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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
# 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/>.
#
if : ; then
set -e
N=95
while :; do
# expr returns 1 if expression is null or 0
set +e
N_MOD_100=`expr $N % 100`
set -e
echo $N_MOD_100
N=`expr $N + 1`
if [ $N -eq 110 ]; then
break
fi
done
set +e
fi
(
set -e
false
echo bad
)
echo $?
x=$(
set -e
false
echo bad
)
echo $? $x
# command subst should not inherit -e
set -e
echo $(false; echo ok)
if set +e
then
false
fi
echo hi
set -e
# a failing command in the compound list following a while, until, or
# if should not cause the shell to exit
while false; do
echo hi
done
echo while succeeded
x=1
until (( x == 4 )); do
x=4
done
echo until succeeded: $x
if false; then
echo oops
fi
echo if succeeded
# failing commands that are part of an AND or OR list should not
# cause the shell to exit
false && echo AND list failed
echo AND list succeeded
false || echo OR list succeeded
! false
echo ! succeeded
# make sure eval preserves the state of the -e flag and `!' reserved word
set -e
if eval false; then
echo oops
fi
echo eval succeeded
! eval false
echo ! eval succeeded -- 1
! eval '(exit 5)'
echo ! eval succeeded -- 2
set -e
until builtin false; do echo a; break; done
echo $?
until eval false; do echo b; break; done
echo $?
: ${TMPDIR:=/tmp}
FN=$TMPDIR/set-e-$$
cat > $FN << EOF
false
echo after 1
false
EOF
set -e
until . $FN; do echo a; break; done
echo $?
rm -f $FN
set +e
${THIS_SH} ./set-e1.sub
${THIS_SH} ./set-e2.sub
${THIS_SH} ./set-e3.sub
|
