commit f6eb09965829fa7a88e1253c71ace6bbfccda59a
parent 92f73a6858a7fd710f8fbcaa31739b81f22deecd
Author: mrgrouse <mrgrouse@mrgrouse.com>
Date: Fri, 17 Jul 2026 15:08:41 -0400
tuilogin.c: login after user inputs correct data, set environment variables, cd to home and exec their shell
Diffstat:
| M | tuilogin.c | | | 34 | +++++++++++++++++++++++++++++++--- |
1 file changed, 31 insertions(+), 3 deletions(-)
diff --git a/tuilogin.c b/tuilogin.c
@@ -5,17 +5,27 @@
/* for writing to file descriptors */
#include <unistd.h>
+/* for getting errors from library functions */
+#include <errno.h>
+
+/* for setting environment variables */
+#include <stdlib.h>
+
/* user & password handling */
#include <sys/types.h>
#include <pwd.h>
-int main()
+/* for initgroups() */
+#include <grp.h>
+
+int main(void)
{
FIELD *field[3];
FORM *login_form;
int row, col;
char user[32];
char password[255];
+ struct passwd *userinfo;
initscr(); /* initialize */
cbreak(); /* fix tty from 'cooked' mode */
@@ -54,18 +64,36 @@ int main()
write(3, "\n", 2);
close(3);
+ /* since we utilize readiness notifs we are just going to error out if there's a bad password/user and rely on the supervision to restart us */
// TODO: error handling if password is wrong
mvgetnstr(prow, pcol, user, 32);
noecho();
mvgetnstr(prow + 2, pcol, password, 255);
+
/* free our forms and fields */
unpost_form(login_form);
free_form(login_form);
free_field(field[0]);
free_field(field[1]);
-
endwin(); /* safely close ncurses */
- return 0;
+ /* getting our password info from the user */
+ errno = 0;
+ userinfo = getpwnam(user);
+ if (userinfo == NULL) {
+ if (errno)
+ printf("getpwnam %s:\n", user);
+ else
+ printf("wrong username.\n");
+ }
+ initgroups(userinfo->pw_name, userinfo->pw_gid);
+ setgid(userinfo->pw_gid);
+ setuid(userinfo->pw_uid);
+
+ setenv("HOME", userinfo->pw_dir, 1);
+ setenv("SHELL", userinfo->pw_shell, 1);
+ chdir(userinfo->pw_dir);
+ execl(userinfo->pw_shell, userinfo->pw_shell, NULL);
+ return errno;
}
