/*
- * Sherlock Library -- Logging
+ * UCW Library -- Logging
*
- * (c) 1997 Martin Mares, <mj@atrey.karlin.mff.cuni.cz>
+ * (c) 1997--2006 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 <sys/time.h>
+#include <time.h>
+#include <alloca.h>
-#include "lib/lib.h"
-
-static byte *progname = "???";
-static pid_t pid;
+static char log_progname[32];
+char *log_filename;
+char *log_title;
+int log_pid;
+int log_precise_timings;
+void (*log_die_hook)(void);
+void (*log_switch_hook)(struct tm *tm);
-static void
-logit(int level, byte *msg, va_list args)
+void
+vmsg(unsigned int cat, const char *fmt, va_list args)
{
- time_t tim;
- struct tm *tm;
- char buf[32];
+ struct timeval tv;
+ struct tm tm;
+ byte *buf, *p;
+ int buflen = 256;
+ int l, l0, r;
+ va_list args2;
- tim = time(NULL);
- tm = localtime(&tim);
- strftime(buf, sizeof(buf), "%d-%m-%Y %H:%M:%S", tm);
- fprintf(stderr, "%s %s [%d] <%d> ", buf, progname, pid, level);
- vfprintf(stderr, msg, args);
- fputc('\n', stderr);
- fflush(stderr);
+ gettimeofday(&tv, NULL);
+ if (!localtime_r(&tv.tv_sec, &tm))
+ bzero(&tm, sizeof(tm));
+
+ if (log_switch_hook)
+ log_switch_hook(&tm);
+ while (1)
+ {
+ p = buf = alloca(buflen);
+ *p++ = cat;
+ /* We cannot use strftime() here, because it's not re-entrant */
+ p += sprintf(p, " %4d-%02d-%02d %02d:%02d:%02d", tm.tm_year+1900, tm.tm_mon+1, tm.tm_mday,
+ tm.tm_hour, tm.tm_min, tm.tm_sec);
+ if (log_precise_timings)
+ p += sprintf(p, ".%06d", (int)tv.tv_usec);
+ *p++ = ' ';
+ if (log_title)
+ {
+ if (log_pid)
+ p += sprintf(p, "[%s (%d)] ", log_title, log_pid);
+ else
+ p += sprintf(p, "[%s] ", log_title);
+ }
+ else
+ {
+ if (log_pid)
+ p += sprintf(p, "[%d] ", log_pid);
+ }
+ l0 = p - buf + 1;
+ r = buflen - l0;
+ va_copy(args2, args);
+ l = vsnprintf(p, r, fmt, args2);
+ va_end(args2);
+ 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;
+ }
}
void
-log(byte *msg, ...)
+msg(unsigned int cat, const char *fmt, ...)
{
- int level = 2;
va_list args;
- va_start(args, msg);
- if (msg[0] == '<' && msg[1] >= '0' && msg[1] <= '9' && msg[2] == '>')
- {
- level = msg[1] - '0';
- msg += 3;
- }
- logit(level, msg, args);
+ va_start(args, fmt);
+ vmsg(cat, fmt, args);
va_end(args);
}
void
-die(byte *msg, ...)
+die(const char *fmt, ...)
{
va_list args;
- va_start(args, msg);
- logit(9, msg, args);
+ va_start(args, fmt);
+ vmsg(L_FATAL, fmt, args);
va_end(args);
- exit(99);
+ if (log_die_hook)
+ log_die_hook();
+#ifdef DEBUG_DIE_BY_ABORT
+ abort();
+#else
+ exit(1);
+#endif
}
-static byte *
-basename(byte *n)
+void
+assert_failed(const char *assertion, const char *file, int line)
{
- byte *p = n;
-
- while (*n)
- if (*n++ == '/')
- p = n;
- return p;
+ msg(L_FATAL, "Assertion `%s' failed at %s:%d", assertion, file, line);
+ abort();
}
void
-initlog(byte *argv0)
+assert_failed_noinfo(void)
{
- if (argv0)
- progname = basename(argv0);
- pid = getpid();
+ die("Internal error: Assertion failed.");
+}
+
+static const char *
+log_basename(const char *n)
+{
+ const char *p = n;
+
+ while (*n)
+ if (*n++ == '/')
+ p = n;
+ return p;
}
void
-open_log_file(byte *name)
+log_init(const char *argv0)
{
- if (name)
+ if (argv0)
{
- int fd = open(name, O_WRONLY | O_CREAT | O_APPEND, 0666);
- if (fd < 0)
- die("Unable to open log file");
- 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;
}
}