Logging: fix errno decodes

[user/henk/code/exim.git] / src / src / log.c

diff --git a/src/src/log.c b/src/src/log.c
index b2d1fcfc1c5280e06464db6589d7eb4fc502d445..032eb876f205099888597450168df2fca5364145 100644 (file)
--- a/src/src/log.c
+++ b/src/src/log.c
@@ -2,7 +2,7 @@
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
-/* Copyright (c) University of Cambridge 1995 - 2015 */
+/* Copyright (c) University of Cambridge 1995 - 2016 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 /* Functions for writing log files. The code for maintaining datestamped
@@ -48,7 +48,77 @@ static int    logging_mode = LOG_MODE_FILE;
 static uschar *file_path = US"";
 
 
-
+/* These should be kept in-step with the private delivery error
+number definitions in macros.h */
+
+static const uschar * exim_errstrings[] = {
+  US"",
+  US"unknown error",
+  US"user slash",
+  US"exist race",
+  US"not regular",
+  US"not directory",
+  US"bad ugid",
+  US"bad mode",
+  US"inode changed",
+  US"lock failed",
+  US"bad address2",
+  US"forbid pipe",
+  US"forbid file",
+  US"forbid reply",
+  US"missing pipe",
+  US"missing file",
+  US"missing reply",
+  US"bad redirect",
+  US"smtp closed",
+  US"smtp format",
+  US"spool format",
+  US"not absolute",
+  US"Exim-imposed quota",
+  US"held",
+  US"Delivery filter process failure",
+  US"Delivery add/remove header failure",
+  US"Delivery write incomplete error",
+  US"Some expansion failed",
+  US"Failed to get gid",
+  US"Failed to get uid",
+  US"Unset or non-existent transport",
+  US"MBX length mismatch",
+  US"Lookup failed routing or in smtp tpt",
+  US"Can't match format in appendfile",
+  US"Creation outside home in appendfile",
+  US"Can't check a list; lookup defer",
+  US"DNS lookup defer",
+  US"Failed to start TLS session",
+  US"Mandatory TLS session not started",
+  US"Failed to chown a file",
+  US"Failed to create a pipe",
+  US"When verifying",
+  US"When required by client",
+  US"Used internally in smtp transport",
+  US"RCPT gave 4xx error",
+  US"MAIL gave 4xx error",
+  US"DATA gave 4xx error",
+  US"Negotiation failed for proxy configured host",
+  US"Authenticator 'other' failure",
+  US"target not supporting SMTPUTF8",
+  US"",
+
+  US"Not time for routing",
+  US"Not time for local delivery",
+  US"Not time for any remote host",
+  US"Local-only delivery",
+  US"Domain in queue_domains",
+  US"Transport concurrency limit",
+};
+
+
+/************************************************/
+const uschar *
+exim_errstr(int err)
+{
+return err < 0 ? exim_errstrings[-err] : CUS strerror(err);
+}
 
 /*************************************************
 *              Write to syslog                   *
@@ -420,12 +490,9 @@ log. If possible, save a copy of the original line that was being logged. If we
 are recursing (can't open the panic log either), the pointer will already be
 set. */
 
-if (panic_save_buffer == NULL)
-  {
-  panic_save_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
-  if (panic_save_buffer != NULL)
+if (!panic_save_buffer)
+  if ((panic_save_buffer = US malloc(LOG_BUFFER_SIZE)))
     memcpy(panic_save_buffer, log_buffer, LOG_BUFFER_SIZE);
-  }
 
 log_write(0, LOG_PANIC_DIE, "Cannot open %s log file \"%s\": %s: "
   "euid=%d egid=%d", log_names[type], buffer, strerror(errno), euid, getegid());
@@ -433,6 +500,13 @@ log_write(0, LOG_PANIC_DIE, "Cannot open %s log file \"%s\": %s: "
 }
 
 
+static void
+unlink_log(int type)
+{
+if (type == lt_debug) unlink(CS debuglog_name);
+}
+
+
 
 /*************************************************
 *     Add configuration file info to log line    *
@@ -498,12 +572,9 @@ log_write_failed(uschar *name, int length, int rc)
 {
 int save_errno = errno;
 
-if (panic_save_buffer == NULL)
-  {
-  panic_save_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
-  if (panic_save_buffer != NULL)
+if (!panic_save_buffer)
+  if ((panic_save_buffer = US malloc(LOG_BUFFER_SIZE)))
     memcpy(panic_save_buffer, log_buffer, LOG_BUFFER_SIZE);
-  }
 
 log_write(0, LOG_PANIC_DIE, "failed to write to %s: length=%d result=%d "
   "errno=%d (%s)", name, length, rc, save_errno,
@@ -659,15 +730,12 @@ if (panic_recurseflag)
 /* Ensure we have a buffer (see comment above); this should never be obeyed
 when running Exim proper, only when running utilities. */
 
-if (log_buffer == NULL)
-  {
-  log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
-  if (log_buffer == NULL)
+if (!log_buffer)
+  if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
     {
     fprintf(stderr, "exim: failed to get store for log buffer\n");
     exim_exit(EXIT_FAILURE);
     }
-  }
 
 /* If we haven't already done so, inspect the setting of log_file_path to
 determine whether to log to files and/or to syslog. Bits in logging_mode
@@ -753,8 +821,8 @@ DEBUG(D_any|D_v)
 
   for (i = 0; i < log_options_count; i++)
     {
-    unsigned int bit = log_options[i].bit;
-    if (bit < BITWORDSIZE && selector == BIT(bit))
+    unsigned int bitnum = log_options[i].bit;
+    if (bitnum < BITWORDSIZE && selector == BIT(bitnum))
       {
       *ptr++ = ' ';
       Ustrcpy(ptr, log_options[i].name);
@@ -1325,7 +1393,7 @@ int fd = -1;
 if (debug_file)
   {
   debug_printf("DEBUGGING ACTIVATED FROM WITHIN CONFIG.\n"
-      "DEBUG: Tag=\"%s\" Opts=\"%s\"\n", tag_name, opts ? opts : US"");
+      "DEBUG: Tag=\"%s\" opts=\"%s\"\n", tag_name, opts ? opts : US"");
   return;
   }
 
@@ -1356,4 +1424,16 @@ else
 }
 
 
+void
+debug_logging_stop(void)
+{
+if (!debug_file || !debuglog_name[0]) return;
+
+debug_selector = 0;
+fclose(debug_file);
+debug_file = NULL;
+unlink_log(lt_debug);
+}
+
+
 /* End of log.c */