#!/bin/sh # Ensure we handle i/o errors correctly in csplit # Copyright (C) 2015-2018 Free Software Foundation, Inc. # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program. If not, see . . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src print_ver_ csplit require_gcc_shared_ if ! test -w /dev/full || ! test -c /dev/full; then skip_ '/dev/full is required' fi # Ensure error messages are in English LC_ALL=C export LC_ALL # Replace fwrite and ferror, always returning an error cat > k.c <<'EOF' || framework_failure_ #include #include #undef fwrite #undef fwrite_unlocked size_t fwrite (const void *ptr, size_t size, size_t nitems, FILE *stream) { fclose (fopen ("preloaded","w")); /* marker for preloaded interception */ errno = ENOSPC; return 0; } size_t fwrite_unlocked (const void *ptr, size_t size, size_t nitems, FILE *stream) { return fwrite (ptr, size, nitems, stream); } EOF # Get the wording of the OS-dependent ENOSPC message returns_ 1 seq 1 >/dev/full 2>msgt || framework_failure_ sed 's/seq: write error: //' msgt > msg || framework_failure_ # Create the expected error message { printf "%s" "csplit: write error for 'xx01': " ; cat msg ; } > exp \ || framework_failure_ # compile/link the interception shared library: gcc_shared_ k.c k.so \ || skip_ 'failed to build forced-fwrite-failure shared library' # Split the input, and force fwrite() failure - # the 'csplit' command should fail with exit code 1 # (checked with 'returns_ 1 ... || fail=1') seq 10 | (export LD_PRELOAD=$LD_PRELOAD:./k.so returns_ 1 csplit - 1 4 2>out) || fail=1 test -e preloaded || skip_ 'LD_PRELOAD interception failed' # Ensure we got the expected error message compare exp out || fail=1 Exit $fail