xref: /titanic_51/usr/src/lib/libshell/common/tests/sigchld.sh (revision 36e852a172cba914383d7341c988128b2c667fbd) 
1########################################################################
2#                                                                      #
3#               This software is part of the ast package               #
4#          Copyright (c) 1982-2009 AT&T Intellectual Property          #
5#                      and is licensed under the                       #
6#                  Common Public License, Version 1.0                  #
7#                    by AT&T Intellectual Property                     #
8#                                                                      #
9#                A copy of the License is available at                 #
10#            http://www.opensource.org/licenses/cpl1.0.txt             #
11#         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         #
12#                                                                      #
13#              Information and Software Systems Research               #
14#                            AT&T Research                             #
15#                           Florham Park NJ                            #
16#                                                                      #
17#                  David Korn <dgk@research.att.com>                   #
18#                                                                      #
19########################################################################
20function err_exit
21{
22	print -u2 -n "\t"
23	print -u2 -r ${Command}[$1]: "${@:2}"
24	(( Errors+=1 ))
25}
26
27alias err_exit='err_exit $LINENO'
28
29float DELAY=${1:-0.5}
30integer FOREGROUND=10 BACKGROUND=2 Errors=0
31
32s=$($SHELL -c '
33integer i foreground=0 background=0
34float delay='$DELAY' d=0 s=0
35
36set --errexit
37
38trap "(( background++ ))" CHLD
39
40(( d = delay ))
41for ((i = 0; i < '$BACKGROUND'; i++))
42do	sleep $d &
43	(( d *= 4 ))
44	(( s += d ))
45done
46for ((i = 0; i < '$FOREGROUND'; i++))
47do	(( foreground++ ))
48	sleep $delay
49	(( s -= delay ))
50	$SHELL -c : > /dev/null # foreground does not generate SIGCHLD
51done
52if	(( (s += delay) < 1 ))
53then	(( s = 1 ))
54fi
55sleep $s
56wait
57print foreground=$foreground background=$background
58') || err_exit "test loop failed"
59
60eval $s
61
62(( foreground == FOREGROUND )) || err_exit "expected '$FOREGROUND foreground' -- got '$foreground' (DELAY=$DELAY)"
63(( background == BACKGROUND )) || err_exit "expected '$BACKGROUND background' -- got '$background' (DELAY=$DELAY)"
64
65set --noerrexit
66
67if	[[ ${.sh.version} == Version?*([[:upper:]])J* ]]
68then
69
70	jobmax=4
71	got=$($SHELL -c '
72		JOBMAX='$jobmax' JOBCOUNT=$(('$jobmax'*2))
73		integer running=0 maxrunning=0
74		trap "((running--))" CHLD
75		for ((i=0; i<JOBCOUNT; i++))
76		do	sleep 1 &
77			if	((++running > maxrunning))
78			then	((maxrunning=running))
79			fi
80		done
81		wait
82		print running=$running maxrunning=$maxrunning
83	')
84	exp='running=0 maxrunning='$jobmax
85	[[ $got == $exp ]] || err_exit "SIGCHLD trap queueing failed -- expected '$exp', got '$got'"
86
87	got=$($SHELL -c '
88		typeset -A proc
89
90		trap "
91			print \${proc[\$!].name} \${proc[\$!].status} \$?
92			unset proc[\$!]
93		" CHLD
94
95		{ sleep 3; print a; exit 1; } &
96		proc[$!]=( name=a status=1 )
97
98		{ sleep 2; print b; exit 2; } &
99		proc[$!]=( name=b status=2 )
100
101		{ sleep 1; print c; exit 3; } &
102		proc[$!]=( name=c status=3 )
103
104		while	(( ${#proc[@]} ))
105		do	sleep -s
106		done
107	')
108	exp='c\nc 3 3\nb\nb 2 2\na\na 1 1'
109	[[ $got == $exp ]] || err_exit "SIGCHLD trap queueing failed -- expected $(printf %q "$exp"), got $(printf %q "$got")"
110
111fi
112
113exit $((Errors))
114