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100 lines
2.9 KiB
Bash
100 lines
2.9 KiB
Bash
#!/bin/bash
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# Consistency checks for the system call list
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# Copyright (C) 2017-2020 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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#
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <https://www.gnu.org/licenses/>.
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export LC_ALL=C
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set -e
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set -o pipefail
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if test $# != 4; then
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echo "error: wrong number of arguments: $#"
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exit 1
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fi
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macros="$1"
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list_nr="$2"
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list_sys="$3"
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GAWK="$4"
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linux_version="$("$GAWK" \
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'/#define LINUX_VERSION_CODE / {print $3}' < "$macros")"
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glibc_linux_version="$("$GAWK" \
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'/#define __GLIBC_LINUX_VERSION_CODE / {print $3}' < "$macros")"
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echo "info: LINUX_VERSION_CODE: $linux_version"
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echo "info: __GLIBC_LINUX_VERSION_CODE: $glibc_linux_version"
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# Ignore the subrelease in the comparison.
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if test $(expr "$glibc_linux_version" / 256) \
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-lt $(expr "$linux_version" / 256); then
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echo "info: The kernel major/minor version is newer than the glibc version"
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kernel_newer=true
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else
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kernel_newer=false
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fi
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echo
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errors=0
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# Use getpid as a system call which is expected to be always defined.
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# alpha uses getxpid instead, so it is permitted as an alternative.
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if ! grep -E -q '^getx?pid$' -- "$list_nr"; then
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echo "error: __NR_getpid not defined"
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errors=1
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fi
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if ! grep -E -q '^getx?pid$' -- "$list_sys"; then
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echo "error: SYS_getpid not defined"
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errors=1
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fi
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comm_1="$(mktemp)"
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comm_2="$(mktemp)"
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comm_result="$(mktemp)"
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cleanup () {
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rm -f -- "$comm_1" "$comm_2" "$comm_result"
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}
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trap cleanup 0
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sort -o "$comm_1" -- "$list_nr"
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sort -o "$comm_2" -- "$list_sys"
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# Check for missing SYS_* macros.
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comm --check-order -2 -3 -- "$comm_1" "$comm_2" > "$comm_result"
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if test -s "$comm_result"; then
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echo "error: These system calls need to be added to syscall-names.list:"
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cat -- "$comm_result"
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# This is only an error if our version is older than the kernel
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# version because we cannot predict future kernel development.
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if $kernel_newer; then
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echo
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echo "warning: This error has been ignored because the glibc"
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echo "warning: system call list is older than the kernel version."
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else
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errors=1
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fi
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fi
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# Check for additional SYS_* macros.
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comm --check-order -1 -3 -- "$comm_1" "$comm_2" > "$comm_result"
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if test -s "$comm_result"; then
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echo "error: The following system calls have unexpected SYS_* macros:"
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cat -- "$comm_result"
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errors=1
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fi
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exit "$errors"
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