# Commands covered:  exec
#
# This file contains a collection of tests for one or more of the Tcl built-in
# commands. Sourcing this file into Tcl runs the tests and generates output
# for errors. No output means no errors were found.
#
# Copyright © 1991-1994 The Regents of the University of California.
# Copyright © 1994-1997 Sun Microsystems, Inc.
# Copyright © 1998-1999 Scriptics Corporation.
#
# See the file "license.terms" for information on usage and redistribution of
# this file, and for a DISCLAIMER OF ALL WARRANTIES.

# There is no point in running Valgrind on cases where [exec] forks but then
# fails and the child process doesn't go through full cleanup.

if {"::tcltest" ni [namespace children]} {
    package require tcltest 2.5
    namespace import -force ::tcltest::*
}
source [file join [file dirname [info script]] tcltests.tcl]

# Some skips when running in a macOS CI environment
testConstraint noosxCI [expr {![info exists ::env(MAC_CI)]}]

# Need a App Exec Alias for testing exec of reparse points,
# according to MS, winget can only be used on servers with an installed desktop interface,
# no idea how to check it in GHA programmatically, so simply disable it (todo: rewrite with better check later)
if {[testConstraint win] && ![info exists ::env(CI)] &&
    [info exists ::env(LOCALAPPDATA)]} {
    set wingetPath [file join $::env(LOCALAPPDATA) "Microsoft" "WindowsApps" "winget.exe"]
    if {[file exists $wingetPath]} {
	# Ensure it is on the PATH
	testConstraint haveWinget 1
    }
}

testConstraint testhandlecount [expr {[llength [info commands testhandlecount]] != 0}]

unset -nocomplain path

# Utilities that are like Bourne shell stalwarts, but cross-platform.
set path(echo) [makeFile {
    puts -nonewline [lindex $argv 0]
    foreach str [lrange $argv 1 end] {
	puts -nonewline " $str"
    }
    puts {}
    exit
} echo]
set path(echo2) [makeFile {
    puts stdout [join $argv]
    puts stderr [lindex $argv 1]
    exit
} echo2]
set path(echobin) [makeFile {
    fconfigure stdout -translation binary
    puts -nonewline [binary decode hex [join $argv ""]]
    exit
} echobin]
set path(cat) [makeFile {
    if {$argv eq ""} {
	set argv -
    }
    fconfigure stdout -translation binary
    foreach name $argv {
	if {$name eq "-"} {
	    set f stdin
	} elseif {[catch {open $name r} f] != 0} {
	    puts stderr $f
	    continue
	}
	fconfigure $f -translation binary
	while {[eof $f] == 0} {
	    puts -nonewline [read $f]
	}
	if {$f ne "stdin"} {
	    close $f
	}
    }
    exit
} cat]
set path(wc) [makeFile {
    set data [read stdin]
    set lines [regsub -all "\n" $data {} dummy]
    set words [regsub -all "\[^ \t\n]+" $data {} dummy]
    set chars [string length $data]
    puts [format "%8.d%8.d%8.d" $lines $words $chars]
    exit
} wc]
set path(sh) [makeFile {
    if {[lindex $argv 0] ne "-c"} {
	error "sh: unexpected arguments $argv"
    }
    set cmd [lindex $argv 1]
    lappend cmd ";"
    set newcmd {}
    foreach arg $cmd {
	if {$arg eq ";"} {
	    exec >@stdout 2>@stderr [info nameofexecutable] {*}$newcmd
	    set newcmd {}
	    continue
	}
	if {$arg eq "1>&2"} {
	    set arg >@stderr
	}
	lappend newcmd $arg
    }
    exit
} sh]
set path(sh2) [makeFile {
    if {[lindex $argv 0] ne "-c"} {
	error "sh: unexpected arguments $argv"
    }
    set cmd [lindex $argv 1]
    lappend cmd ";"
    set newcmd {}
    foreach arg $cmd {
	if {$arg eq ";"} {
	    exec -ignorestderr >@stdout [info nameofexecutable] {*}$newcmd
	    set newcmd {}
	    continue
	}
	lappend newcmd $arg
    }
    exit
} sh2]
set path(sleep) [makeFile {
    after [expr {$argv*1000}]
    exit
} sleep]
set path(exit) [makeFile {
    exit $argv
} exit]

proc readfile filename {
    set f [open $filename]
    set d [read $f]
    close $f
    return [string trimright $d \n]
}

# ----------------------------------------------------------------------
# Basic operations.

test exec-1.1 {basic exec operation} {exec} {
    exec [interpreter] $path(echo) a b c
} "a b c"
test exec-1.2 {pipelining} {exec stdio} {
    exec [interpreter] $path(echo) a b c d | [interpreter] $path(cat) | [interpreter] $path(cat)
} "a b c d"
test exec-1.3 {pipelining} {exec stdio} {
    set a [exec [interpreter] $path(echo) a b c d | [interpreter] $path(cat) | [interpreter] $path(wc)]
    list [scan $a "%d %d %d" b c d] $b $c
} {3 1 4}
set arg {12345678901234567890123456789012345678901234567890}
set arg "$arg$arg$arg$arg$arg$arg"
test exec-1.4 {long command lines} {exec} {
    exec [interpreter] $path(echo) $arg
} $arg
set arg {}
test exec-1.5 {pipelining - handle leaks} -constraints {exec stdio testhandlecount} -body {
    set numHandles [testhandlecount]
    set a [exec [interpreter] $path(echo) a b c d | [interpreter] $path(cat) | [interpreter] $path(wc)]
    list [scan $a "%d %d %d" b c d] $b $c [expr {[testhandlecount] - $numHandles}]
} -result {3 1 4 0}


# I/O redirection: input from Tcl command.

test exec-2.1 {redirecting input from immediate source} {exec stdio} {
    exec [interpreter] $path(cat) << "Sample text"
} {Sample text}
test exec-2.2 {redirecting input from immediate source} {exec stdio} {
    exec << "Sample text" [interpreter] $path(cat) | [interpreter] $path(cat)
} {Sample text}
test exec-2.3 {redirecting input from immediate source} {exec stdio} {
    exec [interpreter] $path(cat) << "Sample text" | [interpreter] $path(cat)
} {Sample text}
test exec-2.4 {redirecting input from immediate source} {exec stdio} {
    exec [interpreter] $path(cat) | [interpreter] $path(cat) << "Sample text"
} {Sample text}
test exec-2.5 {redirecting input from immediate source} {exec} {
    exec [interpreter] $path(cat) "<<Joined to arrows"
} {Joined to arrows}
test exec-2.6 {redirecting input from immediate source, with UTF} -setup {
    set sysenc [encoding system]
    encoding system iso8859-1
    proc quotenonascii s {
	regsub -all {\[|\\|\]} $s {\\&} s
	regsub -all "\[\x7F-\xFF\]" $s \
	    {[apply {c {format {\x%02X} [scan $c %c]}} &]} s
	return [subst -novariables $s]
    }
} -constraints {exec} -body {
    # If this fails, it may give back: "\xC3\xA9\xC3\xA0\xC3\xBC\xC3\xB1"
    # If it does, this means that the UTF -> external conversion did not occur
    # before writing out the temp file.
    quotenonascii [exec [interpreter] $path(cat) << "\xE9\xE0\xFC\xF1"]
} -cleanup {
    encoding system $sysenc
    rename quotenonascii {}
} -result {\xE9\xE0\xFC\xF1}
test exec-2.7 {handle count redirecting input from immediate source} -constraints {
    exec stdio testhandlecount
} -body {
    set numHandles [testhandlecount]
    list [exec [interpreter] $path(cat) | [interpreter] $path(cat) << "Sample text"] \
	[expr {[testhandlecount] - $numHandles}]
} -result [list {Sample text} 0]

# I/O redirection: output to file.

set path(gorp.file) [makeFile {} gorp.file]
file delete $path(gorp.file)

test exec-3.1 {redirecting output to file} {exec} {
    exec [interpreter] $path(echo) "Some simple words" > $path(gorp.file)
    exec [interpreter] $path(cat) $path(gorp.file)
} "Some simple words"
test exec-3.2 {redirecting output to file} {exec stdio} {
    exec [interpreter] $path(echo) "More simple words" | >$path(gorp.file) [interpreter] $path(cat) | [interpreter] $path(cat)
    exec [interpreter] $path(cat) $path(gorp.file)
} "More simple words"
test exec-3.3 {redirecting output to file} {exec stdio} {
    exec > $path(gorp.file) [interpreter] $path(echo) "Different simple words" | [interpreter] $path(cat) | [interpreter] $path(cat)
    exec [interpreter] $path(cat) $path(gorp.file)
} "Different simple words"
test exec-3.4 {redirecting output to file} {exec} {
    exec [interpreter] $path(echo) "Some simple words" >$path(gorp.file)
    exec [interpreter] $path(cat) $path(gorp.file)
} "Some simple words"
test exec-3.5 {redirecting output to file} {exec} {
    exec [interpreter] $path(echo) "First line" >$path(gorp.file)
    exec [interpreter] $path(echo) "Second line" >> $path(gorp.file)
    exec [interpreter] $path(cat) $path(gorp.file)
} "First line\nSecond line"
test exec-3.6 {redirecting output to file} {exec} {
    exec [interpreter] $path(echo) "First line" >$path(gorp.file)
    exec [interpreter] $path(echo) "Second line" >>$path(gorp.file)
    exec [interpreter] $path(cat) $path(gorp.file)
} "First line\nSecond line"
test exec-3.7 {redirecting output to file} {exec} {
    set f [open $path(gorp.file) w]
    puts $f "Line 1"
    flush $f
    exec [interpreter] $path(echo) "More text" >@ $f
    exec [interpreter] $path(echo) >@$f "Even more"
    puts $f "Line 3"
    close $f
    exec [interpreter] $path(cat) $path(gorp.file)
} "Line 1\nMore text\nEven more\nLine 3"
test exec-3.8 {handle count redirecting output to file} -constraints {
    exec stdio testhandlecount
} -body {
    set numHandles [testhandlecount]
    exec > $path(gorp.file) [interpreter] $path(echo) "Different simple words" | [interpreter] $path(cat) | [interpreter] $path(cat)
    list [exec [interpreter] $path(cat) $path(gorp.file)] \
	[expr {[testhandlecount] - $numHandles}]
} -result [list "Different simple words" 0]

# I/O redirection: output and stderr to file.

file delete $path(gorp.file)

test exec-4.1 {redirecting output and stderr to file} {exec} {
    exec [interpreter] $path(echo) "test output" >& $path(gorp.file)
    exec [interpreter] $path(cat) $path(gorp.file)
} "test output"
test exec-4.2 {redirecting output and stderr to file} {exec} {
    list [exec [interpreter] $path(sh) -c "\"$path(echo)\" foo bar 1>&2" >&$path(gorp.file)] \
	    [exec [interpreter] $path(cat) $path(gorp.file)]
} {{} {foo bar}}
test exec-4.3 {redirecting output and stderr to file} {exec} {
    exec [interpreter] $path(echo) "first line" > $path(gorp.file)
    list [exec [interpreter] $path(sh) -c "\"$path(echo)\" foo bar 1>&2" >>&$path(gorp.file)] \
	    [exec [interpreter] $path(cat) $path(gorp.file)]
} "{} {first line\nfoo bar}"
test exec-4.4 {redirecting output and stderr to file} {exec} {
    set f [open $path(gorp.file) w]
    puts $f "Line 1"
    flush $f
    exec [interpreter] $path(echo) "More text" >&@ $f
    exec [interpreter] $path(echo) >&@$f "Even more"
    puts $f "Line 3"
    close $f
    exec [interpreter] $path(cat) $path(gorp.file)
} "Line 1\nMore text\nEven more\nLine 3"
test exec-4.5 {redirecting output and stderr to file} {exec} {
    set f [open $path(gorp.file) w]
    puts $f "Line 1"
    flush $f
    exec >&@ $f [interpreter] $path(sh) -c "\"$path(echo)\" foo bar 1>&2"
    exec >&@$f [interpreter] $path(sh) -c "\"$path(echo)\" xyzzy 1>&2"
    puts $f "Line 3"
    close $f
    exec [interpreter] $path(cat) $path(gorp.file)
} "Line 1\nfoo bar\nxyzzy\nLine 3"

# I/O redirection: input from file.

if {[testConstraint exec]} {
    exec [interpreter] $path(echo) "Just a few thoughts" > $path(gorp.file)
}
test exec-5.1 {redirecting input from file} {exec} {
    exec [interpreter] $path(cat) < $path(gorp.file)
} {Just a few thoughts}
test exec-5.2 {redirecting input from file} {exec stdio} {
    exec [interpreter] $path(cat) | [interpreter] $path(cat) < $path(gorp.file)
} {Just a few thoughts}
test exec-5.3 {redirecting input from file} {exec stdio} {
    exec [interpreter] $path(cat) < $path(gorp.file) | [interpreter] $path(cat)
} {Just a few thoughts}
test exec-5.4 {redirecting input from file} {exec stdio} {
    exec < $path(gorp.file) [interpreter] $path(cat) | [interpreter] $path(cat)
} {Just a few thoughts}
test exec-5.5 {redirecting input from file} {exec} {
    exec [interpreter] $path(cat) <$path(gorp.file)
} {Just a few thoughts}
test exec-5.6 {redirecting input from file} -constraints {exec} -body {
    set f [open $path(gorp.file) r]
    exec [interpreter] $path(cat) <@ $f
} -cleanup {
    close $f
} -result {Just a few thoughts}
test exec-5.7 {redirecting input from file} -constraints {exec} -body {
    set f [open $path(gorp.file) r]
    exec <@$f [interpreter] $path(cat)
} -cleanup {
    close $f
} -result {Just a few thoughts}
test exec-5.8 {handle count redirecting input from file} -constraints {
    exec stdio testhandlecount
} -body {
    set numHandles [testhandlecount]
    list [exec [interpreter] $path(cat) | [interpreter] $path(cat) < $path(gorp.file)] \
	[expr {[testhandlecount] - $numHandles}]
} -result [list {Just a few thoughts} 0]

# I/O redirection: standard error through a pipeline.

test exec-6.1 {redirecting stderr through a pipeline} {exec stdio} {
    exec [interpreter] $path(sh) -c "\"$path(echo)\" foo bar" |& [interpreter] $path(cat)
} "foo bar"
test exec-6.2 {redirecting stderr through a pipeline} {exec stdio} {
    exec [interpreter] $path(sh) -c "\"$path(echo)\" foo bar 1>&2" |& [interpreter] $path(cat)
} "foo bar"
test exec-6.3 {redirecting stderr through a pipeline} {exec stdio} {
    exec [interpreter] $path(sh) -c "\"$path(echo)\" foo bar 1>&2" \
	|& [interpreter] $path(sh) -c "\"$path(echo)\" second msg 1>&2 ; \"$path(cat)\"" |& [interpreter] $path(cat)
} "second msg\nfoo bar"

# I/O redirection: combinations.

set path(gorp.file2) [makeFile {} gorp.file2]

test exec-7.1 {multiple I/O redirections} {exec} {
    exec << "command input" > $path(gorp.file2) [interpreter] $path(cat) < $path(gorp.file)
    exec [interpreter] $path(cat) $path(gorp.file2)
} {Just a few thoughts}
test exec-7.2 {multiple I/O redirections} {exec} {
    exec < $path(gorp.file) << "command input" [interpreter] $path(cat)
} {command input}

# Long input to command and output from command.
set a "0123456789 xxxxxxxxx abcdefghi ABCDEFGHIJK\n"
set a [concat $a $a $a $a]
set a [concat $a $a $a $a]
set a [concat $a $a $a $a]
set a [concat $a $a $a $a]
test exec-8.1 {long input and output} {exec} {
    exec [interpreter] $path(cat) << $a
} $a
# More than 20 arguments to exec.
test exec-8.2 {long input and output} {exec} {
    exec [interpreter] $path(echo) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
} {1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23}

# Commands that return errors.

test exec-9.1 {commands returning errors} {exec notValgrind} {
    set x [catch {exec gorp456} msg]
    list $x [string tolower $msg] [string tolower $errorCode]
} {1 {couldn't execute "gorp456": no such file or directory} {posix enoent {no such file or directory}}}
test exec-9.2 {commands returning errors} {exec notValgrind} {
    string tolower [list [catch {exec [interpreter] echo foo | foo123} msg] $msg $errorCode]
} {1 {couldn't execute "foo123": no such file or directory} {posix enoent {no such file or directory}}}
test exec-9.3 {commands returning errors} -constraints {exec stdio} -body {
    exec [interpreter] $path(sleep) 1 | [interpreter] $path(exit) 43 | [interpreter] $path(sleep) 1
} -returnCodes error -result {child process exited abnormally}
test exec-9.4 {commands returning errors} -constraints {exec stdio} -body {
    exec [interpreter] $path(exit) 43 | [interpreter] $path(echo) "foo bar"
} -returnCodes error -result {foo bar
child process exited abnormally}
test exec-9.5 {commands returning errors} -constraints {exec stdio notValgrind} -body {
    exec gorp456 | [interpreter] echo a b c
} -returnCodes error -result {couldn't execute "gorp456": no such file or directory}
test exec-9.6 {commands returning errors} -constraints {exec} -body {
    exec [interpreter] $path(sh) -c "\"$path(echo)\" error msg 1>&2"
} -returnCodes error -result {error msg}
test exec-9.7 {commands returning errors} -constraints {exec stdio nonPortable} -body {
    # This test can fail easily on multiprocessor machines
    exec [interpreter] $path(sh) -c "\"$path(echo)\" error msg 1>&2 ; \"$path(sleep)\" 1" \
	| [interpreter] $path(sh) -c "\"$path(echo)\" error msg 1>&2 ; \"$path(sleep)\" 1"
} -returnCodes error -result {error msg
error msg}
set path(err) [makeFile {} err]
test exec-9.8 {commands returning errors} -constraints {exec} -setup {
    set f [open $path(err) w]
    puts $f {
	puts stdout out
	puts stderr err
    }
    close $f
} -body {
    exec [interpreter] $path(err)
} -returnCodes error -result {out
err}

# Errors in executing the Tcl command, as opposed to errors in the processes
# that are invoked.

test exec-10.1 {errors in exec invocation} -constraints {exec} -body {
    exec
} -returnCodes error -result {wrong # args: should be "exec ?-option ...? arg ?arg ...?"}
test exec-10.2 {errors in exec invocation} -constraints {exec} -body {
    exec | cat
} -returnCodes error -result {illegal use of | or |& in command}
test exec-10.3 {errors in exec invocation} -constraints {exec} -body {
    exec cat |
} -returnCodes error -result {illegal use of | or |& in command}
test exec-10.4 {errors in exec invocation} -constraints {exec} -body {
    exec cat | | cat
} -returnCodes error -result {illegal use of | or |& in command}
test exec-10.5 {errors in exec invocation} -constraints {exec} -body {
    exec cat | |& cat
} -returnCodes error -result {illegal use of | or |& in command}
test exec-10.6 {errors in exec invocation} -constraints {exec} -body {
    exec cat |&
} -returnCodes error -result {illegal use of | or |& in command}
test exec-10.7 {errors in exec invocation} -constraints {exec} -body {
    exec cat <
} -returnCodes error -result {can't specify "<" as last word in command}
test exec-10.8 {errors in exec invocation} -constraints {exec} -body {
    exec cat >
} -returnCodes error -result {can't specify ">" as last word in command}
test exec-10.9 {errors in exec invocation} -constraints {exec} -body {
    exec cat <<
} -returnCodes error -result {can't specify "<<" as last word in command}
test exec-10.10 {errors in exec invocation} -constraints {exec} -body {
    exec cat >>
} -returnCodes error -result {can't specify ">>" as last word in command}
test exec-10.11 {errors in exec invocation} -constraints {exec} -body {
    exec cat >&
} -returnCodes error -result {can't specify ">&" as last word in command}
test exec-10.12 {errors in exec invocation} -constraints {exec} -body {
    exec cat >>&
} -returnCodes error -result {can't specify ">>&" as last word in command}
test exec-10.13 {errors in exec invocation} -constraints {exec} -body {
    exec cat >@
} -returnCodes error -result {can't specify ">@" as last word in command}
test exec-10.14 {errors in exec invocation} -constraints {exec} -body {
    exec cat <@
} -returnCodes error -result {can't specify "<@" as last word in command}
test exec-10.15 {errors in exec invocation} -constraints {exec} -body {
    exec cat < a/b/c
} -returnCodes error -result {couldn't read file "a/b/c": no such file or directory}
test exec-10.16 {errors in exec invocation} -constraints {exec} -body {
    exec cat << foo > a/b/c
} -returnCodes error -result {couldn't write file "a/b/c": no such file or directory}
test exec-10.17 {errors in exec invocation} -constraints {exec} -body {
    exec cat << foo > a/b/c
} -returnCodes error -result {couldn't write file "a/b/c": no such file or directory}
set f [open $path(gorp.file) w]
test exec-10.18 {errors in exec invocation} -constraints {exec} -body {
    exec cat <@ $f
} -returnCodes error -result "channel \"$f\" wasn't opened for reading"
close $f
set f [open $path(gorp.file) r]
test exec-10.19 {errors in exec invocation} -constraints {exec} -body {
    exec cat >@ $f
} -returnCodes error -result "channel \"$f\" wasn't opened for writing"
close $f
test exec-10.20.1 {errors in exec invocation} -constraints {unix exec notValgrind} -body {
    exec ~non_existent_user/foo/bar
} -returnCodes error -result {couldn't execute "~non_existent_user/foo/bar": no such file or directory}
test exec-10.20.2 {errors in exec invocation} -constraints {win exec notValgrind} -body {
    exec ~non_existent_user/foo/bar
} -returnCodes error -result {couldn't execute "~non_existent_user\foo\bar": no such file or directory}
test exec-10.21.1 {errors in exec invocation} -constraints {unix exec notValgrind} -body {
    exec [interpreter] true | ~xyzzy_bad_user/x | false
} -returnCodes error -result {couldn't execute "~xyzzy_bad_user/x": no such file or directory}
test exec-10.21.2 {errors in exec invocation} -constraints {win exec notValgrind} -body {
    exec [interpreter] true | ~xyzzy_bad_user/x | false
} -returnCodes error -result {couldn't execute "~xyzzy_bad_user\x": no such file or directory}
test exec-10.22 {errors in exec invocation} -constraints {exec notValgrind} -body {
    exec echo test > ~non_existent_user/foo/bar
} -returnCodes error -result {couldn't write file "~non_existent_user/foo/bar": no such file or directory}
# Commands in background.

test exec-11.1 {commands in background} {exec} {
    set time [time {exec [interpreter] $path(sleep) 2 &}]
    expr {[lindex $time 0] < 1000000}
} 1
test exec-11.2 {commands in background} -constraints {exec} -body {
    exec [interpreter] $path(echo) a &b
} -result {a &b}
test exec-11.3 {commands in background} {exec} {
    llength [exec [interpreter] $path(sleep) 1 &]
} 1
test exec-11.4 {commands in background} {exec stdio} {
    llength [exec [interpreter] $path(sleep) 1 | [interpreter] $path(sleep) 1 | [interpreter] $path(sleep) 1 &]
} 3
test exec-11.5 {commands in background} {exec} {
    set f [open $path(gorp.file) w]
    puts $f [list catch [list exec [info nameofexecutable] $path(echo) foo &]]
    close $f
    exec [interpreter] $path(gorp.file)
} foo
test exec-11.6 {commands in background} -constraints {
    exec stdio testhandlecount
} -body {
    set numHandles [testhandlecount]
    set n [llength [exec [interpreter] $path(sleep) 1 | [interpreter] $path(sleep) 1 | [interpreter] $path(sleep) 1 &]]
    after 1100
    tcl::process::purge
    list $n [expr {([testhandlecount] - $numHandles) <= 0}]; # Could be < 0 if prior processes were reaped
} -result {3 1}

# Make sure that background commands are properly reaped when they
# eventually die.

if {[testConstraint exec] && [testConstraint nonPortable]} {
    after 1300
    exec [interpreter] $path(sleep) 1
}
test exec-12.1 {reaping background processes} {exec unix nonPortable} {
    for {set i 0} {$i < 20} {incr i} {
	exec echo foo > /dev/null &
    }
    after 1000
    catch {exec ps | fgrep "echo foo" | fgrep -v fgrep | wc} msg
    lindex $msg 0
} 0
test exec-12.2 {reaping background processes} {exec unix nonPortable} {
    exec sleep 2 | sleep 2 | sleep 2 &
    catch {exec ps | fgrep -i "sleep" | fgrep -i -v fgrep | wc} msg
    set x [lindex $msg 0]
    after 3000
    catch {exec ps | fgrep -i "sleep" | fgrep -i -v fgrep | wc} msg
    list $x [lindex $msg 0]
} {3 0}
test exec-12.3 {reaping background processes} {exec unix nonPortable} {
    exec sleep 1000 &
    exec sleep 1000 &
    set x [exec ps | fgrep "sleep" | fgrep -v fgrep]
    set pids {}
    foreach i [split $x \n] {
	lappend pids [lindex $i 0]
    }
    foreach i $pids {
	catch {exec kill -STOP $i}
    }
    catch {exec ps | fgrep "sleep" | fgrep -v fgrep | wc} msg
    set x [lindex $msg 0]
    foreach i $pids {
	catch {exec kill -KILL $i}
    }
    catch {exec ps | fgrep "sleep" | fgrep -v fgrep | wc} msg
    list $x [lindex $msg 0]
} {2 0}

# Make sure "errorCode" is set correctly.

test exec-13.1 {setting errorCode variable} {exec} {
    list [catch {exec [interpreter] $path(cat) < a/b/c} msg] [string tolower $errorCode]
} {1 {posix enoent {no such file or directory}}}
test exec-13.2 {setting errorCode variable} {exec} {
    list [catch {exec [interpreter] $path(cat) > a/b/c} msg] [string tolower $errorCode]
} {1 {posix enoent {no such file or directory}}}
test exec-13.3 {setting errorCode variable} {exec notValgrind} {
    set x [catch {exec _weird_cmd_} msg]
    list $x [string tolower $msg] [lindex $errorCode 0] \
	    [string tolower [lrange $errorCode 2 end]]
} {1 {couldn't execute "_weird_cmd_": no such file or directory} POSIX {{no such file or directory}}}
test exec-13.4 {extended exit result codes} -setup {
    set tmp [makeFile {exit 0x00000101} tmpfile.exec-13.4]
} -constraints {win} -body {
    list [catch {exec [interpreter] $tmp} err] [lreplace $::errorCode 1 1 {}]
} -cleanup {
    removeFile $tmp
} -result {1 {CHILDSTATUS {} 257}}
test exec-13.5 {extended exit result codes: max value} -setup {
    set tmp [makeFile {exit 0x3fffffff} tmpfile.exec-13.5]
} -constraints {win} -body {
    list [catch {exec [interpreter] $tmp} err] [lreplace $::errorCode 1 1 {}]
} -cleanup {
    removeFile $tmp
} -result {1 {CHILDSTATUS {} 1073741823}}
test exec-13.6 {extended exit result codes: signalled} -setup {
    set tmp [makeFile {exit 0xC0000016} tmpfile.exec-13.6]
} -constraints {win} -body {
    list [catch {exec [interpreter] $tmp} err] [lreplace $::errorCode 1 1 {}]
} -cleanup {
    removeFile $tmp
} -result {1 {CHILDKILLED {} SIGABRT SIGABRT}}

# Switches before the first argument

test exec-14.1 {-keepnewline switch} {exec} {
    exec -keepnewline [interpreter] $path(echo) foo
} "foo\n"
test exec-14.2 {-keepnewline switch} -constraints {exec} -body {
    exec -keepnewline
} -returnCodes error -result {wrong # args: should be "exec ?-option ...? arg ?arg ...?"}
test exec-14.3 {unknown switch} -constraints {exec} -body {
    exec -gorp
} -returnCodes error -result {bad option "-gorp": must be -ignorestderr, -keepnewline, -encoding, or --}
test exec-14.4 {-- switch} -constraints {exec notValgrind} -body {
    exec -- -gorp
} -returnCodes error -result {couldn't execute "-gorp": no such file or directory}
test exec-14.5 {-ignorestderr switch} {exec} {
    # Alas, the use of -ignorestderr is buried here :-(
    exec [interpreter] $path(sh2) -c [list $path(echo2) foo bar] 2>@1
} "foo bar\nbar"

# Redirecting standard error separately from standard output

test exec-15.1 {standard error redirection} {exec} {
    exec [interpreter] $path(echo) "First line" > $path(gorp.file)
    list [exec [interpreter] $path(sh) -c "\"$path(echo)\" foo bar 1>&2" 2> $path(gorp.file)] \
	    [exec [interpreter] $path(cat) $path(gorp.file)]
} {{} {foo bar}}
test exec-15.2 {standard error redirection} {exec stdio} {
    list [exec [interpreter] $path(sh) -c "\"$path(echo)\" foo bar 1>&2" \
	      | [interpreter] $path(echo) biz baz >$path(gorp.file) 2> $path(gorp.file2)] \
	[exec [interpreter] $path(cat) $path(gorp.file)] \
	[exec [interpreter] $path(cat) $path(gorp.file2)]
} {{} {biz baz} {foo bar}}
test exec-15.3 {standard error redirection} {exec stdio} {
    list [exec [interpreter] $path(sh) -c "\"$path(echo)\" foo bar 1>&2" \
	      | [interpreter] $path(echo) biz baz 2>$path(gorp.file) > $path(gorp.file2)] \
	[exec [interpreter] $path(cat) $path(gorp.file)] \
	[exec [interpreter] $path(cat) $path(gorp.file2)]
} {{} {foo bar} {biz baz}}
test exec-15.4 {standard error redirection} {exec} {
    set f [open $path(gorp.file) w]
    puts $f "Line 1"
    flush $f
    exec [interpreter] $path(sh) -c "\"$path(echo)\" foo bar 1>&2" 2>@ $f
    puts $f "Line 3"
    close $f
    readfile $path(gorp.file)
} {Line 1
foo bar
Line 3}
test exec-15.5 {standard error redirection} {exec} {
    exec [interpreter] $path(echo) "First line" > "$path(gorp.file)"
    exec [interpreter] "$path(sh)" -c "\"$path(echo)\" foo bar 1>&2" 2>> "$path(gorp.file)"
    readfile $path(gorp.file)
} {First line
foo bar}
test exec-15.6 {standard error redirection} {exec stdio} {
    exec [interpreter] "$path(sh)" -c "\"$path(echo)\" foo bar 1>&2" > "$path(gorp.file2)" 2> "$path(gorp.file)" \
	    >& "$path(gorp.file)" 2> "$path(gorp.file2)" | [interpreter] $path(echo) biz baz
    list [readfile $path(gorp.file)] [readfile $path(gorp.file2)]
} {{biz baz} {foo bar}}
test exec-15.7 {standard error redirection 2>@1} {exec stdio} {
    # This redirects stderr output into normal result output from exec
    exec [interpreter] "$path(sh)" -c "\"$path(echo)\" foo bar 1>&2" 2>@1
} {foo bar}

test exec-16.1 {flush output before exec} {exec} {
    set f [open $path(gorp.file) w]
    puts $f "First line"
    exec [interpreter] $path(echo) "Second line" >@ $f
    puts $f "Third line"
    close $f
    readfile $path(gorp.file)
} {First line
Second line
Third line}
test exec-16.2 {flush output before exec} {exec} {
    set f [open $path(gorp.file) w]
    puts $f "First line"
    exec [interpreter] << {puts stderr {Second line}} >&@ $f > $path(gorp.file2)
    puts $f "Third line"
    close $f
    readfile $path(gorp.file)
} {First line
Second line
Third line}

test exec-17.1 {inheriting standard I/O} -constraints {exec} -setup {
    set path(script) [makeFile {} script]
    set f [open $path(script) w]
    puts $f [list lassign [list \
	    [info nameofexecutable] $path(gorp.file) $path(echo) $path(sleep) \
	] exe file echo sleep]
    puts $f {
	close stdout
	set f [open $file w]
	catch {exec $exe $echo foobar &}
	exec $exe $sleep 2
	close $f
    }
    close $f
} -body {
    catch {exec [interpreter] $path(script)} result
    list $result [readfile $path(gorp.file)]
} -cleanup {
    removeFile $path(script)
} -result {{} foobar}

test exec-18.1 {exec deals with weird file names} -body {
    set path(fooblah) [makeFile {contents} "foo\[\{blah"]
    exec [interpreter] $path(cat) $path(fooblah)
} -constraints {exec} -cleanup {
    removeFile $path(fooblah)
} -result contents
test exec-18.2 {exec cat deals with weird file names} -body {
    # This is cross-platform, but the cat isn't predictably correct on
    # Windows.
    set path(fooblah) [makeFile {contents} "foo\[\{blah"]
    exec cat $path(fooblah)
} -constraints {exec tempNotWin} -cleanup {
    removeFile $path(fooblah)
} -result contents

# Note that this test cannot be adapted to work on Windows; that platform has
# no kernel support for an analog of O_APPEND. OTOH, that means we can assume
# that there is a POSIX shell...
#
# This test also fails in some cases when building with macOS
test exec-19.1 {exec >> uses O_APPEND} -constraints {exec unix notValgrind noosxCI} -setup {
    set tmpfile [makeFile {0} tmpfile.exec-19.1]
} -body {
    # Note that we have to allow for the current contents of the temporary
    # file, which is why the result is 14 and not 12
    exec /bin/sh -c \
	    {for a in 1 2 3; do sleep 1; echo $a; done} >>$tmpfile &
    exec /bin/sh -c \
	    {for a in 4 5 6; do sleep 1; echo $a >&2; done} 2>>$tmpfile &
    exec /bin/sh -c \
	    {for a in a b c; do sleep 1; echo $a; done} >>$tmpfile &
    exec /bin/sh -c \
	    {for a in d e f; do sleep 1; echo $a >&2; done} 2>>$tmpfile &
    # The above four shell invocations take about 3 seconds to finish, so allow
    # 5s (in case the machine is busy)
    after 5000
    # Check that no bytes have got lost through mixups with overlapping
    # appends, which is only guaranteed to work when we set O_APPEND on the
    # file descriptor in the [exec >>...]
    file size $tmpfile
} -cleanup {
    removeFile $tmpfile
} -result 26

# Tests to ensure batch files and .CMD (Bug 9ece99d58b)
# can be executed on Windows
test exec-20.0 {exec .bat file} -constraints {win} -body {
    set log [makeFile {} exec20.log]
    exec [makeFile "echo %1> $log" exec20.bat] "Testing exec-20.0"
    viewFile $log
} -result "\"Testing exec-20.0\""
test exec-20.1 {exec .CMD file} -constraints {win} -body {
    set log [makeFile {} exec201.log]
    exec [makeFile "echo %1> $log" exec201.CMD] "Testing exec-20.1"
    viewFile $log
} -result "\"Testing exec-20.1\""

# Test with encoding mismatches (Bug 0f1ddc0df7fb7)
test exec-21.1 {exec encoding mismatch on stdout} -setup {
    set path(script) [makeFile {
	fconfigure stdout -translation binary
	puts a\xe9b
    } script]
    set enc [encoding system]
    encoding system utf-8
} -cleanup {
    removeFile $path(script)
    encoding system $enc
} -body {
    exec [info nameofexecutable] $path(script)
} -result a\uFFFDb
test exec-21.2 {exec encoding mismatch on stderr} -setup {
    set path(script) [makeFile {
	fconfigure stderr -translation binary
	puts stderr a\xe9b
    } script]
    set enc [encoding system]
    encoding system utf-8
} -cleanup {
    removeFile $path(script)
    encoding system $enc
} -body {
    list [catch {exec [info nameofexecutable] $path(script)} r] $r
} -result [list 1 a\uFFFDb]

# TIP 716 -encoding option
test exec-22.0 {exec -encoding} -body {
    set enc [expr {[encoding system] eq "utf-8" ? "iso2022-jp" : "utf-8"}]
    exec -encoding $enc -- [interpreter] $path(echobin) [binary encode hex [encoding convertto $enc \u4e4e\u68d9]]
} -result \u4e4e\u68d9
test exec-22.1 {exec -encoding invalid encoding} -body {
    exec -encoding nosuchencoding -- [interpreter] $path(echobin) abc
} -result {unknown encoding "nosuchencoding"} -returnCodes error

test exec-bug-4f0b5767ac {exec App Execution Alias} -setup {
    # Ensure winget is on the PATH
    set savedEnv $::env(PATH)
    append env(PATH) ";" [file nativename [file dirname $wingetPath]]
} -cleanup {
    set ::env(PATH) $savedEnv
    unset -nocomplain savedEnv
} -constraints haveWinget -body {
    exec winget --info
} -result "*Windows*" -match glob

foreach cmdBuiltin {
    assoc call cd cls color copy date del dir echo
    erase exit ftype for if md mkdir mklink move path
    pause prompt rd ren rename rmdir set start time
    title type ver vol
} {
    test auto_execok-$cmdBuiltin-1.0 "auto_execok $cmdBuiltin" \
	-constraints win \
	-body {
	    string equal [auto_execok $cmdBuiltin] \
		"[file normalize $::env(COMSPEC)] /c $cmdBuiltin"
	} -result 1
}
unset cmdBuiltin

# ----------------------------------------------------------------------
# cleanup

foreach file {gorp.file gorp.file2 echo echo2 echobin cat wc sh sh2 sleep exit err} {
    removeFile $file
}
unset -nocomplain path tmp wingetPath

::tcltest::cleanupTests
return

# Local Variables:
# mode: tcl
# End:
