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testsuite: pgrep: Provide test for matching a more than 4k command line; beware as TCL does not seem to match on strings >4k

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This commit is contained in:
Clay Baenziger 2019-08-03 05:58:18 -04:00 committed by Craig Small
parent 61b627d53c
commit e516cf4a18
2 changed files with 18 additions and 7 deletions
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17
testsuite/config/unix.exp
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@ -118,7 +118,7 @@ proc expect_table_dsc { test match_header match_item } {
}
proc make_testproc { } {
global testproc_path testproc_comm testproc1_pid testproc2_pid topdir
global testproc_path testproc_comm testproc_arg_str testproc1_pid testproc2_pid topdir
set testproc_realpath "${topdir}/lib/test_process"
set testproc_comm "spcorp"
@ -133,8 +133,19 @@ proc make_testproc { } {
eof { perror "test proc does not link to test process" }
}
set testproc1_pid [ exec $testproc_path & ]
# make a process with the argument set to a fraction of ARG_MAX length
# but small enough we do not run TCL out of memory for regular expressions
# nor do we get argument list too long (104857 was found to work on Ubuntu 18.04)
set max_arg_len [ expr min([ exec /usr/bin/getconf ARG_MAX ], 104857) ]
# ensure we have enough slack to launch the test prog and pgrep
set reserved_space [expr max([ string length $testproc_path ], [ string length $topdir ] + 10)]
set testproc_arg_str "a"
set i $reserved_space
while {$i<$max_arg_len} {
incr i
append testproc_arg_str "a"
}
set testproc1_pid [ exec $testproc_path $testproc_arg_str & ]
set testproc2_pid [ exec $testproc_path & ]
}

8
testsuite/pgrep.test/pgrep.exp
View File

@ -34,9 +34,9 @@ set test "pgrep with : delimiter"
spawn $pgrep -d : $testproc_comm
expect_pass "$test" "^${testproc1_pid}:${testproc2_pid}\\s*$"
# FIXME - Need to test against -f flag
set test "pgrep match against full process name"
untested $test
spawn $pgrep -f "$testproc_path\\s+$testproc_arg_str"
expect_pass "$test" "^$testproc1_pid\\s*$"
set test "pgrep with matching gid"
spawn $pgrep -G $gid $testproc_comm
@ -51,8 +51,8 @@ spawn $pgrep -l $testproc_comm
expect_pass "$test" "^$testproc1_pid\\s+$testproc_comm\\s+$testproc2_pid\\s+$testproc_comm\\s*$"
set test "pgrep with full command line"
spawn $pgrep -a $testproc_comm
expect_pass "$test" "^$testproc1_pid\\s+$testproc_path\\s+$testproc2_pid\\s+$testproc_path\\s*$"
spawn $pgrep -af "$testproc_path$"
expect_pass "$test" "^$testproc2_pid\\s+$testproc_path\\s*$"
set test "pgrep find newest test pid"
spawn $pgrep -n $testproc_comm