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authorJohn Beppu <beppu@lbox.org>1999-12-09 22:10:18 +0000
committerJohn Beppu <beppu@lbox.org>1999-12-09 22:10:18 +0000
commitf95ca97d1bb94307ee0b8ed95d329dc9d6ccec85 (patch)
treec494de94d27e7d8dc8fdd43b1ca8fe6710e15eda /utility.c
parent395b216a2eb70ea2796556c06be01261de993687 (diff)
downloadbusybox-f95ca97d1bb94307ee0b8ed95d329dc9d6ccec85.tar.gz
findInitPid() has been implemented and it seems to work.
reboot has been changed to take advantage of findInitPid();
Diffstat (limited to 'utility.c')
-rw-r--r--utility.c43
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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