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Commit3a4b891

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Fix more format truncation issues
Fix the warnings created by the compiler warning options-Wformat-overflow=2 -Wformat-truncation=2, supported since GCC 7. Thisis a more aggressive variant of the fixes in6275f5d, which GCC 7 warned about bydefault.The issues are all harmless, but some dubious coding patterns arecleaned up.One issue that is of external interest is that BGW_MAXLEN is increasedfrom 64 to 96. Apparently, the old value would cause the bgw_name oflogical replication workers to be truncated in some circumstances.But this doesn't actually add those warning options. It appears thatthe warnings depend a bit on compilation and optimization options, so itwould be annoying to have to keep up with that. This is more of aonce-in-a-while cleanup.Reviewed-by: Michael Paquier <michael@paquier.xyz>
1 parent648a6c7 commit3a4b891

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14 files changed

+38
-54
lines changed

14 files changed

+38
-54
lines changed

‎contrib/pgstattuple/pgstattuple.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -89,7 +89,7 @@ static Datum
8989
build_pgstattuple_type(pgstattuple_type*stat,FunctionCallInfofcinfo)
9090
{
9191
#defineNCOLUMNS9
92-
#defineNCHARS32
92+
#defineNCHARS314
9393

9494
HeapTupletuple;
9595
char*values[NCOLUMNS];

‎src/backend/commands/explain.c

Lines changed: 3 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -3337,10 +3337,11 @@ void
33373337
ExplainPropertyFloat(constchar*qlabel,doublevalue,intndigits,
33383338
ExplainState*es)
33393339
{
3340-
charbuf[256];
3340+
char*buf;
33413341

3342-
snprintf(buf,sizeof(buf),"%.*f",ndigits,value);
3342+
buf=psprintf("%.*f",ndigits,value);
33433343
ExplainProperty(qlabel,buf, true,es);
3344+
pfree(buf);
33443345
}
33453346

33463347
/*

‎src/backend/libpq/be-secure-openssl.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1013,7 +1013,7 @@ static const char *
10131013
SSLerrmessage(unsigned longecode)
10141014
{
10151015
constchar*errreason;
1016-
staticcharerrbuf[32];
1016+
staticcharerrbuf[36];
10171017

10181018
if (ecode==0)
10191019
return_("no SSL error reported");

‎src/backend/utils/adt/dbsize.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -86,7 +86,7 @@ calculate_database_size(Oid dbOid)
8686
DIR*dirdesc;
8787
structdirent*direntry;
8888
chardirpath[MAXPGPATH];
89-
charpathname[MAXPGPATH+12+sizeof(TABLESPACE_VERSION_DIRECTORY)];
89+
charpathname[MAXPGPATH+21+sizeof(TABLESPACE_VERSION_DIRECTORY)];
9090
AclResultaclresult;
9191

9292
/*

‎src/backend/utils/adt/float.c

Lines changed: 10 additions & 14 deletions
Original file line numberDiff line numberDiff line change
@@ -44,10 +44,6 @@ static const uint32 nan[2] = {0xffffffff, 0x7fffffff};
4444
#defineNAN (*(const double *) nan)
4545
#endif
4646

47-
/* not sure what the following should be, but better to make it over-sufficient */
48-
#defineMAXFLOATWIDTH64
49-
#defineMAXDOUBLEWIDTH128
50-
5147
/*
5248
* check to see if a float4/8 val has underflowed or overflowed
5349
*/
@@ -360,18 +356,18 @@ Datum
360356
float4out(PG_FUNCTION_ARGS)
361357
{
362358
float4num=PG_GETARG_FLOAT4(0);
363-
char*ascii= (char*)palloc(MAXFLOATWIDTH+1);
359+
char*ascii;
364360

365361
if (isnan(num))
366-
PG_RETURN_CSTRING(strcpy(ascii,"NaN"));
362+
PG_RETURN_CSTRING(pstrdup("NaN"));
367363

368364
switch (is_infinite(num))
369365
{
370366
case1:
371-
strcpy(ascii,"Infinity");
367+
ascii=pstrdup("Infinity");
372368
break;
373369
case-1:
374-
strcpy(ascii,"-Infinity");
370+
ascii=pstrdup("-Infinity");
375371
break;
376372
default:
377373
{
@@ -380,7 +376,7 @@ float4out(PG_FUNCTION_ARGS)
380376
if (ndig<1)
381377
ndig=1;
382378

383-
snprintf(ascii,MAXFLOATWIDTH+1,"%.*g",ndig,num);
379+
ascii=psprintf("%.*g",ndig,num);
384380
}
385381
}
386382

@@ -596,18 +592,18 @@ float8out(PG_FUNCTION_ARGS)
596592
char*
597593
float8out_internal(doublenum)
598594
{
599-
char*ascii= (char*)palloc(MAXDOUBLEWIDTH+1);
595+
char*ascii;
600596

601597
if (isnan(num))
602-
returnstrcpy(ascii,"NaN");
598+
returnpstrdup("NaN");
603599

604600
switch (is_infinite(num))
605601
{
606602
case1:
607-
strcpy(ascii,"Infinity");
603+
ascii=pstrdup("Infinity");
608604
break;
609605
case-1:
610-
strcpy(ascii,"-Infinity");
606+
ascii=pstrdup("-Infinity");
611607
break;
612608
default:
613609
{
@@ -616,7 +612,7 @@ float8out_internal(double num)
616612
if (ndig<1)
617613
ndig=1;
618614

619-
snprintf(ascii,MAXDOUBLEWIDTH+1,"%.*g",ndig,num);
615+
ascii=psprintf("%.*g",ndig,num);
620616
}
621617
}
622618

‎src/backend/utils/adt/formatting.c

Lines changed: 10 additions & 23 deletions
Original file line numberDiff line numberDiff line change
@@ -117,13 +117,6 @@
117117
#defineDCH_MAX_ITEM_SIZ 12/* max localized day name*/
118118
#defineNUM_MAX_ITEM_SIZ8/* roman number (RN has 15 chars)*/
119119

120-
/* ----------
121-
* More is in float.c
122-
* ----------
123-
*/
124-
#defineMAXFLOATWIDTH60
125-
#defineMAXDOUBLEWIDTH500
126-
127120

128121
/* ----------
129122
* Format parser structs
@@ -3911,9 +3904,7 @@ do_to_timestamp(text *date_txt, text *fmt,
39113904
tmfc.tzm<0||tmfc.tzm >=MINS_PER_HOUR)
39123905
DateTimeParseError(DTERR_TZDISP_OVERFLOW,date_str,"timestamp");
39133906

3914-
tz=palloc(7);
3915-
3916-
snprintf(tz,7,"%c%02d:%02d",
3907+
tz=psprintf("%c%02d:%02d",
39173908
tmfc.tzsign>0 ?'+' :'-',tmfc.tzh,tmfc.tzm);
39183909

39193910
tm->tm_zone=tz;
@@ -4135,7 +4126,7 @@ int_to_roman(int number)
41354126
num=0;
41364127
char*p=NULL,
41374128
*result,
4138-
numstr[5];
4129+
numstr[12];
41394130

41404131
result= (char*)palloc(16);
41414132
*result='\0';
@@ -5441,8 +5432,7 @@ int4_to_char(PG_FUNCTION_ARGS)
54415432
/* we can do it easily because float8 won't lose any precision */
54425433
float8val= (float8)value;
54435434

5444-
orgnum= (char*)palloc(MAXDOUBLEWIDTH+1);
5445-
snprintf(orgnum,MAXDOUBLEWIDTH+1,"%+.*e",Num.post,val);
5435+
orgnum= (char*)psprintf("%+.*e",Num.post,val);
54465436

54475437
/*
54485438
* Swap a leading positive sign for a space.
@@ -5641,7 +5631,6 @@ float4_to_char(PG_FUNCTION_ARGS)
56415631
numstr=orgnum=int_to_roman((int)rint(value));
56425632
elseif (IS_EEEE(&Num))
56435633
{
5644-
numstr=orgnum= (char*)palloc(MAXDOUBLEWIDTH+1);
56455634
if (isnan(value)||is_infinite(value))
56465635
{
56475636
/*
@@ -5655,7 +5644,7 @@ float4_to_char(PG_FUNCTION_ARGS)
56555644
}
56565645
else
56575646
{
5658-
snprintf(orgnum,MAXDOUBLEWIDTH+1,"%+.*e",Num.post,value);
5647+
numstr=orgnum=psprintf("%+.*e",Num.post,value);
56595648

56605649
/*
56615650
* Swap a leading positive sign for a space.
@@ -5679,16 +5668,15 @@ float4_to_char(PG_FUNCTION_ARGS)
56795668
Num.pre+=Num.multi;
56805669
}
56815670

5682-
orgnum= (char*)palloc(MAXFLOATWIDTH+1);
5683-
snprintf(orgnum,MAXFLOATWIDTH+1,"%.0f",fabs(val));
5671+
orgnum= (char*)psprintf("%.0f",fabs(val));
56845672
numstr_pre_len=strlen(orgnum);
56855673

56865674
/* adjust post digits to fit max float digits */
56875675
if (numstr_pre_len >=FLT_DIG)
56885676
Num.post=0;
56895677
elseif (numstr_pre_len+Num.post>FLT_DIG)
56905678
Num.post=FLT_DIG-numstr_pre_len;
5691-
snprintf(orgnum,MAXFLOATWIDTH+1,"%.*f",Num.post,val);
5679+
orgnum=psprintf("%.*f",Num.post,val);
56925680

56935681
if (*orgnum=='-')
56945682
{/* < 0 */
@@ -5747,7 +5735,6 @@ float8_to_char(PG_FUNCTION_ARGS)
57475735
numstr=orgnum=int_to_roman((int)rint(value));
57485736
elseif (IS_EEEE(&Num))
57495737
{
5750-
numstr=orgnum= (char*)palloc(MAXDOUBLEWIDTH+1);
57515738
if (isnan(value)||is_infinite(value))
57525739
{
57535740
/*
@@ -5761,7 +5748,7 @@ float8_to_char(PG_FUNCTION_ARGS)
57615748
}
57625749
else
57635750
{
5764-
snprintf(orgnum,MAXDOUBLEWIDTH+1,"%+.*e",Num.post,value);
5751+
numstr=orgnum= (char*)psprintf("%+.*e",Num.post,value);
57655752

57665753
/*
57675754
* Swap a leading positive sign for a space.
@@ -5784,15 +5771,15 @@ float8_to_char(PG_FUNCTION_ARGS)
57845771
val=value*multi;
57855772
Num.pre+=Num.multi;
57865773
}
5787-
orgnum=(char*)palloc(MAXDOUBLEWIDTH+1);
5788-
numstr_pre_len=snprintf(orgnum,MAXDOUBLEWIDTH+1,"%.0f",fabs(val));
5774+
orgnum=psprintf("%.0f",fabs(val));
5775+
numstr_pre_len=strlen(orgnum);
57895776

57905777
/* adjust post digits to fit max double digits */
57915778
if (numstr_pre_len >=DBL_DIG)
57925779
Num.post=0;
57935780
elseif (numstr_pre_len+Num.post>DBL_DIG)
57945781
Num.post=DBL_DIG-numstr_pre_len;
5795-
snprintf(orgnum,MAXDOUBLEWIDTH+1,"%.*f",Num.post,val);
5782+
orgnum=psprintf("%.*f",Num.post,val);
57965783

57975784
if (*orgnum=='-')
57985785
{/* < 0 */

‎src/backend/utils/misc/guc.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -10528,7 +10528,7 @@ check_cluster_name(char **newval, void **extra, GucSource source)
1052810528
staticconstchar*
1052910529
show_unix_socket_permissions(void)
1053010530
{
10531-
staticcharbuf[8];
10531+
staticcharbuf[12];
1053210532

1053310533
snprintf(buf,sizeof(buf),"%04o",Unix_socket_permissions);
1053410534
returnbuf;
@@ -10537,7 +10537,7 @@ show_unix_socket_permissions(void)
1053710537
staticconstchar*
1053810538
show_log_file_mode(void)
1053910539
{
10540-
staticcharbuf[8];
10540+
staticcharbuf[12];
1054110541

1054210542
snprintf(buf,sizeof(buf),"%04o",Log_file_mode);
1054310543
returnbuf;

‎src/bin/initdb/initdb.c

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -1009,12 +1009,12 @@ static char *
10091009
pretty_wal_size(intsegment_count)
10101010
{
10111011
intsz=wal_segment_size_mb*segment_count;
1012-
char*result=pg_malloc(11);
1012+
char*result=pg_malloc(14);
10131013

10141014
if ((sz %1024)==0)
1015-
snprintf(result,11,"%dGB",sz /1024);
1015+
snprintf(result,14,"%dGB",sz /1024);
10161016
else
1017-
snprintf(result,11,"%dMB",sz);
1017+
snprintf(result,14,"%dMB",sz);
10181018

10191019
returnresult;
10201020
}

‎src/bin/pg_dump/pg_backup_archiver.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1532,7 +1532,7 @@ SetOutput(ArchiveHandle *AH, const char *filename, int compression)
15321532
#ifdefHAVE_LIBZ
15331533
if (compression!=0)
15341534
{
1535-
charfmode[10];
1535+
charfmode[14];
15361536

15371537
/* Don't use PG_BINARY_x since this is zlib */
15381538
sprintf(fmode,"wb%d",compression);

‎src/bin/pg_dump/pg_backup_tar.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -335,7 +335,7 @@ tarOpen(ArchiveHandle *AH, const char *filename, char mode)
335335
TAR_MEMBER*tm;
336336

337337
#ifdefHAVE_LIBZ
338-
charfmode[10];
338+
charfmode[14];
339339
#endif
340340

341341
if (mode=='r')

‎src/bin/pgbench/pgbench.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -3591,7 +3591,7 @@ parseQuery(Command *cmd)
35913591
p=sql;
35923592
while ((p=strchr(p,':'))!=NULL)
35933593
{
3594-
charvar[12];
3594+
charvar[13];
35953595
char*name;
35963596
inteaten;
35973597

@@ -5432,7 +5432,7 @@ threadRun(void *arg)
54325432
sqlat,
54335433
lag,
54345434
stdev;
5435-
chartbuf[64];
5435+
chartbuf[315];
54365436

54375437
/*
54385438
* Add up the statistics of all threads.

‎src/include/postmaster/bgworker.h

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -82,7 +82,7 @@ typedef enum
8282

8383
#defineBGW_DEFAULT_RESTART_INTERVAL60
8484
#defineBGW_NEVER_RESTART-1
85-
#defineBGW_MAXLEN64
85+
#defineBGW_MAXLEN96
8686
#defineBGW_EXTRALEN128
8787

8888
typedefstructBackgroundWorker

‎src/interfaces/libpq/fe-secure-openssl.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1436,7 +1436,7 @@ PQsslAttribute(PGconn *conn, const char *attribute_name)
14361436

14371437
if (strcmp(attribute_name,"key_bits")==0)
14381438
{
1439-
staticcharsslbits_str[10];
1439+
staticcharsslbits_str[12];
14401440
intsslbits;
14411441

14421442
SSL_get_cipher_bits(conn->ssl,&sslbits);

‎src/pl/tcl/pltcl.c

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1456,7 +1456,7 @@ compile_pltcl_function(Oid fn_oid, Oid tgreloid,
14561456
Datumprosrcdatum;
14571457
boolisnull;
14581458
char*proc_source;
1459-
charbuf[32];
1459+
charbuf[48];
14601460
Tcl_Interp*interp;
14611461
inti;
14621462
inttcl_rc;

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