-<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.295 2010/07/16 11:20:23 heikki Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.296 2010/07/16 22:25:47 tgl Exp $ -->
<chapter Id="runtime-config">
<title>Server Configuration</title>
</listitem>
</varlistentry>
+ <varlistentry id="guc-log-file-mode" xreflabel="log_file_mode">
+ <term><varname>log_file_mode</varname> (<type>integer</type>)</term>
+ <indexterm>
+ <primary><varname>log_file_mode</> configuration parameter</primary>
+ </indexterm>
+ <listitem>
+ <para>
+ On Unix systems this parameter sets the permissions for log files
+ when <varname>logging_collector</varname> is enabled. (On Microsoft
+ Windows this parameter is ignored.)
+ The parameter value is expected to be a numeric mode
+ specified in the format accepted by the
+ <function>chmod</function> and <function>umask</function>
+ system calls. (To use the customary octal format the number
+ must start with a <literal>0</literal> (zero).)
+ </para>
+ <para>
+ The default permissions are <literal>0600</>, meaning only the
+ server owner can read or write the log files. The other commonly
+ useful setting is <literal>0640</>, allowing members of the owner's
+ group to read the files. Note however that to make use of such a
+ setting, you'll need to alter <xref linkend="guc-log-directory"> to
+ store the files somewhere outside the cluster data directory. In
+ any case, it's unwise to make the log files world-readable, since
+ they might contain sensitive data.
+ </para>
+ <para>
+ This parameter can only be set in the <filename>postgresql.conf</>
+ file or on the server command line.
+ </para>
+ </listitem>
+ </varlistentry>
+
<varlistentry id="guc-log-rotation-age" xreflabel="log_rotation_age">
<term><varname>log_rotation_age</varname> (<type>integer</type>)</term>
<indexterm>
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/postmaster/syslogger.c,v 1.58 2010/07/06 19:18:57 momjian Exp $
+ * $PostgreSQL: pgsql/src/backend/postmaster/syslogger.c,v 1.59 2010/07/16 22:25:50 tgl Exp $
*
*-------------------------------------------------------------------------
*/
char *Log_directory = NULL;
char *Log_filename = NULL;
bool Log_truncate_on_rotation = false;
+int Log_file_mode = 0600;
/*
* Globally visible state (used by elog.c)
static void process_pipe_input(char *logbuffer, int *bytes_in_logbuffer);
static void flush_pipe_input(char *logbuffer, int *bytes_in_logbuffer);
static void open_csvlogfile(void);
+static FILE *logfile_open(const char *filename, const char *mode,
+ bool allow_errors);
#ifdef WIN32
static unsigned int __stdcall pipeThread(void *arg);
*/
filename = logfile_getname(time(NULL), NULL);
- syslogFile = fopen(filename, "a");
-
- if (!syslogFile)
- ereport(FATAL,
- (errcode_for_file_access(),
- (errmsg("could not create log file \"%s\": %m",
- filename))));
-
- setvbuf(syslogFile, NULL, LBF_MODE, 0);
+ syslogFile = logfile_open(filename, "a", false);
pfree(filename);
open_csvlogfile(void)
{
char *filename;
- FILE *fh;
filename = logfile_getname(time(NULL), ".csv");
- fh = fopen(filename, "a");
+ csvlogFile = logfile_open(filename, "a", false);
- if (!fh)
- ereport(FATAL,
- (errcode_for_file_access(),
- (errmsg("could not create log file \"%s\": %m",
- filename))));
+ pfree(filename);
+}
+
+/*
+ * Open a new logfile with proper permissions and buffering options.
+ *
+ * If allow_errors is true, we just log any open failure and return NULL
+ * (with errno still correct for the fopen failure).
+ * Otherwise, errors are treated as fatal.
+ */
+static FILE *
+logfile_open(const char *filename, const char *mode, bool allow_errors)
+{
+ FILE *fh;
+ mode_t oumask;
- setvbuf(fh, NULL, LBF_MODE, 0);
+ /*
+ * Note we do not let Log_file_mode disable IWUSR, since we certainly
+ * want to be able to write the files ourselves.
+ */
+ oumask = umask((mode_t) ((~(Log_file_mode | S_IWUSR)) & 0777));
+ fh = fopen(filename, mode);
+ umask(oumask);
+
+ if (fh)
+ {
+ setvbuf(fh, NULL, LBF_MODE, 0);
#ifdef WIN32
- _setmode(_fileno(fh), _O_TEXT); /* use CRLF line endings on Windows */
+ /* use CRLF line endings on Windows */
+ _setmode(_fileno(fh), _O_TEXT);
#endif
+ }
+ else
+ {
+ int save_errno = errno;
- csvlogFile = fh;
-
- pfree(filename);
+ ereport(allow_errors ? LOG : FATAL,
+ (errcode_for_file_access(),
+ errmsg("could not open log file \"%s\": %m",
+ filename)));
+ errno = save_errno;
+ }
+ return fh;
}
/*
if (Log_truncate_on_rotation && time_based_rotation &&
last_file_name != NULL &&
strcmp(filename, last_file_name) != 0)
- fh = fopen(filename, "w");
+ fh = logfile_open(filename, "w", true);
else
- fh = fopen(filename, "a");
+ fh = logfile_open(filename, "a", true);
if (!fh)
{
- int saveerrno = errno;
-
- ereport(LOG,
- (errcode_for_file_access(),
- errmsg("could not open new log file \"%s\": %m",
- filename)));
-
/*
* ENFILE/EMFILE are not too surprising on a busy system; just
* keep using the old file till we manage to get a new one.
* Otherwise, assume something's wrong with Log_directory and stop
* trying to create files.
*/
- if (saveerrno != ENFILE && saveerrno != EMFILE)
+ if (errno != ENFILE && errno != EMFILE)
{
ereport(LOG,
(errmsg("disabling automatic rotation (use SIGHUP to re-enable)")));
return;
}
- setvbuf(fh, NULL, LBF_MODE, 0);
-
-#ifdef WIN32
- _setmode(_fileno(fh), _O_TEXT); /* use CRLF line endings on Windows */
-#endif
-
fclose(syslogFile);
syslogFile = fh;
if (Log_truncate_on_rotation && time_based_rotation &&
last_csv_file_name != NULL &&
strcmp(csvfilename, last_csv_file_name) != 0)
- fh = fopen(csvfilename, "w");
+ fh = logfile_open(csvfilename, "w", true);
else
- fh = fopen(csvfilename, "a");
+ fh = logfile_open(csvfilename, "a", true);
if (!fh)
{
- int saveerrno = errno;
-
- ereport(LOG,
- (errcode_for_file_access(),
- errmsg("could not open new log file \"%s\": %m",
- csvfilename)));
-
/*
* ENFILE/EMFILE are not too surprising on a busy system; just
* keep using the old file till we manage to get a new one.
* Otherwise, assume something's wrong with Log_directory and stop
* trying to create files.
*/
- if (saveerrno != ENFILE && saveerrno != EMFILE)
+ if (errno != ENFILE && errno != EMFILE)
{
ereport(LOG,
(errmsg("disabling automatic rotation (use SIGHUP to re-enable)")));
return;
}
- setvbuf(fh, NULL, LBF_MODE, 0);
-
-#ifdef WIN32
- _setmode(_fileno(fh), _O_TEXT); /* use CRLF line endings on Windows */
-#endif
-
fclose(csvlogFile);
csvlogFile = fh;
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.561 2010/07/06 22:55:26 rhaas Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.562 2010/07/16 22:25:50 tgl Exp $
*
*--------------------------------------------------------------------
*/
static bool assign_effective_io_concurrency(int newval, bool doit, GucSource source);
static const char *assign_pgstat_temp_directory(const char *newval, bool doit, GucSource source);
static const char *assign_application_name(const char *newval, bool doit, GucSource source);
+static const char *show_unix_socket_permissions(void);
+static const char *show_log_file_mode(void);
static char *config_enum_get_options(struct config_enum * record,
const char *prefix, const char *suffix,
{"unix_socket_permissions", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
gettext_noop("Sets the access permissions of the Unix-domain socket."),
gettext_noop("Unix-domain sockets use the usual Unix file system "
- "permission set. The parameter value is expected to be a numeric mode "
- "specification in the form accepted by the chmod and umask system "
- "calls. (To use the customary octal format the number must start with "
- "a 0 (zero).)")
+ "permission set. The parameter value is expected "
+ "to be a numeric mode specification in the form "
+ "accepted by the chmod and umask system calls. "
+ "(To use the customary octal format the number must "
+ "start with a 0 (zero).)")
},
&Unix_socket_permissions,
- 0777, 0000, 0777, NULL, NULL
+ 0777, 0000, 0777, NULL, show_unix_socket_permissions
+ },
+
+ {
+ {"log_file_mode", PGC_SIGHUP, LOGGING_WHERE,
+ gettext_noop("Sets the file permissions for log files."),
+ gettext_noop("The parameter value is expected "
+ "to be a numeric mode specification in the form "
+ "accepted by the chmod and umask system calls. "
+ "(To use the customary octal format the number must "
+ "start with a 0 (zero).)")
+ },
+ &Log_file_mode,
+ 0600, 0000, 0777, NULL, show_log_file_mode
},
{
return newval;
}
+static const char *
+show_unix_socket_permissions(void)
+{
+ static char buf[8];
+
+ snprintf(buf, sizeof(buf), "%04o", Unix_socket_permissions);
+ return buf;
+}
+
+static const char *
+show_log_file_mode(void)
+{
+ static char buf[8];
+
+ snprintf(buf, sizeof(buf), "%04o", Log_file_mode);
+ return buf;
+}
+
#include "guc-file.c"
OSDN Git Service
