- obj_parse_dump() generalized to store apart the header and the body, and

[libucw.git] / lib / log.c

diff --git a/lib/log.c b/lib/log.c
index 16fe4e227f2ef574111953b836075df70fe858f7..cad127f47bb241a1ab7fb2c850ff046c24879226 100644 (file)
--- a/lib/log.c
+++ b/lib/log.c
@@ -1,60 +1,84 @@
 /*
  *     Sherlock Library -- Logging
  *
- *     (c) 1997--2001 Martin Mares <mj@ucw.cz>
+ *     (c) 1997--2004 Martin Mares <mj@ucw.cz>
+ *
+ *     This software may be freely distributed and used according to the terms
+ *     of the GNU Lesser General Public License.
  */
 
 #include "lib/lib.h"
 
 #include <stdio.h>
 #include <stdlib.h>
-#include <stdarg.h>
-#include <fcntl.h>
+#include <string.h>
 #include <unistd.h>
 #include <time.h>
+#include <alloca.h>
 
-static char *log_progname;
-static pid_t log_pid;
+static char log_progname[32];
+char *log_filename;
+char *log_title;
+int log_pid;
+void (*log_die_hook)(void);
+void (*log_switch_hook)(struct tm *tm);
 
 void
-log_fork(void)
-{
-  log_pid = getpid();
-}
-
-static void
-vlog(unsigned int cat, const char *msg, va_list args)
+vlog_msg(unsigned int cat, const char *msg, va_list args)
 {
   time_t tim = time(NULL);
   struct tm *tm = localtime(&tim);
-  char buf[32];
+  byte *buf, *p;
+  int buflen = 256;
+  int l, l0, r;
 
-  strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm);
-  fprintf(stderr, "%c %s ", cat, buf);
-  if (log_progname)
+  if (log_switch_hook)
+    log_switch_hook(tm);
+  while (1)
     {
-      if (log_pid)
-       fprintf(stderr, "[%s (%d)] ", log_progname, log_pid);
+      p = buf = alloca(buflen);
+      *p++ = cat;
+      p += strftime(p, buflen, " %Y-%m-%d %H:%M:%S ", tm);
+      if (log_title)
+       {
+         if (log_pid)
+           p += sprintf(p, "[%s (%d)] ", log_title, log_pid);
+         else
+           p += sprintf(p, "[%s] ", log_title);
+       }
       else
-       fprintf(stderr, "[%s] ", log_progname);
+       {
+         if (log_pid)
+           p += sprintf(p, "[%d] ", log_pid);
+       }
+      l0 = p - buf + 1;
+      r = buflen - l0;
+      l = vsnprintf(p, r, msg, args);
+      if (l < 0)
+       l = r;
+      else if (l < r)
+       {
+         while (*p)
+           {
+             if (*p < 0x20 && *p != '\t')
+               *p = 0x7f;
+             p++;
+           }
+         *p = '\n';
+         write(2, buf, l + l0);
+         return;
+       }
+      buflen = l + l0 + 1;
     }
-  else
-    {
-      if (log_pid)
-       fprintf(stderr, "[%d] ", log_pid);
-    }
-  vfprintf(stderr, msg, args);
-  fputc('\n', stderr);
-  fflush(stderr);
 }
 
 void
-log(unsigned int cat, const char *msg, ...)
+log_msg(unsigned int cat, const char *msg, ...)
 {
   va_list args;
 
   va_start(args, msg);
-  vlog(cat, msg, args);
+  vlog_msg(cat, msg, args);
   va_end(args);
 }
 
@@ -64,19 +88,40 @@ die(byte *msg, ...)
   va_list args;
 
   va_start(args, msg);
-  vlog(L_FATAL, msg, args);
+  vlog_msg(L_FATAL, msg, args);
   va_end(args);
+  if (log_die_hook)
+    log_die_hook();
+#ifdef DEBUG_DIE_BY_ABORT
+  abort();
+#else
   exit(1);
+#endif
 }
 
+#ifdef DEBUG
+void
+assert_failed(char *assertion, char *file, int line)
+{
+  log(L_FATAL, "Assertion `%s' failed at %s:%d", assertion, file, line);
+  abort();
+}
+#else
+void
+assert_failed(void)
+{
+  die("Internal error: Assertion failed.");
+}
+#endif
+
 static byte *
-basename(byte *n)
+log_basename(byte *n)
 {
   byte *p = n;
 
   while (*n)
-       if (*n++ == '/')
-         p = n;
+    if (*n++ == '/')
+      p = n;
   return p;
 }
 
@@ -84,19 +129,9 @@ void
 log_init(byte *argv0)
 {
   if (argv0)
-    log_progname = basename(argv0);
-}
-
-void
-log_file(byte *name)
-{
-  if (name)
     {
-      int fd = open(name, O_WRONLY | O_CREAT | O_APPEND, 0666);
-      if (fd < 0)
-       die("Unable to open log file %s: %m", name);
-      close(2);
-      dup(fd);
-      close(fd);
+      strncpy(log_progname, log_basename(argv0), sizeof(log_progname)-1);
+      log_progname[sizeof(log_progname)-1] = 0;
+      log_title = log_progname;
     }
 }