login: Initialize noauth from login.noauth credential

Let's check if we've been passed credentials by systemd and if so,
try to determine whether we need to auth the user to login from
the login.noauth credential.

diff --git a/login-utils/login.c b/login-utils/login.c
index 74bdf38a424f2795fc785d0e522887c1857f62ca..17b54a7f6393ea5c1871a32e34bb3e56bed2262c 100644 (file)
--- a/login-utils/login.c
+++ b/login-utils/login.c
@@ -46,6 +46,7 @@
 #include <grp.h>
 #include <pwd.h>
 #include <utmpx.h>
+#include <path.h>
 
 #ifdef HAVE_LASTLOG_H
 # include <lastlog.h>
@@ -1287,6 +1288,39 @@ static void __attribute__((__noreturn__)) usage(void)
        exit(EXIT_SUCCESS);
 }
 
+static void load_credentials(struct login_context *cxt) {
+       char *env;
+       DIR *dir;
+       struct dirent *d;
+       struct path_cxt *pc;
+
+       env = safe_getenv("CREDENTIALS_DIRECTORY");
+        if (!env)
+                return;
+
+       pc = ul_new_path("%s", env);
+       if (!pc) {
+               syslog(LOG_WARNING, _("failed to initialize path context"));
+               return;
+       }
+
+       dir = ul_path_opendir(pc, NULL);
+       if (!dir) {
+               syslog(LOG_WARNING, _("failed to open credentials directory"));
+               return;
+       }
+
+       while ((d = xreaddir(dir))) {
+               char *str;
+
+               if (strcmp(d->d_name, "login.noauth") == 0) {
+                       ul_path_read_string(pc, &str, d->d_name);
+                       if (str && strcmp(str, "yes") == 0)
+                               cxt->noauth = 1;
+               }
+       }
+}
+
 static void initialize(int argc, char **argv, struct login_context *cxt)
 {
        int c;
@@ -1318,6 +1352,8 @@ static void initialize(int argc, char **argv, struct login_context *cxt)
        setpriority(PRIO_PROCESS, 0, 0);
        process_title_init(argc, argv);
 
+       load_credentials(cxt);
+
        while ((c = getopt_long(argc, argv, "fHh:pV", longopts, NULL)) != -1)
                switch (c) {
                case 'f':