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hush: getopts builtin

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function                                             old     new   delta
builtin_getopts                                        -     271    +271
bltins1                                              372     384     +12
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(add/remove: 1/0 grow/shrink: 1/0 up/down: 283/0)             Total: 283 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2017-08-11 01:32:46 +02:00
parent 4628945cd8
commit 74d4058928
7 changed files with 212 additions and 2 deletions
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6
shell/hush_test/hush-getopts/getopt_positional.right Normal file
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*** no OPTIND, optstring:'we' args:-q -w -e r -t -y
./getopt_positional.tests: invalid option -- q
var:'?' OPTIND:2
var:'w' OPTIND:3
var:'e' OPTIND:4
exited: var:'?' OPTIND:4

8
shell/hush_test/hush-getopts/getopt_positional.tests Executable file
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set -- -q -w -e r -t -y
echo "*** no OPTIND, optstring:'we' args:$*"
var=QWERTY
while getopts "we" var; do
echo "var:'$var' OPTIND:$OPTIND"
done
# unfortunately, "rc:0" is shown since while's overall exitcode is "success"
echo "exited: var:'$var' OPTIND:$OPTIND"

34
shell/hush_test/hush-getopts/getopt_simple.right Normal file
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*** no OPTIND, optstring:'ab' args:-a -b c
var:'a' OPTIND:2
var:'b' OPTIND:3
exited: rc:0 var:'?' OPTIND:3
*** OPTIND=1, optstring:'ab' args:-a -b c
var:'a' OPTIND:2
var:'b' OPTIND:3
exited: rc:0 var:'?' OPTIND:3
*** OPTIND=0, optstring:'ab' args:-a -b c
var:'a' OPTIND:2
var:'b' OPTIND:3
exited: rc:0 var:'?' OPTIND:3
*** unset OPTIND, optstring:'ab' args:-a -b c
var:'a' OPTIND:2
var:'b' OPTIND:3
exited: rc:0 var:'?' OPTIND:3
*** optstring:'ab' args:-a -b c
1 rc:0 var:'a' OPTIND:2
2 rc:0 var:'b' OPTIND:3
3 rc:1 var:'?' OPTIND:3
*** unset OPTIND, optstring:'ab' args:-a c -c -b d
var:'a' OPTIND:2
exited: rc:0 var:'?' OPTIND:2
*** unset OPTIND, optstring:'ab' args:-a -c -b d
var:'a' OPTIND:2
./getopt_simple.tests: invalid option -- c
var:'?' OPTIND:3
var:'b' OPTIND:4
exited: rc:0 var:'?' OPTIND:4
*** unset OPTIND, OPTERR=0, optstring:'ab' args:-a -c -b d
var:'a' OPTIND:2
var:'?' OPTIND:3
var:'b' OPTIND:4
exited: rc:0 var:'?' OPTIND:4

75
shell/hush_test/hush-getopts/getopt_simple.tests Executable file
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# Simple usage cases for getopts.
#
# OPTIND is either not touched at all (first loop with getopts,
# relying on shell startup init), or getopts state is reset
# before new loop with "unset OPTIND", "OPTIND=1" or "OPTIND=0".
#
# Each option is a separate argument (no "-abc"). This conceptually
# needs only $OPTIND to hold getopts state.
#
# We check that loop does not stop on unknown option (sets "?"),
# stops on _first_ non-option argument.
echo "*** no OPTIND, optstring:'ab' args:-a -b c"
var=QWERTY
while getopts "ab" var -a -b c; do
echo "var:'$var' OPTIND:$OPTIND"
done
# unfortunately, "rc:0" is shown since while's overall exitcode is "success"
echo "exited: rc:$? var:'$var' OPTIND:$OPTIND"
# Resetting behavior =1
echo "*** OPTIND=1, optstring:'ab' args:-a -b c"
OPTIND=1
while getopts "ab" var -a -b c; do
echo "var:'$var' OPTIND:$OPTIND"
done
echo "exited: rc:$? var:'$var' OPTIND:$OPTIND"
# Resetting behavior =0
echo "*** OPTIND=0, optstring:'ab' args:-a -b c"
OPTIND=0
while getopts "ab" var -a -b c; do
echo "var:'$var' OPTIND:$OPTIND"
done
echo "exited: rc:$? var:'$var' OPTIND:$OPTIND"
# Resetting behavior "unset"
echo "*** unset OPTIND, optstring:'ab' args:-a -b c"
unset OPTIND
while getopts "ab" var -a -b c; do
echo "var:'$var' OPTIND:$OPTIND"
done
echo "exited: rc:$? var:'$var' OPTIND:$OPTIND"
# What is the final exitcode?
echo "*** optstring:'ab' args:-a -b c"
unset OPTIND
getopts "ab" var -a -b c; echo "1 rc:$? var:'$var' OPTIND:$OPTIND"
getopts "ab" var -a -b c; echo "2 rc:$? var:'$var' OPTIND:$OPTIND"
getopts "ab" var -a -b c; echo "3 rc:$? var:'$var' OPTIND:$OPTIND"
# Where would it stop? c or -c?
echo "*** unset OPTIND, optstring:'ab' args:-a c -c -b d"
unset OPTIND
while getopts "ab" var -a c -c -b d; do
echo "var:'$var' OPTIND:$OPTIND"
done
echo "exited: rc:$? var:'$var' OPTIND:$OPTIND"
# What happens on unknown option?
echo "*** unset OPTIND, optstring:'ab' args:-a -c -b d"
unset OPTIND
while getopts "ab" var -a -c -b d; do
echo "var:'$var' OPTIND:$OPTIND"
done
echo "exited: rc:$? var:'$var' OPTIND:$OPTIND"
# ORTERR=0 suppresses error message?
echo "*** unset OPTIND, OPTERR=0, optstring:'ab' args:-a -c -b d"
unset OPTIND
OPTERR=0
while getopts "ab" var -a -c -b d; do
echo "var:'$var' OPTIND:$OPTIND"
done
echo "exited: rc:$? var:'$var' OPTIND:$OPTIND"