Moved to trunk

git-svn-id: file:///home/lennart/svn/public/libdaemon/trunk@38 153bfa13-eec0-0310-be40-b0cb6a0e1b4b

2 files changed, 182 insertions, 0 deletions

diff --git a/examples/Makefile.am b/examples/Makefile.am
new file mode 100644
index 0000000..47c567d
--- /dev/null
+++ b/examples/Makefile.am
@@ -0,0 +1,24 @@
+# $Id$
+#
+# This file is part of libdaemon.
+#
+# libdaemon is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# libdaemon is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with libdaemon; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+
+noinst_PROGRAMS = testd
+
+AM_CPPFLAGS=-I../src
+
+testd_SOURCES=testd.c
+testd_LDADD=../src/libdaemon.la
diff --git a/examples/testd.c b/examples/testd.c
new file mode 100644
index 0000000..12b2940
--- /dev/null
+++ b/examples/testd.c
@@ -0,0 +1,158 @@
+/* $Id$ */
+
+/*
+ * This file is part of libdaemon.
+ *
+ * libdaemon is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * libdaemon is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with libdaemon; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <signal.h>
+#include <errno.h>
+#include <string.h>
+
+#include <dfork.h>
+#include <dsignal.h>
+#include <dlog.h>
+#include <dpid.h>
+
+int main(int argc, char *argv[]) {
+    pid_t pid;
+
+    /* Set indetification string for the daemon for both syslog and PID file */
+    daemon_pid_file_ident = daemon_log_ident = daemon_ident_from_argv0(argv[0]);
+
+    /* Check if we are called with -k parameter */
+    if (argc >= 2 && !strcmp(argv[1], "-k")) {
+        int ret;
+
+        /* Kill daemon with SIGINT */
+        if ((ret = daemon_pid_file_kill(SIGINT)) < 0)
+            daemon_log(LOG_WARNING, "Failed to kill daemon");
+        
+        return ret < 0 ? 1 : 0;
+    }
+
+    /* Check that the daemon is not rung twice a the same time */
+    if ((pid = daemon_pid_file_is_running()) >= 0) {
+        daemon_log(LOG_ERR, "Daemon already running on PID file %u", pid);
+        return 1;
+        
+    }
+
+    /* Prepare for return value passing from the initialization procedure of the daemon process */
+    daemon_retval_init();
+
+    /* Do the fork */
+    if ((pid = daemon_fork()) < 0) {
+
+        /* Exit on error */
+        daemon_retval_done();
+        return 1;
+        
+    } else if (pid) { /* The parent */
+        int ret;
+
+        /* Wait for 20 seconds for the return value passed from the daemon process */
+        if ((ret = daemon_retval_wait(20)) < 0) {
+            daemon_log(LOG_ERR, "Could not recieve return value from daemon process.");
+            return 255;
+        }
+
+        return ret;
+        
+    } else { /* The daemon */
+        int fd, quit = 0;
+        fd_set fds;
+
+        /* Create the PID file */
+        if (daemon_pid_file_create() < 0) {
+            daemon_log(LOG_ERR, "Could not create PID file (%s).", strerror(errno));
+
+            /* Send the error condition to the parent process */
+            daemon_retval_send(1);
+            goto finish;
+        }
+
+        /* Initialize signal handling */
+        if (daemon_signal_init(SIGINT, SIGQUIT, SIGHUP, 0) < 0) {
+            daemon_log(LOG_ERR, "Could not register signal handlers (%s).", strerror(errno));
+            daemon_retval_send(2);
+            goto finish;
+        }
+        
+        /*... do some further init work here */
+
+
+        /* Send OK to parent process */
+        daemon_retval_send(0);
+
+        daemon_log(LOG_INFO, "Sucessfully started");
+
+
+        /* Prepare for select() on the signal fd */
+        FD_ZERO(&fds);
+        FD_SET(fd = daemon_signal_fd(), &fds);
+        
+        while (!quit) {
+            fd_set fds2 = fds;
+
+            /* Wait for an incoming signal */
+            if (select(FD_SETSIZE, &fds2, 0, 0, 0) < 0) {
+
+                /* If we've been interrupted by an incoming signal, continue */
+                if (errno == EINTR)
+                    continue;
+                
+                daemon_log(LOG_ERR, "select(): %s", strerror(errno));
+                break;
+            }
+
+            /* Check if a signal has been recieved */
+            if (FD_ISSET(fd, &fds)) {
+                int sig;
+
+                /* Get signal */
+                if ((sig = daemon_signal_next()) <= 0) {
+                    daemon_log(LOG_ERR, "daemon_signal_next() failed.");
+                    break;
+                }
+
+                /* Dispatch signal */
+                switch (sig) {
+
+                    case SIGINT:
+                    case SIGQUIT:
+                        daemon_log(LOG_WARNING, "Got SIGINT or SIGQUIT");
+                        quit = 1;
+                        break;
+
+                    case SIGHUP:
+                        daemon_log(LOG_INFO, "Got a HUP");
+                        break;
+
+                }
+            }
+        }
+
+        /* Do a cleanup */
+finish:
+        daemon_log(LOG_INFO, "Exiting...");
+
+        daemon_signal_done();
+        daemon_pid_file_remove();
+        
+        return 0;
+    }
+}