Avoid use of sprintf/snprintf in describe.c.

Most places were already using the PQExpBuffer library for constructing
variable-length strings; bring the two stragglers into line.
describeOneTSParser was living particularly dangerously since it wasn't
even using snprintf().

Daniel Gustafsson

Discussion: https://postgr.es/m/3641F19B-336A-431A-86CE-A80562505C5E@yesql.se

diff --git a/src/bin/psql/describe.c b/src/bin/psql/describe.c
index 03ef1b070c13267c367dadbb9c787039e15faf5b..4f4790cc5c421d7c6ae15e2058824df9e3a828e8 100644 (file)
--- a/src/bin/psql/describe.c
+++ b/src/bin/psql/describe.c
@@ -4113,7 +4113,7 @@ describeOneTSParser(const char *oid, const char *nspname, const char *prsname)
 {
    PQExpBufferData buf;
    PGresult   *res;
-   char        title[1024];
+   PQExpBufferData title;
    printQueryOpt myopt = pset.popt;
    static const bool translate_columns[] = {true, false, false};
 
@@ -4169,11 +4169,13 @@ describeOneTSParser(const char *oid, const char *nspname, const char *prsname)
        return false;
 
    myopt.nullPrint = NULL;
+   initPQExpBuffer(&title);
    if (nspname)
-       sprintf(title, _("Text search parser \"%s.%s\""), nspname, prsname);
+       printfPQExpBuffer(&title, _("Text search parser \"%s.%s\""),
+                         nspname, prsname);
    else
-       sprintf(title, _("Text search parser \"%s\""), prsname);
-   myopt.title = title;
+       printfPQExpBuffer(&title, _("Text search parser \"%s\""), prsname);
+   myopt.title = title.data;
    myopt.footers = NULL;
    myopt.topt.default_footer = false;
    myopt.translate_header = true;
@@ -4202,10 +4204,11 @@ describeOneTSParser(const char *oid, const char *nspname, const char *prsname)
 
    myopt.nullPrint = NULL;
    if (nspname)
-       sprintf(title, _("Token types for parser \"%s.%s\""), nspname, prsname);
+       printfPQExpBuffer(&title, _("Token types for parser \"%s.%s\""),
+                         nspname, prsname);
    else
-       sprintf(title, _("Token types for parser \"%s\""), prsname);
-   myopt.title = title;
+       printfPQExpBuffer(&title, _("Token types for parser \"%s\""), prsname);
+   myopt.title = title.data;
    myopt.footers = NULL;
    myopt.topt.default_footer = true;
    myopt.translate_header = true;
@@ -4214,6 +4217,7 @@ describeOneTSParser(const char *oid, const char *nspname, const char *prsname)
 
    printQuery(res, &myopt, pset.queryFout, false, pset.logfile);
 
+   termPQExpBuffer(&title);
    PQclear(res);
    return true;
 }
@@ -5004,7 +5008,7 @@ listOneExtensionContents(const char *extname, const char *oid)
 {
    PQExpBufferData buf;
    PGresult   *res;
-   char        title[1024];
+   PQExpBufferData title;
    printQueryOpt myopt = pset.popt;
 
    initPQExpBuffer(&buf);
@@ -5022,12 +5026,14 @@ listOneExtensionContents(const char *extname, const char *oid)
        return false;
 
    myopt.nullPrint = NULL;
-   snprintf(title, sizeof(title), _("Objects in extension \"%s\""), extname);
-   myopt.title = title;
+   initPQExpBuffer(&title);
+   printfPQExpBuffer(&title, _("Objects in extension \"%s\""), extname);
+   myopt.title = title.data;
    myopt.translate_header = true;
 
    printQuery(res, &myopt, pset.queryFout, false, pset.logfile);
 
+   termPQExpBuffer(&title);
    PQclear(res);
    return true;
 }