xref: /titanic_52/usr/src/cmd/ast/libshell/common/tests/sun_solaris_cr_6753538_subshell_leaks_umask.sh (revision 906afcb89d0412cc073b95c2d701a804a8cdb62c) 
1#
2# CDDL HEADER START
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4# The contents of this file are subject to the terms of the
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10# See the License for the specific language governing permissions
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19# CDDL HEADER END
20#
21
22#
23# Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
24#
25
26#
27# Test whether CR #6753538 ("umask modification leaks out of a ksh93
28# subshell") has been fixed.
29#
30# Quote from CR #6753538:
31# -- snip --
32# I discovered that Solaris 11's /bin/sh exhibits the following
33# surprising behavior:
34#
35#    $ /bin/sh -c 'umask 22; (umask 0); umask'
36#    0000
37#
38# All other shells I tried print 22.
39# -- snip --
40
41
42# test setup
43function err_exit
44{
45	print -u2 -n "\t"
46	print -u2 -r ${Command}[$1]: "${@:2}"
47	(( Errors < 127 && Errors++ ))
48}
49alias err_exit='err_exit $LINENO'
50
51set -o nounset
52Command=${0##*/}
53integer Errors=0
54
55
56#
57# test set 1: Simple umask in subshell
58#
59x=$(${SHELL} -c 'umask 22; (umask  0); umask')
60[[ "$x" == "0022" ]] || err_exit "expected umask 0022, got $x"
61
62x=$(${SHELL} -c 'umask 20; (umask  0); umask')
63[[ "$x" == "0020" ]] || err_exit "expected umask 0020, got $x"
64
65x=$(${SHELL} -c 'umask  0; (umask 22); umask')
66[[ "$x" == "0000" ]] || err_exit "expected umask 0000, got $x"
67
68
69#
70# test set 2: Simple umask in two subshells
71#
72x=$(${SHELL} -c 'umask 22; ( (umask 10); umask  0); umask')
73[[ "$x" == "0022" ]] || err_exit "expected umask 0022, got $x"
74
75x=$(${SHELL} -c 'umask 20; ( (umask 10); umask 0); umask')
76[[ "$x" == "0020" ]] || err_exit "expected umas k 0020, got $x"
77
78x=$(${SHELL} -c 'umask  0; ( (umask 10); umask 22); umask')
79[[ "$x" == "0000" ]] || err_exit "expected umask 0000, got $x"
80
81
82#
83# test set 3: Compare normal subshell vs. subshell in seperate process
84# ($ ulimit -c 0 # forced the subshell to |fork()|
85#
86x=$(${SHELL} -c 'umask 22; (              umask  0); umask') || err_exit "shell failed."
87y=$(${SHELL} -c 'umask 22; (ulimit -c 0 ; umask  0); umask') || err_exit "shell failed."
88[[ "$x" == "$y" ]] || err_exit "$x != $y"
89
90x=$(${SHELL} -c 'umask 20; (              umask  0); umask') || err_exit "shell failed."
91y=$(${SHELL} -c 'umask 20; (ulimit -c 0 ; umask  0); umask') || err_exit "shell failed."
92[[ "$x" == "$y" ]] || err_exit "$x != $y"
93
94x=$(${SHELL} -c 'umask  0; (              umask 20); umask') || err_exit "shell failed."
95y=$(${SHELL} -c 'umask  0; (ulimit -c 0 ; umask 20); umask') || err_exit "shell failed."
96[[ "$x" == "$y" ]] || err_exit "$x != $y"
97
98
99# tests done
100exit $((Errors))
101