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7a6abbe937
systemd-stable/src/test/test-env-util.c
Lennart Poettering 7a6abbe937 env-util: add unsetenv_erase() helper 
Let's unify how we remove secrets from the env block.
2021-08-17 13:17:44 +02:00

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "env-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "fs-util.h"
#include "parse-util.h"
#include "process-util.h"
#include "serialize.h"
#include "string-util.h"
#include "strv.h"
#include "tests.h"
#include "util.h"
static void test_strv_env_delete(void) {
log_info("/* %s */", __func__);
_cleanup_strv_free_ char **a = NULL, **b = NULL, **c = NULL, **d = NULL;
a = strv_new("FOO=BAR", "WALDO=WALDO", "WALDO=", "PIEP", "SCHLUMPF=SMURF");
assert_se(a);
b = strv_new("PIEP", "FOO");
assert_se(b);
c = strv_new("SCHLUMPF");
assert_se(c);
d = strv_env_delete(a, 2, b, c);
assert_se(d);
assert_se(streq(d[0], "WALDO=WALDO"));
assert_se(streq(d[1], "WALDO="));
assert_se(strv_length(d) == 2);
}
static void test_strv_env_get(void) {
log_info("/* %s */", __func__);
char **l = STRV_MAKE("ONE_OR_TWO=1", "THREE=3", "ONE_OR_TWO=2", "FOUR=4");
assert_se(streq(strv_env_get(l, "ONE_OR_TWO"), "2"));
assert_se(streq(strv_env_get(l, "THREE"), "3"));
assert_se(streq(strv_env_get(l, "FOUR"), "4"));
}
static void test_strv_env_pairs_get(void) {
log_info("/* %s */", __func__);
char **l = STRV_MAKE("ONE_OR_TWO", "1", "THREE", "3", "ONE_OR_TWO", "2", "FOUR", "4", "FIVE", "5", "SIX", "FIVE", "SEVEN", "7");
assert_se(streq(strv_env_pairs_get(l, "ONE_OR_TWO"), "2"));
assert_se(streq(strv_env_pairs_get(l, "THREE"), "3"));
assert_se(streq(strv_env_pairs_get(l, "FOUR"), "4"));
assert_se(streq(strv_env_pairs_get(l, "FIVE"), "5"));
}
static void test_strv_env_unset(void) {
log_info("/* %s */", __func__);
_cleanup_strv_free_ char **l = NULL;
l = strv_new("PIEP", "SCHLUMPF=SMURFF", "NANANANA=YES");
assert_se(l);
assert_se(strv_env_unset(l, "SCHLUMPF") == l);
assert_se(streq(l[0], "PIEP"));
assert_se(streq(l[1], "NANANANA=YES"));
assert_se(strv_length(l) == 2);
}
static void test_strv_env_merge(void) {
log_info("/* %s */", __func__);
char **a = STRV_MAKE("FOO=BAR", "WALDO=WALDO", "WALDO=", "PIEP", "SCHLUMPF=SMURF", "EQ===");
char **b = STRV_MAKE("FOO=KKK", "FOO=", "PIEP=", "SCHLUMPF=SMURFF", "NANANANA=YES");
_cleanup_strv_free_ char **r = strv_env_merge(NULL, a, NULL, b, NULL, a, b, b, NULL);
assert_se(r);
assert_se(streq(r[0], "FOO="));
assert_se(streq(r[1], "WALDO="));
assert_se(streq(r[2], "PIEP"));
assert_se(streq(r[3], "SCHLUMPF=SMURFF"));
assert_se(streq(r[4], "EQ==="));
assert_se(streq(r[5], "PIEP="));
assert_se(streq(r[6], "NANANANA=YES"));
assert_se(strv_length(r) == 7);
assert_se(strv_env_clean(r) == r);
assert_se(streq(r[0], "FOO="));
assert_se(streq(r[1], "WALDO="));
assert_se(streq(r[2], "SCHLUMPF=SMURFF"));
assert_se(streq(r[3], "EQ==="));
assert_se(streq(r[4], "PIEP="));
assert_se(streq(r[5], "NANANANA=YES"));
assert_se(strv_length(r) == 6);
}
static void test_strv_env_replace_strdup(void) {
log_info("/* %s */", __func__);
_cleanup_strv_free_ char **a = NULL;
assert_se(strv_env_replace_strdup(&a, "a=a") == 1);
assert_se(strv_env_replace_strdup(&a, "b=b") == 1);
assert_se(strv_env_replace_strdup(&a, "a=A") == 0);
assert_se(strv_env_replace_strdup(&a, "c") == -EINVAL);
assert_se(strv_length(a) == 2);
strv_sort(a);
assert_se(streq(a[0], "a=A"));
assert_se(streq(a[1], "b=b"));
}
static void test_strv_env_replace_strdup_passthrough(void) {
log_info("/* %s */", __func__);
_cleanup_strv_free_ char **a = NULL;
assert_se(putenv((char*) "a=a") == 0);
assert_se(putenv((char*) "b=") == 0);
assert_se(unsetenv("c") == 0);
assert_se(strv_env_replace_strdup_passthrough(&a, "a") == 1);
assert_se(strv_env_replace_strdup_passthrough(&a, "b") == 1);
assert_se(strv_env_replace_strdup_passthrough(&a, "c") == 1);
assert_se(strv_env_replace_strdup_passthrough(&a, "a") == 0);
assert_se(strv_env_replace_strdup_passthrough(&a, "$a") == -EINVAL);
assert_se(strv_length(a) == 3);
assert_se(streq(a[0], "a=a"));
assert_se(streq(a[1], "b="));
assert_se(streq(a[2], "c="));
}
static void test_strv_env_assign(void) {
log_info("/* %s */", __func__);
_cleanup_strv_free_ char **a = NULL;
assert_se(strv_env_assign(&a, "a", "a") == 1);
assert_se(strv_env_assign(&a, "b", "b") == 1);
assert_se(strv_env_assign(&a, "a", "A") == 0);
assert_se(strv_env_assign(&a, "b", NULL) == 0);
assert_se(strv_env_assign(&a, "a=", "B") == -EINVAL);
assert_se(strv_length(a) == 1);
assert_se(streq(a[0], "a=A"));
}
static void test_env_strv_get_n(void) {
log_info("/* %s */", __func__);
const char *_env[] = {
"FOO=NO NO NO",
"FOO=BAR BAR",
"BAR=waldo",
"PATH=unset",
NULL
};
char **env = (char**) _env;
assert_se(streq(strv_env_get_n(env, "FOO__", 3, 0), "BAR BAR"));
assert_se(streq(strv_env_get_n(env, "FOO__", 3, REPLACE_ENV_USE_ENVIRONMENT), "BAR BAR"));
assert_se(streq(strv_env_get_n(env, "FOO", 3, 0), "BAR BAR"));
assert_se(streq(strv_env_get_n(env, "FOO", 3, REPLACE_ENV_USE_ENVIRONMENT), "BAR BAR"));
assert_se(streq(strv_env_get_n(env, "PATH__", 4, 0), "unset"));
assert_se(streq(strv_env_get_n(env, "PATH", 4, 0), "unset"));
assert_se(streq(strv_env_get_n(env, "PATH__", 4, REPLACE_ENV_USE_ENVIRONMENT), "unset"));
assert_se(streq(strv_env_get_n(env, "PATH", 4, REPLACE_ENV_USE_ENVIRONMENT), "unset"));
env[3] = NULL; /* kill our $PATH */
assert_se(!strv_env_get_n(env, "PATH__", 4, 0));
assert_se(!strv_env_get_n(env, "PATH", 4, 0));
assert_se(streq_ptr(strv_env_get_n(env, "PATH__", 4, REPLACE_ENV_USE_ENVIRONMENT),
getenv("PATH")));
assert_se(streq_ptr(strv_env_get_n(env, "PATH", 4, REPLACE_ENV_USE_ENVIRONMENT),
getenv("PATH")));
}
static void test_replace_env(bool braceless) {
log_info("/* %s(braceless=%s) */", __func__, yes_no(braceless));
const char *env[] = {
"FOO=BAR BAR",
"BAR=waldo",
NULL
};
_cleanup_free_ char *t = NULL, *s = NULL, *q = NULL, *r = NULL, *p = NULL;
unsigned flags = REPLACE_ENV_ALLOW_BRACELESS*braceless;
t = replace_env("FOO=$FOO=${FOO}", (char**) env, flags);
assert_se(streq(t, braceless ? "FOO=BAR BAR=BAR BAR" : "FOO=$FOO=BAR BAR"));
s = replace_env("BAR=$BAR=${BAR}", (char**) env, flags);
assert_se(streq(s, braceless ? "BAR=waldo=waldo" : "BAR=$BAR=waldo"));
q = replace_env("BARBAR=$BARBAR=${BARBAR}", (char**) env, flags);
assert_se(streq(q, braceless ? "BARBAR==" : "BARBAR=$BARBAR="));
r = replace_env("BAR=$BAR$BAR${BAR}${BAR}", (char**) env, flags);
assert_se(streq(r, braceless ? "BAR=waldowaldowaldowaldo" : "BAR=$BAR$BARwaldowaldo"));
p = replace_env("${BAR}$BAR$BAR", (char**) env, flags);
assert_se(streq(p, braceless ? "waldowaldowaldo" : "waldo$BAR$BAR"));
}
static void test_replace_env2(bool extended) {
log_info("/* %s(extended=%s) */", __func__, yes_no(extended));
const char *env[] = {
"FOO=foo",
"BAR=bar",
NULL
};
_cleanup_free_ char *t = NULL, *s = NULL, *q = NULL, *r = NULL, *p = NULL, *x = NULL;
unsigned flags = REPLACE_ENV_ALLOW_EXTENDED*extended;
t = replace_env("FOO=${FOO:-${BAR}}", (char**) env, flags);
assert_se(streq(t, extended ? "FOO=foo" : "FOO=${FOO:-bar}"));
s = replace_env("BAR=${XXX:-${BAR}}", (char**) env, flags);
assert_se(streq(s, extended ? "BAR=bar" : "BAR=${XXX:-bar}"));
q = replace_env("XXX=${XXX:+${BAR}}", (char**) env, flags);
assert_se(streq(q, extended ? "XXX=" : "XXX=${XXX:+bar}"));
r = replace_env("FOO=${FOO:+${BAR}}", (char**) env, flags);
assert_se(streq(r, extended ? "FOO=bar" : "FOO=${FOO:+bar}"));
p = replace_env("FOO=${FOO:-${BAR}post}", (char**) env, flags);
assert_se(streq(p, extended ? "FOO=foo" : "FOO=${FOO:-barpost}"));
x = replace_env("XXX=${XXX:+${BAR}post}", (char**) env, flags);
assert_se(streq(x, extended ? "XXX=" : "XXX=${XXX:+barpost}"));
}
static void test_replace_env_argv(void) {
log_info("/* %s */", __func__);
const char *env[] = {
"FOO=BAR BAR",
"BAR=waldo",
NULL
};
const char *line[] = {
"FOO$FOO",
"FOO$FOOFOO",
"FOO${FOO}$FOO",
"FOO${FOO}",
"${FOO}",
"$FOO",
"$FOO$FOO",
"${FOO}${BAR}",
"${FOO",
"FOO$$${FOO}",
"$$FOO${FOO}",
"${FOO:-${BAR}}",
"${QUUX:-${FOO}}",
"${FOO:+${BAR}}",
"${QUUX:+${BAR}}",
"${FOO:+|${BAR}|}}",
"${FOO:+|${BAR}{|}",
NULL
};
_cleanup_strv_free_ char **r = NULL;
r = replace_env_argv((char**) line, (char**) env);
assert_se(r);
assert_se(streq(r[0], "FOO$FOO"));
assert_se(streq(r[1], "FOO$FOOFOO"));
assert_se(streq(r[2], "FOOBAR BAR$FOO"));
assert_se(streq(r[3], "FOOBAR BAR"));
assert_se(streq(r[4], "BAR BAR"));
assert_se(streq(r[5], "BAR"));
assert_se(streq(r[6], "BAR"));
assert_se(streq(r[7], "BAR BARwaldo"));
assert_se(streq(r[8], "${FOO"));
assert_se(streq(r[9], "FOO$BAR BAR"));
assert_se(streq(r[10], "$FOOBAR BAR"));
assert_se(streq(r[11], "${FOO:-waldo}"));
assert_se(streq(r[12], "${QUUX:-BAR BAR}"));
assert_se(streq(r[13], "${FOO:+waldo}"));
assert_se(streq(r[14], "${QUUX:+waldo}"));
assert_se(streq(r[15], "${FOO:+|waldo|}}"));
assert_se(streq(r[16], "${FOO:+|waldo{|}"));
assert_se(strv_length(r) == 17);
}
static void test_env_clean(void) {
log_info("/* %s */", __func__);
_cleanup_strv_free_ char **e = strv_new("FOOBAR=WALDO",
"FOOBAR=WALDO",
"FOOBAR",
"F",
"X=",
"F=F",
"=",
"=F",
"",
"0000=000",
"äöüß=abcd",
"abcd=äöüß",
"xyz\n=xyz",
"xyz=xyz\n",
"another=one",
"another=final one",
"CRLF=\r\n",
"LESS_TERMCAP_mb=\x1b[01;31m",
"BASH_FUNC_foo%%=() { echo foo\n}");
assert_se(e);
assert_se(!strv_env_is_valid(e));
assert_se(strv_env_clean(e) == e);
assert_se(strv_env_is_valid(e));
assert_se(streq(e[0], "FOOBAR=WALDO"));
assert_se(streq(e[1], "X="));
assert_se(streq(e[2], "F=F"));
assert_se(streq(e[3], "abcd=äöüß"));
assert_se(streq(e[4], "xyz=xyz\n"));
assert_se(streq(e[5], "another=final one"));
assert_se(streq(e[6], "CRLF=\r\n"));
assert_se(streq(e[7], "LESS_TERMCAP_mb=\x1b[01;31m"));
assert_se(e[8] == NULL);
}
static void test_env_name_is_valid(void) {
log_info("/* %s */", __func__);
assert_se(env_name_is_valid("test"));
assert_se(!env_name_is_valid(NULL));
assert_se(!env_name_is_valid(""));
assert_se(!env_name_is_valid("xxx\a"));
assert_se(!env_name_is_valid("xxx\007b"));
assert_se(!env_name_is_valid("\007\009"));
assert_se(!env_name_is_valid("5_starting_with_a_number_is_wrong"));
assert_se(!env_name_is_valid("#¤%&?_only_numbers_letters_and_underscore_allowed"));
}
static void test_env_value_is_valid(void) {
log_info("/* %s */", __func__);
assert_se(env_value_is_valid(""));
assert_se(env_value_is_valid("głąb kapuściany"));
assert_se(env_value_is_valid("printf \"\\x1b]0;<mock-chroot>\\x07<mock-chroot>\""));
assert_se(env_value_is_valid("tab\tcharacter"));
assert_se(env_value_is_valid("new\nline"));
assert_se(env_value_is_valid("Show this?\rNope. Show that!"));
assert_se(env_value_is_valid("new DOS\r\nline"));
assert_se(!env_value_is_valid("\xc5")); /* A truncated utf-8-encoded "ł".
* We currently disallow that. */
}
static void test_env_assignment_is_valid(void) {
log_info("/* %s */", __func__);
assert_se(env_assignment_is_valid("a="));
assert_se(env_assignment_is_valid("b=głąb kapuściany"));
assert_se(env_assignment_is_valid("c=\\007\\009\\011"));
assert_se(env_assignment_is_valid("e=printf \"\\x1b]0;<mock-chroot>\\x07<mock-chroot>\""));
assert_se(env_assignment_is_valid("f=tab\tcharacter"));
assert_se(env_assignment_is_valid("g=new\nline"));
assert_se(!env_assignment_is_valid("="));
assert_se(!env_assignment_is_valid("a b="));
assert_se(!env_assignment_is_valid("a ="));
assert_se(!env_assignment_is_valid(" b="));
/* no dots or dashes: http://tldp.org/LDP/abs/html/gotchas.html */
assert_se(!env_assignment_is_valid("a.b="));
assert_se(!env_assignment_is_valid("a-b="));
assert_se(!env_assignment_is_valid("\007=głąb kapuściany"));
assert_se(!env_assignment_is_valid("c\009=\007\009\011"));
assert_se(!env_assignment_is_valid("głąb=printf \"\x1b]0;<mock-chroot>\x07<mock-chroot>\""));
}
static void test_putenv_dup(void) {
log_info("/* %s */", __func__);
assert_se(putenv_dup("A=a1", true) == 0);
assert_se(streq_ptr(getenv("A"), "a1"));
assert_se(putenv_dup("A=a1", true) == 0);
assert_se(streq_ptr(getenv("A"), "a1"));
assert_se(putenv_dup("A=a2", false) == 0);
assert_se(streq_ptr(getenv("A"), "a1"));
assert_se(putenv_dup("A=a2", true) == 0);
assert_se(streq_ptr(getenv("A"), "a2"));
}
static void test_setenv_systemd_exec_pid(void) {
_cleanup_free_ char *saved = NULL;
const char *e;
pid_t p;
log_info("/* %s */", __func__);
e = getenv("SYSTEMD_EXEC_PID");
if (e)
assert_se(saved = strdup(e));
assert_se(unsetenv("SYSTEMD_EXEC_PID") >= 0);
assert_se(setenv_systemd_exec_pid(true) == 0);
assert_se(!getenv("SYSTEMD_EXEC_PID"));
assert_se(setenv("SYSTEMD_EXEC_PID", "*", 1) >= 0);
assert_se(setenv_systemd_exec_pid(true) == 0);
assert_se(e = getenv("SYSTEMD_EXEC_PID"));
assert_se(streq(e, "*"));
assert_se(setenv("SYSTEMD_EXEC_PID", "123abc", 1) >= 0);
assert_se(setenv_systemd_exec_pid(true) == 1);
assert_se(e = getenv("SYSTEMD_EXEC_PID"));
assert_se(parse_pid(e, &p) >= 0);
assert_se(p == getpid_cached());
assert_se(unsetenv("SYSTEMD_EXEC_PID") >= 0);
assert_se(setenv_systemd_exec_pid(false) == 1);
assert_se(e = getenv("SYSTEMD_EXEC_PID"));
assert_se(parse_pid(e, &p) >= 0);
assert_se(p == getpid_cached());
assert_se(set_unset_env("SYSTEMD_EXEC_PID", saved, 1) >= 0);
}
static void test_unsetenv_erase(void) {
int r;
log_info("/* %s */", __func__);
r = safe_fork("(sd-unsetenverase)", FORK_DEATHSIG|FORK_LOG|FORK_WAIT, NULL);
if (r == 0) {
_cleanup_strv_free_ char **l = NULL;
char **e;
/* child */
assert_se(unsetenv_erase("thisenvvardefinitelywontexist") == 0);
l = strv_new("FOO=BAR", "QUUX=PIFF", "ONE=TWO", "A=B");
assert_se(strv_length(l) == 4);
environ = l;
STRV_FOREACH(e, environ) {
_cleanup_free_ char *n = NULL;
char *eq;
eq = strchr(*e, '=');
if (!eq)
continue;
n = strndup(*e, eq - *e);
assert_se(n);
assert_se(streq_ptr(getenv(n), eq + 1));
assert_se(getenv(n) == eq + 1);
assert_se(unsetenv_erase(n) > 0);
assert_se(isempty(eq + 1));
assert_se(!getenv(n));
}
environ = NULL;
l = strv_free(l);
_exit(EXIT_SUCCESS);
}
assert_se(r > 0);
}
int main(int argc, char *argv[]) {
test_setup_logging(LOG_DEBUG);
test_strv_env_delete();
test_strv_env_get();
test_strv_env_pairs_get();
test_strv_env_unset();
test_strv_env_merge();
test_strv_env_replace_strdup();
test_strv_env_replace_strdup_passthrough();
test_strv_env_assign();
test_env_strv_get_n();
test_replace_env(false);
test_replace_env(true);
test_replace_env2(false);
test_replace_env2(true);
test_replace_env_argv();
test_env_clean();
test_env_name_is_valid();
test_env_value_is_valid();
test_env_assignment_is_valid();
test_putenv_dup();
test_setenv_systemd_exec_pid();
test_unsetenv_erase();
return 0;
}
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