1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
#!/bin/sh
# Ensure we handle i/o errors correctly in csplit
# Copyright (C) 2015 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 <http://www.gnu.org/licenses/>.
. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
print_ver_ csplit
require_gcc_shared_
if ! test -w /dev/full || ! test -c /dev/full; then
skip_ '/dev/full is required'
fi
# Ensure error messages are in English
LC_ALL=C
export LC_ALL
# Replace fwrite and ferror, always returning an error
cat > k.c <<'EOF' || framework_failure_
#include <stdio.h>
#include <errno.h>
#undef fwrite
#undef fwrite_unlocked
size_t
fwrite (const void *ptr, size_t size, size_t nitems, FILE *stream)
{
fclose (fopen ("preloaded","w")); /* marker for preloaded interception */
errno = ENOSPC;
return 0;
}
size_t
fwrite_unlocked (const void *ptr, size_t size, size_t nitems, FILE *stream)
{
return fwrite (ptr, size, nitems, stream);
}
EOF
# Get the wording of the OS-dependent ENOSPC message
returns_ 1 seq 1 >/dev/full 2>msgt || framework_failure_
sed 's/seq: write error: //' msgt > msg || framework_failure_
# Create the expected error message
{ printf "%s" "csplit: write error for 'xx01': " ; cat msg ; } > exp \
|| framework_failure_
# compile/link the interception shared library:
gcc_shared_ k.c k.so \
|| skip_ 'failed to build forced-fwrite-failure shared library'
# Split the input, and force fwrite() failure -
# the 'csplit' command should fail with exit code 1
# (checked with 'returns_ 1 ... || fail=1')
seq 10 \
| LD_PRELOAD=$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
|
