Add support for global logfile max size and max num. rotated

# Max file size for each log file: 100 kiB, rotate max 4 copies:
    # log => log.1 => log.2.gz => log.3.gz => log.4.gz
    log size=100k count=4

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

src/conf.c

@@ -36,11 +36,15 @@
 #include "service.h"
 #include "tty.h"
 #include "helpers.h"
+#include "util.h"
 
 #define BOOTSTRAP (runlevel == 0)
 #define MATCH_CMD(l, c, x) \
 	(!strncasecmp(l, c, strlen(c)) && (x = (l) + strlen(c)))
 
+int logfile_size_max = 200000;	/* 200 kB */
+int logfile_count_max = 5;
+
 struct rlimit global_rlimit[RLIMIT_NLIMITS];
 
 struct conf_change {
@@ -383,6 +387,26 @@ static void parse_static(char *line)
 		return;
 	}
 
+	if (MATCH_CMD(line, "log ", x)) {
+		char *tok;
+		static int size = 200000, count = 5;
+
+		tok = strtok(x, ":= ");
+		while (tok) {
+			if (!strncmp(tok, "size", 4))
+				size = strtobytes(strtok(NULL, ":= "));
+			else if (!strncmp(tok, "count", 5))
+				count = strtobytes(strtok(NULL, ":= "));
+
+			tok = strtok(NULL, ":= ");
+		}
+
+		if (size > 0)
+			logfile_size_max = size;
+		if (count >= 0)
+			logfile_count_max = count;
+	}
+
 	if (MATCH_CMD(line, "shutdown ", x)) {
 		if (sdown) free(sdown);
 		sdown = strdup(strip_line(x));

src/conf.h

@@ -26,6 +26,9 @@
 
 #include "svc.h"
 
+extern int logfile_size_max;
+extern int logfile_count_max;
+
 extern struct rlimit global_rlimit[];
 
 int   str2rlim(char *str);

src/service.c

@@ -266,7 +266,12 @@ static int service_start(svc_t *svc)
 				sig_unblock();
 
 				if (svc->log.file[0] == '/') {
-					execlp("logit", "logit", "-f", svc->log.file, NULL);
+					char sz[20], num[3];
+
+					snprintf(sz, sizeof(sz), "%d", logfile_size_max);
+					snprintf(num, sizeof(num), "%d", logfile_count_max);
+
+					execlp("logit", "logit", "-f", svc->log.file, "-n", sz, "-r", num, NULL);
 					_exit(0);
 				}