Remove support for compile-time loglevel.

[paraslash.git] / daemon.c

diff --git a/daemon.c b/daemon.c
index d8b8519e42cbf20f32bdcde30055a807793e8c7a..478b0f47acc94d3098cc17576599032f007b43ca 100644 (file)
--- a/daemon.c
+++ b/daemon.c
@@ -11,6 +11,7 @@
 #include <sys/types.h> /* getgrnam() */
 #include <grp.h>
 #include <signal.h>
+#include <sys/resource.h>
 
 #include "para.h"
 #include "daemon.h"
@@ -37,12 +38,7 @@ struct daemon {
 
 static struct daemon the_daemon, *me = &the_daemon;
 
-/**
- * Activate default log colors.
- *
- * This should be called early if color support is wanted.
- */
-void daemon_set_default_log_colors(void)
+static void daemon_set_default_log_colors(void)
 {
        int i;
        static const char *default_log_colors[NUM_LOGLEVELS] = {
@@ -58,14 +54,12 @@ void daemon_set_default_log_colors(void)
                color_parse_or_die(default_log_colors[i], me->log_colors[i]);
 }
 
-/**
+/*
  * Set the color for one loglevel.
  *
- * \param arg The loglevel/color specifier.
- *
- * \a arg must be of the form "ll:[fg [bg]] [attr]".
+ * arg must be of the form "ll:[fg [bg]] [attr]".
  */
-void daemon_set_log_color_or_die(char const *arg)
+static void daemon_set_log_color_or_die(char const *arg)
 {
        char *p = strchr(arg, ':');
        int ret, ll;
@@ -84,6 +78,45 @@ err:
        exit(EXIT_FAILURE);
 }
 
+/**
+ * Initialize color mode if necessary.
+ *
+ * \param color_arg The argument given to --color.
+ * \param color_arg_auto The value for automatic color detection.
+ * \param color_arg_no The value to disable colored log messages.
+ * \param logfile_given In auto mode colors are disabled if this value is true.
+ * \param log_color_argv Color specifiers given to --log-color.
+ * \param argc Number of color specifiers in \a log_color_argv.
+ *
+ * If \a color_arg equals \a color_arg_no, color mode is disabled, i.e., calls
+ * to \a para_log() will not produce colored output. If \a color_arg == \a
+ * color_arg_auto, the function autodetects whether to activate colors.
+ * Otherwise color mode is enabled.
+ *
+ * If color mode is to be enabled, the strings in \a log_color_argv are parsed
+ * and the color scheme is updated accordingly. For each loglevel, the default
+ * colors apply if there is no log_color_argv for this loglevel.
+ */
+void daemon_init_colors_or_die(int color_arg, int color_arg_auto,
+               int color_arg_no, bool logfile_given, char **log_color_argv,
+               int argc)
+{
+       int i;
+
+       if (color_arg == color_arg_no)
+               return;
+       if (color_arg == color_arg_auto) {
+               if (logfile_given)
+                       return;
+               if (!isatty(STDERR_FILENO))
+                       return;
+       }
+       daemon_set_flag(DF_COLOR_LOG);
+       daemon_set_default_log_colors();
+       for (i = 0; i < argc; i++)
+               daemon_set_log_color_or_die(log_color_argv[i]);
+}
+
 /**
  * Init or change the name of the log file.
  *
@@ -167,7 +200,7 @@ void daemonize(bool parent_waits)
                goto err;
        if (chdir("/") < 0)
                goto err;
-       null = open("/dev/null", O_RDONLY);
+       null = open("/dev/null", O_RDWR);
        if (null < 0)
                goto err;
        if (dup2(null, STDIN_FILENO) < 0)
@@ -217,11 +250,30 @@ void daemon_open_log_or_die(void)
 
 /**
  * Log the startup message containing the paraslash version.
+ *
+ * \param name The name of the executable.
+ *
+ * First the given \a name is prefixed with the string "para_". Next the git
+ * version is appended. The resulting string is logged with priority "INFO".
+ */
+void daemon_log_welcome(const char *name)
+{
+       PARA_INFO_LOG("welcome to para_%s-" PACKAGE_VERSION " \n", name);
+}
+
+/**
+ * Renice the calling process.
+ *
+ * \param prio The priority value to set.
+ *
+ * Errors are not considered fatal, but a warning message is logged if the
+ * underlying call to setpriority(2) fails.
  */
-void daemon_log_welcome(const char *whoami)
+void daemon_set_priority(int prio)
 {
-       PARA_INFO_LOG("welcome to %s " PACKAGE_VERSION " ("BUILD_DATE")\n",
-               whoami);
+       if (setpriority(PRIO_PROCESS, 0, prio) < 0)
+               PARA_WARNING_LOG("could not set priority to %d: %s\n", prio,
+                       strerror(errno));
 }
 
 /**