X-Git-Url: http://git.madism.org/?a=blobdiff_plain;f=daemon.c;h=ebda9671ddebed14381f23a890f05f036ab686b9;hb=1ff926eac33152aee930a454ac1d3dec6e6e5faf;hp=ec8be6590a36f25062ad655a57a175a385065e71;hpb=c0cfcd4c414bd423e4766ff6c90850ee25c9b449;p=apps%2Fpfixtools.git

diff --git a/daemon.c b/daemon.c
index ec8be65..ebda967 100644
--- a/daemon.c
+++ b/daemon.c
@@ -1,5 +1,5 @@
 /******************************************************************************/
-/*          postlicyd: a postfix policy daemon with a lot of features         */
+/*          pfixtools: a collection of postfix related tools                  */
 /*          ~~~~~~~~~                                                         */
 /*  ________________________________________________________________________  */
 /*                                                                            */
@@ -33,12 +33,33 @@
  * Copyright © 2007 Pierre Habouzit
  */
 
+#include <fcntl.h>
+#include <grp.h>
+#include <pwd.h>
 #include <sys/un.h>
 
-#include "postlicyd.h"
+#include "common.h"
 #include "daemon.h"
 
-int tcp_listen(const struct sockaddr *addr, socklen_t len)
+static int setnonblock(int sock)
+{
+    int res = fcntl(sock, F_GETFL);
+
+    if (res < 0) {
+        UNIXERR("fcntl");
+        return -1;
+    }
+
+    if (fcntl(sock, F_SETFL, res | O_NONBLOCK) < 0) {
+        UNIXERR("fcntl");
+        return -1;
+    }
+
+    return 0;
+}
+
+
+int tcp_listen_nonblock(const struct sockaddr *addr, socklen_t len)
 {
     int sock;
 
@@ -78,6 +99,11 @@ int tcp_listen(const struct sockaddr *addr, socklen_t len)
         return -1;
     }
 
+    if (setnonblock(sock)) {
+        close(sock);
+        return -1;
+    }
+
     if (listen(sock, 0) < 0) {
         UNIXERR("bind");
         close(sock);
@@ -87,3 +113,66 @@ int tcp_listen(const struct sockaddr *addr, socklen_t len)
     return sock;
 }
 
+int accept_nonblock(int fd)
+{
+    int sock = accept(fd, NULL, 0);
+
+    if (sock < 0) {
+        UNIXERR("accept");
+        return -1;
+    }
+
+    if (setnonblock(sock)) {
+        close(sock);
+        return -1;
+    }
+
+    return sock;
+}
+
+int daemon_detach(void)
+{
+    pid_t pid;
+
+    close(STDIN_FILENO);
+    close(STDOUT_FILENO);
+    close(STDERR_FILENO);
+
+    open("/dev/null", O_RDWR);
+    open("/dev/null", O_RDWR);
+    open("/dev/null", O_RDWR);
+
+    pid = fork();
+    if (pid < 0)
+        return -1;
+    if (pid)
+        exit(0);
+
+    setsid();
+    return 0;
+}
+
+int drop_privileges(const char *user, const char *group)
+{
+    if (!geteuid()) {
+        struct passwd *pw;
+        struct group *gr;
+
+        if (group) {
+            gr = getgrnam(group);
+            if (!gr)
+                return -1;
+            setgid(gr->gr_gid);
+        }
+
+        pw = getpwnam(user);
+        if (!pw)
+            return -1;
+        if (!group) {
+            setgid(pw->pw_gid);
+        }
+        setuid(pw->pw_uid);
+    }
+
+    return 0;
+}