/nvedit.c | 30 +++---
env/flags.c | 217 +++++++++++++++++++++++++++++++++++++-
include/configs/sandbox.h | 5 +
include/env_flags.h | 27 ++++-
include/search.h | 1 +
test/env/Makefile | 1 +
test/env/range.c | 113 ++++++++++++++++++++
7 files changed, 377 insertions(+), 17 deletions(-)
create mode 100644 test/env/range.c
--
2.30.2
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