92 lines
2.6 KiB
Bash
Executable file
92 lines
2.6 KiB
Bash
Executable file
#!/bin/sh
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# Ensure we handle i/o errors correctly in csplit
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# Copyright (C) 2015-2025 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program 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
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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print_ver_ csplit
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require_gcc_shared_
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if ! test -w /dev/full || ! test -c /dev/full; then
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skip_ '/dev/full is required'
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fi
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# Ensure error messages are in English
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LC_ALL=C
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export LC_ALL
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# Replace fwrite and ferror, always returning an error
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cat > k.c <<'EOF' || framework_failure_
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#include <stdio.h>
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#include <errno.h>
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#undef fwrite
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#undef fwrite_unlocked
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size_t
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fwrite (const void *ptr, size_t size, size_t nitems, FILE *stream)
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{
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if (stream == stderr)
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{
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/* Perform the normal operation of fwrite. */
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const char *p = ptr;
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size_t count = size * nitems;
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size_t i;
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for (i = 0; i < count; i++)
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if (putc ((unsigned char) *p++, stream) == EOF)
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break;
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return i / size;
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}
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else
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{
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fclose (fopen ("preloaded","w")); /* marker for preloaded interception */
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errno = ENOSPC;
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return 0;
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}
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}
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size_t
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fwrite_unlocked (const void *ptr, size_t size, size_t nitems, FILE *stream)
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{
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return fwrite (ptr, size, nitems, stream);
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}
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EOF
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# Get the wording of the OS-dependent ENOSPC message
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returns_ 1 seq 1 >/dev/full 2>msgt || framework_failure_
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sed 's/seq: write error: //' msgt > msg || framework_failure_
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# Create the expected error message
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{ printf "%s" "csplit: write error for 'xx01': " ; cat msg ; } > exp \
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|| framework_failure_
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# compile/link the interception shared library:
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gcc_shared_ k.c k.so \
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|| skip_ 'failed to build forced-fwrite-failure shared library'
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# Split the input, and force fwrite() failure -
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# the 'csplit' command should fail with exit code 1
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# (checked with 'returns_ 1 ... || fail=1')
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seq 10 |
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(export LD_PRELOAD=$LD_PRELOAD:./k.so
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returns_ 1 csplit - 1 4 2>out) || fail=1
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test -e preloaded || skip_ 'LD_PRELOAD interception failed'
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# Ensure we got the expected error message
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compare exp out || fail=1
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Exit $fail
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