1 |
|
2 |
#### implicit for loop |
3 |
# This is like "for i in $@". |
4 |
fun() { |
5 |
for i; do |
6 |
echo $i |
7 |
done |
8 |
} |
9 |
fun 1 2 3 |
10 |
## STDOUT: |
11 |
1 |
12 |
2 |
13 |
3 |
14 |
## END |
15 |
|
16 |
#### empty for loop (has "in") |
17 |
set -- 1 2 3 |
18 |
for i in ; do |
19 |
echo $i |
20 |
done |
21 |
## stdout-json: "" |
22 |
|
23 |
#### for loop with invalid identifier |
24 |
# should be compile time error, but runtime error is OK too |
25 |
for - in a b c; do |
26 |
echo hi |
27 |
done |
28 |
## stdout-json: "" |
29 |
## status: 2 |
30 |
## OK bash/mksh status: 1 |
31 |
## BUG zsh stdout: hi |
32 |
## BUG zsh status: 1 |
33 |
|
34 |
#### Tilde expansion within for loop |
35 |
HOME=/home/bob |
36 |
for name in ~/src ~/git; do |
37 |
echo $name |
38 |
done |
39 |
## STDOUT: |
40 |
/home/bob/src |
41 |
/home/bob/git |
42 |
## END |
43 |
|
44 |
#### Brace Expansion within Array |
45 |
for i in -{a,b} {c,d}-; do |
46 |
echo $i |
47 |
done |
48 |
## STDOUT: |
49 |
-a |
50 |
-b |
51 |
c- |
52 |
d- |
53 |
## END |
54 |
## N-I dash STDOUT: |
55 |
-{a,b} |
56 |
{c,d}- |
57 |
## END |
58 |
|
59 |
#### using loop var outside loop |
60 |
fun() { |
61 |
for i in a b c; do |
62 |
echo $i |
63 |
done |
64 |
echo $i |
65 |
} |
66 |
fun |
67 |
## status: 0 |
68 |
## STDOUT: |
69 |
a |
70 |
b |
71 |
c |
72 |
c |
73 |
## END |
74 |
|
75 |
#### continue |
76 |
for i in a b c; do |
77 |
echo $i |
78 |
if test $i = b; then |
79 |
continue |
80 |
fi |
81 |
echo $i |
82 |
done |
83 |
## status: 0 |
84 |
## STDOUT: |
85 |
a |
86 |
a |
87 |
b |
88 |
c |
89 |
c |
90 |
## END |
91 |
|
92 |
#### break |
93 |
for i in a b c; do |
94 |
echo $i |
95 |
if test $i = b; then |
96 |
break |
97 |
fi |
98 |
done |
99 |
## status: 0 |
100 |
## STDOUT: |
101 |
a |
102 |
b |
103 |
## END |
104 |
|
105 |
#### dynamic control flow (KNOWN INCOMPATIBILITY) |
106 |
# hm would it be saner to make FATAL builtins called break/continue/etc.? |
107 |
# On the other hand, this spits out errors loudly. |
108 |
b=break |
109 |
for i in 1 2 3; do |
110 |
echo $i |
111 |
$b |
112 |
done |
113 |
## STDOUT: |
114 |
1 |
115 |
## END |
116 |
## OK osh STDOUT: |
117 |
1 |
118 |
2 |
119 |
3 |
120 |
## END |
121 |
## OK osh status: 127 |
122 |
|
123 |
#### while in while condition |
124 |
# This is a consequence of the grammar |
125 |
while while true; do echo cond; break; done |
126 |
do |
127 |
echo body |
128 |
break |
129 |
done |
130 |
## STDOUT: |
131 |
cond |
132 |
body |
133 |
## END |
134 |
|
135 |
#### while in pipe |
136 |
x=$(find spec/ | wc -l) |
137 |
y=$(find spec/ | while read path; do |
138 |
echo $path |
139 |
done | wc -l |
140 |
) |
141 |
test $x -eq $y |
142 |
echo status=$? |
143 |
## stdout: status=0 |
144 |
|
145 |
#### while in pipe with subshell |
146 |
i=0 |
147 |
seq 3 | ( while read foo; do |
148 |
i=$((i+1)) |
149 |
#echo $i |
150 |
done |
151 |
echo $i ) |
152 |
## stdout: 3 |
153 |
|
154 |
#### until loop |
155 |
# This is just the opposite of while? while ! cond? |
156 |
until false; do |
157 |
echo hi |
158 |
break |
159 |
done |
160 |
## stdout: hi |
161 |
|
162 |
#### continue at top level |
163 |
if true; then |
164 |
echo one |
165 |
continue |
166 |
echo two |
167 |
fi |
168 |
## status: 0 |
169 |
## STDOUT: |
170 |
one |
171 |
two |
172 |
## END |
173 |
# zsh behaves like strict_control_flow! |
174 |
## OK zsh status: 1 |
175 |
## OK zsh STDOUT: |
176 |
one |
177 |
## END |
178 |
|
179 |
#### continue in subshell |
180 |
for i in $(seq 2); do |
181 |
echo "> $i" |
182 |
( if true; then continue; fi; echo "Should not print" ) |
183 |
echo subshell status=$? |
184 |
echo ". $i" |
185 |
done |
186 |
## STDOUT: |
187 |
# osh lets you fail |
188 |
> 1 |
189 |
subshell status=1 |
190 |
. 1 |
191 |
> 2 |
192 |
subshell status=1 |
193 |
. 2 |
194 |
## END |
195 |
## OK dash/bash/zsh STDOUT: |
196 |
> 1 |
197 |
subshell status=0 |
198 |
. 1 |
199 |
> 2 |
200 |
subshell status=0 |
201 |
. 2 |
202 |
## END |
203 |
## BUG mksh STDOUT: |
204 |
> 1 |
205 |
Should not print |
206 |
subshell status=0 |
207 |
. 1 |
208 |
> 2 |
209 |
Should not print |
210 |
subshell status=0 |
211 |
. 2 |
212 |
## END |
213 |
|
214 |
#### continue in subshell aborts with errexit |
215 |
# The other shells don't let you recover from this programming error! |
216 |
set -o errexit |
217 |
for i in $(seq 2); do |
218 |
echo "> $i" |
219 |
( if true; then continue; fi; echo "Should not print" ) |
220 |
echo 'should fail after subshell' |
221 |
echo ". $i" |
222 |
done |
223 |
## STDOUT: |
224 |
> 1 |
225 |
## END |
226 |
## status: 1 |
227 |
## BUG dash/bash/zsh STDOUT: |
228 |
> 1 |
229 |
should fail after subshell |
230 |
. 1 |
231 |
> 2 |
232 |
should fail after subshell |
233 |
. 2 |
234 |
## END |
235 |
## BUG dash/bash/zsh status: 0 |
236 |
## BUG mksh STDOUT: |
237 |
> 1 |
238 |
Should not print |
239 |
should fail after subshell |
240 |
. 1 |
241 |
> 2 |
242 |
Should not print |
243 |
should fail after subshell |
244 |
. 2 |
245 |
## END |
246 |
## BUG mksh status: 0 |
247 |
|
248 |
#### bad arg to break |
249 |
x=oops |
250 |
while true; do |
251 |
echo hi |
252 |
break $x |
253 |
sleep 0.1 |
254 |
done |
255 |
## stdout: hi |
256 |
## status: 1 |
257 |
## OK dash status: 2 |
258 |
## OK bash status: 128 |
259 |
|
260 |
#### too many args to continue |
261 |
# OSH treats this as a parse error |
262 |
for x in a b c; do |
263 |
echo $x |
264 |
# bash breaks rather than continue or fatal error!!! |
265 |
continue 1 2 3 |
266 |
done |
267 |
echo -- |
268 |
## stdout-json: "" |
269 |
## status: 2 |
270 |
## BUG bash STDOUT: |
271 |
a |
272 |
-- |
273 |
## END |
274 |
## OK bash status: 0 |
275 |
## BUG dash/mksh/zsh STDOUT: |
276 |
a |
277 |
b |
278 |
c |
279 |
-- |
280 |
## END |
281 |
## BUG dash/mksh/zsh status: 0 |
282 |
|
283 |
#### break in condition of loop |
284 |
while break; do |
285 |
echo x |
286 |
done |
287 |
echo done |
288 |
## STDOUT: |
289 |
done |
290 |
## END |
291 |
|
292 |
|
293 |
#### break in condition of nested loop |
294 |
for i in 1 2 3; do |
295 |
echo i=$i |
296 |
while break; do |
297 |
echo x |
298 |
done |
299 |
done |
300 |
echo done |
301 |
## STDOUT: |
302 |
i=1 |
303 |
i=2 |
304 |
i=3 |
305 |
done |
306 |
## END |
307 |
|
308 |
#### return within eval |
309 |
f() { |
310 |
echo one |
311 |
eval 'return' |
312 |
echo two |
313 |
} |
314 |
f |
315 |
## STDOUT: |
316 |
one |
317 |
## END |
318 |
|
319 |
#### break/continue within eval |
320 |
# NOTE: This changes things |
321 |
# set -e |
322 |
f() { |
323 |
for i in $(seq 5); do |
324 |
if test $i = 2; then |
325 |
eval continue |
326 |
fi |
327 |
if test $i = 4; then |
328 |
eval break |
329 |
fi |
330 |
echo $i |
331 |
done |
332 |
|
333 |
eval 'return' |
334 |
echo 'done' |
335 |
} |
336 |
f |
337 |
## STDOUT: |
338 |
1 |
339 |
3 |
340 |
## END |
341 |
## BUG mksh STDOUT: |
342 |
1 |
343 |
2 |
344 |
3 |
345 |
4 |
346 |
5 |
347 |
## END |
348 |
|
349 |
#### break/continue within source |
350 |
# NOTE: This changes things |
351 |
# set -e |
352 |
|
353 |
cd $REPO_ROOT |
354 |
f() { |
355 |
for i in $(seq 5); do |
356 |
if test $i = 2; then |
357 |
. spec/testdata/continue.sh |
358 |
fi |
359 |
if test $i = 4; then |
360 |
. spec/testdata/break.sh |
361 |
fi |
362 |
echo $i |
363 |
done |
364 |
|
365 |
# Return is different! |
366 |
. spec/testdata/return.sh |
367 |
echo done |
368 |
} |
369 |
f |
370 |
## STDOUT: |
371 |
1 |
372 |
3 |
373 |
done |
374 |
## END |
375 |
## BUG zsh/mksh STDOUT: |
376 |
1 |
377 |
2 |
378 |
3 |
379 |
4 |
380 |
5 |
381 |
done |
382 |
## END |
383 |
|
384 |
#### top-level break/continue/return (without strict_control_flow) |
385 |
$SH -c 'break; echo break=$?' |
386 |
$SH -c 'continue; echo continue=$?' |
387 |
$SH -c 'return; echo return=$?' |
388 |
## STDOUT: |
389 |
break=0 |
390 |
continue=0 |
391 |
## END |
392 |
## BUG zsh stdout-json: "" |
393 |
## BUG bash STDOUT: |
394 |
break=0 |
395 |
continue=0 |
396 |
return=1 |
397 |
## END |