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Commita356d23

Browse files
Fix Y2038 issues with MyStartTime.
Several places treat MyStartTime as a "long", which is only 32 bitswide on some platforms. In reality, MyStartTime is a pg_time_t,i.e., a signed 64-bit integer. This will lead to interesting bugson the aforementioned systems in 2038 when signed 32-bit integersare no longer sufficient to store Unix time (e.g., "pg_ctl start"hanging). To fix, ensure that MyStartTime is handled as a 64-bitvalue everywhere. (Of course, users will need to ensure thattime_t is 64 bits wide on their system, too.)Co-authored-by: Max JohnsonDiscussion:https://postgr.es/m/CO1PR07MB905262E8AC270FAAACED66008D682%40CO1PR07MB9052.namprd07.prod.outlook.comBackpatch-through: 12
1 parent9181077 commita356d23

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6 files changed

+10
-10
lines changed

6 files changed

+10
-10
lines changed

‎contrib/postgres_fdw/option.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -522,7 +522,7 @@ process_pgfdw_appname(const char *appname)
522522
appendStringInfoString(&buf,application_name);
523523
break;
524524
case'c':
525-
appendStringInfo(&buf,"%lx.%x",(long) (MyStartTime),MyProcPid);
525+
appendStringInfo(&buf,"%"INT64_MODIFIER"x.%x",MyStartTime,MyProcPid);
526526
break;
527527
case'C':
528528
appendStringInfoString(&buf,cluster_name);

‎src/backend/utils/error/csvlog.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -120,7 +120,7 @@ write_csvlog(ErrorData *edata)
120120
appendStringInfoChar(&buf,',');
121121

122122
/* session id */
123-
appendStringInfo(&buf,"%lx.%x", (long)MyStartTime,MyProcPid);
123+
appendStringInfo(&buf,"%"INT64_MODIFIER"x.%x",MyStartTime,MyProcPid);
124124
appendStringInfoChar(&buf,',');
125125

126126
/* Line number */

‎src/backend/utils/error/elog.c

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -2944,12 +2944,12 @@ log_status_format(StringInfo buf, const char *format, ErrorData *edata)
29442944
{
29452945
charstrfbuf[128];
29462946

2947-
snprintf(strfbuf,sizeof(strfbuf)-1,"%lx.%x",
2948-
(long) (MyStartTime),MyProcPid);
2947+
snprintf(strfbuf,sizeof(strfbuf)-1,"%"INT64_MODIFIER"x.%x",
2948+
MyStartTime,MyProcPid);
29492949
appendStringInfo(buf,"%*s",padding,strfbuf);
29502950
}
29512951
else
2952-
appendStringInfo(buf,"%lx.%x",(long) (MyStartTime),MyProcPid);
2952+
appendStringInfo(buf,"%"INT64_MODIFIER"x.%x",MyStartTime,MyProcPid);
29532953
break;
29542954
case'p':
29552955
if (padding!=0)

‎src/backend/utils/error/jsonlog.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -168,8 +168,8 @@ write_jsonlog(ErrorData *edata)
168168
}
169169

170170
/* Session id */
171-
appendJSONKeyValueFmt(&buf,"session_id", true,"%lx.%x",
172-
(long)MyStartTime,MyProcPid);
171+
appendJSONKeyValueFmt(&buf,"session_id", true,"%"INT64_MODIFIER"x.%x",
172+
MyStartTime,MyProcPid);
173173

174174
/* Line number */
175175
appendJSONKeyValueFmt(&buf,"line_num", false,"%ld",log_line_number);

‎src/backend/utils/init/miscinit.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -1372,10 +1372,10 @@ CreateLockFile(const char *filename, bool amPostmaster,
13721372
* both datadir and socket lockfiles; although more stuff may get added to
13731373
* the datadir lockfile later.
13741374
*/
1375-
snprintf(buffer,sizeof(buffer),"%d\n%s\n%ld\n%d\n%s\n",
1375+
snprintf(buffer,sizeof(buffer),"%d\n%s\n"INT64_FORMAT"\n%d\n%s\n",
13761376
amPostmaster ? (int)my_pid :-((int)my_pid),
13771377
DataDir,
1378-
(long)MyStartTime,
1378+
MyStartTime,
13791379
PostPortNumber,
13801380
socketDir);
13811381

‎src/bin/pg_ctl/pg_ctl.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -617,7 +617,7 @@ wait_for_postmaster_start(pid_t pm_pid, bool do_checkpoint)
617617
* Allow 2 seconds slop for possible cross-process clock skew.
618618
*/
619619
pmpid=atol(optlines[LOCK_FILE_LINE_PID-1]);
620-
pmstart=atol(optlines[LOCK_FILE_LINE_START_TIME-1]);
620+
pmstart=atoll(optlines[LOCK_FILE_LINE_START_TIME-1]);
621621
if (pmstart >=start_time-2&&
622622
#ifndefWIN32
623623
pmpid==pm_pid

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