findInitPid() has been implemented and it seems to work.

    reboot has been changed to take advantage of findInitPid();


git-svn-id: svn://busybox.net/trunk/busybox@184 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 34 insertions, 9 deletions

diff --git a/utility.c b/utility.c
index de7a0fbfc..42ee00c50 100644
--- a/utility.c
+++ b/utility.c
@@ -1068,14 +1068,39 @@ extern long getNum (const char *cp)
 }
 #endif
 
+#if 1
+/* findInitPid()
+ *  
+ *  This finds the pid of init (which is not always 1).
+ *  Currently, it's implemented by rummaging through the proc filesystem.
+ *
+ *  [return]
+ *  0       failure
+ *  pid     when init's pid is found.
+ */
+extern pid_t
+findInitPid()
+{
+    pid_t   init_pid;
+    char    filename[256];
+    char    buffer[256];
+
+    /* no need to opendir ;) */
+    for (init_pid = 1; init_pid < 65536; init_pid++) {
+        FILE    *status;
+
+        sprintf(filename, "/proc/%d/status", init_pid);
+        status = fopen(filename, "r");
+        if (!status) { continue; }
+        fgets(buffer, 256, status);
+        fclose(status);
+
+        if ( (strcmp(&buffer[6], "init\n") == 0)) {
+            return init_pid;
+        }
+    }
+    return 0;
+}
+#endif
 
 /* END CODE */
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