Copy the hostname from iOS to Linux sometimes

Sekedo664 · Jan 16, 2022 · 1089f0d · 1089f0d
1 parent 1aaf48f
commit 1089f0d
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Showing 3 changed files with 33 additions and 6 deletions.
diff --git a/app/AppDelegate.m b/app/AppDelegate.m
@@ -162,12 +162,7 @@ - (int)boot {
     task_start(current);
 
 #else
-    if (strchr(root.fileSystemRepresentation, '"') != NULL) {
-        NSLog(@"can't deal with double quote in rootfs path");
-        return _EINVAL;
-    }
-    NSArray<NSString *> *args = @[
-    ];
+    NSArray<NSString *> *args = @[];
     actuate_kernel([args componentsJoinedByString:@" "].UTF8String);
 #endif
 
@@ -178,6 +173,15 @@ - (int)boot {
 const char *DefaultRootPath() {
     return [Roots.instance rootUrl:Roots.instance.defaultRoot].fileSystemRepresentation;
 }
+
+void SyncHostname(void) {
+    async_do_in_workqueue(^{
+        char hostname[256];
+        if (gethostname(hostname, sizeof(hostname)) < 0)
+            return;
+        linux_sethostname(hostname);
+    });
+}
 #endif
 
 - (void)configureDns {
@@ -251,6 +255,12 @@ - (BOOL)application:(UIApplication *)application willFinishLaunchingWithOptions:
         return YES;
 
     bootError = [self boot];
+
+    [NSNotificationCenter.defaultCenter addObserverForName:UIApplicationWillEnterForegroundNotification object:UIApplication.sharedApplication queue:nil usingBlock:^(NSNotification * _Nonnull note) {
+        SyncHostname();
+    }];
+    SyncHostname();
+
     return YES;
 }
 

diff --git a/app/LinuxInterop.c b/app/LinuxInterop.c
@@ -18,6 +18,7 @@
 #include <linux/file.h>
 #include <linux/umh.h>
 #include <linux/syscalls.h>
+#include <linux/utsname.h>
 #include <asm/irq.h>
 #include <user/fs.h>
 #include <user/irq.h>
@@ -146,3 +147,17 @@ void start_session(const char *exe, const char *const *argv, const char *const *
     if (err < 0)
         done(err, 0, NULL);
 }
+
+void linux_sethostname(const char *hostname) {
+    int len = strlen(hostname);
+    if (len > __NEW_UTS_LEN)
+        len = __NEW_UTS_LEN;
+    down_write(&uts_sem);
+    struct new_utsname *u = utsname();
+    if (strncmp(u->nodename, hostname, len) != 0) {
+        memcpy(u->nodename, hostname, len);
+        memset(u->nodename + len, 0, sizeof(u->nodename) - len);
+        uts_proc_notify(UTS_PROC_HOSTNAME);
+    }
+    up_write(&uts_sem);
+}
diff --git a/app/LinuxInterop.h b/app/LinuxInterop.h
@@ -46,6 +46,8 @@ struct file *ios_pty_open(nsobj_t *terminal_out);
 typedef void (^StartSessionDoneBlock)(int retval, int pid, nsobj_t terminal);
 void start_session(const char *exe, const char *const *argv, const char *const *envp, StartSessionDoneBlock done);
 
+void linux_sethostname(const char *hostname);
+
 nsobj_t Terminal_terminalWithType_number(int type, int number);
 void Terminal_setLinuxTTY(nsobj_t _self, struct linux_tty *tty);
 int Terminal_sendOutput_length(nsobj_t _self, const char *data, int size);