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Date:      Sun, 14 Sep 2025 20:00:54 -0500
From:      Kyle Evans <kevans@FreeBSD.org>
To:        "Danilo G. Baio" <dbaio@FreeBSD.org>, src-committers@freebsd.org, dev-commits-src-all@freebsd.org, dev-commits-src-main@freebsd.org
Cc:        James Gritton <jamie@gritton.org>
Subject:   Re: git: dbaaadd4373a - main - jls: minor simplification to arg handling
Message-ID:  <abf51345-d48b-4e13-a2f0-2fdda37914ce@FreeBSD.org>
In-Reply-To: <54e7f090-c031-47f2-bc51-c020a77ab00a@app.fastmail.com>
References:  <202507260314.56Q3E5cY002869@gitrepo.freebsd.org> <54e7f090-c031-47f2-bc51-c020a77ab00a@app.fastmail.com>

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On 9/14/25 19:14, Danilo G. Baio wrote:
> 
> 
> On Sat, Jul 26, 2025, at 00:14, Kyle Evans wrote:
>> The branch main has been updated by kevans:
>>
>> URL:
>> https://cgit.FreeBSD.org/src/commit/?id=dbaaadd4373a725950ad11e578dab61537b7c4f2
>>
>> commit dbaaadd4373a725950ad11e578dab61537b7c4f2
>> Author:     Kyle Evans <kevans@FreeBSD.org>
>> AuthorDate: 2025-07-26 03:13:41 +0000
>> Commit:     Kyle Evans <kevans@FreeBSD.org>
>> CommitDate: 2025-07-26 03:13:41 +0000
>>
>>      jls: minor simplification to arg handling
>>     
>>      It's easier to reason about the state of argc/argv if we just augment
>>      them by optind after our getopt() loop.
>>     
>>      No functional change, but this sets the stage for another change to add
>>      a `-c` mode to (c)heck for the existence of a jail quietly without
>>      the caller having to worry about spurious output.
>>     
>>      Reviewed by:    jamie
>>      Differential Revision:  https://reviews.freebsd.org/D51540
>> ---
>>   usr.sbin/jls/jls.c | 10 ++++++----
>>   1 file changed, 6 insertions(+), 4 deletions(-)
>>
>> diff --git a/usr.sbin/jls/jls.c b/usr.sbin/jls/jls.c
>> index bd193a69c458..a1d1716713aa 100644
>> --- a/usr.sbin/jls/jls.c
>> +++ b/usr.sbin/jls/jls.c
>> @@ -140,8 +140,11 @@ main(int argc, char **argv)
>>   	ip4_ok = feature_present("inet");
>>   #endif
>>
>> +	argc -= optind;
>> +	argv += optind;
>> +
>>   	/* Add the parameters to print. */
>> -	if (optind == argc) {
>> +	if (argc == 0) {
>>   		if (pflags & (PRINT_HEADER | PRINT_NAMEVAL))
>>   			add_param("all", NULL, (size_t)0, NULL, JP_USER);
>>   		else if (pflags & PRINT_VERBOSE) {
>> @@ -179,9 +182,8 @@ main(int argc, char **argv)
>>   		}
>>   	} else {
>>   		pflags &= ~PRINT_VERBOSE;
>> -		while (optind < argc)
>> -			add_param(argv[optind++], NULL, (size_t)0, NULL,
>> -			    JP_USER);
>> +		for (i = 0; i < argc; i++)
>> +			add_param(argv[i], NULL, (size_t)0, NULL, JP_USER);
>>   	}
>>
>>   	if (pflags & PRINT_SKIP) {
> 
> 
> Hi,
> 
> Just replying to one of the recent changes on `jls`.
> 
> We use `jls -n` in many scripts, and recently, it stopped working.
> 
> The last build that was working for us:
> FreeBSD 15.0-CURRENT #0 main-n278879-4be9c6f38e78: Sat Jul 19 13:19:25 UTC 2025
> 
> We are now encountering the following issue on this build:
> FreeBSD 16.0-CURRENT #0 main-n280141-5e82eeccd252: Sat Sep  6 05:27:34 UTC 2025
> 
> $ jls -n
> desc=0 devfs_ruleset=0 nodying enforce_statfs=0 env="" host=disable ip4=disable ip6=disable jid=0 meta="" name="" osreldate=0 osrelease="" parent=0 path="" nopersist securelevel=0 sysvmsg=disable sysvsem=disable sysvshm=disable vnet=disable zfs=disable allow.noadjtime allow.nochflags allow.noextattr allow.nomlock allow.nomount allow.mount.nodevfs allow.mount.nofdescfs allow.mount.nonullfs allow.mount.noprocfs allow.mount.notmpfs allow.mount.nozfs allow.nonfsd allow.noquotas allow.noraw_sockets allow.noread_msgbuf allow.noreserved_ports allow.norouting allow.noset_hostname allow.nosettime allow.nosocket_af allow.nosuser allow.nosysvipc allow.nounprivileged_parent_tampering allow.nounprivileged_proc_debug children.cur=0 children.max=0 cpuset.id=0 host.domainname="" host.hostid=0 host.hostname="" host.hostuuid="" ip4.addr=0.0.0.0,0.0.0.0,0.0.0.0,0.0.0.0,0.0.0.0,0.0.0.0,0.0.0.0 ip4.nosaddrsel ip6.addr=::,::,::,::,::,:: ip6.nosaddrsel zfs.mount_snapshot=0
> desc=0 devfs_ruleset=0 nodying enforce_statfs=0 env="" host=disable ip4=disable ip6=disable jid=0 meta="" name="" osreldate=0 osrelease="" parent=0 path="" nopersist securelevel=0 sysvmsg=disable sysvsem=disable sysvshm=disable vnet=disable zfs=disable allow.noadjtime allow.nochflags allow.noextattr allow.nomlock allow.nomount allow.mount.nodevfs allow.mount.nofdescfs allow.mount.nonullfs allow.mount.noprocfs allow.mount.notmpfs allow.mount.nozfs allow.nonfsd allow.noquotas allow.noraw_sockets allow.noread_msgbuf allow.noreserved_ports allow.norouting allow.noset_hostname allow.nosettime allow.nosocket_af allow.nosuser allow.nosysvipc allow.nounprivileged_parent_tampering allow.nounprivileged_proc_debug children.cur=0 children.max=0 cpuset.id=0 host.domainname="" host.hostid=0 host.hostname="" host.hostuuid="" ip4.addr=0.0.0.0,0.0.0.0,0.0.0.0,0.0.0.0,0.0.0.0,0.0.0.0,0.0.0.0 ip4.nosaddrsel ip6.addr=::,::,::,::,::,:: ip6.nosaddrsel zfs.mount_snapshot=0
> desc=0 devfs_ruleset=0 nodying enforce_statfs=0 env="" host=disable ip4=disable ip6=disable jid=0 meta="" name="" osreldate=0 osrelease="" parent=0 path="" nopersist securelevel=0 sysvmsg=disable sysvsem=disable sysvshm=disable vnet=disable zfs=disable allow.noadjtime allow.nochflags allow.noextattr allow.nomlock allow.nomount allow.mount.nodevfs allow.mount.nofdescfs allow.mount.nonullfs allow.mount.noprocfs allow.mount.notmpfs allow.mount.nozfs allow.nonfsd allow.noquotas allow.noraw_sockets allow.noread_msgbuf allow.noreserved_ports allow.norouting allow.noset_hostname allow.nosettime
> [...]
> infinite loop
> 

Adding jamie@, neither of the changes to jls(1) should've caused this, as far as I can reason about (and I haven't observed this here, yet).  This looks like a failure to terminate the print_jail loop at the end?



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