I have tried (and failed) using the setcap command to allow the ports <1024 to be used, but the command has failed with the following:

sbbs@greg-Virtual-Machine:~/sbbs/exec$ sudo setcap cap_net_bind_service=+ep /home/sbbs/sbbs/exec/sbbs
Failed to set capabilities on file `/home/sbbs/sbbs/exec/sbbs' (Invalid argument)
The value of the capability argument is not permitted for a file. Or the file is not a regular (non-symlink) file

any help would be appreciated. I have looked on the web and could not come up with anything better than what I have done here.
Thanks!
--- SBBSecho 3.11-Win32
* Origin: Ice Castle BBS, Anchorage, AK (1:153/143)

Ghost wrote to All <=-

I have tried (and failed) using the setcap command to allow the
ports <1024 to be used, but the command has failed with the
following:

sbbs@greg-Virtual-Machine:~/sbbs/exec$ sudo setcap cap_net_bind_service=+ep /home/sbbs/sbbs/exec/sbbs Failed to set capabilities on file `/home/sbbs/sbbs/exec/sbbs' (Invalid
argument) The value of the capability argument is not permitted
for a file. Or the file is not a regular (non-symlink) file

any help would be appreciated. I have looked on the web and could
not come up with anything better than what I have done here.

My guess is that the 'sbbs' executable (/home/sbbs/sbbs/exec/sbbs) is
actually a symlink to the actual file (/home/sbbs/sbbs/repo/exec/sbbs),
and it's failing for the reason given in that error message regarding a symlink.

Haven't tested this, since I don't use symlinks, but perhaps try running
the setcap command on the file (/home/sbbs/sbbs/repo/exec/sbbs).



... All the easy problems have been solved.
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Re: setcap command
By: Ghost to All on Sun Oct 09 2022 06:40 pm

I have tried (and failed) using the setcap command to allow the ports <1024 to be used, but the command has failed with the following:

sbbs@greg-Virtual-Machine:~/sbbs/exec$ sudo setcap cap_net_bind_service=+ep /home/sbbs/sbbs/exec/sbbs Failed to set capabilities on file `/home/sbbs/sbbs/exec/sbbs' (Invalid argument) The value of the capability argument is not permitted for a file. Or the file is not a regular (non-symlink) file

One of the resources you can use in Linux is the 'man' utility, which looks up a manual page for various commands, if it exists. You can use the command 'man setcap', for instance, to look up the documentation for setcap (and it looks like there is a manual page for that). It will explain the arguments it requires.

Nightfox

---
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Re: setcap command
By: Ghost to All on Sun Oct 09 2022 06:40 pm

I have tried (and failed) using the setcap command to allow the ports <1024 to be used, but the command has failed with the following:

sbbs@greg-Virtual-Machine:~/sbbs/exec$ sudo setcap cap_net_bind_service=+ep /home/sbbs/sbbs/exec/sbbs
Failed to set capabilities on file `/home/sbbs/sbbs/exec/sbbs' (Invalid argument)
The value of the capability argument is not permitted for a file. Or the file is not a regular (non-symlink) file

any help would be appreciated. I have looked on the web and could not come up with anything better than what I have done here.

Sounds like /home/sbbs/sbbs/exec/sbbs is a symlink. Specify 'setcap' as a 'make' target is the better/preferred way of getting those capabilities set on sbbs.
--
digital man (rob)

Sling Blade quote #22:
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* Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)

Re: Re: setcap command
By: Gamgee to Ghost on Mon Oct 10 2022 08:18 am

sbbs@greg-Virtual-Machine:~/sbbs/exec$ sudo setcap cap_net_bind_service=+ep /home/sbbs/sbbs/exec/sbbs Failed to
set
capabilities on file `/home/sbbs/sbbs/exec/sbbs' (Invalid
argument) The value of the capability argument is not permitted
for a file. Or the file is not a regular (non-symlink) file

any help would be appreciated. I have looked on the web and could
not come up with anything better than what I have done here.

My guess is that the 'sbbs' executable (/home/sbbs/sbbs/exec/sbbs) is actually a symlink to the actual file (/home/sbbs/sbbs/repo/exec/sbbs),
and it's failing for the reason given in that error message regarding a symlink.

Well, I haven't set up any symlinks, so unless it was done when installed, I don't know. However, I tried your suggestion and got the same response from the system.
sbbs@greg-Virtual-Machine:~/sbbs/exec$ sudo setcap cap_net_bind_service=+ep /home/sbbs/sbbs/repo/exec/sbbs Failed to
set capabilities on file `/home/sbbs/sbbs/repo/exec/sbbs' (Invalid argument) The value of the capability argument is not permitted for a file. Or the file is not a regular (non-symlink) file
--- SBBSecho 3.11-Win32
* Origin: Ice Castle BBS, Anchorage, AK (1:153/143)

Re: Re: setcap command
By: Ghost to Gamgee on Mon Oct 10 2022 12:42 pm

Re: Re: setcap command
By: Gamgee to Ghost on Mon Oct 10 2022 08:18 am

sbbs@greg-Virtual-Machine:~/sbbs/exec$ sudo setcap cap_net_bind_service=+ep /home/sbbs/sbbs/exec/sbbs Failed to
set
capabilities on file `/home/sbbs/sbbs/exec/sbbs' (Invalid
argument) The value of the capability argument is not permitted
for a file. Or the file is not a regular (non-symlink) file

any help would be appreciated. I have looked on the web and could not come up with anything better than what I have done here.

My guess is that the 'sbbs' executable (/home/sbbs/sbbs/exec/sbbs) is actually a symlink to the actual file (/home/sbbs/sbbs/repo/exec/sbbs), and it's failing for the reason given in that error message regarding a symlink.

Well, I haven't set up any symlinks, so unless it was done when installed, I don't know.

The suggested installation steps creates symlinks from exec/* to the build output directories: http://wiki.synchro.net/install:nix

However, I tried your suggestion and got the same response from
the system.
sbbs@greg-Virtual-Machine:~/sbbs/exec$ sudo setcap cap_net_bind_service=+ep /home/sbbs/sbbs/repo/exec/sbbs Failed to
set capabilities on file `/home/sbbs/sbbs/repo/exec/sbbs' (Invalid argument) The value of the capability argument is not permitted for a file. Or the file is not a regular (non-symlink) file

Use "ls -l" or "readlink" to determine if a file is in fact a symlink, e.g.:
$ readlink /sbbs/exec/sbbs ../../../home/rswindell/sbbs/src/sbbs3/gcc.linux.x64.exe.debug/sbbs

Again, the suggested method of setting capabilities is to use the "setcap" build target as instructed here:
http://wiki.synchro.net/install:nix#updating
--
digital man (rob)

Synchronet "Real Fact" #8:
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Re: Re: setcap command
By: Digital Man to Ghost on Mon Oct 10 2022 02:26 pm

sbbs@greg-Virtual-Machine:~/sbbs/exec$ sudo setcap cap_net_bind_service=+ep /home/sbbs/sbbs/repo/exec/sbbs Failed to
set capabilities on file `/home/sbbs/sbbs/repo/exec/sbbs' (Invalid argument) The value of the capability argument is not permitted for a file. Or the file is not a regular
(non-symlink) file

Use "ls -l" or "readlink" to determine if a file is in fact a symlink, e.g.: $ readlink /sbbs/exec/sbbs ../../../home/rswindell/sbbs/src/sbbs3/gcc.linux.x64.exe.debug/sbbs

Again, the suggested method of setting capabilities is to use the "setcap" build target as instructed here:
http://wiki.synchro.net/install:nix#updating
--

The suggested method shown worked. Thanks again for your assistance.
--- SBBSecho 3.11-Win32
* Origin: Ice Castle BBS, Anchorage, AK (1:153/143)

Ghost wrote to Gamgee <=-

Re: Re: setcap command
By: Gamgee to Ghost on Mon Oct 10 2022 08:18 am

sbbs@greg-Virtual-Machine:~/sbbs/exec$ sudo setcap

cap_net_bind_service=+

ep /home/sbbs/sbbs/exec/sbbs Failed to
set
capabilities on file `/home/sbbs/sbbs/exec/sbbs' (Invalid
argument) The value of the capability argument is not permitted
for a file. Or the file is not a regular (non-symlink) file

any help would be appreciated. I have looked on the web and could
not come up with anything better than what I have done here.

My guess is that the 'sbbs' executable (/home/sbbs/sbbs/exec/sbbs) is actually a symlink to the actual file (/home/sbbs/sbbs/repo/exec/sbbs),
and it's failing for the reason given in that error message regarding a

syml

ink.

Well, I haven't set up any symlinks, so unless it was done when
installed, I don't know. However, I tried your suggestion and got
the same response from the system.

Well, if you followed the installation instructions example, you may
have set up symlinks. On your "make install" command line to install,
did you also include "SYMLINK=1" ?

Or just do the command "ls -l" while in the /sbbs directory, and see if
there are symlinks there, or not.



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Re: Re: setcap command
By: Gamgee to Ghost on Mon Oct 10 2022 09:33 pm

Or just do the command "ls -l" while in the /sbbs directory, and see if there are symlinks there, or not.

have set up symlinks. On your "make install" command line to install,
did you also include "SYMLINK=1" ?

Or just do the command "ls -l" while in the /sbbs directory, and see if there are symlinks there, or not.

I tried another suggestion last night and it is now working correctly.
Thanks for the help
--- SBBSecho 3.11-Win32
* Origin: Ice Castle BBS, Anchorage, AK (1:153/143)

Re: Re: setcap command
By: Gamgee to Ghost on Mon Oct 10 2022 08:18:00

Ghost wrote to All <=-

I have tried (and failed) using the setcap command to allow the
ports <1024 to be used, but the command has failed with the
following:

sbbs@greg-Virtual-Machine:~/sbbs/exec$ sudo setcap cap_net_bind_service=+ep /home/sbbs/sbbs/exec/sbbs Failed to set capabilities on file `/home/sbbs/sbbs/exec/sbbs' (Invalid
argument) The value of the capability argument is not permitted
for a file. Or the file is not a regular (non-symlink) file

My guess is that the 'sbbs' executable (/home/sbbs/sbbs/exec/sbbs) is actually a symlink to the actual file (/home/sbbs/sbbs/repo/exec/sbbs), and it's failing for the reason given in that error message regarding a symlink.

symlinks shouldnt matter in this regard, most likely the path is wrong (or h isnt root when he is running the commanf)...
the /home/sbbs/sbbs bit looks suspect, but i don't know how he has installed it.

setcap works fine on symlinks

regards
---

Charles Blackburn
The F.B.O BBS 21:1/221 618:250/36
bbs.thefbo.us IPV4/V6
DOVE-Net FSX-Net MicroNET USENET




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Re: Re: setcap command
By: Charles Blackburn to Gamgee on Tue Oct 11 2022 04:09 pm

setcap works fine on symlinks

No, it does not. If /sbbs/exec/sbbs is a symlink, for example, attempting to setcap on it results in this error (as was previously reported):

$ sudo setcap cap_net_bind_service=+ep /sbbs/exec/sbbs
Failed to set capabilities on file `/sbbs/exec/sbbs' (Invalid argument)
The value of the capability argument is not permitted for a file. Or the file is not a regular (non-symlink) file
--
digital man (rob)

Synchronet/BBS Terminology Definition #49:
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