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Code review for log_line_prefix patch. Cooperate with StringInfo instead
of fighting it, avoid hard-wired (and wrong) assumption about max length of prefix, cause %l to actually work as documented, don't compute data we may not need.
This commit is contained in:
Tom Lane
parent
8726591720
commit
74ffc77279
@ -37,7 +37,7 @@
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/error/elog.c,v 1.128 2004/03/15 15:56:23 momjian Exp $
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* $PostgreSQL: pgsql/src/backend/utils/error/elog.c,v 1.129 2004/03/19 02:23:59 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -69,7 +69,7 @@ ErrorContextCallback *error_context_stack = NULL;
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/* GUC parameters */
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PGErrorVerbosity Log_error_verbosity = PGERROR_VERBOSE;
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char *Log_line_prefix = ""; /* format for extra log line info */
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char *Log_line_prefix = NULL; /* format for extra log line info */
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#ifdef HAVE_SYSLOG
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/*
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@ -136,13 +136,14 @@ static int recursion_depth = 0; /* to detect actual recursion */
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} while (0)
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static void log_line_prefix(StringInfo buf);
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static void send_message_to_server_log(ErrorData *edata);
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static void send_message_to_frontend(ErrorData *edata);
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static char *expand_fmt_string(const char *fmt, ErrorData *edata);
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static const char *useful_strerror(int errnum);
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static const char *error_severity(int elevel);
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static void append_with_tabs(StringInfo buf, const char *str);
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static const char *log_line_prefix(void);
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/*
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* errstart --- begin an error-reporting cycle
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@ -1019,135 +1020,139 @@ write_syslog(int level, const char *line)
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#endif /* HAVE_SYSLOG */
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/*
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* Format tag info for log lines
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* Format tag info for log lines; append to the provided buffer.
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*/
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static const char *
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log_line_prefix(void)
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static void
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log_line_prefix(StringInfo buf)
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{
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/* static counter for line numbers */
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static long log_line_number = 0;
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/* has counter been reset in current process? */
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static int log_my_pid = 0;
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/* static accumulator for line numbers */
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static int log_line_number = 0;
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/* space for option string + one of each option, plus some room to spare */
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/* Note: if more identifiers are built in this will have to increase */
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static char *result = NULL;
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int format_len = strlen(Log_line_prefix);
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int result_len = 2*NAMEDATALEN + format_len +120 ;
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int format_len;
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int i;
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if (result == NULL)
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result = malloc(result_len);
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result[0] = '\0';
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if (format_len > 0)
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/*
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* This is one of the few places where we'd rather not inherit a
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* static variable's value from the postmaster. But since we will,
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* reset it when MyProcPid changes.
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*/
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if (log_my_pid != MyProcPid)
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{
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int i,j;
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char * dbname = NULL;
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char * username = NULL;
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time_t stamp_time;
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log_line_number++;
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if (MyProcPort != NULL)
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log_line_number = 0;
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log_my_pid = MyProcPid;
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}
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log_line_number++;
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if (Log_line_prefix == NULL)
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return; /* in case guc hasn't run yet */
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format_len = strlen(Log_line_prefix);
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for (i = 0; i < format_len; i++)
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{
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if (Log_line_prefix[i] != '%')
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{
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dbname = MyProcPort->database_name;
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username = MyProcPort->user_name;
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if (dbname == NULL || *dbname == '\0')
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dbname = gettext("[unknown]");
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if (username == NULL || *username == '\0')
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username = gettext("[unknown]");
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/* literal char, just copy */
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appendStringInfoChar(buf, Log_line_prefix[i]);
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continue;
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}
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/* go to char after '%' */
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i++;
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if (i >= format_len)
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{
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/* format error - ignore it */
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break;
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}
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/*
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* invariant through each iteration of this loop:
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* . j is the index of the trailing null on result
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* . result_len - j is the number of chars we have room for
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* including the trailing null
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* . there is room to write at least one more non-null char plus the
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* trailing null
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*/
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for (i = 0, j=0; i < format_len && j < result_len-1; i++)
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/* process the option */
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switch (Log_line_prefix[i])
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{
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if(Log_line_prefix[i] != '%')
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{
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/* literal char, just copy */
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result[j]=Log_line_prefix[i];
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j++;
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result[j] = '\0';
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continue;
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}
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else if (i == format_len - 1)
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{
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/* format error - skip it */
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continue;
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}
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case 'u':
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if (MyProcPort)
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{
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const char *username = MyProcPort->user_name;
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/* go to char after '%' */
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i++;
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if (username == NULL || *username == '\0')
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username = gettext("[unknown]");
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appendStringInfo(buf, "%s", username);
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}
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break;
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case 'd':
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if (MyProcPort)
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{
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const char *dbname = MyProcPort->database_name;
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/* in postmaster and friends, skip non-applicable options,
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* stop if %x is seen
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*/
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if (MyProcPort == NULL)
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{
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if (Log_line_prefix[i] == 'x')
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break;
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if (strchr("udcsir",Log_line_prefix[i]) != NULL)
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continue;
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}
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if (dbname == NULL || *dbname == '\0')
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dbname = gettext("[unknown]");
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appendStringInfo(buf, "%s", dbname);
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}
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break;
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case 'c':
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if (MyProcPort)
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{
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appendStringInfo(buf, "%lx.%lx",
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(long)(MyProcPort->session_start.tv_sec),
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(long)MyProcPid);
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}
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break;
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case 'p':
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appendStringInfo(buf, "%ld", (long)MyProcPid);
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break;
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case 'l':
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appendStringInfo(buf, "%ld", log_line_number);
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break;
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case 't':
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{
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time_t stamp_time = time(NULL);
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char strfbuf[32];
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/* process the option */
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switch (Log_line_prefix[i])
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{
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case 'u':
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j += snprintf(result+j,result_len-j,"%s",username);
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break;
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case 'd':
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j += snprintf(result+j,result_len-j,"%s",dbname);
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break;
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case 'c':
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j += snprintf(result+j,result_len-j,"%lx.%lx",
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(long)(MyProcPort->session_start.tv_sec),
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(long)MyProcPid);
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break;
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case 'p':
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j += snprintf(result+j,result_len-j,"%ld",(long)MyProcPid);
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break;
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case 'l':
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j += snprintf(result+j,result_len-j,"%d",log_line_number);
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break;
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case 't':
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stamp_time = time(NULL);
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j += strftime(result+j, result_len-j, "%Y-%m-%d %H:%M:%S",
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strftime(strfbuf, sizeof(strfbuf), "%Y-%m-%d %H:%M:%S",
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localtime(&stamp_time));
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break;
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case 's':
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j += strftime(result+j, result_len-j, "%Y-%m-%d %H:%M:%S",
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localtime(&(MyProcPort->session_start.tv_sec)));
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break;
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case 'i':
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j += snprintf(result+j,result_len-j,"%s",
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MyProcPort->commandTag);
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break;
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case 'r':
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j += snprintf(result+j,result_len-j,"%s",
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MyProcPort->remote_host);
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appendStringInfoString(buf, strfbuf);
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}
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break;
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case 's':
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if (MyProcPort)
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{
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time_t stamp_time = MyProcPort->session_start.tv_sec;
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char strfbuf[32];
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strftime(strfbuf, sizeof(strfbuf), "%Y-%m-%d %H:%M:%S",
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localtime(&stamp_time));
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appendStringInfoString(buf, strfbuf);
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}
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break;
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case 'i':
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if (MyProcPort)
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{
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appendStringInfo(buf, "%s", MyProcPort->commandTag);
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}
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break;
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case 'r':
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if (MyProcPort)
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{
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appendStringInfo(buf, "%s", MyProcPort->remote_host);
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if (strlen(MyProcPort->remote_port) > 0)
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j += snprintf(result+j,result_len-j,"(%s)",
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MyProcPort->remote_port);
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break;
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case 'x':
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/* non-postmaster case - just ignore */
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break;
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case '%':
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result[j] = '%';
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j++;
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result[j] = '\0';
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break;
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default:
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/* format error - skip it */
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break;
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}
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appendStringInfo(buf, "(%s)",
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MyProcPort->remote_port);
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}
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break;
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case 'x':
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/* in postmaster and friends, stop if %x is seen */
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/* in a backend, just ignore */
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if (MyProcPort == NULL)
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i = format_len;
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break;
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case '%':
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appendStringInfoChar(buf, '%');
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break;
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default:
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/* format error - ignore it */
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break;
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}
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}
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return result;
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}
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@ -1161,8 +1166,8 @@ send_message_to_server_log(ErrorData *edata)
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initStringInfo(&buf);
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appendStringInfo(&buf, "%s%s: ",
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log_line_prefix(), error_severity(edata->elevel));
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log_line_prefix(&buf);
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appendStringInfo(&buf, "%s: ", error_severity(edata->elevel));
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if (Log_error_verbosity >= PGERROR_VERBOSE)
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{
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@ -1195,21 +1200,21 @@ send_message_to_server_log(ErrorData *edata)
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{
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if (edata->detail)
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{
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appendStringInfoString(&buf, log_line_prefix() );
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log_line_prefix(&buf);
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appendStringInfoString(&buf, gettext("DETAIL: "));
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append_with_tabs(&buf, edata->detail);
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appendStringInfoChar(&buf, '\n');
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}
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if (edata->hint)
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{
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appendStringInfoString(&buf, log_line_prefix() );
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log_line_prefix(&buf);
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appendStringInfoString(&buf, gettext("HINT: "));
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append_with_tabs(&buf, edata->hint);
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appendStringInfoChar(&buf, '\n');
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}
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if (edata->context)
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{
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appendStringInfoString(&buf, log_line_prefix() );
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log_line_prefix(&buf);
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appendStringInfoString(&buf, gettext("CONTEXT: "));
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append_with_tabs(&buf, edata->context);
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appendStringInfoChar(&buf, '\n');
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@ -1218,14 +1223,18 @@ send_message_to_server_log(ErrorData *edata)
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{
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/* assume no newlines in funcname or filename... */
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if (edata->funcname && edata->filename)
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appendStringInfo(&buf, gettext("%sLOCATION: %s, %s:%d\n"),
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log_line_prefix(),
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{
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log_line_prefix(&buf);
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appendStringInfo(&buf, gettext("LOCATION: %s, %s:%d\n"),
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edata->funcname, edata->filename,
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edata->lineno);
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}
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else if (edata->filename)
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appendStringInfo(&buf, gettext("%sLOCATION: %s:%d\n"),
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log_line_prefix(),
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{
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log_line_prefix(&buf);
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appendStringInfo(&buf, gettext("LOCATION: %s:%d\n"),
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edata->filename, edata->lineno);
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}
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}
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}
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@ -1234,7 +1243,7 @@ send_message_to_server_log(ErrorData *edata)
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*/
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if (edata->elevel >= log_min_error_statement && debug_query_string != NULL)
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{
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appendStringInfoString(&buf, log_line_prefix() );
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log_line_prefix(&buf);
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appendStringInfoString(&buf, gettext("STATEMENT: "));
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append_with_tabs(&buf, debug_query_string);
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appendStringInfoChar(&buf, '\n');
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@ -1284,11 +1293,7 @@ send_message_to_server_log(ErrorData *edata)
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/* Write to stderr, if enabled */
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if (Use_syslog <= 1 || whereToSendOutput == Debug)
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{
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/*
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* Timestamp and PID are only used for stderr output --- we assume
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* the syslog daemon will supply them for us in the other case.
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*/
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fprintf(stderr, "%s",buf.data);
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fprintf(stderr, "%s", buf.data);
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}
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pfree(buf.data);
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@ -5,7 +5,7 @@
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* to contain some useful information. Mechanism differs wildly across
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* platforms.
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*
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* $PostgreSQL: pgsql/src/backend/utils/misc/ps_status.c,v 1.18 2004/03/09 04:43:07 momjian Exp $
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* $PostgreSQL: pgsql/src/backend/utils/misc/ps_status.c,v 1.19 2004/03/19 02:23:59 tgl Exp $
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*
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* Copyright (c) 2000-2003, PostgreSQL Global Development Group
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* various details abducted from various places
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@ -277,16 +277,15 @@ init_ps_display(const char *username, const char *dbname,
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void
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set_ps_display(const char *activity)
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{
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/* save tag for possible use by elog.c */
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if (MyProcPort)
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MyProcPort->commandTag = activity;
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#ifndef PS_USE_NONE
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/* no ps display for stand-alone backend */
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if (!IsUnderPostmaster)
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return;
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/* save it for logging context */
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if (MyProcPort)
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MyProcPort->commandTag = (char *) activity;
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#ifndef PS_USE_NONE
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#ifdef PS_USE_CLOBBER_ARGV
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/* If ps_buffer is a pointer, it might still be null */
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if (!ps_buffer)
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@ -11,7 +11,7 @@
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* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/libpq/libpq-be.h,v 1.42 2004/03/09 04:43:07 momjian Exp $
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* $PostgreSQL: pgsql/src/include/libpq/libpq-be.h,v 1.43 2004/03/19 02:23:59 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -50,8 +50,6 @@ typedef struct Port
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SockAddr raddr; /* remote addr (client) */
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char *remote_host; /* name (or ip addr) of remote host */
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char *remote_port; /* text rep of remote port */
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char *commandTag; /* command tag for display in log lines */
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struct timeval session_start; /* for session duration logging */
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CAC_state canAcceptConnections; /* postmaster connection status */
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/*
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@ -73,6 +71,14 @@ typedef struct Port
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char md5Salt[4]; /* Password salt */
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char cryptSalt[2]; /* Password salt */
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/*
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* Information that really has no business at all being in struct Port,
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* but since it gets used by elog.c in the same way as database_name
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* and other members of this struct, we may as well keep it here.
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*/
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const char *commandTag; /* current command tag */
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struct timeval session_start; /* for session duration logging */
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/*
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* SSL structures
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*/
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