X-Git-Url: http://git.madism.org/?a=blobdiff_plain;ds=sidebyside;f=common.c;h=d3147ffc82c7bdd36a66bc4d12a70838fb8f7253;hb=c78538ac1dd1f22e4b6384b6e85a153646cb90d9;hp=80746ae554b80faef68821938315044211b022a0;hpb=dbc6818c72dfe618b164db970773490b19b808c5;p=apps%2Fpfixtools.git

diff --git a/common.c b/common.c
index 80746ae..d3147ff 100644
--- a/common.c
+++ b/common.c
@@ -40,8 +40,10 @@
 
 #include "common.h"
 
-sig_atomic_t sigint    = false;
-sig_atomic_t sighup    = false;
+sig_atomic_t sigint  = false;
+sig_atomic_t sighup  = false;
+
+static FILE *pidfile = NULL;
 
 void common_sighandler(int sig)
 {
@@ -204,9 +206,52 @@ int drop_privileges(const char *user, const char *group)
     return 0;
 }
 
+int pidfile_open(const char *name)
+{
+    if (name) {
+        pidfile = fopen(name, "w");
+        if (!pidfile)
+            return -1;
+        fprintf(pidfile, "%d\n", getpid());
+        return fflush(pidfile);
+    }
+    return 0;
+}
+
+int pidfile_refresh(void)
+{
+    if (pidfile) {
+        rewind(pidfile);
+        ftruncate(fileno(pidfile), 0);
+        fprintf(pidfile, "%d\n", getpid());
+        return fflush(pidfile);
+    }
+    return 0;
+}
+
+static void pidfile_close(void)
+{
+    if (pidfile) {
+        rewind(pidfile);
+        ftruncate(fileno(pidfile), 0);
+        fclose(pidfile);
+        pidfile = NULL;
+    }
+}
+
 extern initcall_t __madinit[], __madexit[];
 
-void common_initialize(void)
+static void common_shutdown(void)
+{
+    pidfile_close();
+
+    for (int i = -1; __madexit[i]; i--) {
+        (*__madexit[i])();
+    }
+}
+
+static void __attribute__((__constructor__,__used__))
+common_initialize(void)
 {
     if (atexit(common_shutdown)) {
         fputs("Cannot hook my atexit function, quitting !\n", stderr);
@@ -220,9 +265,3 @@ void common_initialize(void)
     }
 }
 
-void common_shutdown(void)
-{
-    for (int i = -1; __madexit[i]; i--) {
-        (*__madexit[i])();
-    }
-}