sysdeps/unix/sysv/linux/tst-syscall-list.sh

   1 #!/bin/bash
   2 # Consistency checks for the system call list
   3 # Copyright (C) 2017-2021 Free Software Foundation, Inc.
   4 # This file is part of the GNU C Library.
   5 #
   6 # The GNU C Library is free software; you can redistribute it and/or
   7 # modify it under the terms of the GNU Lesser General Public
   8 # License as published by the Free Software Foundation; either
   9 # version 2.1 of the License, or (at your option) any later version.
  10 #
  11 # The GNU C Library is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 # Lesser General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU Lesser General Public
  17 # License along with the GNU C Library; if not, see
  18 # <https://www.gnu.org/licenses/>.
  19
  20 export LC_ALL=C
  21 set -e
  22 set -o pipefail
  23
  24 if test $# != 4; then
  25     echo "error: wrong number of arguments: $#"
  26     exit 1
  27 fi
  28
  29 macros="$1"
  30 list_nr="$2"
  31 list_sys="$3"
  32 GAWK="$4"
  33
  34 linux_version="$("$GAWK" \
  35   '/#define LINUX_VERSION_CODE / {print $3}' < "$macros")"
  36 glibc_linux_version="$("$GAWK" \
  37   '/#define __GLIBC_LINUX_VERSION_CODE / {print $3}' < "$macros")"
  38
  39 echo "info: LINUX_VERSION_CODE: $linux_version"
  40 echo "info: __GLIBC_LINUX_VERSION_CODE: $glibc_linux_version"
  41 # Ignore the subrelease in the comparison.
  42 if test $(expr "$glibc_linux_version" / 256) \
  43         -lt $(expr "$linux_version" / 256); then
  44     echo "info: The kernel major/minor version is newer than the glibc version"
  45     kernel_newer=true
  46 else
  47     kernel_newer=false
  48 fi
  49 echo
  50
  51 errors=0
  52
  53 # Use getpid as a system call which is expected to be always defined.
  54 # alpha uses getxpid instead, so it is permitted as an alternative.
  55 if ! grep -E -q '^getx?pid$' -- "$list_nr"; then
  56     echo "error: __NR_getpid not defined"
  57     errors=1
  58 fi
  59 if ! grep -E -q '^getx?pid$' -- "$list_sys"; then
  60     echo "error: SYS_getpid not defined"
  61     errors=1
  62 fi
  63
  64 comm_1="$(mktemp)"
  65 comm_2="$(mktemp)"
  66 comm_result="$(mktemp)"
  67 cleanup () {
  68     rm -f -- "$comm_1" "$comm_2" "$comm_result"
  69 }
  70 trap cleanup 0
  71
  72 sort -o "$comm_1" -- "$list_nr"
  73 sort -o "$comm_2" -- "$list_sys"
  74
  75 # Check for missing SYS_* macros.
  76 comm --check-order -2 -3 -- "$comm_1" "$comm_2" > "$comm_result"
  77 if test -s "$comm_result"; then
  78     echo "error: These system calls need to be added to syscall-names.list:"
  79     cat -- "$comm_result"
  80     # This is only an error if our version is older than the kernel
  81     # version because we cannot predict future kernel development.
  82     if $kernel_newer; then
  83         echo
  84         echo "warning: This error has been ignored because the glibc"
  85         echo "warning: system call list is older than the kernel version."
  86     else
  87         errors=1
  88     fi
  89 fi
  90
  91 # Check for additional SYS_* macros.
  92 comm --check-order -1 -3 -- "$comm_1" "$comm_2" > "$comm_result"
  93 if test -s "$comm_result"; then
  94     echo "error: The following system calls have unexpected SYS_* macros:"
  95     cat -- "$comm_result"
  96     errors=1
  97 fi
  98
  99 exit "$errors"