*/
/** \file daemon.c Some helpers for programs that detach from the console. */
-#include "para.h"
-#include "daemon.h"
-#include <pwd.h>
-/* getgrnam() */
-#include <sys/types.h>
+#include <regex.h>
+#include <pwd.h>
+#include <sys/types.h> /* getgrnam() */
#include <grp.h>
+#include "para.h"
+#include "daemon.h"
#include "string.h"
+#include "color.h"
+
+/** The internal state of the daemon. */
+struct daemon {
+ /** See \ref daemon_flags. */
+ unsigned flags;
+ /** Set by \ref daemon_set_logfile(). */
+ char *logfile_name;
+ /** Current loglevel, see \ref daemon_set_loglevel(). */
+ int loglevel;
+
+ /** Used by \ref server_uptime() and \ref uptime_str(). */
+ time_t startuptime;
+ /** The file pointer if the logfile is open. */
+ FILE *logfile;
+ /** Used by para_log() if \p DF_LOG_HOSTNAME is set. */
+ char *hostname;
+ /** Used for colored log messages. */
+ char log_colors[NUM_LOGLEVELS][COLOR_MAXLEN];
+};
+
+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)
+{
+ int i;
+ static const char *default_log_colors[NUM_LOGLEVELS] = {
+ [LL_DEBUG] = "normal",
+ [LL_INFO] = "normal",
+ [LL_NOTICE] = "normal",
+ [LL_WARNING] = "yellow",
+ [LL_ERROR] = "red",
+ [LL_CRIT] = "magenta bold",
+ [LL_EMERG] = "red bold",
+ };
+ for (i = 0; i < NUM_LOGLEVELS; i++) {
+ int ret = color_parse(default_log_colors[i], me->log_colors[i]);
+ assert(ret >= 0);
+ }
+}
+
+/**
+ * Set the color for one loglevel.
+ *
+ * \param arg The loglevel/color specifier.
+ *
+ * \a arg must be of the form "ll:[fg [bg]] [attr]".
+ *
+ * \return 1 On success, -1 on errors.
+ */
+int daemon_set_log_color(char const *arg)
+{
+ char *p = strchr(arg, ':');
+ int ret, ll;
+
+ if (!p)
+ goto err;
+ ret = get_loglevel_by_name(arg);
+ if (ret < 0)
+ goto err;
+ ll = ret;
+ p++;
+ ret = color_parse(p, me->log_colors[ll]);
+ if (ret < 0)
+ goto err;
+ return 1;
+err:
+ PARA_ERROR_LOG("%s: color syntax error\n", arg);
+ return -1;
+
+}
+
+/**
+ * Init or change the name of the log file.
+ *
+ * \param logfile_name The full path of the logfile.
+ */
+void daemon_set_logfile(char *logfile_name)
+{
+ free(me->logfile_name);
+ me->logfile_name = NULL;
+ if (logfile_name)
+ me->logfile_name = para_strdup(logfile_name);
+}
+
+/**
+ * Suppress log messages with severity lower than the given loglevel.
+ *
+ * \param loglevel The smallest level that should be logged.
+ */
+void daemon_set_loglevel(char *loglevel)
+{
+ int ret = get_loglevel_by_name(loglevel);
+
+ assert(ret >= 0);
+ me->loglevel = ret;
+}
+
+/**
+ * Set one of the daemon config flags.
+ *
+ * \param flag The flag to set.
+ *
+ * \sa \ref daemon_flags.
+ */
+void daemon_set_flag(unsigned flag)
+{
+ me->flags |= flag;
+}
+
+/**
+ * Clear one of the daemon config flags.
+ *
+ * \param flag The flag to clear.
+ *
+ * \sa \ref daemon_flags.
+ */
+void daemon_clear_flag(unsigned flag)
+{
+ me->flags &= ~flag;
+}
+
+static unsigned daemon_test_flag(unsigned flag)
+{
+ return me->flags & flag;
+}
/**
* Do the usual stuff to become a daemon.
goto err;
if (chdir("/") < 0)
goto err;
- umask(0);
null = open("/dev/null", O_RDONLY);
if (null < 0)
goto err;
}
/**
- * fopen() the given file in append mode.
- *
- * \param logfile_name The name of the file to open.
- *
- * \return Either calls exit() or returns a valid file handle.
+ * Close the log file of the daemon.
*/
-FILE *open_log(const char *logfile_name)
+void daemon_close_log(void)
{
- FILE *logfile;
-
- assert(logfile_name);
- logfile = fopen(logfile_name, "a");
- if (!logfile) {
- PARA_EMERG_LOG("can not open %s: %s\n", logfile_name,
- strerror(errno));
- exit(EXIT_FAILURE);
- }
- setlinebuf(logfile);
- return logfile;
+ if (!me->logfile)
+ return;
+ PARA_INFO_LOG("closing logfile\n");
+ fclose(me->logfile);
+ me->logfile = NULL;
}
/**
- * Close the log file of the daemon.
+ * fopen() the logfile in append mode.
*
- * \param logfile The log file handle.
- *
- * It's OK to call this with logfile == \p NULL.
+ * \return Either succeeds or exits.
*/
-void close_log(FILE* logfile)
+void daemon_open_log_or_die(void)
{
- if (!logfile)
+ daemon_close_log();
+ if (!me->logfile_name)
return;
- PARA_INFO_LOG("closing logfile\n");
- fclose(logfile);
+ me->logfile = fopen(me->logfile_name, "a");
+ if (!me->logfile) {
+ PARA_EMERG_LOG("can not open %s: %s\n", me->logfile_name,
+ strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+ setlinebuf(me->logfile);
}
/**
* Log the startup message containing the paraslash version.
*/
-void log_welcome(const char *whoami, int loglevel)
+void log_welcome(const char *whoami)
{
PARA_INFO_LOG("welcome to %s " PACKAGE_VERSION " ("BUILD_DATE")\n",
whoami);
- PARA_DEBUG_LOG("using loglevel %d\n", loglevel);
}
/**
exit(EXIT_FAILURE);
}
PARA_INFO_LOG("dropping root privileges\n");
- setuid(p->pw_uid);
+ if (setuid(p->pw_uid) < 0) {
+ PARA_EMERG_LOG("failed to set effective user ID (%s)",
+ strerror(errno));
+ exit(EXIT_FAILURE);
+ }
PARA_DEBUG_LOG("uid: %d, euid: %d\n", (int)getuid(), (int)geteuid());
}
* set_or_get equal to \p UPTIME_GET return the uptime.
* \return Zero if called with \a set_or_get equal to \p UPTIME_SET, the number
- * of seconds ellapsed since the last reset otherwise.
+ * of seconds elapsed since the last reset otherwise.
*
* \sa time(2), difftime(3).
*/
time_t server_uptime(enum uptime set_or_get)
{
- static time_t startuptime;
time_t now;
double diff;
if (set_or_get == UPTIME_SET) {
- time(&startuptime);
+ time(&me->startuptime);
return 0;
}
time(&now);
- diff = difftime(now, startuptime);
+ diff = difftime(now, me->startuptime);
return (time_t) diff;
}
return make_message("%li:%02li:%02li", t / 86400,
(t / 3600) % 24, (t / 60) % 60);
}
+
+/**
+ * The log function for para_server and para_audiod.
+ *
+ * \param ll The log level.
+ * \param fmt The format string describing the log message.
+ */
+__printf_2_3 void para_log(int ll, const char* fmt,...)
+{
+ va_list argp;
+ FILE *fp;
+ struct tm *tm;
+ time_t t1;
+ char *color;
+
+ ll = PARA_MIN(ll, NUM_LOGLEVELS - 1);
+ ll = PARA_MAX(ll, LL_DEBUG);
+ if (ll < me->loglevel)
+ return;
+
+ fp = me->logfile? me->logfile : stderr;
+ color = daemon_test_flag(DF_COLOR_LOG)? me->log_colors[ll] : NULL;
+ if (color)
+ fprintf(fp, "%s", color);
+ if (daemon_test_flag(DF_LOG_TIME)) { /* print date and time */
+ char str[100];
+ time(&t1);
+ tm = localtime(&t1);
+ strftime(str, sizeof(str), "%b %d %H:%M:%S", tm);
+ fprintf(fp, "%s ", str);
+ }
+ if (daemon_test_flag(DF_LOG_HOSTNAME)) {
+ if (!me->hostname)
+ me->hostname = para_hostname();
+ fprintf(fp, "%s ", me->hostname);
+ }
+ if (daemon_test_flag(DF_LOG_LL)) /* log loglevel */
+ fprintf(fp, "(%d) ", ll);
+ if (daemon_test_flag(DF_LOG_PID)) { /* log pid */
+ pid_t mypid = getpid();
+ fprintf(fp, "(%d) ", (int)mypid);
+ }
+ va_start(argp, fmt);
+ vfprintf(fp, fmt, argp);
+ va_end(argp);
+ if (color)
+ fprintf(fp, "%s", COLOR_RESET);
+}
projects / paraslash.git / blobdiff