Itagaki Takahiro wrote:
> I checked "log_file_mode GUC" patch, and found a couple of Windows-specific
> and translation issues.
Thank you for the review. Attached patch attempts to fix these issues.
> * fchmod() is not available on some platforms, including Windows.
> fh = fopen(filename, mode);
> setvbuf(fh, NULL, LBF_MODE, 0);
> fchmod(fileno(fh), Log_file_mode);
>
I've changed that to using chmod(), that should be available everywhere and
is already used in several places in Postgres code.
> * How does the file mode work on Windows?
> If it doesn't work, we should explain it in docs.
Indeed it seems that chmod() doesn't actually do anything useful on Windows.
So I've added a documentation note about it and put an #ifndef WIN32 around
the chmod() call.
> It might look a duplication of codes, but I think this form is better
> because we can reuse the existing translation catalogs.
> if (am_rotating)
> ereport(FATAL, ... "could not create log file ...);
> else
> ereport(LOG, ... "could not open new log file ...);
>
Fixed.
regards,
Martin
*** a/doc/src/sgml/config.sgml
--- b/doc/src/sgml/config.sgml
***************
*** 2789,2794 **** local0.* /var/log/postgresql
--- 2789,2814 ----
</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 the file mode will be ignored. The value is an octal number
+ consisting of 3 digits signifying the permissions for the user, group
+ and others.
+ </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>
*** a/src/backend/commands/variable.c
--- b/src/backend/commands/variable.c
***************
*** 914,916 **** show_role(void)
--- 914,946 ----
return endptr + 1;
}
+
+
+ /*
+ * LOG_FILE_MODE
+ */
+
+ extern int Log_file_mode; /* in guc.c */
+
+ /*
+ * assign_log_file_mode: GUC assign_hook for log_file_mode
+ */
+ const char *
+ assign_log_file_mode(const char *value, bool doit, GucSource source)
+ {
+ char *endptr;
+ long file_mode = strtol(value, &endptr, 8);
+
+ if (!*value || *endptr || file_mode < 0 || file_mode > 0777)
+ {
+ ereport(GUC_complaint_elevel(source),
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("invalid value for parameter \"log_file_mode\"")));
+ return NULL;
+ }
+
+ if (doit)
+ Log_file_mode = (int) file_mode;
+
+ return value;
+ }
*** a/src/backend/postmaster/syslogger.c
--- b/src/backend/postmaster/syslogger.c
***************
*** 73,78 **** int Log_RotationSize = 10 * 1024;
--- 73,79 ----
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)
***************
*** 135,140 **** static void syslogger_parseArgs(int argc, char *argv[]);
--- 136,142 ----
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 am_rotating);
#ifdef WIN32
static unsigned int __stdcall pipeThread(void *arg);
***************
*** 516,530 **** SysLogger_Start(void)
*/
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);
pfree(filename);
--- 518,524 ----
*/
filename = logfile_getname(time(NULL), NULL);
! syslogFile = logfile_open(filename, "a", false);
pfree(filename);
***************
*** 1004,1018 **** open_csvlogfile(void)
filename = logfile_getname(time(NULL), ".csv");
! fh = fopen(filename, "a");
!
! if (!fh)
! ereport(FATAL,
! (errcode_for_file_access(),
! (errmsg("could not create log file \"%s\": %m",
! filename))));
!
! setvbuf(fh, NULL, LBF_MODE, 0);
#ifdef WIN32
_setmode(_fileno(fh), _O_TEXT); /* use CRLF line endings on Windows */
--- 998,1004 ----
filename = logfile_getname(time(NULL), ".csv");
! fh = logfile_open(filename, "a", false);
#ifdef WIN32
_setmode(_fileno(fh), _O_TEXT); /* use CRLF line endings on Windows */
***************
*** 1025,1030 **** open_csvlogfile(void)
--- 1011,1050 ----
}
/*
+ * Open the logfile, set permissions and buffering options.
+ */
+ static FILE *
+ logfile_open(const char *filename, const char *mode, bool am_rotating)
+ {
+ FILE *fh;
+
+ fh = fopen(filename, mode);
+
+ if (fh)
+ {
+ setvbuf(fh, NULL, LBF_MODE, 0);
+ #ifndef WIN32
+ chmod(filename, Log_file_mode);
+ #endif
+ }
+ else
+ {
+ if (am_rotating)
+ ereport(LOG,
+ (errcode_for_file_access(),
+ errmsg("could not create new log file \"%s\": %m",
+ filename)));
+ else
+ ereport(FATAL,
+ (errcode_for_file_access(),
+ errmsg("could not create log file \"%s\": %m",
+ filename)));
+ }
+
+ return fh;
+ }
+
+ /*
* perform logfile rotation
*/
static void
***************
*** 1070,1088 **** logfile_rotate(bool time_based_rotation, int size_rotation_for)
if (Log_truncate_on_rotation && time_based_rotation &&
last_file_name != NULL &&
strcmp(filename, last_file_name) != 0)
! fh = fopen(filename, "w");
else
! fh = fopen(filename, "a");
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.
--- 1090,1103 ----
if (Log_truncate_on_rotation && time_based_rotation &&
last_file_name != NULL &&
strcmp(filename, last_file_name) != 0)
! fh = logfile_open(filename, "w", true);
else
! fh = logfile_open(filename, "a", true);
if (!fh)
{
int saveerrno = errno;
/*
* ENFILE/EMFILE are not too surprising on a busy system; just
* keep using the old file till we manage to get a new one.
***************
*** 1128,1146 **** logfile_rotate(bool time_based_rotation, int size_rotation_for)
if (Log_truncate_on_rotation && time_based_rotation &&
last_csv_file_name != NULL &&
strcmp(csvfilename, last_csv_file_name) != 0)
! fh = fopen(csvfilename, "w");
else
! fh = fopen(csvfilename, "a");
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.
--- 1143,1156 ----
if (Log_truncate_on_rotation && time_based_rotation &&
last_csv_file_name != NULL &&
strcmp(csvfilename, last_csv_file_name) != 0)
! fh = logfile_open(csvfilename, "w", true);
else
! fh = logfile_open(csvfilename, "a", true);
if (!fh)
{
int saveerrno = errno;
/*
* ENFILE/EMFILE are not too surprising on a busy system; just
* keep using the old file till we manage to get a new one.
***************
*** 1162,1169 **** logfile_rotate(bool time_based_rotation, int size_rotation_for)
return;
}
- setvbuf(fh, NULL, LBF_MODE, 0);
-
#ifdef WIN32
_setmode(_fileno(fh), _O_TEXT); /* use CRLF line endings on Windows */
#endif
--- 1172,1177 ----
*** a/src/backend/utils/misc/guc.c
--- b/src/backend/utils/misc/guc.c
***************
*** 412,417 **** static char *server_version_string;
--- 412,418 ----
static int server_version_num;
static char *timezone_string;
static char *log_timezone_string;
+ static char *log_file_mode_string;
static char *timezone_abbreviations_string;
static char *XactIsoLevel_string;
static char *data_directory;
***************
*** 2243,2248 **** static struct config_string ConfigureNamesString[] =
--- 2244,2258 ----
},
{
+ {"log_file_mode", PGC_SIGHUP, LOGGING_WHERE,
+ gettext_noop("Sets the file permissions for log files."),
+ NULL
+ },
+ &log_file_mode_string,
+ "0600", assign_log_file_mode
+ },
+
+ {
{"DateStyle", PGC_USERSET, CLIENT_CONN_LOCALE,
gettext_noop("Sets the display format for date and time values."),
gettext_noop("Also controls interpretation of ambiguous "
*** a/src/backend/utils/misc/postgresql.conf.sample
--- b/src/backend/utils/misc/postgresql.conf.sample
***************
*** 265,270 ****
--- 265,271 ----
# can be absolute or relative to PGDATA
#log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log' # log file name pattern,
# can include strftime() escapes
+ #log_file_mode = 0600 # creation mode for log files, octal
#log_truncate_on_rotation = off # If on, an existing log file of the
# same name as the new log file will be
# truncated rather than appended to.
*** a/src/include/commands/variable.h
--- b/src/include/commands/variable.h
***************
*** 35,39 **** extern const char *show_role(void);
--- 35,42 ----
extern const char *assign_session_authorization(const char *value,
bool doit, GucSource source);
extern const char *show_session_authorization(void);
+ const char *assign_log_file_mode(const char *value,
+ bool doit, GucSource source);
+ const char *show_log_file_mode(void);
#endif /* VARIABLE_H */
*** a/src/include/postmaster/syslogger.h
--- b/src/include/postmaster/syslogger.h
***************
*** 68,73 **** extern int Log_RotationSize;
--- 68,74 ----
extern PGDLLIMPORT char *Log_directory;
extern PGDLLIMPORT char *Log_filename;
extern bool Log_truncate_on_rotation;
+ extern int Log_file_mode;
extern bool am_syslogger;
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