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test-nss-hosts: make buffer size configurable too and document it

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This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2021-03-12 14:37:18 +01:00
parent e2aa384bcd
commit f0cb09bb0f
2 changed files with 25 additions and 11 deletions
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13
docs/ENVIRONMENT.md
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@ -198,11 +198,6 @@ All tools:
prefixed with `:` in which case the kernel command line option takes
precedence, if it is specified as well.
installed systemd tests:
* `$SYSTEMD_TEST_DATA` — override the location of test data. This is useful if
a test executable is moved to an arbitrary location.
`nss-systemd`:
* `$SYSTEMD_NSS_BYPASS_SYNTHETIC=1` — if set, `nss-systemd` won't synthesize
@ -302,6 +297,14 @@ installed systemd tests:
* `$SYSTEMD_SYSVRCND_PATH` — Controls where `systemd-sysv-generator` looks for
SysV init script runlevel link farms.
systemd tests:
* `$SYSTEMD_TEST_DATA` — override the location of test data. This is useful if
a test executable is moved to an arbitrary location.
* `$SYSTEMD_TEST_NSS_BUFSIZE` — size of scratch buffers for "reentrant"
functions exported by the nss modules.
fuzzers:
* `$SYSTEMD_FUZZ_OUTPUT` — A boolean that specifies whether to write output to

23
src/test/test-nss-hosts.c
View File

@ -17,12 +17,15 @@
#include "main-func.h"
#include "nss-test-util.h"
#include "nss-util.h"
#include "parse-util.h"
#include "path-util.h"
#include "stdio-util.h"
#include "string-util.h"
#include "strv.h"
#include "tests.h"
static size_t arg_bufsize = 1024;
static const char* af_to_string(int family, char *buf, size_t buf_len) {
const char *name;
@ -99,7 +102,7 @@ static void print_struct_hostent(struct hostent *host, const char *canon) {
static void test_gethostbyname4_r(void *handle, const char *module, const char *name) {
const char *fname;
_nss_gethostbyname4_r_t f;
char buffer[2000];
char buffer[arg_bufsize];
struct gaih_addrtuple *pat = NULL;
int errno1 = 999, errno2 = 999; /* nss-dns doesn't set those */
int32_t ttl = INT32_MAX; /* nss-dns wants to return the lowest ttl,
@ -151,7 +154,7 @@ static void test_gethostbyname4_r(void *handle, const char *module, const char *
static void test_gethostbyname3_r(void *handle, const char *module, const char *name, int af) {
const char *fname;
_nss_gethostbyname3_r_t f;
char buffer[2000];
char buffer[arg_bufsize];
int errno1 = 999, errno2 = 999; /* nss-dns doesn't set those */
int32_t ttl = INT32_MAX; /* nss-dns wants to return the lowest ttl,
and will access this variable through *ttlp,
@ -186,7 +189,7 @@ static void test_gethostbyname3_r(void *handle, const char *module, const char *
static void test_gethostbyname2_r(void *handle, const char *module, const char *name, int af) {
const char *fname;
_nss_gethostbyname2_r_t f;
char buffer[2000];
char buffer[arg_bufsize];
int errno1 = 999, errno2 = 999; /* nss-dns doesn't set those */
enum nss_status status;
char pretty_status[DECIMAL_STR_MAX(enum nss_status)];
@ -214,7 +217,7 @@ static void test_gethostbyname2_r(void *handle, const char *module, const char *
static void test_gethostbyname_r(void *handle, const char *module, const char *name) {
const char *fname;
_nss_gethostbyname_r_t f;
char buffer[2000];
char buffer[arg_bufsize];
int errno1 = 999, errno2 = 999; /* nss-dns doesn't set those */
enum nss_status status;
char pretty_status[DECIMAL_STR_MAX(enum nss_status)];
@ -245,7 +248,7 @@ static void test_gethostbyaddr2_r(void *handle,
const char *fname;
_nss_gethostbyaddr2_r_t f;
char buffer[2000];
char buffer[arg_bufsize];
int errno1 = 999, errno2 = 999; /* nss-dns doesn't set those */
enum nss_status status;
char pretty_status[DECIMAL_STR_MAX(enum nss_status)];
@ -283,7 +286,7 @@ static void test_gethostbyaddr_r(void *handle,
const char *fname;
_nss_gethostbyaddr_r_t f;
char buffer[2000];
char buffer[arg_bufsize];
int errno1 = 999, errno2 = 999; /* nss-dns doesn't set those */
enum nss_status status;
char pretty_status[DECIMAL_STR_MAX(enum nss_status)];
@ -404,8 +407,16 @@ static int parse_argv(int argc, char **argv,
_cleanup_strv_free_ char **modules = NULL, **names = NULL;
_cleanup_free_ struct local_address *addrs = NULL;
size_t n_allocated = 0;
const char *p;
int r, n = 0;
p = getenv("SYSTEMD_TEST_NSS_BUFSIZE");
if (p) {
r = safe_atozu(p, &arg_bufsize);
if (r < 0)
return log_error_errno(r, "Failed to parse $SYSTEMD_TEST_NSS_BUFSIZE");
}
if (argc > 1)
modules = strv_new(argv[1]);
else