add loglevel.c, document LOGLEVEL setting

1 files changed, 26 insertions, 0 deletions

diff --git a/src/loglevel.c b/src/loglevel.c
new file mode 100644
index 00000000..04de2e46
--- /dev/null
+++ b/src/loglevel.c
@@ -0,0 +1,26 @@
+
+/* Change the default console loglevel */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <linux/unistd.h>
+
+_syscall3(int,syslog,int,type,char *,bufp,int,len);
+
+int main(int argc, char **argv) {
+   int level;
+
+   if (!argv[1]) exit(0);
+   level=atoi(argv[1]);
+   if ( (level<1) || (level>8) ) {
+      fprintf(stderr,"invalid log level %d\n",level);
+      exit(-1);
+   }
+   if (!syslog(8,NULL,level)) {
+      exit(0);
+   } else {
+      perror("syslog");
+      exit(-1);
+   }
+}