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Fix initdb's -c option to treat the GUC name case-insensitively.

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The backend treats GUC names case-insensitively, so this code should
too.  This avoids ending up with a confusing set of redundant entries
in the generated postgresql.conf file.

Per report from Kyotaro Horiguchi.  Back-patch to v16 where this
feature was added (in commit 3e51b278d).

Discussion: https://postgr.es/m/20230928.164904.2153358973162534034.horikyota.ntt@gmail.com
This commit is contained in:
Tom Lane 2024-03-04 12:00:39 -05:00
parent a0b808baef
commit fce2ce797c
2 changed files with 21 additions and 2 deletions
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9
src/bin/initdb/initdb.c
View File

@ -484,6 +484,7 @@ replace_guc_value(char **lines, const char *guc_name, const char *guc_value,
for (i = 0; lines[i]; i++)
{
const char *where;
const char *namestart;
/*
* Look for a line assigning to guc_name. Typically it will be
@ -494,15 +495,19 @@ replace_guc_value(char **lines, const char *guc_name, const char *guc_value,
where = lines[i];
while (*where == '#' || isspace((unsigned char) *where))
where++;
if (strncmp(where, guc_name, namelen) != 0)
if (pg_strncasecmp(where, guc_name, namelen) != 0)
continue;
namestart = where;
where += namelen;
while (isspace((unsigned char) *where))
where++;
if (*where != '=')
continue;
/* found it -- append the original comment if any */
/* found it -- let's use the canonical casing shown in the file */
memcpy(&newline->data[mark_as_comment ? 1 : 0], namestart, namelen);
/* now append the original comment if any */
where = strrchr(where, '#');
if (where)
{

14
src/bin/initdb/t/001_initdb.pl
View File

@ -199,4 +199,18 @@ command_fails(
command_fails([ 'initdb', '--no-sync', '--set', 'foo=bar', "$tempdir/dataX" ],
'fails for invalid --set option');
# Make sure multiple invocations of -c parameters are added case insensitive
command_ok(
[
'initdb', '-cwork_mem=128',
'-cWork_Mem=256', '-cWORK_MEM=512',
"$tempdir/dataY"
],
'multiple -c options with different case');
my $conf = slurp_file("$tempdir/dataY/postgresql.conf");
ok($conf !~ qr/^WORK_MEM = /m, "WORK_MEM should not be configured");
ok($conf !~ qr/^Work_Mem = /m, "Work_Mem should not be configured");
ok($conf =~ qr/^work_mem = 512/m, "work_mem should be in config");
done_testing();