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sd-login: translate -ENOMEDIUM to -ENODATA

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The -ENOMEDIUM return value was introduced in v232-1001-g2977724b09,
('core: make hybrid cgroup unified mode keep compat /sys/fs/cgroup/systemd hierarchy'),
and would be returned by cg_pid_get_path_shifted(), but the documented and
expected return value is -ENODATA. Let's just catch ENXIO/ENOMEDIUM and translate
it to ENODATA in all cases.

Complements 171f8f591f, fixes #6012.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2017-05-30 20:21:45 -04:00
parent 5e354b2252
commit bc9e9af137
3 changed files with 21 additions and 12 deletions
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2
man/sd_pid_get_session.xml
View file

@ -285,7 +285,7 @@
</varlistentry>
<varlistentry>
<term><constant>-BADF</constant></term>
<term><constant>-EBADF</constant></term>
<listitem><para>The specified socket file descriptor was
invalid.</para></listitem>

22
src/libsystemd/sd-login/sd-login.c
View file

@ -62,7 +62,7 @@ _public_ int sd_pid_get_session(pid_t pid, char **session) {
assert_return(session, -EINVAL);
r = cg_pid_get_session(pid, session);
return r == -ENXIO ? -ENODATA : r;
return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r;
}
_public_ int sd_pid_get_unit(pid_t pid, char **unit) {
@ -72,7 +72,7 @@ _public_ int sd_pid_get_unit(pid_t pid, char **unit) {
assert_return(unit, -EINVAL);
r = cg_pid_get_unit(pid, unit);
return r == -ENXIO ? -ENODATA : r;
return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r;
}
_public_ int sd_pid_get_user_unit(pid_t pid, char **unit) {
@ -82,39 +82,47 @@ _public_ int sd_pid_get_user_unit(pid_t pid, char **unit) {
assert_return(unit, -EINVAL);
r = cg_pid_get_user_unit(pid, unit);
return r == -ENXIO ? -ENODATA : r;
return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r;
}
_public_ int sd_pid_get_machine_name(pid_t pid, char **name) {
int r;
assert_return(pid >= 0, -EINVAL);
assert_return(name, -EINVAL);
return cg_pid_get_machine_name(pid, name);
r = cg_pid_get_machine_name(pid, name);
return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r;
}
_public_ int sd_pid_get_slice(pid_t pid, char **slice) {
int r;
assert_return(pid >= 0, -EINVAL);
assert_return(slice, -EINVAL);
return cg_pid_get_slice(pid, slice);
r = cg_pid_get_slice(pid, slice);
return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r;
}
_public_ int sd_pid_get_user_slice(pid_t pid, char **slice) {
int r;
assert_return(pid >= 0, -EINVAL);
assert_return(slice, -EINVAL);
return cg_pid_get_user_slice(pid, slice);
r = cg_pid_get_user_slice(pid, slice);
return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r;
}
_public_ int sd_pid_get_owner_uid(pid_t pid, uid_t *uid) {
int r;
assert_return(pid >= 0, -EINVAL);
assert_return(uid, -EINVAL);
return cg_pid_get_owner_uid(pid, uid);
r = cg_pid_get_owner_uid(pid, uid);
return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r;
}
_public_ int sd_pid_get_cgroup(pid_t pid, char **cgroup) {

9
src/libsystemd/sd-login/test-login.c
View file

@ -61,14 +61,15 @@ static void test_login(void) {
r = sd_pid_get_unit(0, &unit);
assert_se(r >= 0 || r == -ENODATA);
log_info("sd_pid_get_unit(0, …) → \"%s\"", unit);
log_info("sd_pid_get_unit(0, …) → \"%s\"", strna(unit));
r = sd_pid_get_user_unit(0, &user_unit);
assert_se(r >= 0 || r == -ENODATA);
log_info("sd_pid_get_user_unit(0, …) → \"%s\"", user_unit);
log_info("sd_pid_get_user_unit(0, …) → \"%s\"", strna(user_unit));
assert_se(sd_pid_get_slice(0, &slice) >= 0);
log_info("sd_pid_get_slice(0, …) → \"%s\"", slice);
r = sd_pid_get_slice(0, &slice);
assert_se(r >= 0 || r == -ENODATA);
log_info("sd_pid_get_slice(0, …) → \"%s\"", strna(slice));
r = sd_pid_get_session(0, &session);
if (r < 0) {