tests/misc/yes.sh

   1 #!/bin/sh
   2 # Validate yes buffer handling
   3
   4 # Copyright (C) 2015-2024 Free Software Foundation, Inc.
   5
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10
  11 # This program 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
  14 # GNU General Public License for more details.
  15
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  18
  19 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  20 print_ver_ yes
  21
  22 # Check basic operation
  23 test "$(yes | head -n1)" = 'y' || fail=1
  24
  25 # Check various single item sizes, with the most important
  26 # size being BUFSIZ used for the local buffer to yes(1).
  27 # Note a \n is added, so actual sizes required internally
  28 # are 1 more than the size used here.
  29 for size in 1 1999 4095 4096 8191 8192 16383 16384; do
  30   printf "%${size}s\n" '' > out.1
  31   yes "$(printf %${size}s '')" | head -n2 | uniq > out.2
  32   compare out.1 out.2 || fail=1
  33 done
  34
  35 # Check the many small items case,
  36 # both fitting and overflowing the internal buffer.
  37 # First check that 4000 arguments supported.
  38 if test 4000 -eq $(sh -c 'echo $#' 0 $(seq 4000)); then
  39   for i in 100 4000; do
  40     seq $i | paste -s -d ' ' | sed p > out.1
  41     yes $(seq $i) | head -n2 > out.2
  42     compare out.1 out.2 || fail=1
  43   done
  44 fi
  45
  46 # Check a single appropriate diagnostic is output on write error
  47 if test -w /dev/full && test -c /dev/full; then
  48   # The single output diagnostic expected,
  49   # (without the possibly varying :strerror(ENOSPC) suffix).
  50   printf '%s\n' "yes: standard output" > exp
  51
  52   for size in 1 16384; do
  53     returns_ 1 yes "$(printf %${size}s '')" >/dev/full 2>errt || fail=1
  54     sed 's/\(yes:.*\):.*/\1/' errt > err
  55     compare exp err || fail=1
  56   done
  57 fi
  58
  59 Exit $fail