misc: subsys upgrade, log timestamps

(log)
 - create LOGLEVEL constant numbers
 - implement CONSOLE_LOGLEVEL
 - color array now uses loglevel constants
 - timestamp now shown (thanks util-linux)
(init)
 - register mainpid
 - hello world print
 - fix process reaper to refer to subsys when reaping
(subsys)
 - create maximum subsystem count
 - create subsystem table
 - add debugging prints to subsystem entry and termination
 - create function to handle process termination (unmap stack, free
   subsystem malloc, clear entry in table)
 - disable subsystem inception
 - change die references to fail with print
 - supply clone with signal to send on termination (SIGCHLD)

1 files changed, 23 insertions, 10 deletions

diff --git a/init/log.c b/init/log.c
index d3bcbe4..eb2cd09 100644
--- a/init/log.c
+++ b/init/log.c
@@ -2,32 +2,38 @@
 #include <stdio.h>
 #include <string.h>
 #include <sys/file.h>
+#include <sys/time.h>
 #include <unistd.h>
 
 #include <log.h>
 #include <util.h>
 
 static const char *colors[] = {
-    [0] = ANSI_BLINK ANSI_REVERSE ANSI_BOLD ANSI_RED,
-    [1] = ANSI_REVERSE ANSI_BOLD ANSI_RED,
-    [2] = ANSI_BOLD ANSI_RED,
-    [3] = ANSI_RED,
-    [4] = ANSI_BOLD,
-    [5] = ANSI_BRIGHT_WHITE,
-    [6] = ANSI_RESET,
-    [7] = ANSI_ITALIC ANSI_BRIGHT_BLUE,
+    [EMERG_LOGLEVEL] = ANSI_BLINK ANSI_REVERSE ANSI_BOLD ANSI_RED,
+    [ALERT_LOGLEVEL] = ANSI_REVERSE ANSI_BOLD ANSI_RED,
+    [CRIT_LOGLEVEL] = ANSI_BOLD ANSI_RED,
+    [ERR_LOGLEVEL] = ANSI_RED,
+    [WARNING_LOGLEVEL] = ANSI_BOLD,
+    [NOTICE_LOGLEVEL] = ANSI_BRIGHT_WHITE,
+    [INFO_LOGLEVEL] = ANSI_RESET,
+    [DEBUG_LOGLEVEL] = ANSI_ITALIC ANSI_BRIGHT_BLUE,
 };
 
+int start_time = 0;
 int console_lock = 0;
 
 int print(const char *fmt, ...)
 {
-    int loglevel = 5;
+    int loglevel = DEFAULT_LOGLEVEL;
     if(fmt[0] == LOG_SOH_ASCII) {
         loglevel = (fmt[1] - 0x30) % 10;
         fmt += 2;
     }
 
+    /* not going to be printed? dont bother! */
+    if(loglevel > CONSOLE_LOGLEVEL)
+        return 0;
+
     /* we essentially print the user's raw input to its own buffer,
        later we will parse it and print out ANSI colors and what not */
     char buf[512];
@@ -44,6 +50,11 @@ int print(const char *fmt, ...)
             break;
     }
 
+    char tsbuf[64] = "\0";
+    struct timeval time;
+    gettimeofday(&time, NULL);
+    snprintf(tsbuf, sizeof(tsbuf), "[%5ld.%06ld] ", (long)time.tv_sec % 100000, (long)time.tv_usec);
+
     /* spin lock, at the cost of architecture portability
        concurrency is something that we need to adjust for, and the
        console will be scrambled and unreadable if we allow writing all
@@ -58,8 +69,10 @@ int print(const char *fmt, ...)
 
     /* we want to support stuff without colons, but frankly I havent
        tested this at time of writing. will find out later */
+    writeputs(ANSI_RESET ANSI_GREEN);
+    writeputs(tsbuf);
+    writeputs(ANSI_RESET);
     if(buf[colon] == ':') {
-        writeputs(ANSI_RESET);
         writeputs(colors[loglevel]);
         writeputs(ANSI_YELLOW);
         write(STDOUT_FILENO, buf, colon);