forked from rpms/glibc
c711e702dd
Introduce the strict-error/RES_STRICTERR stub resolver option (RHEL-50662) Resolves: RHEL-50662
84 lines
3.4 KiB
Diff
84 lines
3.4 KiB
Diff
commit 95f61610f3e481d191b6184432342236fd59186d
|
|
Author: Florian Weimer <fweimer@redhat.com>
|
|
Date: Wed Jul 24 12:06:47 2024 +0200
|
|
|
|
resolv: Support clearing option flags with a “-” prefix (bug 14799)
|
|
|
|
I think using a “-” prefix is less confusing than introducing
|
|
double-negation construct (“no-no-tld-query”).
|
|
|
|
Reviewed-by: DJ Delorie <dj@redhat.com>
|
|
|
|
Conflicts:
|
|
NEWS
|
|
(Dropped)
|
|
|
|
diff --git a/resolv/res_init.c b/resolv/res_init.c
|
|
index 263263d474..243532b3ad 100644
|
|
--- a/resolv/res_init.c
|
|
+++ b/resolv/res_init.c
|
|
@@ -682,27 +682,29 @@ res_setoptions (struct resolv_conf_parser *parser, const char *options)
|
|
{
|
|
char str[22];
|
|
uint8_t len;
|
|
- uint8_t clear;
|
|
unsigned long int flag;
|
|
} options[] = {
|
|
#define STRnLEN(str) str, sizeof (str) - 1
|
|
- { STRnLEN ("rotate"), 0, RES_ROTATE },
|
|
- { STRnLEN ("edns0"), 0, RES_USE_EDNS0 },
|
|
- { STRnLEN ("single-request-reopen"), 0, RES_SNGLKUPREOP },
|
|
- { STRnLEN ("single-request"), 0, RES_SNGLKUP },
|
|
- { STRnLEN ("no_tld_query"), 0, RES_NOTLDQUERY },
|
|
- { STRnLEN ("no-tld-query"), 0, RES_NOTLDQUERY },
|
|
- { STRnLEN ("no-reload"), 0, RES_NORELOAD },
|
|
- { STRnLEN ("use-vc"), 0, RES_USEVC },
|
|
- { STRnLEN ("trust-ad"), 0, RES_TRUSTAD },
|
|
- { STRnLEN ("no-aaaa"), 0, RES_NOAAAA },
|
|
+ { STRnLEN ("rotate"), RES_ROTATE },
|
|
+ { STRnLEN ("edns0"), RES_USE_EDNS0 },
|
|
+ { STRnLEN ("single-request-reopen"), RES_SNGLKUPREOP },
|
|
+ { STRnLEN ("single-request"), RES_SNGLKUP },
|
|
+ { STRnLEN ("no_tld_query"), RES_NOTLDQUERY },
|
|
+ { STRnLEN ("no-tld-query"), RES_NOTLDQUERY },
|
|
+ { STRnLEN ("no-reload"), RES_NORELOAD },
|
|
+ { STRnLEN ("use-vc"), RES_USEVC },
|
|
+ { STRnLEN ("trust-ad"), RES_TRUSTAD },
|
|
+ { STRnLEN ("no-aaaa"), RES_NOAAAA },
|
|
};
|
|
#define noptions (sizeof (options) / sizeof (options[0]))
|
|
+ bool negate_option = *cp == '-';
|
|
+ if (negate_option)
|
|
+ ++cp;
|
|
for (int i = 0; i < noptions; ++i)
|
|
if (strncmp (cp, options[i].str, options[i].len) == 0)
|
|
{
|
|
- if (options[i].clear)
|
|
- parser->template.options &= options[i].flag;
|
|
+ if (negate_option)
|
|
+ parser->template.options &= ~options[i].flag;
|
|
else
|
|
parser->template.options |= options[i].flag;
|
|
break;
|
|
diff --git a/resolv/tst-resolv-res_init-skeleton.c b/resolv/tst-resolv-res_init-skeleton.c
|
|
index 6bef62cde2..d3a19eb305 100644
|
|
--- a/resolv/tst-resolv-res_init-skeleton.c
|
|
+++ b/resolv/tst-resolv-res_init-skeleton.c
|
|
@@ -679,6 +679,16 @@ struct test_case test_cases[] =
|
|
"; nameserver[0]: [192.0.2.1]:53\n",
|
|
.res_options = "attempts:5 ndots:3 edns0 ",
|
|
},
|
|
+ {.name = "RES_OPTIONS can clear flags",
|
|
+ .conf = "options ndots:2 use-vc no-aaaa edns0\n"
|
|
+ "nameserver 192.0.2.1\n",
|
|
+ .expected = "options ndots:3 use-vc\n"
|
|
+ "search example.com\n"
|
|
+ "; search[0]: example.com\n"
|
|
+ "nameserver 192.0.2.1\n"
|
|
+ "; nameserver[0]: [192.0.2.1]:53\n",
|
|
+ .res_options = "ndots:3 -edns0 -no-aaaa",
|
|
+ },
|
|
{.name = "many search list entries (bug 19569)",
|
|
.conf = "nameserver 192.0.2.1\n"
|
|
"search corp.example.com support.example.com"
|