tools/testing/selftests/splice/short_splice_read.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 set -e
   4
   5 ret=0
   6
   7 do_splice()
   8 {
   9         filename="$1"
  10         bytes="$2"
  11         expected="$3"
  12
  13         out=$(./splice_read "$filename" "$bytes" | cat)
  14         if [ "$out" = "$expected" ] ; then
  15                 echo "ok: $filename $bytes"
  16         else
  17                 echo "FAIL: $filename $bytes"
  18                 ret=1
  19         fi
  20 }
  21
  22 test_splice()
  23 {
  24         filename="$1"
  25
  26         full=$(cat "$filename")
  27         two=$(echo "$full" | grep -m1 . | cut -c-2)
  28
  29         # Make sure full splice has the same contents as a standard read.
  30         do_splice "$filename" 4096 "$full"
  31
  32         # Make sure a partial splice see the first two characters.
  33         do_splice "$filename" 2 "$two"
  34 }
  35
  36 # proc_single_open(), seq_read()
  37 test_splice /proc/$$/limits
  38 # special open, seq_read()
  39 test_splice /proc/$$/comm
  40
  41 # proc_handler, proc_dointvec_minmax
  42 test_splice /proc/sys/fs/nr_open
  43 # proc_handler, proc_dostring
  44 test_splice /proc/sys/kernel/modprobe
  45 # proc_handler, special read
  46 test_splice /proc/sys/kernel/version
  47
  48 if ! [ -d /sys/module/test_module/sections ] ; then
  49         modprobe test_module
  50 fi
  51 # kernfs, attr
  52 test_splice /sys/module/test_module/coresize
  53 # kernfs, binattr
  54 test_splice /sys/module/test_module/sections/.init.text
  55
  56 exit $ret