Why calling agetty directly from bash doesn't seem to have any effect?
I try to call /usr/bin/agetty - from bash in a terminal-emulator(both X-based and Kernel-based), then it asked me to input a username, but after input that username, it just "freeze" a little while, then dropped me back into my original bash promote.
I started to wonder, agetty is started by systemd as a service using the ttyx device and execve(/usr/bin/login) so it will give me login promote, because login is configured with pam_systemd, so a systemd session will be created. But that's not the result I get when I directly run agetty - as I mentioned above, no new session is created when I check systemctl status.
Then I thought if it was because agetty run as normal user, it might check its own EUID or something, but that just cause my bash to exit after I input the username.
Ok, I checked systemctl status again, it told me systemd run this program as /sbin/agetty -o -p -- u --noclear tty2 linux, ok, I login as root on tty2, then run agetty -o -p -- u --noclear - linux, I got exactly the same situation as in the first place —— I was dropped back to bash again.
Could anyone explain to me about these experiment results to me?
If it helps, I'm using ArchLinux, /usr/bin/login and /usr/bin/agetty are both from the util-linux 2.33-2 package.
linux systemd login getty
asked 6 mins ago
炸鱼薯条德里克
399114
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I try to call /usr/bin/agetty - from bash in a terminal-emulator(both X-based and Kernel-based), then it asked me to input a username, but after input that username, it just "freeze" a little while, then dropped me back into my original bash promote.
I started to wonder, agetty is started by systemd as a service using the ttyx device and execve(/usr/bin/login) so it will give me login promote, because login is configured with pam_systemd, so a systemd session will be created. But that's not the result I get when I directly run agetty - as I mentioned above, no new session is created when I check systemctl status.
Then I thought if it was because agetty run as normal user, it might check its own EUID or something, but that just cause my bash to exit after I input the username.
Ok, I checked systemctl status again, it told me systemd run this program as /sbin/agetty -o -p -- u --noclear tty2 linux, ok, I login as root on tty2, then run agetty -o -p -- u --noclear - linux, I got exactly the same situation as in the first place —— I was dropped back to bash again.
Could anyone explain to me about these experiment results to me?
If it helps, I'm using ArchLinux, /usr/bin/login and /usr/bin/agetty are both from the util-linux 2.33-2 package.
linux systemd login getty
asked 6 mins ago
炸鱼薯条德里克
399114
add a comment |
I try to call /usr/bin/agetty - from bash in a terminal-emulator(both X-based and Kernel-based), then it asked me to input a username, but after input that username, it just "freeze" a little while, then dropped me back into my original bash promote.
I started to wonder, agetty is started by systemd as a service using the ttyx device and execve(/usr/bin/login) so it will give me login promote, because login is configured with pam_systemd, so a systemd session will be created. But that's not the result I get when I directly run agetty - as I mentioned above, no new session is created when I check systemctl status.
Then I thought if it was because agetty run as normal user, it might check its own EUID or something, but that just cause my bash to exit after I input the username.
Ok, I checked systemctl status again, it told me systemd run this program as /sbin/agetty -o -p -- u --noclear tty2 linux, ok, I login as root on tty2, then run agetty -o -p -- u --noclear - linux, I got exactly the same situation as in the first place —— I was dropped back to bash again.
Could anyone explain to me about these experiment results to me?
If it helps, I'm using ArchLinux, /usr/bin/login and /usr/bin/agetty are both from the util-linux 2.33-2 package.
linux systemd login getty
asked 6 mins ago
炸鱼薯条德里克
399114
I try to call /usr/bin/agetty - from bash in a terminal-emulator(both X-based and Kernel-based), then it asked me to input a username, but after input that username, it just "freeze" a little while, then dropped me back into my original bash promote.
I started to wonder, agetty is started by systemd as a service using the ttyx device and execve(/usr/bin/login) so it will give me login promote, because login is configured with pam_systemd, so a systemd session will be created. But that's not the result I get when I directly run agetty - as I mentioned above, no new session is created when I check systemctl status.
Then I thought if it was because agetty run as normal user, it might check its own EUID or something, but that just cause my bash to exit after I input the username.
Ok, I checked systemctl status again, it told me systemd run this program as /sbin/agetty -o -p -- u --noclear tty2 linux, ok, I login as root on tty2, then run agetty -o -p -- u --noclear - linux, I got exactly the same situation as in the first place —— I was dropped back to bash again.
Could anyone explain to me about these experiment results to me?
If it helps, I'm using ArchLinux, /usr/bin/login and /usr/bin/agetty are both from the util-linux 2.33-2 package.
linux systemd login getty
linux systemd login getty
asked 6 mins ago
炸鱼薯条德里克
399114
asked 6 mins ago
炸鱼薯条德里克
399114
asked 6 mins ago
炸鱼薯条德里克
399114
asked 6 mins ago
炸鱼薯条德里克
399114
asked 6 mins ago
炸鱼薯条德里克
399114
399114
add a comment |
add a comment |
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