Hello
Note: Sending this a second time, I forgot to confirm my request to register to the bug-gnu-emacs list.
I am running Linux with kernel 6.6.47 and am running emacs in xterm, using the -nw command line argument.
When following the example, I added the suspend-resume-hook to my .emacs.d/init.el file. When I run M-: (suspend-emacs "pwd")
it does not show the current working directory. But when I do fg from
the terminal that I got into, I see the "Resumed!" message.
The stuff_char function is using ioctl with
TIOCSTI. TIOCSTI requires CAP_SYS_ADMIN capability. You can set this
capability using sysctl setting dev.tty.legacy_tiocsti to 1.
Unless I had set "dev.tty.legacy_tiocsti" to 1 I could not run the suspend-emacs command with an argument string.
Either
emacs can check the return value of ioctl in stuff_char and if there
return value is EPERM, then handle this accordingly, with a message
regarding the problem.
Or the information
relating to the kernel version and CAP_SYS_ADMIN can be added to the
infor page os suspend_emacs, along with the information on how to set
this capability using sysctl.
Kind Regards
Riza Dindir