- markus@cvs.openbsd.org 2001/03/03 23:59:34

     [log.c ssh.c]
     log*.c -> log.c

1 files changed, 201 insertions, 58 deletions

diff --git a/log.c b/log.c
index 7e01384fa..c9c1631c9 100644
--- a/log.c
+++ b/log.c
@@ -10,8 +10,6 @@
  * called by a name other than "ssh" or "Secure Shell".
  */
 /*
- * Shared versions of debug(), log(), etc.
- *
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -36,11 +34,78 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: log.c,v 1.15 2001/01/21 19:05:51 markus Exp $");
+RCSID("$OpenBSD: log.c,v 1.17 2001/03/04 17:42:28 millert Exp $");
 
 #include "log.h"
 #include "xmalloc.h"
 
+#include <syslog.h>
+
+static LogLevel log_level = SYSLOG_LEVEL_INFO;
+static int log_on_stderr = 1;
+static int log_facility = LOG_AUTH;
+static char *argv0;
+
+extern char *__progname;
+
+/* textual representation of log-facilities/levels */
+
+static struct {
+        const char *name;
+        SyslogFacility val;
+} log_facilities[] = {
+        { "DAEMON",     SYSLOG_FACILITY_DAEMON },
+        { "USER",       SYSLOG_FACILITY_USER },
+        { "AUTH",       SYSLOG_FACILITY_AUTH },
+        { "LOCAL0",     SYSLOG_FACILITY_LOCAL0 },
+        { "LOCAL1",     SYSLOG_FACILITY_LOCAL1 },
+        { "LOCAL2",     SYSLOG_FACILITY_LOCAL2 },
+        { "LOCAL3",     SYSLOG_FACILITY_LOCAL3 },
+        { "LOCAL4",     SYSLOG_FACILITY_LOCAL4 },
+        { "LOCAL5",     SYSLOG_FACILITY_LOCAL5 },
+        { "LOCAL6",     SYSLOG_FACILITY_LOCAL6 },
+        { "LOCAL7",     SYSLOG_FACILITY_LOCAL7 },
+        { NULL, 0 }
+};
+
+static struct {
+        const char *name;
+        LogLevel val;
+} log_levels[] =
+{
+        { "QUIET",      SYSLOG_LEVEL_QUIET },
+        { "FATAL",      SYSLOG_LEVEL_FATAL },
+        { "ERROR",      SYSLOG_LEVEL_ERROR },
+        { "INFO",       SYSLOG_LEVEL_INFO },
+        { "VERBOSE",    SYSLOG_LEVEL_VERBOSE },
+        { "DEBUG",      SYSLOG_LEVEL_DEBUG1 },
+        { "DEBUG1",     SYSLOG_LEVEL_DEBUG1 },
+        { "DEBUG2",     SYSLOG_LEVEL_DEBUG2 },
+        { "DEBUG3",     SYSLOG_LEVEL_DEBUG3 },
+        { NULL, 0 }
+};
+
+SyslogFacility
+log_facility_number(char *name)
+{
+        int i;
+        if (name != NULL)
+                for (i = 0; log_facilities[i].name; i++)
+                        if (strcasecmp(log_facilities[i].name, name) == 0)
+                                return log_facilities[i].val;
+        return (SyslogFacility) - 1;
+}
+
+LogLevel
+log_level_number(char *name)
+{
+        int i;
+        if (name != NULL)
+                for (i = 0; log_levels[i].name; i++)
+                        if (strcasecmp(log_levels[i].name, name) == 0)
+                                return log_levels[i].val;
+        return (LogLevel) - 1;
+}
 /* Fatal messages.  This function never returns. */
 
 void
@@ -154,8 +219,8 @@ fatal_remove_cleanup(void (*proc) (void *context), void *context)
                         return;
                 }
         }
-        fatal("fatal_remove_cleanup: no such cleanup function: 0x%lx 0x%lx\n",
-              (u_long) proc, (u_long) context);
+        fatal("fatal_remove_cleanup: no such cleanup function: 0x%lx 0x%lx",
+            (u_long) proc, (u_long) context);
 }
 
 /* Cleanup and exit */
@@ -178,64 +243,142 @@ fatal_cleanup(void)
         exit(255);
 }
 
-/* textual representation of log-facilities/levels */
 
-static struct {
-        const char *name;
-        SyslogFacility val;
-} log_facilities[] = {
-        { "DAEMON",     SYSLOG_FACILITY_DAEMON },
-        { "USER",       SYSLOG_FACILITY_USER },
-        { "AUTH",       SYSLOG_FACILITY_AUTH },
-#ifdef LOG_AUTHPRIV
-        { "AUTHPRIV",   SYSLOG_FACILITY_AUTHPRIV },
-#endif
-        { "LOCAL0",     SYSLOG_FACILITY_LOCAL0 },
-        { "LOCAL1",     SYSLOG_FACILITY_LOCAL1 },
-        { "LOCAL2",     SYSLOG_FACILITY_LOCAL2 },
-        { "LOCAL3",     SYSLOG_FACILITY_LOCAL3 },
-        { "LOCAL4",     SYSLOG_FACILITY_LOCAL4 },
-        { "LOCAL5",     SYSLOG_FACILITY_LOCAL5 },
-        { "LOCAL6",     SYSLOG_FACILITY_LOCAL6 },
-        { "LOCAL7",     SYSLOG_FACILITY_LOCAL7 },
-        { NULL, 0 }
-};
+/*
+ * Initialize the log.
+ */
 
-static struct {
-        const char *name;
-        LogLevel val;
-} log_levels[] =
+void
+log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
 {
-        { "QUIET",      SYSLOG_LEVEL_QUIET },
-        { "FATAL",      SYSLOG_LEVEL_FATAL },
-        { "ERROR",      SYSLOG_LEVEL_ERROR },
-        { "INFO",       SYSLOG_LEVEL_INFO },
-        { "VERBOSE",    SYSLOG_LEVEL_VERBOSE },
-        { "DEBUG",      SYSLOG_LEVEL_DEBUG1 },
-        { "DEBUG1",     SYSLOG_LEVEL_DEBUG1 },
-        { "DEBUG2",     SYSLOG_LEVEL_DEBUG2 },
-        { "DEBUG3",     SYSLOG_LEVEL_DEBUG3 },
-        { NULL, 0 }
-};
+        argv0 = av0;
 
-SyslogFacility
-log_facility_number(char *name)
-{
-        int i;
-        if (name != NULL)
-                for (i = 0; log_facilities[i].name; i++)
-                        if (strcasecmp(log_facilities[i].name, name) == 0)
-                                return log_facilities[i].val;
-        return (SyslogFacility) - 1;
+        switch (level) {
+        case SYSLOG_LEVEL_QUIET:
+        case SYSLOG_LEVEL_FATAL:
+        case SYSLOG_LEVEL_ERROR:
+        case SYSLOG_LEVEL_INFO:
+        case SYSLOG_LEVEL_VERBOSE:
+        case SYSLOG_LEVEL_DEBUG1:
+        case SYSLOG_LEVEL_DEBUG2:
+        case SYSLOG_LEVEL_DEBUG3:
+                log_level = level;
+                break;
+        default:
+                fprintf(stderr, "Unrecognized internal syslog level code %d\n",
+                    (int) level);
+                exit(1);
+        }
+
+        log_on_stderr = on_stderr;
+        if (on_stderr)
+                return;
+
+        switch (facility) {
+        case SYSLOG_FACILITY_DAEMON:
+                log_facility = LOG_DAEMON;
+                break;
+        case SYSLOG_FACILITY_USER:
+                log_facility = LOG_USER;
+                break;
+        case SYSLOG_FACILITY_AUTH:
+                log_facility = LOG_AUTH;
+                break;
+#ifdef LOG_AUTHPRIV             /** BAL: Verify */
+        case SYSLOG_FACILITY_AUTHPRIV
+                log_facility = AUTHPRIV;
+                break
+#endif
+        case SYSLOG_FACILITY_LOCAL0:
+                log_facility = LOG_LOCAL0;
+                break;
+        case SYSLOG_FACILITY_LOCAL1:
+                log_facility = LOG_LOCAL1;
+                break;
+        case SYSLOG_FACILITY_LOCAL2:
+                log_facility = LOG_LOCAL2;
+                break;
+        case SYSLOG_FACILITY_LOCAL3:
+                log_facility = LOG_LOCAL3;
+                break;
+        case SYSLOG_FACILITY_LOCAL4:
+                log_facility = LOG_LOCAL4;
+                break;
+        case SYSLOG_FACILITY_LOCAL5:
+                log_facility = LOG_LOCAL5;
+                break;
+        case SYSLOG_FACILITY_LOCAL6:
+                log_facility = LOG_LOCAL6;
+                break;
+        case SYSLOG_FACILITY_LOCAL7:
+                log_facility = LOG_LOCAL7;
+                break;
+        default:
+                fprintf(stderr,
+                    "Unrecognized internal syslog facility code %d\n",
+                    (int) facility);
+                exit(1);
+        }
 }
 
-LogLevel
-log_level_number(char *name)
+#define MSGBUFSIZ 1024
+
+void
+do_log(LogLevel level, const char *fmt, va_list args)
 {
-        int i;
-        if (name != NULL)
-                for (i = 0; log_levels[i].name; i++)
-                        if (strcasecmp(log_levels[i].name, name) == 0)
-                                return log_levels[i].val;
-        return (LogLevel) - 1;
+        char msgbuf[MSGBUFSIZ];
+        char fmtbuf[MSGBUFSIZ];
+        char *txt = NULL;
+        int pri = LOG_INFO;
+
+        if (level > log_level)
+                return;
+
+        switch (level) {
+        case SYSLOG_LEVEL_FATAL:
+                if (!log_on_stderr)
+                        txt = "fatal";
+                pri = LOG_CRIT;
+                break;
+        case SYSLOG_LEVEL_ERROR:
+                if (!log_on_stderr)
+                        txt = "error";
+                pri = LOG_ERR;
+                break;
+        case SYSLOG_LEVEL_INFO:
+                pri = LOG_INFO;
+                break;
+        case SYSLOG_LEVEL_VERBOSE:
+                pri = LOG_INFO;
+                break;
+        case SYSLOG_LEVEL_DEBUG1:
+                txt = "debug1";
+                pri = LOG_DEBUG;
+                break;
+        case SYSLOG_LEVEL_DEBUG2:
+                txt = "debug2";
+                pri = LOG_DEBUG;
+                break;
+        case SYSLOG_LEVEL_DEBUG3:
+                txt = "debug3";
+                pri = LOG_DEBUG;
+                break;
+        default:
+                txt = "internal error";
+                pri = LOG_ERR;
+                break;
+        }
+        if (txt != NULL) {
+                snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
+                vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
+        } else {
+                vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
+        }
+        if (log_on_stderr) {
+                fprintf(stderr, "%s\r\n", msgbuf);
+        } else {
+                openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
+                syslog(pri, "%.500s", msgbuf);
+                closelog();
+        }
 }