1 |
## compare_shells: bash dash mksh zsh
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2 |
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3 |
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4 |
# Interesting interpretation of constants.
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5 |
#
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6 |
# "Constants with a leading 0 are interpreted as octal numbers. A leading ‘0x’
|
7 |
# or ‘0X’ denotes hexadecimal. Otherwise, numbers take the form [base#]n, where
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8 |
# the optional base is a decimal number between 2 and 64 representing the
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9 |
# arithmetic base, and n is a number in that base. If base# is omitted, then
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10 |
# base 10 is used. When specifying n, the digits greater than 9 are represented
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11 |
# by the lowercase letters, the uppercase letters, ‘@’, and ‘_’, in that order.
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12 |
# If base is less than or equal to 36, lowercase and uppercase letters may be
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13 |
# used interchangeably to represent numbers between 10 and 35. "
|
14 |
#
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15 |
# NOTE $(( 8#9 )) can fail, and this can be done at parse time...
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16 |
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17 |
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18 |
a=(4 5 6)
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19 |
echo "${a[b=2]} b=$b"
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20 |
## stdout: 6 b=2
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21 |
## OK zsh stdout: 5 b=2
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22 |
## N-I dash stdout-json: ""
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23 |
## N-I dash status: 2
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24 |
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25 |
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26 |
i=1
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27 |
echo $(($i+1))
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28 |
## stdout: 2
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29 |
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30 |
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31 |
i=1
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32 |
echo $((i+1))
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33 |
## stdout: 2
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34 |
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35 |
|
36 |
j=0
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37 |
echo $(($j + 42))
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38 |
## stdout: 42
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39 |
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40 |
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echo $((${j:-5} + 1))
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42 |
## stdout: 6
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43 |
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44 |
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45 |
foo=1; echo $((foo+1))bar$(($foo+1))
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46 |
## stdout: 2bar2
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47 |
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48 |
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49 |
# Making 13 from two different kinds of sub. Geez.
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50 |
echo $((1 + $(echo 1)${undefined:-3}))
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51 |
## stdout: 14
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52 |
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53 |
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54 |
# NOTE: Compare with [[. That is a COMMAND level expression, while this is a
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55 |
# WORD level expression.
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56 |
echo $(('1' + 2))
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57 |
## status: 0
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58 |
## N-I bash/zsh status: 1
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59 |
## N-I dash status: 2
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60 |
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61 |
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62 |
# This is unnecessary but works in all shells.
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63 |
echo $((1 + $((2 + 3)) + 4))
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64 |
## stdout: 10
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65 |
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66 |
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# This is unnecessary but works in all shells.
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68 |
echo $((`echo 1` + 2))
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69 |
## stdout: 3
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70 |
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71 |
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72 |
# bash, mksh, and zsh all treat strings that don't look like numbers as zero.
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73 |
shopt -u strict_arith || true
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74 |
s=foo
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75 |
echo $((s+5))
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76 |
## OK dash stdout-json: ""
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77 |
## OK dash status: 2
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78 |
## OK bash/mksh/zsh/osh stdout: 5
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## OK bash/mksh/zsh/osh status: 0
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80 |
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81 |
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shopt -s strict_arith || true
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s=foo
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echo $s
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echo $((s+5))
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echo 'should not get here'
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## status: 1
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88 |
## STDOUT:
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foo
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## END
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## OK dash status: 2
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## N-I bash/mksh/zsh STDOUT:
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foo
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5
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should not get here
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## END
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## N-I bash/mksh/zsh status: 0
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98 |
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99 |
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echo $((1
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101 |
+ 2))
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102 |
## stdout: 3
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103 |
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104 |
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a=1
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b=2
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echo $((a>b?5:10))
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108 |
## stdout: 10
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109 |
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110 |
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a=4
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echo $((++a))
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113 |
echo $a
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114 |
## stdout-json: "5\n5\n"
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115 |
## N-I dash status: 0
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116 |
## N-I dash stdout-json: "4\n4\n"
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117 |
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118 |
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a=4
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echo $((a++))
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echo $a
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## stdout-json: "4\n5\n"
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## N-I dash status: 2
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124 |
## N-I dash stdout-json: ""
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125 |
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shopt -u strict_arith || true
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(( undef1++ ))
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(( ++undef2 ))
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echo "[$undef1][$undef2]"
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## stdout: [1][1]
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## N-I dash stdout: [][]
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133 |
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shopt -u strict_arith || true
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a=(5 6 7 8)
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(( a[0]++, ++a[1], a[2]--, --a[3] ))
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(( undef[0]++, ++undef[1], undef[2]--, --undef[3] ))
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139 |
echo "${a[@]}" - "${undef[@]}"
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## stdout: 6 7 6 7 - 1 1 -1 -1
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## N-I dash stdout-json: ""
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## N-I dash status: 2
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## BUG zsh stdout: 5 6 7 8 -
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set -o nounset
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(( undef1++ ))
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(( ++undef2 ))
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echo "[$undef1][$undef2]"
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## stdout-json: ""
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## status: 1
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## OK dash status: 2
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153 |
## BUG mksh/zsh status: 0
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## BUG mksh/zsh stdout-json: "[1][1]\n"
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a=1
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b=2
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echo $((a,(b+1)))
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## stdout: 3
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161 |
## N-I dash status: 2
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162 |
## N-I dash stdout-json: ""
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163 |
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a=4
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echo $((a+=1))
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echo $a
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## stdout-json: "5\n5\n"
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echo $(( 1 == 1 ))
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echo $(( 1 != 1 ))
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echo $(( 1 < 1 ))
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echo $(( 1 <= 1 ))
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echo $(( 1 > 1 ))
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echo $(( 1 >= 1 ))
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## stdout-json: "1\n0\n0\n1\n0\n1\n"
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echo $((1 || 2))
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echo $((1 && 2))
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echo $((!(1 || 2)))
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## stdout-json: "1\n1\n0\n"
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184 |
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x=11
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(( 1 || (x = 22) ))
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echo $x
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(( 0 || (x = 33) ))
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echo $x
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(( 0 && (x = 44) ))
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echo $x
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(( 1 && (x = 55) ))
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echo $x
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## stdout-json: "11\n33\n33\n55\n"
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## N-I dash stdout-json: "11\n11\n11\n11\n"
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echo $((1|2))
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echo $((1&2))
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echo $((1^2))
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echo $((~(1|2)))
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## stdout-json: "3\n0\n3\n-4\n"
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204 |
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a=1
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b=3
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echo $((- a + + b))
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209 |
## stdout-json: "2\n"
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210 |
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211 |
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echo $((1 + 2.3))
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213 |
## status: 2
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214 |
## OK bash/mksh status: 1
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215 |
## BUG zsh status: 0
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216 |
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217 |
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218 |
# zsh does 1-based indexing!
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219 |
array=(1 2 3 4)
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echo $((array[1] + array[2]*3))
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221 |
## stdout: 11
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222 |
## OK zsh stdout: 7
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223 |
## N-I dash status: 2
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224 |
## N-I dash stdout-json: ""
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225 |
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226 |
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227 |
echo $((36#a))-$((36#z))
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228 |
## stdout: 10-35
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229 |
## N-I dash stdout-json: ""
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230 |
## N-I dash status: 2
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231 |
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232 |
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233 |
# This is a truly bizarre syntax. Oh it comes from zsh... which allows 36.
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echo $((64#a))-$((64#z)), $((64#A))-$((64#Z)), $((64#@)), $(( 64#_ ))
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235 |
## stdout: 10-35, 36-61, 62, 63
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236 |
## N-I dash stdout-json: ""
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237 |
## N-I dash status: 2
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238 |
## N-I mksh/zsh stdout-json: ""
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239 |
## N-I mksh/zsh status: 1
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240 |
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241 |
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242 |
echo $((10#0123)), $((16#1b))
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243 |
## stdout: 123, 27
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244 |
## N-I dash stdout-json: ""
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245 |
## N-I dash status: 2
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246 |
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247 |
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248 |
base=16
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249 |
echo $(( ${base}#a ))
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250 |
## stdout: 10
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251 |
## N-I dash stdout-json: ""
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252 |
## N-I dash status: 2
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253 |
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254 |
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255 |
echo $(( 011 ))
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256 |
## stdout: 9
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257 |
## N-I mksh/zsh stdout: 11
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258 |
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259 |
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260 |
zero=0
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261 |
echo $(( ${zero}11 ))
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262 |
## stdout: 9
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263 |
## N-I mksh/zsh stdout: 11
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264 |
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265 |
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266 |
zero=0
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267 |
echo $(( ${zero}xAB ))
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268 |
## stdout: 171
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269 |
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270 |
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271 |
foo=5
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272 |
x=oo
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273 |
echo $(( foo + f$x + 1 ))
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274 |
## stdout: 11
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275 |
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276 |
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277 |
foo=5
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278 |
bar=foo
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279 |
spam=bar
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280 |
eggs=spam
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281 |
echo $((foo+1)) $((bar+1)) $((spam+1)) $((eggs+1))
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282 |
## stdout: 6 6 6 6
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283 |
## N-I dash stdout-json: ""
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284 |
## N-I dash status: 2
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285 |
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286 |
|
287 |
set -o nounset
|
288 |
x=$(( y + 5 ))
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289 |
echo "should not get here: x=${x:-<unset>}"
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290 |
## stdout-json: ""
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291 |
## status: 1
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292 |
## BUG dash/mksh/zsh stdout: should not get here: x=5
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293 |
## BUG dash/mksh/zsh status: 0
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294 |
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295 |
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296 |
|
297 |
a=$(( 1 << 31 ))
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298 |
echo $a
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299 |
|
300 |
b=$(( a + a ))
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301 |
echo $b
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302 |
|
303 |
c=$(( b + a ))
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304 |
echo $c
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305 |
|
306 |
x=$(( 1 << 62 ))
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307 |
y=$(( x - 1 ))
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308 |
echo "max positive = $(( x + y ))"
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309 |
|
310 |
#echo "overflow $(( x + x ))"
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311 |
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312 |
## STDOUT:
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313 |
2147483648
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314 |
4294967296
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315 |
6442450944
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316 |
max positive = 9223372036854775807
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317 |
## END
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318 |
|
319 |
# mksh still uses int!
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320 |
## BUG mksh STDOUT:
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321 |
-2147483648
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322 |
0
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323 |
-2147483648
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324 |
max positive = 2147483647
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325 |
## END
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326 |
|
327 |
|
328 |
case $SH in dash) exit ;; esac
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329 |
|
330 |
#shopt -s strict_arith
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331 |
|
332 |
# This overflows - the extra 9 puts it above 2**31
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333 |
#echo $(( 12345678909 ))
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334 |
|
335 |
[[ 12345678909 = $(( 1 << 30 )) ]]
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336 |
echo eq=$?
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337 |
[[ 12345678909 = 12345678909 ]]
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338 |
echo eq=$?
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339 |
|
340 |
# Try both [ and [[
|
341 |
[ 12345678909 -gt $(( 1 << 30 )) ]
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342 |
echo greater=$?
|
343 |
[[ 12345678909 -gt $(( 1 << 30 )) ]]
|
344 |
echo greater=$?
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345 |
|
346 |
[[ 12345678909 -ge $(( 1 << 30 )) ]]
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347 |
echo ge=$?
|
348 |
[[ 12345678909 -ge 12345678909 ]]
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349 |
echo ge=$?
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350 |
|
351 |
[[ 12345678909 -le $(( 1 << 30 )) ]]
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352 |
echo le=$?
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353 |
[[ 12345678909 -le 12345678909 ]]
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354 |
echo le=$?
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355 |
|
356 |
## STDOUT:
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357 |
eq=1
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358 |
eq=0
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359 |
greater=0
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360 |
greater=0
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361 |
ge=0
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362 |
ge=0
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363 |
le=1
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364 |
le=0
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365 |
## END
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366 |
## N-I dash STDOUT:
|
367 |
## END
|
368 |
## BUG mksh STDOUT:
|
369 |
eq=1
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370 |
eq=0
|
371 |
greater=1
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372 |
greater=1
|
373 |
ge=1
|
374 |
ge=0
|
375 |
le=0
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376 |
le=0
|
377 |
## END
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378 |
|
379 |
# mksh still uses int!
|
380 |
|
381 |
|
382 |
a=9
|
383 |
(( (a + 2) = 3 ))
|
384 |
echo $a
|
385 |
## status: 2
|
386 |
## stdout-json: ""
|
387 |
## OK bash/mksh/zsh stdout: 9
|
388 |
## OK bash/mksh/zsh status: 0
|
389 |
# dash doesn't implement assignment
|
390 |
## N-I dash status: 2
|
391 |
## N-I dash stdout-json: ""
|
392 |
|
393 |
|
394 |
(( 1[2] = 3 ))
|
395 |
echo "status=$?"
|
396 |
## status: 1
|
397 |
## stdout-json: ""
|
398 |
|
399 |
## OK bash stdout: status=1
|
400 |
## OK bash status: 0
|
401 |
|
402 |
## OK mksh/zsh stdout: status=2
|
403 |
## OK mksh/zsh status: 0
|
404 |
|
405 |
## N-I dash stdout: status=127
|
406 |
## N-I dash status: 0
|
407 |
|
408 |
|
409 |
(( a[1][2] = 3 ))
|
410 |
echo "status=$?"
|
411 |
# shells treat this as a NON-fatal error
|
412 |
## status: 2
|
413 |
## stdout-json: ""
|
414 |
## OK bash stdout: status=1
|
415 |
## OK mksh/zsh stdout: status=2
|
416 |
## OK bash/mksh/zsh status: 0
|
417 |
# dash doesn't implement assignment
|
418 |
## N-I dash stdout: status=127
|
419 |
## N-I dash status: 0
|
420 |
|
421 |
|
422 |
echo $(( 1 + 2*3 - 8/2 ))
|
423 |
## stdout: 3
|
424 |
|
425 |
|
426 |
echo $(( 3 ** 0 ))
|
427 |
echo $(( 3 ** 1 ))
|
428 |
echo $(( 3 ** 2 ))
|
429 |
## STDOUT:
|
430 |
1
|
431 |
3
|
432 |
9
|
433 |
## END
|
434 |
## N-I dash stdout-json: ""
|
435 |
## N-I dash status: 2
|
436 |
## N-I mksh stdout-json: ""
|
437 |
## N-I mksh status: 1
|
438 |
|
439 |
|
440 |
# NOTE: All shells agree on this, but R and Python give -9, which is more
|
441 |
# mathematically correct.
|
442 |
echo $(( -3 ** 2 ))
|
443 |
## stdout: 9
|
444 |
## N-I dash stdout-json: ""
|
445 |
## N-I dash status: 2
|
446 |
## N-I mksh stdout-json: ""
|
447 |
## N-I mksh status: 1
|
448 |
|
449 |
|
450 |
# bash explicitly disallows negative exponents!
|
451 |
echo $(( 2**-1 * 5 ))
|
452 |
## stdout-json: ""
|
453 |
## status: 1
|
454 |
## OK zsh stdout: 2.5
|
455 |
## OK zsh status: 0
|
456 |
## N-I dash stdout-json: ""
|
457 |
## N-I dash status: 2
|
458 |
|
459 |
|
460 |
echo $((
|
461 |
1 +
|
462 |
2 + \
|
463 |
3
|
464 |
))
|
465 |
echo $((
|
466 |
1 + 2 # not a comment
|
467 |
))
|
468 |
(( a = 3 + 4 # comment
|
469 |
))
|
470 |
echo [$a]
|
471 |
## status: 1
|
472 |
## STDOUT:
|
473 |
6
|
474 |
## END
|
475 |
## OK dash/osh status: 2
|
476 |
## OK bash STDOUT:
|
477 |
6
|
478 |
[]
|
479 |
## END
|
480 |
## OK bash status: 0
|
481 |
|
482 |
|
483 |
declare -a array=(1 2 3)
|
484 |
echo $((array + 5))
|
485 |
## status: 0
|
486 |
## STDOUT:
|
487 |
6
|
488 |
## END
|
489 |
## N-I dash status: 2
|
490 |
## N-I dash stdout-json: ""
|
491 |
## N-I mksh/zsh status: 1
|
492 |
## N-I mksh/zsh stdout-json: ""
|
493 |
|
494 |
|
495 |
typeset -A assoc
|
496 |
assoc[0]=42
|
497 |
echo $((assoc + 5))
|
498 |
## status: 0
|
499 |
## stdout: 47
|
500 |
## BUG dash status: 0
|
501 |
## BUG dash stdout: 5
|
502 |
|
503 |
|
504 |
a=(1 2 3)
|
505 |
echo $(( a[1] ))
|
506 |
echo $(( a[1][1] ))
|
507 |
## status: 1
|
508 |
## OK osh status: 2
|
509 |
## STDOUT:
|
510 |
2
|
511 |
## END
|
512 |
## N-I dash status: 2
|
513 |
## N-I dash stdout-json: ""
|
514 |
## OK zsh STDOUT:
|
515 |
1
|
516 |
## END
|
517 |
|
518 |
|
519 |
a=(4 5 6)
|
520 |
echo declared
|
521 |
b=$(( a ))
|
522 |
echo $b
|
523 |
|
524 |
## status: 0
|
525 |
## STDOUT:
|
526 |
declared
|
527 |
4
|
528 |
## END
|
529 |
## N-I dash status: 2
|
530 |
## N-I dash stdout-json: ""
|
531 |
## N-I zsh status: 1
|
532 |
## N-I zsh STDOUT:
|
533 |
declared
|
534 |
## END
|
535 |
|
536 |
|
537 |
declare -A A=(['foo']=bar ['spam']=eggs)
|
538 |
echo declared
|
539 |
b=$(( A ))
|
540 |
echo $b
|
541 |
|
542 |
## status: 0
|
543 |
## STDOUT:
|
544 |
declared
|
545 |
0
|
546 |
## END
|
547 |
|
548 |
## N-I mksh status: 1
|
549 |
## N-I mksh stdout-json: ""
|
550 |
|
551 |
|
552 |
## N-I dash status: 2
|
553 |
## N-I dash stdout-json: ""
|
554 |
|
555 |
|
556 |
a=(4 5 6)
|
557 |
|
558 |
# zsh and osh can't evaluate the array like that
|
559 |
# which is consistent with their behavior on $(( a ))
|
560 |
|
561 |
echo $(( a, last = a[2], 42 ))
|
562 |
echo last=$last
|
563 |
|
564 |
## status: 0
|
565 |
## STDOUT:
|
566 |
42
|
567 |
last=6
|
568 |
## END
|
569 |
## N-I dash status: 2
|
570 |
## N-I dash stdout-json: ""
|
571 |
## N-I zsh status: 1
|
572 |
## N-I zsh stdout-json: ""
|
573 |
|
574 |
|
575 |
|
576 |
foo=bar
|
577 |
echo $(( x$foo = 42 ))
|
578 |
echo xbar=$xbar
|
579 |
## STDOUT:
|
580 |
42
|
581 |
xbar=42
|
582 |
## END
|
583 |
|
584 |
|
585 |
foo=bar
|
586 |
echo $(( x$foo[5] = 42 ))
|
587 |
echo 'xbar[5]='${xbar[5]}
|
588 |
## STDOUT:
|
589 |
42
|
590 |
xbar[5]=42
|
591 |
## END
|
592 |
## BUG zsh STDOUT:
|
593 |
42
|
594 |
xbar[5]=
|
595 |
## END
|
596 |
## N-I dash status: 2
|
597 |
## N-I dash stdout-json: ""
|
598 |
|
599 |
|
600 |
foo=bar
|
601 |
xbar=42
|
602 |
echo $(( x$foo++ ))
|
603 |
echo xbar=$xbar
|
604 |
## STDOUT:
|
605 |
42
|
606 |
xbar=43
|
607 |
## END
|
608 |
## BUG dash status: 2
|
609 |
## BUG dash stdout-json: ""
|
610 |
|
611 |
|
612 |
foo=bar
|
613 |
xbar[5]=42
|
614 |
echo $(( x$foo[5]++ ))
|
615 |
echo 'xbar[5]='${xbar[5]}
|
616 |
## STDOUT:
|
617 |
42
|
618 |
xbar[5]=43
|
619 |
## END
|
620 |
## BUG zsh STDOUT:
|
621 |
0
|
622 |
xbar[5]=42
|
623 |
## END
|
624 |
## N-I dash status: 2
|
625 |
## N-I dash stdout-json: ""
|
626 |
|
627 |
|
628 |
e=1+2
|
629 |
echo $(( e + 3 ))
|
630 |
[[ e -eq 3 ]] && echo true
|
631 |
[ e -eq 3 ]
|
632 |
echo status=$?
|
633 |
## STDOUT:
|
634 |
6
|
635 |
true
|
636 |
status=2
|
637 |
## END
|
638 |
## BUG mksh STDOUT:
|
639 |
6
|
640 |
true
|
641 |
status=0
|
642 |
## END
|
643 |
## N-I dash status: 2
|
644 |
## N-I dash stdout-json: ""
|
645 |
|
646 |
|
647 |
a=''
|
648 |
echo $(( a ))
|
649 |
|
650 |
a2=' '
|
651 |
echo $(( a2 ))
|
652 |
## STDOUT:
|
653 |
0
|
654 |
0
|
655 |
## END
|
656 |
|
657 |
|
658 |
echo $((1?2?3:4:5))
|
659 |
## STDOUT:
|
660 |
3
|
661 |
## END
|
662 |
|
663 |
|
664 |
echo $((1 ? a=1 : 42 ))
|
665 |
echo a=$a
|
666 |
|
667 |
# this does NOT work
|
668 |
#echo $((1 ? a=1 : b=2 ))
|
669 |
|
670 |
## STDOUT:
|
671 |
1
|
672 |
a=1
|
673 |
## END
|
674 |
## BUG zsh stdout-json: ""
|
675 |
## BUG zsh status: 1
|
676 |
|
677 |
|
678 |
|
679 |
echo $((a + x42))
|
680 |
echo status=$?
|
681 |
|
682 |
# weird asymmetry -- the above is a syntax error, but this isn't
|
683 |
$SH -c 'echo $((a + 42x))'
|
684 |
echo status=$?
|
685 |
|
686 |
# regression
|
687 |
echo $((a + 42x))
|
688 |
echo status=$?
|
689 |
## status: 1
|
690 |
## STDOUT:
|
691 |
0
|
692 |
status=0
|
693 |
status=1
|
694 |
## END
|
695 |
## OK dash status: 2
|
696 |
## OK dash STDOUT:
|
697 |
0
|
698 |
status=0
|
699 |
status=2
|
700 |
## END
|
701 |
## BUG bash status: 0
|
702 |
## BUG bash STDOUT:
|
703 |
0
|
704 |
status=0
|
705 |
status=1
|
706 |
status=1
|
707 |
## END
|
708 |
|
709 |
|
710 |
|
711 |
echo $(( 10 / 3))
|
712 |
echo $((-10 / 3))
|
713 |
echo $(( 10 / -3))
|
714 |
echo $((-10 / -3))
|
715 |
|
716 |
echo ---
|
717 |
|
718 |
a=20
|
719 |
: $(( a /= 3 ))
|
720 |
echo $a
|
721 |
|
722 |
a=-20
|
723 |
: $(( a /= 3 ))
|
724 |
echo $a
|
725 |
|
726 |
a=20
|
727 |
: $(( a /= -3 ))
|
728 |
echo $a
|
729 |
|
730 |
a=-20
|
731 |
: $(( a /= -3 ))
|
732 |
echo $a
|
733 |
|
734 |
## STDOUT:
|
735 |
3
|
736 |
-3
|
737 |
-3
|
738 |
3
|
739 |
---
|
740 |
6
|
741 |
-6
|
742 |
-6
|
743 |
6
|
744 |
## END
|
745 |
|
746 |
|
747 |
|
748 |
echo $(( 10 % 3))
|
749 |
echo $((-10 % 3))
|
750 |
echo $(( 10 % -3))
|
751 |
echo $((-10 % -3))
|
752 |
|
753 |
# Algorithm: Make both number spositive, then take the sign of the first
|
754 |
# number?
|
755 |
|
756 |
## STDOUT:
|
757 |
1
|
758 |
-1
|
759 |
1
|
760 |
-1
|
761 |
## END
|
762 |
|
763 |
|
764 |
case $SH in dash) exit ;; esac
|
765 |
|
766 |
echo ARITH $(( undef[0] ))
|
767 |
echo status=$?
|
768 |
echo
|
769 |
|
770 |
(( undef[0] ))
|
771 |
echo status=$?
|
772 |
echo
|
773 |
|
774 |
echo UNDEF ${undef[0]}
|
775 |
echo status=$?
|
776 |
|
777 |
## STDOUT:
|
778 |
ARITH 0
|
779 |
status=0
|
780 |
|
781 |
status=1
|
782 |
|
783 |
UNDEF
|
784 |
status=0
|
785 |
## END
|
786 |
## N-I dash STDOUT:
|
787 |
## END
|
788 |
|
789 |
|
790 |
case $SH in dash) exit ;; esac
|
791 |
|
792 |
set -o nounset
|
793 |
echo UNSET $(( undef[0] ))
|
794 |
echo status=$?
|
795 |
|
796 |
## status: 1
|
797 |
## STDOUT:
|
798 |
## END
|
799 |
|
800 |
## N-I dash status: 0
|
801 |
|
802 |
## BUG mksh/zsh status: 0
|
803 |
## BUG mksh/zsh STDOUT:
|
804 |
UNSET 0
|
805 |
status=0
|
806 |
## END
|
807 |
|
808 |
## N-I dash STDOUT:
|
809 |
## END
|
810 |
|
811 |
|
812 |
case $SH in dash) exit ;; esac
|
813 |
|
814 |
s='abc'
|
815 |
echo abc $(( s[0] )) $(( s[1] ))
|
816 |
echo status=$?
|
817 |
echo
|
818 |
|
819 |
(( s[0] ))
|
820 |
echo status=$?
|
821 |
echo
|
822 |
|
823 |
## STDOUT:
|
824 |
abc 0 0
|
825 |
status=0
|
826 |
|
827 |
status=1
|
828 |
|
829 |
## END
|
830 |
## N-I dash STDOUT:
|
831 |
## END
|
832 |
|
833 |
|
834 |
case $SH in dash) exit ;; esac
|
835 |
|
836 |
s='42'
|
837 |
echo 42 $(( s[0] )) $(( s[1] ))
|
838 |
echo status=$?
|
839 |
|
840 |
## STDOUT:
|
841 |
42 42 0
|
842 |
status=0
|
843 |
## END
|
844 |
## N-I dash STDOUT:
|
845 |
## END
|
846 |
|
847 |
## BUG zsh STDOUT:
|
848 |
42 0 4
|
849 |
status=0
|
850 |
## END
|
851 |
|
852 |
|
853 |
|
854 |
s='12 34'
|
855 |
echo '12 34' $(( s[0] )) $(( s[1] ))
|
856 |
echo status=$?
|
857 |
|
858 |
## status: 1
|
859 |
## STDOUT:
|
860 |
## END
|
861 |
|
862 |
## OK dash status: 2
|
863 |
|
864 |
## BUG zsh status: 0
|
865 |
## BUG zsh STDOUT:
|
866 |
12 34 0 1
|
867 |
status=0
|
868 |
## END
|
869 |
|
870 |
# bash prints an error, but doesn't fail
|
871 |
|
872 |
## BUG bash status: 0
|
873 |
## BUG bash STDOUT:
|
874 |
status=1
|
875 |
## END
|