Implement logfile and daemon mode.

diff --git a/daemon.c b/daemon.c
index ba890fb5bb40e5e452d843361bebae2396ad0288..e9cf7b056d674a00e10a7b4efef0eef64331361f 100644 (file)
--- a/daemon.c
+++ b/daemon.c
@@ -108,8 +108,3 @@ void log_welcome(int loglevel)
        DSS_INFO_LOG("***** welcome to dss ******\n");
        DSS_DEBUG_LOG("using loglevel %d\n", loglevel);
 }
-
-int com_daemon(int argc, char * const * argv)
-{
-       return 1;
-}

diff --git a/daemon.h b/daemon.h
new file mode 100644 (file)
index 0000000..aead8e8
--- /dev/null
+++ b/daemon.h
@@ -0,0 +1,7 @@
+
+/** \file daemon.h exported symbols from daemon.c */
+
+void daemon_init(void);
+FILE *open_log(const char *logfile_name);
+void close_log(FILE* logfile);
+void log_welcome(int loglevel);

diff --git a/dss.c b/dss.c
index bda603e5419b079f4709044a3c04ab0e5901ddf1..b619f7d8ffb53909d96bead3f92aff5e4a75f90e 100644 (file)
--- a/dss.c
+++ b/dss.c
@@ -22,10 +22,12 @@
 #include "error.h"
 #include "fd.h"
 #include "exec.h"
+#include "daemon.h"
 
 
 struct gengetopt_args_info conf;
 char *dss_error_txt = NULL;
+static FILE *logfile;
 
 DEFINE_DSS_ERRLIST;
 
@@ -68,6 +70,37 @@ struct snapshot {
        unsigned interval;
 };
 
+__printf_2_3 void dss_log(int ll, const char* fmt,...)
+{
+       va_list argp;
+       FILE *outfd;
+       struct tm *tm;
+       time_t t1;
+       char str[255] = "";
+
+       if (ll < conf.loglevel_arg)
+               return;
+       outfd = logfile? logfile : stderr;
+       time(&t1);
+       tm = localtime(&t1);
+       strftime(str, sizeof(str), "%b %d %H:%M:%S", tm);
+       fprintf(outfd, "%s ", str);
+       if (conf.loglevel_arg <= INFO)
+               fprintf(outfd, "%i: ", ll);
+       va_start(argp, fmt);
+       vfprintf(outfd, fmt, argp);
+       va_end(argp);
+}
+
+__printf_1_2 void msg(const char* fmt,...)
+{
+       FILE *outfd = conf.daemon_given? logfile : stdout;
+       va_list argp;
+       va_start(argp, fmt);
+       vfprintf(outfd, fmt, argp);
+       va_end(argp);
+}
+
 int is_snapshot(const char *dirname, int64_t now, struct snapshot *s)
 {
        int i, ret;
@@ -357,7 +390,7 @@ int remove_redundant_snapshot(struct snapshot_list *sl,
                }
                assert(victim);
                if (dry_run) {
-                       printf("%s would be removed (interval = %i)\n",
+                       msg("%s would be removed (interval = %i)\n",
                                victim->name, victim->interval);
                        continue;
                }
@@ -378,7 +411,7 @@ int remove_old_snapshot(struct snapshot_list *sl, int dry_run, pid_t *pid)
                if (s->interval <= conf.num_intervals_arg)
                        continue;
                if (dry_run) {
-                       printf("%s would be removed (interval = %i)\n",
+                       msg("%s would be removed (interval = %i)\n",
                                s->name, s->interval);
                        continue;
                }
@@ -589,7 +622,7 @@ int com_ls(void)
        struct snapshot *s;
        get_snapshot_list(&sl);
        FOR_EACH_SNAPSHOT(s, i, &sl)
-               printf("%u\t%s\n", s->interval, s->name);
+               msg("%u\t%s\n", s->interval, s->name);
        free_snapshot_list(&sl);
        return 1;
 }
@@ -602,16 +635,6 @@ __noreturn void clean_exit(int status)
        exit(status);
 }
 
-__printf_2_3 void dss_log(int ll, const char* fmt,...)
-{
-       va_list argp;
-       if (ll < conf.loglevel_arg)
-               return;
-       va_start(argp, fmt);
-       vfprintf(stderr, fmt, argp);
-       va_end(argp);
-}
-
 int read_config_file(void)
 {
        int ret;
@@ -682,6 +705,12 @@ int main(int argc, char **argv)
        ret = check_config();
        if (ret < 0)
                goto out;
+       if (conf.logfile_given) {
+               logfile = open_log(conf.logfile_arg);
+               log_welcome(conf.loglevel_arg);
+       }
+       if (conf.daemon_given)
+               daemon_init();
        ret = dss_chdir(conf.dest_dir_arg);
        if (ret < 0)
                goto out;

diff --git a/dss.ggo b/dss.ggo
index 9af79d7b39217087580216483a1e4d2ec431b7d5..70f6434f9df27eafed85c4f6d4db5e2f9d871c64 100644 (file)
--- a/dss.ggo
+++ b/dss.ggo
@@ -31,6 +31,15 @@ option "logfile" -
        string typestr="filename"
        optional
 
+option "daemon" d
+#~~~~~~~~~~~~~~~~
+"run as background daemon"
+flag off
+dependon="logfile"
+details="
+       Note that dsss refuses to start in daemon mode if no logfile
+       was specified.
+"
 
 defgroup "command"
 #=================