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Parse libpq's "keepalives" option more like other integer options.

Use pqParseIntParam (nee parse_int_param) instead of using strtoldirectly. This allows trailing whitespace, which the previous codingdidn't, and makes the spelling of the error message consistent withother similar cases.This seems to be an oversight in commite7a2217, which introducedparse_int_param. That fixed places that were using atoi(), but missedthis place which was randomly using strtol() instead.Ordinarily I'd consider this minor cleanup not worth back-patching.However, it seems that ecpg assumes it can add trailing whitespaceto URL parameters, so that use of the keepalives option fails inthat context. Perhaps that's worth improving as a separate matter.In the meantime, back-patch this to all supported branches.Yuto Sasaki (some further cleanup by me)Discussion:https://postgr.es/m/TY2PR01MB36286A7B97B9A15793335D18C1772@TY2PR01MB3628.jpnprd01.prod.outlook.com

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src/interfaces/libpq
- fe-connect.c

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`‎src/interfaces/libpq/fe-connect.c`

Lines changed: 4 additions & 4 deletions

Original file line number	Diff line number	Diff line change
`@@ -2067,14 +2067,14 @@ connectFailureMessage(PGconn *conn, int errorno)`
`2067`	`2067`	`staticint`
`2068`	`2068`	`useKeepalives(PGconn*conn)`
`2069`	`2069`	`{`
`2070`		`-char*ep;`
`2071`	`2070`	`intval;`
`2072`	`2071`
`2073`	`2072`	`if (conn->keepalives==NULL)`
`2074`	`2073`	`return1;`
`2075`		`-val=strtol(conn->keepalives,&ep,10);`
`2076`		`-if (*ep)`
	`2074`	`+`
	`2075`	`+if (!parse_int_param(conn->keepalives,&val,conn,"keepalives"))`
`2077`	`2076`	`return-1;`
	`2077`	`+`
`2078`	`2078`	`returnval!=0 ?1 :0;`
`2079`	`2079`	`}`
`2080`	`2080`
`@@ -2958,7 +2958,7 @@ PQconnectPoll(PGconn *conn)`
`2958`	`2958`
`2959`	`2959`	`if (usekeepalives<0)`
`2960`	`2960`	`{`
`2961`		`-libpq_append_conn_error(conn,"keepalives parameter must be an integer");`
	`2961`	`+/* error is already reported */`
`2962`	`2962`	`err=1;`
`2963`	`2963`	`}`
`2964`	`2964`	`elseif (usekeepalives==0)`

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Commit65f431a

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`‎src/interfaces/libpq/fe-connect.c`

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