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su: Do not change directory/set variables by default, instead add a --login option
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apio 2023-05-11 20:11:09 +02:00
parent a935039e78
commit 1035b91a3d
Signed by: apio
GPG Key ID: B8A7D06E42258954
3 changed files with 11 additions and 4 deletions
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2
apps/login.cpp
View File

@ -38,7 +38,7 @@ Result<int> luna_main(int argc, char** argv)
username = name.view();
}
execl("/bin/su", "login", "-p", "--", username.chars(), nullptr);
execl("/bin/su", "login", "-lp", "--", username.chars(), nullptr);
perror("su");
return 1;

12
apps/su.cpp
View File

@ -55,6 +55,7 @@ Result<int> luna_main(int argc, char** argv)
{
StringView name;
bool prompt_password;
bool login;
if (geteuid() != 0)
{
@ -67,6 +68,7 @@ Result<int> luna_main(int argc, char** argv)
parser.add_system_program_info("su"_sv);
parser.add_positional_argument(name, "name"_sv, "root"_sv);
parser.add_switch_argument(prompt_password, 'p', "prompt", "prompt for a password even if running as root");
parser.add_switch_argument(login, 'l', "login"_sv, "change directory to the user's home and start a login shell");
parser.parse(argc, argv);
struct passwd* entry = getpwnam(name.chars());
@ -93,10 +95,16 @@ Result<int> luna_main(int argc, char** argv)
setgid(entry->pw_gid);
setuid(entry->pw_uid);
chdir(entry->pw_dir);
if (login)
{
chdir(entry->pw_dir);
clearenv();
setenv("PATH", "/bin:/sbin", 1);
}
if (login || entry->pw_uid != 0) setenv("USER", entry->pw_name, 1);
setenv("HOME", entry->pw_dir, 1);
setenv("USER", entry->pw_name, 1);
setenv("SHELL", entry->pw_shell, 1);
execl(entry->pw_shell, entry->pw_shell, NULL);

1
initrd/etc/init/99-login
View File

@ -1,4 +1,3 @@
Name=login
Command=/bin/login
Restart=true
Environment=PATH=/bin:/sbin